A Phase 3, Randomized, Double-blind Trial of Pembrolizumab (MK-3475) Plus Enzalutamide Versus Placebo Plus Enzalutamide in Participants With Metastatic Castration-Resistant Prostate Cancer (mCRPC) (KEYNOTE-641)
A Phase 3, Randomized, Double-blind Trial of Pembrolizumab (MK-3475) Plus Enzalutamide Versus Placebo Plus Enzalutamide in Participants With Metastatic Castration-Resistant Prostate Cancer (mCRPC) (KEYNOTE-641)
The purpose of this study is to assess the efficacy and safety of the combination of pembrolizumab (MK-3475) and enzalutamide in the treatment of men with metastatic castration-resistant prostate cancer (mCRPC) who have not received chemotherapy for mCRPC, are abiraterone-naïve, or are intolerant to or progressed on abiraterone acetate. There are two primary study hypotheses.
Hypothesis 1: The combination of pembrolizumab plus enzalutamide is superior to placebo plus enzalutamide with respect to Overall Survival (OS).
Hypothesis 2: The combination of pembrolizumab plus enzalutamide is superior to placebo plus enzalutamide with respect to Radiographic Progression-free Survival (rPFS) per Prostate Cancer Working Group (PCWG)-modified Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as assessed by blinded independent central review.
The main inclusion and exclusion criteria include but are not limited to the following:
Inclusion Criteria:
Exclusion Criteria:
Mobile, Alabama 36604, United States
Grand Rapids, Michigan 49503, United States
Omaha, Nebraska 68130, United States
Hackensack, New Jersey 07601, United States
Milwaukee, Wisconsin 53226, United States
Berazategui, Buenos Aires B1884BBF, Argentina
CABA, Buenos Aires C1015ABO, Argentina
Ciudad Autonoma de Buenos Aires., Buenos Aires C1426ANZ, Argentina
Buenos Aires, C1012AAR, Argentina
Macquarie University, New South Wales 2109, Australia
Natal, Rio Grande do Norte 59075-740, Brazil
Ijuí, Rio Grande do Sul 98700-000, Brazil
Porto Alegre, Rio Grande do Sul 90610-000, Brazil
Itajaí, Santa Catarina 88301-215, Brazil
São José do Rio Preto, São Paulo 15090-000, Brazil
Sofia, Sofia (stolitsa) 1301, Bulgaria
Québec, Quebec G1J 1Z4, Canada
Rimouski, Quebec G5L 5T1, Canada
Sherbrooke, Quebec J1H 5N4, Canada
Bogotá, Bogota D.C. 110311, Colombia
Valledupar, Cesar Department 200001, Colombia
Brno, Brno-mesto 656 91, Czechia
Freiburg im Breisgau, Baden-Wurttemberg 79106, Germany
Nuremberg, Bavaria 90419, Germany
Kecskemét, Bács-Kiskun county 6000, Hungary
Győr, Győr-Moson-Sopron 9024, Hungary
Budapest, Pest County 1122, Hungary
Meldola, Emilia-Romagna 47014, Italy
Pozzuoli, Napoli 80078, Italy
Verona, Veneto 37134, Italy
Bydgoszcz, Kuyavian-Pomeranian Voivodeship 85-796, Poland
Koszalin, West Pomeranian Voivodeship 75-581, Poland
Chelyabinsk, Chelyabinsk Oblast 454087, Russia
Krasnoyarsk, Krasnoyarsk Krai 660133, Russia
Gatchina, Leningradskaya Oblast' 188300, Russia
Saint Petersburg, Sankt-Peterburg 197758, Russia
Saint Petersburg, Sankt-Peterburg 197758, Russia
Tomsk, Tomsk Oblast 634050, Russia
Songpagu, Seoul 05505, South Korea
Tainen, Tainan 704, Taiwan
Adana, 01250, Turkey (Türkiye)
Istanbul, 34440, Turkey (Türkiye)
Istanbul, 34722, Turkey (Türkiye)
Dnipro, Dnipropetrovsk Oblast 49005, Ukraine
Dnipropetrovsk, Dnipropetrovsk Oblast 49055, Ukraine
Ivano-Frankivsk, Ivano-Frankivsk Oblast 76008, Ukraine
Ivano-Frankivsk, Ivano-Frankivsk Oblast 76018, Ukraine
Kharkiv, Kharkiv Oblast 61070, Ukraine
Kiev, Kyivska Oblast 08720, Ukraine
Kyiv, Kyivska Oblast 03115, Ukraine
Bristol, Bristol, City of BS2 8ED, United Kingdom
Cambridge, Cambridgeshire CB2 0QQ, United Kingdom
London, London, City of NW1 2PG, United Kingdom