Last updated on December 2019

Study of Chemotherapy With Pembrolizumab (MK-3475) Followed by Maintenance With Olaparib (MK-7339) for the First-Line Treatment of Women With BRCA Non-mutated Advanced Epithelial Ovarian Cancer (EOC) (MK-7339-001/KEYLYNK-001/ENGOT-ov43)

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Brief description of study

The purpose of this study is to assess the efficacy and safety of treatment with carboplatin/paclitaxel PLUS pembrolizumab (MK-3475) and maintenance olaparib (MK-7339) in women with epithelial ovarian cancer (EOC), fallopian tube cancer, or primary peritoneal cancer.

The primary study hypotheses are that the combination of pembrolizumab plus carboplatin/paclitaxel followed by continued pembrolizumab and maintenance olaparib is superior to carboplatin/paclitaxel alone with respect to Progression Free Survival (PFS) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) and/or Overall Survival (OS), and that the combination of pembrolizumab plus carboplatin/paclitaxel followed by continued pembrolizumab is superior to carboplatin/paclitaxel alone with respect to PFS per RECIST 1.1 and/or OS.

Detailed Study Description

Following a lead-in period during which all participants receive a single 3-week cycle of carboplatin/paclitaxel, participants will be randomly assigned in to one of three treatment

arms

• Pembrolizumab+Olaparib,
• Pembrolizumab+Placebo for Olaparib, or
• Placebo for Pembrolizumab+Placebo for Olaparib.

At Investigator's discretion and prior to participant randomization, one of the following carboplatin/paclitaxel regimens is to be selected:

1. up to 5 cycles of carboplatin Area Under the Curve (AUC)5 or AUC6 AND paclitaxel 175 mg/m^2 on Day 1 of each 3-week cycle
2. up to 5 cycles of carboplatin AUC5 or AUC6 on Day 1 of each 3-week cycle AND paclitaxel 80 mg/m^2 on Days 1, 8 and 15 of each 3-week cycle; or
3. up to 5 cycles of carboplatin AUC2 or AUC2.7 AND paclitaxel 60 mg/m^2 on Days 1, 8 and 15 of each 3-week cycle.