Artículos de revistas
Anti-sera Raised In Rabbits Against Crotoxin And Phospholipase A 2 From Crotalus Durissus Cascavella Venom Neutralize The Neurotoxicity Of The Venom And Crotoxin
Registro en:
Toxicon. , v. 44, n. 2, p. 141 - 148, 2004.
410101
10.1016/j.toxicon.2004.05.011
2-s2.0-3042708770
Autor
Beghini D.G.
Hernandez-Oliveira S.
Rodrigues-Simioni L.
Novello J.C.
Hyslop S.
Marangoni S.
Institución
Resumen
Crotoxin, the principal neurotoxin in venom of the South American rattlesnakes Crotalus durissus terrificus and Crotalus durissus cascavella, contains a basic phospholipase A2 (PLA2) and an acidic protein, crotapotin. In this work, we examined the ability of rabbit anti-sera against crotoxin and its PLA2 subunit to neutralize the neurotoxicity of venom and crotoxin from C. d. cascavella in mouse phrenic nerve-diaphragm and chick biventer cervicis preparations. Immunoblotting showed that the anti-sera recognized C. d. cascavella crotoxin and PLA2. This was confirmed by ELISA, with both anti-sera having end-point dilutions of 3×10-6. Anti-crotoxin serum neutralized the neuromuscular blockade in phrenic nerve-diaphragm muscle preparations at venom or crotoxin:anti-serum ratios of 1:2 and 1:3, respectively. Anti-PLA2 serum also neutralized this neuromuscular activity at a venom or crotoxin:anti-serum ratio of 1:1. In biventer cervicis preparations, the corresponding ratio for anti-crotoxin serum was 1:3 for venom and crotoxin, and 1:1 and 1:2 for anti-PLA2 serum. The neutralizing capacity of the sera in mouse preparations was comparable to that of commercial anti-serum raised against C. d. terrificus venom. These results show that anti-sera against crotoxin and PLA2 from C. d. cascavella venom neutralized the neuromuscular blockade induced by venom and crotoxin in both nerve-muscle preparations, with the anti-serum against crotoxin being slightly less potent than that against crotoxin. © 2004 Elsevier Ltd. 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