Recommended Citation
Hamid O, Weise A, Kim TM, McKean MA, Lakhani NJ, Kaczmar J, Papadopoulos KP, Chen S, Mani J, Jankovic V, Kroog G, Sims T, Lowy I, and Gullo G. 790MO Phase I study of fianlimab, a human lymphocyte activation gene-3 (LAG-3) monoclonal antibody, in combination with cemiplimab in advanced melanoma (mel). Ann Oncol 2022; 33:S905.
Document Type
Conference Proceeding
Publication Date
9-1-2022
Publication Title
Ann Oncol
Abstract
Background: Concurrent blockade of LAG-3 may enhance efficacy of anti-programmed cell death-1 (PD-1) therapies. We present updated safety and clinical activity data from patients (pts) with advanced mel treated with concurrent anti-LAG-3 (fianlimab) and anti-PD-1 (cemiplimab).
Methods: This phase 1 study included pts with unresectable or metastatic mel (excluding uveal mel) who were anti–PD-(L)1 treatment naïve (expansion cohort [EC] 6) or anti–PD-(L) 1 experienced within 3 months of screening (EC7). Pts received fianlimab 1600 mg + cemiplimab 350 mg intravenously every 3 weeks for 12 months (optional additional 12 months if clinically indicated). Tumour measurements were performed every 6 weeks for 24 weeks, then every 9 weeks.
Results: As of the 9 Feb 2022 data cutoff date, 40 EC6 and 15 EC7 pts were enrolled and treated with fianlimab + cemiplimab. For EC6 and EC7 cohorts respectively, median age was 69.5 and 59.0 years, 62.5% and 46.7% were male, 90.0% and 60.0% were White. Median treatment duration was 37.1 weeks (EC6) and 9.0 weeks (EC7). Grade ≥3 treatment-emergent adverse events (TEAEs) occurred in 37.5% (EC6) and 46.7% (EC7) of pts; serious TEAEs occurred in 32.5% (EC6) and 33.3% (EC7) of pts; 17.5% (EC6) and 13.3% (EC7) of pts discontinued treatment due to a TEAE. Rate of adrenal insufficiency (AI) was 12.5% (EC6) and 6.7% (EC7); none led to treatment discontinuation. Investigator-assessed objective response rate was 62.5% (6 complete responses; 19 partial responses [PRs]) in EC6 and 13.3% (2 PRs) in EC7 pts. Kaplan-Meier estimation of median progression-free survival was 14.2 (95% CI: 5.6–not estimated) months in EC6 and 1.4 (95% CI: 1.3–7.7) months in EC7 pts. Median duration of response had not been reached in both cohorts. LAG-3 and PD-L1 correlative biomarkers analysis will be included in the presentation.
Conclusions: Fianlimab + cemiplimab in advanced mel pts had a similar safety profile to anti–PD-1 agents; clinical activity in anti-PD-(L)1-naïve patients appears higher than previously reported for anti-PD-1 monotherapy or anti–LAG-3 + anti–PD-1. A phase 3 trial (NCT05352672) investigating fianlimab + cemiplimab in advanced mel pts is ongoing.
Volume
33
First Page
S905
Comments
Clinical trial identification: NCT03005782.