胰腺癌中磷酸酶和张力蛋白同源物基因及B7-H1蛋白的表达及其临床意义

目的 观察胰腺癌磷酸酶和张力蛋白同源物基因(PTEN)蛋白和B7-H1蛋白的表达,探讨两者与胰腺癌肿瘤生物学特征的关系.方法 采用免疫组织化学ELPS法检测43例胰腺癌患者的组织标本和作为对照的5例非癌胰腺标本中PTEN和B7-H1蛋白的表达水平,分析其与临床和病理学特征的关系.结果 比较非癌胰腺组织,胰腺癌组织中PTEN蛋白表达显著降低,而B7-H1蛋白表达显著升高(P＜0.01),两者的表达还呈现显著负相关(r=-0.414,P＜0.01);两者的表达水平与肿瘤的分化程度、TNM分期、浆膜侵犯及淋巴结转移有关(P＜0.05),B7-H1表达水平还与年龄显著相关(P＜0.01);两者分别的表达水平与患者的预后均显著相关(P＜0.01),两者的联合表达水平与患者的预后相关(P＜0.05).结论 mN和B7-H1蛋白的表达水平与胰腺癌的发生、发展和预后密切相关.

Abstract：

Objective To investigate the probable correlation between the expressions of phosphatase and tensin homologue deleted on chromosometen (PTEN) and B7-H1 protein in pancreatic carcinoma and the biological behavior characteristics of tumors. Methods Forty-three patients were recruited who had undergone surgical resection for pancreatic carcinoma between 2002 and 2009. The PTEN and B7-H1 protein expressions in the tissue specimens of these 43 patients and 5 non-pancreatic carcinoma people' s pancreatic tissue specimens were evaluated by immunohistochemistry ELPS technique, and the clinical and pathological features of these specimens and the follow-up information were analyzed. Results PTEN expressions were significantly lower in pancreatic carcinoma tissues than in non-pancreatic carcinoma people' s pancreatic tissues but B7-H1 expressions were significantly higher ( P ＜ 0. 01 ). The expression of PTEN was negatively correlated to that of B7-H1 (r = -0.414 ,P ＜0. 01). PTEN and B7-H1 expressions correlated with the pathological grade and tumor-node-metastasis ( TNM ) stage, peripancreatic invasion, regional lymph node involvement,respectively (P＜0. 05). B7-H1 expressions also significantly correlated with the ages (P＜0. 01). Furthermore, PTEN and B7-H1 expressions showed significant prognostic effects (P＜0.01) and there are correlations existed between combined PTEN/B7-H1 expression and prognostic effects (P ＜0. 05). Conclusion The expression of PTEN and B7-H1 may be significantly correlated to the carcinogenesis,development and prognosis of pancreatic carcinoma.

Clinical significance of PTEN and B7-H1 expressions in pancreatic carcinoma

Objective To investigate the probable correlation between the expressions of phosphatase and tensin homologue deleted on chromosometen (PTEN) and B7-H1 protein in pancreatic carcinoma and the biological behavior characteristics of tumors. Methods Forty-three patients were recruited who had undergone surgical resection for pancreatic carcinoma between 2002 and 2009. The PTEN and B7-H1 protein expressions in the tissue specimens of these 43 patients and 5 non-pancreatic carcinoma people' s pancreatic tissue specimens were evaluated by immunohistochemistry ELPS technique, and the clinical and pathological features of these specimens and the follow-up information were analyzed. Results PTEN expressions were significantly lower in pancreatic carcinoma tissues than in non-pancreatic carcinoma people' s pancreatic tissues but B7-H1 expressions were significantly higher ( P ＜ 0. 01 ). The expression of PTEN was negatively correlated to that of B7-H1 (r = -0.414 ,P ＜0. 01). PTEN and B7-H1 expressions correlated with the pathological grade and tumor-node-metastasis ( TNM ) stage, peripancreatic invasion, regional lymph node involvement,respectively (P＜0. 05). B7-H1 expressions also significantly correlated with the ages (P＜0. 01). Furthermore, PTEN and B7-H1 expressions showed significant prognostic effects (P＜0.01) and there are correlations existed between combined PTEN/B7-H1 expression and prognostic effects (P ＜0. 05). Conclusion The expression of PTEN and B7-H1 may be significantly correlated to the carcinogenesis,development and prognosis of pancreatic carcinoma.