EB病毒感染和p16INK4a蛋白过表达与胃腺癌的关系

目的 探讨Epstein-Barr Virus(EBV)感染与p16异常表达在胃腺癌发生发展中的作用.方法 应用检测免疫组化法检测EB病毒潜伏感染膜蛋白-1(LMP-1)和p16蛋白在97份胃腺癌组织中表达.结果 97份胃腺癌组织中30例LMP-1蛋白表达阳性,阳性率为30.9%,EBV阳性率与患者性别、浸润深度、淋巴结转移、组织学分型和临床分期之间无明显关系(P>0.05);p16蛋白在胃腺癌组织中过度表达,阳性率为63.91%,p16过度表达与患者性别、肿瘤组织学类型、浸润深度不相关,而与淋巴结转移和临床分期相关;EBV感染与p16阳性表达之间无显著相关性(P>0.05).结论 ①EBV感染在胃腺癌的发生中起一定作用;②胃腺癌组织中p16蛋白过度表达是频发事件,p16是重要的预后指标之一;③EBV感染与p16异常表达在胃腺癌发生中是两个独立因素.

Epstein-Barr virus infection and p16INK4a overexpression in gastric adenocarcinoma

Objective To study Epstein-Barr vires infection and p16 protein abnormal expresson in carcinogenesis and progression of gastric adenocarcinomas (GAC). Methods Immunohistochemical staining SP method was used to detect the expression of LMP-1 and p16 in 97 cases of GAC. Results EBV LMP-1 and p16 protein were detected in 30.9% (30/97) and in 63.91% (62/97) cases of gastric adenocarcinomas respectively.There was no significant difference between EBV-positive and EBV-negative gastric carcinomas in sex, histologic type, depth of tumor invision, lymph node metastasis and clinical stages (P>0.05);overexpression of p16 was associated with lymph node metastasis and clinical stages; no correlation was found between the expression of EBV LMP-1 and p16 protein. Conclusion ①EBV play a role in carcinogensis of GAC. ②P16 gene abnormality is frequently involved in GAC and might be one of the important prognostic factors. ③EBV infection and p16 alteration are two independent roles in GAC carcinogenesis.