CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 462 enrolled
Drug / intervention
Pembrolizumab +3 morebiological
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/NCT04191135
NCT04191135Phase 2Completed

An Open-label, Randomized, Phase 2/3 Study of Olaparib Plus Pembrolizumab Versus Chemotherapy Plus Pembrolizumab After Induction of Clinical Benefit With First-line Chemotherapy Plus Pembrolizumab in Participants With Locally Recurrent Inoperable or Metastatic Triple Negative Breast Cancer (TNBC) (KEYLYNK-009)

Merck Sharp & Dohme LLC·interventional·Posted Dec 9, 2019·Updated Mar 3, 2026

In Brief

A Phase 2 clinical trial evaluating Pembrolizumab, Olaparib, and 2 other interventions for Triple Negative Breast Neoplasms. Completed, enrolled 462 participants across 122 sites in 15 countries.

Detailed Summary

The purpose of this study is to compare the efficacy of olaparib (MK-7339) plus pembrolizumab (MK-3475) with chemotherapy plus pembrolizumab after induction with first-line chemotherapy plus pembrolizumab in triple negative breast cancer (TNBC). The primary hypotheses are: 1. Olaparib plus pembrolizumab is superior to chemotherapy plus pembrolizumab with respect to progression-free survival (PFS). 2. Olaparib plus pembrolizumab is superior to chemotherapy plus pembrolizumab with respect to overall survival (OS). As of Amendment 3, study enrollment was discontinued. Participants who were receiving benefit from the study intervention could continue treatment until criteria for discontinuation are met. Participants who are on study treatment or in follow-up phase will no longer have tumor response assessments by BICR.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
CountriesCanada, Chile, Colombia, France, Germany, Hungary, Ireland, Japan, Poland, South Korea, Spain, Taiwan, Ukraine, United Kingdom, United States
Collaborators--

Timeline

Phase 2CompletedFinished
2020202120222023202420252026
First PostedDec 9, 2019
Enrollment StartDec 19, 2019
Primary CompletionDec 15, 2022
Study CompletionNov 26, 2025
TodayJul 2, 2026
Enrollment to primary: 3.0 yearsPosted 6.6 years ago

Interventions

Pembrolizumabbiological

intravenous (IV) infusion

Olaparibdrug

oral tablets

Carboplatindrug

IV infusion

Gemcitabinedrug

IV infusion