Efficacy and Safety of Pembrolizumab (MK-3475) Plus Enzalutamide Plus Androgen Deprivation Therapy (ADT) Versus Placebo Plus Enzalutamide Plus ADT in Participants With Metastatic Hormone-Sensitive Prostate Cancer (mHSPC) (MK-3475-991/KEYNOTE-991)

PHASE3Active, not recruitingINTERVENTIONAL
Enrollment

1,251

Participants

Timeline

Start Date

February 12, 2020

Primary Completion Date

October 31, 2022

Study Completion Date

February 2, 2026

Conditions
Metastatic Hormone-Sensitive Prostate Cancer
Interventions
BIOLOGICAL

Pembrolizumab

Pembrolizumab is administered as an IV infusion at 200 mg on Day 1 of each 21-day cycle for up to 35 cycles.

DRUG

Enzalutamide

Enzalutamide is administered orally as capsules/tablets at a dosage of 160 mg daily. Enzalutamide is administered continuously until criteria for discontinuation are met.

DRUG

Androgen Deprivation Therapy (ADT)

Stable regimen of ADT (LHRH agonist or antagonist) at a dose and frequency of administration that is consistent with the local product label.

OTHER

Placebo

Placebo infusion solution is administered as an IV infusion on Day 1 of each 21-day cycle for up to 35 cycles.

Trial Locations (234)

100

National Taiwan University Hospital ( Site 0500), Taipei

1011

CHUV (centre hospitalier universitaire vaudois) ( Site 2002), Lausanne

1020

Krankenhaus der Barmherzigen Brüder Wien ( Site 0904), Vienna

1023

Auckland City Hospital ( Site 0321), Auckland

1090

Medizinische Universität Wien ( Site 0903), Vienna

2050

Chris OBrien Lifehouse ( Site 0300), Camperdown

2100

Rigshospitalet ( Site 1005), Copenhagen

2444

Port Macquarie Base Hospital ( Site 0301), Port Macquarie

2650

Riverina Cancer Care Center ( Site 0302), Wagga Wagga

2730

Herlev og Gentofte Hospital. ( Site 1004), Herlev

3000

Peter MacCallum Cancer Centre-Parkville Cancer Clinical Trials Unit (PCCTU) ( Site 0306), Melbourne

3128

Box Hill Hospital ( Site 0304), Box Hill

3168

Monash Health ( Site 0305), Clayton

4020

Ordensklinikum Linz GmbH Elisabethinen ( Site 0901), Linz

4120

Gallipoli Medical Research Ltd ( Site 0309), Greenslopes

4224

John Flynn Hospital & Medical Centre ( Site 0308), Tugun

5000

Odense Universitetshospital ( Site 1003), Odense

5020

Landeskrankenhaus Salzburg - Universitatklinikum der PMU ( Site 0900), Salzburg

6150

Fiona Stanley Hospital ( Site 0311), Perth

7000

Kantonsspital Graubuenden ( Site 2003), Chur

7100

Vejle Sygehus ( Site 1002), Vejle

8091

Universitaetsspital Zuerich ( Site 2001), Zurich

9000

Aalborg Universitetshospital ( Site 1000), Aalborg

9007

Kantonsspital St. Gallen ( Site 2000), Sankt Gallen

10016

Laura and Isaac Perlmutter Cancer Center at NYU Langone Health ( Site 0270), New York

10065

Weill Cornell Medical College ( Site 0263), New York

10117

Charite Universitaetsmedizin Berlin ( Site 1201), Berlin

10330

Chulalongkorn Hospital, Medical Oncology Unit ( Site 0600), Bangkok

10400

Ramathibodi Hospital. ( Site 0601), Bangkok

10408

National Cancer Center ( Site 0400), Gyeonggi-do

10700

Faculty of Medicine Siriraj Hospital ( Site 0602), Bangkok

11217

Taipei Veterans General Hospital ( Site 0501), Taipei

13011

Clinica Peruano Americana S.A. ( Site 2702), Trujillo

13210

Associated Medical Professionals of NY ( Site 0251), Syracuse

13620

Seoul National University Bundang Hospital ( Site 0401), Seongnam-si

15033

Hospital Nacional Guillermo Almenara Irigoyen ( Site 2708), Lima

15036

IPOR Instituto Peruano de Oncología & Radioterapia-Centro de Investigación ( Site 2706), Lima

15076

Hospital Militar Central [Lima, Peru] ( Site 2704), Lima

17007

Institut Català d'Oncologia (ICO) - Girona ( Site 1900), Girona

19004

MidLantic Urology ( Site 0273), Bala-Cynwyd

20016

Sibley Memorial Hospital ( Site 0275), Washington D.C.

