Disruption of antigenic variation is crucial for effective parasite vaccine

Autores
Rivero, Fernando David; Saura, Alicia; Prucca, Cesar German; Carranza, Pedro Gabriel; Torri, Alessandro; Lujan, Hugo Daniel
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Giardia lamblia is a human intestinal pathogen. Like many protozoan microorganisms, Giardia undergoes antigenic variation, a mechanism assumed to allow parasites to evade the host's immune response, producing chronic and/or recurrent infections. Recently, we found that the mechanism controlling variant-specific surface protein (VSP) switching in Giardia involves components of the RNA interference machinery and that disruption of this pathway generates trophozoites simultaneously expressing many VSPs. Here we use these altered trophozoites to determine the role of antigenic variation in a gerbil model of giardiasis. Our results show that either primary infection with trophozoites simultaneously expressing many VSPs or immunization with purified VSPs from the transgenic cells protects gerbils from subsequent Giardia infections. These results constitute, to our knowledge, the first experimental evidence that antigenic variation is essential for parasite survival within hosts and that artificial disruption of this mechanism might be useful in generating vaccines against major pathogens that show similar behavior.
Fil: Rivero, Fernando David. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Saura, Alicia. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Prucca, Cesar German. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Carranza, Pedro Gabriel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Torri, Alessandro. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Lujan, Hugo Daniel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Materia
VACCINE
ANTIGENIC VARIATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/130493
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/130493
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Disruption of antigenic variation is crucial for effective parasite vaccineRivero, Fernando DavidSaura, AliciaPrucca, Cesar GermanCarranza, Pedro GabrielTorri, AlessandroLujan, Hugo DanielVACCINEANTIGENIC VARIATIONhttps://purl.org/becyt/ford/3.3https://purl.org/becyt/ford/3Giardia lamblia is a human intestinal pathogen. Like many protozoan microorganisms, Giardia undergoes antigenic variation, a mechanism assumed to allow parasites to evade the host's immune response, producing chronic and/or recurrent infections. Recently, we found that the mechanism controlling variant-specific surface protein (VSP) switching in Giardia involves components of the RNA interference machinery and that disruption of this pathway generates trophozoites simultaneously expressing many VSPs. Here we use these altered trophozoites to determine the role of antigenic variation in a gerbil model of giardiasis. Our results show that either primary infection with trophozoites simultaneously expressing many VSPs or immunization with purified VSPs from the transgenic cells protects gerbils from subsequent Giardia infections. These results constitute, to our knowledge, the first experimental evidence that antigenic variation is essential for parasite survival within hosts and that artificial disruption of this mechanism might be useful in generating vaccines against major pathogens that show similar behavior.Fil: Rivero, Fernando David. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Saura, Alicia. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Prucca, Cesar German. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Carranza, Pedro Gabriel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Torri, Alessandro. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Lujan, Hugo Daniel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaNature Publishing Group2010-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/130493Rivero, Fernando David; Saura, Alicia; Prucca, Cesar German; Carranza, Pedro Gabriel; Torri, Alessandro; et al.; Disruption of antigenic variation is crucial for effective parasite vaccine; Nature Publishing Group; Nature Medicine; 16; 5; 5-2010; 551-5571078-8956CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/nm.2141info:eu-repo/semantics/altIdentifier/doi/10.1038/nm.2141info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:42Zoai:ri.conicet.gov.ar:11336/130493instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:22:42.759CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Disruption of antigenic variation is crucial for effective parasite vaccine
title Disruption of antigenic variation is crucial for effective parasite vaccine
spellingShingle Disruption of antigenic variation is crucial for effective parasite vaccine
Rivero, Fernando David
VACCINE
ANTIGENIC VARIATION
