Inibição da replicação do vírus da dengue em células de mamíferos
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/15748 https://doi.org/10.14393/ufu.te.2014.79 |
Resumo: | Dengue is the most important mosquito-borne viral disease in tropical and subtropical areas and has become a global threat affecting around 100 countries in the world. Dengue virus infection can be manifested by the self-limited febrile illness known as dengue fever (DF) or by a severe complication caused by the hemorrhagic fever (DHF) or dengue shock syndrome (DSS). Although, much research has been done in Dengue, currently, there is no licensed antiviral agent to defend against the dengue. Thus, development of therapeutic strategies is needed to fight against the virus. In this study we selected by Phage Display an antibody fragment capable to recognize the viral envelop protein and viral structural protein NS1 and inhibit the virus replication. Envelope proteins are on the surface of the dengue virion and play a key role in cell entry; the structure of the protein will affect the way that the virus can interact with the host cell. Given their key role in host cell entry, antiviral mechanisms that target E proteins has been proposed by many research. NS1 is a versatile nonstructural glycoprotein that is expressed on the cell surface and secreted into the extracellular space. The intracellular NS1 has been associated with early steps of viral replication, since it can be found co-localized together dsRNA and other nonstructural protein like NS3 and NS5. Furthermore, we development an approach to degrade the NS1 and viral envelop protein when scFv is fused to the SEL1L molecule (scFv viraldegradin). SEL1L is a component of HRD1 complex, which is involved on the Quality Control protein process of the endoplasmatic reticulum (ER). This molecule (SEL1L) is able to recognize and to translocate protein with misfolded luminal domains to proteasome. After three round of selection, selected cDNAs encoding antibody fragments (scFv) were subcloned into an expression vector in mammalian cells to produce scFv in soluble form or to produce scFv fused to the SEL1L molecule (scFv viral-degradin). In our study for study of scFv against NS1, we performed immunofluorescence to co-localize the soluble scFv with NS1 at the infected cell. In addition to we, also, performed Western blot to verify the specific degradation and qPCR to quantify the new production of viral particle after the incubated with our soluble scFv and scFv viral-degradin. Our results showed that the soluble antibody scFv co-localizes with NS1 inside the cell, probably in the viral replication complex, and it is able to block the viral replication in more than 90%. Moreover, the scFv viral-degradin degraded the specific molecule (NS1) and it was, also, able to inhibit the new viral particle production in more than 90%. Furthermore, we also verified that scFv against viral envelope protein was able to block the viral replication in more than 90% in soluble scFv and fused in SEL1L. Therefore, this soluble scFv and scFv viral-degradin may be the potential tools to combat dengue virus replication. |
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2016-06-22T18:43:28Z2014-12-052016-06-22T18:43:28Z2014-07-28FUJIMURA, Patrícia Tiemi. Inibição da replicação do vírus da dengue em células de mamíferos. 2014. 115 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.te.2014.79https://repositorio.ufu.br/handle/123456789/15748https://doi.org/10.14393/ufu.te.2014.79Dengue is the most important mosquito-borne viral disease in tropical and subtropical areas and has become a global threat affecting around 100 countries in the world. Dengue virus infection can be manifested by the self-limited febrile illness known as dengue fever (DF) or by a severe complication caused by the hemorrhagic fever (DHF) or dengue shock syndrome (DSS). Although, much research has been done in Dengue, currently, there is no licensed antiviral agent to defend against the dengue. Thus, development of therapeutic strategies is needed to fight against the virus. In this study we selected by Phage Display an antibody fragment capable to recognize the viral envelop protein and viral structural protein NS1 and inhibit the virus replication. Envelope proteins are on the surface of the dengue virion and play a key role in cell entry; the structure of the protein will affect the way that the virus can interact with the host cell. Given their key role in host cell entry, antiviral mechanisms that target E proteins has been proposed by many research. NS1 is a versatile nonstructural glycoprotein that is expressed on the cell surface and secreted into the extracellular space. The