General Synthesis of β-Alanine-Containing Spider Polyamine Toxins and Discovery of Nephila Polyamine Toxins 1 and 8 as Highly Potent Inhibitors of Ionotropic Glutamate Receptors
摘要:
Certain spiders contain large pools of polyamine toxins, which are putative pharmacological fools awaiting further discovery. Here we present a general synthesis strategy for this class of-toxins and prepare five structurally varied polyamine toxins. Electrophysiological testing at three ionotropic glutamate receptor subtypes reveals that two of these, Nephila polyamine toxins 1 (NPTX-1) and 8 (NPTX-8), comprise intriguing pharmacological activities by having subnanomolar IC50 values at kainate receptors.