Resveratrol downregulates type-1 glutamate transporter expression and microglia activation in the hippocampus following cerebral ischemia reperfusion in rats

Brain Research
Catrinel Girbovan, Hélène Plamondon

Abstract

The naturally occurring polyphenol phytoalexin resveratrol (RSV) regulates neuronal inflammation in various disease models and protects the brain against ischemic injury. Cell surface glutamate transporters on perisynaptic astrocytes are important regulators of extracellular glutamate levels and synaptic activation. Following cerebral ischemia, reduced astroglial type-1 glutamate transporter (GLT-1) expression in the CA1 pyramidal layers of the hippocampus contribute to neurotoxic glutamate levels. The current study examined the effects of 21-day RSV pretreatment (1 or 10mg/kg dose; i.p.) on microglia and astrocyte activation and characterized GLT-1 expression in the dentate gyrus (DG), CA1 and CA3 layers of the hippocampus 7 days following 10min global ischemia. Male Wistar rats were divided into five groups; sham/saline, ischemia/saline, ischemia/1mg/kg RSV, ischemia/10mg/kg RSV and sham/10mg/kg RSV. Immunohistochemical detection of GLT-1, CD11b/c, glial fibrillary acidic protein (GFAP) assessed type 1 glutamate transporter expression and microglial/glial cell activation following sham surgery or global ischemia. Our findings demonstrate prevention by RSV of ischemia-induced reduction of GLT-1 expression in the vulnerable CA1...Continue Reading

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Citations

Jan 16, 2016·Oxidative Medicine and Cellular Longevity·Ji JiaTingting Huo
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