Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum

Detalhes bibliográficos
Autor(a) principal: Freire, Fernanda Karoline Almeida
Data de Publicação: 2023
Outros Autores: Campos, Guilherme Barreto, Oliveira, Caline Teixeira
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFBA
Texto Completo: https://repositorio.ufba.br/handle/ri/39741
Resumo: Aborto é a interrupção da gestação antes da 22a semana gestacional, ou o feto pesando menos de 500g. Podendo ser de maneira habitual ou induzida, possuindo uma multicausalidade, que englobam infecções genitais. As infecções do trato genital ascendem para cavidade uterina sendo responsável por 15% dos abortos precoces e 66% nos abortos tardios. As respostas inflamatórias exacerbadas oriundas do processo infeccioso acometem a homeostase gestacional, contribuindo com o perfil pró- inflamatório e modificando o estado oxidativo. Este trabalho teve como objetivo principal avaliar os marcadores de estresse oxidativo no contexto do aborto espontâneo associadoa infecção por Ureaplasma parvum. Foram utilizadas amostras biológicas de tecido placentário de mulheres que evoluíram com aborto espontâneo e mulheres que tiveram parto a termo. Ao avaliar os marcadores de peroxidação lipídica e carbonilação proteica, foram identificados níveis elevados de (TBARS e proteína carbonilada) no aborto, bem como o aumento da atividade antioxidante pela CAT, e redução da atividade da GPx, além de uma resposta não alterada da SOD. Entretanto, o perfil da peroxidação lipídica foi acentuado no aborto infectado por UP. E os níveis da GPx foram reduzidos no aborto infectado por UP, comparado ao controle infectado, enquanto SOD e CAT não apresentaram diferenças; a razão SOD/CAT esteve reduzida e SOD/GPx elevada nos grupos de UP, comparado aos sem infecção. Na razão da expressão gênica, o aborto infectado contribuiu com a redução de Mn SOD/GPx além de reduzir a expressão de CuZn SOD/GPx e Mn SOD/GPx no grupo aborto e controle infectado, comparado aos grupos sem infecção. Em seguida, houve aumento dos níveis de nitrito no aborto infectado por UP. Este trabalho demonstrou que a infecção por UP pode contribuir para alterar o perfil oxidante, sugerindo, assim, que o desequilíbrio do estresse oxidativo pode contribuir com a ocorrência do aborto espontâneo associado a infecção bacteriana.
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spelling 2024-08-06T11:23:22Z2024-08-06T11:23:22Z2023-07-27FREIRE, Fernanda Karoline Almeidahttps://repositorio.ufba.br/handle/ri/39741Aborto é a interrupção da gestação antes da 22a semana gestacional, ou o feto pesando menos de 500g. Podendo ser de maneira habitual ou induzida, possuindo uma multicausalidade, que englobam infecções genitais. As infecções do trato genital ascendem para cavidade uterina sendo responsável por 15% dos abortos precoces e 66% nos abortos tardios. As respostas inflamatórias exacerbadas oriundas do processo infeccioso acometem a homeostase gestacional, contribuindo com o perfil pró- inflamatório e modificando o estado oxidativo. Este trabalho teve como objetivo principal avaliar os marcadores de estresse oxidativo no contexto do aborto espontâneo associadoa infecção por Ureaplasma parvum. Foram utilizadas amostras biológicas de tecido placentário de mulheres que evoluíram com aborto espontâneo e mulheres que tiveram parto a termo. Ao avaliar os marcadores de peroxidação lipídica e carbonilação proteica, foram identificados níveis elevados de (TBARS e proteína carbonilada) no aborto, bem como o aumento da atividade antioxidante pela CAT, e redução da atividade da GPx, além de uma resposta não alterada da SOD. Entretanto, o perfil da peroxidação lipídica foi acentuado no aborto infectado por UP. E os níveis da GPx foram reduzidos no aborto infectado por UP, comparado ao controle infectado, enquanto SOD e CAT não apresentaram diferenças; a razão SOD/CAT esteve reduzida e SOD/GPx elevada nos grupos de UP, comparado aos sem infecção. Na razão da expressão gênica, o aborto infectado contribuiu com a redução de Mn SOD/GPx além de reduzir a expressão