More than half of colorectal cancer (CRC) patients present with RAS mutations or right-sided primary tumors; however, objective response rates (ORRs) to bevacizumab combined with chemotherapy remain suboptimal. Additionally, approximately 95% of metastatic CRC (mCRC) cases are microsatellite stable (MSS), where immune checkpoint inhibitor monotherapy demonstrates limited efficacy, necessitating combination strategies. Iparomlimab/tuvonralimab is the first bifunctional combination of anti-PD-1/anti-CTLA-4 monoclonal antibodies, which has shown therapeutic promise in first-line mCRC when combined with bevacizumab and capecitabine plus oxaliplatin (CAPEOX). Nevertheless, whether improved treatment response rates in mCRC patients can lead to higher surgical conversion rates remains unclear. This study evaluates the efficacy and safety of iparomlimab/tuvonralimab combined with bevacizumab and CAPEOX as conversion therapy in patients with right-sided or RAS-mutant, MSS, initially unresectable colorectal cancer liver metastasis.
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Objective Response Rate
Timeframe: Following 3 or 6 cycles (each cycle is ~21 days) of the treatment, approximately 9 or 18 weeks overall