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MA09 - Immunotherapy Combinations (ID 390)
- Event: WCLC 2016
- Type: Mini Oral Session
- Track: Chemotherapy/Targeted Therapy/Immunotherapy
- Presentations: 1
MA09.02 - Pembrolizumab + Carboplatin and Pemetrexed as 1st-Line Therapy for Advanced Non–Small Cell Lung Cancer: KEYNOTE-021 Cohort G (ID 5787)
14:20 - 15:50 | Author(s): S. Powell
Platinum doublet chemotherapy ± bevacizumab is standard first-line therapy for patients with advanced non–small cell lung cancer (NSCLC) without genetic aberrations. Single-agent pembrolizumab exhibits robust antitumor activity in PD-L1–positive advanced NSCLC. Cohort G of the multicenter, open-label, phase 1/2 multicohort KEYNOTE-021 study (ClinicalTrials.gov, NCT02039674) evaluated the efficacy and safety of pembrolizumab + carboplatin and pemetrexed compared with carboplatin and pemetrexed in patients with treatment-naive advanced nonsquamous NSCLC with any PD-L1 expression.
Cohort G enrollment criteria included patients with stage IIIB/IV nonsquamous NSCLC, no activating EGFR mutation or ALK translocation, no prior systemic therapy, measurable disease, ECOG performance status 0-1, and adequate tumor sample for assessment of PD-L1 status, regardless of PD-L1 expression. Patients were randomized 1:1 to 4 cycles of pembrolizumab 200 mg Q3W + carboplatin AUC 5 (5 mg/mL/min) + pemetrexed 500 mg/m Q3W or carboplatin AUC 5 (5 mg/mL/min) + pemetrexed 500 mg/m Q3W alone, followed by maintenance pemetrexed ± pembrolizumab. Pembrolizumab was given for ≤35 cycles. Randomization was stratified by PD-L1 expression (positive [tumor proportion score, or TPS, ≥1%] vs negative [TPS <1%]). Crossover to pembrolizumab monotherapy was allowed for eligible patients who experienced disease progression (RECIST v1.1) on chemotherapy. Response was assessed by central imaging vendor review every 6 weeks for first 18 weeks, every 9 weeks through year 1, and every 12 weeks in year 2. The primary end point was objective response rate (ORR); secondary end points included progression-free survival (PFS), duration of response, and overall survival (OS). Comparison between arms was assessed using the stratified Miettinen and Nurminen method (ORR) and stratified log-rank test (PFS, OS).
As of January 2016, 123 patients (60 in the pembrolizumab + chemotherapy arm, 63 in the chemotherapy arm) had been enrolled in cohort G. Data on ORR, duration of response, safety, and preliminary PFS and OS results will be available by August 2016.
The conclusion will be updated at the late-breaking submission stage.
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