Research Paper|Volume 12, Issue 7|pp 5625—5639

LncRNA 2310043L19Rik inhibits differentiation and promotes proliferation of myoblast by sponging miR-125a-5p

Rongyang Li¹, Bojiang Li², Ming Shen¹, Yan Cao¹, Xuan Zhang¹, Weijian Li¹, Jingli Tao¹, Wangjun Wu¹, Honglin Liu¹

¹Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
²College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China

Received: October 29, 2019Accepted: January 27, 2020Published: March 31, 2020

Copyright © 2020 Li et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Although many long non-coding RNAs (lncRNAs) have been identified in muscle, some of their physiological functions and regulatory mechanisms remain elusive. Here we report the functional identification and characterization of a novel lncRNA 2310043L19Rik (lnc-231), which is highly expressed in muscle. The expression level of lnc-231 in skeletal muscle of young mice is higher than that in aged mice. Functional analysis showed that overexpression of lnc-231 restrained differentiation and promoted proliferation of myoblast, while inhibition of lnc-231 revealed completely opposite effects in vitro. RNA molecules of lnc-231 acted mechanistically as competing endogenous RNAs (ceRNA) to target miR-125a-5p, whereas miR-125a-5p binds to the 3’-UTR of E2F3 mRNA to inhibit its function. Collectively, lncRNA 2310043L19Rik promotes proliferation and inhibits differentiation of myoblast cells by attenuating the function of miR-125a-5p.