摘要目的 探讨MAGE-A3、MAGE-A4、MAGE-A10基因在结直肠原发腺癌组织中的蛋白表达及临床意义.方法 采用组织芯片技术、免疫组化方法分析多种MAGE基因在97例结直肠原发腺癌配对癌组织、癌旁组织中的蛋白表达.统计学方法采用x2检验.结果 MAGE-A3,MAGE-A4,MAGE-A10蛋白在97例结直肠原发腺癌组织中的表达率分别为57％(56/97),63％(61/97),28％(27/97).MAGE-A3在低分化腺癌中的表达率明显高于中分化和高分化腺癌中的表达率(x2=9.133,P=0.010).MAGE-A10在低分化腺癌中的表达率明显高于中分化和高分化腺癌(x2=15.280,P=0.000)；在TNMⅢ+Ⅳ期中的表达率明显高于Ⅰ+Ⅱ期(x2=4.227,P=0.040)；在有淋巴结转移原发灶中的表达率明显高于无淋巴结转移原发灶(x2 =5.557,P=0.018)；且随淋巴结转移数目的增多在原发灶表达率显著增高(x2=7.296,P=0.026).结论 MAGE基因的蛋白表达与结直肠癌的病理组织学分化、TNM分期、癌淋巴结转移有关.MAGE-A3和MAGE-A10可能成为结直肠癌的预后标志物及结直肠癌免疫治疗的候选靶点.

abstractsObjective To explore protein expression and significance of MAGE genes in colorectal carcinoma(CRC)tissues.Methods The expression of MAGE genes were studied by using tissue chip and immunochemistry methods in primary CRC tissue and paired adjacent tissue samples in 97 cases.Data were analyzed with x2-test by SPSS 16.0 software.Results The protein expression of MAGE-A3,MAGE-A4 and MAGE-A10 genes were 57％(56/97),63％(61/97)and 28％(27/97)respectively in 97 cases of primary adenocarcinoma.The protein expression frequency of MAGE-A3 in poor colorectal adenocarcinomas was significantly higher than in well-and moderately disfferentiated adenocarcinomas(x2 =9.133,P =0.010).MAGE-A10 in poor colorectal primary adenocarcinomas was significantly higher than in well and moderately adenocarcinomas(x2 =15.280,P =0.000); MAGE-A10 protein expression was significantly higher in stage TNM Ⅲ + Ⅳ than in stage TNM Ⅰ + Ⅱ(x2 =4.227,P=0.040); MAGE-A10 gene expression was higher in metastasis lymphoid node than in no metastasis lymphoid node(x2 =5.557,P =0.018),and the expression level was higher in primary lesion with the increasing of the numbers of lymphoid node metastasis(x2 =7.296,P =0.026).Conclusions The protein expression of MAGE genes is associated with the tumor differentiation,TNM stage and lymphoid node metastasis.MAGE-A3 and MAGE-A10 genes are the possible prognosis marker and potential target of immunotherapy of CRC.