首页> 中文期刊> 《临床肿瘤学杂志》 >miR-203下调Bmi-1基因对肺腺癌细胞侵袭转移的影响

miR-203下调Bmi-1基因对肺腺癌细胞侵袭转移的影响

         

摘要

Objective To investigate the expression of miR-203 in lung adenocarcinoma and analyze the relationship between miR-203 and migration and invasion of lung adenocarcinoma cells. The involved molecular mechanisms are also initially explored. Methods miR-203 was detected in lung tissues of 40 patients with lung adenocarcinoma by real time PCR. The expression of miR-203 was detected in lung adenocarcinoma cell lines H1650, A549, H1975, SPC-A-1 by real time PCR. The potential target gene of miR-203 was predicted by online bioinformatic softwares. Pre-miR-203 mimics, Bmi-1 gene and Bmi-1 siRNA were transfected into H1975 cell line by lipofectamine 2000. The Bmi-1 protein level was analyzed by Western blotting. The predicted miR-203 binding site in Bmi-1 3’-untranslated region( UTR) was validated by dual-luciferase reporter gene assay. The migration ability of H1975 cells was determined by Transwell assay. Results The relative expression of miR-203 in lung adenocarcinoma tissues was 0�065 ± 0�013. The expression level of miR-203 in the lymph node metastasis group was lower than those in the non-metastasis group. The relative expression of miR-203 in H1650, A549, H1975 and SPC-A-1 cell lines were 0�280 ± 0�102, 0�308 ± 0�168, 0�167 ± 0�073 and 0�287 ± 0�096, respectively. Bmi-1 was a potential target gene of miR-203 predicted by miRanda and TargetScan. The Bmi-1 protein level was remark-ably decreased in the pre-miR-203 mimics group. Dual-luciferase reporter gene assay validated the predicted miR-203 binding site of Bmi-1 3’ UTR. Overexpression of miR-203 significantly inhibited the migration and invasion of H1975 cells, whereas the cell migration and invasion ability could be restored by overexpression of Bmi-1. Conclusion miR-203 can suppress the migration of lung adenocar-cinoma cell line H1975 via down-regulating Bmi-1 expression. miR-203 might be a potential tumor metastasis suppressor miRNA.%目的:探讨miR-203在肺腺癌中的表达,并分析其与肺腺癌细胞侵袭转移的关系及其分子机制。方法实时定量PCR检测40例肺腺癌患者肿瘤组织中miR-203的相对表达水平及其与临床病理特征之间的关系;实时定量PCR检测H1650、A549、H1975、SPC-A-1肺腺癌细胞株中miR-203表达水平;生物信息学软件预测miR-203潜在的靶基因;脂质体2000介导miR-203模拟物、Bmi-1基因或Bmi-1 siRNA转染H1975细胞株;Western blotting检测Bmi-1蛋白水平;双荧光素酶报告基因验证miR-203是否作用于Bmi-1 mRNA的3’ UTR区预测靶位;Transwell小室侵袭实验检测H1975细胞株的侵袭转移能力。结果40例肺腺癌组织中miR-203的相对表达量为0�065±0�013;肺腺癌miR-203表达与淋巴结转移有关,而与其他临床病理参数均无关;miR-203在肺腺癌细胞株H1650、A549、H1975、SPC-A-1中的相对表达量分别为0�280±0�102、0�308±0�168、0�167±0�073和0�287±0�096。生物信息学软件预测Bmi-1是miR-203的潜在靶基因;过表达miR-203可明显降低Bmi-1蛋白表达水平;双荧光素酶报告基因检测证明miR-203可作用于Bmi-1基因mRNA的3’ UTR区预测靶位。过表达miR-203+Bmi-1 siRNA可显著抑制肺腺癌细胞株H1975的侵袭迁移能力;在miR-203过表达的H1975细胞株中同时过表达Bmi-1可恢复其侵袭能力。结论 miR-203可通过下调Bmi-1基因表达抑制H1975肺腺癌细胞株的侵袭转移,是一种潜在抑制转移的miRNA分子。

著录项

  • 来源
    《临床肿瘤学杂志》 |2014年第4期|289-293|共5页
  • 作者单位

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

    210009 南京 南京医科大学附属江苏省肿瘤医院胸外科;

    江苏省恶性肿瘤分子生物学及转化医学重点实验室;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 肺肿瘤;
  • 关键词

    miR-203; 肺肿瘤; Bmi-1; 转移; 侵袭;

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