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• W2894820514 abstract "Cerebral ischemia-reperfusion-induced microglial activation causes neuronal death through the release of inflammatory cytokines. Increasing evidence suggests that microRNAs (miRNAs) exert a neuroprotective effect by modulating the inflammatory process in cerebral ischemia-reperfusion injury. Furthermore, Toll-like receptor 4 (TLR4) is increasingly being considered to have a significant role in the regulation of inflammation. However, whether miRNAs mediate their neuroprotective effects by regulating TLR4-mediated inflammatory responses remains unknown. To explore this gap in the literature, we conducted both in vitro and in vivo experiments. In vitro: BV2 cells were activated by oxygen-glucose deprivation (OGD). TLR4 and inflammatory cytokine (TNF-a, IL-6, and IL-1β) transcription and translation expression levels were assessed using RT-PCR, ELISA, and western blot. BV2 cells were transfected with miR-182-5p mimics, inhibitors, siTLR4, or negative control (NC) using lipofectamine 2000 reagent. To confirm whether TLR4 is a direct target of miR-182-5p, we performed a luciferase reporter assay. In BV2 cells, we observed that OGD upregulated TLR4 expression, but downregulated miR-182-5p expression. We determined that miR-182-5p inhibited TLR4 by directly binding to its 3′-UTR. Furthermore, miR-182-5p suppressed the release of TNF-a, IL-6, and IL-1β. In vivo: A middle cerebral artery occlusion (MCAO) rat model was used to mimic cerebral ischemia-reperfusion. Iba1 and TLR4 double staining was used to demonstrate that the target of miR-182-5p in microglial cells, and the mediator of the anti-inflammatory effect, is TLR4. TTC staining was performed to evaluate the infarct volume. Compared to the animals treated with miR-182-5p NC and normal saline, rats treated with miR-182-5p mimics demonstrated significantly enhanced neurological functions. TTC staining results were consistent with neurological function test findings. In summary, our data suggested that miR-182-5p exhibits potential neuroprotective effects in the cerebral ischemia-reperfusion injury via the regulation of the TLR4-mediated inflammatory response." @default.
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• W2894820514 date "2018-11-01" @default.
• W2894820514 modified "2023-10-07" @default.
• W2894820514 title "MicroRNA-182-5p attenuates cerebral ischemia-reperfusion injury by targeting Toll-like receptor 4" @default.
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• W2894820514 doi "https://doi.org/10.1016/j.bbrc.2018.09.165" @default.
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