近日,法國研究者們在《Nature Medicine 》發(fā)表了一項臨床I/II期研究成果“First-line durvalumab and tremelimumab with chemotherapy in RAS-mutated metastatic colorectal cancer: a phase 1b/2 trial”,揭示由PD-L1抑制劑(度伐利尤單抗)+CTLA-4抑制劑(tremelimumab)組成的雙免疫方案+標準化療,一線治療攜帶RAS突變的MSS型晚期CRC客觀緩解率(ORR)高達64.5%,患者中位無進展生存期(PFS)為8.2個月。