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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Genet. | doi: 10.3389/fgene.2018.00677

miR-144 promotes adipogenesis through releasing C/EBPα from Klf3 1 and CtBP2

 Linyuan Shen1*, Qiang Li2, Jinyong Wang3, Ye Zhao1, Lili Niu1, Lin Bai1, Surong Shuai1, Xuewei Li1, Shunhua Zhang1 and Li Zhu1
  • 1College of Animal Science and Technology, Sichuan Agricultural University, China
  • 2Sichuan Province General Station of Animal Husbandry, China
  • 3Chongqing Academy of Animal Science, China

MicroRNAs (miRNAs), a class of small non-coding RNAs that have been proved as novel and potent regulators of adipogenesis. A previous study found out that miR-144 was a biomarker of type 2 diabetes, but the role of miR-144 in regulating adipogenesis is still unclear. In the present study, the expression of miR-144 increased both in obese mice and during the 3T3-L1 differentiation process. Overexpression of miR-144 suppressed the expression of cell cycle regulatory factors and inhibited preadipocytes proliferation. Besides, overexpression of miR-144 accelerated lipid accumulation in adipocytes and positively regulated its adipogenesis, which also accompanied by increasing the expression of genes related to fatty acid synthesis and decreasing the expression of genes involved in fatty acid oxidation. Furthermore, luciferase activity assays indicated miR-144 directly targeted Klf3 and CtBP2. The process also was confirmed by the mRNA and protein expression of Klf3 and CtBP2 that were suppressed by miR-144. Furthermore, miR-144 targeting Klf3/CtBP2 would induce C/EBPα activity by releasing corepressors (Klf3 and CtBP2) from its promoter region. Moreover, we also observed miR-144 could promote adipogenesis in mice injected with miR-144 agomir through tail-vein injection. Taken together, these results support that miR-144 can facilitate adipogenesis both in vitro and in vivo, which implies that miR-144 could be a target for therapeutic intervention in obesity and metabolic syndrome in the future

Keywords: MiR-144, Adipocytes, proliferation, differentiation, KLF3, CtBP2

Received: 03 Sep 2018; Accepted: 06 Dec 2018.

Edited by:

Trygve Tollefsbol, University of Alabama at Birmingham, United States

Reviewed by:

Kwan Yeung Wong, The University of Hong Kong, Hong Kong
Melina M. Musri, Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC), Argentina  

Copyright: © 2018 Shen, Li, Wang, Zhao, Niu, Bai, Shuai, Li, Zhang and Zhu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Linyuan Shen, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, 611130, Sichuan Province, China, shenlinyuan0815@163.com