首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Age, sex and early environment contribute to individual differences in nicotine/acetaldehyde-induced behavioral and endocrine responses in rats.
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Age, sex and early environment contribute to individual differences in nicotine/acetaldehyde-induced behavioral and endocrine responses in rats.

机译:年龄,性别和早期环境造成了尼古丁/乙醛诱导的大鼠行为和内分泌反应的个体差异。

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Neonatal handling was used to evaluate the influence of early environment on responses to nicotine. Rats exposed as pups to daily short-term separation from the dam (H) were compared to non-handled (NH) controls. In experiment 1, prepubescent males and females, aged postnatal day (P) 30, were tested for the effect of nicotine/acetaldehyde (NicAc) on open field behavior and plasma corticosterone levels. NicAc induced increases in ambulatory activity and time spent in the center of the field in NH, but not H, males. Drug-induced increases in initial ambulatory activity, but not center time, were also seen in NH and H females. Handling, but not sex, contributed to group differences in plasma corticosterone levels. In experiment 2, NH and H rats were tested for acquisition of NicAc self-administration at three ages, P27-31, P34-38 and P90-94. Age and sex, but not handling, contributed to differences in performance of this task. Whereas males exhibited a decrease in responding with age, females did not. These findings demonstrate that neonatal handling may serve as an experimental model for individual differences in sensitivity to tobacco constituents. Furthermore, the current study indicates that stress reactivity, age and sex may play differential roles in initiating smoking behavior.
机译:新生儿处理被用来评估早期环境对尼古丁反应的影响。将每天与大坝(H)短期分离的幼崽大鼠与未处理的(NH)对照进行比较。在实验1中,测试了出生后第30天的青春期前的男性和女性对烟碱/乙醛(NicAc)的开放视野行为和血浆皮质酮水平的影响。 NicAc诱导了NH男性而不是H男性在活动中心的活动活动和花费的时间增加。在NH和H女性中,也发现了药物引起的初始门诊活动增加,但中心时间没有增加。处理而非性别导致了血浆皮质酮水平的群体差异。在实验2中,测试了NH和H大鼠在P27-31,P34-38和P90-94这三个年龄段的NicAc自我给药。年龄和性别(但没有处理)导致此任务执行的差异。男性表现出随着年龄的增长而下降,而女性则没有。这些发现表明,新生儿处理可作为个体对烟草成分敏感性差异的实验模型。此外,目前的研究表明,压力反应性,年龄和性别在开始吸烟行为中可能起着不同的作用。

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