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Tipo do documento: Artigo
Título: Antigen-specific T-cell responses of leprosy patients
Autor: Duthie, Malcolm S.
Goto, Wakako
Ireton, Greg C.
Reece, Stephen T.
Sampaio, Lucas Henrique Ferreira
Grassi, Adriano Badotti
Sousa, Ana Lúcia Osório Maroccolo de
Martelli, Celina M. T.
Stefani, Mariane Martins de Araújo
Reed, Steven G.
Abstract: The identification of human T-cell antigens of Mycobacterium leprae could improve treatment and help to disrupt the transmission of leprosy by directing diagnosis and vaccine programs. This study screened a panel of M. leprae recombinant proteins for T-cell recall responses, measured by gamma interferon (IFN- ) produc-tion, among leprosy patients. After initial studies using peripheral blood mononuclear cells from leprosy patients, we transitioned our studies to simple whole-blood assays (WBA), which are more applicable in field or clinical settings. T-cell responses generated in WBA using blood from individuals in Goiaˆnia, Brazil, demonstrated that several M. leprae antigens (ML0276, ML0840, ML1623, ML2044, and 46f) elicited >0.5 IU/ml IFN- , and these proteins were classified as immunogenic and leprosy specific. Several of these individual antigens were recognized by cells from >60% of Brazilian paucibacillary (PB) leprosy patients, and ML0276, ML0840, ML1623, and 46f complemented each other such that 82% of PB patients had strong (>1.25 IU/ml IFN- ) responses to at least one of these proteins. These proteins were also recognized by cells from a significant proportion of the household contacts of multibacillary leprosy patients, but in contrast, few responses were observed in active tuberculosis patients or healthy control groups from areas of endemicity. Our results indicate several potential candidate antigens which may be useful for either leprosy diagnosis or vaccination and demonstrate the utility of leprosy WBA that can be applied broadly in clinical or field settings.
País: Estados unidos
Unidade acadêmica: Instituto de Patologia Tropical e Saúde Pública - IPTSP (RG)
Citação: DUTHIE, Malcolm S. et al. Antigen-specific T-cell responses of leprosy patients. Clinical and Vaccine Immunology, Washington, v. 15, n. 11, p. 1659-1665, 2008.
Tipo de acesso: Acesso Aberto
Identificador do documento: 10.1128/CVI.00234-08
Identificador do documento: 10.1128/CVI.00234-08
Data de publicação: Nov-2008
Aparece nas coleções:IPTSP - Artigos publicados em periódicos

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