The zinc effects on the learning and memory ability were investigated in the zinc-deficient(ZD)and pair-fed(PF) rats and it was found that(1 ) The rate of body weight gaining and the feed-efficiency ratio were signifi...The zinc effects on the learning and memory ability were investigated in the zinc-deficient(ZD)and pair-fed(PF) rats and it was found that(1 ) The rate of body weight gaining and the feed-efficiency ratio were significantly lower in ZD group than in PF gr展开更多
Introduction Gangliosides are found at high concentration in CNS, and are essentially combined with neuronal membrane. The chemical structures of gangliosides have been determined. They are a family of molecules consi...Introduction Gangliosides are found at high concentration in CNS, and are essentially combined with neuronal membrane. The chemical structures of gangliosides have been determined. They are a family of molecules consisting of a lipid portion anchored in the plasma membrane and a carbohydrate portion on the outer cell surface containing one or more sialic acid residues. The hydrophihc carbohydrate portion is related to the regulation of Ca<sup>2+</sup> channel. Exogenous ganglioside administration may have facilitatory effects on展开更多
文摘The zinc effects on the learning and memory ability were investigated in the zinc-deficient(ZD)and pair-fed(PF) rats and it was found that(1 ) The rate of body weight gaining and the feed-efficiency ratio were significantly lower in ZD group than in PF gr
文摘Introduction Gangliosides are found at high concentration in CNS, and are essentially combined with neuronal membrane. The chemical structures of gangliosides have been determined. They are a family of molecules consisting of a lipid portion anchored in the plasma membrane and a carbohydrate portion on the outer cell surface containing one or more sialic acid residues. The hydrophihc carbohydrate portion is related to the regulation of Ca<sup>2+</sup> channel. Exogenous ganglioside administration may have facilitatory effects on
文摘目的观察高铜饮食对大鼠神经行为功能及海马突触相关蛋白表达的影响。方法30只SD雄性大鼠按照随机数字表法分为对照组、高铜饮食组,每组15只。对照组大鼠喂食普通饲料、普通水,高铜饮食组大鼠喂食硫酸铜含量为1 g/kg的高铜饲料和0.185%浓度的硫酸铜去离子水12周。采用电感耦合等离子体-原子发射光谱法和等离子体-质谱法分别检测大鼠血清、海马中铜的含量,并通过刻板行为实验、旷场实验、Morris水迷宫实验检测大鼠的神经行为功能;Western blot技术检测海马微管相关蛋白2(microtubule associated protein 2,MAP2)、生长相关蛋白43(growth associated protein 43,GAP43)的表达水平。运用SPSS 22.0进行统计分析,两组间比较采用两独立样本t检验。结果与对照组比较,高铜饮食组大鼠血清铜[(1.67±0.69)mg/L、(1.98±0.24)mg/L,t=17.53,P<0.05]及海马组织游离铜[(3.52±1.24)mg/g、(4.78±0.57)mg/g,t=10.34,P<0.05]的含量高,刻板行为评分明显高[(0.29±0.08)分、(2.97±0.72)分,t=14.33,P<0.01],旷场实验中穿行空格数[(153.40±24.73)个、(92.46±19.46)个,t=7.50,P<0.01]和直立次数均少[(19.34±1.98)次、(10.57±2.71)次,t=10.12,P<0.01],Morris水迷宫定位航行实验中平均潜伏期长[(3.14±1.67)s、(8.29±2.26)s,t=7.10,P<0.01],空间探索实验中穿越原平台位置次数少[(7.89±2.48)次、(2.98±1.73)次,t=3.23,P<0.01]。高铜饮食组大鼠较对照组大鼠海马区GAP43[(1.03±0.05)、(0.48±0.02),t=39.56,P<0.05]、MAP2[(0.93±0.05)、(0.30±0.08),t=25.86,P<0.05]蛋白表达明显减少。结论高铜饮食可使大鼠多种神经行为功能指标异常,而海马区神经元突触界面MAP2及GAP43的表达减少可能参与了神经行为功能中学习记忆损害的发生过程。