intracellular NS1 has been associated with early steps of viral replication, since it can be found co-localized together dsRNA and other nonstructural protein like NS3 and NS5. Furthermore, we development an approach to degrade the NS1 and viral envelop protein when scFv is fused to the SEL1L molecule (scFv viraldegradin). SEL1L is a component of HRD1 complex, which is involved on the Quality Control protein process of the endoplasmatic reticulum (ER). This molecule (SEL1L) is able to recognize and to translocate protein with misfolded luminal domains to proteasome. After three round of selection, selected cDNAs encoding antibody fragments (scFv) were subcloned into an expression vector in mammalian cells to produce scFv in soluble form or to produce scFv fused to the SEL1L molecule (scFv viral-degradin). In our study for study of scFv against NS1, we performed immunofluorescence to co-localize the soluble scFv with NS1 at the infected cell. In addition to we, also, performed Western blot to verify the specific degradation and qPCR to quantify the new production of viral particle after the incubated with our soluble scFv and scFv viral-degradin. Our results showed that the soluble antibody scFv co-localizes with NS1 inside the cell, probably in the viral replication complex, and it is able to block the viral replication in more than 90%. Moreover, the scFv viral-degradin degraded the specific molecule (NS1) and it was, also, able to inhibit the new viral particle production in more than 90%. Furthermore, we also verified that scFv against viral envelope protein was able to block the viral replication in more than 90% in soluble scFv and fused in SEL1L. Therefore, this soluble scFv and scFv viral-degradin may be the potential tools to combat dengue virus replication.CAPÍTULO II: Dengue é uma doença arboviral de grande importância para a saúde pública. O seu principal vetor de transmissão é o mosquito!Aedes aegypti, que se desenvolve em áreas tropicais e subtropicais. Apesar de não parecer agressiva, a dengue pode originar o aparecimento de hemorragia, evoluindo para um quadro de febre hemorrágica ou síndrome do choque hemorrágica. Os principais sintomas da doença hemorrágica é o aparecimento de sangramentos e queda de pressão arterial que pode levar à morte quando mal tratada. Devido à sua gravidade, a melhor maneira de se evitar a infecção é tomando atitudes preventivas e impedindo a reprodução do mosquito. A fim de se combater a disseminação da doença, muitas vacinas têm sido desenvolvidas nas últimas décadas baseada em vírus inativados, vírus atenuados quiméricos, proteínas recombinantes e vacinas de DNA, contudo, ainda não há uma terapia antiviral eficiente para combater o vírus da dengue. Assim, neste trabalho, selecionaramse fragmentos de anticorpos por Phage Display capazes de reconhecerem a proteína do envelope viral e NS1 do vírus da dengue. A região codificante o anticorpo advindo do pComb3X foi subclonado em um vetor de expressão em células de mamífero. Os clones celulares transfectados mostram-se capazes de diminuir em mais de 90% o título de replicação do vírus da dengue sorotipo 1 após 1 e 3 dias de infecção., e pelo menos 78% do título do vírus no sorotipo 2 após um dia de infecção. CAPÍTULO III: A dengue é uma doença arboviral endêmica em vários países tropicais. Embora muitos esforços têm sido feitos para a produção de vacinas imunogênicas mais eficientes para os quatro sorotipos virais, alta taxa de erro durante a replicação do genoma de RNA viral possibilita uma maior resistência a terapias virais. Devido a falta de terapias e vacinas eficazes este estudo desenvolveu um mecanismo de degradação específica contra proteínas do vírus da dengue. Os resultados mostraram que o sistema diminuiu significativamente a produção da proteína E do envelope viral e a molécula de NS1, inibindo, assim, aproximadamente 90% da replicação viral após 24 e 72 horas de infecção com o vírus da dengue tipo 1. Além disso, o mecanismo também mostrou-se eficiente para o combate do vírus da dengue tipo 2. Este sistema pode ser uma alternativa para a terapia da dengue ou na construção de vetores incapazes de transmitir o vírus.