20089

Istituto Clinico Humanitas Research Hospital ( Site 1500), Rozzano

20133

Istituto Nazionale dei Tumori ( Site 1510), Milan

20246

Universitaetsklinikum Hamburg-Eppendorf ( Site 1212), Hamburg

20520

TYKS T-sairaala Syopatautien pkl ( Site 1019), Turku

21079

Centre Georges Francois Leclerc ( Site 1112), Dijon

21287

The Sidney Kimmel Comprehensive Cancer Center ( Site 0204), Baltimore

22031

Inova Health System ( Site 0205), Fairfax

23462

Urology of Virginia ( Site 0224), Virginia Beach

25000

CHU-Jean Minjoz ( Site 1101), Besançon

27003

Hospital Universitario Lucus Augusti ( Site 1905), Lugo

27710

Duke University ( Site 0206), Durham

28034

Hospital Universitario Ramon y Cajal ( Site 1902), Madrid

28040

Hospital Clinico San Carlos ( Site 1906), Madrid

28041

Hospital 12 de Octubre de Madrid ( Site 1903), Madrid

29090

Hospital San Lucas Cardiologica del Sureste ( Site 2606), Tuxtla Gutiérrez

29200

CHU de Brest -Site Hopital Morvan ( Site 1103), Brest

29401

Ralph H. Johnson VA Center ( Site 0256), Charleston

29572

Carolina Urologic Research Center ( Site 0259), Myrtle Beach

31000

Centro Estatal de Cancerologia de Chihuahua ( Site 2608), Chihuahua City

33076

Institut Bergonie ( Site 1104), Bordeaux

33081

Centro Di Riferimento Oncologico ( Site 1511), Aviano

33305

Chang Gung Medical Foundation. Linkou ( Site 0502), Taoyuan District

33520

Tampereen yliopistollinen sairaala ( Site 1022), Tampere

34098

Istanbul Uni. Cerrahpasa Tip Fakultesi ( Site 2100), Istanbul

35033

C.H.R.U. de Rennes. Hopital de Pontchaillou ( Site 1117), Rennes

35100

Ege University Medical Faculty Tulay Aktas Oncology Hospital ( Site 2102), Izmir

37126

A.O. Verona-Ospedale Civile Maggiore Borgo-Trento ( Site 1504), Verona

37209

Urology Associates [Nashville, TN] ( Site 0233), Nashville

38126

Staedtisches Klinikum Braunschweig gGmbH ( Site 1217), Braunschweig

39120

Universitaetsklinikum Magdeburg A.o.R. ( Site 1211), Magdeburg

40002

Srinagarind Hospital ( Site 0604), Khon Kaen

40620

Keski-Suomen keskussairaala ( Site 1017), Jyväskylä

41009

Hospital Virgen de la Macarena ( Site 1904), Seville

41404

Kyungpook National University Chilgok Hospital ( Site 0404), Daegu

42080

Konya Necmettin Erbakan University Medical Faculty ( Site 2104), Konya

44280

Hospital Civil de Guadalajara Fray Antonio Alcalde ( Site 2607), Guadalajara

45212

TriState Urologic Services PSC Inc. dba The Urology Group ( Site 0253), Cincinnati