de CuZn SOD/GPx e Mn SOD/GPx no grupo aborto e controle infectado, comparado aos grupos sem infecção. Em seguida, houve aumento dos níveis de nitrito no aborto infectado por UP. Este trabalho demonstrou que a infecção por UP pode contribuir para alterar o perfil oxidante, sugerindo, assim, que o desequilíbrio do estresse oxidativo pode contribuir com a ocorrência do aborto espontâneo associado a infecção bacteriana.Abortion is the interruption of pregnancy before the 22nd gestational week or when the fetus weighs less than 500g. It can occur naturally or be induced and has multiple causes, including genital infections. Genital tract infections can ascend to the uterine cavity and account for 15% of early abortions and 66% of late abortions. Exacerbated inflammatory responses resulting from the infectious process affect gestational homeostasis, contributing to a pro-inflammatory profile and altering the oxidative state. The main objective of this study was to evaluate markers of oxidative stress in the context of spontaneous abortion associated with Ureaplasma parvum infection. Biological samples of placental tissue were collected from women who experienced spontaneous abortion and women who had full-term deliveries. When evaluating markers of lipid peroxidation and protein carbonylation, elevated levels of TBARS and protein carbonylation were identified in abortion cases, along with increased CAT antioxidant activity and reduced GPx activity, while SOD activity remained unchanged. However, the profile of lipid peroxidation was accentuated in UP-infected abortions. GPx levels were reduced in UP- infected abortions compared to infected controls, while SOD and CAT showed no differences. The SOD/CAT ratio was reduced, and the SOD/GPx ratio was elevated in the UP groups compared to those without infection. Regarding gene expression, infected abortions showed reduced Mn SOD/GPx and decreased CuZn SOD/GPx and Mn SOD/GPx expression in both abortion and infected control groups compared to those without infection. Additionally, nitrite levels increased in UP-infected abortions. This study demonstrated that UP infection may contribute to altering the oxidant profile, suggesting that an imbalance in oxidative stress could play a role in spontaneous abortion associated with bacterial infection.FAPESB, CNPQporUniversidade Federal da BahiaPrograma Multicêntrico de Pós-Graduação em Ciências Fisiológicas (PMPGCF) UFBABrasilInstituto Multidisciplinar em Saúde (IMS)http://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessSpontaneous abortionUreaplasma parvumoxidative stressCNPQ::CIENCIAS DA SAUDEAborto espontâneoUreaplasma parvumestresse oxidativoMarcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvumMarkers of Oxidative Stress in the Context of Spontaneous Abortion Associated with Ureaplasma parvum InfectionMestrado Acadêmicoinfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/publishedVersionCampos, Guilherme BarretoOliveira, Caline TeixeiraSouza, Clarissa Leal SilvaAmaral, Liliany Souza de Brito AmaralCampos, Guilherme Barretohttps://orcid.org/0000-0003-3559-6505https://lattes.cnpq.br/9710930447454834Freire, Fernanda Karoline AlmeidaCampos, Guilherme BarretoOliveira, Caline TeixeiraAEBI, Hugo. 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dc.title.pt_BR.fl_str_mv Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
dc.title.alternative.pt_BR.fl_str_mv Markers of Oxidative Stress in the Context of Spontaneous Abortion Associated with Ureaplasma parvum Infection
title Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
spellingShingle Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
Freire, Fernanda Karoline Almeida
CNPQ::CIENCIAS DA SAUDE
Aborto espontâneo
Ureaplasma parvum
estresse oxidativo
Spontaneous abortion
Ureaplasma parvum
oxidative stress
title_short Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
title_full Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
title_fullStr Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
title_full_unstemmed Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
