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MA09 - Immunotherapy Combinations (ID 390)
- Event: WCLC 2016
- Type: Mini Oral Session
- Track: Chemotherapy/Targeted Therapy/Immunotherapy
- Presentations: 1
MA09.05 - Nivolumab Alone or with Ipilimumab in Recurrent Small Cell Lung Cancer (SCLC): 2-Year Survival and Updated Analyses from the Checkmate 032 Trial (ID 4397)
14:20 - 15:50 | Author(s): E. Calvo
Patients with SCLC and disease progression during/after first-line platinum-based chemotherapy have poor prognoses and limited treatment options. Nivolumab alone and in combination with ipilimumab has shown survival benefit and durable responses in multiple tumor types. Here we present updated results for the SCLC cohort of the phase 1/2 CheckMate 032 trial (NCT01928394), which was designed to evaluate nivolumab or nivolumab/ipilimumab in advanced solid tumors.
Patients with advanced SCLC that progressed following ≥1 platinum-based chemotherapy regimens were assigned to receive nivolumab monotherapy (nivolumab-3 Q2W) or nivolumab/ipilimumab combination therapy (nivolumab-1/ipilimumab-3 or nivolumab-3/ipilimumab-1 Q3W for 4 cycles, then nivolumab-3 Q2W). Patients were eligible regardless of platinum sensitivity or tumor programmed death ligand 1 (PD-L1) expression. The primary endpoint was ORR. Additional endpoints were duration of response (DOR), OS, PFS, safety, and correlation of tumor PD-L1 expression with activity.
214 patients have been enrolled to date (nivolumab-3, n=98; nivolumab-1/ipilimumab-3, n=61; nivolumab-3/ipilimumab-1, n=55), including 96 and 118 patients treated with 1 or ≥2 prior regimens, respectively. Efficacy and safety data are shown (table). In the nivolumab-1/ipilimumab-3 cohort, ORR was 23% and 1-year OS was 43%. The proportion of patients with PD-L1–expressing tumors was substantially lower in previously treated SCLC in this study than that previously observed with pretreated NSCLC (16% vs 53%–54% with ≥1% PD-L1 expression). In SCLC, responses were observed regardless of PD-L1 expression. ORR and median OS were similar in patients treated with 1 or ≥2 prior regimens. Rate of discontinuation due to treatment-related AEs ranged from 5% to 11%; there were 3 treatment-related deaths. Figure 1
Durable objective responses were observed with nivolumab and nivolumab/ipilimumab in patients with previously treated SCLC, and safety profiles were consistent with other tumor types. Updated efficacy (including 2-year OS and DOR), safety, and additional subgroup analyses will be presented from the August 2016 DBL.
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