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Pharmacological characterization of the enhancement of apomorphine-induced gnawing in mice by cocaine.

机译:可卡因可增强阿扑吗啡诱导的小鼠咬的药理特性。

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The present study was designed to provide additional information on the behavioral and pharmacological mechanisms associated with the augmentation of apomorphine-induced gnawing in C57BL/6J mice. (-)-Cocaine enhanced apomorphine-induced gnawing at doses devoid of effects on gnawing when given alone. The effect was stereoselective, with (+)-cocaine devoid of activity in this test. Peripheral synapses may also not be critical to the cocaine enhancement, as cocaine methiodide, a charged species, was also without effect. The local anesthetic actions of cocaine were evaluated with lidocaine, a local anesthetic without prominent dopaminergic actions. Like (-)-cocaine, lidocaine augmented the gnawing response to apomorphine without increasing climbing or gnawing when given alone. (+)-Amphetamine enhanced apomorphine-induced gnawing but only at a high dose that increased gnawing by itself. The selective dopamine uptake blocker. GBR 12909, augmented apomorphine-induced gnawing without increasing gnawing when given alone; however, unlike cocaine or lidocaine, GBR 12909 increased climbing at doses that augmented the gnawing response. These data indicate that the cocaine-augmented gnawing response to apomorphine does not appear to be the result of psychomotor stimulation per se. Rather, this effect may be due to blockade of dopamine uptake and/or the local anesthetic actions of cocaine.
机译:本研究的目的是提供与C57BL / 6J小鼠中阿扑吗啡诱导的咬伤增加有关的行为和药理机制的其他信息。 (-)-可卡因单独服用时,对阿扑吗啡诱导的咀嚼作用增强,而对咀嚼没有影响。该效果是立体选择性的,在该测试中,(+)-可卡因没有活性。外围突触对于可卡因的增强也可能不是关键的,因为可卡因甲硫醇(一种带电荷的物种)也没有作用。用利多卡因评估可卡因的局部麻醉作用,利多卡因是一种没有明显的多巴胺能作用的局部麻醉剂。像(-)-可卡因一样,利多卡因单独使用时会增加对阿扑吗啡的咬嚼反应,而不会增加攀爬或咬咬。 (+)-苯丙胺可增强阿扑吗啡诱发的,但仅在高剂量时可增加本身。选择性多巴胺摄取阻滞剂。 GBR 12909,单用阿扑吗啡可增加咬人感,而不会增加咬人感;但是,与可卡因或利多卡因不同,GBR 12909在增加咬伤反应的剂量下增加了攀爬。这些数据表明,可卡因对阿扑吗啡的增强反应似乎不是精神运动刺激的结果。而是,这种效果可能是由于多巴胺摄取的阻断和/或可卡因的局部麻醉作用。

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