4.5 Article

MiR-101 Protects Against the Cerebral I/R Injury Through Regulating JAK2/STAT3 Signaling Pathway

Journal

NEUROPSYCHIATRIC DISEASE AND TREATMENT
Volume 17, Issue -, Pages 2791-2802

Publisher

DOVE MEDICAL PRESS LTD
DOI: 10.2147/NDT.S292471

Keywords

ischemic stroke; miR-101; JAK2; STAT3 signaling

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The study demonstrated that miR-101 can protect neuronal cells from apoptosis and ischemic brain injury by regulating the JAK2/STAT3 signaling pathway, suggesting that miR-101 might be a potential target for the treatment of ischemic stroke.
Background: Ischemic stroke is a devastating disease with very limited therapeutics. Although miR-101 has been reported to play crucial roles in various human diseases, its role in ischemic stroke remains unclear. Methods: Ischemia-reperfusion (I/R) injury neuronal cells and rat model with I/R injury were constructed. Viability and apoptosis of I/R model cells with miR-101 overexpression or downregulation were evaluated. Potential targets of miR-101 were predicted using miRNA database microRNA.org and confirmed using luciferase reporter assays. Meanwhile, JAK2 and p-STAT3 protein levels were evaluated by Western blot. In addition, rescue experiments (silencing of JAK2) were applied to determine the role of miR-101 in cerebral I/R injury. Results: MiR-101 was significantly downregulated in OGD/R-induced neuronal cells and brain tissues with I/R injury. MiR-101 overexpression (miR-101 mimics) significantly promoted viability and inhibited apoptosis of OGD/R-induced neuronal cells in vitro and efficiently protected rats from ischemic brain injury in vivo. By contrast, miR-101 inhibitor exacerbated growth defect, apoptosis, and ischemic brain injury. Luciferase reporter assay indicated that JAK2 was a direct target of mIR-101, and JAK2 silencing effectively reversed the miR-101 inhibitor-induced neuronal cell apoptosis in vitro and reduced cerebral infarction volume in vivo. Conclusion: Our study demonstrated that miR-101 efficiently protected neuronal cells from apoptosis and ischemic brain injury through regulating the JAK2/STAT3 signaling pathway, suggesting that miR-101 might be a potential target for treatment of ischemic stroke.

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