Overexpression of miR-217-5p protects against oxygen-glucose deprivation/reperfusion-induced neuronal injury via inhibition of PTEN

Human Cell
Zhongquan YiPinglei Pan

Abstract

Ischemic stroke is characterized by loss of brain function because of cerebral ischemia. Evidence has been shown that miR-217-5p is significantly downregulated in infarcted brain areas following focal cerebral ischemia. However, the role of miR-217-5p in ischemic stroke is still unclear. To mimic ischemia/reperfusion (I/R) injury conditions in vitro, SH-SY5Y cells were treated with oxygen-glucose deprivation/reperfusion (OGD/R). Our data found that PTEN was the directly target of miR-217-5p in SH-SY5Y cells. The level of miR-217-5p was significantly decreased, while the level of PTEN was notably increased in SH-SY5Y cells following OGD/R treatment. Overexpression of miR-217-5p markedly promoted the proliferation and cell cycle progression, and inhibited apoptosis in OGD/R-treated SH-SY5Y cells. In addition, overexpression of miR-217-5p significantly decreased the expressions of PTEN and FOXO1, but increased the expression of p-Akt in OGD/R-treated SH-SY5Y cells. Moreover, methylation specific PCR (MSP) results indicated the CpG islands in the promoter region of miR-217-5p were hypermethylated in SH-SY5Y cells under OGD/R. Meanwhile, the DNA methylation of miR-217-5p promoter region decreased expression of miR-217-5p. Our data i...Continue Reading

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Citations

Nov 10, 2020·Biomedicine & Pharmacotherapy = Biomédecine & Pharmacothérapie·Soudeh Ghafouri-FardMohammad Taheri
May 16, 2021·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Wenzhao WangWei Xie

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Methods Mentioned

BETA
PCR
flow cytometry
Protein Assay
electrophoresis
transfection

Software Mentioned

GraphPad Prism

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