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miR-96通过靶向胰腺癌中的NUAK1发挥肿瘤抑制基因的作用。

miR‑96 functions as a tumor suppressor gene by targeting NUAK1 in pancreatic cancer.

作者信息

Huang Xuan, Lv Wei, Zhang Jian-Hua, Lu Da-Lin

机构信息

Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan, Hubei 430081, P.R. China.

Department of Hepatobiliary Surgery, The Second Artillery General Hospital of PLA, Beijing 100088, P.R. China.

出版信息

Int J Mol Med. 2014 Dec;34(6):1599-605. doi: 10.3892/ijmm.2014.1940. Epub 2014 Sep 19.

Abstract

microRNA-96 (miR-96) is known to be downregulated in pancreatic cancer. The overexpression of miR-96 in MIA PaCa-2 pancreatic cancer cells has been shown to inhibit cell proliferation, migration and invasion; however, the mechanisms involved have not yet been fully elucidated. Novel (nua) kinase family 1 (NUAK1) functions as an oncogene in non‑small cell lung cancer (NSCLC), melanoma, glioma, breast cancer, hepatocellular carcinoma and pancreatic cancer. In this study, firstly, we demonstrate that NUAK1 expression is specifically upregulated in pancreatic cancer and that it promotes the proliferation, migration and invasion of MIA PaCa-2 pancreatic cancer cells. Secondly, we performed an analysis of potential microRNA (miRNA) target sites using three commonly used prediction algorithms: miRanda, TargetScan and PicTar. All three algorithms predicted that miR-96 targets the 3' untranslated region (3' UTR) of NUAK1. Further experiments confirmed this prediction, namely that miR-96 suppresses the expression of NUAK1 by targeting its 3' UTR. Finally, we demonstrate that the introduction of NUAK1 cDNA lacking predicted sites of the 3' UTR abrogates miR-96 cellular function.

摘要

已知微小RNA-96(miR-96)在胰腺癌中表达下调。在MIA PaCa-2胰腺癌细胞中过表达miR-96已显示出可抑制细胞增殖、迁移和侵袭;然而,其中涉及的机制尚未完全阐明。新型(nua)激酶家族1(NUAK1)在非小细胞肺癌(NSCLC)、黑色素瘤、神经胶质瘤、乳腺癌、肝细胞癌和胰腺癌中作为癌基因发挥作用。在本研究中,首先,我们证明NUAK1在胰腺癌中特异性上调,并且它促进MIA PaCa-2胰腺癌细胞的增殖、迁移和侵袭。其次,我们使用三种常用的预测算法:miRanda、TargetScan和PicTar对潜在的微小RNA(miRNA)靶位点进行了分析。所有这三种算法均预测miR-96靶向NUAK1的3'非翻译区(3'UTR)。进一步的实验证实了这一预测,即miR-96通过靶向其3'UTR抑制NUAK1的表达。最后,我们证明引入缺乏3'UTR预测位点的NUAK1 cDNA可消除miR-96的细胞功能。

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