毒理性
毒蝇鹅膏素是一种强效的GABAA激动剂,激活大脑主要抑制性神经递质GABA的受体。毒蝇鹅膏素实际上与GABAA受体复合物上的同一结合位点结合,与GABA本身一样,而不是像其他GABAergic药物(如巴比妥类药物和苯二氮卓类药物)那样结合到单独的调节位点。GABAA受体在大脑中广泛分布,因此当毒蝇鹅膏素被给药时,它会改变多个区域的神级元活动,包括大脑皮层、海马和脑干。然而,尽管毒蝇鹅膏素传统上被认为是一种选择性的GABAA激动剂,它也是GABAC受体的强效部分激动剂,因此其效果概况是同时对这两个目标的作用结果。(L1142)
Muscimol is a potent GABAA agonist, activating the receptor for the brain's major inhibitory neurotransmitter, GABA. Muscimol actually binds to the same binding site on the GABAA receptor complex as GABA itself, as opposed to other GABAergic drugs such as barbiturates and benzodiazepines which bind to separate regulatory sites. GABAA receptors are widely distributed in the brain, and so when muscimol is administered, it alters neuronal activity in multiple regions including the cerebral cortex, hippocampus, and cerebellum. However while muscimol is conventionally thought of as a selective GABAA agonist, it is also a potent partial agonist at the GABAC receptor, and so its effects profile results from a combined action at both targets. (L1142)
来源:Toxin and Toxin Target Database (T3DB)