Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/5818
Title: The terminal portion of leptospiral immunoglobulin-like protein LigA confers protective immunity against lethal infection in the hamster model of leptospirosis (preprint)
Authors: Silva, Éverton Fagonde
Medeiros, Marco Alberto
McBride, Alan John Alexander
Matsunaga, Jim
Esteves, Gabriela S.
Ramos, João G. R.
Santos, Cleiton Silva
Croda, Julio Henrique Rosa
Homma, Akira
Dellagostin, Odir Antonio
Haake, David A.
Reis, Mitermayer Galvão dos
Ko, Albert Icksang
Affilliation: Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Fundação Oswaldo Cruz. Bio-Manguinhos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Veterans Affairs Greater Los Angeles Healthcare System. Los Angeles, CA, United States of America.
Fundação Oswaldo Cruz. Bio-Manguinhos. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Fundação Oswaldo Cruz. Bio-Manguinhos. Rio de Janeiro, RJ, Brasil.
Universidade Federal de Pelotas. Centro de Biotecnologia. Pelotas, RGS, Brasil.
Veterans Affairs Greater Los Angeles Healthcare System. Los Angeles, CA, USA.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Fundação Oswaldo Cruz. Centro de Pesquisas Gonçalo Moniz. Salvador, BA, Brasil.
Abstract: Subunit vaccines are a potential intervention strategy against leptospirosis, which is a major public health problem in developing countries and a veterinary disease in livestock and companion animals worldwide. Leptospiral immunoglobulin-like (Lig) proteins are a family of surface-exposed determinants that have Ig-like repeat domains found in virulence factors such as intimin and invasin. We expressed fragments of the repeat domain regions of LigA and LigB from Leptospira interrogans serovar Copenhageni. Immunization of Golden Syrian hamsters with Lig fragments in Freund's adjuvant induced robust antibody responses against recombinant protein and native protein, as detected by ELISA and immunoblot, respectively. A single fragment, LigANI, which corresponds to the six carboxy-terminal Ig-like repeat domains of the LigA molecule, conferred immunoprotection against mortality (67-100%, P<0.05) in hamsters which received a lethal inoculum of L. interrogans serovar Copenhageni. However, immunization with this fragment did not confer sterilizing immunity. These findings indicate that the carboxy-terminal portion of LigA is an immunoprotective domain and may serve as a vaccine candidate for human and veterinary leptospirosis.
Keywords: Leptospirosis
Subunit vaccine
Leptospiral immunoglobulin-like protein
Recombinant protein
Immunity
Antibodies
Hamsters
DeCS: Proteínas de Bactérias/Imunologia
Vacinas Bacterianas
Modelos Animais de Doenças
Leptospira/Imunologia
Mesocricetus/imunologia
Animais
Issue Date: 2007
Later Version: https://www.arca.fiocruz.br/handle/icict/23765
Citation: SILVA, E. F. et al. The terminal portion of leptospiral immunoglobulin-like protein LigA confers protective immunity against lethal infection in the hamster model of leptospirosis. Vaccine, v. 25, n. 33, p. 6277-6286, Aug. 2007.
ISSN: 0264-410X
Copyright: open access
Revised document: Não
Publication status: Não Publicado
Appears in Collections:Biomanguinhos - Preprint
BA - IGM - Preprint

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