Melittin induces in vitro death of Leishmania (Leishmania) infantum by triggering the cellular innate immune response
J. venom. anim. toxins incl. trop. dis
; 22: 1, 2016. tab, graf
Article
em En
| LILACS
| ID: lil-773438
Biblioteca responsável:
BR1.1
ABSTRACT
Abstract Background Apis mellifera venom, which has already been recommended as an alternative anti-inflammatory treatment, may be also considered an important source of candidate molecules for biotechnological and biomedical uses, such as the treatment of parasitic diseases. Methods Africanized honeybee venom from Apis mellifera was fractionated by RP-C18-HPLC and the obtained melittin was incubated with promastigotes and intracellular amastigotes of Leishmania (L.) infantum. Cytotoxicity to mice peritoneal macrophages was evaluated through mitochondrial oxidative activity. The production of anti- and pro-inflammatory cytokines, NO and H2O2 by macrophages was determined. Results Promastigotes and intracellular amastigotes were susceptible to melittin (IC50 28.3 μg.mL−1 and 1.4 μg.mL−1, respectively), but also showed mammalian cell cytotoxicity with an IC50 value of 5.7 μg.mL−1. Uninfected macrophages treated with melittin increased the production of IL-10, TNF-α, NO and H2O2. Infected melittin-treated macrophages increased IL-12 production, but decreased the levels of IL-10, TNF-α, NO and H2O2. Conclusions The results showed that melittin acts in vitro against promastigotes and intracellular amastigotes of Leishmania (L.) infantum. Furthermore, they can act indirectly on intracellular amastigotes through a macrophage immunomodulatory effect.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Venenos de Abelha
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Leishmania infantum
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Meliteno
Limite:
Animals
Idioma:
En
Revista:
J. venom. anim. toxins incl. trop. dis
Assunto da revista:
TOXICOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
/
Project document
País de afiliação:
Brasil