毒理性
bicuculline的作用主要是针对离子型GABAA受体,这是一种与主要跨细胞膜传递氯离子的配体门控离子通道有关的受体,从而对目标神经元产生抑制作用。这些受体是苯二氮卓类药物和相关抗焦虑药物的主要靶标。bicuculline对GABAA受体的半数最大抑制浓度(IC50)为3微摩尔。除了是一种强大的GABAA受体拮抗剂外,bicuculline还可以用来阻断钙激活的钾通道。根据IUPHAR的定义,对bicuculline的敏感性是定义GABAA受体的主要标准之一。
The action of bicuculline is primarily on the ionotropic GABAA receptors, which are ligand-gated ion channels concerned chiefly with the passing of chloride ions across the cell membrane, thus promoting an inhibitory influence on the target neuron. These receptors are the major targets for benzodiazepines and related anxiolytic drugs. The half-maximal inhibitory concentration (IC50) of bicuculline on GABAA receptors is 3 μM. In addition to being a potent GABAA receptor antagonist, bicuculline can be used to block Ca2+-activated potassium channels. Sensitivity to bicuculline is defined by IUPHAR as a major criterion in the definition of GABAA receptors.
来源:Toxin and Toxin Target Database (T3DB)