Pembrolizumab/Placebo Plus Trastuzumab Plus Chemotherapy in Human Epidermal Growth Factor Receptor 2 Positive (HER2+) Advanced Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma (MK-3475-811/KEYNOTE-811)
Gastric Neoplasms, Gastroesophageal Junction Adenocarcinoma
About this trial
This is an interventional treatment trial for Gastric Neoplasms focused on measuring programmed cell death receptor 1 (PD-1), programmed cell death ligand 1 (PD-L1), anti-PD-1, anti PD-1, GEJ, Gastric Cancer
Eligibility Criteria
Inclusion Criteria:
- Histologically or cytologically confirmed diagnosis of previously untreated, locally advanced unresectable or metastatic HER2 positive gastric or GEJ adenocarcinoma
- HER2-positive defined as either immunohistochemistry (IHC) 3+ or IHC 2+ in combination with in-situ hybridization positive (ISH+) or fluorescent in-situ hybridization (FISH), as assessed by central review on primary or metastatic tumor
- Has measurable disease as defined by RECIST 1.1 as determined by the site investigator
- Male participants must agree to use approved contraception
- Female participants who are not pregnant or breastfeeding, and who are either not a woman of childbearing potential (WOCBP), or are a WOCBP who agrees to use approved contraception
- Has a performance status of 0 or 1 on the Eastern Cooperative Oncology Group (ECOG) Performance Scale within 3 days prior to the first dose of trial treatment
- Has a life expectancy of greater than 6 months
- Has adequate organ function
Exclusion Criteria:
- Has had previous therapy for locally advanced unresectable or metastatic gastric/GEJ cancer
- Has had major surgery, open biopsy or significant traumatic injury within 28 days prior to randomization, or anticipation of the need for major surgery during the course of study treatment
- Has had radiotherapy within 14 days of randomization
- Has a known additional malignancy that is progressing or has required active treatment within the past 5 years
- Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis
- Has an active autoimmune disease that has required systemic treatment in past 2 years
- Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy
- Has a history of (non-infectious) pneumonitis that required steroids or current pneumonitis
- Has a known history of active tuberculosis (TB; Mycobacterium tuberculosis)
- Has an active infection requiring systemic therapy
- Has poorly controlled diarrhea
- Accumulation of pleural, ascitic, or pericardial fluid requiring drainage or diuretic drugs within 2 weeks prior to enrollment. If the participant is receiving diuretic drugs for other reasons, it is acceptable
- Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the participant's participation for the full duration of the trial, or is not in the best interest of the participant to participate, in the opinion of the treating investigator
- Has peripheral neuropathy > Grade 1
- Has a known psychiatric or substance abuse disorder that would interfere with cooperation with the requirements of the trial
- A WOCBP who has a positive urine pregnancy test within 24 hours prior to randomization or treatment allocation
- Has active or clinically significant cardiac disease
- Has a known history of Human Immunodeficiency Virus (HIV) (HIV 1/2 antibodies)
- Has a known history of Hepatitis B (defined as Hepatitis B surface antigen [HBsAg] reactive) or known active Hepatitis C virus (defined as HCV RNA [qualitative] is detected) infection
- Has severe hypersensitivity (≥Grade 3) to pembrolizumab, trastuzumab, study chemotherapy agents and/or to any excipients, murine proteins, or platinum-containing products
