【摘要】 目的探讨抑癌基因PTEN在胃癌组织中的表达水平及与其生物学行为的关系。方法应用免疫组织化学EnVision法检测116例胃癌组织,35例癌旁异型组织,56例癌旁正常黏膜组织中的PTEN蛋白表达情况。结果胃癌组织中PTEN阳性率为53.4 %(62/116),显著低于异型增生、癌旁正常黏膜组织中的阳性率71.4 %(25/35)、100 %(56/56)(P<0.001)。在各组织学类型中,高中分化腺癌PTEN蛋白阳性表达率最高(72.7 %,32/44),显著高于印戒细胞癌(29.2 %,7/24),P<0.001。PTEN蛋白的表达与淋巴结转移、侵袭程度密切相关(P<0.05)。结论PTEN基因的异常改变与胃癌的发生发展密切相关,可能是胃癌进一步恶化的标志之一,可作为胃癌生物学行为的参考指标,为胃癌的基因治疗提供参考依据。更多还原

【Abstract】 Objective To study the expression of suppressor gene PTEN in gastric cancer tissues and its relationship with tumor biologic characteristics. Methods Using EnVision immunohistochemical methods, we examined the suppressor gene PTEN expression in 116 cases of gastric cancer, 35 cases dysplasia and 56 cases normal gastric mucosa specimens. Results The positive rate of PTEN (53.4 %, 62/116) was lower in gastric cancer tissue than in dysplasia (71.4 %, 25/35) and normal gastric mucosa specimens(100 %, 56/56) (P <0.001). Well and moderately differentiated carcinoma expressed PTEN stood the highest(72.7 %, 32/44), which was higher than signet ring cell carcinoma(29.2 %,7/24)(P <0.001). The expression of PTEN was positively correlated to the infiltration of stomach and lymph node metastasis(P <0.05). Conclusions The abnormal expression of suppressor gene PTEN played an important role in the genesis and development of gastric cancer and could be used as a predictor of malignant potential and prognosis. It was helpful to work out the gene therapeutic regimen of gastric cancer.更多还原