title_sort Marcadores de estresse oxidativo no contexto do aborto espontâneo associado a infecção por Ureaplasma parvum
author Freire, Fernanda Karoline Almeida
author_facet Freire, Fernanda Karoline Almeida
Campos, Guilherme Barreto
Oliveira, Caline Teixeira
author_role author
author2 Campos, Guilherme Barreto
Oliveira, Caline Teixeira
author2_role author
author
dc.contributor.advisor1.fl_str_mv Campos, Guilherme Barreto
dc.contributor.advisor-co1.fl_str_mv Oliveira, Caline Teixeira
dc.contributor.referee1.fl_str_mv Souza, Clarissa Leal Silva
dc.contributor.referee2.fl_str_mv Amaral, Liliany Souza de Brito Amaral
dc.contributor.referee3.fl_str_mv Campos, Guilherme Barreto
dc.contributor.authorID.fl_str_mv https://orcid.org/0000-0003-3559-6505
dc.contributor.authorLattes.fl_str_mv https://lattes.cnpq.br/9710930447454834
dc.contributor.author.fl_str_mv Freire, Fernanda Karoline Almeida
Campos, Guilherme Barreto
Oliveira, Caline Teixeira
contributor_str_mv Campos, Guilherme Barreto
Oliveira, Caline Teixeira
Souza, Clarissa Leal Silva
Amaral, Liliany Souza de Brito Amaral
Campos, Guilherme Barreto
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS DA SAUDE
topic CNPQ::CIENCIAS DA SAUDE
Aborto espontâneo
Ureaplasma parvum
estresse oxidativo
Spontaneous abortion
Ureaplasma parvum
oxidative stress
dc.subject.por.fl_str_mv Aborto espontâneo
Ureaplasma parvum
estresse oxidativo
dc.subject.other.pt_BR.fl_str_mv Spontaneous abortion
Ureaplasma parvum
oxidative stress
description Aborto é a interrupção da gestação antes da 22a semana gestacional, ou o feto pesando menos de 500g. Podendo ser de maneira habitual ou induzida, possuindo uma multicausalidade, que englobam infecções genitais. As infecções do trato genital ascendem para cavidade uterina sendo responsável por 15% dos abortos precoces e 66% nos abortos tardios. As respostas inflamatórias exacerbadas oriundas do processo infeccioso acometem a homeostase gestacional, contribuindo com o perfil pró- inflamatório e modificando o estado oxidativo. Este trabalho teve como objetivo principal avaliar os marcadores de estresse oxidativo no contexto do aborto espontâneo associadoa infecção por Ureaplasma parvum. Foram utilizadas amostras biológicas de tecido placentário de mulheres que evoluíram com aborto espontâneo e mulheres que tiveram parto a termo. Ao avaliar os marcadores de peroxidação lipídica e carbonilação proteica, foram identificados níveis elevados de (TBARS e proteína carbonilada) no aborto, bem como o aumento da atividade antioxidante pela CAT, e redução da atividade da GPx, além de uma resposta não alterada da SOD. Entretanto, o perfil da peroxidação lipídica foi acentuado no aborto infectado por UP. E os níveis da GPx foram reduzidos no aborto infectado por UP, comparado ao controle infectado, enquanto SOD e CAT não apresentaram diferenças; a razão SOD/CAT esteve reduzida e SOD/GPx elevada nos grupos de UP, comparado aos sem infecção. Na razão da expressão gênica, o aborto infectado contribuiu com a redução de Mn SOD/GPx além de reduzir a expressão de CuZn SOD/GPx e Mn SOD/GPx no grupo aborto e controle infectado, comparado aos grupos sem infecção. Em seguida, houve aumento dos níveis de nitrito no aborto infectado por UP. Este trabalho demonstrou que a infecção por UP pode contribuir para alterar o perfil oxidante, sugerindo, assim, que o desequilíbrio do estresse oxidativo pode contribuir com a ocorrência do aborto espontâneo associado a infecção bacteriana.
publishDate 2023
dc.date.issued.fl_str_mv 2023-07-27
dc.date.accessioned.fl_str_mv 2024-08-06T11:23:22Z
dc.date.available.fl_str_mv 2024-08-06T11:23:22Z
dc.type.driver.fl_str_mv Mestrado Acadêmico
info:eu-repo/semantics/masterThesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv FREIRE, Fernanda Karoline Almeida
dc.identifier.uri.fl_str_mv https://repositorio.ufba.br/handle/ri/39741
identifier_str_mv FREIRE, Fernanda Karoline Almeida
url https://repositorio.ufba.br/handle/ri/39741
dc.language.iso.fl_str_mv por
language por
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