- Has had an allogeneic tissue/solid organ transplant
- Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti PD L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (e.g., cytotoxic T-lymphocyte-associated protein 4 [CTLA-4], OX 40, Cluster of Differentiation 137 [CD137])
Sites / Locations
- UCLA Hematology/Oncology - Westwood (Building 200 Suite 120) ( Site 0045)
- Pacific Cancer Care ( Site 0063)
- UC Irvine Medical Center/Chao Family Comprehensive Cancer Center ( Site 0050)
- University of Miami Sylvester Comprehensive Cancer Center - Plantation ( Site 0026)
- Southeastern Regional Medical Center, Inc. ( Site 0058)
- Midwestern Regional Medical Center, Inc. ( Site 0059)
- Beth Israel Deaconess Medical Center ( Site 0070)
- Dana-Farber Cancer Institute [Boston, MA] ( Site 0010)
- Minnesota Oncology Hematology, PA ( Site 8001)
- Washington University School of Medicine ( Site 0040)
- Memorial Sloan Kettering Cancer Center- Monmouth ( Site 0071)
- Memorial Sloan-Kettering Cancer Center at West Harrison ( Site 0065)
- Memorial Sloan-Kettering Cancer Center ( Site 0017)
- University of Rochester ( Site 0041)
- Levine Cancer Institute ( Site 0015)
- Duke Cancer Institute ( Site 0042)
- CTCA Southwestern ( Site 0060)
- Cancer Treatment Centers of America-Eastern Regional Medical Center ( Site 0025)
- Allegheny General Hospital ( Site 0053)
- Sanford Hematology Oncology-Sioux Falls SD ( Site 0004)
- University of Texas MD Anderson Cancer Center ( Site 0001)
- Oncology & Hematology Assoc. SW Virginia, Inc., DBA Blue Ridge Cancer Care ( Site 8000)
- Seattle Cancer Care Alliance ( Site 0038)
- Liverpool Hospital ( Site 2206)
- Westmead Hospital ( Site 2200)
- Southern Medical Day Care Centre ( Site 2207)
- Monash Health ( Site 2202)
- Hospital Sao Rafael ( Site 0209)
- Instituto do Cancer do Ceara ( Site 0208)
- CIONC - Centro Integrado de Oncologia de Curitiba ( Site 0205)
- Hospital de Caridade de Ijui ( Site 0202)
- Hospital Nossa Senhora da Conceicao ( Site 0203)
- CEPON - Centro de Pesquisas Oncologicas ( Site 0200)
- Instituto Nacional do Cancer Jose Alencar Gomes da Silva INCA ( Site 0201)
- IBCC - Instituto Brasileiro de Controle do Cancer ( Site 0204)
- Centro Investigación del Cáncer James Lind ( Site 0300)
- Clinica Universidad Catolica del Maule ( Site 0305)
- Fundacion Arturo Lopez Perez FALP ( Site 0302)
- Pontificia Universidad Catolica de Chile ( Site 0301)
- Instituto Nacional del Cancer ( Site 0303)
- Shanghai General Hospital ( Site 2404)
- Peking Union Medical College Hospital ( Site 2419)
- Fifth Medical Center of CPLA General Hospital ( Site 2415)
- Beijing Cancer Hospital ( Site 2413)
- Fujian Provincial Cancer Hospital ( Site 2418)
- 900 Hospital of the Joint ( Site 2420)
- The First Affiliated Hospital of Xiamen University ( Site 2431)
- Guangdong General Hospital ( Site 2433)
- Harbin Medical University Cancer Hospital ( Site 2407)
- Henan Cancer Hospital ( Site 2400)
- Xiangya Hospital Central-South University ( Site 2426)
- Jiangsu Cancer Hospital ( Site 2432)
- The First Hospital Of Jilin University ( Site 2402)
- Fudan University Shanghai Cancer Center ( Site 2424)
- Zhongshan Hospital affiliated to Fudan University ( Site 2401)
- Cancer Hospital Affiliated to Xinjiang Medical University ( Site 2430)
- The First Affiliated Hospital.Zhejiang University ( Site 2408)
- Sir Run Run Shaw Hospital ( Site 2412)
- Zhejiang Cancer Hospital ( Site 2409)
- CHU de Rouen ( Site 0912)
- HUS Hopital Hautepierre ( Site 0910)
- Hopital Jean Minjoz Besancon ( Site 0901)
- C.H.R.U. de Brest - Hopital Morvan ( Site 0913)
