Adipose-derived mesenchymal stem cell-derived exosomes alleviate hydrogen peroxide-induced PC12 cell apoptosis

doi:10.12307/2024.165

Abstract

Abstract: BACKGROUND: Mesenchymal stem cell-derived exosomes may play a crucial role in tissue damage repair, and miRNA is an important component of exosomes for therapeutic effects. Among them, miR-29b-3p has the effect of reducing cell apoptosis, promoting axonal regeneration, and angiogenesis.
OBJECTIVE: To study the protective effect of adipose-derived mesenchymal stem cell-derived exosome via miR-29b-3p on a neural cell injury model simulated by H2O2-treated PC12 cells, and explore the relevant mechanisms.
METHODS: (1) First, the collagenase digestion method was used to extract rat adipose-derived mesenchymal stem cells. Adipose-derived mesenchymal stem cells were transfected with miR-29b-3p mimics and inhibitors. Exosomes were extracted from the culture supernatant by ultracentrifugation and identified so as to construct adipose-derived mesenchymal stem cell-derived exosomes with high expression and knockdown miR-29b-3p. (2) By constructing a neural cell injury model simulated by PC12 cells treated with H2O2, the relevant mechanisms of the protective effect of adipose-derived mesenchymal stem cell-derived exosome via miR-29b-3p on the simulated neuronal cell injury model were studied.
RESULTS AND CONCLUSION: (1) Adipose-derived mesenchymal stem cell-derived exosome had a typical cup-shaped shape and a diameter distribution in the range of 50-140 nm, expressed membrane proteins Alix, CD63, and TSG101, which were specific markers on the surface of exosomes, and could be successfully ingested by PC12 cells. (2) Adipose-derived mesenchymal stem cell-derived exosome pretreatment could reduce cell apoptosis induced by H2O2 treatment in PC12 cells, and this protective effect was enhanced with the increase of miR-29b-3p expression in the exosomes and weakened with the decrease of miR-29b-3p expression in the exosomes. The mechanism of its effect was related to adipose-derived mesenchymal stem cell-derived exosome via miR-29b-3p promoting the expression of anti-apoptotic protein Bcl-2 and inhibiting the expression of apoptotic protein Bax.

Key words: adipose-derived mesenchymal stem cell, exosome, miR-29b-3p, PC12 cell, apoptosis, miRNA

CLC Number:

Gu Chengxu, Zhang Naili, Meng Yongchun, Liu Qing, Guo Qixuan, Fu Li, Zhang Luping, Huang Fei. Adipose-derived mesenchymal stem cell-derived exosomes alleviate hydrogen peroxide-induced PC12 cell apoptosis[J]. Chinese Journal of Tissue Engineering Research, 2024, 28(19): 2988-2995.

Figures/Tables 6

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