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CheckMate 9LA: ‘Doing better’ for stage IV/recurrent NSCLC
Data from the CheckMate 9LA study suggest the combination amplifies the rapid response expected from chemotherapy and the long-term benefit from immunotherapy. Furthermore, the very limited exposure to chemotherapy appears to mitigate long-term risks.
Martin Reck, MD, PhD, of LungenClinic Grosshansdorf in Germany, reported the data as part of the American Society of Clinical Oncology virtual scientific program (Abstract 9501).
A prior trial, CheckMate 227, demonstrated that nivolumab plus ipilimumab improved overall survival (OS) and durability of response in comparison with conventional chemotherapy in advanced NSCLC, regardless of PD-L1 expression (N Engl J Med 2019; 381:2020-31).
In CheckMate 9LA, researchers tested whether adding a limited course of chemotherapy – just two cycles – could improve outcomes further. Dr. Reck reported that, at the first preplanned interim analysis, the combination met its primary goal of improving OS as well as meeting multiple secondary endpoints.
Details of CheckMate 9LA
CheckMate 9LA included 719 treatment-naive patients with histologically confirmed stage IV or recurrent NSCLC and no known sensitizing alterations in EGFR or ALK. All patients had an Eastern Cooperative Oncology Group performance status of 0 or 1.
Patients received either nivolumab plus ipilimumab at standard NSCLC doses plus two cycles of chemotherapy or chemotherapy alone for four cycles.
The chemotherapy regimen was tailored by histology. Pemetrexed plus either cisplatin or carboplatin, with optional pemetrexed maintenance, was administered to patients with non-squamous histology. Paclitaxel plus carboplatin was chosen for patients with squamous disease.
If there was no disease progression or unacceptable toxicity, patients receiving nivolumab plus ipilimumab could continue immunotherapy for up to 2 years.
Patients were stratified by PD-L1 expression (< 1% vs. ≥ 1%), gender, and histology (squamous vs. non-squamous). Tumor and clinical characteristics were balanced across the trial arms.
The primary endpoint was OS, with secondary endpoints of progression-free survival, objective response rate by blinded independent central review, and efficacy by PD-L1 subgroups. Exploratory endpoints included safety/tolerability.
Results prompt FDA approval
Dr. Reck and colleagues found significantly better OS with nivolumab-ipilimumab plus chemotherapy, in comparison with chemotherapy alone (hazard ratio, 0.69; P = .0006).
With longer follow-up (minimum 12.7 months), nivolumab-ipilimumab plus chemotherapy continued to provide longer OS compared with chemotherapy alone. The median OS was 15.6 months and 10.9 months, respectively (HR, 0.66).
Despite more patients receiving subsequent systemic therapy in the chemotherapy-alone arm (34% of whom eventually received an immune checkpoint inhibitor), the immunotherapy-chemotherapy arm still yielded superior OS in the overall population.
One-year OS rates were 63% in the immunotherapy arm and 47% in the chemotherapy-alone arm.
Statistically significant improvements in progression-free survival and objective response rate were seen. The median response duration was 11.3 months in the immunotherapy arm and 5.6 months in the chemotherapy-alone arm.
Benefit was consistent by all efficacy measures and in all subgroups, including by PD-L1 expression and histology.
Based on the strength of these results, in May, the Food and Drug Administration approved nivolumab plus ipilimumab and two cycles of platinum-doublet chemotherapy for the frontline treatment of patients with metastatic or recurrent NSCLC with no EGFR or ALK genomic tumor aberrations.
Challenges to overcome
In the forest plots for OS, the 70 patients who were 75 years of age and older had inferior survival with the combination regimen, compared with chemotherapy alone.
Grade 3-4 treatment-related toxicity was reported in 47% of patients in the immunotherapy arm and 38% of those in the chemotherapy-alone arm.
With nivolumab-ipilimumab plus chemotherapy, more adverse events were considered serious (25.4% vs. 15%). Furthermore, grade 3-4 adverse events led to a higher rate of treatment discontinuation in the immunotherapy arm than in the chemotherapy-alone arm (16% vs. 5%).
Although cross-trial comparisons are treacherous, in CheckMate 227, only 12% of patients receiving nivolumab plus ipilimumab stopped treatment because of a grade 3-4 adverse event.
Better by design
In the updated analysis of CheckMate 227 (ASCO 2020, Abstract 9500), the nivolumab-ipilimumab regimen showed inferior OS results for the first 6 months of treatment, with more disease progression during that time. However, at 6 months, the OS curves crossed over to become consistently superior for the immunotherapy regimen thereafter.
Platinum-based chemotherapy is thought to augment antitumor immunity by inducing immunogenic cell death, increasing tumor neoantigen expression, and disturbing the immunosuppressive tumor microenvironment that prevents immune detection.
Therefore, CheckMate 9LA incorporated a short exposure to chemotherapy for the patients receiving nivolumab-ipilimumab in an effort to attain rapid disease control and retain the durable OS benefit that was seen with dual immunotherapy in CheckMate 227.
Indeed, in CheckMate 9LA, the Kaplan-Meier curves in both the initial and follow-up OS analyses diverged early in favor of the nivolumab-ipilimumab plus chemotherapy regimen and never crossed the curve for chemotherapy alone. Progressive disease was observed in fewer patients with the immunotherapy combination than with chemotherapy alone.
Longer follow-up needed
In recent years, a large number of treatment options for stage IV NSCLC patients have emerged. In the current report of CheckMate 9LA, the OS curve extended only to 27 months.
As was noted by invited discussant Benjamin Levy, MD, of Johns Hopkins University in Baltimore, it may be premature to put the regimen of two cycles of chemotherapy plus dual checkpoint/CTLA4 blockade in its proper context until follow-up extends for 3-5 years.
It would be ideal to know whether the tail of the OS curve will flatten out.
Do the best you can
Clinical investigators have a responsibility to retain the successes of prior regimens while overcoming the challenges of adverse events. New regimens also need to be practical when applied in general oncology practice.
In 2014, the American poet Maya Angelou advised, “Do the best you can until you know better. Then, when you know better, do better.” In many regards, the immunotherapy-chemotherapy combination tested in CheckMate 9LA appears to do better than preceding regimens.
Further refinements in dose, schedule, and supportive care, as well as real-time reporting of and response to patient-reported outcomes, will likely help us build on the CheckMate 9LA regimen and do even better.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
SOURCE: Reck M et al. ASCO 2020, Abstract 9501.
Data from the CheckMate 9LA study suggest the combination amplifies the rapid response expected from chemotherapy and the long-term benefit from immunotherapy. Furthermore, the very limited exposure to chemotherapy appears to mitigate long-term risks.
Martin Reck, MD, PhD, of LungenClinic Grosshansdorf in Germany, reported the data as part of the American Society of Clinical Oncology virtual scientific program (Abstract 9501).
A prior trial, CheckMate 227, demonstrated that nivolumab plus ipilimumab improved overall survival (OS) and durability of response in comparison with conventional chemotherapy in advanced NSCLC, regardless of PD-L1 expression (N Engl J Med 2019; 381:2020-31).
In CheckMate 9LA, researchers tested whether adding a limited course of chemotherapy – just two cycles – could improve outcomes further. Dr. Reck reported that, at the first preplanned interim analysis, the combination met its primary goal of improving OS as well as meeting multiple secondary endpoints.
Details of CheckMate 9LA
CheckMate 9LA included 719 treatment-naive patients with histologically confirmed stage IV or recurrent NSCLC and no known sensitizing alterations in EGFR or ALK. All patients had an Eastern Cooperative Oncology Group performance status of 0 or 1.
Patients received either nivolumab plus ipilimumab at standard NSCLC doses plus two cycles of chemotherapy or chemotherapy alone for four cycles.
The chemotherapy regimen was tailored by histology. Pemetrexed plus either cisplatin or carboplatin, with optional pemetrexed maintenance, was administered to patients with non-squamous histology. Paclitaxel plus carboplatin was chosen for patients with squamous disease.
If there was no disease progression or unacceptable toxicity, patients receiving nivolumab plus ipilimumab could continue immunotherapy for up to 2 years.
Patients were stratified by PD-L1 expression (< 1% vs. ≥ 1%), gender, and histology (squamous vs. non-squamous). Tumor and clinical characteristics were balanced across the trial arms.
The primary endpoint was OS, with secondary endpoints of progression-free survival, objective response rate by blinded independent central review, and efficacy by PD-L1 subgroups. Exploratory endpoints included safety/tolerability.
Results prompt FDA approval
Dr. Reck and colleagues found significantly better OS with nivolumab-ipilimumab plus chemotherapy, in comparison with chemotherapy alone (hazard ratio, 0.69; P = .0006).
With longer follow-up (minimum 12.7 months), nivolumab-ipilimumab plus chemotherapy continued to provide longer OS compared with chemotherapy alone. The median OS was 15.6 months and 10.9 months, respectively (HR, 0.66).
Despite more patients receiving subsequent systemic therapy in the chemotherapy-alone arm (34% of whom eventually received an immune checkpoint inhibitor), the immunotherapy-chemotherapy arm still yielded superior OS in the overall population.
One-year OS rates were 63% in the immunotherapy arm and 47% in the chemotherapy-alone arm.
Statistically significant improvements in progression-free survival and objective response rate were seen. The median response duration was 11.3 months in the immunotherapy arm and 5.6 months in the chemotherapy-alone arm.
Benefit was consistent by all efficacy measures and in all subgroups, including by PD-L1 expression and histology.
Based on the strength of these results, in May, the Food and Drug Administration approved nivolumab plus ipilimumab and two cycles of platinum-doublet chemotherapy for the frontline treatment of patients with metastatic or recurrent NSCLC with no EGFR or ALK genomic tumor aberrations.
Challenges to overcome
In the forest plots for OS, the 70 patients who were 75 years of age and older had inferior survival with the combination regimen, compared with chemotherapy alone.
Grade 3-4 treatment-related toxicity was reported in 47% of patients in the immunotherapy arm and 38% of those in the chemotherapy-alone arm.
With nivolumab-ipilimumab plus chemotherapy, more adverse events were considered serious (25.4% vs. 15%). Furthermore, grade 3-4 adverse events led to a higher rate of treatment discontinuation in the immunotherapy arm than in the chemotherapy-alone arm (16% vs. 5%).
Although cross-trial comparisons are treacherous, in CheckMate 227, only 12% of patients receiving nivolumab plus ipilimumab stopped treatment because of a grade 3-4 adverse event.
Better by design
In the updated analysis of CheckMate 227 (ASCO 2020, Abstract 9500), the nivolumab-ipilimumab regimen showed inferior OS results for the first 6 months of treatment, with more disease progression during that time. However, at 6 months, the OS curves crossed over to become consistently superior for the immunotherapy regimen thereafter.
Platinum-based chemotherapy is thought to augment antitumor immunity by inducing immunogenic cell death, increasing tumor neoantigen expression, and disturbing the immunosuppressive tumor microenvironment that prevents immune detection.
Therefore, CheckMate 9LA incorporated a short exposure to chemotherapy for the patients receiving nivolumab-ipilimumab in an effort to attain rapid disease control and retain the durable OS benefit that was seen with dual immunotherapy in CheckMate 227.
Indeed, in CheckMate 9LA, the Kaplan-Meier curves in both the initial and follow-up OS analyses diverged early in favor of the nivolumab-ipilimumab plus chemotherapy regimen and never crossed the curve for chemotherapy alone. Progressive disease was observed in fewer patients with the immunotherapy combination than with chemotherapy alone.
Longer follow-up needed
In recent years, a large number of treatment options for stage IV NSCLC patients have emerged. In the current report of CheckMate 9LA, the OS curve extended only to 27 months.
As was noted by invited discussant Benjamin Levy, MD, of Johns Hopkins University in Baltimore, it may be premature to put the regimen of two cycles of chemotherapy plus dual checkpoint/CTLA4 blockade in its proper context until follow-up extends for 3-5 years.
It would be ideal to know whether the tail of the OS curve will flatten out.
Do the best you can
Clinical investigators have a responsibility to retain the successes of prior regimens while overcoming the challenges of adverse events. New regimens also need to be practical when applied in general oncology practice.
In 2014, the American poet Maya Angelou advised, “Do the best you can until you know better. Then, when you know better, do better.” In many regards, the immunotherapy-chemotherapy combination tested in CheckMate 9LA appears to do better than preceding regimens.
Further refinements in dose, schedule, and supportive care, as well as real-time reporting of and response to patient-reported outcomes, will likely help us build on the CheckMate 9LA regimen and do even better.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
SOURCE: Reck M et al. ASCO 2020, Abstract 9501.
Data from the CheckMate 9LA study suggest the combination amplifies the rapid response expected from chemotherapy and the long-term benefit from immunotherapy. Furthermore, the very limited exposure to chemotherapy appears to mitigate long-term risks.
Martin Reck, MD, PhD, of LungenClinic Grosshansdorf in Germany, reported the data as part of the American Society of Clinical Oncology virtual scientific program (Abstract 9501).
A prior trial, CheckMate 227, demonstrated that nivolumab plus ipilimumab improved overall survival (OS) and durability of response in comparison with conventional chemotherapy in advanced NSCLC, regardless of PD-L1 expression (N Engl J Med 2019; 381:2020-31).
In CheckMate 9LA, researchers tested whether adding a limited course of chemotherapy – just two cycles – could improve outcomes further. Dr. Reck reported that, at the first preplanned interim analysis, the combination met its primary goal of improving OS as well as meeting multiple secondary endpoints.
Details of CheckMate 9LA
CheckMate 9LA included 719 treatment-naive patients with histologically confirmed stage IV or recurrent NSCLC and no known sensitizing alterations in EGFR or ALK. All patients had an Eastern Cooperative Oncology Group performance status of 0 or 1.
Patients received either nivolumab plus ipilimumab at standard NSCLC doses plus two cycles of chemotherapy or chemotherapy alone for four cycles.
The chemotherapy regimen was tailored by histology. Pemetrexed plus either cisplatin or carboplatin, with optional pemetrexed maintenance, was administered to patients with non-squamous histology. Paclitaxel plus carboplatin was chosen for patients with squamous disease.
If there was no disease progression or unacceptable toxicity, patients receiving nivolumab plus ipilimumab could continue immunotherapy for up to 2 years.
Patients were stratified by PD-L1 expression (< 1% vs. ≥ 1%), gender, and histology (squamous vs. non-squamous). Tumor and clinical characteristics were balanced across the trial arms.
The primary endpoint was OS, with secondary endpoints of progression-free survival, objective response rate by blinded independent central review, and efficacy by PD-L1 subgroups. Exploratory endpoints included safety/tolerability.
Results prompt FDA approval
Dr. Reck and colleagues found significantly better OS with nivolumab-ipilimumab plus chemotherapy, in comparison with chemotherapy alone (hazard ratio, 0.69; P = .0006).
With longer follow-up (minimum 12.7 months), nivolumab-ipilimumab plus chemotherapy continued to provide longer OS compared with chemotherapy alone. The median OS was 15.6 months and 10.9 months, respectively (HR, 0.66).
Despite more patients receiving subsequent systemic therapy in the chemotherapy-alone arm (34% of whom eventually received an immune checkpoint inhibitor), the immunotherapy-chemotherapy arm still yielded superior OS in the overall population.
One-year OS rates were 63% in the immunotherapy arm and 47% in the chemotherapy-alone arm.
Statistically significant improvements in progression-free survival and objective response rate were seen. The median response duration was 11.3 months in the immunotherapy arm and 5.6 months in the chemotherapy-alone arm.
Benefit was consistent by all efficacy measures and in all subgroups, including by PD-L1 expression and histology.
Based on the strength of these results, in May, the Food and Drug Administration approved nivolumab plus ipilimumab and two cycles of platinum-doublet chemotherapy for the frontline treatment of patients with metastatic or recurrent NSCLC with no EGFR or ALK genomic tumor aberrations.
Challenges to overcome
In the forest plots for OS, the 70 patients who were 75 years of age and older had inferior survival with the combination regimen, compared with chemotherapy alone.
Grade 3-4 treatment-related toxicity was reported in 47% of patients in the immunotherapy arm and 38% of those in the chemotherapy-alone arm.
With nivolumab-ipilimumab plus chemotherapy, more adverse events were considered serious (25.4% vs. 15%). Furthermore, grade 3-4 adverse events led to a higher rate of treatment discontinuation in the immunotherapy arm than in the chemotherapy-alone arm (16% vs. 5%).
Although cross-trial comparisons are treacherous, in CheckMate 227, only 12% of patients receiving nivolumab plus ipilimumab stopped treatment because of a grade 3-4 adverse event.
Better by design
In the updated analysis of CheckMate 227 (ASCO 2020, Abstract 9500), the nivolumab-ipilimumab regimen showed inferior OS results for the first 6 months of treatment, with more disease progression during that time. However, at 6 months, the OS curves crossed over to become consistently superior for the immunotherapy regimen thereafter.
Platinum-based chemotherapy is thought to augment antitumor immunity by inducing immunogenic cell death, increasing tumor neoantigen expression, and disturbing the immunosuppressive tumor microenvironment that prevents immune detection.
Therefore, CheckMate 9LA incorporated a short exposure to chemotherapy for the patients receiving nivolumab-ipilimumab in an effort to attain rapid disease control and retain the durable OS benefit that was seen with dual immunotherapy in CheckMate 227.
Indeed, in CheckMate 9LA, the Kaplan-Meier curves in both the initial and follow-up OS analyses diverged early in favor of the nivolumab-ipilimumab plus chemotherapy regimen and never crossed the curve for chemotherapy alone. Progressive disease was observed in fewer patients with the immunotherapy combination than with chemotherapy alone.
