Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis

Autores
Flores, Daniela; Rodriguez, Anabel Elisa; Tomazic, Mariela Luján; Torioni, Susana Marta; Echaide, Ignacio Eduardo; Zamorano, Patricia Ines; Langellotti, Cecilia Ana; Araujo, Flabio Ribeiro de; Rolls, Peter; Schnittger, Leonhard; Florin-Christensen, Mónica
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Surface proteins bound to the cell membrane by glycosylphosphatidylinositol (GPI) anchors are considered essential for the survival of pathogenic protozoans. In the case of the tick-transmitted hemoparasite Babesia bovis, the most virulent causative agent of bovine babesiosis, the GPI-anchored proteome was recently unraveled by an in silico approach. In this work, one of the identified proteins, GASA-1 (GPI-Anchored Surface Antigen-1), was thoroughly characterized. GASA-1 is 179 aa long and has the characteristic features of a GPI-anchored protein, including a signal peptide, a hydrophilic core and a hydrophobic tail that harbors a GPI anchor signal. Transcriptomic analysis shows that it is expressed in pathogenic and attenuated B. bovis strains. Notably, the gasa-1 gene has syntenic counterparts in B. bigemina and B. ovata, which also encode GPI-anchored proteins. This is highly unusual since all piroplasmid GPI-anchored proteins described so far have been found to be species-specific. Sequencing of gasa-1 alleles from B. bovis geographical isolates originating from Argentina, USA, Brazil, Mexico and Australia showed over 98 % identity in both nucleotide and amino acid sequences. A recombinant form of GASA-1 (rGASA-1) was generated in E. coli and anti-rGASA-1 antibodies were raised in mice. Fixed and live immunofluorescence assays showed that GASA-1 is expressed in in vitro cultured B. bovis merozoites and surface-exposed. Moreover, incubation of B. bovis in vitro cultures with anti-GASA-1 antibodies partially, but significantly, reduced erythrocyte invasion, indicating that this protein bears neutralization-sensitive antibody epitopes. Splenocytes of rGASA-1-inoculated mice showed a specific proliferative response when exposed to the recombinant protein, indicating that GASA-1 bears T-cell epitopes. Finally, sera from a group of B. bovis-infected cattle reacted with the recombinant protein, demonstrating that GASA-1 is expressed during natural infection of bovines with B. bovis, and suggesting that it is immunodominant. The high degree of conservation among B. bovis isolates and the presence of syntenic genes in other Babesia species suggest a relevant role of GASA-1 and GASA-1-like proteins for parasite survival, especially considering that, due to their surface location, they are exposed to the selection pressure of the host immune system. The highlighted features of GASA-1 make it an interesting candidate for the development of vaccines against bovine babesiosis.
Instituto de Patobiología
Fil: Flores, Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Rodriguez, Anabel Elisa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Tomazic, Mariela Luján. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Zamorano, Patricia Ines. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; Argentina
Fil: Langellotti, Cecilia Ana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; Argentina
Fil: Araujo, Flabio Ribeiro de. Empresa Brasileira de Pesquisa Agropecuária (Embrapa). Gado de Corte; Brasil
Fil: Rolls, Peter. Tick Fever Centre. Department of Agriculture & Fisheries; Australia
Fil: Schnittger, Leonhard. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Florin-Christensen, Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Flores, Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Tomazic, Mariela Luján. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Schnittger, Leonhard. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Florin-Christensen, Monica. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fuente
Veterinary parasitology 287 : 109275. (Noviembre 2020)
Materia
Babesiosis
Vacuna
Antígenos
Glicosiltransferasas
Babesia Bovis
Vaccines
Antigens
Glycosyltransferases
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/8610
Acceder
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oai_identifier_str oai:localhost:20.500.12123/8610
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network_name_str INTA Digital (INTA)
