机构地区:[1]天津中医药大学,天津300193 [2]武警医学院军事预防医学研究所,天津300162
出 处:《中国心理卫生杂志》2006年第12期783-786,共4页Chinese Mental Health Journal
基 金:国家自然科学基金资助(39870689);天津市自然科学基金资助(05YFSYSF01500)
摘 要:目的:探索补锌对睡眠剥夺(SD)后大鼠脑认知功能的影响及机制。方法:采用小平台水环境法制作大鼠SD模型,3天后通过Y-型迷宫行为测试结合NADPH-d组化与免疫组化ABC法,分别观察大鼠海马结构不同亚区内一氧化氮合酶(NOS)活性与神经元型一氧化氮合酶(nNOS)蛋白表达水平的变化。结果:SD组大鼠迷宫实验学会次数(89.3±25.3)较正常对照组大鼠(67.1±29.3)增加(t=1.81,P<0.05),补牛磺酸锌(5.9g/kg饲料牛磺酸锌水平)组大鼠的迷宫实验学会次数(71.9±21.4)较SD组减少(t=1.66,P<0.05)。与正常对照组大鼠海马结构的NOS(CA1:32.6±2.1;CA3:20.5±1.8;DG:27.5±1.8)活性和nNOS蛋白(CA1:68.3±4.1;CA3:41.7±2.5;DG:44.4±2.8)表达相比,SD组大鼠海马结构各亚区NOS(CA1:14.8±1.2;CA3:10.6±1.0;DG:13.1±1.3)活性和CA1区与齿状回nNOS蛋白(CA1:51.3±3.6;DG:41.6±2.7)表达减少(P<0.05),CA3区nNOS蛋白变化不明显(38.1±4.8,P>0.05)。与SD组大鼠相比,补牛磺酸锌组大鼠海马结构不同亚区内的NOS表达增加(CA1:27.2±2.8;CA3:15.3±1.6;DG:21.8±1.9,P<0.05),CA1区的nNOS蛋白表达增加(60.1±3.4,P<0.05),CA3和齿状回nNOS表达变化不明显(CA3:39.6±4.9;DG:42.8±3.5,P>0.05)。结论:牛磺酸锌对大鼠学习记忆功能有促进作用,其机理可能与上调海马结构NOS、nNOS表达水平有关。Objective: To observe the effects of zinc supplementation on the function of brain after sleep deprivation (SD) . Methods: Rats SD model was made by the "Flower Pot" technique. Three days later, the rats received Y - labyrinth test to test the function of learning and memory. NADPH - d histochemistry and ABC immunohistochemistry were applied to exam the activity of NOS and the levels of protein expression of nNOS in hippocampus of rats. Results: Compared with the normal group, Learning times of rats in Y - labyrinth test of the SD group increased ( 89. 3 ± 25. 3 / 67. 1 4± 29. 3, t = 1.81, P 〈 0. 05 ) ; Compared with the SD group, the Learning times of rats in Y - labyrinth test in Taurine - Zinc ( TZC ) supplementation ( 5.9g/kg TZC in feeds ) group decreased ( 71.9 ± 21.4, t= 1. 658, P 〈0.05 ) . Compared with the normal group , whose levesl of NOS ( CA1 : 32. 6 ± 2. 1 ; CA3 : 20. 5 ± 1.8 ; DG: :27.5±1.8) and protein expression nNOS (CAI: 68.3 ±4.1; CA3: 41.7±2.5; DG: 44.4±2.8), the levels of NOS in sub - area of hippocampus in SD group ( CA1 : 14. 8 ± 1.2; CA3 : 10. 6 ± 1.0; DG: 13.1 ± 1.3 ) and nNOS protein in CA1 and dentate gyrus ( CA1 : 51.3 ± 3.6; DG: 41.6 ±2. 7 } decreased ( P 〈0.05 ), nNOS protein in CA3 had no obvious change ( 38.1 ± 4. 8, P 〉 0. 05) . Compared with the SD group, in TZC supplementation group, the levels of NOS in sub - area of hippocampus ( CA1 : 27. 2± 2. 8 ; CA3 : 15.3 ± 1.6 ; DG : 21.8 ± 1.9, P 〈 0. 05 ) and nNOS protein in CA1 (60. 1 ± 3.4 ) increased ( P 〈 0.05 ), nNOS protein in CA3 and dentate gyrus had no obvious change ( CA3 : 39.6 ±4. 9 ; DG: 42. 8 ± 3.5, P 〉 0.05 ) . Conclusions: TZC supplementation can improve leaming and memory function of rats, and the mechanisms might be related to increased level of NOS and the protein expression of nNOS in hippocampus of animals.
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