Longer follow-up needed
In recent years, a large number of treatment options for stage IV NSCLC patients have emerged. In the current report of CheckMate 9LA, the OS curve extended only to 27 months.
As was noted by invited discussant Benjamin Levy, MD, of Johns Hopkins University in Baltimore, it may be premature to put the regimen of two cycles of chemotherapy plus dual checkpoint/CTLA4 blockade in its proper context until follow-up extends for 3-5 years.
It would be ideal to know whether the tail of the OS curve will flatten out.
Do the best you can
Clinical investigators have a responsibility to retain the successes of prior regimens while overcoming the challenges of adverse events. New regimens also need to be practical when applied in general oncology practice.
In 2014, the American poet Maya Angelou advised, “Do the best you can until you know better. Then, when you know better, do better.” In many regards, the immunotherapy-chemotherapy combination tested in CheckMate 9LA appears to do better than preceding regimens.
Further refinements in dose, schedule, and supportive care, as well as real-time reporting of and response to patient-reported outcomes, will likely help us build on the CheckMate 9LA regimen and do even better.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
SOURCE: Reck M et al. ASCO 2020, Abstract 9501.
FROM ASCO 2020
‘Hospital at home’ cuts ED visits and costs for cancer patients
Visits to the emergency department (ED) and hospitalizations are often frequent occurrences for cancer patients, but what if the “hospital” could be brought into the home instead?
A new American cohort study provides evidence that this can be a workable option for cancer patients. The authors report improved patient outcomes, with 56% lower odds of unplanned hospitalizations (P = .001), 45% lower odds of ED visits (P = .037), and 50% lower cumulative charges (P = .001), as compared with patients who received usual care.
“The oncology hospital-at-home model of care that extends acute-level care to the patient at home offers promise in addressing a long-term gap in cancer care service delivery,” said lead author Kathi Mooney, PhD, RN, interim senior director of population sciences at the Huntsman Cancer Institute and distinguished professor of nursing at the University of Utah, Salt Lake City. “In light of the current global pandemic, we are compelled to consider new ways to provide cancer care, and the oncology hospital-at-home model is on point to address critical elements of an improved cancer care delivery system.”
Mooney presented the findings during the virtual scientific program of the American Society of Clinical Oncology 2020 annual meeting (abstract 7000).
The hospital-at-home model of care provides hospital-level care in the comfort of the patient’s home and is a component of many healthcare systems worldwide. Although it was introduced in the United States more than 2 decades ago, it has not been widely adopted or studied specifically in oncology.
Most cancer treatment is provided on an outpatient basis, which means that patients experience significant adverse events, toxicities, and disease progression while they are at home. Thus, Mooney noted, patients tend to rely heavily on the ED and sometimes experience unplanned hospitalizations and 30-day readmissions.
“These care patterns are distressing to the patients and their families and tax healthcare resources,” she said. “They are even more concerning and salient as we endeavor to protect cancer patients and provide cancer care during a pandemic.”
Currently, strategies to evaluate and support cancer patients and caregivers at home are limited. In 2018, the Huntsman Cancer Institute implemented Huntsman at Home, a demonstration project to evaluate the utility of an oncology hospital-at-home model.
Significantly Fewer Unplanned Hospitalizations
Huntsman at Home is run by nurse practitioner and registered nurse teams who deliver acute-level care at home. Physicians provide backup support for both medical oncology and palliative care. Nurse practitioners also work directly with the patient’s oncology team to coordinate care needs, including services such as social work and physical therapy.
To evaluate the hospital-at-home model, Mooney and colleagues compared patients who were enrolled in the program with those who received usual care. The usual-care comparison group was drawn from patients who lived in the Salt Lake City area. These patients would have qualified for enrollment in the Huntsman at Home program, but they lived outside the 20-mile service area.
The cohort included 367 patients (169 Huntsman at Home patients and 198 usual-care patients). Of those patients, 77% had stage IV cancer. A range of cancer types was represented; the most common were colon, gynecologic, prostate, and lung cancers. As compared to the usual-care group, those in the home model were more likely to be women (61% vs 43%).
During the first 30 days after admission, Huntsman at Home patients had significantly fewer unplanned hospitalizations (19.5% vs 35.4%) and a shorter length of stay (1.4 vs 2.6 days). Their care was also less expensive. The estimated charges for the hospital-at-home patients was $10,238, compared with $21,363 for the usual-care patients. There was no real difference in stays in the intensive care unit between the two groups.
Mooney noted that since there have been few studies of the hospital-at-home model for oncology patients, the investigators’ initial focus was on patients at hospital discharge who needed continued acute-level care and those who had acute problems identified through their oncology care clinic. Therefore, patients were not admitted to the program directly from emergency services, and chemotherapy infusions were not provided, although these are “other areas to consider in an oncology hospital-at-home model.”
Other limitations of the study were that it was not a randomized trial, and the evaluation was from a single program located at one comprehensive cancer center.
“These findings provide the oncology community with an opportunity to rethink cancer care as solely hospital- and clinic-based and instead reimagine care delivery that moves with the patient with key components provided at home,” said Mooney. “We plan to continue the development and evaluation of Huntsman at Home and extend care to admission from the emergency department.”
She added that, together with Flatiron Health, they are validating a tool to prospectively predict, on the basis of the likelihood of ED use, which patients may benefit from Huntsman at Home support. They also plan to extend care to patients who live at a distance from the cancer center and in rural communities, and may include chemotherapy infusion services.
Palliative Care Patients Prefer Home-Based Treatment
In a discussion of the paper, Lynne Wagner, PhD, a professor in the Department of Social Sciences and Health Policy with the Wake Forest School of Medicine, Winston-Salem, North Carolina, and a member of the Wake Forest Baptist Comprehensive Cancer Center, explained that some “aspects of healthcare are more translatable to a virtual or alternative delivery model than others. An area of cancer care greatly in need of innovation and quality improvement pertains to the management of oncologic emergencies.”
She pointed out that optimal care for oncologic emergencies requires the “intersection of oncology and emergency medicine specialists,” but there are often no well-defined processes for care coordination in place.
“Emergency department utilization could be reduced through greater precision with regard to risk stratification and early intervention and improved outpatient management, including improved symptom management,” said Wagner.
Wagner suggested that research should incorporate patient-reported outcomes so as to measure patient-centered benefits of home-based care. “Patients who are receiving palliative care services prefer home-based care, and it’s reasonable to anticipate this finding would extrapolate to the investigator’s target population,” she said. “However, there may also be unanticipated consequences, potentially including increased anxiety or increased burden on caretakers.”
In addition, the tangible and intangible costs associated with traveling to receive healthcare services and time away from work can be reduced with home-based care, and this should also be quantified. “The costs associated with COVID infection should be estimated to realize the full economic value of this care model, given significant reductions in cohort exposure afforded by home-based visits,” Wagner added.
The Huntsman at Home program is funded by the Huntsman Cancer Institute. The evaluation was funded by the Cambia Health Foundation. Mooney has a consulting or advisory role with Cognitive Medical System, Inc, and has patents, royalties, and other intellectual property for the development of Symptom Care at Home, a remote symptom-monitoring platform developed through research grants funded by the National Cancer Institute. No royalties have been received to date. Wagner has relationships with Celgene, Eli Lilly, Gilead Sciences, and Johnson & Johnson.
This article first appeared on Medscape.com.
Visits to the emergency department (ED) and hospitalizations are often frequent occurrences for cancer patients, but what if the “hospital” could be brought into the home instead?
A new American cohort study provides evidence that this can be a workable option for cancer patients. The authors report improved patient outcomes, with 56% lower odds of unplanned hospitalizations (P = .001), 45% lower odds of ED visits (P = .037), and 50% lower cumulative charges (P = .001), as compared with patients who received usual care.
“The oncology hospital-at-home model of care that extends acute-level care to the patient at home offers promise in addressing a long-term gap in cancer care service delivery,” said lead author Kathi Mooney, PhD, RN, interim senior director of population sciences at the Huntsman Cancer Institute and distinguished professor of nursing at the University of Utah, Salt Lake City. “In light of the current global pandemic, we are compelled to consider new ways to provide cancer care, and the oncology hospital-at-home model is on point to address critical elements of an improved cancer care delivery system.”
Mooney presented the findings during the virtual scientific program of the American Society of Clinical Oncology 2020 annual meeting (abstract 7000).
The hospital-at-home model of care provides hospital-level care in the comfort of the patient’s home and is a component of many healthcare systems worldwide. Although it was introduced in the United States more than 2 decades ago, it has not been widely adopted or studied specifically in oncology.
Most cancer treatment is provided on an outpatient basis, which means that patients experience significant adverse events, toxicities, and disease progression while they are at home. Thus, Mooney noted, patients tend to rely heavily on the ED and sometimes experience unplanned hospitalizations and 30-day readmissions.
“These care patterns are distressing to the patients and their families and tax healthcare resources,” she said. “They are even more concerning and salient as we endeavor to protect cancer patients and provide cancer care during a pandemic.”
Currently, strategies to evaluate and support cancer patients and caregivers at home are limited. In 2018, the Huntsman Cancer Institute implemented Huntsman at Home, a demonstration project to evaluate the utility of an oncology hospital-at-home model.
Significantly Fewer Unplanned Hospitalizations
Huntsman at Home is run by nurse practitioner and registered nurse teams who deliver acute-level care at home. Physicians provide backup support for both medical oncology and palliative care. Nurse practitioners also work directly with the patient’s oncology team to coordinate care needs, including services such as social work and physical therapy.
To evaluate the hospital-at-home model, Mooney and colleagues compared patients who were enrolled in the program with those who received usual care. The usual-care comparison group was drawn from patients who lived in the Salt Lake City area. These patients would have qualified for enrollment in the Huntsman at Home program, but they lived outside the 20-mile service area.
The cohort included 367 patients (169 Huntsman at Home patients and 198 usual-care patients). Of those patients, 77% had stage IV cancer. A range of cancer types was represented; the most common were colon, gynecologic, prostate, and lung cancers. As compared to the usual-care group, those in the home model were more likely to be women (61% vs 43%).
During the first 30 days after admission, Huntsman at Home patients had significantly fewer unplanned hospitalizations (19.5% vs 35.4%) and a shorter length of stay (1.4 vs 2.6 days). Their care was also less expensive. The estimated charges for the hospital-at-home patients was $10,238, compared with $21,363 for the usual-care patients. There was no real difference in stays in the intensive care unit between the two groups.
Mooney noted that since there have been few studies of the hospital-at-home model for oncology patients, the investigators’ initial focus was on patients at hospital discharge who needed continued acute-level care and those who had acute problems identified through their oncology care clinic. Therefore, patients were not admitted to the program directly from emergency services, and chemotherapy infusions were not provided, although these are “other areas to consider in an oncology hospital-at-home model.”
Other limitations of the study were that it was not a randomized trial, and the evaluation was from a single program located at one comprehensive cancer center.
“These findings provide the oncology community with an opportunity to rethink cancer care as solely hospital- and clinic-based and instead reimagine care delivery that moves with the patient with key components provided at home,” said Mooney. “We plan to continue the development and evaluation of Huntsman at Home and extend care to admission from the emergency department.”
She added that, together with Flatiron Health, they are validating a tool to prospectively predict, on the basis of the likelihood of ED use, which patients may benefit from Huntsman at Home support. They also plan to extend care to patients who live at a distance from the cancer center and in rural communities, and may include chemotherapy infusion services.
Palliative Care Patients Prefer Home-Based Treatment
In a discussion of the paper, Lynne Wagner, PhD, a professor in the Department of Social Sciences and Health Policy with the Wake Forest School of Medicine, Winston-Salem, North Carolina, and a member of the Wake Forest Baptist Comprehensive Cancer Center, explained that some “aspects of healthcare are more translatable to a virtual or alternative delivery model than others. An area of cancer care greatly in need of innovation and quality improvement pertains to the management of oncologic emergencies.”
She pointed out that optimal care for oncologic emergencies requires the “intersection of oncology and emergency medicine specialists,” but there are often no well-defined processes for care coordination in place.
“Emergency department utilization could be reduced through greater precision with regard to risk stratification and early intervention and improved outpatient management, including improved symptom management,” said Wagner.
Wagner suggested that research should incorporate patient-reported outcomes so as to measure patient-centered benefits of home-based care. “Patients who are receiving palliative care services prefer home-based care, and it’s reasonable to anticipate this finding would extrapolate to the investigator’s target population,” she said. “However, there may also be unanticipated consequences, potentially including increased anxiety or increased burden on caretakers.”
In addition, the tangible and intangible costs associated with traveling to receive healthcare services and time away from work can be reduced with home-based care, and this should also be quantified. “The costs associated with COVID infection should be estimated to realize the full economic value of this care model, given significant reductions in cohort exposure afforded by home-based visits,” Wagner added.
The Huntsman at Home program is funded by the Huntsman Cancer Institute. The evaluation was funded by the Cambia Health Foundation. Mooney has a consulting or advisory role with Cognitive Medical System, Inc, and has patents, royalties, and other intellectual property for the development of Symptom Care at Home, a remote symptom-monitoring platform developed through research grants funded by the National Cancer Institute. No royalties have been received to date. Wagner has relationships with Celgene, Eli Lilly, Gilead Sciences, and Johnson & Johnson.
This article first appeared on Medscape.com.
Visits to the emergency department (ED) and hospitalizations are often frequent occurrences for cancer patients, but what if the “hospital” could be brought into the home instead?
A new American cohort study provides evidence that this can be a workable option for cancer patients. The authors report improved patient outcomes, with 56% lower odds of unplanned hospitalizations (P = .001), 45% lower odds of ED visits (P = .037), and 50% lower cumulative charges (P = .001), as compared with patients who received usual care.
“The oncology hospital-at-home model of care that extends acute-level care to the patient at home offers promise in addressing a long-term gap in cancer care service delivery,” said lead author Kathi Mooney, PhD, RN, interim senior director of population sciences at the Huntsman Cancer Institute and distinguished professor of nursing at the University of Utah, Salt Lake City. “In light of the current global pandemic, we are compelled to consider new ways to provide cancer care, and the oncology hospital-at-home model is on point to address critical elements of an improved cancer care delivery system.”
Mooney presented the findings during the virtual scientific program of the American Society of Clinical Oncology 2020 annual meeting (abstract 7000).
The hospital-at-home model of care provides hospital-level care in the comfort of the patient’s home and is a component of many healthcare systems worldwide. Although it was introduced in the United States more than 2 decades ago, it has not been widely adopted or studied specifically in oncology.
Most cancer treatment is provided on an outpatient basis, which means that patients experience significant adverse events, toxicities, and disease progression while they are at home. Thus, Mooney noted, patients tend to rely heavily on the ED and sometimes experience unplanned hospitalizations and 30-day readmissions.
“These care patterns are distressing to the patients and their families and tax healthcare resources,” she said. “They are even more concerning and salient as we endeavor to protect cancer patients and provide cancer care during a pandemic.”
Currently, strategies to evaluate and support cancer patients and caregivers at home are limited. In 2018, the Huntsman Cancer Institute implemented Huntsman at Home, a demonstration project to evaluate the utility of an oncology hospital-at-home model.
Significantly Fewer Unplanned Hospitalizations
Huntsman at Home is run by nurse practitioner and registered nurse teams who deliver acute-level care at home. Physicians provide backup support for both medical oncology and palliative care. Nurse practitioners also work directly with the patient’s oncology team to coordinate care needs, including services such as social work and physical therapy.
To evaluate the hospital-at-home model, Mooney and colleagues compared patients who were enrolled in the program with those who received usual care. The usual-care comparison group was drawn from patients who lived in the Salt Lake City area. These patients would have qualified for enrollment in the Huntsman at Home program, but they lived outside the 20-mile service area.
The cohort included 367 patients (169 Huntsman at Home patients and 198 usual-care patients). Of those patients, 77% had stage IV cancer. A range of cancer types was represented; the most common were colon, gynecologic, prostate, and lung cancers. As compared to the usual-care group, those in the home model were more likely to be women (61% vs 43%).
During the first 30 days after admission, Huntsman at Home patients had significantly fewer unplanned hospitalizations (19.5% vs 35.4%) and a shorter length of stay (1.4 vs 2.6 days). Their care was also less expensive. The estimated charges for the hospital-at-home patients was $10,238, compared with $21,363 for the usual-care patients. There was no real difference in stays in the intensive care unit between the two groups.
Mooney noted that since there have been few studies of the hospital-at-home model for oncology patients, the investigators’ initial focus was on patients at hospital discharge who needed continued acute-level care and those who had acute problems identified through their oncology care clinic. Therefore, patients were not admitted to the program directly from emergency services, and chemotherapy infusions were not provided, although these are “other areas to consider in an oncology hospital-at-home model.”
Other limitations of the study were that it was not a randomized trial, and the evaluation was from a single program located at one comprehensive cancer center.
“These findings provide the oncology community with an opportunity to rethink cancer care as solely hospital- and clinic-based and instead reimagine care delivery that moves with the patient with key components provided at home,” said Mooney. “We plan to continue the development and evaluation of Huntsman at Home and extend care to admission from the emergency department.”
She added that, together with Flatiron Health, they are validating a tool to prospectively predict, on the basis of the likelihood of ED use, which patients may benefit from Huntsman at Home support. They also plan to extend care to patients who live at a distance from the cancer center and in rural communities, and may include chemotherapy infusion services.
Palliative Care Patients Prefer Home-Based Treatment
In a discussion of the paper, Lynne Wagner, PhD, a professor in the Department of Social Sciences and Health Policy with the Wake Forest School of Medicine, Winston-Salem, North Carolina, and a member of the Wake Forest Baptist Comprehensive Cancer Center, explained that some “aspects of healthcare are more translatable to a virtual or alternative delivery model than others. An area of cancer care greatly in need of innovation and quality improvement pertains to the management of oncologic emergencies.”
