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Presynaptic neuromuscular action of a methanolic extract from the venom of Rhinella schneideri toad J. Venom. Anim. Toxins incl. Trop. Dis.
Rostelato-Ferreira,Sandro; Belo,Cháriston A Dal; Leite,Gildo B; Hyslop,Stephen; Rodrigues-Simioni,Léa.
BackgroundRhinella schneideri, previously known as Bufo paracnemis, is a common toad in many regions of Brazil. Its venom exerts important cardiovascular effects on humans and other animals. Although this toad venom has been the subject of intense investigations, little is known about its neuromuscular activity.MethodsThe neurotoxicity of a methanolic extract of R. schneideri venom was tested on mouse phrenic nerve-diaphragm (PND) preparations mounted for conventional twitch tension recording – in response to indirect stimulation – and for electrophysiological measurements.ResultsVenom extract (50 μg/mL) increased the muscle twitch tension in PND preparations but did not significantly alter the resting membrane potential values. Electrophysiological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neurotransmitter release; Ouabain; Presynaptic; Rhinella schneideri; Toad venom.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200332
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