Journal
NEUROMOLECULAR MEDICINE
Volume 23, Issue 4, Pages 500-510Publisher
HUMANA PRESS INC
DOI: 10.1007/s12017-021-08650-6
Keywords
Ischemia-reperfusion (I/R); MiR-143-3p; FSTL1; Apoptosis
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The study found that miR-143-3p expression is significantly upregulated during cerebral I/R injury, and inhibition of miR-143-3p can protect against neurological deficits, reduce infarct volume, enhance cell viability, and decrease cell apoptosis. This protective effect may be achieved through regulating the expression of FSTL1 protein.
MicroRNA (miRNA) miR-143-3p has been reported to participate in the progression of myocardial ischemia/reperfusion (I/R) injury, but its function in cerebral I/R injury remains unclear. Mice were subjected to 60 min of cerebral ischemia followed by different times of reperfusion to construct an I/R injury model in vivo. Human neuroblastoma SH-SY5Y cells were treated with oxygen-glucose deprivation (OGD) for 2 h followed by different times of re-oxygenation to establish I/R injury model in vitro. Neurological deficit was assessed by a five-point score. Infarct volume was detected using 2, 3, 5-triphenyltetrazolium chloride (TTC) staining. The expression of miR-143-3p was evaluated by qRT-PCR. The expression levels of FSTL1, Bcl-2, Bax and cleaved caspase-3 proteins were detected by western blot. The relationship between miR-143-3p and FSTL1 was explored by luciferase reporter assay. Cell viability was measured by CCK-8 assay. Cell apoptosis was evaluated by TUNEL staining and flow cytometry. MiR-143-3p was significantly upregulated during cerebral I/R injury both in vivo and in vitro. Inhibition of miR-143-3p effectively reduced I/R-induced neurological deficit score and infarct volume in vivo, and enhanced cell viability, while decreased cell apoptosis and LDH release of OGD/R-treated SH-SY5Y cells in vitro. Meanwhile, inhibition of miR-143-3p obviously decreased the expression levels of Bax and cleaved caspase-3, while increased the expression levels of Bcl-2. In addition, these changes induced by miR-143-3p inhibition in vitro was effectively reversed by silencing of FSTL1. Our results demonstrated that inhibition of miR-143-3p protected against cerebral I/R injury through targeting FSTL1.
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