She pointed out that optimal care for oncologic emergencies requires the “intersection of oncology and emergency medicine specialists,” but there are often no well-defined processes for care coordination in place.
“Emergency department utilization could be reduced through greater precision with regard to risk stratification and early intervention and improved outpatient management, including improved symptom management,” said Wagner.
Wagner suggested that research should incorporate patient-reported outcomes so as to measure patient-centered benefits of home-based care. “Patients who are receiving palliative care services prefer home-based care, and it’s reasonable to anticipate this finding would extrapolate to the investigator’s target population,” she said. “However, there may also be unanticipated consequences, potentially including increased anxiety or increased burden on caretakers.”
In addition, the tangible and intangible costs associated with traveling to receive healthcare services and time away from work can be reduced with home-based care, and this should also be quantified. “The costs associated with COVID infection should be estimated to realize the full economic value of this care model, given significant reductions in cohort exposure afforded by home-based visits,” Wagner added.
The Huntsman at Home program is funded by the Huntsman Cancer Institute. The evaluation was funded by the Cambia Health Foundation. Mooney has a consulting or advisory role with Cognitive Medical System, Inc, and has patents, royalties, and other intellectual property for the development of Symptom Care at Home, a remote symptom-monitoring platform developed through research grants funded by the National Cancer Institute. No royalties have been received to date. Wagner has relationships with Celgene, Eli Lilly, Gilead Sciences, and Johnson & Johnson.
This article first appeared on Medscape.com.
FROM ASCO 2020
No OS benefit with gefitinib vs. chemo for EGFR+ NSCLC
The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.
Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.
Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.
He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”
The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
Study details and DFS
The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.
The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m2 of vinorelbine on days 1 and 8 plus 75 mg/m2 of cisplatin on day 1 every 3 weeks for 4 cycles.
The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.
Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.
The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.
In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.
OS results
The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).
In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.
Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.
The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.
The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.
The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
Implications and potential next steps
Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.
“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.
An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.
Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.
Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.
The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.
SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.
The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.
Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.
Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.
He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”
The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
Study details and DFS
The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.
The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m2 of vinorelbine on days 1 and 8 plus 75 mg/m2 of cisplatin on day 1 every 3 weeks for 4 cycles.
The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.
Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.
The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.
In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.
OS results
The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).
In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.
Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.
The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.
The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.
The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
Implications and potential next steps
Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.
“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.
An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.
Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.
Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.
The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.
SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.
The median OS was 75.5 months in patients randomized to adjuvant gefitinib and 62.8 months in patients randomized to vinorelbine plus cisplatin.
Yi-Long Wu, MD, of Guangdong Lung Cancer Institute in Guangzhou, China, reported these results as part of the American Society of Clinical Oncology virtual scientific program.
Prior results from this trial had shown a disease-free survival (DFS) benefit with gefitinib, but this did not translate to an OS benefit at the final analysis, Dr. Wu said.
He noted, however, that the median OS of 75.5 months in the gefitinib arm “was one of the best in resected EGFR-mutant non–small cell lung cancer, compared with historical data.”
The findings also suggest a possible benefit with at least 18 months of gefitinib and show that adjuvant EGFR tyrosine kinase inhibitors (TKIs) should be considered the optimal therapy to improve DFS and achieve potentially better OS in this setting, Dr. Wu said.
Study details and DFS
The ADJUVANT trial (NCT01405079) randomized 222 patients, aged 18-75 years, with EGFR-mutant, stage II-IIIA (N1-N2) NSCLC who had undergone complete resection. Patients were enrolled at 27 sites between September 2011 and April 2014.
The patients were randomized 1:1 to receive 250 mg of gefitinib once daily for 24 months, or 25 mg/m2 of vinorelbine on days 1 and 8 plus 75 mg/m2 of cisplatin on day 1 every 3 weeks for 4 cycles.
The intent-to-treat (ITT) population included 111 patients in each arm. The per-protocol population included 106 patients in the gefitinib arm and 87 patients in the chemotherapy arm.
Primary results from this trial showed a significant improvement in DFS with gefitinib (Lancet Oncol. 2018 Jan;19[1]:139-48). That improvement was maintained in the final analysis.
The median DFS was 30.8 months in the gefitinib arm and 19.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The hazard ratio (HR) was 0.56 (P = .001) in the ITT population and 0.51 (P < .001) in the per-protocol population.
In the ITT population, the 5-year DFS rates were 22.6% in the gefitinib arm and 23.2% in the chemotherapy arm. In the per-protocol population, the 5-year DFS rates were 22.6% and 22.8%, respectively.
OS results
The median OS was 75.5 months in the gefitinib arm and 62.8 months in the chemotherapy arm for both the ITT and per-protocol populations. The HR was 0.92 in both the ITT (P = .674) and per-protocol populations (P = .686).
In the ITT population, the 5-year OS rates were 53.2% in the gefitinib arm and 51.2% in the chemotherapy arm. In the per-protocol population, the 5-year OS rates were 53.2% and 50.7%, respectively.
Subgroup analyses by age, gender, lymph node status, and EGFR mutation showed trends toward improved OS with gefitinib, but the differences were not statistically significant.
The researchers conducted a post hoc analysis to assess the effect of subsequent treatment on patient outcomes. The analysis showed that patients who received gefitinib with subsequent EGFR-TKIs had the best responses and OS.
The median OS was not reached among patients who received gefitinib and subsequent EGFR-TKIs, whereas the median OS ranged from 15.6 months to 62.8 months in other groups. The shortest OS was observed in patients who received adjuvant chemotherapy without subsequent therapy.
The duration of gefitinib treatment also appeared to affect OS. The median OS was 35.7 months in patients who received gefitinib for less than 18 months, and the median OS was not reached in patients who received gefitinib for 18 months or longer (HR, 0.38; P < .001).
Implications and potential next steps
Despite the lack of OS improvement with gefitinib, “all of the patients on this study did much, much better than historical non–small cell lung cancer not specified by the EGFR mutation, with 70 months median survival compared to 35 months median survival for N2-positive disease,” said invited discussant Christopher G. Azzoli, MD, director of thoracic oncology at Lifespan Cancer Institute at Brown University in Providence, R.I.
“But you can’t avoid noticing how the curves come back together in terms of disease-free survival when your effective treatment is limited to 24 months,” he added.
An apparent risk of late brain recurrence in the gefitinib arm is also a concern, Dr. Azzoli said. “So ... longer duration of treatment with a drug that has better control of CNS [central nervous system] disease, such as osimertinib, may improve both DFS and OS,” he added.
Only about 50% of patients in the chemotherapy arm received a TKI at recurrence. The post hoc analysis showing that TKI recipients had the best outcomes raises the question of whether “the survival benefit could be conferred by delivering a superior drug merely at recurrence, or is there benefit to earlier delivery of an effective drug,” Dr. Azzoli said.
Given the high cost of continuous therapy, biomarker refinement could help improve treatment decision-making, he said, noting that “early testing of blood DNA to detect cancer in the body as minimal residual disease is showing promise,” and that many phase 3 studies of EGFR-TKIs are ongoing.
The current trial was sponsored by the Guangdong Association of Clinical Trials. Dr. Wu disclosed relationships with AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb/China, Lilly, MSD Oncology, Pfizer, and Roche. Dr. Azzoli reported having no disclosures.
SOURCE: Wu Y et al. ASCO 2020, Abstract 9005.
FROM ASCO 2020
Tepotinib elicits responses in METex14 NSCLC
The objective response rate was 46.5% among the 99 patients followed for 9 or more months, as assessed by independent reviewers. There were no complete responders, according to the reviewers.
However, the response rate according to investigator assessment was 55.6%, including two responses that were judged to be complete.
The median duration of response was 11.1 months according to reviewers and 14 months according to investigators.
“The success of this trial, alongside other studies on the same class of drugs, establishes MET exon 14 as an actionable target for non–small cell lung cancer,” said senior author Xiuning Le, MD, PhD, assistant professor in the department of thoracic/head and neck medical oncology at the University of Texas MD Anderson Cancer Center, Houston.
Dr. Le presented results from this trial as part of the American Society of Clinical Oncology virtual scientific program. Results were published simultaneously in the New England Journal of Medicine.
The trial, dubbed VISION, already won tepotinib approval in Japan to treat NSCLC patients with MET exon 14–skipping mutations. The Food and Drug Administration has granted tepotinib breakthrough status, and Merck, the drug’s manufacturer, plans to submit tepotinib for review this year.
The VISION trial enrolled 152 patients with NSCLC – 99 with at least 9 months of follow-up and 53 with shorter follow-up. The patients’ MET exon 14 mutations were confirmed by liquid or tissue biopsy.
The patients’ median age at baseline was 74 years, 54% were men, and almost half had no smoking history. Patients received tepotinib at 500 mg daily until disease progression or intolerable toxicity.
Overall, the VISION results “compare favorably” with those from studies of other MET inhibitors, the investigators wrote.
The 46.5% objective response rate (per independent reviewers) included the 99 patients with follow-up of at least 9 months who were liquid- or tissue-biopsy positive (combined group). The response rate was 48.5% among the 66 patients with positive liquid biopsies and 50% among the 60 patients with positive tissue biopsies.
The median progression-free survival was 8.5 months in the combined group, 8.5 months in the liquid-biopsy group, and 11 months in the tissue-biopsy group. The median overall survival was 17.1 months, 15.8 months, and 22.3 months, respectively.
The 11 patients with brain metastases at baseline had results that were in line with the other patients’ results. Patients with brain metastases had an objective response rate of 54.5%, a median response duration of 9.5 months, and a median progression-free survival of 10.9 months.
Overall, 88.8% of patients reported adverse events related to treatment, including peripheral edema in 63.2%, nausea in 25.7%, and diarrhea in 21.7%.
Grade 3-4 adverse events occurred in 27% of patients. Peripheral edema was the most common of these events, reported in 7.2% of patients.
“Proactive monitoring for peripheral edema is recommended and can be managed with temporary discontinuation of tepotinib or dose reduction,” the investigators wrote.
The death of a 79-year-old patient with respiratory failure and dyspnea, secondary to interstitial lung disease, was the only death considered to be treatment related.
The study was funded by Merck. Dr. Le and other investigators disclosed relationships, including employment, with the company.
SOURCE: Le X et al. ASCO 2020, Abstract 9556.
The objective response rate was 46.5% among the 99 patients followed for 9 or more months, as assessed by independent reviewers. There were no complete responders, according to the reviewers.
However, the response rate according to investigator assessment was 55.6%, including two responses that were judged to be complete.
The median duration of response was 11.1 months according to reviewers and 14 months according to investigators.
“The success of this trial, alongside other studies on the same class of drugs, establishes MET exon 14 as an actionable target for non–small cell lung cancer,” said senior author Xiuning Le, MD, PhD, assistant professor in the department of thoracic/head and neck medical oncology at the University of Texas MD Anderson Cancer Center, Houston.
Dr. Le presented results from this trial as part of the American Society of Clinical Oncology virtual scientific program. Results were published simultaneously in the New England Journal of Medicine.
The trial, dubbed VISION, already won tepotinib approval in Japan to treat NSCLC patients with MET exon 14–skipping mutations. The Food and Drug Administration has granted tepotinib breakthrough status, and Merck, the drug’s manufacturer, plans to submit tepotinib for review this year.
The VISION trial enrolled 152 patients with NSCLC – 99 with at least 9 months of follow-up and 53 with shorter follow-up. The patients’ MET exon 14 mutations were confirmed by liquid or tissue biopsy.
The patients’ median age at baseline was 74 years, 54% were men, and almost half had no smoking history. Patients received tepotinib at 500 mg daily until disease progression or intolerable toxicity.
Overall, the VISION results “compare favorably” with those from studies of other MET inhibitors, the investigators wrote.
The 46.5% objective response rate (per independent reviewers) included the 99 patients with follow-up of at least 9 months who were liquid- or tissue-biopsy positive (combined group). The response rate was 48.5% among the 66 patients with positive liquid biopsies and 50% among the 60 patients with positive tissue biopsies.
The median progression-free survival was 8.5 months in the combined group, 8.5 months in the liquid-biopsy group, and 11 months in the tissue-biopsy group. The median overall survival was 17.1 months, 15.8 months, and 22.3 months, respectively.
The 11 patients with brain metastases at baseline had results that were in line with the other patients’ results. Patients with brain metastases had an objective response rate of 54.5%, a median response duration of 9.5 months, and a median progression-free survival of 10.9 months.
Overall, 88.8% of patients reported adverse events related to treatment, including peripheral edema in 63.2%, nausea in 25.7%, and diarrhea in 21.7%.
Grade 3-4 adverse events occurred in 27% of patients. Peripheral edema was the most common of these events, reported in 7.2% of patients.
“Proactive monitoring for peripheral edema is recommended and can be managed with temporary discontinuation of tepotinib or dose reduction,” the investigators wrote.
The death of a 79-year-old patient with respiratory failure and dyspnea, secondary to interstitial lung disease, was the only death considered to be treatment related.
The study was funded by Merck. Dr. Le and other investigators disclosed relationships, including employment, with the company.
SOURCE: Le X et al. ASCO 2020, Abstract 9556.
The objective response rate was 46.5% among the 99 patients followed for 9 or more months, as assessed by independent reviewers. There were no complete responders, according to the reviewers.
However, the response rate according to investigator assessment was 55.6%, including two responses that were judged to be complete.
The median duration of response was 11.1 months according to reviewers and 14 months according to investigators.
“The success of this trial, alongside other studies on the same class of drugs, establishes MET exon 14 as an actionable target for non–small cell lung cancer,” said senior author Xiuning Le, MD, PhD, assistant professor in the department of thoracic/head and neck medical oncology at the University of Texas MD Anderson Cancer Center, Houston.
Dr. Le presented results from this trial as part of the American Society of Clinical Oncology virtual scientific program. Results were published simultaneously in the New England Journal of Medicine.
The trial, dubbed VISION, already won tepotinib approval in Japan to treat NSCLC patients with MET exon 14–skipping mutations. The Food and Drug Administration has granted tepotinib breakthrough status, and Merck, the drug’s manufacturer, plans to submit tepotinib for review this year.
The VISION trial enrolled 152 patients with NSCLC – 99 with at least 9 months of follow-up and 53 with shorter follow-up. The patients’ MET exon 14 mutations were confirmed by liquid or tissue biopsy.
The patients’ median age at baseline was 74 years, 54% were men, and almost half had no smoking history. Patients received tepotinib at 500 mg daily until disease progression or intolerable toxicity.
Overall, the VISION results “compare favorably” with those from studies of other MET inhibitors, the investigators wrote.
The 46.5% objective response rate (per independent reviewers) included the 99 patients with follow-up of at least 9 months who were liquid- or tissue-biopsy positive (combined group). The response rate was 48.5% among the 66 patients with positive liquid biopsies and 50% among the 60 patients with positive tissue biopsies.
The median progression-free survival was 8.5 months in the combined group, 8.5 months in the liquid-biopsy group, and 11 months in the tissue-biopsy group. The median overall survival was 17.1 months, 15.8 months, and 22.3 months, respectively.
The 11 patients with brain metastases at baseline had results that were in line with the other patients’ results. Patients with brain metastases had an objective response rate of 54.5%, a median response duration of 9.5 months, and a median progression-free survival of 10.9 months.
Overall, 88.8% of patients reported adverse events related to treatment, including peripheral edema in 63.2%, nausea in 25.7%, and diarrhea in 21.7%.
Grade 3-4 adverse events occurred in 27% of patients. Peripheral edema was the most common of these events, reported in 7.2% of patients.
“Proactive monitoring for peripheral edema is recommended and can be managed with temporary discontinuation of tepotinib or dose reduction,” the investigators wrote.
The death of a 79-year-old patient with respiratory failure and dyspnea, secondary to interstitial lung disease, was the only death considered to be treatment related.
The study was funded by Merck. Dr. Le and other investigators disclosed relationships, including employment, with the company.
SOURCE: Le X et al. ASCO 2020, Abstract 9556.
FROM ASCO 2020
TKI plus SBRT tops TKI alone for oligometastatic EGFRm NSCLC
Adding aggressive local radiotherapy to treatment with tyrosine kinase inhibitor (TKI) significantly improved progression-free and overall survival in patients with previously untreated, EGFR-mutated, oligometastatic non–small cell lung cancer (NSCLC) in a phase 3 trial presented as part of the American Society of Clinical Oncology virtual scientific program.
Sixty-eight patients were randomized at diagnosis to receive a first-generation TKI plus stereotactic body radiation therapy (SBRT) to all disease sites. The other 68 patients were randomized to receive a TKI alone, but 3 patients were lost follow-up and not included in the analysis. The TKIs used were gefitinib, erlotinib, and icotinib.
At baseline, patients had a maximum of two lesions in any one organ and no more than five metastases overall. Patients with brain metastases were excluded.
The median progression-free survival was 20.2 months in the SBRT arm and 12.5 months in the TKI-only arm (hazard ratio, 0.618; P < .001). The median overall survival was 25.5 months and 17.4 months, respectively (HR, 0.682; P < .001).
There were no grade 4/5 adverse events nor any statistically significant between-group differences in grade 3 events.
‘Compelling’ data with caveats
The study results suggest that “aggressive local therapy to sites at diagnosis should be explored further in large cohort phase 3 trials as a standard treatment option in this clinical scenario,” said investigator Xiao-shan Wang, MD, PhD, of the University of Electronic Science and Technology of China and Sichuan Provincial People’s Hospital in Chengdu.
“The data are compelling,” Dr. Wang added. “As we attempt to maximize the benefits of EGFR-directed targeted therapies, we are likely going to be moving away from a sequentially administered approach to treatment and considering combinations.”
