MicroRNA‐30b functions as a tumour suppressor in human colorectal cancer by targeting KRAS, PIK3CD and BCL2. Issue 4 (March 2014)

• Record Type: Journal Article
• Authors: Liao, Wen‐Ting; Ye, Ya‐Ping; Zhang, Nian‐Jie; Li, Ting‐Ting; Wang, Shu‐Yang; Cui, Yan‐Mei; Qi, Lu; Wu, Ping; Jiao, Hong‐Li; Xie, Yi‐Jun; Zhang, Chi; Wang, Jun‐Xian; Ding, Yan‐Qing
• Is Part Of: Journal of pathology. Volume 232:Issue 4(2014)
• Page Start: 415
• Page End: 427
• Publication Date: 2014-03
• Subjects: Pathology -- Periodicals; 616.07
• DOI: 10.1002/path.4309
• Languages: English
• ISSNs: 0022-3417

Abstract

<abstract abstract-type="main" id="path4309-abs-0001"> <title>Abstract</title> <p id="path4309-para-0001"> <bold>Colorectal cancer (CRC) is the third most common cancer in the USA. MicroRNAs play important roles in the pathogenesis of CRC. In this study, we investigated the role of miR‐30b in CRC and found that its expression was significantly lower in CRC tissues than that in normal tissues. We showed that a low expression level of miR‐30b was closely related to poor differentiation, advanced TNM stage and poor prognosis of CRC. Further experiments showed that over‐expression of miR‐30b suppressed CRC cell proliferation <italic>in vitro</italic> and tumour growth <italic>in vivo</italic>. Specifically, miR‐30b promoted G<sub>1</sub> arrest and induced apoptosis. Moreover, <italic>KRAS</italic>, <italic>PIK3CD</italic> and <italic>BCL2</italic> were identified as direct and functional targets of miR‐30b. MiR‐30b directly targeted the 3′‐untranslated regions of their mRNAs and repressed their expression. This study revealed functional and mechanistic links between miRNA‐30b and oncogene KRAS, PIK3CD and BCL2 in the pathogenesis of CRC. MiR‐30b not only plays important roles in the regulation of cell proliferation and tumour growth in CRC, but is also a potential prognostic marker or therapeutic target for CRC. Restoration of miR‐30b expression may represent a promising therapeutic approach for targeting malignant CRC. Copyright © 2013 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.</bold> </p> </abstract>