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Male, but not female, Sprague Dawley rats display enhanced fear learning following acute ethanol withdrawal (hangover)
Pharmacology Biochemistry and Behavior ( IF 3.6 ) Pub Date : 2021-07-08 , DOI: 10.1016/j.pbb.2021.173229
Paige Marsland 1 , Allissa Parrella 1 , Andrew S Vore 1 , Thaddeus M Barney 1 , Elena I Varlinskaya 1 , Terrence Deak 1
Affiliation  

The present studies investigated the effects of withdrawal from a single binge-like dose of ethanol (hangover) on fear conditioning in male and female Sprague Dawley rats. In Experiment 1, males and females were given 0 or 3.5 g/kg ethanol intraperitoneally (i.p.) and then conditioned to contextual fear 24 h post injection. Withdrawal from acute ethanol enhanced expression of the conditioned freezing response in males, but not in females. Experiment 2 demonstrated that in males, withdrawal from acute ethanol administered 24 h prior to conditioning enhanced contextual fear conditioning, but not auditory-cued fear conditioning. In Experiment 3, male and female rats were given 3.5 g/kg ethanol, and blood ethanol concentrations (BECs) were assessed at various time points for determination of ethanol clearance. Female rats cleared ethanol at a higher rate than males, with 10 h required for females and 14 for males to eliminate ethanol from their systems. Because females cleared ethanol faster than males, in Experiment 4, females were conditioned 18 h after ethanol administration to keep the interval between ethanol clearance and fear conditioning similar to that of males. Withdrawal from acute ethanol given 18 h prior to conditioning did not affect both contextual and auditory-cued fear conditioning in females. In summary, these results highlight sex differences in the impact of withdrawal from acute ethanol (hangover) on fear learning; suggesting that males are more sensitive to hangover-associated enhancement of negative affect than females.



中文翻译:

雄性,但不是雌性,Sprague Dawley 大鼠在急性乙醇戒断(宿醉)后表现出增强的恐惧学习

本研究调查了从单次狂饮样剂量的乙醇(宿醉)中退出对雄性和雌性 Sprague Dawley 大鼠恐惧条件反射的影响。在实验 1 中,男性和女性腹膜内 (ip) 给予 0 或 3.5 g/kg 乙醇,然后在注射后 24 小时适应情境恐惧。从急性乙醇中撤出增强了男性条件性冷冻反应的表达,但在女性中没有。实验 2 表明,在男性中,在条件反射前 24 小时从急性乙醇中撤出会增强情境恐惧条件反射,但不会增强听觉提示的恐惧条件反射。在实验 3 中,给予雄性和雌性大鼠 3.5 g/kg 乙醇,并在不同时间点评估血液乙醇浓度 (BEC) 以确定乙醇清除率。雌性大鼠清除乙醇的速度高于雄性大鼠,雌性大鼠需要 10 小时,雄性大鼠需要 14 小时才能从系统中清除乙醇。因为女性清除乙醇的速度比男性快,所以在实验 4 中,女性在乙醇给药后 18 小时进行调理,以保持乙醇清除和恐惧调理之间的间隔与男性相似。在调节前 18 小时从急性乙醇中撤出不会影响女性的情境和听觉提示的恐惧调节。总之,这些结果突出了急性乙醇戒断(宿醉)对恐惧学习的影响的性别差异。表明男性对宿醉相关的负面影响增强比女性更敏感。因为女性清除乙醇的速度比男性快,所以在实验 4 中,女性在乙醇给药后 18 小时进行调理,以保持乙醇清除和恐惧调理之间的间隔与男性相似。在调节前 18 小时从急性乙醇中撤出不会影响女性的情境和听觉提示的恐惧调节。总之,这些结果突出了急性乙醇戒断(宿醉)对恐惧学习的影响的性别差异。表明男性对宿醉相关的负面影响增强比女性更敏感。因为女性清除乙醇的速度比男性快,所以在实验 4 中,女性在乙醇给药后 18 小时进行调理,以保持乙醇清除和恐惧调理之间的间隔与男性相似。在调节前 18 小时从急性乙醇中撤出不会影响女性的情境和听觉提示的恐惧调节。总之,这些结果突出了急性乙醇戒断(宿醉)对恐惧学习的影响的性别差异。表明男性对宿醉相关的负面影响增强比女性更敏感。在调节前 18 小时从急性乙醇中撤出不会影响女性的情境和听觉提示的恐惧调节。总之,这些结果突出了急性乙醇戒断(宿醉)对恐惧学习的影响的性别差异。表明男性对宿醉相关的负面影响增强比女性更敏感。在调节前 18 小时从急性乙醇中撤出不会影响女性的情境和听觉提示的恐惧调节。总之,这些结果突出了急性乙醇戒断(宿醉)对恐惧学习的影响的性别差异。表明男性对宿醉相关的负面影响增强比女性更敏感。

更新日期:2021-07-14
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