目的探讨新型化合物Y-IP5对吗啡诱导小鼠行为敏化和条件性位置偏爱(conditioned place preference,CPP)的影响。方法测定小鼠的自发活动,观察Y-IP5对小鼠自发活动及急性给予吗啡所诱导小鼠高活动性的影响;慢性吗啡处理小鼠,建立小鼠吗...目的探讨新型化合物Y-IP5对吗啡诱导小鼠行为敏化和条件性位置偏爱(conditioned place preference,CPP)的影响。方法测定小鼠的自发活动,观察Y-IP5对小鼠自发活动及急性给予吗啡所诱导小鼠高活动性的影响;慢性吗啡处理小鼠,建立小鼠吗啡行为敏化和CPP模型,观察Y-IP5对行为敏化形成、转化、表达及CPP形成的影响。结果单次或多次给予Y-IP5都不影响小鼠的自发活动,但能抑制急性给予吗啡所致的小鼠高活动性(P<0.05);Y-IP5本身不诱导小鼠形成行为敏化和CPP,但能抑制吗啡诱导小鼠形成行为敏化和CPP(P<0.05),但Y-IP5对吗啡诱导小鼠行为敏化的转化和表达无抑制作用。结论Y-IP5对阿片类药物的精神依赖可能具有干预作用。展开更多
目的:观察延胡索和左旋延胡索乙素(l-THP)是否具有精神依赖性。方法:80只大鼠随机分为延胡索高、中、低剂量组,l-THP高、中、低剂量组,生理盐水对照组,吗啡组。前6组大鼠每天分别灌胃(ig)延胡索生药0.5、1.0、2.0g·kg-1,l-THP1.0、...目的:观察延胡索和左旋延胡索乙素(l-THP)是否具有精神依赖性。方法:80只大鼠随机分为延胡索高、中、低剂量组,l-THP高、中、低剂量组,生理盐水对照组,吗啡组。前6组大鼠每天分别灌胃(ig)延胡索生药0.5、1.0、2.0g·kg-1,l-THP1.0、2.0、4.0mg·kg-1,吗啡组每天皮下注射(sc)吗啡(10mg·kg-1),生理盐水对照组给予等体积生理盐水,进行条件性位置偏爱(conditioned place preference,CPP)训练,时间10d。结果:高、中、低剂量延胡索和l-THP组大鼠在伴药箱中的停留时间均无明显延长,且同一组大鼠在伴药箱中的停留时间与训练前比,差异也无显著性,未形成CPP;而吗啡组对伴药箱明显形成CPP。结论:延胡索和l-THP不具有精神依赖性,无成瘾性。展开更多
目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(...目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(10ml·kg-1,ip)、MA给药组(2mg·kg-1,ip)、氯胺酮给药组(15mg·kg-1,ip)、MA与氯胺酮合用组(MA2mg·kg-1,ip;氯胺酮15mg·kg-1,ip,提前30min注射)。采用倾向性训练程序训练小鼠,训练8d,隔天进行药物匹配训练,隔天生理盐水训练。停药24d后,氯胺酮组和两药合用组位置偏爱消失后,d25采用训练期时所用药物一半的剂量进行激发。分别记录15min之内小鼠各阶段在伴药侧停留的时间。结果MA或氯胺酮单独使用以及两者联合给药均可使小鼠出现CPP。氯胺酮的CPP效应维持时间较短,停药d9已消失,同时可抑制MA的CPP持续时间,两组再次激发均不重现。MA组小鼠位置偏爱在停药后25d里并未消失,激发后可使该效应显著增强。结论氯胺酮也是一种能够促使小鼠产生位置偏爱的药物,停药后短期内可增强MA引起位置偏爱的强度,但可抑制CPP的维持时间,同时抑制MA再激发后CPP重现。展开更多
The effect of low and high freqency electroacupuncture (EA) on the cocaine cravi ng was evaluated based on conditioned place preference (CPP) paradigm. Drug ind uced CPP in animals has been considered as a model of dr...The effect of low and high freqency electroacupuncture (EA) on the cocaine cravi ng was evaluated based on conditioned place preference (CPP) paradigm. Drug ind uced CPP in animals has been considered as a model of drug craving. In the prese nt experiments, rats were trained with an injection (i.p.) of different doses of cocaine under a "biased" CPP schedule and preference scores (PSs) were recorde d on the test session and used as the indicator of preference. 2 and 100 Hz of E A were given respectively before testing, with treatment of foot shock, needle i nsertion, restriction in the holder and no treatment being as the different kind s of control. The timecourse of the effect of EA on 5 mg/kg cocaine induced CPP was also observed. The results showed: ① The PSs after saline (0.27±0.08,n=12) and 0.5 mg/kg of cocaine (0 .26±0.10, n=12) conditioning had no difference from that of natural preference (0.38±0.12, n=12) (P>0.05), while the PSs of 1 ( 0.65±0.12, n=12), 5 (0.70± 0.09, n=12) and 10 mg/kg (0. 71± 0.09, n=12) of cocaine conditioning were significantly higher than tha t of natural preference (P<0.001), indicating that the 1 mg/kg and hig her doses of cocaine can induce significant place preference, which represents c ocaine craving. ② The PSs of 0.5 mg/kg of cocaine conditioning were similar wit h each other (P>0.05, compared with initial expression of CPP) when tes ting daily for at least 10 consecutive days, indicating that the cocaine craving is maintained for a long time once acquired. ③ 100 Hz EA significantly decreas ed the PSs of cocaine conditioning (P<0.05, compared with control grou p), while the treatment of 2 Hz of EA and all other kinds of control we used did n’t (P>0.05). ④ 100 Hz EA inhibited cocaine induced CPP when tested 10, 24 and 48 hours after stimulation. The results of the present study suggest that EA inhibits the cocaine craving in a frequency specific way and the effect of one treatment of EA maintains at least 48 hours.展开更多