The new findings, combined with prior phase 2 results, support “incorporation of upfront SBRT with TKI into practice for selected patients with oligometastatic disease, with the open question remaining of how many metastases are too many,” said study discussant Rachel Sanborn, MD, of Providence Cancer Institute Franz Clinic in Portland, Ore.
However, “it’s important to make note of the baseline characteristics of the patients enrolled,” she said.
Twelve percent of patients in the control arm and 4% of those in the SBRT group had EGFR exon 20 insertions. This “imbalance could have negatively impacted the outcomes in the TKI-alone arm,” Dr. Sanborn said.
Also, a higher proportion of patients in the TKI-alone arm received gefitinib, and “there was no information offered on second-line therapies in the study, which might have also affected outcomes,” Dr. Sanborn added.
Additional details
The study (NCT02893332) enrolled NSCLC patients with a life expectancy of at least 6 months and an Eastern Cooperative Oncology Group performance status score of 0-2. NSCLC was confirmed by pathology and EGFR mutations by gene sequencing.
The radiation dose was 25-40 Gy in five fractions. Gefitinib was used in 47% of patients in the SBRT arm and 58% of the control group. Erlotinib was used in 44% of the SBRT arm and 35% of controls. Icotinib was used by less than 10% of patients in each group.
Grade 3 skin rash occurred in 50% of patients in the SBRT arm and 62% of those in the TKI-alone arm. Grade 3 pneumonitis occurred in 30% and 15%, respectively. Grade 3 esophagitis occurred in 15% of patients in both arms.
One patient in the TKI arm had severe liver injury. One patient in the SBRT arm fractured a rib, which was considered probably related to the radiation.
Multivariate analysis revealed that, in addition to SBRT, lower baseline performance status score (0 vs. 1-2) and fewer metastases (<2 vs. ≥3) were protective for progression-free survival. Lower performance scores, fewer metastases, lower T stage (T1-2 vs. T3-4), and exon 19 versus exon 20 and 21 mutations were protective for overall survival.
The study arms were well balanced at baseline. The mean patient age was 66.9 years in the SBRT arm and 63.32 years in the TKI-only arm. In both arms, most patients were women (63% and 60%, respectively).
The study was sponsored by Sichuan Provincial People’s Hospital. The investigators and Dr. Sanborn have no relevant disclosures.
aotto@mdedge.com
SOURCE: Wang X et al. ASCO 2020, Abstract 9508.
Adding aggressive local radiotherapy to treatment with tyrosine kinase inhibitor (TKI) significantly improved progression-free and overall survival in patients with previously untreated, EGFR-mutated, oligometastatic non–small cell lung cancer (NSCLC) in a phase 3 trial presented as part of the American Society of Clinical Oncology virtual scientific program.
Sixty-eight patients were randomized at diagnosis to receive a first-generation TKI plus stereotactic body radiation therapy (SBRT) to all disease sites. The other 68 patients were randomized to receive a TKI alone, but 3 patients were lost follow-up and not included in the analysis. The TKIs used were gefitinib, erlotinib, and icotinib.
At baseline, patients had a maximum of two lesions in any one organ and no more than five metastases overall. Patients with brain metastases were excluded.
The median progression-free survival was 20.2 months in the SBRT arm and 12.5 months in the TKI-only arm (hazard ratio, 0.618; P < .001). The median overall survival was 25.5 months and 17.4 months, respectively (HR, 0.682; P < .001).
There were no grade 4/5 adverse events nor any statistically significant between-group differences in grade 3 events.
‘Compelling’ data with caveats
The study results suggest that “aggressive local therapy to sites at diagnosis should be explored further in large cohort phase 3 trials as a standard treatment option in this clinical scenario,” said investigator Xiao-shan Wang, MD, PhD, of the University of Electronic Science and Technology of China and Sichuan Provincial People’s Hospital in Chengdu.
“The data are compelling,” Dr. Wang added. “As we attempt to maximize the benefits of EGFR-directed targeted therapies, we are likely going to be moving away from a sequentially administered approach to treatment and considering combinations.”
The new findings, combined with prior phase 2 results, support “incorporation of upfront SBRT with TKI into practice for selected patients with oligometastatic disease, with the open question remaining of how many metastases are too many,” said study discussant Rachel Sanborn, MD, of Providence Cancer Institute Franz Clinic in Portland, Ore.
However, “it’s important to make note of the baseline characteristics of the patients enrolled,” she said.
Twelve percent of patients in the control arm and 4% of those in the SBRT group had EGFR exon 20 insertions. This “imbalance could have negatively impacted the outcomes in the TKI-alone arm,” Dr. Sanborn said.
Also, a higher proportion of patients in the TKI-alone arm received gefitinib, and “there was no information offered on second-line therapies in the study, which might have also affected outcomes,” Dr. Sanborn added.
Additional details
The study (NCT02893332) enrolled NSCLC patients with a life expectancy of at least 6 months and an Eastern Cooperative Oncology Group performance status score of 0-2. NSCLC was confirmed by pathology and EGFR mutations by gene sequencing.
The radiation dose was 25-40 Gy in five fractions. Gefitinib was used in 47% of patients in the SBRT arm and 58% of the control group. Erlotinib was used in 44% of the SBRT arm and 35% of controls. Icotinib was used by less than 10% of patients in each group.
Grade 3 skin rash occurred in 50% of patients in the SBRT arm and 62% of those in the TKI-alone arm. Grade 3 pneumonitis occurred in 30% and 15%, respectively. Grade 3 esophagitis occurred in 15% of patients in both arms.
One patient in the TKI arm had severe liver injury. One patient in the SBRT arm fractured a rib, which was considered probably related to the radiation.
Multivariate analysis revealed that, in addition to SBRT, lower baseline performance status score (0 vs. 1-2) and fewer metastases (<2 vs. ≥3) were protective for progression-free survival. Lower performance scores, fewer metastases, lower T stage (T1-2 vs. T3-4), and exon 19 versus exon 20 and 21 mutations were protective for overall survival.
The study arms were well balanced at baseline. The mean patient age was 66.9 years in the SBRT arm and 63.32 years in the TKI-only arm. In both arms, most patients were women (63% and 60%, respectively).
The study was sponsored by Sichuan Provincial People’s Hospital. The investigators and Dr. Sanborn have no relevant disclosures.
aotto@mdedge.com
SOURCE: Wang X et al. ASCO 2020, Abstract 9508.
Adding aggressive local radiotherapy to treatment with tyrosine kinase inhibitor (TKI) significantly improved progression-free and overall survival in patients with previously untreated, EGFR-mutated, oligometastatic non–small cell lung cancer (NSCLC) in a phase 3 trial presented as part of the American Society of Clinical Oncology virtual scientific program.
Sixty-eight patients were randomized at diagnosis to receive a first-generation TKI plus stereotactic body radiation therapy (SBRT) to all disease sites. The other 68 patients were randomized to receive a TKI alone, but 3 patients were lost follow-up and not included in the analysis. The TKIs used were gefitinib, erlotinib, and icotinib.
At baseline, patients had a maximum of two lesions in any one organ and no more than five metastases overall. Patients with brain metastases were excluded.
The median progression-free survival was 20.2 months in the SBRT arm and 12.5 months in the TKI-only arm (hazard ratio, 0.618; P < .001). The median overall survival was 25.5 months and 17.4 months, respectively (HR, 0.682; P < .001).
There were no grade 4/5 adverse events nor any statistically significant between-group differences in grade 3 events.
‘Compelling’ data with caveats
The study results suggest that “aggressive local therapy to sites at diagnosis should be explored further in large cohort phase 3 trials as a standard treatment option in this clinical scenario,” said investigator Xiao-shan Wang, MD, PhD, of the University of Electronic Science and Technology of China and Sichuan Provincial People’s Hospital in Chengdu.
“The data are compelling,” Dr. Wang added. “As we attempt to maximize the benefits of EGFR-directed targeted therapies, we are likely going to be moving away from a sequentially administered approach to treatment and considering combinations.”
The new findings, combined with prior phase 2 results, support “incorporation of upfront SBRT with TKI into practice for selected patients with oligometastatic disease, with the open question remaining of how many metastases are too many,” said study discussant Rachel Sanborn, MD, of Providence Cancer Institute Franz Clinic in Portland, Ore.
However, “it’s important to make note of the baseline characteristics of the patients enrolled,” she said.
Twelve percent of patients in the control arm and 4% of those in the SBRT group had EGFR exon 20 insertions. This “imbalance could have negatively impacted the outcomes in the TKI-alone arm,” Dr. Sanborn said.
Also, a higher proportion of patients in the TKI-alone arm received gefitinib, and “there was no information offered on second-line therapies in the study, which might have also affected outcomes,” Dr. Sanborn added.
Additional details
The study (NCT02893332) enrolled NSCLC patients with a life expectancy of at least 6 months and an Eastern Cooperative Oncology Group performance status score of 0-2. NSCLC was confirmed by pathology and EGFR mutations by gene sequencing.
The radiation dose was 25-40 Gy in five fractions. Gefitinib was used in 47% of patients in the SBRT arm and 58% of the control group. Erlotinib was used in 44% of the SBRT arm and 35% of controls. Icotinib was used by less than 10% of patients in each group.
Grade 3 skin rash occurred in 50% of patients in the SBRT arm and 62% of those in the TKI-alone arm. Grade 3 pneumonitis occurred in 30% and 15%, respectively. Grade 3 esophagitis occurred in 15% of patients in both arms.
One patient in the TKI arm had severe liver injury. One patient in the SBRT arm fractured a rib, which was considered probably related to the radiation.
Multivariate analysis revealed that, in addition to SBRT, lower baseline performance status score (0 vs. 1-2) and fewer metastases (<2 vs. ≥3) were protective for progression-free survival. Lower performance scores, fewer metastases, lower T stage (T1-2 vs. T3-4), and exon 19 versus exon 20 and 21 mutations were protective for overall survival.
The study arms were well balanced at baseline. The mean patient age was 66.9 years in the SBRT arm and 63.32 years in the TKI-only arm. In both arms, most patients were women (63% and 60%, respectively).
The study was sponsored by Sichuan Provincial People’s Hospital. The investigators and Dr. Sanborn have no relevant disclosures.
aotto@mdedge.com
SOURCE: Wang X et al. ASCO 2020, Abstract 9508.
FROM ASCO 2020
Pembrolizumab plus EP gives slight PFS edge in ES-SCLC
Adding the immune checkpoint inhibitor pembrolizumab to chemotherapy resulted in a modest improvement in progression-free survival (PFS) but no overall survival (OS) benefit as first-line therapy for patients with extensive-stage small cell lung cancer (ES-SCLC), results of the KEYNOTE-604 study showed.
Among 453 patients with ES-SCLC randomized to receive pembrolizumab plus etoposide and a platinum agent (EP) or placebo, the median PFS was 4.5 months with pembrolizumab and with 4.3 months with placebo.
This difference, although small, met the prespecified definition for significance, with a hazard ratio favoring pembrolizumab of 0.75 (P = .0023), reported Charles M. Rudin, MD, PhD, of Memorial Sloan Kettering Cancer Center in New York.
Median OS, the other primary endpoint, was 10.8 months for patients who received pembrolizumab and 9.7 months for those who received placebo. Although this translated to a hazard ratio of 0.80 for pembrolizumab, the P value of .0164 missed the prespecified threshold of .0128 and was therefore not statistically significant.
Dr. Rudin presented these results as part of the American Society of Clinical Oncology virtual scientific program. The study was also published online to coincide with the abstract’s release in the Journal of Clinical Oncology.
Beneficial but not practice-changing (yet)
“The addition of pembrolizumab results in durable responses in a subset of patients,” Dr. Rudin said. “I believe additional correlative analyses may help to identify those patients who derive long-term benefit from pembrolizumab.
“The safety profile was manageable with no new or unexpected toxicities. Taken together, these data support the benefit of pembrolizumab in patients with small cell lung cancer and add to the growing body of evidence supporting the value of immune checkpoint inhibitors in a historically difficult-to-treat cancer.”
The results suggest combination pembrolizumab and chemotherapy offers a “viable platform for a novel treatment strategy,” said invited discussant Taofeek K. Owonikoko, MD, PhD, director of thoracic oncology at the Winship Cancer Institute of Emory University in Atlanta.
However, because the trial did not meet the predefined threshold for success, “the immediate impact on practice of this trial is limited at present, and any future impact will have to be supported by regulatory decision,” Dr. Owonikoko said.
“The outcome of this trial also highlights the need for an uncomplicated study design and straightforward analytical plan to ensure accurate results,” he added.
Study details
KEYNOTE-604 investigators enrolled 453 patients with ES-SCLC who had no prior systemic therapy, good performance status, and a life expectancy of at least 3 months. Patients were stratified by type of platinum agent (cisplatin vs. carboplatin), Eastern Cooperative Oncology Group performance status 0 or 1, and lactate dehydrogenase levels below or above the upper limit of normal.
Patients were randomized to receive pembrolizumab at 200 mg or normal saline placebo on day 1. Both arms also received etoposide at 100 mg/m2 on days 1-3 and investigator’s choice of carboplatin to an area under the curve of 5 on day 1 or cisplatin at 75 mg/m2 on day 1 for four cycles every 3 weeks.
The assigned agent (pembrolizumab or placebo) could then be continued as maintenance therapy for up to 31 cycles every 21 days.
Patients with a complete or partial response after cycle 4 could receive up to 25 Gy of prophylactic cranial irradiation delivered over 10 fractions at the investigator’s discretion.
Survival and response
As noted, the median PFS was modestly but significantly longer with pembrolizumab plus EP at the second interim analysis, the protocol-specified time for final PFS analysis. The estimated 12-months PFS rates were 13.6% with pembrolizumab plus EP and 3.1% with placebo plus EP.
The final analysis was planned to occur about 31 months after the start of the study or when 284 deaths had occurred, whichever was later. At the final analysis, the median PFS was 4.8 months in the pembrolizumab arm and 4.3 months in the placebo arm. The hazard ratio was 0.73 (95% confidence interval 0.60-0.88).
The 12-month OS rate was 45.1% in the pembrolizumab arm and 39.6% in the placebo arm. Respective 24-month OS rates were 22.5% and 11.2%.
Overall responses rates were 70.6% in the pembrolizumab arm and 61.8% in the placebo arm. There were four and two complete responses per arm, respectively.
Safety
Approximately 75% of patients in both arms experienced grade 3 or 4 adverse events.
Fatal adverse events occurred in 6.3% of patients in the pembrolizumab arm and 5.4% in the control arm. The rates of death attributed to study treatment were identical, at 2.7% in each arm.
Events leading to discontinuation occurred in 14.8% of patients who received pembrolizumab and 6.3% of patients who received placebo. Adverse events leading to all treatment discontinuation were similar, at 4% and 3.6%, respectively.
The most common adverse events were hematologic, which are common with EP chemotherapy and did not appear to be exacerbated by the addition of pembrolizumab. Aside from hematologic toxicities, most events were of grade 1 or 2 severity.
Immune-mediated adverse events of any kind occurred in 24.7% of patients in the pembrolizumab arm and 10.3% of those in the placebo arm. Grade 3 or 4 immune-mediated events occurred in 7.2% and 1.3%, respectively.
There were no deaths from immune-mediated reactions in the pembrolizumab arm, but one patient on placebo died from pneumonia.
Merck Sharp & Dohme supported the study. Dr. Rudin disclosed institutional research funding from Merck and a consulting or advisory role for other companies. Dr. Owonikoko disclosed a consulting/advisory role and institutional research funding from Merck and others, and he is a cofounder and stock owner in Cambium Oncology.
SOURCE: Rudin CM et al. ASCO 2020. Abstract 9001.
Adding the immune checkpoint inhibitor pembrolizumab to chemotherapy resulted in a modest improvement in progression-free survival (PFS) but no overall survival (OS) benefit as first-line therapy for patients with extensive-stage small cell lung cancer (ES-SCLC), results of the KEYNOTE-604 study showed.
Among 453 patients with ES-SCLC randomized to receive pembrolizumab plus etoposide and a platinum agent (EP) or placebo, the median PFS was 4.5 months with pembrolizumab and with 4.3 months with placebo.
This difference, although small, met the prespecified definition for significance, with a hazard ratio favoring pembrolizumab of 0.75 (P = .0023), reported Charles M. Rudin, MD, PhD, of Memorial Sloan Kettering Cancer Center in New York.
Median OS, the other primary endpoint, was 10.8 months for patients who received pembrolizumab and 9.7 months for those who received placebo. Although this translated to a hazard ratio of 0.80 for pembrolizumab, the P value of .0164 missed the prespecified threshold of .0128 and was therefore not statistically significant.
Dr. Rudin presented these results as part of the American Society of Clinical Oncology virtual scientific program. The study was also published online to coincide with the abstract’s release in the Journal of Clinical Oncology.
Beneficial but not practice-changing (yet)
“The addition of pembrolizumab results in durable responses in a subset of patients,” Dr. Rudin said. “I believe additional correlative analyses may help to identify those patients who derive long-term benefit from pembrolizumab.
“The safety profile was manageable with no new or unexpected toxicities. Taken together, these data support the benefit of pembrolizumab in patients with small cell lung cancer and add to the growing body of evidence supporting the value of immune checkpoint inhibitors in a historically difficult-to-treat cancer.”
The results suggest combination pembrolizumab and chemotherapy offers a “viable platform for a novel treatment strategy,” said invited discussant Taofeek K. Owonikoko, MD, PhD, director of thoracic oncology at the Winship Cancer Institute of Emory University in Atlanta.
