Abstract LB040: Targeting CD38 and PD-1 with isatuximab (Isa) plus cemiplimab (Cemi) in patients (pts) with advanced malignancies: Results from a Phase 1/2 open-label, multicenter study

Background: CD38 is implicated in noncanonical adenosine synthesis and its overexpression on tumor cells has been implicated in T-cell exhaustion and resistance to immune checkpoint blockade. Preclinical data suggest that concurrent treatment of anti-CD38 and anti-PD-1/PD-L1 antibodies substantially reduce primary tumor growth via suppressing acquired resistance to immune checkpoint blockade, and thus enhancing anti-PD-1/PD-L1 efficacy. Methods:...