Lyell Immunopharma Issues LYL273 Safety Profile Update In Its Ongoing U.S. Phase 1 Clinical Trial In Patients With Relapsed Or Refractory Metastatic Colorectal Cancer
Gastrointestinal prophylaxis reduced Grade ≥ 2 diarrhea/colitis from 55% without prophylaxis to 10% with prophylaxis
The maximum tolerated dose has not yet been determined
No difference is observed in GCC CAR T-cell expansion kinetics in patients with or without GI prophylaxis
Ongoing U.S. Phase 1 trial amended to enable seamless expansion into a potential pivotal single-arm Phase 2 trial pending regulatory alignment
Amendment of ongoing U.S. Phase 1 trial adds new cohorts, including a second-line cohort and a cohort evaluating a combination strategy with radiotherapy
Additional Phase 1 clinical data, including clinical outcomes, and End-of-Phase 1 FDA meeting expected in second half of 2026
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