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Pharmacological characterization of venoms obtained from Mexican toxoglossate gastropods on isolated guinea pig ileum J. Venom. Anim. Toxins incl. Trop. Dis.
Rojas,A; Feregrino,A; Ibarra-Alvarado,C; Aguilar,MB; Falcón,A; Heimer de la Cotera,E.
The protein-containing extracts prepared from the venom ducts of Conus austini, Conus spurius and Polystira albida caused a concentration-dependent inhibition of spontaneous contractions in guinea pig ileum. The most potent extract was obtained from P. albida venom ducts (IC50 = 0.11 ± 0.02 µg protein/mL). The three extracts produced a moderate inhibition of contractions elicited by acetylcholine (ACh 1 µM), suggesting the presence of anticholinergic compounds. The contractile response elicited by nicotine (10 µM) was significantly reduced by the extracts prepared from the ducts of C. austini and P. albida, which indicates that the venom produced by these species contains toxins that target neuronal nicotinic receptors. All three extracts significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conoidea; Conus austini; Conus spurius; Guinea pig ileum; Polystira albida; Turridae.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300009
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