Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/17465 |
Resumo: | Bovine genital campylobacteriosis (BGC) is an important venereal disease, caused by Campylobacter fetus subsp. venerealis and related economic losses since it cause reproductive problems in cattle herds. SapA is a surface protein important for the pathogenesis of this bacterium by presenting antigenic variation and be responsible for the persistence of the infection in bovine genital tract. In order to facilitate the laboratory diagnosis of BGC, which involves labor - intensive procedures for collecting and processing the samples, this study aimed to standardize the production of a recombinant chimeric protein and also evaluate their potential as a tool for enzyme-linked immunosorbent assay (ELISA) for sorological diagnosis of BCG in herds. The conserved region of nine homologous sequences of C. fetus sapA gene publicly available was used to design a chimeric synthetic gene, called sapAN78, with 1587 base pairs. The fragment was cloned into pAE plasmid and expressed in Escherichia coli BL21(DE3) pLysS. The recombinant chimera (≈60 kDa) was obtained as inclusion bodies, solubilized in a buffer containing urea and purified by nickel affinity chromatography (Ni+2). The protein was recognized by Western blotting with monoclonal polyhistidine antibodies and with sera from CGB vaccinated cattle and by Dot blotting using bovine sera and hyperimmune serum produced in rabbits. Indirect ELISA based on the recombinant protein purified has been standardized and tested 219 sera samples from cattle. The sensitivity and specificity of this assay were 90.91% and 89.78%, respectively. Therefore, rSapAn78 has potential as antigen for indirect ELISA for serological diagnosis of C. fetus in cattle. |
id |
UFSM_8c22ac0e8f9e16159c1f37d0500420df |
---|---|
oai_identifier_str |
oai:repositorio.ufsm.br:1/17465 |
network_acronym_str |
UFSM |
network_name_str |
Manancial - Repositório Digital da UFSM |
repository_id_str |
|
spelling |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetusProduction and characterization of a recombinant chimera of surface protein of Campylobacter fetusCampilobacteriose genital bovinaProteína recombinantePurificaçãoBovine genital campylobacteriosisRecombinant proteinPurificationCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIABovine genital campylobacteriosis (BGC) is an important venereal disease, caused by Campylobacter fetus subsp. venerealis and related economic losses since it cause reproductive problems in cattle herds. SapA is a surface protein important for the pathogenesis of this bacterium by presenting antigenic variation and be responsible for the persistence of the infection in bovine genital tract. In order to facilitate the laboratory diagnosis of BGC, which involves labor - intensive procedures for collecting and processing the samples, this study aimed to standardize the production of a recombinant chimeric protein and also evaluate their potential as a tool for enzyme-linked immunosorbent assay (ELISA) for sorological diagnosis of BCG in herds. The conserved region of nine homologous sequences of C. fetus sapA gene publicly available was used to design a chimeric synthetic gene, called sapAN78, with 1587 base pairs. The fragment was cloned into pAE plasmid and expressed in Escherichia coli BL21(DE3) pLysS. The recombinant chimera (≈60 kDa) was obtained as inclusion bodies, solubilized in a buffer containing urea and purified by nickel affinity chromatography (Ni+2). The protein was recognized by Western blotting with monoclonal polyhistidine antibodies and with sera from CGB vaccinated cattle and by Dot blotting using bovine sera and hyperimmune serum produced in rabbits. Indirect ELISA based on the recombinant protein purified has been standardized and tested 219 sera samples from cattle. The sensitivity and specificity of this assay were 90.91% and 89.78%, respectively. Therefore, rSapAn78 has potential as antigen for indirect ELISA for serological diagnosis of C. fetus in cattle.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESA campilobacteriose genital bovina (CGB) é uma importante enfermidade de caráter venéreo, causada por Campylobacter fetus subsp. venerealis e que acarreta perdas econômicas por causar problemas reprodutivos nos rebanhos bovinos. Esse patógeno possui proteínas de superfície (SapA), as quais são consideradas importantes na patogenia desta enfermidade por apresentar variação antigênica e serem responsáveis pela persistência da infecção no trato genital bovino. O diagnóstico laboratorial da CGB envolve procedimentos fastidiosos de colheita de material e de seu processamento. Com o intuito de facilitar as análises laboratoriais, este estudo objetivou a padronização dos processos de produção e caracterização de uma proteína quimérica recombinante. Desenhou-se um gene sintético quimérico, denominado sapAN78 a partir de sequências da Sap de C. fetus disponíveis publicamente. O fragmento foi clonado no plasmídeo pAE e expresso em Escherichia coli BL21(DE3) pLySs. A quimera recombinante de aproximadamente 60 kDa foi obtida como corpos de inclusão, solubilizada em tampão contendo ureia e purificada por cromatografia de afinidade ao níquel (Ni+2). Após a proteína foi submetida à