唾液腺腺样囊性癌FAK和PTEN蛋白的表达及意义

目的：探讨黏着斑激酶（FAK）和PTEN基因蛋白在腺样囊性癌组织中的表达及意义。方法：采用SP免疫组织化学方法，检测50例唾液腺腺腺样囊性癌组织中FAK和PTEN蛋白的表达。所得实验数据采用SPSS10．0统计软件进行方差分析，t检验进行组间比较。FAK与PTEN蛋白表达进行相关分析。结果：50例唾液腺腺样囊性癌组织中FAK的阳性检出率为94％（47／50），FTEN的阴性检出率为70％（35／50）；而在对照组中，FAK的阳性检出率仅为17％（2／12），FTEN的阴性检出率为0（0／12）。2者在腺样囊性癌组织与正常唾液腺腺组织中的检出率和染色强度均有显著性差异（P〈0．01）。FAK和PTEN在SACC的3种组织病理学分型，即腺样型、管状型、实体型中的检出率及染色强度组间差异均无显著性（P〉0．01）。FAK与PTEN在腺样囊性癌组织中的表达强度呈负相关（P〈0．01）。结论：FAK在腺样囊性癌组织中高表达，与该肿瘤的发生有关。腺样囊性癌组织中存在PTEN表达缺失，PTEN在部分腺样囊性癌病变发展中起一定作用。FAK和PTEN表达异常与SACC的组织病理学分型无关。

The expression of tumor suppressor gene PTEN protein and focal adhesion kinase in salivary adenoid cystic carcinoma and its significance

PURPOSE: To investigate the expression of focal adhesion kinase(FAK) and PTEN in salivary adenoid cystic carcinoma (SACC) and its significance. METHODS: The expression levels of FAK and PTEN in 50 cases of SACC were detected by strepravidin-peroxidase immunohistochemical technique. SPSS10.0 software was used for Chi-square test, paried Student t test and correlation analysis. RESULTS: The expressions of FAK in salivary adenoid cystic carcinoma was 94%, and the negative expressions of PTEN was 70%.There was a significant difference between normal salivary gland and salivary adenoid cystic carcinoma (P<0.01). A significant negative relation was found between the expression intensity of FAK protein and PTEN protein(P<0.01).No correlation between the expression intensity in cribriform,tubular, and solid group was found. CONCLUSIONS: Activation of FAK may play a strong role in the development of SACC. PTEN was abnormally expressed in SACC. No significant different expression of FAK and PTEN were found in different clinic pathological types.