However, because the trial did not meet the predefined threshold for success, “the immediate impact on practice of this trial is limited at present, and any future impact will have to be supported by regulatory decision,” Dr. Owonikoko said.
“The outcome of this trial also highlights the need for an uncomplicated study design and straightforward analytical plan to ensure accurate results,” he added.
Study details
KEYNOTE-604 investigators enrolled 453 patients with ES-SCLC who had no prior systemic therapy, good performance status, and a life expectancy of at least 3 months. Patients were stratified by type of platinum agent (cisplatin vs. carboplatin), Eastern Cooperative Oncology Group performance status 0 or 1, and lactate dehydrogenase levels below or above the upper limit of normal.
Patients were randomized to receive pembrolizumab at 200 mg or normal saline placebo on day 1. Both arms also received etoposide at 100 mg/m2 on days 1-3 and investigator’s choice of carboplatin to an area under the curve of 5 on day 1 or cisplatin at 75 mg/m2 on day 1 for four cycles every 3 weeks.
The assigned agent (pembrolizumab or placebo) could then be continued as maintenance therapy for up to 31 cycles every 21 days.
Patients with a complete or partial response after cycle 4 could receive up to 25 Gy of prophylactic cranial irradiation delivered over 10 fractions at the investigator’s discretion.
Survival and response
As noted, the median PFS was modestly but significantly longer with pembrolizumab plus EP at the second interim analysis, the protocol-specified time for final PFS analysis. The estimated 12-months PFS rates were 13.6% with pembrolizumab plus EP and 3.1% with placebo plus EP.
The final analysis was planned to occur about 31 months after the start of the study or when 284 deaths had occurred, whichever was later. At the final analysis, the median PFS was 4.8 months in the pembrolizumab arm and 4.3 months in the placebo arm. The hazard ratio was 0.73 (95% confidence interval 0.60-0.88).
The 12-month OS rate was 45.1% in the pembrolizumab arm and 39.6% in the placebo arm. Respective 24-month OS rates were 22.5% and 11.2%.
Overall responses rates were 70.6% in the pembrolizumab arm and 61.8% in the placebo arm. There were four and two complete responses per arm, respectively.
Safety
Approximately 75% of patients in both arms experienced grade 3 or 4 adverse events.
Fatal adverse events occurred in 6.3% of patients in the pembrolizumab arm and 5.4% in the control arm. The rates of death attributed to study treatment were identical, at 2.7% in each arm.
Events leading to discontinuation occurred in 14.8% of patients who received pembrolizumab and 6.3% of patients who received placebo. Adverse events leading to all treatment discontinuation were similar, at 4% and 3.6%, respectively.
The most common adverse events were hematologic, which are common with EP chemotherapy and did not appear to be exacerbated by the addition of pembrolizumab. Aside from hematologic toxicities, most events were of grade 1 or 2 severity.
Immune-mediated adverse events of any kind occurred in 24.7% of patients in the pembrolizumab arm and 10.3% of those in the placebo arm. Grade 3 or 4 immune-mediated events occurred in 7.2% and 1.3%, respectively.
There were no deaths from immune-mediated reactions in the pembrolizumab arm, but one patient on placebo died from pneumonia.
Merck Sharp & Dohme supported the study. Dr. Rudin disclosed institutional research funding from Merck and a consulting or advisory role for other companies. Dr. Owonikoko disclosed a consulting/advisory role and institutional research funding from Merck and others, and he is a cofounder and stock owner in Cambium Oncology.
SOURCE: Rudin CM et al. ASCO 2020. Abstract 9001.
Adding the immune checkpoint inhibitor pembrolizumab to chemotherapy resulted in a modest improvement in progression-free survival (PFS) but no overall survival (OS) benefit as first-line therapy for patients with extensive-stage small cell lung cancer (ES-SCLC), results of the KEYNOTE-604 study showed.
Among 453 patients with ES-SCLC randomized to receive pembrolizumab plus etoposide and a platinum agent (EP) or placebo, the median PFS was 4.5 months with pembrolizumab and with 4.3 months with placebo.
This difference, although small, met the prespecified definition for significance, with a hazard ratio favoring pembrolizumab of 0.75 (P = .0023), reported Charles M. Rudin, MD, PhD, of Memorial Sloan Kettering Cancer Center in New York.
Median OS, the other primary endpoint, was 10.8 months for patients who received pembrolizumab and 9.7 months for those who received placebo. Although this translated to a hazard ratio of 0.80 for pembrolizumab, the P value of .0164 missed the prespecified threshold of .0128 and was therefore not statistically significant.
Dr. Rudin presented these results as part of the American Society of Clinical Oncology virtual scientific program. The study was also published online to coincide with the abstract’s release in the Journal of Clinical Oncology.
Beneficial but not practice-changing (yet)
“The addition of pembrolizumab results in durable responses in a subset of patients,” Dr. Rudin said. “I believe additional correlative analyses may help to identify those patients who derive long-term benefit from pembrolizumab.
“The safety profile was manageable with no new or unexpected toxicities. Taken together, these data support the benefit of pembrolizumab in patients with small cell lung cancer and add to the growing body of evidence supporting the value of immune checkpoint inhibitors in a historically difficult-to-treat cancer.”
The results suggest combination pembrolizumab and chemotherapy offers a “viable platform for a novel treatment strategy,” said invited discussant Taofeek K. Owonikoko, MD, PhD, director of thoracic oncology at the Winship Cancer Institute of Emory University in Atlanta.
However, because the trial did not meet the predefined threshold for success, “the immediate impact on practice of this trial is limited at present, and any future impact will have to be supported by regulatory decision,” Dr. Owonikoko said.
“The outcome of this trial also highlights the need for an uncomplicated study design and straightforward analytical plan to ensure accurate results,” he added.
Study details
KEYNOTE-604 investigators enrolled 453 patients with ES-SCLC who had no prior systemic therapy, good performance status, and a life expectancy of at least 3 months. Patients were stratified by type of platinum agent (cisplatin vs. carboplatin), Eastern Cooperative Oncology Group performance status 0 or 1, and lactate dehydrogenase levels below or above the upper limit of normal.
Patients were randomized to receive pembrolizumab at 200 mg or normal saline placebo on day 1. Both arms also received etoposide at 100 mg/m2 on days 1-3 and investigator’s choice of carboplatin to an area under the curve of 5 on day 1 or cisplatin at 75 mg/m2 on day 1 for four cycles every 3 weeks.
The assigned agent (pembrolizumab or placebo) could then be continued as maintenance therapy for up to 31 cycles every 21 days.
Patients with a complete or partial response after cycle 4 could receive up to 25 Gy of prophylactic cranial irradiation delivered over 10 fractions at the investigator’s discretion.
Survival and response
As noted, the median PFS was modestly but significantly longer with pembrolizumab plus EP at the second interim analysis, the protocol-specified time for final PFS analysis. The estimated 12-months PFS rates were 13.6% with pembrolizumab plus EP and 3.1% with placebo plus EP.
The final analysis was planned to occur about 31 months after the start of the study or when 284 deaths had occurred, whichever was later. At the final analysis, the median PFS was 4.8 months in the pembrolizumab arm and 4.3 months in the placebo arm. The hazard ratio was 0.73 (95% confidence interval 0.60-0.88).
The 12-month OS rate was 45.1% in the pembrolizumab arm and 39.6% in the placebo arm. Respective 24-month OS rates were 22.5% and 11.2%.
Overall responses rates were 70.6% in the pembrolizumab arm and 61.8% in the placebo arm. There were four and two complete responses per arm, respectively.
Safety
Approximately 75% of patients in both arms experienced grade 3 or 4 adverse events.
Fatal adverse events occurred in 6.3% of patients in the pembrolizumab arm and 5.4% in the control arm. The rates of death attributed to study treatment were identical, at 2.7% in each arm.
Events leading to discontinuation occurred in 14.8% of patients who received pembrolizumab and 6.3% of patients who received placebo. Adverse events leading to all treatment discontinuation were similar, at 4% and 3.6%, respectively.
The most common adverse events were hematologic, which are common with EP chemotherapy and did not appear to be exacerbated by the addition of pembrolizumab. Aside from hematologic toxicities, most events were of grade 1 or 2 severity.
Immune-mediated adverse events of any kind occurred in 24.7% of patients in the pembrolizumab arm and 10.3% of those in the placebo arm. Grade 3 or 4 immune-mediated events occurred in 7.2% and 1.3%, respectively.
There were no deaths from immune-mediated reactions in the pembrolizumab arm, but one patient on placebo died from pneumonia.
Merck Sharp & Dohme supported the study. Dr. Rudin disclosed institutional research funding from Merck and a consulting or advisory role for other companies. Dr. Owonikoko disclosed a consulting/advisory role and institutional research funding from Merck and others, and he is a cofounder and stock owner in Cambium Oncology.
SOURCE: Rudin CM et al. ASCO 2020. Abstract 9001.
FROM ASCO 2020
‘Promising’ durvalumab results spark phase 3 trial in mesothelioma
Adding durvalumab to first-line pemetrexed and cisplatin improved survival in patients with unresectable malignant pleural mesothelioma (MPM) in a phase 2 trial, compared with historical controls who received only pemetrexed and cisplatin.
The median overall survival was 20.4 months in patients who received durvalumab plus pemetrexed-cisplatin. This is significantly longer than the median overall survival of 12.1 months (P = .0014) observed with pemetrexed-cisplatin in a prior phase 3 study (J Clin Oncol. 2003 Jul 15;21[14]:2636-44).
The new phase 2 results are “promising,” said lead investigator Patrick Forde, MBBCh, director of the thoracic cancer clinical research program at Johns Hopkins University in Baltimore.
He presented the results as part of the American Society of Clinical Oncology virtual scientific program.
Dr. Forde noted that a phase 3 trial directly comparing pemetrexed-cisplatin plus durvalumab to pemetrexed-cisplatin will begin recruiting this year. The trial is a collaboration between U.S. investigators and Australian researchers who reported their own phase 2 results with durvalumab plus pemetrexed-cisplatin in 2018 (J Thorac Oncol. 2018 Oct;13[10]:S338-339).
Study details
Dr. Forde’s phase 2 study enrolled 55 patients with treatment-naive, unresectable MPM. Their median age was 68 years (range, 35-83 years), and 45 (82%) were men. All had an Eastern Cooperative Oncology Group performance status of 0-1.
Epithelioid mesothelioma was the histologic subtype in three-quarters of patients. “It was a fairly typical mesothelioma population,” Dr. Forde said.
The patients received durvalumab at 1,120 mg plus pemetrexed at 500 mg/m2 and cisplatin at 75 mg/m2 every 3 weeks for up to six cycles. Carboplatin was substituted when cisplatin was contraindicated or patients developed toxicities.
All but one patient had stable or responding disease on radiography and went on to durvalumab maintenance, also given at 1,120 mg every 3 weeks, for up to 1 year from study entry.
Results
Dr. Forde said this study had 90% power to detect a 58% improvement in median overall survival, from the 12.1 months seen in historical controls to 19 months, which was the goal of this study.
It was a positive study, he said, as the median overall survival was 20.4 months (P = .0014).
The overall survival rate was 87.2% at 6 months, 70.4% at 12 months, and 44.2% at 24 months. The progression-free survival rate was 69.1% at 6 months, 16.4% at 12 months, and 10.9% at 24 months.
The overall response rate was 56.4%, which comprised 31 partial responses. Forty percent of patients (n = 22) had stable disease. One patient had progressive disease, and one was not evaluable (1.8% each).
To help with future patient selection, the researchers looked for baseline biomarkers that predicted response. Tumor PD-L1 expression, tumor mutation burden, and other potential candidates haven’t worked out so far, but the work continues, Dr. Forde said.
He noted that many of the adverse events in this trial are those typically seen with platinum-based chemotherapy.
Grade 3/4 treatment-emergent adverse events included anemia (n = 14), fatigue (n = 4), decreased appetite (n = 1), and hypomagnesemia (n = 1).
The most common grade 1/2 adverse events of special interest were hypothyroidism (n = 7), rash (n = 5), pruritus (n = 3), AST elevation (n = 3), and hyperthyroidism (n = 3).
Putting the results in context
Given the role of inflammation in MPM, durvalumab is among several immunotherapies under investigation for the disease.
A phase 3 French trial showed MPM patients had a median overall survival of 18.8 months with pemetrexed-cisplatin plus bevacizumab versus 16.1 months with pemetrexed-cisplatin only (Lancet. 2016 Apr 2;387[10026]:1405-1414).
The higher overall survival in the French study’s pemetrexed-cisplatin arm, compared with the 2003 trial results, is likely due to the use of modern second-line options, said Marjorie Zauderer, MD, codirector of the mesothelioma program at Memorial Sloan Kettering Cancer Center in New York, who was the discussant for Dr. Forde’s presentation.
“I think the improvement in overall survival presented by Dr. Forde is potentially clinically meaningful,” she said, but it was “well within the 95% confidence interval” of the bevacizumab trial. Even so, “I look forward” to the phase 3 results, she said.
Dr. Zauderer also pointed out an April press release from Bristol Myers Squibb that reported improved survival over pemetrexed-cisplatin with two of the company’s immunotherapies, nivolumab and ipilimumab, not as additions but as replacement first-line therapy. However, the randomized trial data haven’t been released yet. “We are all eager to evaluate this option further,” she said.
AstraZeneca, maker of durvalumab, funded the current study. Dr. Forde is an adviser for the company and reported research funding. Dr. Zauderer reported a relationship with Roche, which markets bevacizumab through its subsidiary, Genentech. She also disclosed research funding from Bristol Myers Squibb.
SOURCE: Forde PM et al. ASCO 2020, Abstract 9003.
Adding durvalumab to first-line pemetrexed and cisplatin improved survival in patients with unresectable malignant pleural mesothelioma (MPM) in a phase 2 trial, compared with historical controls who received only pemetrexed and cisplatin.
The median overall survival was 20.4 months in patients who received durvalumab plus pemetrexed-cisplatin. This is significantly longer than the median overall survival of 12.1 months (P = .0014) observed with pemetrexed-cisplatin in a prior phase 3 study (J Clin Oncol. 2003 Jul 15;21[14]:2636-44).
The new phase 2 results are “promising,” said lead investigator Patrick Forde, MBBCh, director of the thoracic cancer clinical research program at Johns Hopkins University in Baltimore.
He presented the results as part of the American Society of Clinical Oncology virtual scientific program.
Dr. Forde noted that a phase 3 trial directly comparing pemetrexed-cisplatin plus durvalumab to pemetrexed-cisplatin will begin recruiting this year. The trial is a collaboration between U.S. investigators and Australian researchers who reported their own phase 2 results with durvalumab plus pemetrexed-cisplatin in 2018 (J Thorac Oncol. 2018 Oct;13[10]:S338-339).
Study details
Dr. Forde’s phase 2 study enrolled 55 patients with treatment-naive, unresectable MPM. Their median age was 68 years (range, 35-83 years), and 45 (82%) were men. All had an Eastern Cooperative Oncology Group performance status of 0-1.
Epithelioid mesothelioma was the histologic subtype in three-quarters of patients. “It was a fairly typical mesothelioma population,” Dr. Forde said.
The patients received durvalumab at 1,120 mg plus pemetrexed at 500 mg/m2 and cisplatin at 75 mg/m2 every 3 weeks for up to six cycles. Carboplatin was substituted when cisplatin was contraindicated or patients developed toxicities.
All but one patient had stable or responding disease on radiography and went on to durvalumab maintenance, also given at 1,120 mg every 3 weeks, for up to 1 year from study entry.
Results
Dr. Forde said this study had 90% power to detect a 58% improvement in median overall survival, from the 12.1 months seen in historical controls to 19 months, which was the goal of this study.
It was a positive study, he said, as the median overall survival was 20.4 months (P = .0014).
The overall survival rate was 87.2% at 6 months, 70.4% at 12 months, and 44.2% at 24 months. The progression-free survival rate was 69.1% at 6 months, 16.4% at 12 months, and 10.9% at 24 months.
The overall response rate was 56.4%, which comprised 31 partial responses. Forty percent of patients (n = 22) had stable disease. One patient had progressive disease, and one was not evaluable (1.8% each).
To help with future patient selection, the researchers looked for baseline biomarkers that predicted response. Tumor PD-L1 expression, tumor mutation burden, and other potential candidates haven’t worked out so far, but the work continues, Dr. Forde said.
He noted that many of the adverse events in this trial are those typically seen with platinum-based chemotherapy.
Grade 3/4 treatment-emergent adverse events included anemia (n = 14), fatigue (n = 4), decreased appetite (n = 1), and hypomagnesemia (n = 1).
The most common grade 1/2 adverse events of special interest were hypothyroidism (n = 7), rash (n = 5), pruritus (n = 3), AST elevation (n = 3), and hyperthyroidism (n = 3).
Putting the results in context
Given the role of inflammation in MPM, durvalumab is among several immunotherapies under investigation for the disease.
A phase 3 French trial showed MPM patients had a median overall survival of 18.8 months with pemetrexed-cisplatin plus bevacizumab versus 16.1 months with pemetrexed-cisplatin only (Lancet. 2016 Apr 2;387[10026]:1405-1414).
The higher overall survival in the French study’s pemetrexed-cisplatin arm, compared with the 2003 trial results, is likely due to the use of modern second-line options, said Marjorie Zauderer, MD, codirector of the mesothelioma program at Memorial Sloan Kettering Cancer Center in New York, who was the discussant for Dr. Forde’s presentation.
“I think the improvement in overall survival presented by Dr. Forde is potentially clinically meaningful,” she said, but it was “well within the 95% confidence interval” of the bevacizumab trial. Even so, “I look forward” to the phase 3 results, she said.
