Neuronal Exosomes Secreted under Oxygen–Glucose Deprivation/Reperfusion Presenting Differentially Expressed miRNAs and Affecting Neuronal Survival and Neurite Outgrowth

Chien Sung Chiang, Ssu Ju Fu, Chia Lang Hsu, Chung Jiuan Jeng, Chih Yung Tang, Yi Shuian Huang, Sung Chun Tang*

*此作品的通信作者

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Ischemia/reperfusion is a key feature of acute ischemic stroke, which causes neuron dysfunction and death. Exosomes, small extracellular vesicles produced by most cell types, are implicated in the mediation of cellular interactions with their environment. Here, we investigated the contents and functions of exosomes from neurons under ischemic reperfusion injury. First, rat cortical primary neuronal cell cultures were placed in an oxygen- and glucose-deprived (OGD) medium, followed by reperfusion in a normoxic conditioned medium (OGD/R) to mimic ischemia/reperfusion in vitro. The neuron-derived exosomes were harvested from the conditioned medium under normoxia and OGD/R. Through next-generation sequencing, exosomal miRNA expression levels in normoxic and OGD/R condition were compared. Their functional activity in terms of neuron viability and quantitative analysis of neurite outgrowth were examined. The expression levels of 45 exosomal miRNAs were significantly different between normoxic and OGD/R conditions. Bioinformatics analysis of dysregulated exosomal miRNAs identified multiple pathways involved in cell survival and death processes and neuronal signaling. Moreover, treatment with exosomes from OGD/R to cultured cortical neurons significantly impaired neuronal cell viability and reduced neurite outgrowth in terms of the number of primary or total neurites as well as length of primary neurites, compared with exosomes from normoxic conditions. miRNA-packed exosomes released by neurons under OGD/R challenge may contribute to post ischemic neuronal injury and provide further understanding of the effect of stressed neurons on neighboring neuronal functions.

原文English
頁(從 - 到)404-415
頁數12
期刊NeuroMolecular Medicine
23
發行號3
DOIs
出版狀態Published - 9月 2021

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