Bupropion and its main metabolite reverse nicotine chronic tolerance in the mouse.

Bupropion and its main metabolite reverse nicotine chronic tolerance in the mouse.
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安非他酮及其主要代谢物可逆转小鼠的尼古丁慢性耐受性。

DOI:
10.1093/ntr/nts088
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发表时间:
2012
期刊:
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco
影响因子:
--
通讯作者:
Damaj,MohamadImad
Damaj,MohamadImad
中科院分区:
--
文献类型:
--
作者:
Grabus,SheriD;Carroll,FrankIvy;Damaj,MohamadImad

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虽然抗抑郁药安非他酮是用来帮助戒烟的,但人们对其在这方面的作用机制知之甚少。一个可能影响戒烟成功的因素是尼古丁耐受性,它可以促进高水平的尼古丁摄入量,以保持尼古丁的主观效果(从而使减少吸烟的尝试更加困难)。方法观察安非他酮及其活性羟基代谢物对尼古丁耐受性的调节作用,给小鼠注射生理盐水或尼古丁14 d。第14天给予生理盐水、(2S、3S)-羟基安非他酮或不同剂量的安非他酮。第15天,小鼠在测试日进行尼古丁诱导的镇痛和低温试验。结果长期注射生理盐水+尼古丁的小鼠均对尼古丁产生耐受性。安非他酮和(2S,3S)-羟基安非他酮剂量依赖性逆转慢性尼古丁耐受。结论安非他酮对尼古丁的抑制作用(抗痛觉作用和低温作用)在很大程度上是由神经元α4β2*尼古丁受体介导的,因此安非他酮对戒烟的促进作用可能与降低尼古丁耐受性有关。
IntroductionAlthough the antidepressant bupropion is prescribed to aid in smoking cessation, little is known concerning its mechanisms of action in this regard. One factor that might influence quit success is nicotine tolerance, which could promote high levels of nicotine intake in order to maintain nicotine’s subjective effects (thereby making attempts to reduce smoking more difficult).MethodsTo explore whether bupropion and its active hydroxymetabolite modulate nicotine tolerance, mice were injected for 14 days with saline or nicotine. On Day 14, animals received saline, (2S,3S)-hydroxybupropion, or bupropion at different doses. On Day 15, mice were assayed on test day for nicotine-induced analgesia and hypothermia.ResultsAnimals chronically injected with saline + nicotine developed tolerance to nicotine’s effects in both assays. Administration of bupropion and (2S,3S)-hydroxybupropion dose-dependently reversed chronic nicotine tolerance.ConclusionsThese results indicate that bupropion’s ability to promote smoking cessation may be partly due to its attenuation of nicotine tolerance since both measured responses of nicotine (antinociception and hypothermia) are mediated to a large extent by neuronal α4β2* nicotine receptors.
安非他酮对大鼠的尼古丁样辨别刺激作用。
DOI: --
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发表时间: 1986
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