Dr. Zauderer also pointed out an April press release from Bristol Myers Squibb that reported improved survival over pemetrexed-cisplatin with two of the company’s immunotherapies, nivolumab and ipilimumab, not as additions but as replacement first-line therapy. However, the randomized trial data haven’t been released yet. “We are all eager to evaluate this option further,” she said.
AstraZeneca, maker of durvalumab, funded the current study. Dr. Forde is an adviser for the company and reported research funding. Dr. Zauderer reported a relationship with Roche, which markets bevacizumab through its subsidiary, Genentech. She also disclosed research funding from Bristol Myers Squibb.
SOURCE: Forde PM et al. ASCO 2020, Abstract 9003.
Adding durvalumab to first-line pemetrexed and cisplatin improved survival in patients with unresectable malignant pleural mesothelioma (MPM) in a phase 2 trial, compared with historical controls who received only pemetrexed and cisplatin.
The median overall survival was 20.4 months in patients who received durvalumab plus pemetrexed-cisplatin. This is significantly longer than the median overall survival of 12.1 months (P = .0014) observed with pemetrexed-cisplatin in a prior phase 3 study (J Clin Oncol. 2003 Jul 15;21[14]:2636-44).
The new phase 2 results are “promising,” said lead investigator Patrick Forde, MBBCh, director of the thoracic cancer clinical research program at Johns Hopkins University in Baltimore.
He presented the results as part of the American Society of Clinical Oncology virtual scientific program.
Dr. Forde noted that a phase 3 trial directly comparing pemetrexed-cisplatin plus durvalumab to pemetrexed-cisplatin will begin recruiting this year. The trial is a collaboration between U.S. investigators and Australian researchers who reported their own phase 2 results with durvalumab plus pemetrexed-cisplatin in 2018 (J Thorac Oncol. 2018 Oct;13[10]:S338-339).
Study details
Dr. Forde’s phase 2 study enrolled 55 patients with treatment-naive, unresectable MPM. Their median age was 68 years (range, 35-83 years), and 45 (82%) were men. All had an Eastern Cooperative Oncology Group performance status of 0-1.
Epithelioid mesothelioma was the histologic subtype in three-quarters of patients. “It was a fairly typical mesothelioma population,” Dr. Forde said.
The patients received durvalumab at 1,120 mg plus pemetrexed at 500 mg/m2 and cisplatin at 75 mg/m2 every 3 weeks for up to six cycles. Carboplatin was substituted when cisplatin was contraindicated or patients developed toxicities.
All but one patient had stable or responding disease on radiography and went on to durvalumab maintenance, also given at 1,120 mg every 3 weeks, for up to 1 year from study entry.
Results
Dr. Forde said this study had 90% power to detect a 58% improvement in median overall survival, from the 12.1 months seen in historical controls to 19 months, which was the goal of this study.
It was a positive study, he said, as the median overall survival was 20.4 months (P = .0014).
The overall survival rate was 87.2% at 6 months, 70.4% at 12 months, and 44.2% at 24 months. The progression-free survival rate was 69.1% at 6 months, 16.4% at 12 months, and 10.9% at 24 months.
The overall response rate was 56.4%, which comprised 31 partial responses. Forty percent of patients (n = 22) had stable disease. One patient had progressive disease, and one was not evaluable (1.8% each).
To help with future patient selection, the researchers looked for baseline biomarkers that predicted response. Tumor PD-L1 expression, tumor mutation burden, and other potential candidates haven’t worked out so far, but the work continues, Dr. Forde said.
He noted that many of the adverse events in this trial are those typically seen with platinum-based chemotherapy.
Grade 3/4 treatment-emergent adverse events included anemia (n = 14), fatigue (n = 4), decreased appetite (n = 1), and hypomagnesemia (n = 1).
The most common grade 1/2 adverse events of special interest were hypothyroidism (n = 7), rash (n = 5), pruritus (n = 3), AST elevation (n = 3), and hyperthyroidism (n = 3).
Putting the results in context
Given the role of inflammation in MPM, durvalumab is among several immunotherapies under investigation for the disease.
A phase 3 French trial showed MPM patients had a median overall survival of 18.8 months with pemetrexed-cisplatin plus bevacizumab versus 16.1 months with pemetrexed-cisplatin only (Lancet. 2016 Apr 2;387[10026]:1405-1414).
The higher overall survival in the French study’s pemetrexed-cisplatin arm, compared with the 2003 trial results, is likely due to the use of modern second-line options, said Marjorie Zauderer, MD, codirector of the mesothelioma program at Memorial Sloan Kettering Cancer Center in New York, who was the discussant for Dr. Forde’s presentation.
“I think the improvement in overall survival presented by Dr. Forde is potentially clinically meaningful,” she said, but it was “well within the 95% confidence interval” of the bevacizumab trial. Even so, “I look forward” to the phase 3 results, she said.
Dr. Zauderer also pointed out an April press release from Bristol Myers Squibb that reported improved survival over pemetrexed-cisplatin with two of the company’s immunotherapies, nivolumab and ipilimumab, not as additions but as replacement first-line therapy. However, the randomized trial data haven’t been released yet. “We are all eager to evaluate this option further,” she said.
AstraZeneca, maker of durvalumab, funded the current study. Dr. Forde is an adviser for the company and reported research funding. Dr. Zauderer reported a relationship with Roche, which markets bevacizumab through its subsidiary, Genentech. She also disclosed research funding from Bristol Myers Squibb.
SOURCE: Forde PM et al. ASCO 2020, Abstract 9003.
FROM ASCO 2020
Germline testing in advanced cancer can lead to targeted treatment
The study involved 11,974 patients with various tumor types. All the patients underwent germline genetic testing from 2015 to 2019 at the Memorial Sloan Kettering Cancer Center (MSKCC) in New York, using the next-generation sequencing panel MSK-IMPACT.
This testing showed that 17.1% of patients had variants in cancer predisposition genes, and 7.1%-8.6% had variants that could potentially be targeted.
“Of course, these numbers are not static,” commented lead author Zsofia K. Stadler, MD, a medical oncologist at MSKCC. “And with the emergence of novel targeted treatments with new FDA indications, the therapeutic actionability of germline variants is likely to increase over time.
“Our study demonstrates the first comprehensive assessment of the clinical utility of germline alterations for therapeutic actionability in a population of patients with advanced cancer,” she added.
Dr. Stadler presented the study results during a virtual scientific program of the American Society of Clinical Oncology 2020.
Testing for somatic mutations is evolving as the standard of care in many cancer types, and somatic genomic testing is rapidly becoming an integral part of the regimen for patients with advanced disease. Some studies suggest that 9%-11% of patients harbor actionable genetic alterations, as determined on the basis of tumor profiling.
“The take-home message from this is that now, more than ever before, germline testing is indicated for the selection of cancer treatment,” said Erin Wysong Hofstatter, MD, from Yale University, New Haven, Conn., in a Highlights of the Day session.
An emerging indication for germline testing is the selection of treatment in the advanced setting, she noted. “And it is important to know your test. Remember that tumor sequencing is not a substitute for comprehensive germline testing.”
Implications in cancer treatment
For their study, Dr. Stadler and colleagues reviewed the medical records of patients with likely pathogenic/pathogenic germline (LP/P) alterations in genes that had known therapeutic targets so as to identify germline-targeted treatment either in a clinical or research setting.
“Since 2015, patients undergoing MSK-IMPACT may also choose to provide additional consent for secondary germline genetic analysis, wherein up to 88 genes known to be associated with cancer predisposition are analyzed,” she said. “Likely pathogenic and pathogenic germline alterations identified are disclosed to the patient and treating physician via the Clinical Genetic Service.”
A total of 2043 (17.1%) patients who harbored LP/P variants in a cancer predisposition gene were identified. Of these, 11% of patients harbored pathogenic alterations in high or moderate penetrance cancer predisposition genes. When the analysis was limited to genes with targeted therapeutic actionability, or what the authors defined as tier 1 and tier 2 genes, 7.1% of patients (n = 849) harbored a targetable pathogenic germline alteration.
BRCA alterations accounted for half (52%) of the findings, and 20% were associated with Lynch syndrome.
The tier 2 genes, which included PALB2, ATM, RAD51C, and RAD51D, accounted for about a quarter of the findings. Dr. Hofstatter noted that, using strict criteria, 7.1% of patients (n = 849) were found to harbor a pathogenic alteration and a targetable gene. Using less stringent criteria, additional tier 3 genes and additional genes associated with DNA homologous recombination repair brought the number up to 8.6% (n = 1,003).
Therapeutic action
For determining therapeutic actionability, the strict criteria were used; 593 patients (4.95%) with recurrent or metastatic disease were identified. For these patients, consideration of a targeted therapy, either as part of standard care or as part of an investigation or research protocol, was important.
Of this group, 44% received therapy targeting the germline alteration. Regarding specific genes, 50% of BRCA1/2 carriers and 58% of Lynch syndrome patients received targeted treatment. With respect to tier 2 genes, 40% of patients with PALB2, 19% with ATM, and 37% with RAD51C or 51D received a poly (ADP-ribose) polymerase (PARP) inhibitor.
Among patients with a BRCA1/2 mutation who received a PARP inhibitor, 55.1% had breast or ovarian cancer, and 44.8% had other tumor types, including pancreas, prostate, bile duct, gastric cancers. These patients received the drug in a research setting.
For patients with PALB2 alterations who received PARP inhibitors, 53.3% had breast or pancreas cancer, and 46.7% had cancer of the prostate, ovary, or an unknown primary.
Looking ahead
The discussant for the paper, Funda Meric-Bernstam, MD, chair of the Department of Investigational Cancer Therapeutics at the University of Texas MD Anderson Cancer Center, Houston, pointed out that most of the BRCA-positive patients had cancers traditionally associated with the mutation. “There were no patients with PTEN mutations treated, and interestingly, no patients with NF1 were treated,” she said. “But actionability is evolving, as the MEK inhibitor selumitinib was recently approved for NF1.”
Some questions remain unanswered, she noted, such as: “What percentage of patients undergoing tumor-normal testing signed a germline protocol?” and “Does the population introduce a bias – such as younger patients, family history, and so on?”
It is also unknown what percentage of germline alterations were known in comparison with those identified through tumor/normal testing. Also of importance is the fact that in this study, the results of germline testing were delivered in an academic setting, she emphasized. “What if they were delivered elsewhere? What would be the impact of identifying these alterations in an environment with less access to trials?
“But to be fair, it is not easy to seek the germline mutations,” Dr. Meric-Bernstam continued. “These studies were done under institutional review board protocols, and it is important to note that most profiling is done as standard of care without consenting and soliciting patient preference on the return of germline results.”
An infrastructure is needed to return/counsel/offer cascade testing, and “analyses need to be facilitated to ensure that findings can be acted upon in a timely fashion,” she added.
The study was supported by MSKCC internal funding. Dr. Stadler reported relationships (institutional) with Adverum, Alimera Sciences, Allergan, Biomarin, Fortress Biotech, Genentech/Roche, Novartis, Optos, Regeneron, Regenxbio, and Spark Therapeutics. Dr. Meric-Bernstram reported relationships with numerous pharmaceutical companies.
This article first appeared on Medscape.com.
The study involved 11,974 patients with various tumor types. All the patients underwent germline genetic testing from 2015 to 2019 at the Memorial Sloan Kettering Cancer Center (MSKCC) in New York, using the next-generation sequencing panel MSK-IMPACT.
This testing showed that 17.1% of patients had variants in cancer predisposition genes, and 7.1%-8.6% had variants that could potentially be targeted.
“Of course, these numbers are not static,” commented lead author Zsofia K. Stadler, MD, a medical oncologist at MSKCC. “And with the emergence of novel targeted treatments with new FDA indications, the therapeutic actionability of germline variants is likely to increase over time.
“Our study demonstrates the first comprehensive assessment of the clinical utility of germline alterations for therapeutic actionability in a population of patients with advanced cancer,” she added.
Dr. Stadler presented the study results during a virtual scientific program of the American Society of Clinical Oncology 2020.
Testing for somatic mutations is evolving as the standard of care in many cancer types, and somatic genomic testing is rapidly becoming an integral part of the regimen for patients with advanced disease. Some studies suggest that 9%-11% of patients harbor actionable genetic alterations, as determined on the basis of tumor profiling.
“The take-home message from this is that now, more than ever before, germline testing is indicated for the selection of cancer treatment,” said Erin Wysong Hofstatter, MD, from Yale University, New Haven, Conn., in a Highlights of the Day session.
An emerging indication for germline testing is the selection of treatment in the advanced setting, she noted. “And it is important to know your test. Remember that tumor sequencing is not a substitute for comprehensive germline testing.”
Implications in cancer treatment
For their study, Dr. Stadler and colleagues reviewed the medical records of patients with likely pathogenic/pathogenic germline (LP/P) alterations in genes that had known therapeutic targets so as to identify germline-targeted treatment either in a clinical or research setting.
“Since 2015, patients undergoing MSK-IMPACT may also choose to provide additional consent for secondary germline genetic analysis, wherein up to 88 genes known to be associated with cancer predisposition are analyzed,” she said. “Likely pathogenic and pathogenic germline alterations identified are disclosed to the patient and treating physician via the Clinical Genetic Service.”
A total of 2043 (17.1%) patients who harbored LP/P variants in a cancer predisposition gene were identified. Of these, 11% of patients harbored pathogenic alterations in high or moderate penetrance cancer predisposition genes. When the analysis was limited to genes with targeted therapeutic actionability, or what the authors defined as tier 1 and tier 2 genes, 7.1% of patients (n = 849) harbored a targetable pathogenic germline alteration.
BRCA alterations accounted for half (52%) of the findings, and 20% were associated with Lynch syndrome.
The tier 2 genes, which included PALB2, ATM, RAD51C, and RAD51D, accounted for about a quarter of the findings. Dr. Hofstatter noted that, using strict criteria, 7.1% of patients (n = 849) were found to harbor a pathogenic alteration and a targetable gene. Using less stringent criteria, additional tier 3 genes and additional genes associated with DNA homologous recombination repair brought the number up to 8.6% (n = 1,003).
Therapeutic action
For determining therapeutic actionability, the strict criteria were used; 593 patients (4.95%) with recurrent or metastatic disease were identified. For these patients, consideration of a targeted therapy, either as part of standard care or as part of an investigation or research protocol, was important.
Of this group, 44% received therapy targeting the germline alteration. Regarding specific genes, 50% of BRCA1/2 carriers and 58% of Lynch syndrome patients received targeted treatment. With respect to tier 2 genes, 40% of patients with PALB2, 19% with ATM, and 37% with RAD51C or 51D received a poly (ADP-ribose) polymerase (PARP) inhibitor.
Among patients with a BRCA1/2 mutation who received a PARP inhibitor, 55.1% had breast or ovarian cancer, and 44.8% had other tumor types, including pancreas, prostate, bile duct, gastric cancers. These patients received the drug in a research setting.
For patients with PALB2 alterations who received PARP inhibitors, 53.3% had breast or pancreas cancer, and 46.7% had cancer of the prostate, ovary, or an unknown primary.
Looking ahead
The discussant for the paper, Funda Meric-Bernstam, MD, chair of the Department of Investigational Cancer Therapeutics at the University of Texas MD Anderson Cancer Center, Houston, pointed out that most of the BRCA-positive patients had cancers traditionally associated with the mutation. “There were no patients with PTEN mutations treated, and interestingly, no patients with NF1 were treated,” she said. “But actionability is evolving, as the MEK inhibitor selumitinib was recently approved for NF1.”
Some questions remain unanswered, she noted, such as: “What percentage of patients undergoing tumor-normal testing signed a germline protocol?” and “Does the population introduce a bias – such as younger patients, family history, and so on?”
It is also unknown what percentage of germline alterations were known in comparison with those identified through tumor/normal testing. Also of importance is the fact that in this study, the results of germline testing were delivered in an academic setting, she emphasized. “What if they were delivered elsewhere? What would be the impact of identifying these alterations in an environment with less access to trials?
“But to be fair, it is not easy to seek the germline mutations,” Dr. Meric-Bernstam continued. “These studies were done under institutional review board protocols, and it is important to note that most profiling is done as standard of care without consenting and soliciting patient preference on the return of germline results.”
An infrastructure is needed to return/counsel/offer cascade testing, and “analyses need to be facilitated to ensure that findings can be acted upon in a timely fashion,” she added.
The study was supported by MSKCC internal funding. Dr. Stadler reported relationships (institutional) with Adverum, Alimera Sciences, Allergan, Biomarin, Fortress Biotech, Genentech/Roche, Novartis, Optos, Regeneron, Regenxbio, and Spark Therapeutics. Dr. Meric-Bernstram reported relationships with numerous pharmaceutical companies.
This article first appeared on Medscape.com.
The study involved 11,974 patients with various tumor types. All the patients underwent germline genetic testing from 2015 to 2019 at the Memorial Sloan Kettering Cancer Center (MSKCC) in New York, using the next-generation sequencing panel MSK-IMPACT.
This testing showed that 17.1% of patients had variants in cancer predisposition genes, and 7.1%-8.6% had variants that could potentially be targeted.
“Of course, these numbers are not static,” commented lead author Zsofia K. Stadler, MD, a medical oncologist at MSKCC. “And with the emergence of novel targeted treatments with new FDA indications, the therapeutic actionability of germline variants is likely to increase over time.
“Our study demonstrates the first comprehensive assessment of the clinical utility of germline alterations for therapeutic actionability in a population of patients with advanced cancer,” she added.
Dr. Stadler presented the study results during a virtual scientific program of the American Society of Clinical Oncology 2020.
Testing for somatic mutations is evolving as the standard of care in many cancer types, and somatic genomic testing is rapidly becoming an integral part of the regimen for patients with advanced disease. Some studies suggest that 9%-11% of patients harbor actionable genetic alterations, as determined on the basis of tumor profiling.
