转移性结直肠癌分子靶向治疗临床研究进展

 转移性结直肠癌应用最多的靶向药物包括贝伐珠单抗和西妥昔单抗。贝伐珠单抗和西妥昔单抗均是单克隆抗体，作用靶点分别为血管内皮生长因子（VEGF）和表皮生长因子受体（EGFR）。在转移性结直肠癌，无论是一线还是二线治疗，靶向药物联合化疗均可增加疗效，延长患者的生存。靶向药物联合化疗增加肝转移灶的切除率。k-ras基因突变是西妥昔单抗的疗效预测因子。对于贝伐珠单抗目前尚无明确的疗效预测因子。

Progress on target therapy in colorectal cancer

Target therapy is a major progress in treatment of advanced colorectal cancer. Cetuximab and bevacizumab are the most widely used target agents in colorectal cancer, which target against EGFR and VEGF respectively. The addition of target agent to chemotherapy improve efficacy and prolong survival in the first line setting, as well as in the second line setting. The increased respectability of liver metastases from colorectal cancer is of great importance, k-ras gene mutation is a definite predictor of cetuximab, however, there is no clear predictor for bevacizumab.