spelling Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovisFlores, DanielaRodriguez, Anabel ElisaTomazic, Mariela LujánTorioni, Susana MartaEchaide, Ignacio EduardoZamorano, Patricia InesLangellotti, Cecilia AnaAraujo, Flabio Ribeiro deRolls, PeterSchnittger, LeonhardFlorin-Christensen, MónicaBabesiosisVacunaAntígenosGlicosiltransferasasBabesia BovisVaccinesAntigensGlycosyltransferasesSurface proteins bound to the cell membrane by glycosylphosphatidylinositol (GPI) anchors are considered essential for the survival of pathogenic protozoans. In the case of the tick-transmitted hemoparasite Babesia bovis, the most virulent causative agent of bovine babesiosis, the GPI-anchored proteome was recently unraveled by an in silico approach. In this work, one of the identified proteins, GASA-1 (GPI-Anchored Surface Antigen-1), was thoroughly characterized. GASA-1 is 179 aa long and has the characteristic features of a GPI-anchored protein, including a signal peptide, a hydrophilic core and a hydrophobic tail that harbors a GPI anchor signal. Transcriptomic analysis shows that it is expressed in pathogenic and attenuated B. bovis strains. Notably, the gasa-1 gene has syntenic counterparts in B. bigemina and B. ovata, which also encode GPI-anchored proteins. This is highly unusual since all piroplasmid GPI-anchored proteins described so far have been found to be species-specific. Sequencing of gasa-1 alleles from B. bovis geographical isolates originating from Argentina, USA, Brazil, Mexico and Australia showed over 98 % identity in both nucleotide and amino acid sequences. A recombinant form of GASA-1 (rGASA-1) was generated in E. coli and anti-rGASA-1 antibodies were raised in mice. Fixed and live immunofluorescence assays showed that GASA-1 is expressed in in vitro cultured B. bovis merozoites and surface-exposed. Moreover, incubation of B. bovis in vitro cultures with anti-GASA-1 antibodies partially, but significantly, reduced erythrocyte invasion, indicating that this protein bears neutralization-sensitive antibody epitopes. Splenocytes of rGASA-1-inoculated mice showed a specific proliferative response when exposed to the recombinant protein, indicating that GASA-1 bears T-cell epitopes. Finally, sera from a group of B. bovis-infected cattle reacted with the recombinant protein, demonstrating that GASA-1 is expressed during natural infection of bovines with B. bovis, and suggesting that it is immunodominant. The high degree of conservation among B. bovis isolates and the presence of syntenic genes in other Babesia species suggest a relevant role of GASA-1 and GASA-1-like proteins for parasite survival, especially considering that, due to their surface location, they are exposed to the selection pressure of the host immune system. The highlighted features of GASA-1 make it an interesting candidate for the development of vaccines against bovine babesiosis.Instituto de PatobiologíaFil: Flores, Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; ArgentinaFil: Rodriguez, Anabel Elisa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; ArgentinaFil: Tomazic, Mariela Luján. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; ArgentinaFil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; ArgentinaFil: Zamorano, Patricia Ines. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; ArgentinaFil: Langellotti, Cecilia Ana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; ArgentinaFil: Araujo, Flabio Ribeiro de. Empresa Brasileira de Pesquisa Agropecuária (Embrapa). Gado de Corte; BrasilFil: Rolls, Peter. Tick Fever Centre. Department of Agriculture & Fisheries; AustraliaFil: Schnittger, Leonhard. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; ArgentinaFil: Florin-Christensen, Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; ArgentinaFil: Flores, Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Tomazic, Mariela Luján. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Schnittger, Leonhard. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaFil: Florin-Christensen, Monica. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); ArgentinaElsevier2021-01-18T15:19:34Z2021-01-18T15:19:34Z2020-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/8610https://www.sciencedirect.com/science/article/abs/pii/S03044017203025570304-4017https://doi.org/10.1016/j.vetpar.2020.109275Veterinary parasitology 287 : 109275. (Noviembre 2020)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2019-PD-E5-I102-001/2019-PD-E5-I102-001/AR./Desarrollo de vacunas y tecnologías para mejorar las estrategias profilácticas y terapéuticas de las enfermedades que afectan la producción animal y la salud públicainfo:eu-repograntAgreement/INTA/2019-PD-E5-I105-001/2019-PD-E5-I105-001/AR./Patógenos animales: su interacción con el hospedador y el medio ambiente. Impacto en productividad, ecosistemas, sanidad animal y salud pública en el marco “Una Salud”info:eu-repo/semantics/restrictedAccess2025-09-29T13:45:07Zoai:localhost:20.500.12123/8610instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:45:07.657INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
title Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
spellingShingle Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
Flores, Daniela
Babesiosis
Vacuna
Antígenos
Glicosiltransferasas
Babesia Bovis
Vaccines
Antigens
Glycosyltransferases
title_short Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
title_full Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
title_fullStr Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
title_full_unstemmed Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
title_sort Characterization of GASA-1, a new vaccine candidate antigen of Babesia bovis
dc.creator.none.fl_str_mv Flores, Daniela
Rodriguez, Anabel Elisa
Tomazic, Mariela Luján
Torioni, Susana Marta
Echaide, Ignacio Eduardo
Zamorano, Patricia Ines
Langellotti, Cecilia Ana
Araujo, Flabio Ribeiro de
Rolls, Peter
Schnittger, Leonhard
Florin-Christensen, Mónica
author Flores, Daniela
author_facet Flores, Daniela
Rodriguez, Anabel Elisa
Tomazic, Mariela Luján
Torioni, Susana Marta
Echaide, Ignacio Eduardo
Zamorano, Patricia Ines
Langellotti, Cecilia Ana
Araujo, Flabio Ribeiro de
Rolls, Peter
Schnittger, Leonhard
Florin-Christensen, Mónica
author_role author
author2 Rodriguez, Anabel Elisa
Tomazic, Mariela Luján
Torioni, Susana Marta
Echaide, Ignacio Eduardo
Zamorano, Patricia Ines
Langellotti, Cecilia Ana
Araujo, Flabio Ribeiro de
Rolls, Peter
Schnittger, Leonhard
Florin-Christensen, Mónica
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Babesiosis
Vacuna
Antígenos
Glicosiltransferasas
Babesia Bovis
Vaccines
Antigens
Glycosyltransferases
topic Babesiosis
Vacuna
Antígenos
Glicosiltransferasas
Babesia Bovis
Vaccines
Antigens
Glycosyltransferases
dc.description.none.fl_txt_mv Surface proteins bound to the cell membrane by glycosylphosphatidylinositol (GPI) anchors are considered essential for the survival of pathogenic protozoans. In the case of the tick-transmitted hemoparasite Babesia bovis, the most virulent causative agent of bovine babesiosis, the GPI-anchored proteome was recently unraveled by an in silico approach. In this work, one of the identified proteins, GASA-1 (GPI-Anchored Surface Antigen-1), was thoroughly characterized. GASA-1 is 179 aa long and has the characteristic features of a GPI-anchored protein, including a signal peptide, a hydrophilic core and a hydrophobic tail that harbors a GPI anchor signal. Transcriptomic analysis shows that it is expressed in pathogenic and attenuated B. bovis strains. Notably, the gasa-1 gene has syntenic counterparts in B. bigemina and B. ovata, which also encode GPI-anchored proteins. This is highly unusual since all piroplasmid GPI-anchored proteins described so far have been found to be species-specific. Sequencing of gasa-1 alleles from B. bovis geographical isolates originating from Argentina, USA, Brazil, Mexico and Australia showed over 98 % identity in both nucleotide and amino acid sequences. A recombinant form of GASA-1 (rGASA-1) was generated in E. coli and anti-rGASA-1 antibodies were raised in mice. Fixed and live immunofluorescence assays showed that GASA-1 is expressed in in vitro cultured B. bovis merozoites and surface-exposed. Moreover, incubation of B. bovis in vitro cultures with anti-GASA-1 antibodies partially, but significantly, reduced erythrocyte invasion, indicating that this protein bears neutralization-sensitive antibody epitopes. Splenocytes of rGASA-1-inoculated mice showed a specific proliferative response when exposed to the recombinant protein, indicating that GASA-1 bears T-cell epitopes. Finally, sera from a group of B. bovis-infected cattle reacted with the recombinant protein, demonstrating that GASA-1 is expressed during natural infection of bovines with B. bovis, and suggesting that it is immunodominant. The high degree of conservation among B. bovis isolates and the presence of syntenic genes in other Babesia species suggest a relevant role of GASA-1 and GASA-1-like proteins for parasite survival, especially considering that, due to their surface location, they are exposed to the selection pressure of the host immune system. The highlighted features of GASA-1 make it an interesting candidate for the development of vaccines against bovine babesiosis.
