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Lobeline augments and inhibits cocaine-induced hyperactivity in rats

机译:洛贝林增强并抑制可卡因诱导的大鼠活动过度

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Lobeline has high affinity for nicotinic receptors and alters presynaptic dopamine storage and release in brain. Moreover, lobeline decreases the reinforcing and locomotor-activating properties of methamphetamine, suggesting that lobeline may be a pharmacotherapy for psychostimulant abuse. This study determined if lobeline alters cocaine-induced hyperactivity and if lobeline alters the induction and/or expression of sensitization to cocaine. On Days 1-12, male rats were administered lobeline (0.3 or 1.0 mg/kg) or saline, placed in an automated activity monitor for 20 min, administered cocaine (10, 20 or 30 mg/kg) or saline and returned to the monitor for 60 min. On Day 13, the effect of lobeline on the induction and expression of sensitization to cocaine was determined. Lobeline did not alter the effect of cocaine after acute injection. However, 1.0 mg/kg lobeline attenuated cocaine (10 and,20 mg/kg)-induced hyperactivity after repeated administration and prevented the development of sensitization to these cocaine doses. Interestingly, 0.3 mg/kg lobeline augmented cocaine (10 mg/kg)-induced hyperactivity after repeated administration. Lobeline did not alter the effect of 30 mg/kg cocaine. The present results indicate a complex interaction of lobeline with cocaine and support other research indicating a role for nicotinic receptors in the development of sensitization to psychostimulants. (c) 2006 Elsevier Inc. All rights reserved.
机译:洛贝林对烟碱样受体具有高亲和力,并改变突触前多巴胺在大脑中的存储和释放。此外,肝胆碱降低了甲基苯丙胺的增强和运动活化特性,表明肝胆碱可能是滥用精神兴奋剂的药物疗法。这项研究确定了肝胆碱是否会改变可卡因诱导的活动过度,以及肝糖是否会改变对可卡因致敏的诱导和/或表达。在第1-12天,给雄性大鼠服用肝胆碱(0.3或1.0 mg / kg)或生理盐水,置于自动活动监测仪中20分钟,给予可卡因(10、20或30 mg / kg)或生理盐水,然后返回监控60分钟。在第13天,确定了肝胆碱对可卡因的诱导和敏化表达的影响。在急性注射后,Lobeline不会改变可卡因的作用。但是,在反复给药后,1.0 mg / kg的肝胆碱减弱了可卡因(10和20 mg / kg)引起的过度活跃,并阻止了对这些可卡因剂量的致敏作用。有趣的是,在重复给药后,0.3 mg / kg的卵磷脂增加了可卡因(10 mg / kg)引起的活动过度。洛贝林未改变30 mg / kg可卡因的作用。目前的结果表明,烟碱与可卡因之间存在复杂的相互作用,并支持其他研究,表明烟碱受体在对精神兴奋剂致敏作用的发展中具有一定作用。 (c)2006 Elsevier Inc.保留所有权利。

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