Protective role of microRNA-27a upregulation and HSP90 silencing against cerebral ischemia-reperfusion injury in rats by activating PI3K/AKT/mTOR signaling pathway.


Journal

International immunopharmacology
ISSN: 1878-1705
Titre abrégé: Int Immunopharmacol
Pays: Netherlands
ID NLM: 100965259

Informations de publication

Date de publication:
Sep 2020
Historique:
received: 25 09 2019
revised: 12 05 2020
accepted: 22 05 2020
pubmed: 8 7 2020
medline: 29 5 2021
entrez: 8 7 2020
Statut: ppublish

Résumé

MicroRNAs (miRNAs) have been reported in cerebral ischemia-reperfusion injury, yet the function of miR-27a in it has seldom been mentioned. This study aims to assess the mechanisms of miR-27a in rats with cerebral ischemia-reperfusion injury. The cerebral ischemia-reperfusion models of rat pups were established by bilateral carotid artery occlusion. Rats were treated with miR-27a agomir, silenced HSP90 expression plasmids or PI3K/AKT/mTOR pathway agonist. Oxidative stress indices, inflammatory factors, brain tissue water content, cerebral infarct volume, neurological function score and neuronal apoptosis in rats with cerebral ischemia-reperfusion injury were measured. MiR-27a and HSP90 expression and PI3K/AKT/mTOR phosphorylation levels in the brain tissues of rats were also detected. MiR-27a expression and PI3K/AKT/mTOR phosphorylation levels were downregulated while HSP90 expression was upregulated in cerebral ischemia-reperfusion injury rats. Elevated miR-27a or reduced HSP90 diminished water content, neuronal apoptosis and infarct volume, suppressed oxidative stress and inflammatory response, as well as improved neurological deficits and pathological damages. Moreover, elevated miR-27a or silenced HSP90 upregulated PI3K/AKT/mTOR phosphorylation levels in cerebral ischemia-reperfusion injury rats. HSP90 silencing or PI3K/AKT/mTOR pathway agonist reversed the unfavorable effects of low miR-27a expression on cerebral ischemia-reperfusion injury rats. To conclude, our study demonstrates that elevated miR-27a or decreased HSP90 attenuates oxidative stress and inflammatory response, and improves neurological function in cerebral ischemia-reperfusion injury rats by activating PI3K/AKT/mTOR signaling pathway.

Identifiants

pubmed: 32634698
pii: S1567-5769(19)32132-0
doi: 10.1016/j.intimp.2020.106635
pii:
doi:

Substances chimiques

Cytokines 0
HSP90 Heat-Shock Proteins 0
MIRN27 microRNA, rat 0
MicroRNAs 0
Malondialdehyde 4Y8F71G49Q
Superoxide Dismutase EC 1.15.1.1
mTOR protein, rat EC 2.7.1.1
Proto-Oncogene Proteins c-akt EC 2.7.11.1
TOR Serine-Threonine Kinases EC 2.7.11.1
Glutathione GAN16C9B8O

Types de publication

Journal Article Retracted Publication

Langues

eng

Sous-ensembles de citation

IM

Pagination

106635

Commentaires et corrections

Type : RetractionIn

Informations de copyright

Copyright © 2020 Elsevier B.V. All rights reserved.

Déclaration de conflit d'intérêts

Declaration of Competing Interest The authors declare that they have no conflicts of interest.

Auteurs

Ensheng Zhang (E)

Department of Pediatrics, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China; Department of Pediatrics, Maternal and Child Health Care Hospital of Shandong Province, Cheeloo College of Medicine, Jinan 250014, Shandong, China.

Qian Chen (Q)

Department of Pediatrics, Maternal and Child Health Care Hospital of Shandong Province, Cheeloo College of Medicine, Jinan 250014, Shandong, China.

Jing Wang (J)

Department of Urology, First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, China.

Dong Li (D)

Department of Pediatrics, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China.

Zhenxia Wan (Z)

Department of Pediatrics, Maternal and Child Health Care Hospital of Shandong Province, Cheeloo College of Medicine, Jinan 250014, Shandong, China.

Xiuli Ju (X)

Department of Pediatrics, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, China. Electronic address: juxiuli0921@163.com.

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Classifications MeSH