Análise quantitativa da expressão de citocinas inflamatórias em membranas corioamnióticas de gestantes com rotura prematura de membranas pré-termo
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Data
2007-02-16
Autores
Polettini, Jossimara [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A Rotura Prematura de Membranas Pré-Termo (RPM-PT) é um dos principais problemas da Clínica Obstétrica, com etiologia relacionada à ascensão bacteriana do trato genital inferior para a decídua e membranas corioamnióticas. Objetivo: quantificar a expressão das citocinas inflamatórias interleucina (IL) -1b, IL-6, IL-8 e fator de necrose tumoral (TNF-a) pelas membranas corioamnióticas de gestantes com RPM-PT, e avaliar a correlação dessa expressão com a presença e intensidade do infiltrado inflamatório nas membranas e decídua. Material e Métodos: Foram incluídas no estudo, 25 gestantes com RPM-PT em trabalho de parto e 15 gestantes com RPM-PT fora do trabalho de parto. Como grupo controle foram avaliadas 25 gestantes em trabalho de parto prematuro (TPP) e bolsa íntegra. No momento da resolução da gestação, após a dequitação, foram retirados fragmentos das membranas corioamnióticas e acondicionados em RNA later para posterior quantificação do RNA mensageiro (RNAm) das citocinas inflamatórias pela técnica de PCR em tempo real. Outros fragmentos das membranas foram submetidos à análise histopatológica para avaliação da presença e semi-quantificação do infiltrado inflamatório. Resultados: No período do estudo, a incidência de RPM-PT foi de 4,6%. A presença de infiltrado inflamatório nas membranas corioamnióticas e/ou decídua foi de 75% no grupo RPM-PT. A concentração relativa de RNAm de IL-1b, IL-6 e IL-8 não foi estatisticamente diferente nos grupos estudados. Para TNF-a, a concentração relativa de RNA foi estatisticamente superior nas membranas de gestantes com TPP em relação aos grupos com RPM-PT. Na presença de infiltrado inflamatório nas membranas corioamnióticas, a concentração de RNAm de IL-1b foi estatisticamente maior no grupo RPM-PT fora de trabalho de parto...
The preterm premature rupture of membranes (PPROM) is one of the major problems of Clinical Obstetrics. Its etiology is related to the ascending pathway of bacteria from the lower genital tract to the decidua and chorioamniotic membranes. Objective: To quantify the expression of the inflammatory cytokines interleukin-1 (IL) -1b, IL-6, IL-8 and tumor necrosis factor alpha (TNF-a) in the chorioamniotic membranes of pregnant women with PPROM and evaluate the correlation of this expression with the presence and intensity of the inflammatory infiltrates present in the membranes and decidua. Material and Methods: Twenty-five PPROM women in labor and 15 PPROM without labor women were studied. As a control group of 25 pregnant women in premature labor (PTL) were studied. After delivery, samples of the chorioamniotic membranes were collected for histopathological analyses and others fragments were conditioned in RNA later for posterior quantification of cytokine mRNA expression by real time PCR. Results: In the study period, the incidence of PPROM was 4.6% and in 75% of these samples the presence of inflammatory infiltrates in the chorioamniotic membranes and/or decidua was observed. mRNA expression of IL-1b, IL-6 and IL-8 was not statistically different in the groups studied. For TNF-a, the expression of mRNA was statistically higher in the PTL group in relation to the groups with PPROM. In the presence of inflammatory infiltrates in the membranes, the concentration of mRNA of IL- 1b it was statistically greater in the PPROM without labor group. No difference occurred in the intensity of cytokine mRNA in relation to the intensity of the infiltrated inflammatory in the groups studied. In 87.2% of the chorioamniotic membranes included in the study, mRNA was expressed for all the cytokines studied... (Complete abstract, click electronic access below)
The preterm premature rupture of membranes (PPROM) is one of the major problems of Clinical Obstetrics. Its etiology is related to the ascending pathway of bacteria from the lower genital tract to the decidua and chorioamniotic membranes. Objective: To quantify the expression of the inflammatory cytokines interleukin-1 (IL) -1b, IL-6, IL-8 and tumor necrosis factor alpha (TNF-a) in the chorioamniotic membranes of pregnant women with PPROM and evaluate the correlation of this expression with the presence and intensity of the inflammatory infiltrates present in the membranes and decidua. Material and Methods: Twenty-five PPROM women in labor and 15 PPROM without labor women were studied. As a control group of 25 pregnant women in premature labor (PTL) were studied. After delivery, samples of the chorioamniotic membranes were collected for histopathological analyses and others fragments were conditioned in RNA later for posterior quantification of cytokine mRNA expression by real time PCR. Results: In the study period, the incidence of PPROM was 4.6% and in 75% of these samples the presence of inflammatory infiltrates in the chorioamniotic membranes and/or decidua was observed. mRNA expression of IL-1b, IL-6 and IL-8 was not statistically different in the groups studied. For TNF-a, the expression of mRNA was statistically higher in the PTL group in relation to the groups with PPROM. In the presence of inflammatory infiltrates in the membranes, the concentration of mRNA of IL- 1b it was statistically greater in the PPROM without labor group. No difference occurred in the intensity of cytokine mRNA in relation to the intensity of the infiltrated inflammatory in the groups studied. In 87.2% of the chorioamniotic membranes included in the study, mRNA was expressed for all the cytokines studied... (Complete abstract, click electronic access below)
Descrição
Palavras-chave
Gravidez - Patologia, Gravidez - Doenças - Aspectos imunológicos, Citocinas inflamatórias, Pregnancy - Pathology, Gestation - Disease - Immunological aspects
Como citar
POLETTINI, Jossimara. Análise quantitativa da expressão de citocinas inflamatórias em membranas corioamnióticas de gestantes com rotura prematura de membranas pré-termo. 2007. 63 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Medicina de Botucatu, 2007.