Characterization of virulence profile, protein secretion and immunogenicity of different Sporothrix schenckii sensu stricto isolates compared with S. globosa and S. brasiliensis species

Characterization of virulence profile, protein secretion and immunogenicity of different Sporothrix schenckii sensu stricto isolates compared with S. globosa and S. brasiliensis species

Autor Fernandes, Geisa Ferreira Autor UNIFESP Google Scholar
Santos, Priscila Oliveira dos Autor UNIFESP Google Scholar
Rodrigues, Anderson Messias Autor UNIFESP Google Scholar
Sasaki, Alexandre Augusto Autor UNIFESP Google Scholar
Burger, Eva Google Scholar
Camargo, Zoilo Pires de Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Univ Fed Alfenas
Resumo A comparative study about protein secretion, immunogenicity and virulence was performed in order to characterize and to compare eight Sporothrix schenckii sensu stricto isolates. for virulence characterization, a murine model, based on survival assay and CFU counting was used. S. brasiliensis and S. globosa, a highly virulent and a non-virulent isolates, respectively were used as external controls. Exoantigen profiles showed different secreted molecules; the 46- and 60-kDa molecules were commonly secreted by all three species. the S. schenckii s. str. isolates could be classified as non-virulent or presenting low, medium or high virulence, based on survival times after infection and recovery of viable fungi. the humoral response profiles of mice infected with S. schenckii s. str., S. globosa and S. brasiliensis were heterogeneous; five virulent isolates (S. schenckii s. str., n = 4 and S. brasiliensis, n = 1) had in common the recognition of the 60-kDa molecule by their respective antisera, suggesting that this antigen may be involved in virulence. Furthermore, the 110-kDa molecule was secreted and recognized by antisera from four virulent isolates (S. schenckii s. str., n = 3 and S. brasiliensis, n = 1), so there is a possibility that this molecule is also related to virulence. Our findings reveal different degrees of virulence in S. schenckii s. str. isolates and suggest the correlation of protein secretion and immunogenicity with virulence of S. schenckii complex. These findings provide new insights into the pathogenesis of S. schenckii s. str. and improve the knowledge about immunogenicity and protein profiles in S. schenckii complex.
Palavra-chave Sporothrix schenckii complex
virulence
sporotrichosis
antigens
western blotting
protein secretion
immunogenicity
Idioma Inglês
Financiador Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Número do financiamento FAPESP: 2009/54024-2
Data de publicação 2013-04-01
Publicado em Virulence. Austin: Landes Bioscience, v. 4, n. 3, p. 241-249, 2013.
ISSN 2150-5594 (Sherpa/Romeo, fator de impacto)
Publicador Landes Bioscience
Extensão 241-249
Fonte http://dx.doi.org/10.4161/viru.23112
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000316948000006
Endereço permanente http://repositorio.unifesp.br/handle/11600/36130

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