Dynamic release of neuronal extracellular vesicles containing miR-21a-5p is induced by hypoxia.
biomarkers
extracellular vesicle
hypoxia
ischemic stroke
miR-21a-5p
neuron
Journal
Journal of extracellular vesicles
ISSN: 2001-3078
Titre abrégé: J Extracell Vesicles
Pays: United States
ID NLM: 101610479
Informations de publication
Date de publication:
01 2023
01 2023
Historique:
entrez:
3
1
2023
pubmed:
4
1
2023
medline:
6
1
2023
Statut:
ppublish
Résumé
Hypoxia induces changes in the secretion of extracellular vesicles (EVs) in several non-neuronal cells and pathological conditions. EVs are packed with biomolecules, such as microRNA(miR)-21-5p, which respond to hypoxia. However, the true EV association of miR-21-5p, and its functional or biomarker relevance, are inadequately characterised. Neurons are extremely sensitive cells, and it is not known whether the secretion of neuronal EVs and miR-21-5p are altered upon hypoxia. Here, we characterised the temporal EV secretion profile and cell viability of neurons under hypoxia. Hypoxia induced a rapid increase of miR-21a-5p secretion in the EVs, which preceded the elevation of hypoxia-induced tissue or cellular miR-21a-5p. Prolonged hypoxia induced cell death and the release of morphologically distinct EVs. The EVs protected miR-21a-5p from enzymatic degradation but a remarkable fraction of miR-21a-5p remained fragile and non-EV associated. The increase in miR-21a-5p secretion may have biomarker potential, as high blood levels of miR-21-5p in stroke patients were associated with significant disability at hospital discharge. Our data provides an understanding of the dynamic regulation of EV secretion from neurons under hypoxia and provides a candidate for the prediction of recovery from ischemic stroke.
Identifiants
pubmed: 36594832
doi: 10.1002/jev2.12297
pmc: PMC9809533
doi:
Substances chimiques
MicroRNAs
0
Biomarkers
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e12297Informations de copyright
© 2022 The Authors. Journal of Extracellular Vesicles published by Wiley Periodicals, LLC on behalf of the International Society for Extracellular Vesicles.
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