胃食管结合部癌Her－2基因扩增及蛋白表达与临床病理关系

目的：通过检测表皮生长因子－2（ Her－2）在胃食管结合部癌中的蛋白表达和基因扩增情况，探讨其与胃食管结合部癌患者的临床病理关系。方法采用免疫组织化学法（ IHC）和荧光原位杂交技术（ FISH）检测80例手术切除的胃食管结合部癌组织中Her－2的蛋白表达和基因扩增情况，并分析与胃食管结合部癌的病理分化程度、浸润深度、临床分期和淋巴结转移的关系。结果应用FISH技术检测显示在胃食管结合部癌组织中Her－2的蛋白阳性表达率为22．5％，应用IHC技术检测其在癌组织表达率为15％，Her－2基因扩增和蛋白阳性表达与胃食管结合部癌的分化程度和临床TNM分期有关（ P＜0．05），而与年龄、性别和浸润深度及淋巴结转移无相关性。结论 Her－2蛋白过表达和基因扩增是胃食管结合部癌患者的一个预后指标，与其发生发展有关，联合检测Her－2蛋白表达水平及基因扩增程度对于胃食管结合部癌的治疗和预后评估有一定指导意义。

The associat ion of Her-2 amplification and overexpression with clinicopathological faetures in adenocar-cinoma of the gastroesop hageal junction

Objective To study the protein expression and gene amplification of human epidermal growth factor receptor-2（Her-2）in adenocarcinoma of the gastroesophageal junction and its association with the clinicopathological features .Methods Immunohistochemical method and fluorescence in situ hybridization （ FISH） were used to detect Her -2 expression and gene amplification in 80 surgically resected gastroesophageal junction cancer tissue .We further analyzed the relationship between the gastroesophageal junction cancer histolog -ical differentiation ,as well as depth of invasion ,clinical stage and lymph node metastasis .Results Her-2 am-plification of gastroesophageal junction carcinoma by FISH was 22.5%,while the overexpression by IHC was 15%.Her-2 gene amplification and protein overexpression were correlated with the differentiation ,clinical TNM stage,invasive depth and lymph node metastasis of the carcinoma （all P〈0.05）.Her-2 expression was not asso-ciated with the patients age,gender,invasive depth and lymph node metastasis（P〈0.05）.Conclusion Her -2 protein expression and gene amplification may be a prognostic indicator for the patients with gastroesophageal junction cancer .The joint detection of Her -2 protein expression level and the gene amplification can guide the prognosis and therapy for adenocarcinoma of the gastroesophageal junction .