diálise lenta e realizada a sua caracterização. Esta foi reconhecida por Western blot com anticorpo monoclonal anti-polihistidina, por anticorpos presentes no soro de bovinos vacinados para CGB e por Dot blot a rSapAn78 foi reconhecida por soros de bovinos e soro hiperimune produzido em coelho. Assim, expressão e caracterização de uma proteína de superfície na sua forma recombinante para o diagnóstico desta enfermidade torna a análise das amostras mais prática e acessível. Considerando tais resultados, essa nova proteína possui potencial aplicação em métodos menos laboriosos de diagnóstico para a detecção de campilobacteriose em bovinos.Universidade Federal de Santa MariaBrasilMedicina VeterináriaUFSMPrograma de Pós-Graduação em Medicina VeterináriaCentro de Ciências RuraisVargas, Agueda Palmira Castagna dehttp://lattes.cnpq.br/1383126157031968Conceição, Fabricio Rochedohttp://lattes.cnpq.br/9342312279387017Vogel, Fernanda Silveira Flôreshttp://lattes.cnpq.br/9676833435314493Balzan, Cláudia2019-07-16T17:34:03Z2019-07-16T17:34:03Z2015-02-23info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/17465porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2019-07-17T06:02:08Zoai:repositorio.ufsm.br:1/17465Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2019-07-17T06:02:08Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus Production and characterization of a recombinant chimera of surface protein of Campylobacter fetus |
title |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
spellingShingle |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus Balzan, Cláudia Campilobacteriose genital bovina Proteína recombinante Purificação Bovine genital campylobacteriosis Recombinant protein Purification CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
title_short |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
title_full |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
title_fullStr |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
title_full_unstemmed |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
title_sort |
Produção e caracterização de uma quimera recombinante de proteína de superfície de Campylobacter fetus |
author |
Balzan, Cláudia |
author_facet |
Balzan, Cláudia |
author_role |
author |
dc.contributor.none.fl_str_mv |
Vargas, Agueda Palmira Castagna de http://lattes.cnpq.br/1383126157031968 Conceição, Fabricio Rochedo http://lattes.cnpq.br/9342312279387017 Vogel, Fernanda Silveira Flôres http://lattes.cnpq.br/9676833435314493 |
dc.contributor.author.fl_str_mv |
Balzan, Cláudia |
dc.subject.por.fl_str_mv |
Campilobacteriose genital bovina Proteína recombinante Purificação Bovine genital campylobacteriosis Recombinant protein Purification CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
topic |
Campilobacteriose genital bovina Proteína recombinante Purificação Bovine genital campylobacteriosis Recombinant protein Purification CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
description |
Bovine genital campylobacteriosis (BGC) is an important venereal disease, caused by Campylobacter fetus subsp. venerealis and related economic losses since it cause reproductive problems in cattle herds. SapA is a surface protein important for the pathogenesis of this bacterium by presenting antigenic variation and be responsible for the persistence of the infection in bovine genital tract. In order to facilitate the laboratory diagnosis of BGC, which involves labor - intensive procedures for collecting and processing the samples, this study aimed to standardize the production of a recombinant chimeric protein and also evaluate their potential as a tool for enzyme-linked immunosorbent assay (ELISA) for sorological diagnosis of BCG in herds. The conserved region of nine homologous sequences of C. fetus sapA gene publicly available was used to design a chimeric synthetic gene, called sapAN78, with 1587 base pairs. The fragment was cloned into pAE plasmid and expressed in Escherichia coli BL21(DE3) pLysS. The recombinant chimera (≈60 kDa) was obtained as inclusion bodies, solubilized in a buffer containing urea and purified by nickel affinity chromatography (Ni+2). The protein was recognized by Western blotting with monoclonal polyhistidine antibodies and with sera from CGB vaccinated cattle and by Dot blotting using bovine sera and hyperimmune serum produced in rabbits. Indirect ELISA based on the recombinant protein purified has been standardized and tested 219 sera samples from cattle. The sensitivity and specificity of this assay were 90.91% and 89.78%, respectively. Therefore, rSapAn78 has potential as antigen for indirect ELISA for serological diagnosis of C. fetus in cattle. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02-23 2019-07-16T17:34:03Z 2019-07-16T17:34:03Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/17465 |
url |
http://repositorio.ufsm.br/handle/1/17465 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Medicina Veterinária UFSM Programa de Pós-Graduação em Medicina Veterinária Centro de Ciências Rurais |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Brasil Medicina Veterinária UFSM Programa de Pós-Graduação em Medicina Veterinária Centro de Ciências Rurais |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922129098571776 |