Monoclonal antibodies against the 43,000 Da glycoprotein from Paracoccidioides brasiliensis modulate laminin-mediated fungal adhesion to epithelial cells and pathogenesis

Monoclonal antibodies against the 43,000 Da glycoprotein from Paracoccidioides brasiliensis modulate laminin-mediated fungal adhesion to epithelial cells and pathogenesis

Autor Gesztesi, J. L. Google Scholar
Puccia, R. Google Scholar
Travassos, L. R. Google Scholar
Vicentini, A. P. Google Scholar
deMoraes, J. Z. Google Scholar
Franco, M. F. Google Scholar
Lopes, J. D. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Resumo The surface glycoprotein gp43, a highly immunogenic component of Paracoccidioides brasiliensis, is used in the serodiagnosis of paracoccidioidomycosis (PCM) and has recently been shown to specifically bind the extracellular matrix protein laminin, Binding to laminin induces the increased adhesion of the fungus to epithelial cells; a hamster testicle infection model has shown that the gp43-dependent binding of fungal cells to laminin enhances their pathogenicity in vivo. We report on the production and characterization of 12 monoclonal antibodies against the gp43 that recognize peptide sequences in the molecule detecting at least three different epitopes as well as different isoforms of this antigen. MAbs interfered in the fungal pathogenicity in vivo either by inhibiting or enhancing granuloma formation and tissue destruction, Results suggest that P. brasiliensis propagules may start infection in man by strongly adhering to human lung cells, Thus, laminin-mediated fungal adhesion to human lung carcinoma (A549) cells was much more intense than to Madin-Darby canine kidney cells (MDCK), indicating differences in binding affinity, Subsequent growth of fungi bound to the lung cells could induce the granulomatous inflammatory reaction characteristic of PCM. Both steps are greatly stimulated by laminin binding in infective cells expressing gp43.
Idioma Inglês
Data de publicação 1996-12-01
Publicado em Hybridoma. Larchmont: Mary Ann Liebert Inc Publ, v. 15, n. 6, p. 415-422, 1996.
ISSN 0272-457X (Sherpa/Romeo, fator de impacto)
Publicador Mary Ann Liebert Inc Publ
Extensão 415-422
Fonte http://dx.doi.org/10.1089/hyb.1996.15.415
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:A1996WB78700003
Endereço permanente http://repositorio.unifesp.br/handle/11600/25646

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