Repare Therapeutics Doses First Patient in Phase 1 Clinical Trial of RP-1664

RP-1664 is a Potential First-in-Class, Selective, PLK4 Inhibitor

Excerpt from the Press Release:

CAMBRIDGE, Mass. & MONTREAL–(BUSINESS WIRE)–Repare Therapeutics Inc. (“Repare” or the “Company”) (Nasdaq: RPTX), a leading clinical-stage precision oncology company, today announced the first patient has been dosed in the Company’s Phase 1 LIONS (PLK4 Inhibitor in Advanced Solid Tumors) clinical trial evaluating RP-1664, a potential first-in-class, highly selective, oral polo-like kinase 4 (PLK4) inhibitor, for the monotherapy treatment of adult and adolescent patients enriched for TRIM37-high solid tumors.

“RP-1664 exhibited deep tumor growth inhibition and regressions in multiple TRIM37-high solid tumor and neuroblastoma xenograft models, both internally and in collaboration with Children’s Hospital of Philadelphia. After evaluating safety in the LIONS clinical trial, we expect to move rapidly into a Phase 1/2 clinical trial in high risk, recurrent pediatric neuroblastoma, in which patients have a high prevalence of TRIM37-altered tumors and limited treatment options,” said Maria Koehler, MD, PhD, Executive Vice President and Chief Medical Officer of Repare. “RP-1664 is Repare’s third internally-developed clinical therapeutic candidate, a testament to the productivity of our platform.”

The LIONS clinical trial (NCT06232408) is a first-in-human, multicenter, open-label Phase 1 study to investigate safety, pharmacokinetics, pharmacodynamics and the preliminary efficacy of RP-1664. The clinical trial is expected to enroll approximately 80 patients with molecularly selected advanced solid tumors, including those with gain or amplification of TRIM37, among other genetic alterations. The primary endpoints are to determine the safety, tolerability, dose and schedule of RP-1664 and assess any early antitumor activity.

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