毒理性
这项研究检查了血清素耗竭和β-肾上腺素能拮抗对水迷宫任务可见平台和隐藏平台版本表现的影响。雄性长埃文斯大鼠接受了p-氯苯丙氨酸(500 mg/kg x 2)的系统注射以耗竭血清素,或接受普萘洛尔(20或40 mg/kg)以拮抗β-肾上腺素能受体。一些大鼠接受了联合治疗。为了将策略学习与空间学习分开,一半的大鼠在药物给药和空间训练之前进行了莫里斯水迷宫策略的预先训练。单独耗竭血清素或拮抗β-肾上腺素能受体在任一版本的任务中几乎没有或没有损害未经训练或预先训练的大鼠。相比之下,联合耗竭血清素和拮抗β-肾上腺素能受体损害了未经训练的大鼠在可见平台任务中的表现,并损害了未经训练和策略预先训练的大鼠在隐藏平台任务中的表现,还导致了感觉运动损害。
This study examined the effects of serotonergic depletion and beta-adrenergic antagonism on performance in both visible platform and hidden platform versions of the water maze task. Male Long-Evans rats received systemic injections of p-chlorophenylalanine (500 mg/kg x 2) to deplete serotonin, or propranolol (20 or 40 mg/kg) to antagonize beta-adrenergic receptors. Some rats received treatments in combination. To separate strategies learning from spatial learning, half of the rats underwent Morris' water maze strategies pretraining before drug administration and spatial training. Individual depletion of serotonin or antagonism of beta-adrenergic receptors caused few or no impairments in either naive or pretrained rats in either version of the task. In contrast, combined depletion of serotonin and antagonism of beta-adrenergic receptors impaired naive rats in the visible platform task and impaired both naive and strategies-pretrained rats in the hidden platform task, and also caused sensorimotor impairments. ...
来源:Hazardous Substances Data Bank (HSDB)