鼻咽癌组织中EGFR和p-ERK蛋白表达的检测及意义

目的 检测鼻咽癌组织中EGFR信号传导通路相关分子EGFR、p-ERK的表达,并对其与鼻咽癌患者预后的关系进行探讨。方法 采用免疫组化LSAB法对鼻咽癌组织中EGFR、p-ERK的表达进行检测,用统计学软件SPSS 10．0进行数据处理,分析蛋白表达与鼻咽癌的临床病理特征及预后的关系。结果 EGFR阳性表达率为70．9％;EGFR蛋白的表达与鼻咽癌临床分期（1992年全国第六届鼻咽癌会议制定）及性别相关。EGFR阳性患者的总生存期（OS）、疾病进展时间（TTP）显著低于阴性患者。p-ERK阳性表达率为52．7％;临床分期Ⅰ、Ⅱ期患者p-ERK蛋白的表达率明显低于Ⅲ、Ⅳ期患者;p-ERK阳性患者的OS、无病生存率（DFS）、TTP皆显著低于阴性患者。鼻咽癌组织中EGFR表达与p-ERK表达呈正相关。Cox多因素分析显示,年龄〉50岁是独立的不良预后因素,而EGFR和p-ERK的表达均不是独立的预后因素。结论 鼻咽癌组织中存在EGFR、p-ERK高表达。EGFR阳性患者的0S、TTP显著低于阴性患者;p-ERK阳性患者的OS、DFS、TTP均显著低于阴性患者。EGFR和p-ERK的表达均不是鼻咽癌独立的预后因素。

Significance of EGFR and p-ERK expression in nasopharyngeal carcinoma

Objective To detect the expression of EGFR and p-ERK in nasopharyngeal carcinoma (NPC) and investigate their clinical significance. Methods Immunohistochemistry LSAB method was adopted to detect the expression of EGFR and p-ERK. Statistical analysis was performed using SPSS statistical software package (10.0) to correlate their expression with clinical characteristics and prognosis. Results Positive staining for EGFR was observed in 39 of 55 cases (70.9%). The EGFR expression was correlated with clinical stage and gender. EGFR expression was correlated with poorer overall survival (OS) and shorter time to progression (TTP). Positive staining for p-ERK was observed in 29 of 55 cases (52.7%). There was a statistically significant association between positive p-ERK expression and advanced clinical stage. Positive p-ERK expression was correlated with poorer OS, disease-free survival (DFS) and TTP. EGFR expression was correlated with the expression of p-ERK. On multivariate analysis, age over 50 years was an independent poor prognostic factor for NPC. Both EGFR and p-ERK were not independent prognostic factors for NPC. Conclusion Expressions of EGFR and p-ERK are detected in NPC. Their abnormally high expression signifies poor prognosis in NPC patients.