1989
DOI: 10.1016/0041-0101(89)90040-8
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Myonecrosis induced in mice by a basic myotoxin isolated from the venom of the snake Bothrops nummifer (jumping viper) from Costa Rica

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Cited by 76 publications
(47 citation statements)
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“…The catalytic activity of the PLA 2 on the membrane suggests an important role these enzymes in the toxicity of snake venoms (svPLA 2 s). The breakdown of phospholipids causes severe changes in the structural and functional integrity of the plasmatic membrane with a consequent influx of calcium ions [62], release of calcium-dependent proteases [63], activation of endogenous PLA 2 s [64], and mitochondrial collapse [65]. The sum of all these molecular changes could lead to cell death.…”
Section: Resultsmentioning
confidence: 99%
“…The catalytic activity of the PLA 2 on the membrane suggests an important role these enzymes in the toxicity of snake venoms (svPLA 2 s). The breakdown of phospholipids causes severe changes in the structural and functional integrity of the plasmatic membrane with a consequent influx of calcium ions [62], release of calcium-dependent proteases [63], activation of endogenous PLA 2 s [64], and mitochondrial collapse [65]. The sum of all these molecular changes could lead to cell death.…”
Section: Resultsmentioning
confidence: 99%
“…Since it would have been unethical to administer T. equestre extracts to human subjects, we chose an established model of myonecrosis in mice. [5][6][7] Extracts of T. equestre were prepared and then administered by gavage (gastric intubation) in a dose equivalent to that ingested by the patients. The animals were then assessed for evidence of rhabdomyolysis.…”
Section: Methodsmentioning
confidence: 99%
“…Sin embargo, el lugar de unión a la membrana muscular de todas las miotoxinas de venenos de serpientes permanece aún sin ser conocido, aunque se reconoce que pueden estar involucrados determinados componentes de la membrana de la célula muscular que determinarían la especificidad de unión al sarcolema y la falta de acción sobre otras membranas celulares como, por ejemplo, la de glóbulos rojos, lo cual ha sido verificado también con la miotoxina de B. brazili (Pantigoso et al, 2001). Por otro lado la falta de actividad de fosfolipasa de la miotoxina estudiada, corrobora el concepto de que el daño en la fibra muscular, no es a través de la hidrólisis directa de fosfolípidos de membrana (Gutiérrez et al, 1989).…”
Section: Discussionunclassified
“…Algunos datos estructurales y farmacológicos sugieren la presencia en la miotoxina, de un dominio para el daño de la membrana, probablemente formado por la combinación de residuos básicos e hidrofóbicos (Gutiérrez et al, 1989;Volpe et al, 1986;Yudkowsky, et al, 1994). Gutiérrez et al (1984) también refieren que la miotoxina de B. asper afecta la integridad de la membrana plasmática, ya que induce un rápido incremento en el plasma de los niveles de creatina kinasa, y produce además una elevación de la concentración de calcio citosólico.…”
Section: Introductionunclassified