Kappa-bungarotoxin blockade of nicotine electrophysiological actions in cerebellar Purkinje neurons.

The agonistic actions of nicotine in cerebellum were selectively blocked by kappa-bungarotoxin depending on the cell type studied. Nicotine-induced Purkinje cell inhibitions were antagonized by the simultaneous application of this toxin. In contrast, nicotine-induced cerebellar interneuron excitations were unaltered. These findings suggest that kappa-bungarotoxin may be used as a selective pharmacological tool for the study of nicotine actions which are dependent on ganglionic-like receptors, which have been associated with Purkinje cells in previous studies.