低氧预适应对缺血再灌注脑损伤小鼠学习记忆的影响及机制研究  被引量:4

Effects of hypoxic preconditioning on learning and memory in mice with cerebral ischemia-reperfu- sion injury and underlying mechanisms

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作  者:黄媛媛[1] 张颜波[1] 李美艺 杨明峰[1] 赵同[1] 牛敬忠[1] 

机构地区:[1]泰山医学院附属医院神经内科,泰安271000 [2]山东省泰山医院神经内科,泰安271000

出  处:《中华行为医学与脑科学杂志》2016年第2期108-111,共4页Chinese Journal of Behavioral Medicine and Brain Science

基  金:山东省自然科学基金项目(ZR2010HM029)

摘  要:目的初步探讨低氧预适应对缺血再灌注脑损伤小鼠学习记忆的影响及H丁能保护机制。方法将健康成年昆明小鼠采用随机数字表法分为正常对照组(N组)、低氧预适应组(HPC组)、假手术组(C组)、缺血再灌注组(0组)和低氧适应±缺血再灌注组(HPC±O组),HPC±O组于缺血再灌注前24h给予低氧预处理。采用Morris水迷宫检测各组小鼠的平均逃避潜伏期及平台象限的游泳时间,免疫荧光检测小鼠脑组织海马CA1区神经细胞凋亡情况。结果HPC±0组平均逃避潜伏期第2天、第3天、第4天[分别为(39.92±4.52)s、(30.98±2.44)s及(19.69±4.27)s]均明显低于0组[分别为(54.35±3.66)s、(46.31±4.81)S及(36.81-±3.86)S],而平台象限游泳时间百分比[(36.44±5.33)%]均明显高于0组[(24.50±2.59)%,P〈0.05]。HPC±O组凋亡神经细胞荧光懂度为(1.17±0.14),而0组为(1.35±0.14)(P〈0.05)。结论低氧预适应可能通过增加缺血性再灌注脑损伤小鼠海马CA1区神经细胞对缺氧的耐受性,减少神经细胞凋亡的发生。Objective To investigate the effects of hypoxic preconditioning on learning and memory and the possible protective mechanism in mice with cerebral isehemia-repeffusion injm% Methods Healthy adult male Kunming mice were randomly divided into five groups by Random number table: normal group( N group ) , hypoxic preconditioning group ( HPC group ) , sham operation group ( C group ) , ischemia-reperfusion group ( 0 group) , hypoxic preconditioning and ischemia-repeffusion group ( HPC ± 0 group ). HPC ± 0 group were given hypoxie preconditioning before 24h of ischemia- reperfusion. The escape latency was detected by Morris water maze and the neuron apoptosis of CA1 area of hippocampal was determined by immunofluores- cence technique.Results The escape latency in HPC±O group on the second,third and fourth day of MWM was (39.92±4.52) s, (30.98±2.44) s, (19.69±4.27) s, and significantly lower than that in 0 group( ( 54.35± 3.66) s, (46.31±4.81)s, (36.81±3.86)s).Mice in HPC±O spent longer time in the target quadrant than that in 0 group ( ( 36.44± 5.33 ) % and ( 24.5± 2.59 ) %, respectively, P〈 0.05 ). hnmunofluorescence showed that the apoptotic ration of nerve cells in hippocampal CA1 was significantly lower than that in 0 group( 1.17± 0.14 and 1.35±0.14, P〈0.05). Conclusion Hypoxic preconditioning can increase hippocampal CA1 neurotrs hypoxia tolerance of ischemia reperfusion injury in mice ,and reduce the incidence of neural cell apoptosis.

关 键 词:低氧预适应 缺血再灌注脑损伤 学习记忆 细胞凋亡 

分 类 号:R749.13[医药卫生—神经病学与精神病学]

 

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