CI

At a glance

ClinicalIndex Comparison Record
Phase 2Active· 49 enrolled
Drug / intervention
RP-3500 +1 moredrug
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05566574
NCT05566574Phase 2Active

RP-3500 (ATRi) + External Beam Radiotherapy (EBRT) for the Palliative Treatment of Metastatic Disease

Memorial Sloan Kettering Cancer Center·interventional·Posted Oct 4, 2022·Updated Dec 17, 2025

In Brief

A Phase 2 clinical trial evaluating RP-3500 and External Beam Radiotherapy (EBRT) for Solid Tumor and Metastatic Cancer. Active but no longer recruiting, targeting 49 participants across 7 sites.

Detailed Summary

The purpose of this study is to test the safety of the study drug, RP-3500 when given in combination with palliative external beam radiotherapy (EBRT) to people who have metastatic solid tumor cancer with a mutation of the ATM gene. The study researchers will do tests to find the highest dose of RP3500 that causes few or mild side effects.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesUnited States
CollaboratorsRepare Therapeutics

Timeline

Phase 2Active
2023202420252026
First PostedOct 4, 2022
Enrollment StartSep 30, 2022
Primary CompletionSep 30, 2026
TodayJul 1, 2026
Enrollment to primary: 4 yearsPosted 3.7 years agoPrimary completion in 3 months

Interventions

RP-3500drug

RP-3500 on Days 1-5.

External Beam Radiotherapy (EBRT)radiation

Palliative radiation therapy (4Gy x 5 fractions) to a metastatic site on Days 1-5