催产素预处理对胎鼠海马脑片缺氧无糖损伤后OTR、GABA_ARβ1表达的影响  

Effects of oxytocin on changes of OTR,GABA_ARβ1 expressions in fetal rat hippocampus induced by oxygen and glucose deprived

作　　者：陆廷凤[1] 于红[2] 

机构地区：[1]东南大学医学院,江苏南京210009 [2]东南大学附属中大医院妇产科,江苏南京210009

出　　处：《东南大学学报（医学版）》2010年第4期372-376,共5页Journal of Southeast University(Medical Science Edition)

基　　金：江苏省自然科学基金面上项目(BK2008302)

摘　　要：目的:研究催产素(OT)预处理对胎鼠海马脑片缺氧无糖损伤后催产素受体(OTR)、γ-氨基丁酸A受体β1亚基(GABAARβ1)表达的影响,探讨OT神经保护的作用机制。方法:采用胎龄20dSD大鼠海马脑片,实验组经含10-6mol·L-1OT人工脑脊液(ACSF)孵育预处理后行缺氧无糖损伤(OGD),对照组经正常ACSF孵育后直接行OGD,各15min,SP免疫组化法半定量测定海马CA1区OTR、GABAARβ1表达变化,电镜观察神经元损伤情况。结果:实验组海马CA1区OTR、GABAARβ1表达均显著高于对照组(t=2.118、P=0.048;t=2.272、P=0.036)。对照组大量神经元受损,核固缩或碎裂,部分核膜溶解,实验组细胞核、粗面内质网、线粒体均较对照组有所改善,核膜较光滑,胞浆肿胀较对照组减轻。结论:OT上调胎鼠海马OTR、GABAARβ1表达,减少神经元变性坏死,增强大脑耐受缺氧损伤的能力,对胎儿中枢神经系统起保护作用。Objective：To study the effects of oxytocin（OT） on changes of oxytocin receptor（OTR）,gamma-amimobutyric acid receptor A β1 subunit（GABAAR β1） expressions in fetus rat hippocampus induced by oxygen and glucose deprivation（OGD）,and to investigate the mechanism of neuroprotective effects of OT.Methods：Gestational age 20 days SD rat hippocampus slices in the experimental group underwent pretreatment incubation by containing 10-6 mol·L-1 OT artificial cerebrospinal fluid（ACSF）,the control group were incubated with normal ACSF.Oxygen and glucose deprivation（OGD） was done for 15 min,respectively.SP immunohistochemistry and semiquantitative technique were taken to determine hippocampus CA1 area OTR,GABAAR β1 expressions,and observe neuronal damage in electron microscopy.Results：The expressions of OTR,GABAAR β1 in CA1 area of hippocampus were significantly higher in the experimental qroup（t =2.118,P = 0.048;t = 2.272,P = 0.036）.A large number of damaged neurons,nuclear condensation or fragmentation,some of the nuclear membrane dissolved in the control group;while nuclei,rough endoplasmic reticulum,mitochondria were improved,nuclear membrane was smooth,cytoplasmic swelling were eased in the experimental group.Conclusion：OT can increase hippocampal OTR,GABAAR β1 expressions,decrease neuronal degeneration and necrosis,enhance the capacity of the brain tolerance to hypoxia,and play the protective effects on fetal nervous system.

关 键 词：催产素 海马 缺氧无糖损伤 催产素受体 γ-氨基丁酸A受体β1亚基 

分 类 号：R-33[医药卫生]