Nathan Gamarra Ph.D. (@ngamarra.bsky.social)

D3S-001 in advanced solid tumors with KRASG12C mutations: a phase 1 trial | Nature Medicine D3S-001 is a next-generation KRAS-G12C inhibitor (G12Ci) designed to enhance target engagement efficiency and overcome growth factor-induced nucleotide exchange. D3S-001 was evaluated in a phase 1a dose-escalation study in patients with advanced solid tumors harboring KRASG12C mutation (N = 42) and a phase 1b expansion cohort of patients with non-small-cell lung cancer (NSCLC) whose disease progressed after prior G12Ci therapy (N = 20). The primary endpoints were safety and determination of the maximum tolerated dose. Secondary endpoints included pharmacokinetics, confirmed objective response rate (ORR) and disease control rate. D3S-001 demonstrated dose-dependent pharmacokinetics and no dose-limiting toxicities, and the maximum tolerated dose was not reached. Grade 3 treatment-related adverse events were reported in seven patients (16.7%) in the G12Ci-naive dose-escalation cohort and two patients (10.0%) in the G12Ci-pretreated NSCLC expansion cohort. There were no grade 4 or 5 treatm https://doi.org/10.1038/s41591-025-03688-6