摘要目的 探讨不同方法检测胃癌中Her-2蛋白表达和基因表达的相关性,寻求胃癌中Her-2检测的有效手段.方法 应用免疫组织化学方法(IHC)对68例胃癌进行Her-2蛋白标记,同时采用荧光原位杂交技术(FISH)检测Her-2基因扩增的情况.结果 68例胃癌患者中,IHC检测Her-2蛋白阳性12例(1765％),分别+++3例,++9例、+7例和-49例；FISH检测Her-2基因扩增11例(16.17％),与IHC阳性强度相对应的FISH检测结果分别为3例(100％)、8例(88.89％)、0例、0例.Her-2基因扩增与Her-2蛋白表达存在相关性(P＜0.05).结论 胃癌中存在Her-2蛋白的表达和基因扩增,Her-2蛋白在胃癌中的表达呈现明显的异质性.IHC与FISH检测胃癌Her-2的表达差异主要在IHC++组,IHC++有意愿进行Her-2基因靶向治疗的患者建议进行Her-2基因检测.

abstractsObjective To investigate the association of Her-2 protein expression and gene expression in gastric cancer by different methods,and to explore the effective approaches of Her-2 in gastric cancer detection.Methods Immunohistochemistry (IHC) was used to mark Her-2 protein in 68 cases of gastric cancer,and fluorescence in situ hybridization(FISH)wasused to detect the Her-2 gene amplification.Results Among 68 cases,IHC Her-2 protein in 12 cases(17.65 ％)was positive expression,including ++ 3 cases ++ 9 cases,+ 7 cases and-49 cases.By FISH,Her-2 gene in 11 cases(16.17 ％)was overexpression.Corresponding to the IHC results,FISH results was 3 cases(100 ％),8 cases(88.89 ％),0 cases,0 cases,respectively.Conclusion Her-2 protein expression and gene overexpression occur in gastric cancer.Her-2 protein expression in gastric cancer shows significant heterogeneity.Her-2 gene overexpression and Her-2 protein expression is correlated (P＜0.05).The differences of Her-2 expression in gastric cancer by IHC and FISH mostly occur in IHC++ groupe.Suggestion of Her-2 gene test should be given for patients with IHC++ who will be undertaken Her-2 gene therapy.