Mycopathologia

, Volume 168, Issue 1, pp 1–10

Current Research on the Immune Response to Experimental Sporotrichosis

  • Iracilda Zeppone Carlos
  • Micheli Fernanda Sassá
  • Diana Bridon da Graça Sgarbi
  • Marisa Campos Polesi Placeres
  • Danielle Cardoso Geraldo Maia
Article

DOI: 10.1007/s11046-009-9190-z

Cite this article as:
Carlos, I.Z., Sassá, M.F., da Graça Sgarbi, D.B. et al. Mycopathologia (2009) 168: 1. doi:10.1007/s11046-009-9190-z

Abstract

Sporotrichosis is often manifested as a chronic granulomatous infection and the monocytes/macrophages play a central role in the host defense system. Surface components of Sporothrix schenckii have been characterized and suggestions have been made as to their possible role in pathogenicity. Ergosterol peroxide, cell-wall compounds (alkali-insoluble fraction-F1 and lipid extract-LEY), and exoantigen from the yeast form of the fungus have been characterized as virulence factors, activating both innate, by cytotoxins linked to the activation of reactive oxygen and nitrogen species (H2O2 and NO), and adaptive immune response to produce cytokines Th1 and Th2 profile. In this study, preliminary results have demonstrated that, in systemic sporotrichosis, TLR-4 triggers the innate immune response, activating an oxidative burst. These data represent the first report of the participation of TLR-4 in murine sporotrichosis, in the presence of lipids from the cell wall of S. schenckii. These results taken together may open new perspectives of study leading to an antifungal agent that could be used to benefit the entire population.

Keywords

Sporothrix schenckiiSystemic infectionCytokinesNitric oxideHydrogen peroxideTLR-4Th1/Th2 response

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Iracilda Zeppone Carlos
    • 1
  • Micheli Fernanda Sassá
    • 1
  • Diana Bridon da Graça Sgarbi
    • 2
  • Marisa Campos Polesi Placeres
    • 1
  • Danielle Cardoso Geraldo Maia
    • 1
  1. 1.Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara, Rua Expedicionários do Brasil 1621Universidade Paulista—UNESP, Júlio Mesquita FilhoAraraquaraBrazil
  2. 2.Departamento de Microbiologia e Parasitologia, Instituto BiomédicoUniversidade Federal FluminenseNiteroiBrazil