Autor(es):
Barral-Netto, Manoel ; Sohsten, R. L. Von ; Teixeira, M. ; Santos, Washington Luis Conrado dos ; Pompeu, M. L. ; Moreira, R. A. ; Oliveira, J. T. A. ; Cavada, B. S. ; Falcoff, E. ; Barral, Aldina Maria Prado ; Barral-Netto, Manoel ; Sohsten, R. L. Von ; Teixeira, M. ; Santos, Washington Luis Conrado dos ; Pompeu, M. L. ; Moreira, R. A. ; Oliveira, J. T. A. ; Cavada, B. S. ; Falcoff, E. ; Barral, Aldina Maria Prado
Data: 2013
Origem: Oasisbr
Assunto(s): Leishmania amazonensi; Leishmaniasis; Leishmania; Tegumentary leishmaniasis; Experimental leishmaniasis; Canavalia brasiliensis; Interferon-γ
Descrição
Texto completo: acesso restrito. p.237–250
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In vivo administration of Canavalia brasiliensis lectin (at the time of infection, or maintained throughout the infection) reduced the lesions of highly susceptible BALB/c mice infected by Leishmania amazonensis. At the doses used C. brasiliensis lectin (ConBr) does not interfere with penetration or fate of Leishmania in the macrophages in vitro. Since Interferon-γ (IFN-γ) is the major macrophage activating factor, and considered a critical element in the successful immune response against leishmaniasis, we explored its participation in this phenomenon. ConBr either in vivo or in vitro induced IFN-γ production in normal or in leishmania-infected BALB/c mice. However we were unable to change the course of disease by in vivo IFN-γ administration (although IFN-γ preparations were effective in inducing a leishmanicidal effect in vitro on L. amazonensis-infected peritoneal macrophages). Additionally, IFN-γ neutralization with anti-IFN-γ monoclonal antibody did not alter the protection conferred by ConBr administration. These data show that lectin administration in vivo is protective in the otherwise unchecked L. amazonensis infection of BALB/c mice, and suggest that such effect is not mediated by IFN-γ.