Instituto de Patobiología
Fil: Flores, Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Rodriguez, Anabel Elisa. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Tomazic, Mariela Luján. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Torioni, Susana Marta. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Echaide, Ignacio Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Rafaela; Argentina
Fil: Zamorano, Patricia Ines. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; Argentina
Fil: Langellotti, Cecilia Ana. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; Argentina
Fil: Araujo, Flabio Ribeiro de. Empresa Brasileira de Pesquisa Agropecuária (Embrapa). Gado de Corte; Brasil
Fil: Rolls, Peter. Tick Fever Centre. Department of Agriculture & Fisheries; Australia
Fil: Schnittger, Leonhard. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Florin-Christensen, Monica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patobiología; Argentina
Fil: Flores, Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Tomazic, Mariela Luján. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Schnittger, Leonhard. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
Fil: Florin-Christensen, Monica. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
description Surface proteins bound to the cell membrane by glycosylphosphatidylinositol (GPI) anchors are considered essential for the survival of pathogenic protozoans. In the case of the tick-transmitted hemoparasite Babesia bovis, the most virulent causative agent of bovine babesiosis, the GPI-anchored proteome was recently unraveled by an in silico approach. In this work, one of the identified proteins, GASA-1 (GPI-Anchored Surface Antigen-1), was thoroughly characterized. GASA-1 is 179 aa long and has the characteristic features of a GPI-anchored protein, including a signal peptide, a hydrophilic core and a hydrophobic tail that harbors a GPI anchor signal. Transcriptomic analysis shows that it is expressed in pathogenic and attenuated B. bovis strains. Notably, the gasa-1 gene has syntenic counterparts in B. bigemina and B. ovata, which also encode GPI-anchored proteins. This is highly unusual since all piroplasmid GPI-anchored proteins described so far have been found to be species-specific. Sequencing of gasa-1 alleles from B. bovis geographical isolates originating from Argentina, USA, Brazil, Mexico and Australia showed over 98 % identity in both nucleotide and amino acid sequences. A recombinant form of GASA-1 (rGASA-1) was generated in E. coli and anti-rGASA-1 antibodies were raised in mice. Fixed and live immunofluorescence assays showed that GASA-1 is expressed in in vitro cultured B. bovis merozoites and surface-exposed. Moreover, incubation of B. bovis in vitro cultures with anti-GASA-1 antibodies partially, but significantly, reduced erythrocyte invasion, indicating that this protein bears neutralization-sensitive antibody epitopes. Splenocytes of rGASA-1-inoculated mice showed a specific proliferative response when exposed to the recombinant protein, indicating that GASA-1 bears T-cell epitopes. Finally, sera from a group of B. bovis-infected cattle reacted with the recombinant protein, demonstrating that GASA-1 is expressed during natural infection of bovines with B. bovis, and suggesting that it is immunodominant. The high degree of conservation among B. bovis isolates and the presence of syntenic genes in other Babesia species suggest a relevant role of GASA-1 and GASA-1-like proteins for parasite survival, especially considering that, due to their surface location, they are exposed to the selection pressure of the host immune system. The highlighted features of GASA-1 make it an interesting candidate for the development of vaccines against bovine babesiosis.
publishDate 2020
dc.date.none.fl_str_mv 2020-11
2021-01-18T15:19:34Z
2021-01-18T15:19:34Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/8610
https://www.sciencedirect.com/science/article/abs/pii/S0304401720302557
0304-4017
https://doi.org/10.1016/j.vetpar.2020.109275
url http://hdl.handle.net/20.500.12123/8610
https://www.sciencedirect.com/science/article/abs/pii/S0304401720302557
https://doi.org/10.1016/j.vetpar.2020.109275
identifier_str_mv 0304-4017
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repograntAgreement/INTA/2019-PD-E5-I102-001/2019-PD-E5-I102-001/AR./Desarrollo de vacunas y tecnologías para mejorar las estrategias profilácticas y terapéuticas de las enfermedades que afectan la producción animal y la salud pública
info:eu-repograntAgreement/INTA/2019-PD-E5-I105-001/2019-PD-E5-I105-001/AR./Patógenos animales: su interacción con el hospedador y el medio ambiente. Impacto en productividad, ecosistemas, sanidad animal y salud pública en el marco “Una Salud”
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Veterinary parasitology 287 : 109275. (Noviembre 2020)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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