文摘目的探讨新型化合物Y-IP5对吗啡诱导小鼠行为敏化和条件性位置偏爱(conditioned place preference,CPP)的影响。方法测定小鼠的自发活动,观察Y-IP5对小鼠自发活动及急性给予吗啡所诱导小鼠高活动性的影响;慢性吗啡处理小鼠,建立小鼠吗啡行为敏化和CPP模型,观察Y-IP5对行为敏化形成、转化、表达及CPP形成的影响。结果单次或多次给予Y-IP5都不影响小鼠的自发活动,但能抑制急性给予吗啡所致的小鼠高活动性(P<0.05);Y-IP5本身不诱导小鼠形成行为敏化和CPP,但能抑制吗啡诱导小鼠形成行为敏化和CPP(P<0.05),但Y-IP5对吗啡诱导小鼠行为敏化的转化和表达无抑制作用。结论Y-IP5对阿片类药物的精神依赖可能具有干预作用。
文摘目的:观察延胡索和左旋延胡索乙素(l-THP)是否具有精神依赖性。方法:80只大鼠随机分为延胡索高、中、低剂量组,l-THP高、中、低剂量组,生理盐水对照组,吗啡组。前6组大鼠每天分别灌胃(ig)延胡索生药0.5、1.0、2.0g·kg-1,l-THP1.0、2.0、4.0mg·kg-1,吗啡组每天皮下注射(sc)吗啡(10mg·kg-1),生理盐水对照组给予等体积生理盐水,进行条件性位置偏爱(conditioned place preference,CPP)训练,时间10d。结果:高、中、低剂量延胡索和l-THP组大鼠在伴药箱中的停留时间均无明显延长,且同一组大鼠在伴药箱中的停留时间与训练前比,差异也无显著性,未形成CPP;而吗啡组对伴药箱明显形成CPP。结论:延胡索和l-THP不具有精神依赖性,无成瘾性。
文摘目的研究单独使用甲基苯丙胺(methamphetamine,MA)或氯胺酮及两者联合给药致小鼠条件性位置偏爱(conditioned place preference,CPP)效应及停药后和停药后重激发的位置偏爱的变化情况。方法36只♂昆明小鼠分为4组,分别为生理盐水对照组(10ml·kg-1,ip)、MA给药组(2mg·kg-1,ip)、氯胺酮给药组(15mg·kg-1,ip)、MA与氯胺酮合用组(MA2mg·kg-1,ip;氯胺酮15mg·kg-1,ip,提前30min注射)。采用倾向性训练程序训练小鼠,训练8d,隔天进行药物匹配训练,隔天生理盐水训练。停药24d后,氯胺酮组和两药合用组位置偏爱消失后,d25采用训练期时所用药物一半的剂量进行激发。分别记录15min之内小鼠各阶段在伴药侧停留的时间。结果MA或氯胺酮单独使用以及两者联合给药均可使小鼠出现CPP。氯胺酮的CPP效应维持时间较短,停药d9已消失,同时可抑制MA的CPP持续时间,两组再次激发均不重现。MA组小鼠位置偏爱在停药后25d里并未消失,激发后可使该效应显著增强。结论氯胺酮也是一种能够促使小鼠产生位置偏爱的药物,停药后短期内可增强MA引起位置偏爱的强度,但可抑制CPP的维持时间,同时抑制MA再激发后CPP重现。
文摘The effect of low and high freqency electroacupuncture (EA) on the cocaine cravi ng was evaluated based on conditioned place preference (CPP) paradigm. Drug ind uced CPP in animals has been considered as a model of drug craving. In the prese nt experiments, rats were trained with an injection (i.p.) of different doses of cocaine under a "biased" CPP schedule and preference scores (PSs) were recorde d on the test session and used as the indicator of preference. 2 and 100 Hz of E A were given respectively before testing, with treatment of foot shock, needle i nsertion, restriction in the holder and no treatment being as the different kind s of control. The timecourse of the effect of EA on 5 mg/kg cocaine induced CPP was also observed. The results showed: ① The PSs after saline (0.27±0.08,n=12) and 0.5 mg/kg of cocaine (0 .26±0.10, n=12) conditioning had no difference from that of natural preference (0.38±0.12, n=12) (P>0.05), while the PSs of 1 ( 0.65±0.12, n=12), 5 (0.70± 0.09, n=12) and 10 mg/kg (0. 71± 0.09, n=12) of cocaine conditioning were significantly higher than tha t of natural preference (P<0.001), indicating that the 1 mg/kg and hig her doses of cocaine can induce significant place preference, which represents c ocaine craving. ② The PSs of 0.5 mg/kg of cocaine conditioning were similar wit h each other (P>0.05, compared with initial expression of CPP) when tes ting daily for at least 10 consecutive days, indicating that the cocaine craving is maintained for a long time once acquired. ③ 100 Hz EA significantly decreas ed the PSs of cocaine conditioning (P<0.05, compared with control grou p), while the treatment of 2 Hz of EA and all other kinds of control we used did n’t (P>0.05). ④ 100 Hz EA inhibited cocaine induced CPP when tested 10, 24 and 48 hours after stimulation. The results of the present study suggest that EA inhibits the cocaine craving in a frequency specific way and the effect of one treatment of EA maintains at least 48 hours.