- Centre Oscar Lambret ( Site 0911)
- Centre Leon Berard ( Site 0904)
- Institut de Cancerologie de l Ouest Centre Rene Gauducheau ( Site 0902)
- Institut Gustave Roussy ( Site 0900)
- CHU Hopital Saint Antoine ( Site 0905)
- SLK-Kliniken Heilbronn ( Site 1015)
- Klinikum Ludwigsburg ( Site 1014)
- Innere Medizin I, Universitaetsklinikum Tuebingen ( Site 1020)
- Klinikum rechts der Isar der Technischen Universitaet ( Site 1027)
- Medizinische Hochschule Hannover ( Site 1019)
- Universitaetsklinikum Carl Gustav Carus der Technischen Univ ( Site 1001)
- Universitaetsklinikum Leipzig AOeR ( Site 1007)
- Charite-Universitaetsmedizin Berlin Campus Virchow-Klinikum ( Site 1026)
- Klinikum Bremen Nord ( Site 1017)
- Facharztzentrum Eppendorf ( Site 1025)
- Asklepios Klinik Altona ( Site 1000)
- Celan SA ( Site 0504)
- Oncomedica ( Site 0500)
- Grupo Angeles SA ( Site 0501)
- Nucare Center ( Site 0506)
- Medi-K Cayala ( Site 0505)
- Centro Regional de Sub Especialidades Medicas SA ( Site 0502)
- Saint James's Hospital ( Site 1505)
- Beaumont Hospital ( Site 1506)
- Tallaght University Hospital ( Site 1513)
- Soroka University Medical Center ( Site 1603)
- Rambam Health Care Campus ( Site 1606)
- Edith Wolfson Medical Center ( Site 1605)
- Hadassah Ein Kerem Medical Center ( Site 1604)
- Meir Medical Center ( Site 1609)
- Rabin Medical Center ( Site 1602)
- Chaim Sheba Medical Center. ( Site 1607)
- Sourasky Medical Center ( Site 1601)
- AUOP Ospedale Santa Chiara ( Site 1100)
- Humanitas Gavazzeni ( Site 1106)
- Universita Magna Graecia di Catanzaro ( Site 1107)
- IEO Istituto Europeo di Oncologia ( Site 1105)
- Azienda Ospedaliero - Universitaria Policlinico di Modena ( Site 1102)
- A.O.U. Universita degli Studi della Campania-Luigi Vanvitelli ( Site 1103)
- Istituto Oncologico Veneto ( Site 1101)
- Ospedale Civile Spirito Santo ( Site 1104)
- Aichi Cancer Center Hospital ( Site 2617)
- National Cancer Center Hospital East ( Site 2605)
- National Hospital Organization Shikoku Cancer Center ( Site 2615)
- Gunma Prefectural Cancer Center ( Site 2602)
- Hyogo Cancer Center ( Site 2619)
- Kobe City Medical Center General Hospital ( Site 2614)
- Ibaraki Prefectural Central Hospital ( Site 2611)
- Kagawa University Hospital ( Site 2604)
- Kanagawa Cancer Center ( Site 2603)
- Osaki Citizen Hospital ( Site 2626)
- Kansai Medical University Hospital ( Site 2618)
- Kindai University Hospital ( Site 2616)
- Osaka University Hospital ( Site 2600)
- Saitama Cancer Center ( Site 2620)
- Shizuoka Cancer Center Hospital and Research Institute ( Site 2607)
- Tochigi Cancer Center ( Site 2627)
- Kyorin University Hospital ( Site 2608)
- Chiba Cancer Center ( Site 2623)
- National Hospital Organization Kyushu Cancer Center ( Site 2609)
- Gifu University Hospital ( Site 2621)
- Hiroshima City Hiroshima Citizens Hospital ( Site 2625)
- Kumamoto University Hospital ( Site 2601)
- Niigata Cancer Center Hospital ( Site 2622)
- National Hospital Organization - Osaka National Hospital - Institute For Clinical Research ( Site 26
- Osaka International Cancer Institute ( Site 2613)
- Osaka General Medical Center ( Site 2624)
- National Cancer Center Hospital ( Site 2612)
- Toranomon Hospital ( Site 2628)
- Tokyo Metropolitan Komagome Hospital ( Site 2606)
- The Cancer Institute Hospital of JFCR ( Site 2610)
- Seoul National University Hospital ( Site 2703)
- Severance Hospital Yonsei University Health System ( Site 2700)
- Asan Medical Center ( Site 2702)
- Samsung Medical Center ( Site 2701)
- Auckland City Hospital ( Site 2300)
- Uniwersytecki Szpital Kliniczny im. J. M. Radeckiego we Wroclawiu ( Site 1705)
