Cullinan Oncology, Inc. announced that the first patient has been dosed with CLN-617 in a Phase 1 clinical trial. This is a first-in-human, multi-center, open label study designed to evaluate the safety, pharmacokinetics (PK), pharmacodynamics (PD), and preliminary efficacy of CLN-617 alone and in combination with pembrolizumab, a programmed death receptor-1 (PD-1) targeted checkpoint inhibitor, in patients with advanced solid tumors.