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TulmiSTAR-02: A Phase I/II Open-label Study of Tulmimetostat in Combination With Darolutamide vs. Darolutamide, and Tulmimetostat With Abiraterone in Patients With Metastatic Hormone-sensitive Prostate Cancer (mHSPC)
NotablePrimary endpoint(s) modifiedInterventions modified · Eligibility criteria expanded, about 173 words · Secondary endpoints: 25 to 21 · 2 moreShow 5 more changesShow less
Interventions modified
Eligibility criteria expanded, about 173 words
Secondary endpoints: 25 to 21
Study description expanded, about 208 words
Site details revised at 3 of 31 sites
MinorStudy description shortened, about 14 wordsSite details revised at 4 of 31 sitesv20Show 1 more changeShow less
NotablePrimary endpoints revised (6)Enrollment target: 155 to 181 · Study sites: 22 to 24 · Eligibility criteria expanded, about 18 words · 1 morev15Show 4 more changesShow less
MinorStudy sites: 2 to 6Start date changed from estimate of Nov 24, 2025 to Jan 13, 2026v4Show 1 more changeShow less
Start date changed from estimate of Nov 24, 2025 to Jan 13, 2026
MinorEnrollment target: 203 to 155Study sites: 1 to 2v3Show 1 more changeShow less
Study sites: 1 to 2
NotableTrial status: Not Yet Recruiting to RecruitingStudy sites: 0 to 1 · Primary and study completion dates: May 14, 2032 to Jun 4, 2032 · Start date: Nov 3, 2025 to Nov 24, 2025v2Show 3 more changesShow less
Study sites: 0 to 1
Primary and study completion dates: May 14, 2032 to Jun 4, 2032
Start date: Nov 3, 2025 to Nov 24, 2025
MinorStudy First Submitted
Stopped: an ongoing trial was terminated, suspended or withdrawn.
Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
Minor: routine progress and housekeeping, such as sites added or enrollment closed.
The purpose of this study is to evaluate the safety, tolerability, and efficacy of two different treatment combinations of tulmimetostat in participants with de novo or recurrent metastatic hormone-sensitive prostate cancer (mHSPC). Phase I aims to determine the recommended dose(s) for expansion (RDE) of tulmimetostat in combination with darolutamide or abiraterone. Phase II is designed to further evaluate the efficacy and safety of tulmimetostat in combination with darolutamide compared with darolutamide alone in participants with mHSPC.