基础医学与临床 ›› 2016, Vol. 36 ›› Issue (6): 777-782.

• 研究论文 • 上一篇    下一篇

miR-320e促进胰腺癌细胞系耐药

刘晓玲1,司艳敏1,赵华路2,马艳妮3   

  1. 1. 中国医学科学院基础医学研究所
    2. 中国医学科学院基础医学研究所北京协和医学院基础学院
    3. 中国医学科学院 基础医学研究院 北京协和医学院 基础学院 医学分子生物学国家重点实验室
  • 收稿日期:2016-03-30 修回日期:2016-04-20 出版日期:2016-06-05 发布日期:2016-05-27
  • 通讯作者: 马艳妮 E-mail:yanni_ma@126.com
  • 基金资助:
    国家自然科学基金

miR-320e promotes drug resistance of pancreatic cancer cell line

  • Received:2016-03-30 Revised:2016-04-20 Online:2016-06-05 Published:2016-05-27
  • Supported by:
    the National Natural Science Foundation of China

摘要: 目的 研究miR-320e在胰腺癌耐药中的作用及其机制。方法 用定量PCR的方法确定miR-320e在胰腺癌耐药细胞株中的表达,进而通过在胰腺癌细胞中过表达miR-320e,检测细胞对5-FU化疗药物敏感性、细胞增殖。同时通过报告基因实验及Western blot法确定miR-320e的靶基因。结果 在胰腺癌耐药细胞株(PATU8988/5-Fu)中miR-320e表达显著上升(p<0.01)。在胰腺癌细胞PATU8988和PANC-1中过表达miR-320e后,细胞对5-FU化疗药物出现耐受,IC50显著上升(p<0.01),细胞增殖速度加快(p<0.01)。PDCD4是miR-320e的直接靶基因,miR-320e的过表达显著降低了PDCD4蛋白水平。结论 miR-320e的高表达可显著促发胰腺癌细胞化疗耐药,可作为胰腺癌耐药检测的分子标志及新的治疗靶点。

关键词: miR-320e, 胰腺癌, 耐药

Abstract: Objective To study the function and mechanism of miR-320e in drug-resistance of pancreatic cancer. Methods Q-PCR was used to detect the expression of miR-320e in 5-Fu resistant pancreatic cancer cells. MiR-320e was overexpressed in PATU8988 and PANC-1 pancreatic cancer cells and then drug sensitivity and cell proliferation were checked. In addition, luciferase reporter assay and Western blot were employed to identify the target of miR-320e. Results miR-320e was significantly up-regulated in the 5-Fu resistant PATU8988 cells. The overexpression of miR-320e in pancreatic cancer cells strongly promoted cell survival when treated with 5-Fu, and also advanced cell proliferation rate. miR-320e also decreased the protein level of PDCD4 and PDCD4 3′UTR dependent luciferase activity. miR-320e promoted drug-resistance by targeting PDCD4. Conclusions miR-320e can induce 5-Fu resistance of pancreatic cancer cells and might be developed as new drug-resistance marker and therapeutic target for pancreatic cancer.

Key words: miR-320e, pancreatic cancer, drug-resistance

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