Low-level laser therapy decreases local effects induced by myotoxins isolated from bothrops jararacussu snake venom
J. venom. anim. toxins incl. trop. dis
;
16(3): 470-479, 2010. ilus, graf
Artigo
em Inglês
| LILACS
| ID: lil-557176
ABSTRACT
The prominent myotoxic effects induced by Bothrops jararacussu crude venom are due, in part, to its polycationic myotoxins, BthTX-I and BthTX-II. Both myotoxins have a phospholipase A2 structure BthTX-II is an active enzyme Asp-49 PLA2, while BthTX-I is a Lys-49 PLA2 devoid of enzymatic activity. In this study, the effect of low-level laser therapy (LLLT), 685 nm laser at a dose of 4.2 J/cm2 on edema formation, leukocyte influx and myonecrosis caused by BthTX-I and BthTX-II, isolated from Bothrops jararacussu snake venom, was analyzed. BthTX-I and BthTX-II caused a significant edema formation, a prominent leukocyte infiltrate composed predominantly by neutrophils and myonecrosis in envenomed gastrocnemius muscle. LLLT significantly reduced the edema formation, neutrophil accumulation and myonecrosis induced by both myotoxins 24 hours after the injection. LLLT reduced the myonecrosis caused by BthTX-I and BthTX-II, respectively, by 60 and 43 percent; the edema formation, by 41 and 60.7 percent; and the leukocyte influx, by 57.5 and 51.6 percent. In conclusion, LLLT significantly reduced the effect of these snake toxins on the inflammatory response and myonecrosis. These results suggest that LLLT should be considered a potential therapeutic approach for treatment of local effects of Bothrops species venom.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Bothrops
/
Venenos de Crotalídeos
/
Terapia com Luz de Baixa Intensidade
/
Edema
Limite:
Animais
Idioma:
Inglês
Revista:
J. venom. anim. toxins incl. trop. dis
Assunto da revista:
Toxicologia
Ano de publicação:
2010
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Butantan Institute/BR
/
Camilo Castelo Branco University/BR
/
Nove de Julho University/BR
/
University of São Paulo/BR
/
Vale do Paraíba University/BR
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