MicroRNA-18a Prevents Senescence of Mesenchymal Stem Cells by Targeting CTDSPL

Overview

Journal Aging (Albany NY)

Specialty Geriatrics

Date 2024 Mar 9

PMID 38460957

Authors

Bo Sun

Xian-Hui Meng

Yu-Min Li

Hao Lin

Zhong-Dang Xiao

Affiliations

Soon will be listed here.

Abstract

Stem cell therapy requires massive-scale homogeneous stem cells under strict qualification control. However, Prolonged expansion impairs the biological functions and results in senescence of mesenchymal stem cells (MSCs). We investigated the function of CTDSPL in the premature senescence process of MSCs and clarified that miR-18a-5p played a prominent role in preventing senescence of long-term cultured MSCs and promoting the self-renewal ability of MSCs. Over-expression of CTDSPL resulted in an enlarged morphology, up-regulation of p16 and accumulation of SA-β-gal of MSCs. The reduced phosphorylated RB suggested cell cycle arrest of MSCs. All these results implied that CTDSPL induced premature senescence of MSCs. We further demonstrated that miR-18a-5p was a putative regulator of CTDSPL by luciferase reporter assay. Inhibition of miR-18a-5p promoted the expression of CTDSPL and induced premature senescence of MSCs. Continuous overexpression of miR-18a-5p improved self-renewal of MSCs by reducing ROS level, increased expression of Oct4 and Nanog, and promoted growth rate and differentiation capability. We reported for the first time that the dynamic interaction of miR-18a-5p and CTDSPL is crucial for stem cell senescence.

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