A novel depolarizing activity of scorpion venom fraction M1 due to activation of skeletal muscle nicotinic receptors.
2007
Abstract A depolarizing activity following interaction with nicotinic acetylcholine receptors (nAchRs) in skeletal muscle cells, was observed for the first time in the non-toxic venom fraction (M1) of the yellow scorpion Buthus occitanus tunetanus (Bot). The effects of M1 fraction were tested on cultured rat myotubes by recording changes in [Ca 2+ ]i. When applied, M1 (10 μg/mL) induced a transient increase of [Ca 2+ ] i which could be blocked by a prior application of α -Bungarotoxin ( α -Bg-Tx).
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