Each part of the study consists of 3 periods: screening (up to 28 days), treatment and follow-up. After an initial screening period, ASKG315 or ASKG315 combined with pembrolizumab will be administered once every 3 weeks by intravenous (IV) infusion. The Part 1 dose escalation consists of 6 planned escalation cohorts, with a starting dose of 3 mg. The Part 2 dose escalation consists of 4 planned escalation cohorts.~Part 2 of the study will begin enrolling after Part 1 has successfully and safely dosed all patients in the first two cohorts and followed these patients through the entire DLT period. The starting dose of Part 2 will be determined according to the safety and PK of ASKG315 in Part 1 of the study, but in no case will it exceed the highest dose already safely administered in Part 1 and confirmed as tolerable by the Safety Review Committee in Part 1.
The study is a Phase 1, open-label, multicenter, dose escalation study to evaluate the safety, tolerability, PK and PD of ASKG315 as a single agent (Part 1) and in combination with pembrolizumab (Part 2) in patients with advanced solid tumors.