Phase II Study of EMB-01 in Recurrent/Metastatic Colorectal Cancer Patients

This is a randomized, open-label Phase II dose-optimization study of EMB-01 in patients with metastatic colorectal cancer (CRC). The study will enroll patients with recurrent/metastatic KRAS/BRAF wild-type left-sided CRC who have progressed, relapsed, or become intolerant after first- or second-line systemic therapy. Patients will be stratified by prior anti-EGFR therapy and randomized 1:1 into two groups. Group 1 will receive EMB-01 1600 mg once weekly (QW). Group 2 will receive EMB-01 1600 mg QW for the first 6 weeks, followed by 1600 mg once every two weeks (Q2W). Tumor assessments will follow RECIST v1.1 using CT and/or MRI. Baseline imaging will be performed within 28 days before enrollment. During the study, imaging and efficacy assessments will occur every 6 weeks for the first 12 cycles, and every 3 cycles thereafter. All imaging procedures must be consistent with baseline. Assessments will be performed by the investigator, with retrospective independent review if needed.