- Dolnoslaskie Centrum Onkologii. ( Site 1712)
- Samodzielny Publiczny Szpital Kliniczny Nr 1 w Lublinie ( Site 1709)
- Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie - Panstwowy Instytut Badawczy w Warszawie (
- Szpital Morski im. PCK. Szpitale Pomorskie Sp. Z o.o ( Site 1715)
- Szpital Specjalistyczny w Koscierzynie Sp. z o.o. ( Site 1708)
- Beskidzkie Centrum Onkologii im. Jana Pawla II ( Site 1710)
- Przychodnia Lekarska Komed ( Site 1716)
- Republican Clinical Oncology Dispensary of Republic of Bashkortostan ( Site 1807)
- Chelyabinsk Regional Clinical Oncological Dispensary ( Site 1815)
- Podolsky City Clinical Hospital ( Site 1817)
- Blokhin National Medical Oncology ( Site 1805)
- Medical University REAVIZ ( Site 1816)
- Scientific Research Oncology Institute n.a. N.N.Petrov ( Site 1801)
- St Petersburg City Clinical Oncology Dispensary ( Site 1812)
- Leningrad Regional Oncology Center ( Site 1800)
- Hospital General Universitario de Elche ( Site 1404)
- Hospital Universitario Central de Asturias ( Site 1402)
- Hospital Germans Trias i Pujol. ICO de Badalona ( Site 1410)
- Hospital Universitario Marques de Valdecilla ( Site 1405)
- Hospital Universitario Quiron Madrid ( Site 1407)
- Hospital General Universitari Vall d Hebron ( Site 1401)
- Hospital Universitario Ramon y Cajal ( Site 1400)
- Adana Sehir Hastanesi ( Site 2002)
- Hacettepe Universitesi Tip Fakultesi Hastanesi ( Site 2017)
- Abdurrahman Yurtaslan Onkoloji Egitim ve Arastirma Hastanesi ( Site 2006)
- Trakya Universitesi Tip Fakultesi ( Site 2015)
- Ataturk Universitesi Tip Fakultesi Hastanesi ( Site 2000)
- Istanbul Universitesi Cerrahpasa Tip Fakultesi ( Site 2001)
- Dokuz Eylul Universitesi Tip Fakultesi Hastanesi ( Site 2011)
- Malatya Inonu Universitesi Tip Fakultesi Hastanesi ( Site 2009)
- Sakarya Universitesi Egitim ve Arastirma Hastanesi ( Site 2012)
- City Clinical Hosp.4 of DCC ( Site 2102)
- MI Kryviy Rih Center of Dnipropetrovsk Regional Council ( Site 2101)
- MI Precarpathian Clinical Oncology Center ( Site 2105)
- Communal non profit enterprise Regional Clinical Oncology Center ( Site 2112)
- Medical Center Asklepion LLC ( Site 2115)
- Clinic of National Cancer Institute ( Site 2104)
- Medical and Diagnostic Centre LLC Dobryi Prognoz ( Site 2114)
- Lviv State Oncology Regional Treatment and Diagnostic Center ( Site 2106)
- MI Odessa Regional Oncological Centre ( Site 2108)
- Medical Centre LLC Oncolife ( Site 2103)
- Kyiv City Clinical Oncology Centre ( Site 2110)
- Royal Hospital in Derby ( Site 1514)
- Ninewells Hospital and Medical School ( Site 1504)
- Castle Hill Hospital ( Site 1501)
- University College London Hospital NHS Foundation Trust ( Site 1508)
- St Georges University Hospitals NHS Foundation Trust. ( Site 1500)
- Royal Marsden Hospital ( Site 1510)
- Royal Marsden NHS Foundation Trust ( Site 1512)
- The Christie Hospital NHS Foundation Trust ( Site 1503)
- Mount Vernon Cancer Centre ( Site 1507)
- Manor Hospital Walsall England ( Site 1515)
Arms of the Study
Arm 1
Arm 2
Experimental
Active Comparator
Pembrolizumab +Trastuzumab + Chemotherapy
Placebo +Trastuzumab + Chemotherapy
Participants receive 200 mg pembrolizumab IV every 3 weeks (Q3W) plus trastuzumab (8 mg/kg loading dose, 6 mg/kg maintenance thereafter) IV Q3W in combination with FP or CAPOX chemotherapy (Global Cohort) or SOX chemotherapy (Japan cohort).
Participants receive matched placebo to pembrolizumab IV Q3W plus trastuzumab (8mg/kg loading dose, 6mg/kg maintenance thereafter) IV Q3W in combination with FP or CAPOX chemotherapy (Global Cohort) or SOX chemotherapy (Japan cohort).