title_short Disruption of antigenic variation is crucial for effective parasite vaccine
title_full Disruption of antigenic variation is crucial for effective parasite vaccine
title_fullStr Disruption of antigenic variation is crucial for effective parasite vaccine
title_full_unstemmed Disruption of antigenic variation is crucial for effective parasite vaccine
title_sort Disruption of antigenic variation is crucial for effective parasite vaccine
dc.creator.none.fl_str_mv Rivero, Fernando David
Saura, Alicia
Prucca, Cesar German
Carranza, Pedro Gabriel
Torri, Alessandro
Lujan, Hugo Daniel
author Rivero, Fernando David
author_facet Rivero, Fernando David
Saura, Alicia
Prucca, Cesar German
Carranza, Pedro Gabriel
Torri, Alessandro
Lujan, Hugo Daniel
author_role author
author2 Saura, Alicia
Prucca, Cesar German
Carranza, Pedro Gabriel
Torri, Alessandro
Lujan, Hugo Daniel
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv VACCINE
ANTIGENIC VARIATION
topic VACCINE
ANTIGENIC VARIATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.3
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv Giardia lamblia is a human intestinal pathogen. Like many protozoan microorganisms, Giardia undergoes antigenic variation, a mechanism assumed to allow parasites to evade the host's immune response, producing chronic and/or recurrent infections. Recently, we found that the mechanism controlling variant-specific surface protein (VSP) switching in Giardia involves components of the RNA interference machinery and that disruption of this pathway generates trophozoites simultaneously expressing many VSPs. Here we use these altered trophozoites to determine the role of antigenic variation in a gerbil model of giardiasis. Our results show that either primary infection with trophozoites simultaneously expressing many VSPs or immunization with purified VSPs from the transgenic cells protects gerbils from subsequent Giardia infections. These results constitute, to our knowledge, the first experimental evidence that antigenic variation is essential for parasite survival within hosts and that artificial disruption of this mechanism might be useful in generating vaccines against major pathogens that show similar behavior.
Fil: Rivero, Fernando David. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Saura, Alicia. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Prucca, Cesar German. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Carranza, Pedro Gabriel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Torri, Alessandro. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Fil: Lujan, Hugo Daniel. Universidad Nacional de Córdoba. Facultad de Medicina. Cátedra de Bioquímica y Biología Molecular; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
description Giardia lamblia is a human intestinal pathogen. Like many protozoan microorganisms, Giardia undergoes antigenic variation, a mechanism assumed to allow parasites to evade the host's immune response, producing chronic and/or recurrent infections. Recently, we found that the mechanism controlling variant-specific surface protein (VSP) switching in Giardia involves components of the RNA interference machinery and that disruption of this pathway generates trophozoites simultaneously expressing many VSPs. Here we use these altered trophozoites to determine the role of antigenic variation in a gerbil model of giardiasis. Our results show that either primary infection with trophozoites simultaneously expressing many VSPs or immunization with purified VSPs from the transgenic cells protects gerbils from subsequent Giardia infections. These results constitute, to our knowledge, the first experimental evidence that antigenic variation is essential for parasite survival within hosts and that artificial disruption of this mechanism might be useful in generating vaccines against major pathogens that show similar behavior.
publishDate 2010
dc.date.none.fl_str_mv 2010-05
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/11336/130493
Rivero, Fernando David; Saura, Alicia; Prucca, Cesar German; Carranza, Pedro Gabriel; Torri, Alessandro; et al.; Disruption of antigenic variation is crucial for effective parasite vaccine; Nature Publishing Group; Nature Medicine; 16; 5; 5-2010; 551-557
1078-8956
CONICET Digital
CONICET
url http://hdl.handle.net/11336/130493
identifier_str_mv Rivero, Fernando David; Saura, Alicia; Prucca, Cesar German; Carranza, Pedro Gabriel; Torri, Alessandro; et al.; Disruption of antigenic variation is crucial for effective parasite vaccine; Nature Publishing Group; Nature Medicine; 16; 5; 5-2010; 551-557
1078-8956
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/nm.2141
info:eu-repo/semantics/altIdentifier/doi/10.1038/nm.2141
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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