MSS Metastatic Colorectal Cancer

This is an open-label, randomized, multicenter Phase 2 study to assess the efficacy and safety of FOLFIRI + bevacizumab + pelareorep vs. FOLFIRI + bevacizumab in patients with RAS-mutated, MSS mCRC who have progressed after one prior line of oxaliplatin-based therapy.

The goal of this phase II randomized controlled clinical trial is to evaluate whether adding lubiprostone to standard postoperative maintenance therapy can delay disease progression and recurrence in adult patients with colorectal cancer and peritoneal metastases (PM-CRC) who have undergone cytoreductive surgery with or without HIPEC after systemic treatment. The main questions it aims to answer are: Does lubiprostone plus maintenance therapy improve the 1-year progression-free survival (PFS) rate compared with maintenance therapy alone? Is lubiprostone safe and feasible for long-term use during the maintenance period in this PM-CRC population? Researchers will compare lubiprostone + maintenance therapy versus maintenance therapy alone to see if the addition of lubiprostone prolongs PFS, reduces the risk of distant metastasis, improves overall survival, and maintains or improves quality of life. Participants will: Be randomly assigned to receive maintenance therapy with lubiprostone or maintenance therapy alone after surgery (CRS ± HIPEC) and prior systemic therapy, according to the study protocol. Undergo scheduled follow-up assessments for disease status (progression/recurrence), survival outcomes, treatment-related toxicity, and quality of life using the EORTC QLQ-C30 (v3.0) questionnaire.

The goal of this clinical trial is to learn about Fruquintinib combined with Adebrelimab and high and low dose radiotherapy in the treatment of second-line and above failure MSS(microsatellite stability) metastatic colorectal cancer. The main question it aims to answer is: The efficacy and safety of Fruquintinib combined with Adebrelimab and high and low dose radiotherapy in the third line and beyond treatment of MSS metastatic colorectal cancer. Participants will receive the combination of Fruquintinib and Adebrelimab within 3 weeks after completion of high and low dose radiotherapy on metastases until disease progression or intolerable toxicity occurred.