MiR-431 Inhibits Adipogenic Differentiation of Human Bone Marrow-derived Mesenchymal Stem Cells Via Targeting Insulin Receptor Substance 2

Overview

Journal Stem Cell Res Ther

Publisher Biomed Central

Date 2018 Sep 1

PMID 30165902

Citations 12

Authors

Yangling Wang

Lei Yang

Xiaofeng Liu

Tao Hong

Tao Wang

Aiwu Dong

Jiangxiong Li

Xiaoyuan Xu

Lingling Cao

Affiliations

Soon will be listed here.

Abstract

Background: An understanding of the mechanism underlying adipogenic differentiation of human bone marrow-derived mesenchymal stem cells (hMSCs) will provide new therapeutic approaches for many diseases, including osteoporosis. This study aimed to investigate the role of miR-431 in adipogenic differentiation of hMSCs.

Methods: hMSCs were induced for adipogenic differentiation and miR-431 was detected by polymerase chain reaction (PCR). hMSCs were transfected by miR-431 or small interfering RNA (siRNA) for insulin receptor substance 2 (IRS2). The expression of IRS2 was detected by PCR and Western blot analysis. The targeting of the 3'-untranslated region (UTR) of IRS2 by miR-431 was examined by luciferase assay.

Results: miR-431 expression was decreased during adipogenesis of hMSCs. Overexpression of miR-431 inhibited adipogenic differentiation, accompanied by the downregulation of CCAAT/enhancer binding protein α (C/EBPα) and peroxisome proliferator-activated receptor γ (PPARγ), two key regulators of adipogenesis. Moreover, miR-431 decreased both protein and mRNA levels of IRS2. The expression of IRS2 was increased during adipogenic differentiation of hMSCs in conjunction with decreased levels of miR-431, and knockdown of IRS2 in hMSCs inhibited adipogenic differentiation. Luciferase assay confirmed that miR-431 targeted the 3'-UTR of IRS2 in hMSCs.

Conclusions: This is the first study to show that miR-431 inhibits adipogenic differentiation of hMSCs via targeting IRS2.

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