miR-491-5p inhibits Emilin 1 to promote fibroblasts proliferation and fibrosis in gluteal muscle contracture via TGF-β1/Smad2 pathway

Title:

miR-491-5p inhibits Emilin 1 to promote fibroblasts proliferation and fibrosis in gluteal muscle contracture via TGF-β1/Smad2 pathway

Creator:

Chen, Shuai, Wu, Qiuwan, Wang, Yang, Xu, Jie, Wang, Ye, and Luo, Xianyang

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:4c07ff85-e2cd-4002-a8f1-4fdde01f0a86
uuid:4c07ff85-e2cd-4002-a8f1-4fdde01f0a86
doi:10.33549/physiolres.934804

Subject:

gluteal muscle contracture, MiR-491-5p, Emilin 1, and fibroblasts

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

Gluteal muscle contracture (GMC) is a chronic fibrotic disease of gluteal muscles due to multiple etiologies. Emilin 1 plays a determinant role in fibers formation, but its role in the progression of GMC remains unclear. The present study was aimed to search for the predictive role and regulatory mechanism of Emilin 1 on GMC. Here, Protein and mRNA expression of Emilin 1 were decreased in GMC tissues compared to normal muscle tissues. Using the analysis of target prediction, Emilin 1 was observed to be a potential downstream sponge of miR-491-5p. In comparison to Emilin 1, miR-491-5p showed an aberrant elevation in GMC tissues, which was further proven to have a negative correlation with Emilin 1. The direct binding of miR-491-5p to Emilin 1 mRNA was confirmed by luciferase reporter gene assay, and miR-491-5p mimics inhibited, while miR-491-5p inhibitor promoted the protein expression and secretion of Emilin 1 in contraction bands (CB) fibroblasts. Additionally, miR-491-5p mimics promoted the expression of cyclin-dependent kinase 2 and cyclin D1 and the proliferation of CB fibroblasts, which could be reversed by Emilin 1 overexpression. Mechanistically, miR-491-5p mimics possibly activated transforming growth factor β1 (TGF-β1)/Smad3 signal cascade via binding to 3’-untranslated region of Emilin 1 mRNA, thereby promoting the progression of fibrosis of CB fibroblasts. Collectively, miR-491-5p inhibited Emilin 1 expression, and subsequently promoted CB fibroblasts proliferation and fibrosis via activating TGF-β1/Smad3 signal axis. MiR-491-5p might be a potentially effective biomarker for predicting GMC, providing a novel therapeutic strategy for GMC.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

219-231

Source:

Physiological research | 2022 Volume:71 | Number:2

Harvested from:

CDK

Metadata only:

false