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Biochemical and biological analysis of Philodryas baroni (Baron's green racer; Dipsadidae) venom: relevance to the findings of human risk assessment.
Sánchez, M N; Timoniuk, A; Maruñak, S; Teibler, P; Acosta, O; Peichoto, M E.
Afiliação
  • Sánchez MN; 1Facultad de Ciencias Veterinarias, Universidad Nacional del Nordeste, Corrientes, Argentina.
Hum Exp Toxicol ; 33(1): 22-31, 2014 Jan.
Article em En | MEDLINE | ID: mdl-23800999
Philodryas baroni--an attractively colored snake--has become readily available through the exotic pet trade. Most people consider this species harmless; however, it has already caused human envenomation. As little is known about the venom from this South American opisthoglyphous "colubrid" snake, herein, we studied its protein composition by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), as well as its effects on the hemostatic system. Both reducing and nonreducing SDS-PAGE analysis demonstrated that the venom exhibits greatest complexity in the range of 50-80 kDa. The venom displayed proteolytic activity toward azocollagen, with a specific activity of 75.5 U mg⁻¹, and rapidly hydrolyzed the Aα-chain of fibrinogen, exhibiting lower activity toward the Bß- and γ-chains. The venom from P. baroni showed no platelet proaggregating activity per se, but it inhibited collagen- and thrombin-induced platelet aggregation. Prominent hemorrhage developed in mouse skin after intradermal injection of the crude venom, and its minimum hemorrhagic dose was 13.9 µg. When injected intramuscularly into the gastrocnemius of mice, the venom induced local effects such as hemorrhage, myonecrosis, edema, and leucocyte infiltration. Due to its venom toxicity shown herein, P. baroni should be considered dangerous to humans and any medically significant bite should be promptly reviewed by a qualified health professional.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Endopeptidases / Venenos de Serpentes / Inibidores da Agregação Plaquetária / Colubridae / Proteínas de Répteis / Anticoagulantes Tipo de estudo: Diagnostic_studies / Etiology_studies / Risk_factors_studies País/Região como assunto: America do sul / Argentina Idioma: En Revista: Hum Exp Toxicol Assunto da revista: TOXICOLOGIA Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Argentina País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Endopeptidases / Venenos de Serpentes / Inibidores da Agregação Plaquetária / Colubridae / Proteínas de Répteis / Anticoagulantes Tipo de estudo: Diagnostic_studies / Etiology_studies / Risk_factors_studies País/Região como assunto: America do sul / Argentina Idioma: En Revista: Hum Exp Toxicol Assunto da revista: TOXICOLOGIA Ano de publicação: 2014 Tipo de documento: Article País de afiliação: Argentina País de publicação: Reino Unido