SLP-2在胃癌组织中的表达及其预后意义

 目的：探讨红细胞膜整合蛋白SLP-2（stomatin-like protein 2）在胃癌中的表达及其与临床病理学指标及预后的关系。方法：选取中山大学肿瘤防治中心病理科有完整临床资料的胃癌手术标本190例，应用免疫组织化学方法检测胃癌中SLP-2蛋白的表达，并分析其与临床病理特征及预后的关系。结果：（1）胃癌组织中SLP-2蛋白表达的阳性率为63.2%（120/190）。SLP-2表达与胃癌浸润深度、TNM分期及淋巴结转移有关（P<0.05），而与患者性别、年龄、肿瘤分化程度、肿瘤直径和远处转移均无关（P>0.05）；（2）Kaplan-Meier 生存曲线分析结果显示：SLP-2阳性表达患者的累积生存率明显低于阴性表达患者（P<0.01）；（3）单因素分析结果显示：SLP-2 的表达、淋巴结转移、肿瘤分化程度、肿瘤直径、TNM分期、浸润深度及远处转移均影响胃癌预后；多因素分析表明，只有肿瘤直径和TNM分期是独立的预后指标。结论：（1）SLP-2在胃腺癌组织中高表达，可能参与胃腺癌的发生发展和转移；（2）SLP-2在一定程度上影响胃癌的预后，其过度表达提示胃癌预后差。

Expression and prognostic significance of SLP-2 in gastric cancer

AIM: To investigate the expression of the red cell membrane integration protein SLP-2 (stomatin-like protein 2) in gastric cancer tissues and to analyze its correlation with clinicopathological manifestations and prognosis. METHODS: One hundred and ninety gastric cancer tissue samples with detailed clinical information were collected from the Department of Pathology, Sun Yat-sen University Cancer Center. The protein expression of SLP-2 in ganstric cancer was detected by the method of immunohistochemistry. The relationships between SLP-2 expression and the clinicopathological manifestations were evaluated. RESULTS: The positive rate of SLP-2 in gastric cancer tissue was 63.2% (120/190). SLP-2 expression was relevant to infiltration depth, TNM stage and lymph node metastasis (P<0.05). However, no statistical difference was observed in the SLP-2 expression associated with sex, age, differentiation, tumor size and distant metastases. Kaplan-Meier survival curves revealed that increased expression of SLP-2 was associated with poor prognosis in gastric adenocarcinoma patients (P<0.01). Based on the univariate analysis, 7 factors were found to have statistical significance of associations with overall survival, including SLP-2 expression, lymph node metastasis, histological grade, tumor size, invasive depth, distant metastases and the 7th edition of the UICC TNM classification. Only the tumor size and the 7th edition of the UICC TNM classification were independent prognostic factors for overall survival in the multivariate analysis. CONCLUSION: SLP-2 is highly expressed in gastric adenocarcinoma tissues and may play an important role in tumor progression and metastasis. Although SLP-2 is not an independent prognostic factor, it may influence the prognosis of gastric cancer. Increased expression of SLP-2 can be used for predicting unfavorable prognosis in gastric adenocarcinoma patients.