“The take-home message from this is that now, more than ever before, germline testing is indicated for the selection of cancer treatment,” said Erin Wysong Hofstatter, MD, from Yale University, New Haven, Conn., in a Highlights of the Day session.
An emerging indication for germline testing is the selection of treatment in the advanced setting, she noted. “And it is important to know your test. Remember that tumor sequencing is not a substitute for comprehensive germline testing.”
Implications in cancer treatment
For their study, Dr. Stadler and colleagues reviewed the medical records of patients with likely pathogenic/pathogenic germline (LP/P) alterations in genes that had known therapeutic targets so as to identify germline-targeted treatment either in a clinical or research setting.
“Since 2015, patients undergoing MSK-IMPACT may also choose to provide additional consent for secondary germline genetic analysis, wherein up to 88 genes known to be associated with cancer predisposition are analyzed,” she said. “Likely pathogenic and pathogenic germline alterations identified are disclosed to the patient and treating physician via the Clinical Genetic Service.”
A total of 2043 (17.1%) patients who harbored LP/P variants in a cancer predisposition gene were identified. Of these, 11% of patients harbored pathogenic alterations in high or moderate penetrance cancer predisposition genes. When the analysis was limited to genes with targeted therapeutic actionability, or what the authors defined as tier 1 and tier 2 genes, 7.1% of patients (n = 849) harbored a targetable pathogenic germline alteration.
BRCA alterations accounted for half (52%) of the findings, and 20% were associated with Lynch syndrome.
The tier 2 genes, which included PALB2, ATM, RAD51C, and RAD51D, accounted for about a quarter of the findings. Dr. Hofstatter noted that, using strict criteria, 7.1% of patients (n = 849) were found to harbor a pathogenic alteration and a targetable gene. Using less stringent criteria, additional tier 3 genes and additional genes associated with DNA homologous recombination repair brought the number up to 8.6% (n = 1,003).
Therapeutic action
For determining therapeutic actionability, the strict criteria were used; 593 patients (4.95%) with recurrent or metastatic disease were identified. For these patients, consideration of a targeted therapy, either as part of standard care or as part of an investigation or research protocol, was important.
Of this group, 44% received therapy targeting the germline alteration. Regarding specific genes, 50% of BRCA1/2 carriers and 58% of Lynch syndrome patients received targeted treatment. With respect to tier 2 genes, 40% of patients with PALB2, 19% with ATM, and 37% with RAD51C or 51D received a poly (ADP-ribose) polymerase (PARP) inhibitor.
Among patients with a BRCA1/2 mutation who received a PARP inhibitor, 55.1% had breast or ovarian cancer, and 44.8% had other tumor types, including pancreas, prostate, bile duct, gastric cancers. These patients received the drug in a research setting.
For patients with PALB2 alterations who received PARP inhibitors, 53.3% had breast or pancreas cancer, and 46.7% had cancer of the prostate, ovary, or an unknown primary.
Looking ahead
The discussant for the paper, Funda Meric-Bernstam, MD, chair of the Department of Investigational Cancer Therapeutics at the University of Texas MD Anderson Cancer Center, Houston, pointed out that most of the BRCA-positive patients had cancers traditionally associated with the mutation. “There were no patients with PTEN mutations treated, and interestingly, no patients with NF1 were treated,” she said. “But actionability is evolving, as the MEK inhibitor selumitinib was recently approved for NF1.”
Some questions remain unanswered, she noted, such as: “What percentage of patients undergoing tumor-normal testing signed a germline protocol?” and “Does the population introduce a bias – such as younger patients, family history, and so on?”
It is also unknown what percentage of germline alterations were known in comparison with those identified through tumor/normal testing. Also of importance is the fact that in this study, the results of germline testing were delivered in an academic setting, she emphasized. “What if they were delivered elsewhere? What would be the impact of identifying these alterations in an environment with less access to trials?
“But to be fair, it is not easy to seek the germline mutations,” Dr. Meric-Bernstam continued. “These studies were done under institutional review board protocols, and it is important to note that most profiling is done as standard of care without consenting and soliciting patient preference on the return of germline results.”
An infrastructure is needed to return/counsel/offer cascade testing, and “analyses need to be facilitated to ensure that findings can be acted upon in a timely fashion,” she added.
The study was supported by MSKCC internal funding. Dr. Stadler reported relationships (institutional) with Adverum, Alimera Sciences, Allergan, Biomarin, Fortress Biotech, Genentech/Roche, Novartis, Optos, Regeneron, Regenxbio, and Spark Therapeutics. Dr. Meric-Bernstram reported relationships with numerous pharmaceutical companies.
This article first appeared on Medscape.com.
FROM ASCO 2020
Trastuzumab deruxtecan proves active in HER2-mutated NSCLC
, an investigator reported.
The overall response rate (ORR) exceeded 60% among these heavily pretreated patients, with an estimated median progression-free survival (PFS) of 14 months, according to Egbert F. Smit, MD, PhD, of the Netherlands Cancer Institute.
Interstitial lung disease is an identified risk associated with T-DXd treatment, though the events in the DESTINY-Lung01 trial have been low-grade and have not resulted in any deaths, Dr. Smit said when presenting results from the trial as part of the American Society of Clinical Oncology virtual scientific program.
“These data demonstrate the potential of T-DXd as a new treatment option for patients with HER2-mutated non–small-cell lung cancer,” Dr. Smit said.
‘A good targeted therapy’
The findings are a “nice early confirmation” of the initial results seen with T-DXd in an earlier, smaller, phase 1 population, said invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y.
“Trastuzumab-DXd showed clinical outcomes that meet the standards of what we expect a good targeted therapy should have in terms of overall response rate and progression free survival,” Dr. Dy said.
She noted that the ORR in DESTINY-Lung01 exceeds a 23% ORR seen among NSCLC patients treated with dual HER2-targeted therapy – trastuzumab plus pertuzumab – in a basket trial (J Clin Oncol. 2018 Feb 20;36[6]:536-42). Moreover, the response and PFS data “far surpass” results seen to date with oral tyrosine kinase inhibitors, including pyrotinib, poziotinib, neratinib, and afatinib.
The T-DXd results also look favorable in comparison to another antibody-drug conjugate, ado trastuzumab emtansine, Dr. Dy added, referencing another basket trial in which investigators reported an ORR of 44% and a median PFS of 5 months among 18 patients with advanced HER2-mutant lung adenocarcinomas (J Clin Oncol. 2018 Aug 20;36[24]:2532-7).
“Although T-DM1 [ado trastuzumab emtansine] demonstrated some degree of activity, its lower dosing, which was limited by the payload, lower drug-antibody ratio, and shorter half-life likely explain why results were better with T-DXd,” Dr. Dy said.
T-DXd was, in fact, designed to deliver an optimal antitumor effect, according to Dr. Smit.
The treatment incorporates a humanized anti-HER2 IgG1 monoclonal antibody that has the same amino acid sequence as trastuzumab. The antibody is attached via a cleavable, tumor-selective linker to a payload of deruxtecan, a topoisomerase I inhibitor.
The resulting antibody-drug conjugate has a high drug-to-antibody ratio, with 8 DXd molecules per monoclonal antibody, according to Dr. Smit.
Study details
The DESTINY-Lung01 trial included 42 patients with HER2-mutated NSCLC who received T-DXd at a dose of 6.4 mg/kg every 3 weeks. The patients’ median age was 63 years, and about 64% were female. Eastern Cooperative Oncology Group performance status was 0 in about one-quarter of the patients, and 1 in the remainder.
Patients had received up to six prior lines of treatment, including platinum-based chemotherapy in about 91%, a PD-1 or PD-L1 inhibitor in 55%, and docetaxel in 19%.
The confirmed ORR by independent central review was 61.9% (26/42). That included a single complete response (2.4%) and 25 partial responses (59.5%).
The duration of response was not reached (95% CI, 5.3 months to not estimable), and the median PFS was 14.0 months (95% CI, 6.4-14.0 months).
All patients experienced a treatment-related adverse event. Treatment-related events of grade 3 or greater were seen in 22 patients (52%). These mainly included decreased neutrophil count, anemia, nausea, vomiting, and fatigue.
There were five cases of interstitial lung disease, all of which were grade 2. In four cases, T-DXd was withdrawn. In one case, the drug was interrupted. All patients were treated with steroids.
“Two [patients] recovered, one recovered with sequelae, one was recovering, and one had not recovered by data cutoff,” Dr. Smit said.
DESTINY-Lung01 also includes a cohort of patients with HER2-expressing NSCLC not reported at the meeting. Enrollment in the HER2-mutated cohort that was reported has been expanded with another 50 patients to “better characterize the risk-benefit ratio,” Dr. Smit said.
The DESTINY-Lung01 study is sponsored by Daiichi Sankyo Inc. Dr. Smit reported relationships with Daiichi Sankyo and many other companies. Dr. Dy reported disclosures related to Amgen, AstraZeneca/Medimmune, GlaxoSmithKline, Takeda, and Tesaro.
SOURCE: Smit EF et al. ASCO 2020, Abstract 9504.
, an investigator reported.
The overall response rate (ORR) exceeded 60% among these heavily pretreated patients, with an estimated median progression-free survival (PFS) of 14 months, according to Egbert F. Smit, MD, PhD, of the Netherlands Cancer Institute.
Interstitial lung disease is an identified risk associated with T-DXd treatment, though the events in the DESTINY-Lung01 trial have been low-grade and have not resulted in any deaths, Dr. Smit said when presenting results from the trial as part of the American Society of Clinical Oncology virtual scientific program.
“These data demonstrate the potential of T-DXd as a new treatment option for patients with HER2-mutated non–small-cell lung cancer,” Dr. Smit said.
‘A good targeted therapy’
The findings are a “nice early confirmation” of the initial results seen with T-DXd in an earlier, smaller, phase 1 population, said invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y.
“Trastuzumab-DXd showed clinical outcomes that meet the standards of what we expect a good targeted therapy should have in terms of overall response rate and progression free survival,” Dr. Dy said.
She noted that the ORR in DESTINY-Lung01 exceeds a 23% ORR seen among NSCLC patients treated with dual HER2-targeted therapy – trastuzumab plus pertuzumab – in a basket trial (J Clin Oncol. 2018 Feb 20;36[6]:536-42). Moreover, the response and PFS data “far surpass” results seen to date with oral tyrosine kinase inhibitors, including pyrotinib, poziotinib, neratinib, and afatinib.
The T-DXd results also look favorable in comparison to another antibody-drug conjugate, ado trastuzumab emtansine, Dr. Dy added, referencing another basket trial in which investigators reported an ORR of 44% and a median PFS of 5 months among 18 patients with advanced HER2-mutant lung adenocarcinomas (J Clin Oncol. 2018 Aug 20;36[24]:2532-7).
“Although T-DM1 [ado trastuzumab emtansine] demonstrated some degree of activity, its lower dosing, which was limited by the payload, lower drug-antibody ratio, and shorter half-life likely explain why results were better with T-DXd,” Dr. Dy said.
T-DXd was, in fact, designed to deliver an optimal antitumor effect, according to Dr. Smit.
The treatment incorporates a humanized anti-HER2 IgG1 monoclonal antibody that has the same amino acid sequence as trastuzumab. The antibody is attached via a cleavable, tumor-selective linker to a payload of deruxtecan, a topoisomerase I inhibitor.
The resulting antibody-drug conjugate has a high drug-to-antibody ratio, with 8 DXd molecules per monoclonal antibody, according to Dr. Smit.
Study details
The DESTINY-Lung01 trial included 42 patients with HER2-mutated NSCLC who received T-DXd at a dose of 6.4 mg/kg every 3 weeks. The patients’ median age was 63 years, and about 64% were female. Eastern Cooperative Oncology Group performance status was 0 in about one-quarter of the patients, and 1 in the remainder.
Patients had received up to six prior lines of treatment, including platinum-based chemotherapy in about 91%, a PD-1 or PD-L1 inhibitor in 55%, and docetaxel in 19%.
The confirmed ORR by independent central review was 61.9% (26/42). That included a single complete response (2.4%) and 25 partial responses (59.5%).
The duration of response was not reached (95% CI, 5.3 months to not estimable), and the median PFS was 14.0 months (95% CI, 6.4-14.0 months).
All patients experienced a treatment-related adverse event. Treatment-related events of grade 3 or greater were seen in 22 patients (52%). These mainly included decreased neutrophil count, anemia, nausea, vomiting, and fatigue.
There were five cases of interstitial lung disease, all of which were grade 2. In four cases, T-DXd was withdrawn. In one case, the drug was interrupted. All patients were treated with steroids.
“Two [patients] recovered, one recovered with sequelae, one was recovering, and one had not recovered by data cutoff,” Dr. Smit said.
DESTINY-Lung01 also includes a cohort of patients with HER2-expressing NSCLC not reported at the meeting. Enrollment in the HER2-mutated cohort that was reported has been expanded with another 50 patients to “better characterize the risk-benefit ratio,” Dr. Smit said.
The DESTINY-Lung01 study is sponsored by Daiichi Sankyo Inc. Dr. Smit reported relationships with Daiichi Sankyo and many other companies. Dr. Dy reported disclosures related to Amgen, AstraZeneca/Medimmune, GlaxoSmithKline, Takeda, and Tesaro.
SOURCE: Smit EF et al. ASCO 2020, Abstract 9504.
, an investigator reported.
The overall response rate (ORR) exceeded 60% among these heavily pretreated patients, with an estimated median progression-free survival (PFS) of 14 months, according to Egbert F. Smit, MD, PhD, of the Netherlands Cancer Institute.
Interstitial lung disease is an identified risk associated with T-DXd treatment, though the events in the DESTINY-Lung01 trial have been low-grade and have not resulted in any deaths, Dr. Smit said when presenting results from the trial as part of the American Society of Clinical Oncology virtual scientific program.
“These data demonstrate the potential of T-DXd as a new treatment option for patients with HER2-mutated non–small-cell lung cancer,” Dr. Smit said.
‘A good targeted therapy’
The findings are a “nice early confirmation” of the initial results seen with T-DXd in an earlier, smaller, phase 1 population, said invited discussant Grace K. Dy, MD, of Roswell Park Comprehensive Cancer Center in Buffalo, N.Y.
“Trastuzumab-DXd showed clinical outcomes that meet the standards of what we expect a good targeted therapy should have in terms of overall response rate and progression free survival,” Dr. Dy said.
She noted that the ORR in DESTINY-Lung01 exceeds a 23% ORR seen among NSCLC patients treated with dual HER2-targeted therapy – trastuzumab plus pertuzumab – in a basket trial (J Clin Oncol. 2018 Feb 20;36[6]:536-42). Moreover, the response and PFS data “far surpass” results seen to date with oral tyrosine kinase inhibitors, including pyrotinib, poziotinib, neratinib, and afatinib.
The T-DXd results also look favorable in comparison to another antibody-drug conjugate, ado trastuzumab emtansine, Dr. Dy added, referencing another basket trial in which investigators reported an ORR of 44% and a median PFS of 5 months among 18 patients with advanced HER2-mutant lung adenocarcinomas (J Clin Oncol. 2018 Aug 20;36[24]:2532-7).
“Although T-DM1 [ado trastuzumab emtansine] demonstrated some degree of activity, its lower dosing, which was limited by the payload, lower drug-antibody ratio, and shorter half-life likely explain why results were better with T-DXd,” Dr. Dy said.
T-DXd was, in fact, designed to deliver an optimal antitumor effect, according to Dr. Smit.
The treatment incorporates a humanized anti-HER2 IgG1 monoclonal antibody that has the same amino acid sequence as trastuzumab. The antibody is attached via a cleavable, tumor-selective linker to a payload of deruxtecan, a topoisomerase I inhibitor.
The resulting antibody-drug conjugate has a high drug-to-antibody ratio, with 8 DXd molecules per monoclonal antibody, according to Dr. Smit.
Study details
The DESTINY-Lung01 trial included 42 patients with HER2-mutated NSCLC who received T-DXd at a dose of 6.4 mg/kg every 3 weeks. The patients’ median age was 63 years, and about 64% were female. Eastern Cooperative Oncology Group performance status was 0 in about one-quarter of the patients, and 1 in the remainder.
Patients had received up to six prior lines of treatment, including platinum-based chemotherapy in about 91%, a PD-1 or PD-L1 inhibitor in 55%, and docetaxel in 19%.
The confirmed ORR by independent central review was 61.9% (26/42). That included a single complete response (2.4%) and 25 partial responses (59.5%).
The duration of response was not reached (95% CI, 5.3 months to not estimable), and the median PFS was 14.0 months (95% CI, 6.4-14.0 months).
All patients experienced a treatment-related adverse event. Treatment-related events of grade 3 or greater were seen in 22 patients (52%). These mainly included decreased neutrophil count, anemia, nausea, vomiting, and fatigue.
There were five cases of interstitial lung disease, all of which were grade 2. In four cases, T-DXd was withdrawn. In one case, the drug was interrupted. All patients were treated with steroids.
“Two [patients] recovered, one recovered with sequelae, one was recovering, and one had not recovered by data cutoff,” Dr. Smit said.
DESTINY-Lung01 also includes a cohort of patients with HER2-expressing NSCLC not reported at the meeting. Enrollment in the HER2-mutated cohort that was reported has been expanded with another 50 patients to “better characterize the risk-benefit ratio,” Dr. Smit said.
The DESTINY-Lung01 study is sponsored by Daiichi Sankyo Inc. Dr. Smit reported relationships with Daiichi Sankyo and many other companies. Dr. Dy reported disclosures related to Amgen, AstraZeneca/Medimmune, GlaxoSmithKline, Takeda, and Tesaro.
