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• W2026006402 endingPage "67" @default.
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• W2026006402 abstract "Tanshinone IIA (TSA) has been reported to protect neurons and microvascular endothelial cells against ischemic injury. However, the effect of TSA on astrocytes in response to ischemic injury is not clear. The aims of this study were to evaluate the effect of TSA on astrocytes following ischemic insult. Primary cultured rat astrocytes were treated with oxygen–glucose deprivation (OGD) followed by recovery. Cell death was measured by lactate dehydrogenase assay. Astrocyte proliferation was determined by cell viability assay, cell counting and 5-bromo-2-deoxyuridine incorporation assay. The glial fibrillary acidic protein (GFAP) expression was assessed by immunocytochemistry. Stromal cell-derived factor-1 (SDF-1) secretion from astrocytes was measured by enzyme linked immunosorbent assay. The expressions of hypoxia inducible factor-1α (HIF-1α), SDF-1, GFAP and the phosphorylation of Akt and extracellular regulated protein kinase (Erk) 1/2 were evaluated by immunoblot assay. Quantitative RT-PCR was used to assess the mRNA expression of HIF-1α and SDF-1. Mild OGD (2 h-OGD) did not induce astrocyte injury but proliferation at 48 and 72 h after recovery. Mild OGD also induced the accumulation of HIF-1α, the subsequent expression and secretion of SDF-1, resulting in the phosphorylation of Erk1/2 and Akt. TSA attenuated astrocyte proliferation and significantly decreased the OGD-induced accumulation of HIF-1α and SDF-1, then blocked the downstream signaling, Erk1/2 and Akt activation. TSA inhibits the astrocyte proliferation induced by sub-lethal ischemic insult via blocking the activation of HIF-1α/SDF-1 pathway. This finding suggests that TSA may be a potential therapeutic option for gliosis after cerebral ischemia." @default.
• W2026006402 created "2016-06-24" @default.
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• W2026006402 date "2014-09-01" @default.
• W2026006402 modified "2023-10-04" @default.
• W2026006402 title "Tanshinone IIA dampens the cell proliferation induced by ischemic insult in rat astrocytes via blocking the activation of HIF-1α/SDF-1 signaling" @default.
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• W2026006402 doi "https://doi.org/10.1016/j.lfs.2014.07.020" @default.
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