中国癌症杂志 ›› 2016, Vol. 26 ›› Issue (10): 813-819.doi: 10.19401/j.cnki.1007-3639.2016.10.002

• 论著 • 上一篇    下一篇

miR-26a靶向MMP16参与调控胃癌细胞侵袭作用研究

陈治宇1,王辰辰1,胡 健2,赵晓莹1,李文桦1,朱晓东1   

  1. 1. 复旦大学附属肿瘤医院肿瘤内科,复旦大学上海医学院肿瘤学系,上海 200032 ;
    2. 中国人民解放军第四五五医院消化内科,上海 200052
  • 出版日期:2016-10-30 发布日期:2016-11-17
  • 通信作者: 陈治宇 E-mail: zychan75@163.com
  • 基金资助:
    上海市自然科学基金(16ZR1406800)。

miR-26a suppresses gastric cancer cell invasion by targeting MMP16

CHEN Zhiyu1, WANG Chenchen1, HU Jian2, ZHAO Xiaoying1, LI Wenhua1, ZHU Xiaodong1   

  1. 1.Department of Medical Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; 2.Department of Gastroenterology, the 455th Hospital of Chinese People's Liberation Army, Shanghai 200052, China
  • Published:2016-10-30 Online:2016-11-17
  • Contact: CHEN Zhiyu E-mail: zychan75@163.com

摘要: 背景与目的:胃癌发生侵袭转移是导致患者预后不良的重要因素。本研究旨在明确miR-26a在调控胃癌细胞运动侵袭中的作用及其可能机制。方法:通过实时荧光定量聚合酶链反应(real-time fluorescent quantitative polymerase chain reaction,RTFQ-PCR)检测胃癌组织细胞中miR-26a表达情况,体外通过CCK-8法、平板克隆形成实验和Matrigel-Transwell实验评价miR-26a对人胃癌细胞增殖、运动和侵袭能力的影响。荧光素酶报告基因系统评估miR-26a对下游靶基因的调控作用。结果:胃癌组织中miR-26a表达较癌旁组织明显下降。miR-26a体外对胃癌细胞增殖无明显影响,但可显著抑制胃癌细胞的运动和侵袭。相反,抑制miR-26a表达可促进胃癌细胞的侵袭能力。生物信息学分析提示,基质金属蛋白酶16(matrix metalloproteinase 16,MMP16)为miR-26直接调控靶基因,miR-26a可抑制胃癌细胞MMP16 miRNA和蛋白的表达。荧光素酶报告基因检测提示,miR-26a可与MMP16 mRNA 3’UTR结合诱导其转录后抑制。进一步研究提示,MMP16 siRNA对胃癌细胞侵袭具有模拟miR-26a作用,而过表达MMP16可拮抗miR-26a对胃癌细胞侵袭的影响。结论:miR-26a可通过靶向MMP16来抑制胃癌细胞运动侵袭,miR-26a可作为抑制胃癌细胞侵袭的重要干预靶点。

关键词: miR-26a, 胃癌, 基质金属蛋白酶16, 侵袭

Abstract: Background and purpose: Invasion and metastasis lead to poor prognosis in gastric cancer. In this study, we investigated the potential function of miR-26a in gastric cancer. Methods: Real-time fluorescent quantitative polymerase chain reaction (RTFQ-PCR) was used to detect the expression of miR-26a in gastric cancer cells. In vitro CCK-8 assay, cloning formation assay and Matrigel-Transwell assay were used to evaluate the proliferation, migration and invasion of gastric cancer cells. A luciferase reporter assay was also conducted to confirm that matrix metalloproteinase-16 (MMP16) is a direct target of miR-26a. Results: miR-26a was down-regulated in gastric cancer tissues compared with that in non-cancerous tissues. Functional studies showed that miR-26a inhibited cell proliferation, colony formation, cell motility and invasion. However, miR-26a had no effect on cell proliferation. We also characterized MMP16 as a direct target of miR-26a. We showed that knocking down MMP16 in gastric cancer cells significantly decreased MMP16 expression and inhibited cell invasion, whereas ectopic MMP16 expression significantly abrogated the suppressed cell invasion induced by miR-26a. Conclusion: miR-26a suppresses gastric cancer cell invasion by targeting MMP16. miR-26a could represent a potential therapeutic target for gastric cancer.

Key words: miR-26a, Gastric cancer, Matrix metalloproteinase-16, Invasion