美金刚联合丰富环境对快速衰老小鼠海马脑源性神经营养因子、酪氨酸蛋白激酶受体B表达及学习记忆能力的影响

被引:14
作者
杜明洋
管青山
王小姗
机构
[1] 南京医科大学附属脑科医院神经内科
关键词
快速衰老小鼠; 美金刚; 丰富环境; 脑源性神经营养因子; 酪氨酸蛋白激酶受体B;
D O I
暂无
中图分类号
R749.16 [];
学科分类号
100203 ;
摘要
目的探讨美金刚联合丰富环境对快速衰老小鼠(SAMP8)海马脑源性神经营养因子(BDNF)、酪氨酸蛋白激酶受体B(TrkB)表达及学习记忆能力的影响。方法 24只雄性SAMP8小鼠随机分为对照组﹑丰富环境治疗组(丰富环境组)﹑美金刚治疗组(美金刚组)和美金刚联合丰富环境组(联合治疗组),每组6只小鼠。治疗8周后,采用Morris水迷宫试验检测小鼠空间学习记忆能力,免疫印记法和实时定量PCR法检测小鼠海马组织中BDNF、TrkB的表达水平。结果与对照组比较,丰富环境组、美金刚组小鼠在试验第3 d起寻找到平台的潜伏期明显缩短,联合治疗组小鼠在试验第2 d起的逃避潜伏期明显缩短(P<0.05~0.01);且联合治疗组小鼠在试验第4 d时的逃避潜伏期明显短于丰富环境组和美金刚组(均P<0.05)。与对照组比较,其余3组小鼠穿越平台次数明显增多(P<0.05~0.01);且联合治疗组小鼠穿越平台次数明显多于丰富环境组和美金刚组(均P<0.01)。与对照组比较,其余3组小鼠海马BDNF mRNA、BDNF蛋白和TrkB蛋白的表达均明显升高(P<0.05~0.01),其中联合治疗组明显高于丰富环境组与美金刚组(P<0.05~0.01)。各组小鼠海马TrkB mRNA表达的差异无统计学意义。结论美金刚和丰富环境治疗能够有效地改善SAMP8小鼠学习记忆能力并增加海马BDNF和TrkB的表达,二者联合治疗时效果更显著。
引用
收藏
页码:278 / 281
页数:4
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