目的 研究Rac1和E-钙黏蛋白(E-cadherin)在口腔癌中的表达及其相关性,并探讨与口腔癌临床病理参数的关系.方法 采用免疫组织化学SP法对22例口腔癌及8例癌旁组织标本中Rac1和E-cadherin的表达进行检测.根据临床病理参数对患者进行分组,分析各组之间Rac1和E-cadherin的表达有无差异.结果 癌旁组织与癌组织中Rac1阳性表达率分别为1/8和77.3%(17/22),癌组织中Rac1阳性表达率明显高于癌旁组织,差异有统计学意义(P=0.003).癌旁组织与癌组织E-cadherin阳性表达率分别为8/8和31.8%(7/22),癌组织中E-cadherin阳性表达率明显低于癌旁组织,差异有统计学意义(P=0.002).Rac1和E-cadherin的表达在不同年龄、性别患者间差异无统计学意义,Rac1表达在肿瘤有无转移患者间差异有统计学意义(P=0.021),E-cadherin表达在肿瘤有无转移患者间差异无统计学意义.Rac1和E-cadherin在口腔癌中的表达无明显相关性.结论 Rac1蛋白高表达和E-cadherin蛋白低表达可能在口腔癌的发生发展过程中起关键作用.%Objective To investigate the expression levels of Rac1 and E-cadherin and their correlation in oral squamous cell carcinoma, and to explore their relations to clinical pathological parameters. Methods The expression levels of Rac1 and E-cadherin were detected in 22 samples of oral squamous cell carcinoma and 8 samples of para-carcinoma tissue by using immunohistochemistry technique (SP). The patients were divided into two groups according to the clinicopathological parameters. The differences of Rac1 and E-cadherin expression levels were analyzed between the groups. Results The positive expression rates of Rac1 were 1/8 and 77.3%(17/22) in para-carcinoma tissue and oral squamous cell carcinoma, respectively. The difference was statistically significant (P=0.003). The positive expression rates of E-cadherin were 8/8 and 31.8%(7/22), and there was a difference between them (P=0.002). The Rac1 protein expression rate was increased and E-cadherin was decreased in oral squamous cell carcinoma. There were no significant differences in Rac 1 and E-cadherin between different age and gender groups. There was significant difference in Rac1 expression between patients with metastasis and patients without metastasis (P=0.021). While there was no difference in E-cadherin expression between patients with metastasis and patients without metastasis. No correlation was found between Rac 1 and E-cadherin expressions in oral squamous cell carcinoma. Conclusion The high expression of Rac1 and low expression of E-cadherin may play an important role in the tumorigenesis and progression of oral squamous cell carcinoma.
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