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorDoutor em Genética e Bioquímicaapplication/pdfporUniversidade Federal de UberlândiaPrograma de Pós-graduação em Genética e BioquímicaUFUBRCiências BiológicasDengueNS1SCFvPhage DisplayInibição da replicaçãoTerapia antiviralCNPQ::CIENCIAS BIOLOGICAS::GENETICAInibição da replicação do vírus da dengue em células de mamíferosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisVecchi, Larahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4478225A5Ueira-Vieira, Carloshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706664A7Yokosawa, Jonnyhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723270U5Capurro-guimarães, Margareth de Larahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792671J1Bonaldo, Myrna Cristinahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783773U0Nascimento, Rafaelhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4758708T0http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4284187P9Fujimura, Patrícia Tiemi81763408d6753981-8e41-42fb-9dfa-f52cb5852ff1info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFUTHUMBNAILInibicaoReplicacaoVirus_parte 1.pdf.jpgInibicaoReplicacaoVirus_parte 1.pdf.jpgGenerated Thumbnailimage/jpeg1266https://repositorio.ufu.br/bitstream/123456789/15748/7/InibicaoReplicacaoVirus_parte%201.pdf.jpg71397ebe40291520df68d749539313eeMD57InibicaoReplicacaoVirus_parte 2.pdf.jpgInibicaoReplicacaoVirus_parte 2.pdf.jpgGenerated Thumbnailimage/jpeg1106https://repositorio.ufu.br/bitstream/123456789/15748/8/InibicaoReplicacaoVirus_parte%202.pdf.jpg99e16b85d77c7735ca74aa18d8b9fb1aMD58FichaPatriciaTiemi.pdf.jpgFichaPatriciaTiemi.pdf.jpgGenerated Thumbnailimage/jpeg1190https://repositorio.ufu.br/bitstream/123456789/15748/9/FichaPatriciaTiemi.pdf.jpg2f32634f1526abcfe6c5f72de27a285bMD59ORIGINALInibicaoReplicacaoVirus_parte 1.pdfapplication/pdf4507581https://repositorio.ufu.br/bitstream/123456789/15748/1/InibicaoReplicacaoVirus_parte%201.pdf2ec9b0b68cf27e2b70307f7650277b1cMD51InibicaoReplicacaoVirus_parte 2.pdfapplication/pdf8986187https://repositorio.ufu.br/bitstream/123456789/15748/2/InibicaoReplicacaoVirus_parte%202.pdf33d56c7d5547e6e6ccadfe77ae377351MD52FichaPatriciaTiemi.pdfapplication/pdf11970https://repositorio.ufu.br/bitstream/123456789/15748/3/FichaPatriciaTiemi.pdf0114e389bfd6ea8daa22c7f23c13bb9fMD53TEXTInibicaoReplicacaoVirus_parte 1.pdf.txtInibicaoReplicacaoVirus_parte 1.pdf.txtExtracted texttext/plain95353https://repositorio.ufu.br/bitstream/123456789/15748/4/InibicaoReplicacaoVirus_parte%201.pdf.txtd989dd819637599e9dedf28df8a62927MD54InibicaoReplicacaoVirus_parte 2.pdf.txtInibicaoReplicacaoVirus_parte 2.pdf.txtExtracted texttext/plain104695https://repositorio.ufu.br/bitstream/123456789/15748/5/InibicaoReplicacaoVirus_parte%202.pdf.txt0ffc0e92f4f8e51ac6ea881ae859a6a1MD55FichaPatriciaTiemi.pdf.txtFichaPatriciaTiemi.pdf.txtExtracted texttext/plain826https://repositorio.ufu.br/bitstream/123456789/15748/6/FichaPatriciaTiemi.pdf.txt7dd654c422710c258c1d5add124502beMD56123456789/157482021-11-03 09:09:02.461oai:repositorio.ufu.br:123456789/15748Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2021-11-03T12:09:02Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.por.fl_str_mv |
Inibição da replicação do vírus da dengue em células de mamíferos |
title |
Inibição da replicação do vírus da dengue em células de mamíferos |
spellingShingle |
Inibição da replicação do vírus da dengue em células de mamíferos Fujimura, Patrícia Tiemi Dengue NS1 SCFv Phage Display Inibição da replicação Terapia antiviral CNPQ::CIENCIAS BIOLOGICAS::GENETICA |
title_short |
Inibição da replicação do vírus da dengue em células de mamíferos |
title_full |
Inibição da replicação do vírus da dengue em células de mamíferos |
title_fullStr |
Inibição da replicação do vírus da dengue em células de mamíferos |
title_full_unstemmed |
Inibição da replicação do vírus da dengue em células de mamíferos |
title_sort |
Inibição da replicação do vírus da dengue em células de mamíferos |
author |
Fujimura, Patrícia Tiemi |
author_facet |
Fujimura, Patrícia Tiemi |
author_role |
author |
dc.contributor.advisor-co1.fl_str_mv |
Vecchi, Lara |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4478225A5 |
dc.contributor.advisor1.fl_str_mv |
Ueira-Vieira, Carlos |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706664A7 |
dc.contributor.referee1.fl_str_mv |
Yokosawa, Jonny |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723270U5 |
dc.contributor.referee2.fl_str_mv |
Capurro-guimarães, Margareth de Lara |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792671J1 |
dc.contributor.referee3.fl_str_mv |
Bonaldo, Myrna Cristina |
dc.contributor.referee3Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783773U0 |
dc.contributor.referee4.fl_str_mv |
Nascimento, Rafael |
dc.contributor.referee4Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4758708T0 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4284187P9 |
dc.contributor.author.fl_str_mv |
Fujimura, Patrícia Tiemi |
contributor_str_mv |
Vecchi, Lara Ueira-Vieira, Carlos Yokosawa, Jonny Capurro-guimarães, Margareth de Lara Bonaldo, Myrna Cristina Nascimento, Rafael |
dc.subject.por.fl_str_mv |
Dengue NS1 SCFv Phage Display Inibição da replicação Terapia antiviral |
