MicroRNA-145 suppresses hepatocellular carcinoma by targeting IRS1 and its downstream Akt signaling - PubMed (original) (raw)

. 2014 Apr 18;446(4):1255-60.

doi: 10.1016/j.bbrc.2014.03.107. Epub 2014 Mar 29.

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MicroRNA-145 suppresses hepatocellular carcinoma by targeting IRS1 and its downstream Akt signaling

Yelin Wang et al. Biochem Biophys Res Commun. 2014.

Abstract

Accumulating evidences have proved that dysregulation of microRNAs (miRNAs) is involved in cancer initiation and progression. In this study, we showed that miRNA-145 level was significantly decreased in hepatocellular cancer (HCC) tissues and cell lines, and its low expression was inversely associated with the abundance of insulin receptor substrate 1 (IRS1), a key mediator in oncogenic insulin-like growth factor (IGF) signaling. We verified IRS1 as a direct target of miR-145 using Western blotting and luciferase reporter assay. Further, the restoration of miR-145 in HCC cell lines suppressed cancer cell growth, owing to down-regulated IRS1 expression and its downstream Akt/FOXO1 signaling. Our results demonstrated that miR-145 could inhibit HCC through targeting IRS1 and its downstream signaling, implicating the loss of miR-145 regulation may be a potential molecular mechanism causing aberrant oncogenic signaling in HCC.

Keywords: Akt; Forkhead box protein O1 (FOXO1); Hepatocellular carcinoma (HCC); Insulin receptor substrate 1 (IRS1); MicroRNA-145.

Copyright © 2014 Elsevier Inc. All rights reserved.

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