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Interleucina 1β e interleucina 6 no líquido amniótico: relação com invasão microbiana da cavidade ammniótica em gestantes em trabalho de parto prematuro

Authors: Marconi, Camila;

Interleucina 1β e interleucina 6 no líquido amniótico: relação com invasão microbiana da cavidade ammniótica em gestantes em trabalho de parto prematuro

Abstract

O Trabalho de Parto Prematuro (TPP) é uma grave intercorrência obstétrica que acomete de 5-10% das gestações. Embora sua etiologia seja multifatorial, a infecção da cavidade amniótica (CA) é um importante fator associado ao seu desencadeamento. Objetivo: Comparar a freqüência de infecção na cavidade amniótica de gestantes em TPP em relação a gestantes fora de trabalho de parto e correlacionar com os níveis de citocinas pró-inflamatórias no líquido amniótico (LA). Material e Métodos: Foram incluídas neste estudo 20 gestantes em TPP e 20 gestantes fora de trabalho de parto, com idades gestacionais pareadas. No grupo TPP, amostras de LA foram obtidas no momento da resolução da gestação ou durante amniocentese transabdominal. O grupo de gestantes fora de trabalho de parto foi constituído de pacientes com indicação de amniocentese transabdominal. Para avaliação da infecção na CA foram realizadas reações em cadeia da polimerase (PCR) para a detecção de Mycoplasma hominis, Ureaplasma urealyticum e do gene bacteriano RNAr 16S. Os produtos de RNAr 16S foram seqüenciados para a identificação da espécie bacteriana. Os níveis das citocinas inflamatórias, interleucina (IL)-1β, IL-6, IL-8 e fator de necrose tumoral (TNF-α) no LA foram quantificados por ensaio imunoenzimático (ELISA). Resultados: A incidência de TPP no período do estudo foi de 5,8%. No grupo TPP, a pesquisa de invasão microbiana da CA foi positiva para M. hominis (35,0%), U. urealyticym (10,0%) e gene RNAr 16S (30,0%), sendo todas as freqüências superiores às encontradas no grupo fora de trabalho de parto (p<0,05). Quanto às citocinas, níveis aumentados de IL-1β (p=0,03), IL-6 (p<0,001) e IL-8 (p<0,001) foram detectados no LA das pacientes em TPP em relação às gestantes fora de trabalho de parto. Além disso, amostras de LA, com presença de infecção, apresentaram níveis...

Preterm labor (PL) represents a serious obstetric complication whose rate is 5-10%. Although the PL etiology is multifactorial, intraamniotic infection is strongly associated to its occurrence. Objective: To compare the frequency of intraamniotic infection in women presenting PL with women not in labor and to correlate with inflammatory cytokines levels in amniotic fluid (AF). Material and Methods: Twenty women with PL and 20 women with same gestational age, but not in labor, were included in this study. AF samples of women in PL were collected at delivery or by amniocentesis. The control group was composed by women with indication for amniocentesis. The evaluation of intraamniotic infection was performed detecting Mycoplasma hominis, Ureaplasma urealyticum and the bacterial rRNA 16S gene using polymerase chain reaction (PCR). The PCR rRNA 16S products were sequenced for bacterial species identification. The IL-1β, IL-6, IL-8 and TNF-α levels in AF were measured by enzyme-linked immunoabsorbent assay (ELISA). Results: During the study period, PL rate was 5,8%. Intraamniotic infection in women with PL was positive for M. hominis (35,0%), U. urealyticum (10,0%) and bacterial rRNA 16S (30,0%). AF infection rates for all tested microorganism were superior in PL when compared to women not in labor (p<0,05). Regarding to the cytokine measurement, AF of PL women showed increased IL-1β (p=0,03), IL-6 (p<0,001) and IL-8 (p<0,001) levels in comparison to AF samples from women not in labor. Additionally, AF with infection presented increased levels of IL-1β e IL-6 (p=0,03). Conclusion: Women with PL present high frequency of intraamniotic infection when compared with women not in labor and such infection correlates with increased IL-1β e IL-6 AF levels.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Fundação para o Desenvolvimento da UNESP (FUNDUNESP)

Pós-graduação em Patologia - FMB

Country
Brazil
Keywords

Gravidez, Parto prematuro, Premature birth

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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