150P Phase I study of fianlimab: A human lymphocyte activation gene-3 (LAG-3) monoclonal antibody, in combination with cemiplimab in advanced melanoma (mel) - Subgroup analysis

Abstract

Concurrent blockade of LAG-3 may enhance efficacy of anti-programmed cell death-1 (PD-1) therapies. We previously presented safety and efficacy data from the phase 1 study in patients (pts) with advanced mel treated with anti-LAG-3 (fianlimab) in combination with anti-PD-1 (cemiplimab). We demonstrated high clinical activity among pts with anti–PD-1/PD-ligand (L)1-naive (expansion cohort [EC] 6 and 15) advanced mel. Among pts in EC6+EC15 (N=80), the objective response rate (ORR) was 63.8%, the disease control rate (DCR) was 80.0%, and the median duration of response (mDOR) was not reached (NR).