47014

Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori ( Site 1503), Meldola

51100

Institut Jean Godinot-Clinical Research Unit ( Site 1118), Reims

54000

Centre D Oncologie de Gentilly ( Site 1107), Nancy

58128

Chonnam National University Hwasun Hospital ( Site 0406), Jeollanam-do

59000

Centre Bourgogne ( Site 1119), Lille

59102

St. Vincent Frontier Cancer Center-Research ( Site 0213), Billings

60637

The University of Chicago ( Site 0264), Chicago

62702

Springfield Clinic [Springfield, IL] ( Site 0240), Springfield

66606

Cotton-O'Neil Cancer Center ( Site 0228), Topeka

67200

Institut de cancérologie Strasbourg Europe (ICANS) ( Site 1114), Strasbourg

69310

Hospices Civils de Lyon Centre Hospitalier Lyon Sud ( Site 1102), Pierre-Bénite

69373

Centre Leon-Berard ( Site 1110), Lyon

70124

IRCCS Giovanni Paolo II. Ospedale Oncologico ( Site 1509), Bari

70300

Yitzhak Shamir Medical Center. ( Site 1405), Ẕerifin

70457

National Cheng Kung University Hospital ( Site 0503), Tainan City

76070

Boca Raton Clinical Research QTO ( Site 2611), Querétaro

79106

Universitaetsklinikum Freiburg ( Site 1200), Freiburg im Breisgau

80045

University of Colorado, Anschutz Cancer Pavilion ( Site 0236), Aurora

80131

Istituto Nazionale Tumori IRCCS Fondazione Pascale ( Site 1508), Napoli

81377

Klinikum der Universitaet Muenchen - Grosshadern ( Site 1210), Munich

81675

Klinikum Rechts der Isar ( Site 1206), München

83301

Kaohsiung Chang Gung Memorial Hospital ( Site 0504), Kaohsiung City

89169

Comprehensive Cancer Centers of Nevada ( Site 0269), Las Vegas

90404

UCLA Hematology/Oncology - Santa Monica ( Site 0241), Los Angeles

90419

Klinikum Nuernberg Nord ( Site 1213), Nuremberg

91010

City of Hope Medical Center ( Site 0217), Duarte

92151

Hopital Foch ( Site 1105), Suresnes

94010

Hopital Henri Mondor ( Site 1116), Créteil

95126

Azienda Ospedaliera Cannizzaro ( Site 1501), Catania

98109

Fred Hutchinson Cancer Center ( Site 0258), Seattle

99503

Alaska Clinical Research Center ( Site 0274), Anchorage

99508

Providence Alaska Medical Center ( Site 0276), Anchorage

100034

Peking University First Hospital ( Site 0800), Beijing

100142

Beijing Cancer Hospital ( Site 0802), Beijing

105077

SBIH City clinical hospital named after D.D. Pletniov ( Site 1813), Moscow

110221

Administradora Country SA - Clinica del Country ( Site 2507), Bogotá

111511

Instituto Nacional de Cancerologia E.S.E ( Site 2506), Bogotá

117997

Russian Scientific Center of Roentgenoradiology ( Site 1800), Moscow

150081

Harbin Medical University Cancer Hospital ( Site 0822), Harbin

200001

Sociedad de Oncología Y Hematología del Cesar S.A.S. ( Site 2509), Valledupar

200127

Renji Hospital Shanghai Jiaotong University School of Medicine ( Site 0807), Shanghai

210008

Nanjing Drum Tower Hospital ( Site 0811), Nanjing

300000

Tianjin Medical University Cancer Institute & Hospital ( Site 0804), Tianjin

310009

2nd Affil Hosp of Zhejiang University College of Medicine ( Site 0808), Hangzhou

The 1st Affil Hosp of College of Medicine, Zhejiang Univ ( Site 0830), Hangzhou

310014

Zhejiang Provincial People's Hospital ( Site 0809), Hangzhou

315010

Ningbo First Hospital-Urology ( Site 0835), Ningbo

325000

The First Affiliated Hospital of Wenzhou Medical University ( Site 0834), Wenzhou

330006

The First Affiliated Hospital of Nanchang University ( Site 0821), Nanchang

361003

The First Affiliated Hospital of Xiamen University ( Site 0816), Xiamen

400030

Chongqing Cancer Hospital ( Site 0815), Chongqing

410013

Hunan Cancer Hospital ( Site 0817), Changsha

430000

Union Hospital Tongji Medical College Huazhong University of Science and Technology ( Site 0829), Wuhan

430079

Hubei Cancer Hospital ( Site 0833), Wuhan

450008

Henan Cancer Hospital ( Site 0818), Zhengzhou

510060

Sun Yat-Sen University Cancer Center ( Site 0825), Guangzhou

510080

The First Affiliated Hospital of Guangzhou Medical University-Urology ( Site 0837), Guangdong

510220

Sun Yat Sen Memorial Hospital ( Site 0819), Guangzhou

510515

Southern Medical University Nanfang Hospital ( Site 0838), Guangzhou

603074

Volga District Medical Center Federal Medical and Biological Agency ( Site 1805), Nizhny Novgorod

