MSC-sEVs exacerbate senescence by transferring bisecting GlcNAcylated GPNMB.

Yihan Ma, Chongfu Zhao, Jingjing Feng, Junjie Gou, Enci Kang, Feng Guan, Qiong Wu, Xiang Li

Key Laboratory of Resource Biology and Biotechnology in Western China, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Ministry of Education, Northwest University, Xi'an, China. · pubmed

Paper

Abstract

The senescence of bone marrow mesenchymal stem cells (BMMSCs) is increasingly recognized as a critical factor contributing to the pathophysiology of age-related diseases. Recent studies suggest that small extracellular vesicles (sEVs) derived from the serum of elderly individuals may play a pivotal role in promoting BMMSC senescence. Glycoprotein non-metastatic melanoma protein B (GPNMB), a type I transmembrane glycoprotein, is upregulated during cellular senescence and can regulate stem cell ageing. However, the precise mechanisms by which GPNMB influences BMMSCs senescence remain poorly understood. Understanding this relationship could provide valuable insights into therapeutic strategies for enhancing BMMSCs function and mitigating age-related degeneration.

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Research summary

The paper claims that MSC-sEVs exacerbate senescence by transferring bisecting GlcNAcylated GPNMB. This research is relevant as it explores the mechanisms of BMMSC senescence, which is a critical factor in the aging process and age-related diseases, potentially offering insights into therapeutic strategies for enhancing stem cell function.

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