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Effect of intrauterine hypoxia and Angelica sinensis injection on dentate gyrus neurons and learning and memory in juvenile rats

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neural Regeneration Research 2009年第3期4卷 218-224页

作者： Feng Zhao Yi Han Jing Ma Hong YU Yan He Xiaoming Zhong department of Histology and Embryology Luzhou Medical College Luzhou 646000 Sichuan Province China department of Pediatrics the First-Affiliated Hospital of Gannan Medical College Ganzhou 341000 Jiangxi Province China

BACKGROUnd： The present study analyzed the effect of 3 days （2 h/d） intrauterine hypoxia on learning and memory in juvenile rats, as well as the therapeutic effects of Angelica sinensis on dentate gyrus neurons, as well as learning and memory. OBJECTIVE： To explore the effects of intrauterine hypoxia on hippocampal dentate gyrus neurons, as well as learning and memory, in juvenile rats; to explore n-methyi-d-aspartate receptor-1 （nMdAR1） expression in the dentate gyrus of neonatal rats following intrauterine hypoxia, as well as prolonged hypoxia; to investigate the regulatory mechanisms of Angelica sinensis. dESIGn, TIME And SETTInG： A randomized and controlled experiment based on developmental neurobiology was performed at the department of Histology and Embryology in Luzhou Medical College from October 2007 to October 2008. MATERIALS： Angelica sinensis solution （250 g/L） was obtained from Central South Hospital of Wuhan University, China. neuron-specific enolase and nMdAR1 mRnA in situ hybridization reagents were provided by Wuhan Boster Biological Technology, China. Image-Pro Plus 6.0 analysis system was purchased from Media Cybernetics, USA. METHOdS： Healthy pregnant Sprague dawley rats （n = 30） were randomly divided into control （n = 10）, hypoxia （n = 10）, and Angelica （n = 10） groups. The Angelica and hypoxia pregnant rats were placed in a three-gas incubator （oxygen concentration： 13%） starting with day 14 of pregnancy for 2 hours/day for 5 consecutive days to establish a fetal rat intrauterine hypoxia model. One hour prior to modeling, the pregnant rats from the Angelica and hypoxia groups received Angelica sinensis and normal saline （8 mL/kg） injections, respectively, through the caudal vein. The control group procedures were identical to the hypoxia group, but lacked the hypoxic conditions. MAIn OUTCOME MEASURES： Brain tissues of neonatal rats were used to detect expression of nMdAR1 mRnA, and brain tissues of juvenile rats aged 30 days were used to determ

关键词： Angelica sinensis hypoxia hippocampus n-methyi-d-aspartate receptor-1 learning memory

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