644013

Omsk Clinical Oncology Dispensary ( Site 1809), Omsk

660133

Krasnoyarsk Regional Clinical Oncological Dispensary ( Site 1810), Krasnoyarsk

710004

The Second Affiliated Hosp of Xi'an Jiaotong Univ College of Medicine ( Site 0831), Xi'an

710061

The first affiliated Hospital of Xi an Jiaotong University ( Site 0812), Xi’an

760042

Hemato Oncologos ( Site 2503), Santiago de Cali

1720430

IC La Serena Research ( Site 2406), La Serena

2520598

Oncocentro ( Site 2400), Viña del Mar

3109601

Rambam Health Care Campus-Oncology Division ( Site 1400), Haifa

3465584

Clinica Universidad Catolica del Maule ( Site 2407), Talca

4428164

Meir Medical Center ( Site 1401), Kfar Saba

4800827

Centro Investigación del Cáncer James Lind ( Site 2401), Temuco

4941492

Rabin Medical Center ( Site 1402), Petah Tikva

6423906

Sourasky Medical Center ( Site 1403), Tel Aviv

7650568

Clinica Alemana ( Site 2408), Santiago

8330024

Pontificia Universidad Catolica de Chile ( Site 2402), Santiago

8420383

Bradfordhill ( Site 2403), Santiago

9112001

Hadassah Ein Kerem Medical Center ( Site 1404), Jerusalem

06042

Hartford HealthCare Medical Group ( Site 0212), Manchester

06510

Smilow Cancer Center at Yale-New Haven ( Site 0250), New Haven

30322-1013

Winship Cancer Institute of Emory University ( Site 0209), Atlanta

60135-237

Oncocentro Ceara ( Site 2309), Fortaleza

80510-130

Instituto de Cancer e Transplante de Curitiba ICTR ( Site 2306), Curitiba

99010-080

Hospital Sao Vicente de Paulo ( Site 2303), Passo Fundo

90035-903

Hospital de Clinicas de Porto Alegre ( Site 2304), Porto Alegre

89010-340

Clinica de Oncologia Reichow ( Site 2308), Blumenau

17210-120

Fundacao Dr Amaral Carvalho ( Site 2302), Jaú

12460-000

Instituto do Cancer do Estado de Sao Paulo - ICESP ( Site 2305), São Paulo

K1H 8L6

The Ottawa Hospital ( Site 0100), Ottawa

L2S 0A9

Niagara Health System - St. Catharines ( Site 0107), St. Catharines

J4V 2H1

CISSS de la Monteregie-Centre ( Site 0105), Greenfield Park

H2X 3E4

Centre Hospitalier de l Universite de Montreal - CHUM ( Site 0109), Montreal

H3T 1M5

CIUSSS Ouest de l Ile - St-Mary s Hospital ( Site 0106), Montreal

G1J 1Z4

Centre intégré de cancérologie du CHU de Québec Université Laval, Hôpital de l'Enfant-Jésus ( Site 0101), Québec

