Summary
This is an open-label, multicenter, Phase 1b platform study in subjects with advanced or
metastatic solid tumors (Part 1a) and subjects with selected solid tumors (Part 1b and
Part 2). Two treatment groups (Group A and Group B) will be evaluated
Part 1a utilizes a 3+3 design to evaluate pembrolizumab and INCB combinations in advanced
solid tumors. Group A will evaluate a JAK inhibitor with JAK1 selectivity itacitinib
(INCB039110) in combination with pembrolizumab (MK-3475) and Group B will evaluate a
PI3K-delta inhibitor (INCB050465) in combination with pembrolizumab to determine the
maximum tolerated dose (MTD) or PAD and recommend a dose for the Part 1b safety expansion
with each combination.
Once the recommended dose has been identified in Part 1a, subjects with select solid
tumor types will be enrolled into safety expansion cohorts based upon prior treatment
history with a PD-1 pathway-targeted agent (Part 1b) for each combination.
Part 2 utilizes a Simon 2-Stage design to evaluate INCB050465 in combination with
pembrolizumab in patients with small cell lung cancer (SCLC) and a 1 stage design to
evaluate the combination in patients with non-small cell lung cancer (NSCLC) and
urothelial cancer (UC).