MUC15和PI3K/Akt 表达与胃癌临床病理特征及预后的相关性研究

目的:探讨MUC15 和PI 3K/Akt的表达与胃癌临床病理特征和预后的关系。方法:采用组织芯片和免疫组织化学法检测144 例胃癌组织及对应癌旁组织中MUC15、Akt的表达。结果:MUC15在胃癌中阳性表达率为79.8% ，高于癌旁组织中的阳性表达率22.2%（P < 0.01）；Akt在胃癌中阳性表达率为80.6% ，高于癌旁组织的阳性表达率16.7%（P < 0.01）。 MUC15和Akt表达均与胃癌分化程度、浸润深度、有无淋巴结转移和TNM 分期相关（P < 0.05）；且胃癌组织中MUC15表达和Akt表达呈正相关（P = 0.001）。 单因素生存分析显示，MUC15和Akt高表达均与生存时间呈负相关（P < 0.05）。 Cox 多元回归分析提示，MUC15和Akt同时阳性的胃癌患者预后更差（HR= 3.115，P < 0.05）。 结论:MUC15可能通过PI 3K/Akt细胞信号转导通路参与胃癌的发生、发展、浸润转移，MUC15结合Akt是胃癌预后强有力的预测因子。 

Expression of MUC15 and PI3K/Akt in gastric carcinoma and its association with clini-copathological characteristics and prognosis

Objective:To analyze the expression of MUC15 and PI3K/Akt in gastric carcinoma and its association with clinicopathologi-cal characteristics and prognosis. Methods:The expression of MUC15 and Akt was detected in 144 cases of gastric carcinoma tissues and corresponding para-carcinoma tissues by tissue microarray and immunohistochemistry. Results:The positive expression rate of MUC15 in gastric carcinoma was 79.8%, higher than that of para-carcinoma tissues (22.2%, P<0.01). The positive expression rate of Akt protein in gastric carcinoma was 80.6%, higher than that of para-carcinoma tissues (16.7%, P<0.01). The expression of MUC15 and Akt was statistically associated with the grades of differentiation, invasion depth, lymphatic metastasis, TNM stage of tumor tissues (P<0.05), and the positive correlation between the two protein expression that appear in the gastric tumor tissue (P=0.001). Univariate survival analysis showed that the over-expression of either MUC15 or Akt was inversely correlated with the survival time (P<0.05 and P<0.01, respectively). Cox multiple regression analysis indicated that patients with over-expression of both MUC15 and Akt had the worst prognoses (HR=3.115, P<0.05). Conclusion:MUC15 may be involved in the occurrence, development, invasion, and metastasis of gastric cancer through the PI3K/Akt cell signaling pathway, and the expression of MUC15 combined with Akt is a powerful predictor for the prognosis of gastric cancer.