纳洛酮对吗啡成瘾大鼠海马脑电功率谱的影响  被引量:2

Effects of naloxone on the hippocampal electroencephalographic power spectrum in morphine-addicted rats

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作  者:和晓明 王晓琴[2] 王功伍[3] 

机构地区:[1]云南师范大学生命科学学院,昆明650500 [2]云南师范大学体育学院,昆明650500 [3]生物能源持续开发利用教育部工程研究中心和云南省生物质能与环境生物技术重点实验室

出  处:《中华行为医学与脑科学杂志》2015年第10期869-872,共4页Chinese Journal of Behavioral Medicine and Brain Science

基  金:国家自然科学基金项目(31060142);教育部“春晖计划”合作科研项目(Z2011126);云南省应用基础研究计划(2011FZ084);云南省高校民族体质健康与高原训练生物适应重点实验室项目

摘  要:目的探讨阿片受体拮抗剂纳洛酮(naloxone,Nx)对吗啡成瘾大鼠海马脑电功率谱的影响。方法20只雄性Wistar大鼠,分为盐水组(n=10)和吗啡戒断组(rb=10),经8d生理盐水(1ml/kg)、盐酸吗啡(10mg/kg)交替皮下注射后建立躯体依赖模型,然后经盐酸纳洛酮(Nx,5mg/kg)腹腔注射观察其戒断反应;另取大鼠20只,分为盐水条件性位置偏爱(conditionedplacepreference,CPP)组(n=10)和吗啡CPP组(n=10),经8d盐水、吗啡交替注射训练建立CPP模型,然后经麻醉后注射Nx,记录Nx注射前后的背侧海马脑电,并分析功率谱数据。结果(1)与盐水戒断组比较,Nx使吗啡戒断组的戒断分数显著增加[(22.69±3.59)分VS(84.90±13.40)分,P〈0.01];(2)吗啡CPP组测试期CPP分数[(80.69±14.96)分]相较自身基础值[(45.29±15.79)分]和盐水CPP组测试期分数[(41.84±12.47)分]均显著增加(P〈0.01);(3)Nx使吗啡CPP组的海马EEG功率谱8频段功率[(81.80±30.91)mV2·Hz]较自身基线[(112.49±39.43)mV2·Hz)]、1频段功率[(25.35±11.20)mV2·Hz]较自身基线[(28.71±13.06)mV2·Hz]均可逆性的降低,差异具有统计学意义(P〈0.05)。结论Nx可降低吗啡成瘾大鼠海马脑电功率谱δ频段和γ频段功率。Objective To investigate the effect of opiate receptor antagonist naloxone on the electroencephalographic (EEG) power spectrum in morphine-addicted rats. Methods 20 male adult Wistar rats were alternately injected with morphine ( Mf, 10 mg/kg, sc. ; Mf withdrawal (Mf-Wd) group, n= 10) or saline ( Sal, 1 ml/ kg, sc. ; Sal-Wd group, n= 10) for 8 days to establish Mf physical dependent model.Withdrawal scores were evaluated by naloxone-precipitated withdrawl signs (5 mg/kg, ip. ). Another 20 rats were divided into Sal-CPP group and Mf-CPP group with 10 rats in each group.Rats in the sal-CPP group were injected with saline once a day for 8 days while rats in the Mf-CPP group were injected with saline and morphine alternatively once a day for 8 days.The EEG signals were recorded from their dorsal hippocampi before and after naloxone injection under anesthesia; and the EEG power data (1-100 Hz) were analyzed. Results (1) Compared with Sal-Wd group (22.69±3.59),the Mf-Wd group showed a higher withdrawal scores after naloxone injection( 84.90± 13.40, P〈0.01 ). (2) The CPP scores of Mf-CPP rats (80.69± 14.96) were significantly higher than the baseline (45.29± 15.79) and the Sal-CPP rats (41.84±12.47; all P〈0.01). (3)After naloxone injection,the EEG powers ofδ band and γ band of Mf-CPP rats decreased temporarily compared with their baseline ( δ band : ( 81.80± 30.91 ) mV2 . Hz vs ( 112.49± 39.43 ) mV2 . Hz; y band:(25.35±11.20)mV2 . Hzvs (28.71±13.06)mV2 . Hz; allP〈0.05). Conclusion Opiate receptor antagonist naloxone can decrease the hippocampal EEG powers of δ band and γ band in Mr-addicted rats.

关 键 词:吗啡 纳洛酮 海马 脑电图 功率谱 

分 类 号:R749.61[医药卫生—神经病学与精神病学]

 

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