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- W394507614 abstract "BACKGROUND: Activation of N-methyl-D-aspartate receptor(NMDAR)is a key link of exitotoxictiy at the phase of cerebral ischemic injury.Because NMDAR is a main way to mediate internal flow of Ca2+ among glutamic acid receptors,over-excitation can cause neuronal apoptosis.Calcitonin gene related peptide has a strongly biological activity.On one hand,it can play the protective effect through inhibiting the expression of NMDAR1 mRNA;on the other hand,it can play the protective effect through down-regulating the expression of NMDAR1 mRNA by exogenous calcitonin gene related peptide.OBJECTIVE: To observe the expression of NMDAR1 and the regulatory effect of calcitonin gene related peptide on the expression of NMDAR1 mRNA and protein in the cerebral cortex of rats with focal cerebral ischemia/reperfusion(I/R).DESIGN: Randomized controlled animal study.SETTING: China Medical University.MATERIALS: A total of 216 healthy male Wistar rats,general grade,weighing 250-280 g,were selected in this study.Twelve rats were randomly selected to regard as control group;meanwhile,other 204 rats were used to establish middle cerebral artery occlusion/reperfusion (MACO)models.The main reagents were detailed as follows:calcitonin gene related peptide (Sigma Company);calcitonin gene related peptide kit (Boster Company);antibodyⅠ,Ⅱand antibody β-actin Ⅰ,Ⅱ of NMDAR1 mRNA and chemiluminescence reagent (Santa Cruz Company,USA)METHODS:The experiment was carried out in the Laboratory of Neurobiology of China Medical University from August 2005 to June 2006. ①Right MCAO models of rats were established to cause focal ischemia and scored based on Zea Longa five-grade scale. If the scores were 1,2 and 3 after wakefulness,the MACO models were established successfully and involved in the experiment. A total of 120 rats with successful modeling were randomly divided into I/R group and administration group with 60 in each group.All rats in the both groups were observed at five time points,including 6,12,24,48 and 72 hours after reperfusion an" @default.
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- W394507614 date "2006-01-01" @default.
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- W394507614 title "Controlling N-methyl-D-aspartate receptor subunit 1 with calcitonin gene related peptide after cerebral ischemic injury" @default.
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