for people ages 18-100 (full criteria)
at Orange, California and other locations
study started
estimated completion



The main objective of Part 1 is to evaluate the safety and tolerability of bemarituzumab plus 5-fluorouracil, leucovorin, and oxaliplatin (mFOLFOX6) and nivolumab.

The main objective Part 2 is to compare efficacy of bemarituzumab plus mFOLFOX6 and nivolumab to placebo plus mFOLFOX6 and nivolumab as assessed by overall survival.

Official Title

A Phase 1b/3 Study of Bemarituzumab Plus Chemotherapy and Nivolumab Versus Chemotherapy and Nivolumab Alone in Subjects With Previously Untreated Advanced Gastric and Gastroesophageal Junction Cancer With FGFR2b Overexpression


Gastric Cancer, Gastroesophageal Junction Adenocarcinoma, Bemarituzumab, AMG 552, 5-Fluorouracil, Leucovorin, and Oxaliplatin (mFOLFOX6), Nivolumab, FGFR2b Overexpression, Adenocarcinoma, Stomach Neoplasms, Esophageal Neoplasms, mFOLFOX6


You can join if…

Open to people ages 18-100

Part 1 and Part 2:

- Adult with unresectable, locally advanced or metastatic (not amenable to curative therapy) histologically documented gastric or gastroesophageal junction adenocarcinoma - Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1 - Measurable disease or non-measurable, but evaluable disease, according to Response Evaluation Criteria in Solid Tumours version 1.1 (RECIST v1.1) - Participant has no contraindications to mFOLFOX6 chemotherapy or nivolumab - Adequate organ function as follows: - Absolute neutrophil count ≥ 1.5 x 10^9/L - Platelet count ≥ 100 x 10^9/L - Hemoglobin ≥ 9 g/dL without red blood cell (RBC) transfusion within 7 days prior to the first dose of study treatment - Aspartate aminotransaminase (AST) and Alanine aminotransaminase (ALT) <3 x upper limit of normal (ULN) (or < 5 x ULN if liver involvement) - Total bilirubin <1.5 x ULN (or < 2 x ULN if liver involvement or Gilbert's disease) - Calculated or measured creatinine clearance (CrCl) of ≥ 50 mL/minute calculated using the formula of Cockcroft and Gault - International Normalized Ratio (INR) or prothrombin time (PT) < 1.5 × ULN except for participants receiving anticoagulation, who must be on a stable dose of anticoagulant therapy for 6 weeks prior to enrollment Additional Inclusion Criteria Part 2: - No prior treatment for metastatic or unresectable disease except for a maximum of 1 dose of mFOLFOX6 with or without nivolumab. Prior adjuvant, neo-adjuvant, and peri-operative therapy is allowed, provided it has been completed more than 6 months prior to the first dose of study treatment - Fibroblast growth factor receptor 2b (FGFR2b) ≥ 10% 2+/3+ tumor cells (TC) as determined by centrally performed immunohistochemistry (IHC) testing, based on tumor sample either archival (obtained within 6 months/180 days prior to signing pre-screening informed consent) or a fresh biopsy.

You CAN'T join if...

  • Prior treatment with any selective inhibitor of the fibroblast growth factor (FGF)-FGFR pathway
  • Known positive human epidermal growth factor receptor 2 (HER2) status
  • Untreated or symptomatic central nervous system disease metastases and leptomeningeal disease
  • Peripheral sensory neuropathy grade 2 or higher
  • Clinically significant cardiac disease
  • Other malignancy within the last 2 years (exceptions for definitively treated disease)
  • Chronic or systemic ophthalmologic disorders
  • Major surgery or other investigational study within 28 days prior to randomization
  • Palliative radiotherapy within 14 days prior to randomization
  • Abnormalities of the cornea that may pose an increased risk of developing a corneal ulcer
  • Active autoimmune disease that has required systemic treatment (except replacement therapy) within the past 2 years or any other diseases requiring immunosuppressive therapy while on study


  • University of California Irvine accepting new patients
    Orange California 92868 United States
  • The Oncology Institute Clinical Research accepting new patients
    Whittier California 90603 United States
  • Presbyterian Intercommunity Hospital Health Whitter Hospital accepting new patients
    Whittier California 90602 United States
  • Cancer and Blood Specialty Clinic accepting new patients
    Downey California 90241 United States
  • University of California Los Angeles accepting new patients
    Los Angeles California 90095 United States


accepting new patients
Start Date
Completion Date
AmgenTrials clinical trials website
Phase 3 research study
Study Type
Expecting 528 study participants
Last Updated