microRNA-219-2-3p在胃癌中的表达及其作用机制初探  

The role of microRNA-219-2-3p in Gastric Cancer and the underlying mechanism

作　　者：金锦莲[1,2] 吴发明[1,2] 周海燕[1,2] 谢晓晶[1,2] 王新宇[1,2] 

机构地区：[1]三峡大学第三临床医学院 [2]葛洲坝中心医院消化内科,湖北宜昌443002

出　　处：《重庆医学》2014年第14期1729-1731,共3页Chongqing medicine

摘　　要：目的探讨microRNA-219-2-3p(miR-219-2-3p)与胃癌的相关性及机制。方法运用实时聚合酶链反应(real timeRT PCR)检测82份配对的胃癌组织和周围正常组织样本中的miR-219-2-3p的表达水平。在胃癌细胞株MGC803中过表达miR-219-2-3p后,测定细胞增殖活性,并在细胞株和胃癌组织标本中采用蛋白免疫印迹法(Western blot)测定与肿瘤增殖相关的蛋白ERK1/2表达水平。结果 miR-219-2-3p在晚期胃癌组织中的表达量下降,差异有统计学意义(P<0.05)。在胃癌细胞株MGC803中过表达miR-219-2-3p后细胞增殖受显著抑制(P<0.05)。过表达miR-219-2-3p后,MGC803细胞中的ERK磷酸化水平显著下降,总ERK表达量不变。在组织标本中,胃癌组织的ERK磷酸化(p-ERK)水平明显高于周围癌旁组织。结论 miR-219-2-3p可能通过参与调控ERK1/2信号通路而在胃癌发生和发展中起抑癌基因的作用。Objective To evaluate the role of miR219‐2‐3p in gastric cancer and the underlying mechanisms .Methods Real time RT‐PCR was employed to quantify the expression level of miR219‐2‐3p in matched tissues of 82 patients .In vitro cell proliferation , the expression of tumorgenesis related protein ERK1/2 was performed by overexpressing miR‐219‐2‐3p in gastric cancer cell line MGC803 .Results The expression level of miR‐219‐2‐3p significantly decreased in late stage gastric cancer （P〈 0 .05） .The cell proliferation rate was significantly reduced in gastric cancer cell lines overexpressing miR‐219‐2‐3p .Furthermore ,the expression level of p‐ERK that activated form of ERK was significantly decreased whereas the total level of ERK was unchanged after overex‐pressing of miR‐219‐2‐3p in MGC803 cell lines .The expression level of p‐ERK was also increased in gastric cancer tissues .Conclu‐sion miR‐219‐2‐3p may acts as a tumor suppressor in gastric cancer by decreasing the activity of ERK 1/2 signaling pathway .

关 键 词：胃肿瘤 microRNA-219-2-3p 细胞分裂 

分 类 号：R735.2[医药卫生—肿瘤]