080020

Clinica de la Costa S.A.S. ( Site 2504), Barranquilla

00290

HYKS ( Site 1020), Helsinki

01307

Universitaetsklinikum der Technischen Universitaet Dresden ( Site 1204), Dresden

D04 T6F4

St Vincents University Hospital ( Site 1300), Dublin

T12 DC4A

Cork University Hospital ( Site 1304), Cork

D24 NR0A

Tallaght University Hospital ( Site 1301), Dublin

Dublin 9

Beaumont Hospital ( Site 1302), Dublin

V94 F858

University Hospital Limerick ( Site 1305), Limerick

X91 ER8E

University Hospital Waterford ( Site 1303), Waterford

00168

Fondazione Policlinico Universitario A. Gemelli ( Site 1512), Rome

05100

Azienda Ospedaliera Santa Maria ( Site 1502), Terni

285-8741

Toho University Sakura Medical Center ( Site 0732), Sakura

791-0295

Ehime University Hospital ( Site 0745), Tōon

060-8543

Sapporo Medical University Hospital ( Site 0730), Sapporo

252-0375

Kitasato University Hospital ( Site 0734), Sagamihara

232-0024

Yokohama City University Medical Center ( Site 0735), Yokohama

634-8522

Nara Medical University Hospital ( Site 0744), Kashihara

589-8511

Kindai University Hospital ( Site 0743), Sayama

565-0871

The University of Osaka Hospital ( Site 0742), Suita

350-1298

Saitama Medical University International Medical Center ( Site 0737), Hidaka

343-8555

Dokkyo Medical University Saitama Medical Center ( Site 0736), Koshigaya

431-3192

Hamamatsu University Hospital ( Site 0748), Hamamatsu

755-8505

Yamaguchi University Hospital ( Site 0746), Ube

260-8717

Chiba Cancer Center ( Site 0733), Chiba

812-0033

Harasanshin Hospital ( Site 0747), Fukuoka

381-8551

Nagano Municipal Hospital ( Site 0731), Nagano

545-8586

Osaka Metropolitan University Hospital ( Site 0741), Osaka

105-8470

Toranomon Hospital ( Site 0740), Tokyo

113-8603

Nippon Medical School Hospital ( Site 0738), Tokyo

162-8666

Tokyo Women's Medical University ( Site 0739), Tokyo

03310

Grupo Medico Camino SC ( Site 2613), Mexico City

04700

Centro Oncologico Internacional. SEDNA ( Site 2609), Mexico City

6500 HB

Radboud University Medical Center ( Site 1606), Nijmegen

1066 CX

Antoni van Leeuwenhoek Ziekenhuis ( Site 1603), Amsterdam

1081 HV

Vrije Universiteit Medisch Centrum ( Site 1601), Amsterdam

8025 AB

Isala Klinieken, Locatie Sophia ( Site 1604), Zwolle

3118 JH

Franciscus Gasthuis en Vlietland ( Site 1605), Schiedam

3813TZ

Meander Medisch Centrum ( Site 1602), Amersfoort

3543 AZ

St. Antonius Ziekenhuis ( Site 1600), Utrecht

04001

Hospital Nacional Carlos Alberto Seguin Escobedo ESSALUD ( Site 2700), Arequipa

61-848

Uniwersytecki Szpital Kliniczny w Poznaniu ( Site 1710), Poznan

85-094

Szpital Uniwersytecki nr 1 im. Dr. Antoniego Jurasza w Bydgoszczy ( Site 1720), Bydgoszcz

85-796

Centrum Onkologii im. Prof. Franciszka Lukaszczyka ( Site 1716), Bydgoszcz

87-100

MICS Centrum Medyczne Torun ( Site 1718), Torun

30-688

Szpital Uniwersytecki w Krakowie ( Site 1707), Krakow

26-600

Radomskie Centrum Onkologii ( Site 1701), Radom

37-700

Wojewodzki Szpital im. Sw. Ojca Pio w Przemyslu ( Site 1700), Przemyśl

41-900

Wojewodzki Szpital Specjalistyczny nr 4 w Bytomiu ( Site 1717), Bytom

75-581

Szpital Wojewodzki im. Mikolaja Kopernika ( Site 1709), Koszalin

71-434

Twoja Przychodnia - Szczeciskie Centrum Medyczne ( Site 1721), Szczecin

03080

Seoul National University Hospital ( Site 0405), Seoul

03722

Severance Hospital Yonsei University Health System ( Site 0402), Seoul

05505

Asan Medical Center ( Site 0403), Seoul

08908

Instituto Catalan de Oncologia - ICO ( Site 1901), L'Hospitalet de Llobregat

06800

Ankara Bilkent Sehir Hastanesi ( Site 2103), Ankara

01130

Acibadem Adana Hastanesi ( Site 2106), Adana

06100

Ankara Universitesi Tip Fakultesi. ( Site 2101), Ankara

06230

Hacettepe Universitesi Tıp Fakultesi ( Site 2105), Ankara

AB25 2ZN

Aberdeen Royal Infirmary ( Site 1315), Aberdeen

TR1 3LJ

Royal Cornwall Hospitals NHS Trust ( Site 1317), Truro

NW1 2BU

University College London Hospitals NHS Foundation Trust ( Site 1320), London

SW3 6JJ

ROYAL MARSDEN HOSPITAL (CHELSEA) ( Site 1318), London

CF14 2TL

Velindre Cancer Centre Hospital ( Site 1322), Cardiff

All Listed Sponsors
lead

Merck Sharp & Dohme LLC

INDUSTRY

NCT04191096 - Efficacy and Safety of Pembrolizumab (MK-3475) Plus Enzalutamide Plus Androgen Deprivation Therapy (ADT) Versus Placebo Plus Enzalutamide Plus ADT in Participants With Metastatic Hormone-Sensitive Prostate Cancer (mHSPC) (MK-3475-991/KEYNOTE-991) | Biotech Hunter | Biotech Hunter