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Effects of NAc ablation on the withdraw signs and plasma β-EP in heroin-dependent rats
Author(s): 
Pages: 443-446
Year: Issue:  7
Journal: ACTA ACADEMIAE MEDICINAE XUZHOU

Keyword:  海洛因依赖伏隔核β-内啡肽;
Abstract: 目的 观察毁损海洛因依赖大鼠伏隔核(NAc)对戒断症状及血浆β-内啡肽(β-EP)的影响.方法 ①海洛因依赖组(实验组)按逐日递增原则皮下注射海洛因建立海洛因依赖模型,首日每次剂量3 mg/kg,雌雄不拘,每日2次,连续9天皮下注射海洛因;对照组注射等量生理盐水.②毁损NAe:毁损电极插入NAc,通直流电进行毁损.实验组大鼠20只,分为实验I组(海洛因依赖组)和实验Ⅱ组(依赖后行NAc毁损),每组10只;对照组大鼠20只分为对照I组(NAc未毁损组),对照Ⅱ组(NAc毁损组),每组10只.比较实验I组和实验Ⅱ组戒断症状的变化;③β-EP检测:实验I组、实验Ⅱ组、对照I组、对照Ⅱ组大鼠取躯干血置入抗凝试管中,混匀离心,放射免疫法测定4组大鼠血浆β-EP水平,比较各组大鼠血浆β-EP水平的变化.结果 ①戒断症状:毁损大鼠NAc后,除湿抖症状外,其他戒断症状均较毁损前减轻(P<0.01);②血浆β-EP:与对照I组比较,实验I组血浆β-EP水平下降,对照Ⅱ组血浆β-EP水平上升(P均<0.05);实验Ⅱ组血浆β-EP水平上升,与实验I组比较差异有显著性(P<0.05).结论 毁损NAe后,海洛因依赖大鼠的戒断症状减轻;NAc参与β-EP水平的调节.
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