In mCRPC patients with androgen receptor (AR) mutations, treatment with MRT-2359 in combination with enzalutamide led to a 100% PSA response rate (5 of 5 patients) and a 100% disease control rate, including 2 patients with RECIST partial responses and 3 with stable disease, all showing reduction in size of target lesions Across all 15 evaluable patients, the overall RECIST disease control rate was 67%, and 10 of 15 patients showed tumor size reductions of target lesions Combination of MRT-2359 and enzalutamide was generally well-tolerated with primarily Grade 1-2 adverse events (AEs); no treatment discontinuations due to AEs Company plans to initiate a new, signal-confirming Phase 2 study of MRT-2359 targeting AR mutant patients in Q3 2026 Poster presentation on February 26 at 11:30 AM PST BOSTON, Feb. 24, 2026 (GLOBE NEWSWIRE) -- Monte Rosa Therapeutics, Inc. (Nasdaq: GLUE), a clinical-stage biotechnology company developing novel molecular glue degrader (MGD)-based medicines, today announced updated, positive clinical data from an ongoing Phase 1/2 clinical study evaluating MRT-2359 in combination with enzalutamide in heavily pretreated patients with metastatic castration-resistant prostate cancer (mCRPC). The data, being presented at the 2026 ASCO GU Symposium in San Francisco, CA, build on data released by the company in December 2025.
