Dendrotoxin-like effects of noxiustoxin

Harvey, A L and Marshall, D L and Possani, L D (1992) Dendrotoxin-like effects of noxiustoxin. Toxicon, 30 (11). pp. 1497-1500. ISSN 1879-3150 (https://doi.org/10.1016/0041-0101(92)90528-D)

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Abstract

Noxiustoxin from the Mexican scorpion (Centruroides noxius Hoffmann) is known to block neuronal K+ channels. Noxiustoxin facilitated acetylcholine release in chick biventer cervicis nerve-muscle preparations, but not in mouse phrenic nerve-hemidiaphragm preparations. Noxiustoxin displaced binding of a radiolabelled dendrotoxin from synaptosomal membranes from rat brain, with a Ki of 10(-10) M. It is concluded that noxiustoxin shares some pharmacological properties with the K+ channel blocking dendrotoxins.