Effects of local mild hypothermia on apoptotic neurons and expression of glutamate transporter and metabotropic glutamate receptor following cerebral ischemia in rats / 临床神经病学杂志

ABSTRACT

Objective To investigate the effects of focal mild hypothermia on apoptotic neurons and the expression of glutamate transporter(GLT-1)and metabotropic glutamate receptor(mGluR2/3)after cerebral ischemia in rats.Methods Eighty-eight adult rats were randomly divided into mild hypothermia group,normothermia group and control group.Unilateral permanent middle cerebral artery occlusion(pMCAO)was induced.In mild hypothermia group,the brain temperature of occlusive side was decreased and maintained for 3 h at(33?0.5)℃ with Sticking Focal Mild Hypothermia Instrument.The body temperature of normothermia group was maintained at(37?0.5)℃.3 h,6 h,12 h,24 h,3 d,7 d after cerebral ischemia,the expression of GLT-1 and mGluR2/3 around infarction cortex were determined by Western Blot.6 h,24 h,3 d,7 d after cerebral ischemia,TUNEL method was performed to label neuronal apoptosis.Results 24 h,3 d after cerebral ischemia of mild hypothermia group,24 h,3 d,7 d after cerebral ischemia of normothermia group,the apoptotic neurons around infarction core markedly increased comparing with 6 h after cerebral ischemia(all P