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首页> 外文期刊>Physiology & behavior >Caffeine dependence in rats: effects of exposure duration and concentration.
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Caffeine dependence in rats: effects of exposure duration and concentration.

机译:大鼠咖啡因依赖性:暴露时间和浓度的影响。

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摘要

Groups of rats were chronically exposed to a 1.0-g/L caffeine solution for 5, 10, 15 or 20 days. Upon removal of caffeine, rats were given brief exposure to a novel flavour CS (withdrawal CS) followed by 12 days of plain water and then brief exposure to a second flavour CS (neutral CS). Only rats exposed to 20 days of caffeine strongly preferred the neutral CS to the withdrawal CS in a 2-bottle test. In Experiment 2, groups of rats were chronically exposed to caffeine at one of four concentrations (1.0, 0.5, 0.25, or 0.125 g/L) for 21 days, after which withdrawal and neutral CSs were established. Only rats that drank the highest caffeine concentration, 1.0 g/L, preferred the neutral CS to the withdrawal CS. This suggests that long exposure to a strong caffeine solution is required in order to induce dependence in rats such that a CS associated with the withdrawal of caffeine becomes avoided.
机译:将各组大鼠长期暴露于1.0 g / L咖啡因溶液中5、10、15或20天。去除咖啡因后,将大鼠短暂暴露于一种新型风味剂CS(戒断CS),然后将其置于普通水中12天,然后短暂暴露于另一种风味剂CS(中性CS)。在2瓶测试中,仅暴露于咖啡因20天的大鼠强烈建议中性CS优于戒断CS。在实验2中,将成组的大鼠长期暴露于四种浓度(1.0、0.5、0.25或0.125 g / L)之一的咖啡因中21天,之后建立戒断和中性CS。只有喝咖啡因浓度最高(1.0 g / L)的大鼠才更喜欢中性CS而不是戒断CS。这表明需要长时间暴露于强咖啡因溶液中以诱导大鼠的依赖性,从而避免了与咖啡因戒断有关的CS。

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