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作 者:骆菲[1,2] 曹云[1] 杨群[1] 朱列伟[3] 熊蔓[1]
机构地区:[1]复旦大学附属儿科医院新生儿科,上海201102 [2]复旦大学附属妇产科医院新生儿科 [3]复旦大学附属儿科医院病理科,上海201102
出 处:《中国新生儿科杂志》2011年第2期106-110,共5页Chinese Journal of Neonatology
摘 要:目的探讨机械通气下吸入一氧化氮(NO)对胎粪吸入综合征(MAS)新生猪脑不同部位胆碱能神经元的保护作用及对星形胶质细胞增殖的影响。方法 建立新生猪胎粪吸入模型,并予间歇正压通气,随机分为胎粪吸入组(n=10)和NO治疗组(n=4),另设正常对照组(n=4)。HE染色计数大脑皮质、海马及基底节神经元细胞,免疫组化法检测皮层、海马及基底节胆碱乙酰基转移酶(ChAT)和胶质纤维酸性蛋白(GFAP)免疫阳性细胞数。结果 胎粪吸入组脑不同部位的神经元细胞和ChAT阳性细胞数均较正常对照组减少[神经元细胞:皮质(29.6±2.3)比(58.2±3.8),海马(27.0±12.7)比(56.0±3.7),基底节(25.0±4.6)比(56.0±4.6);ChAT阳性细胞:皮质(16.7±3.9)比(38.3±9.0),海马(17.5±2.7)比(34.3±11.6),基底节(17.0±1.2)比(35.3±7.1),P均<0.01],GFAP阳性细胞数增多[皮质(54.8±11.0)比(22.0±5.5),海马(54.9±14.7)比(21.0±1.7),基底节(53.8±7.1)比(19.0±4.6),P均<0.001)]。NO治疗组神经元细胞数和ChAT阳性细胞数均多于胎粪吸入组,GFAP阳性细胞数少于胎粪吸入组,P均<0.05。结论 新生猪MAS后吸入NO可减少脑不同部位胆碱能神经元的丢失及星形胶质细胞的增殖,提示吸入NO可能对MAS引起的脑损伤具有保护作用。Objective To study the effect of nitric oxide(NO) inhaltion on different parts of neurons and proliferation of astrocytes in newborn piglets after meconium aspiration.Methods Meconium aspiration was induced in newborn piglets,these animals were subjected to mechanical ventilation and randomized into two groups:meconium aspiration group(n=10),meconium aspiration + NO inhalation treatment group(n=4).A group of normal newborn piglets were used as control group(n=4).By the end of the experiment,the piglets were killed and each brain was removed from the skull.Brain tissues were then fixed with 10% buffered formalin.HE and immunohistochemical staining were performed in all groups on paraffin tissues.The numbers of neurons,the choline acetyltransferase(ChAT) and glial fibriliary acidic protein(GFAP) immunopositive cells were examined.Results Meconium aspiration resulted in a significant loss of neurons [cortex:(29.6±2.3) vs(58.2±3.8),P0.001,hippocampus:(27.0±12.7) vs(56.0±3.7),P0.001,basal ganglia:(25.0±4.6) vs(56.0±4.6),P0.001] and ChAT immunopositive neurons compared to the control group [cortex:(16.7±3.9) vs(38.3±9.0),P0.001,hippocampus:(17.5± 2.7) vs(34.3±11.6),P0.001,basal ganglia:(17.0±1.2) vs(35.3±7.1),P0.01].The number of GFAPimmunopositive cells in meconium aspiration group was greater than that of the control group significantly [cortex:(54.8±11.0)vs(22.0±5.5),P0.001,hippocampus:(54.9±14.7)vs(21.0±1.7),P0.01,basal ganglia:(53.8±7.1) vs(19.0±4.6),P0.001].Inhaled nitric oxide treatment prevented the loss of neurons [cortex:(29.6±2.3) vs(39.2±1.9),P0.001,hippocampus:(27.0± 12.7) vs(37.0±2.2),P0.01,basal ganglia:(25.0±4.6) vs(36.7±3.5),P0.01] and ChAT immunopositive neurons [cortex:(16.7± 3.9) vs(24.3±3.8),P0.05,hippocampus:(17.5±2.7) vs(25.0±2.9),P0.05,basal ganglia:(17.0±1.2) vs(27.7±2.5),P0.05].Inhaled nit
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