A Study of Ametumumab in Combination With Anti-PD-1 Monoclonal Antibody and FOLFIRI in Patients With RAS Wild-type Advanced Colorectal Cancer

This is a multicenter, open-label, parallel-group, randomised, A phase IIb clinical trial of efficacy and safety of Ametumumab in combination with anti-PD-1 monoclonal antibody and FOLFIRI versus Ametumumab or Cetuximab in combination with FOLFIRI in patients with RAS wild-type advanced colorectal cancer.

Inclusion Criteria:Voluntarily sign written informed consent; Age 18 ~ 85 years (inclusive), male or female;•Patients requiring first-line treatment for locally advanced colorectal cancer with distant metastasis or unresectable disease; Histologically or cytologically confirmed adenocarcinoma of the colon or rectum; RAS (KRAS, NRAS) gene is wild-type and no BRAF V600E mutation has been identified; Presence of at least one measurable lesion (non-radiation field) confirmed by CT or MRI that meets RECIST 1.1 criteria; Performance status (ECOG) score 0 or 1.Exclusion Criteria:Previous chemotherapy for colorectal cancerPrevious treatment with anti-EGFR monoclonal antibodies Received systemic anti-tumor treatment approved or of other clinical studies within 4 weeks prior to the first dose.Radiotherapy or surgery within 4 weeks prior to enrollment, except for diagnostic biopsy Participation in other clinical trials within 4 weeks prior to enrollment; Severe skin disease requiring systemic treatment. Presence of serious clinical infection.\ Uncontrolled pleural effusion, pericardial effusion or peritoneal effusion after treatment.