A Clinical Trial of KVA12123 [TBS-2025] Treatment Alone and in Combination With Pembrolizumab In Advanced Solid Tumors (VISTA-101)

This is a first-in-human (FIH), Phase 1/2, open-label, multicenter, dose escalation, and dose expansion study designed to evaluate the safety, tolerability, PK, immunogenicity, and tumor response of the investigational drug KVA12123 alone and in combination with pembrolizumab in adults with relapsed or refractory advanced solid tumors. The study will be conducted in 4 parts: Parts A and B will focus on dose escalation (single-agent and in combination), and Parts C and D will focus on dose expansion (single-agent and in combination). Parts A (single-agent KVA12123) and B (KVA12123 + pembrolizumab) will comprise up to 10 dose escalation cohorts (6 for Part A and 4 for Part B) and treat 1-6 participants in each cohort to characterize the safety, tolerability, pharmacodynamics (PD), pharmacokinetics (PK) and preliminary tumor responses of study interventions. The objective of Parts A and B will be to determine a recommended Phase 2 dose (RP2D) for Parts C and D. Parts C (single-agent KVA12123) and D (KVA12123 + pembrolizumab) will comprise up to 7 disease-specific dose expansion cohorts (2 for Part C and 5 for Part D), which will commence at the RP2D to further characterize the safety, tolerability, PD, PK, and preliminary tumor response of KVA12123 alone and in combination with pembrolizumab.