Postmitotic Expression of SOD1(G93A) Gene Affects the Identity of Myogenic Cells and Inhibits Myoblasts Differentiation.

Abstract:

:To determine the role of mutant SOD1 gene (SOD1(G93A)) on muscle cell differentiation, we derived C2C12 muscle cell lines carrying a stably transfected SOD1(G93A) gene under the control of a myosin light chain (MLC) promoter-enhancer cassette. Expression of MLC/SOD1(G93A) in C2C12 cells resulted in dramatic inhibition of myoblast differentiation. Transfected SOD1(G93A) gene expression in postmitotic skeletal myocytes downregulated the expression of relevant markers of committed and differentiated myoblasts such as MyoD, Myogenin, MRF4, and the muscle specific miRNA expression. The inhibitory effects of SOD1(G93A) gene on myogenic program perturbed Akt/p70 and MAPK signaling pathways which promote differentiation cascade. Of note, the inhibition of the myogenic program, by transfected SOD1(G93A) gene expression, impinged also the identity of myogenic cells. Expression of MLC/SOD1(G93A) in C2C12 myogenic cells promoted a fibro-adipogenic progenitors (FAPs) phenotype, upregulating HDAC4 protein and preventing the myogenic commitment complex BAF60C-SWI/SNF. We thus identified potential molecular mediators of the inhibitory effects of SOD1(G93A) on myogenic program and disclosed potential signaling, activated by SOD1(G93A), that affect the identity of the myogenic cell population.

journal_name

Mediators Inflamm

authors

Martini M,Dobrowolny G,Aucello M,Musarò A

doi

10.1155/2015/537853

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

537853

eissn

0962-9351

issn

1466-1861

journal_volume

2015

pub_type

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