Trilaciclib Ph 3 PRESERVE 1 trial in CRC patients to discontinue after absence of efficacy signals in early data

“PRESERVE 1 is the first clinical evaluation of trilaciclib in a 5-FU-based chemotherapeutic backbone,” said Raj Malik, M.D., G1 Therapeutics’ Chief Medical Officer. “This study reaffirms that trilaciclib is a highly effective drug for myeloprotection that all but eliminated neutropenia as a concern for patients with CRC in the trial, which helps inform our ongoing combination studies with other highly myelotoxic regimens like ADCs. Unfortunately, despite the robust myeloprotection and improved tolerability, early survival indicators, including the observed overall response rate in this trial, favor patients receiving placebo. These results in PRESERVE 1 are inconsistent with what we’ve observed in other tumors with different chemotherapy backbones. As a result of these topline results, we have made the decision to terminate this study. While we are disappointed, we are grateful for the patients, clinical investigators and their office staff, our partner Simcere, and the G1 team—all of whom contributed to the conduct of this trial.”