Influence of TLR-2 in the immune response in the infection induced by fungus Sporothrix schenckii

• Autor(a) principal: Negrini, Thais De C. [UNESP]
• Data de Publicação: 2014
• Outros Autores: Ferreira, Lucas S. [UNESP], Arthur, Rodrigo A., Alegranci, Pâmela [UNESP], Placeres, Marisa C. P. [UNESP], Spolidorio, Luis C. [UNESP], Carlos, Iracilda Z. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.3109/08820139.2013.879174; http://hdl.handle.net/11449/227688
• topic: Cytokines; Mice; Sporothrix schenckii; Sporotrichosis; TLR-2

Toll-like receptors (TLRs) play an important role in immunity, since they bind to pathogen surface antigens and initiate the immune response. However, little is known about the role of TLR-2 in the recognition of S. schenckii and in the subsequent immune response. Therefore, the aim of this study was to evaluate the involvement of TLR-2 in the immune response induced by S. schenckii. C57BL/6 mice (WT) and C57BL/6 TLR-2 knockout (TLR-2-/-) were used to evaluate, over a period of 10 weeks of sporotrichotic infection, the influence of TLR-2 over macrophages production of IL-1β, IL-12 and TNF-α, their stimulation level by NO release and the production of IFN-γ, IL-6, IL-17 and TGF-β by spleen cells. The results showed that the production of pro-inflammatory mediators and NO, TLR-2 interference is striking, since its absence completely inhibited it. IL-17 production was independent of TLR-2. The absence of Th1 response in TLR2-/- animals was concomitant with IL-17 production. Therefore, it can be suggested that TLR-2 absence interferes with the course of the infection induced by the fungus S. schenckii. © 2014 Informa Healthcare USA, Inc.