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Fruquintinib Plus Camrelizumab and Capecitabine as Salvage Therapy After Progression on FOLFOXIRI-based First-line Treatment in Patients With Unresectable/Metastatic Colorectal Cancer

FOLFOXIRI-based regimen is more used as a first-line therapeutic approach for patients diagnosed with unresectable or metastatic colorectal cancer for its superior efficacy. However, there are no standard recommendations for second-line therapy after progression on FOLFOXIRI with or without targeted therapy. Here, the investigators conduct this open-label, single arm phase II study to evaluate whether fruquintinib in combination with camrelizumab and capecitabine can be the salvage therapy following FOLFOXIRI based regimen for mCRC. Patients diagnosed with unresectable or metastatic colorectal cancer progression on FOLFOXIRI-based regimen are included;or patients have progression or untolerated toxicity with irinotecan, oxaliplatin and fluorouracil successively within one year; patients with BRAF mutation were allowed to receive BRAF inhibitor therapy with or without MEK inhibitor therapy after FOLFOXIRI-based regimen. Patients participated in this study will receive fruquintinib 5 mg once daily, 2 weeks on/1 week off, plus camrelizumab 200 mg Q3W and capecitabine 750mg/square meter twice, 2 weeks on/1 week off, repeated every three weeks. The primary endpoint is Objective Response Rate(ORR). The investigators estimated that 30 patients were necessary. Secondary endpoints include progression-free survival, overall survival, safety, and exploratory ctDNA for efficacy prediction for unresectable or metastatic colorectal cancer.