This study examined the possible role of p120ctn in the pathogenesis and development of pan-creatic cancer.PANC-1 cells,a kind of human pancreatic carcinoma cell line,were cultured in this study.p120ctn was immunocytochemically detected in PANC-1 cells.The recombinant lentivirus vector was constructed to knock down the p120ctn expression of PANC-1 cells.Real-time quantitative PCR (RQ-PCR) and Western blotting were used to determine the expression of p120ctn and E-cadherin in PANC-1 cells after p120ctn knockdown.The adhesion,invasion and migration capacity of PANC-1 cells after p120ctn knockdown was detected by cell adhesion,invasion and migration assays.Cell growth was measured by the MTT method.Cell cycle and apoptosis were analyzed by fluorescence-activated cell sorting.The results showed that p120ctn knockdown led to significantly down-regulated E-cadherin and a reduced cell-to-cell adhesion ability in PANC-1 cells.shRNA-mediated knockdown of p120ctn reduced invasion and migration capacity of PANC-1 cells,inhibited cell growth,caused a significant decrease in the percentage of cells in G1,an increase in S,and promoted apoptosis of PANC-1 cells.It was concluded that p120ctn plays a pivotal role in the proliferation and metastasis of pancreatic carcinoma,suggesting that p120ctn is a novel target for pancreatic carcinoma treatment.
目的:了解胰腺癌组织中连环蛋白p120(p120ctn)及E-钙黏蛋白(E-cadherin)表达情况,分析它们与胰腺癌临床病理特征及预后的关系。方法:采用免疫组化技术检测53例胰腺癌及癌旁胰腺组织的p120ctn、E-cadherin和CD34表达情况,结合临床资料利用SPSS软件行统计学分析。结果:53例胰腺癌组织中,连环蛋白p120主要表现为胞膜表达减弱或消失,或细胞质表达,异常表达率为34/53(64.1%),显著高于癌旁胰腺组织(7/53),差异有统计学意义(P<0.05)。E-cadherin在胰腺癌中异常表达率为30/53(56.6%),高于癌旁组织(9/53),差异有统计学意义(P<0.05)。p120ctn的异常表达与E-cadherin异常表达呈正相关(r=0.457,P<0.05)。p120ctn异常表达组微血管密度(MVD)值明显高于正常表达组(49.29±6.86 vs 13.80±2.92,P<0.05)。p120ctn的异常表达与胰腺癌组织的分化程度、淋巴结转移及TNM分期呈明显相关(P<0.05)。p120ctn异常表达组患者中位生存时间[(12.9±2.5)个月]明显低于正常表达组[(25.0±5.7)个月](P<0.05)。结论:p120ctn在胰腺癌中存在异常表达,其异常表达不仅与E-cadherin、CD34表达有关,且与肿瘤分化程度、淋巴结转移及TNM分期密切相关,并影响患者的预后。p120ctn可能是潜在的评价胰腺癌预后的指标和治疗靶点。
