EGFR,PDCD4,TGF-β1,Smad3,Smad7在中国地鼠口腔颊囊黏膜癌变过程中的表达研究

摘要

目的 探讨EGFR,PDCD4,TGF-β1,Smad3,Smad7在口腔正常黏膜、上皮单纯增生、上皮异常增生和鳞状细胞癌组织中的表达及意义.方法 采用ELISA对中国地鼠口腔黏膜癌变过程中血清EGFR,PDCD4水平进行检测;采用免疫组织化学法检测正常口腔黏膜上皮,单纯增生上皮、异常增生上皮和鳞癌组织中TGF-β1,Smad3,Smad7的表达.结果 在口腔黏膜癌变过程中血清EGFR蛋白呈升高趋势,血清PDCD4的表达呈降低趋势,呈负相关.鳞癌组织中TGF-β1、Smad7表达明显高于口腔正常黏膜、上皮单纯增生、上皮异常增生(P < 0.05),而Smad3作用减弱.相关性分析显示,口腔异常增生上皮、口腔鳞癌组织中TGF-β1表达与Smad7呈正相关(P < 0.05).结论 EGFR,PDCD4,TGF-β1,Smad3,Smad7表达与口腔鳞癌的生物学行为关系密切,本实验为研究口腔鳞癌机理研究提供了理论依据,对口腔鳞癌的发展与预后有重要意义.%Objective To study the expression and significance of EGFR, PDCD4, TGF-β1, Smad3, Smad7 in oral normal mucosa, oral simple hyperplasia, oral epithelial dysplasia and oral squamous cell carcinomas(OSCC).Methods Serum levels of EGFR, PDCD4 were measeured with ELISA in Chinese hamster during the oral mucosa carcinogenesis;The expressions of TGF-β1, Smad3, Smad7 in oral normal mucosa, oral simple hyperplasia, oral epithelial dysplasia and OSCC tissues were examined by immunohistochemistry.Results In the process of oral carcinogenesis,the expression level of EGFR increased significantly,while the expression of PDCD4 was decreased, the negatively correlation was evident between expression of these two proteins in ED and SCC.The expression of TGF-β1, Smad7 was higher in OSCC than in oral normal mucosa, oral simple hyperplasia, oral epithelial dysplasia(P < 0.05), while the expression of Smad3 was decreased.Further analysis showed the expression of TGF-β1 was correlated with the expression of Smad7.Conclusions The expressions of EGFR, PDCD4, TGF-β1, Smad3, Smad7 are closely related with the biological behaviors of oral squamous cell cancinoma.This experiment provides a theoretical basis for the study of oral squamous cell carcinomas mechanism research.So it has important significance for the development and prognosis of oral squamous carcinomaare.