Irinotecan Plus Anlotinib or Further in Combination With Penpulimab for Second-line Treatment of mCRC

The design of this study is an open, non-controlled, multi-cohort, phase II, small-sample prospective clinical study, including eligible patients with metastatic colorectal cancer who received the second-line treatment, and two cohort were included, Cohort A received anlotinib and irinotecan chemotherapy (n=23), and the treatment of cohort B consisted of anlotinib and anti-PD-1 mab (penpulimab) plus irinotecan chemotherapy. Patients were firstly enrolled in cohort A, and if patients in cohort A achieved an response rate of no less than 15% (i.e., no less than 4 out of 23 patients receiving efficacy evaluation achieved CR/PR), the following patients would be enrolled in cohort B. If the response rate of patients in cohort A was less than 15%, subsequent cohort B enrollment (non-control) would be stopped. A total of 46 patients enrolled in this study, actually.