Rezatapopt Shows Early Promise in TP53 Y220C-Mutant Tumors in PYNNACLE Phase II Trial on December 01, 2025 Familial mitral valve prolapse ORR ovarian neoplasm p53 reactivator Phase 2 Clinical Trials PYNNACLE trial Rezatapopt Solid Neoplasm Targeted Therapy TP53 gene Y220C mutation +