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Effects of chronic sleep deprivation on learning and memory abilities, brain dopamine content and D1 receptor expression in rats
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- Author:
- No author available
- Journal Title:
- Academic Journal of Second Military Medical University
- Issue:
- 9
- DOI:
- 10.3724/SP.J.1008.2012.00959
- Key Word:
- 睡眠剥夺;学习;记忆;多巴胺;多巴胺D1受体;海马;下丘脑
Abstract： 目的 研究慢性睡眠剥夺(CSD)对大鼠学习记忆功能的损害以及对海马、下丘脑中多巴胺(DA)含量和D1受体表达量的影响.方法 健康成年雄性SD大鼠经过筛选后随机分为CSD组、大平台铁丝网格实验对照(TC)组和空白对照(BC)组,每组10只.采用改良多平台睡眠剥夺法建立大鼠CSD模型,每天剥夺18h,连续21d.TC组除剥夺箱底为罩有铁丝网格的大平台外,其他环境与CSD组一致.利用Morris水迷宫和自主活动箱在CSD的第7、14、21天检测大鼠学习记忆功能的变化；CSD 21d后分别应用高效液相-电化学(HPLC-ECD)法和蛋白质印迹法检测大鼠海马、下丘脑中DA含量和D1受体蛋白表达量的变化.结果 与BC组和TC组相比,CSD组大鼠毛色无光泽、精神疲惫且易激惹,自CSD 3 d起,体质量在各时间点降低,差异有统计学意义(P＜0.01).CSD组大鼠与其他两组相比,逃逸潜伏期在各时间点延长,穿环数减少,差异有统计学意义(P＜0.01)；与其他两组相比,CSD组大鼠自主活动总路程缩短(P＜0.05)、自主活动次数减少(P＜0.01)；HPLC-ECD及蛋白质印迹结果显示,CSD组大鼠与其他两组相比,海马及下丘脑中DA含量、D1受体蛋白表达均减少,差异有统计学意义(P＜0.05).TC组与BC组大鼠相比,学习记忆能力、各脑区DA含量和D1受体蛋白表达差异均无统计学意义.结论 CSD可损害大鼠学习记忆功能,海马、下丘脑中DA含量和D1受体表达水平降低可能是其潜在机制之一.
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