Efficacy and Safety of IMAB362 in Combination With the EOX Regimen for CLDN18.2-positive Gastric Cancer (FAST)
CLDN18.2-positive Adenocarcinoma of the Gastroesophageal Junction, CLDN18.2-positive Adenocarcinoma of Esophagus, CLDN18.2-positive Gastric Adenocarcinoma

About this trial
This is an interventional treatment trial for CLDN18.2-positive Adenocarcinoma of the Gastroesophageal Junction focused on measuring IMAB362, ASP8951, zolbetuximab
Eligibility Criteria
Inclusion Criteria:
- Histologically confirmed adenocarcinoma of the stomach, the esophagus or the gastroesophageal junction
- Inoperable locally advanced disease or resections with R2 outcome or recurrent or metastatic disease.
- CLDN18.2 expression confirmed by immunohistochemistry in paraffin embedded tumor tissue sample.
- Measurable and/or non-measurable disease as defined according to RECISTv1.1
- Age ≥ 18 years
- Written Informed Consent Form
- ECOG performance status (PS) 0-1
- Life expectancy > 3 months
- HER2/neu negative patients and patients with HER2/neu positive status but not eligible to trastuzumab therapy in discretion of the investigator.
- Adequate cardiac, hepatic, renal, hematologic function.
Exclusion Criteria:
- Prior severe allergic reaction or intolerance to a monoclonal antibody, to the chemotherapeutics used in this study or any excipient in the respective formulations.
- Previous chemotherapy for advanced disease.
- Previous perioperative chemotherapy with curative intention within 6 months of start of study treatment. If interval is longer than 6 months (counted from the stop date of the perioperative chemotherapy), patients are allowed.
- Known HIV infection or known symptomatic hepatitis (A, B, C).
- Symptomatic cerebral metastases.
- Pregnancy or breastfeeding.
- Previous treatments with maximum cumulative doses of epirubicin > 500 mg/m² and/or other anthracyclines and anthracenediones.
- Known dihydropyrimidine dehydrogenase (DPD) deficiency.
Sites / Locations
- Site BUL004
- Site BUL001
- Site BUL003
- Site BUL005
- Site BUL002
- Site CZE002
- Site CZE001
- Site GER012
- Site GER029-01
- Site GER029
- Site GER010
- Site GER001
- Site GER017
- Site GER005
- Site GER020
- Site GER016
- Site GER013
- Site LAT001
- Site LAT002
- Site RUS011
- Site RUS016
- Site RUS006
- Site RUS007
- Site RUS009
- Site RUS001
- Site RUS017
- Site RUS002
- Site RUS023
- Site RUS012
- Site RUS014
- Site RUS005
- Site RUS019
- Site RUS003
- Site RUS010
- Site RUS015
- Site RUS013
- Site UKR003
- Site UKR001
- Site UKR002
- Site UKR008
- Site UKR005
- Site UKR007
- Site UKR006
- Site UKR015
- Site UKR004
- Site UKR011
- Site UKR010
- Site UKR009
Arms of the Study
Arm 1
Arm 2
Arm 3
Active Comparator
Experimental
Experimental
EOX Treatment
EOX+zolbetuximab 800/600 mg/m^2
EOX+zolbetuximab 1000 mg/m^2
Participants will receive up to 8 cycles of epirubicin, oxaliplatin and capecitabine (EOX) chemotherapy treatment alone (50 mg/m^2 epirubicin intravenously on day 1 of each cycle, 130 mg/m^2 oxaliplatin intravenously on day 1 of each cycle, 625 mg/m^2 capecitabine orally twice daily on days 1 to 21 of each cycle). The first dose of capecitabine to be taken in the evening of day 1.
Participants will received up to 8 cycles of EOX chemotherapy treatment in combination with zolbetuximab administered as loading dose of 800 mg/m^2 intravenously on day 1 of cycle 1 followed by 600 mg/m^2 intravenously on day 1 of each subsequent cycle. Zolbetuximab to be administered prior to EOX chemotherapy. After completion of the EOX treatment phase, participants will be permitted to continue zolbetuximab monotherapy (600 mg/m^2 every 3 weeks to be administered intravenously as a 2-hour infusion) until progressive disease (PD), withdrawal of consent or unacceptable toxicity. PD per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 is defined as at least a 20% increase in the sum of the longest diameter of target lesions, taking as reference the smallest sum on study, an absolute increase of at least 5mm must also be demonstrated, unequivocal progression of existing non-target lesions and appearance of one or more new lesions is considered progression.
Participants will receive up to 8 cycles of EOX chemotherapy treatment in combination with zolbetuximab 1000 mg/m^2 intravenously on day 1 of each cycle. Zolbetuximab to be administered prior to EOX chemotherapy. After completion of the EOX treatment phase, participants will be permitted to continue zolbetuximab monotherapy (1000 mg/m^2 every 3 weeks administered intravenously as a 2-hour infusion ) until PD, withdrawal of consent or unacceptable toxicity.