Microsatellite Instability clinical trials at UCLA

Solid tumours are abnormal lumps of tissue that can occur in different parts of the body. The tumours involved in this study have specific genetic characteristics that can make them more aggressive and challenging to treat. The study will test whether GSK4418959 alone or in combination with a PD-1 inhibitor agent can decrease tumor size, is safe, well-tolerated, and how amounts of the study drug decrease in the body over time.

The main purpose of the study is to evaluate the safety and tolerability of HRO761 and identify the recommended dose(s), i.e., the optimal safe and active dose of HRO761 alone or in combination with pembrolizumab or irinotecan that can be given to patients who have cancers with specific molecular alterations called MSIhi (Microsatellite Instability-high) or dMMR (Mismatch Repair Deficient) that might work best to treat these specific cancer types and to understand how well HRO761 is able to treat those cancers.

The Phase 2 study is a multicenter, open-label study of RP1 to further investigate safety and to estimate the efficacy of RP1 at the RP2D in combination with nivolumab in patients with Stage IIIb-IV unresectable melanoma, microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) solid tumors, non-melanoma skin cancer (NMSC), and non-small cell lung cancer (NSCLC).