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Bemarituzumab Plus Chemotherapy and Nivolumab Versus Chemotherapy and Nivolumab for FGFR2b Overexpressed Untreated Advanced Gastric and Gastroesophageal Junction Cancer.

NCT05111626

TerminatedPhase 3

Sponsor: Amgen

Conditions: Gastric Cancer, Gastroesophageal Junction Adenocarcinoma

Interventions: Bemarituzumab, Nivolumab, Chemotherapy, Placebo

Countries: United States, Argentina, Australia, Austria, Belgium, Brazil, Bulgaria, Canada

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 chemotherapy (mFOLFOX6 or capecitabine combined with oxaliplatin (CAPOX)) and nivolumab to placebo plus chemotherapy (mFOLFOX6 or CAPOX) and nivolumab as assessed by overall survival.

Eligibility overview

Sex: ALL

Age: 18 Years to 100 Years

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Inclusion Criteria 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 nivolumab and either mFOLFOX6 or CAPOX chemotherapy as per local prescribing information. Participants in Part 1 must have no contraindications to mFOLFOX6. Participants in Part 2 with contraindications to mFOLFOX6 are permitted and may be administered the CAPOX regimen, if no contraindications for this regimen exist. Participants in Part 2 with contraindications to CAPOX are permitted and may be administered the mFOLFOX6 regimen, if no contraindications for this regimen exist
* 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)
  * Part 1 only: Calculated or measured creatinine clearance (CrCl) of ≥ 50 mL/minute calculated using the formula of Cockcroft and Gault (\[140 - Age\] × Mass \[kg\]/\[72 × Creatinine mg/dL\]) (x 0.85 if female).
* Part 2 only: Calculated or measured creatinine clearance (CrCl) of ≥ 30 mL/minute calculated using the formula of Cockcroft and Gault (\[140 - Age\] × Mass \[kg\]/\[72 × Creatinine mg/dL\]) (x 0.85 if female).
* 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 chemotherapy 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.

Exclusion Criteria:

* 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

Locations (348)

Phoenix, Arizona, United States
Cerritos, California, United States
Downey, California, United States
Duarte, California, United States
Los Angeles, California, United States
Orange, California, United States
Redondo Beach, California, United States
Santa Monica, California, United States
Santa Monica, California, United States
Sylmar, California, United States
Whittier, California, United States
New Haven, Connecticut, United States
Fort Myers, Florida, United States
Jacksonville, Florida, United States
Orlando, Florida, United States
Orlando, Florida, United States
Chicago, Illinois, United States
Baltimore, Maryland, United States
Detroit, Michigan, United States
Rochester, Minnesota, United States
Florham Park, New Jersey, United States
New York, New York, United States
Stony Brook, New York, United States
Pinehurst, North Carolina, United States
Canton, Ohio, United States
Portland, Oregon, United States
Allentown, Pennsylvania, United States
Charleston, South Carolina, United States
Germantown, Tennessee, United States
Nashville, Tennessee, United States
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