topic |
Dengue NS1 SCFv Phage Display Inibição da replicação Terapia antiviral CNPQ::CIENCIAS BIOLOGICAS::GENETICA |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS BIOLOGICAS::GENETICA |
description |
Dengue is the most important mosquito-borne viral disease in tropical and subtropical areas and has become a global threat affecting around 100 countries in the world. Dengue virus infection can be manifested by the self-limited febrile illness known as dengue fever (DF) or by a severe complication caused by the hemorrhagic fever (DHF) or dengue shock syndrome (DSS). Although, much research has been done in Dengue, currently, there is no licensed antiviral agent to defend against the dengue. Thus, development of therapeutic strategies is needed to fight against the virus. In this study we selected by Phage Display an antibody fragment capable to recognize the viral envelop protein and viral structural protein NS1 and inhibit the virus replication. Envelope proteins are on the surface of the dengue virion and play a key role in cell entry; the structure of the protein will affect the way that the virus can interact with the host cell. Given their key role in host cell entry, antiviral mechanisms that target E proteins has been proposed by many research. NS1 is a versatile nonstructural glycoprotein that is expressed on the cell surface and secreted into the extracellular space. The intracellular NS1 has been associated with early steps of viral replication, since it can be found co-localized together dsRNA and other nonstructural protein like NS3 and NS5. Furthermore, we development an approach to degrade the NS1 and viral envelop protein when scFv is fused to the SEL1L molecule (scFv viraldegradin). SEL1L is a component of HRD1 complex, which is involved on the Quality Control protein process of the endoplasmatic reticulum (ER). This molecule (SEL1L) is able to recognize and to translocate protein with misfolded luminal domains to proteasome. After three round of selection, selected cDNAs encoding antibody fragments (scFv) were subcloned into an expression vector in mammalian cells to produce scFv in soluble form or to produce scFv fused to the SEL1L molecule (scFv viral-degradin). In our study for study of scFv against NS1, we performed immunofluorescence to co-localize the soluble scFv with NS1 at the infected cell. In addition to we, also, performed Western blot to verify the specific degradation and qPCR to quantify the new production of viral particle after the incubated with our soluble scFv and scFv viral-degradin. Our results showed that the soluble antibody scFv co-localizes with NS1 inside the cell, probably in the viral replication complex, and it is able to block the viral replication in more than 90%. Moreover, the scFv viral-degradin degraded the specific molecule (NS1) and it was, also, able to inhibit the new viral particle production in more than 90%. Furthermore, we also verified that scFv against viral envelope protein was able to block the viral replication in more than 90% in soluble scFv and fused in SEL1L. Therefore, this soluble scFv and scFv viral-degradin may be the potential tools to combat dengue virus replication. |
publishDate |
2014 |
dc.date.available.fl_str_mv |
2014-12-05 2016-06-22T18:43:28Z |
dc.date.issued.fl_str_mv |
2014-07-28 |
dc.date.accessioned.fl_str_mv |
2016-06-22T18:43:28Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/doctoralThesis |
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dc.identifier.citation.fl_str_mv |
FUJIMURA, Patrícia Tiemi. Inibição da replicação do vírus da dengue em células de mamíferos. 2014. 115 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.te.2014.79 |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufu.br/handle/123456789/15748 |
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https://doi.org/10.14393/ufu.te.2014.79 |
identifier_str_mv |
FUJIMURA, Patrícia Tiemi. Inibição da replicação do vírus da dengue em células de mamíferos. 2014. 115 f. Tese (Doutorado em Ciências Biológicas) - Universidade Federal de Uberlândia, Uberlândia, 2014. DOI https://doi.org/10.14393/ufu.te.2014.79 |
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https://repositorio.ufu.br/handle/123456789/15748 https://doi.org/10.14393/ufu.te.2014.79 |
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Universidade Federal de Uberlândia |
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UFU |
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BR |
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Ciências Biológicas |
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Universidade Federal de Uberlândia |
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