SOURCE: Smit EF et al. ASCO 2020, Abstract 9504.
FROM ASCO 2020
First-line nivolumab plus platinum/etoposide effective in extensive-stage SCLC
While nivolumab plus doublet chemotherapy was effective in extensive-stage small-cell lung cancer (ES-SCLC) in a recent randomized trial, the results might not be sufficient to change current clinical practice, in which two first-line chemo-immunotherapies are already approved and recommended, sources said.
Nivolumab added to platinum/etoposide doublet chemotherapy was well tolerated and significantly improved progression-free survival (PFS) and overall survival (OS) compared to chemotherapy alone, according to results of ECOG-ACRIN EA5161, a randomized, phase 2 trial including 160 patients with ES-SCLC.
Risks of progression and death were reduced by 32% and 27%, respectively, when the immune checkpoint inhibitor was given along with chemotherapy, according to data presented by investigator Ticiana A. Leal, MD, of the University of Wisconsin Carbone Cancer Center in Madison.
“Our study, EA5161, confirms the efficacy of nivolumab in extensive-stage small cell lung cancer,” Dr. Leal said in a presentation she gave as part of the American Society of Clinical Oncology virtual scientific program.
Nivolumab did demonstrate a clear PFS advantage in EA5161, but “more surprisingly for a small trial” it also showed a clear OS advantage, said Taofeek K. Owonikoko, MD, PhD, in a commentary on the study.
“While the study as currently reported is insufficient to change practice, it does however provide very strong data to make the combination of nivolumab and platinum doublet acceptable as a platform for future clinical trials,” he said in the commentary, which was also included in the virtual ASCO proceedings.
Going forward, it would be difficult to justify another nondefinitive randomized phase 2 chemo-immunotherapy trial, especially if there are no “immediate plans” for a confirmatory phase 3 trial, added Dr. Owonikoko, who is director of thoracic oncology at Winship Cancer Institute of Emory University in Atlanta.
Nivolumab wasn’t the only immune checkpoint with new first-line data in ES-SCLC at ASCO. In the randomized, double-blind, phase 3 KEYNOTE-604 trial, pembrolizumab added to etoposide and platinum significantly prolonged PFS and showed a trend toward improved OS. However, the significance threshold for OS was missed, according to the report.
While these pembrolizumab data are also insufficient to change today’s practice standards, results for both the pembrolizumab- and nivolumab-containing regimens are nevertheless compelling to support their use as a platform for new treatment strategies, according to Dr. Owonikoko.
With these new ASCO data, there are now randomized data confirming a benefit of immune checkpoint inhibitor–based regimens in ES-SCLC, according to Lauren A. Byers, MD, from the department of thoracic/head and neck medical oncology at The University of Texas MD Anderson Cancer Center in Houston.
Immune checkpoint inhibitors that are approved by the Food and Drug Administration for first-line treatment of ES-SCLC include atezolizumab (in combination with carboplatin and etoposide) and durvalumab (in combination with either carboplatin or cisplatin plus etoposide). In current National Comprehensive Cancer Network (NCCN) guidelines, both are described as “preferred” regimens for primary or adjuvant therapy.
“A lot of times in oncology we have trials with similar drugs, and you get somewhat different answers in terms of the outcome of the trials, so we’re kind of trying to tease them apart,” Dr. Byers said in an interview.
“I think in this situation, we’ve got four studies, and they essentially are extremely similar in terms of the result, which just gives us even more confidence that there is benefit, at least for a subset of patients.”
The EA5161 study was developed to evaluate the role of nivolumab in ES-SCLC, Dr. Leal said in her virtual ASCO presentation.
Of the 160 patients enrolled and randomized, 145 were eligible and treated, including 75 in the nivolumab plus chemotherapy arm and 70 in the chemotherapy arm. Participants were evenly split between performance status 0 and 1, and little more than half of patients were women, and a median of five treatment cycles were delivered in each arm.
Median PFS, the primary end point of the trial, was 5.5 months for nivolumab plus chemotherapy versus 4.7 months for chemotherapy alone for all eligible and treated patients (hazard ratio, 0.68; 95% confidence interval, 0.48-1.00; P = .047). In the intent-to-treat population, median PFS was 5.5 and 4.6 months in the respective arms (HR, 0.65; 95% CI, 0.46-0.91; P = .012).
Median overall survival was 11.3 months and 9.3 months for the nivolumab plus chemotherapy and chemotherapy-only arms, respectively, for all eligible and treated patients (HR, 0.73; 95% CI, 0.49-1.1), and in the intent-to-treat population, median OS was 11.3 and 8.5 months for the respective arms (HR, 0.67; 95% CI, 0.46-0.98; P = .038).
The overall response rate was 52% for nivolumab plus chemotherapy and 47% for chemotherapy alone, with a median duration of response of 5.6 and 3.3 months, respectively, Dr. Leal reported.
Treatment was generally well tolerated in both arms, according to the investigator, with no safety signals observed. Toxicities resulting in death occurred in nine patients in the nivolumab plus chemotherapy arm and seven in the chemotherapy-only arm. “Most of the events were related to progression of disease,” Dr. Leal said.
While nivolumab and pembrolizumab’s use in the first-line setting may be uncertain, it is currently approved for metastatic SCLC that has progressed following platinum-based chemotherapy and at least one more line of therapy, according to the drug’s package insert.
The EA5161 study was sponsored by the National Cancer Institute. Dr. Leal provided disclosures related to AbbVie, AstraZeneca, Bayer, BeyondSpring, Bristol-Myers Squibb, Genentech, InvisionFirst Lung, Merck, Mirati, Novocure, and Takeda.
Dr. Owonikoko provided disclosures related to Bristol-Myers Squibb, Novartis, Celgene, Lilly, Sandoz, AbbVie, Eisai, and Takeda, among others. Dr. Byers reported disclosures related to Bristol-Myers Squibb, AstraZeneca, AbbVie, GenMab, PharmaMar, and Sierra Oncology, Tolero, Alethia, Merck, Jazz Pharmaceuticals, and Pfizer.
SOURCE: Leal TA et al. ASCO 2020, Abstract 9000.
While nivolumab plus doublet chemotherapy was effective in extensive-stage small-cell lung cancer (ES-SCLC) in a recent randomized trial, the results might not be sufficient to change current clinical practice, in which two first-line chemo-immunotherapies are already approved and recommended, sources said.
Nivolumab added to platinum/etoposide doublet chemotherapy was well tolerated and significantly improved progression-free survival (PFS) and overall survival (OS) compared to chemotherapy alone, according to results of ECOG-ACRIN EA5161, a randomized, phase 2 trial including 160 patients with ES-SCLC.
Risks of progression and death were reduced by 32% and 27%, respectively, when the immune checkpoint inhibitor was given along with chemotherapy, according to data presented by investigator Ticiana A. Leal, MD, of the University of Wisconsin Carbone Cancer Center in Madison.
“Our study, EA5161, confirms the efficacy of nivolumab in extensive-stage small cell lung cancer,” Dr. Leal said in a presentation she gave as part of the American Society of Clinical Oncology virtual scientific program.
Nivolumab did demonstrate a clear PFS advantage in EA5161, but “more surprisingly for a small trial” it also showed a clear OS advantage, said Taofeek K. Owonikoko, MD, PhD, in a commentary on the study.
“While the study as currently reported is insufficient to change practice, it does however provide very strong data to make the combination of nivolumab and platinum doublet acceptable as a platform for future clinical trials,” he said in the commentary, which was also included in the virtual ASCO proceedings.
Going forward, it would be difficult to justify another nondefinitive randomized phase 2 chemo-immunotherapy trial, especially if there are no “immediate plans” for a confirmatory phase 3 trial, added Dr. Owonikoko, who is director of thoracic oncology at Winship Cancer Institute of Emory University in Atlanta.
Nivolumab wasn’t the only immune checkpoint with new first-line data in ES-SCLC at ASCO. In the randomized, double-blind, phase 3 KEYNOTE-604 trial, pembrolizumab added to etoposide and platinum significantly prolonged PFS and showed a trend toward improved OS. However, the significance threshold for OS was missed, according to the report.
While these pembrolizumab data are also insufficient to change today’s practice standards, results for both the pembrolizumab- and nivolumab-containing regimens are nevertheless compelling to support their use as a platform for new treatment strategies, according to Dr. Owonikoko.
With these new ASCO data, there are now randomized data confirming a benefit of immune checkpoint inhibitor–based regimens in ES-SCLC, according to Lauren A. Byers, MD, from the department of thoracic/head and neck medical oncology at The University of Texas MD Anderson Cancer Center in Houston.
Immune checkpoint inhibitors that are approved by the Food and Drug Administration for first-line treatment of ES-SCLC include atezolizumab (in combination with carboplatin and etoposide) and durvalumab (in combination with either carboplatin or cisplatin plus etoposide). In current National Comprehensive Cancer Network (NCCN) guidelines, both are described as “preferred” regimens for primary or adjuvant therapy.
“A lot of times in oncology we have trials with similar drugs, and you get somewhat different answers in terms of the outcome of the trials, so we’re kind of trying to tease them apart,” Dr. Byers said in an interview.
“I think in this situation, we’ve got four studies, and they essentially are extremely similar in terms of the result, which just gives us even more confidence that there is benefit, at least for a subset of patients.”
The EA5161 study was developed to evaluate the role of nivolumab in ES-SCLC, Dr. Leal said in her virtual ASCO presentation.
Of the 160 patients enrolled and randomized, 145 were eligible and treated, including 75 in the nivolumab plus chemotherapy arm and 70 in the chemotherapy arm. Participants were evenly split between performance status 0 and 1, and little more than half of patients were women, and a median of five treatment cycles were delivered in each arm.
Median PFS, the primary end point of the trial, was 5.5 months for nivolumab plus chemotherapy versus 4.7 months for chemotherapy alone for all eligible and treated patients (hazard ratio, 0.68; 95% confidence interval, 0.48-1.00; P = .047). In the intent-to-treat population, median PFS was 5.5 and 4.6 months in the respective arms (HR, 0.65; 95% CI, 0.46-0.91; P = .012).
Median overall survival was 11.3 months and 9.3 months for the nivolumab plus chemotherapy and chemotherapy-only arms, respectively, for all eligible and treated patients (HR, 0.73; 95% CI, 0.49-1.1), and in the intent-to-treat population, median OS was 11.3 and 8.5 months for the respective arms (HR, 0.67; 95% CI, 0.46-0.98; P = .038).
The overall response rate was 52% for nivolumab plus chemotherapy and 47% for chemotherapy alone, with a median duration of response of 5.6 and 3.3 months, respectively, Dr. Leal reported.
Treatment was generally well tolerated in both arms, according to the investigator, with no safety signals observed. Toxicities resulting in death occurred in nine patients in the nivolumab plus chemotherapy arm and seven in the chemotherapy-only arm. “Most of the events were related to progression of disease,” Dr. Leal said.
While nivolumab and pembrolizumab’s use in the first-line setting may be uncertain, it is currently approved for metastatic SCLC that has progressed following platinum-based chemotherapy and at least one more line of therapy, according to the drug’s package insert.
The EA5161 study was sponsored by the National Cancer Institute. Dr. Leal provided disclosures related to AbbVie, AstraZeneca, Bayer, BeyondSpring, Bristol-Myers Squibb, Genentech, InvisionFirst Lung, Merck, Mirati, Novocure, and Takeda.
Dr. Owonikoko provided disclosures related to Bristol-Myers Squibb, Novartis, Celgene, Lilly, Sandoz, AbbVie, Eisai, and Takeda, among others. Dr. Byers reported disclosures related to Bristol-Myers Squibb, AstraZeneca, AbbVie, GenMab, PharmaMar, and Sierra Oncology, Tolero, Alethia, Merck, Jazz Pharmaceuticals, and Pfizer.
SOURCE: Leal TA et al. ASCO 2020, Abstract 9000.
While nivolumab plus doublet chemotherapy was effective in extensive-stage small-cell lung cancer (ES-SCLC) in a recent randomized trial, the results might not be sufficient to change current clinical practice, in which two first-line chemo-immunotherapies are already approved and recommended, sources said.
Nivolumab added to platinum/etoposide doublet chemotherapy was well tolerated and significantly improved progression-free survival (PFS) and overall survival (OS) compared to chemotherapy alone, according to results of ECOG-ACRIN EA5161, a randomized, phase 2 trial including 160 patients with ES-SCLC.
Risks of progression and death were reduced by 32% and 27%, respectively, when the immune checkpoint inhibitor was given along with chemotherapy, according to data presented by investigator Ticiana A. Leal, MD, of the University of Wisconsin Carbone Cancer Center in Madison.
“Our study, EA5161, confirms the efficacy of nivolumab in extensive-stage small cell lung cancer,” Dr. Leal said in a presentation she gave as part of the American Society of Clinical Oncology virtual scientific program.
Nivolumab did demonstrate a clear PFS advantage in EA5161, but “more surprisingly for a small trial” it also showed a clear OS advantage, said Taofeek K. Owonikoko, MD, PhD, in a commentary on the study.
“While the study as currently reported is insufficient to change practice, it does however provide very strong data to make the combination of nivolumab and platinum doublet acceptable as a platform for future clinical trials,” he said in the commentary, which was also included in the virtual ASCO proceedings.
Going forward, it would be difficult to justify another nondefinitive randomized phase 2 chemo-immunotherapy trial, especially if there are no “immediate plans” for a confirmatory phase 3 trial, added Dr. Owonikoko, who is director of thoracic oncology at Winship Cancer Institute of Emory University in Atlanta.
Nivolumab wasn’t the only immune checkpoint with new first-line data in ES-SCLC at ASCO. In the randomized, double-blind, phase 3 KEYNOTE-604 trial, pembrolizumab added to etoposide and platinum significantly prolonged PFS and showed a trend toward improved OS. However, the significance threshold for OS was missed, according to the report.
While these pembrolizumab data are also insufficient to change today’s practice standards, results for both the pembrolizumab- and nivolumab-containing regimens are nevertheless compelling to support their use as a platform for new treatment strategies, according to Dr. Owonikoko.
With these new ASCO data, there are now randomized data confirming a benefit of immune checkpoint inhibitor–based regimens in ES-SCLC, according to Lauren A. Byers, MD, from the department of thoracic/head and neck medical oncology at The University of Texas MD Anderson Cancer Center in Houston.
Immune checkpoint inhibitors that are approved by the Food and Drug Administration for first-line treatment of ES-SCLC include atezolizumab (in combination with carboplatin and etoposide) and durvalumab (in combination with either carboplatin or cisplatin plus etoposide). In current National Comprehensive Cancer Network (NCCN) guidelines, both are described as “preferred” regimens for primary or adjuvant therapy.
“A lot of times in oncology we have trials with similar drugs, and you get somewhat different answers in terms of the outcome of the trials, so we’re kind of trying to tease them apart,” Dr. Byers said in an interview.
“I think in this situation, we’ve got four studies, and they essentially are extremely similar in terms of the result, which just gives us even more confidence that there is benefit, at least for a subset of patients.”
The EA5161 study was developed to evaluate the role of nivolumab in ES-SCLC, Dr. Leal said in her virtual ASCO presentation.
Of the 160 patients enrolled and randomized, 145 were eligible and treated, including 75 in the nivolumab plus chemotherapy arm and 70 in the chemotherapy arm. Participants were evenly split between performance status 0 and 1, and little more than half of patients were women, and a median of five treatment cycles were delivered in each arm.
Median PFS, the primary end point of the trial, was 5.5 months for nivolumab plus chemotherapy versus 4.7 months for chemotherapy alone for all eligible and treated patients (hazard ratio, 0.68; 95% confidence interval, 0.48-1.00; P = .047). In the intent-to-treat population, median PFS was 5.5 and 4.6 months in the respective arms (HR, 0.65; 95% CI, 0.46-0.91; P = .012).
Median overall survival was 11.3 months and 9.3 months for the nivolumab plus chemotherapy and chemotherapy-only arms, respectively, for all eligible and treated patients (HR, 0.73; 95% CI, 0.49-1.1), and in the intent-to-treat population, median OS was 11.3 and 8.5 months for the respective arms (HR, 0.67; 95% CI, 0.46-0.98; P = .038).
The overall response rate was 52% for nivolumab plus chemotherapy and 47% for chemotherapy alone, with a median duration of response of 5.6 and 3.3 months, respectively, Dr. Leal reported.
Treatment was generally well tolerated in both arms, according to the investigator, with no safety signals observed. Toxicities resulting in death occurred in nine patients in the nivolumab plus chemotherapy arm and seven in the chemotherapy-only arm. “Most of the events were related to progression of disease,” Dr. Leal said.
While nivolumab and pembrolizumab’s use in the first-line setting may be uncertain, it is currently approved for metastatic SCLC that has progressed following platinum-based chemotherapy and at least one more line of therapy, according to the drug’s package insert.
The EA5161 study was sponsored by the National Cancer Institute. Dr. Leal provided disclosures related to AbbVie, AstraZeneca, Bayer, BeyondSpring, Bristol-Myers Squibb, Genentech, InvisionFirst Lung, Merck, Mirati, Novocure, and Takeda.
Dr. Owonikoko provided disclosures related to Bristol-Myers Squibb, Novartis, Celgene, Lilly, Sandoz, AbbVie, Eisai, and Takeda, among others. Dr. Byers reported disclosures related to Bristol-Myers Squibb, AstraZeneca, AbbVie, GenMab, PharmaMar, and Sierra Oncology, Tolero, Alethia, Merck, Jazz Pharmaceuticals, and Pfizer.
SOURCE: Leal TA et al. ASCO 2020, Abstract 9000.
FROM ASCO 2020