Journal
HUMAN REPRODUCTION
Volume 15, Issue 10, Pages 2234-2240Publisher
OXFORD UNIV PRESS
DOI: 10.1093/humrep/15.10.2234
Keywords
chorioamnionitis; interleukin-6; respiratory distress syndrome; surfactant protein
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Respiratory distress syndrome (RDS) of newborns is one of the most important factors determining neonatal morbidity and mortality, The interleukin-6 (IL-6) titre in cord sera of RDS-free neonates born to mothers with histological chorioamnionitis was significantly higher than that in RDS-complicated neonates without chorioamnionitis, Maternal administration of glucocorticoid suppressed the IL-6 concentrations in the cord sera of fetuses with chorioamnionitis. The fetuses without chorioamnionitis who suffered from RDS even after maternal glucocorticoid administration showed a similar IL-6 titre to that of RDS-affected neonates without chorioamnionitis, Examination of the mechanism by which IL-6 decreased the incidence of fetal RDS revealed that H441-4, a human pulmonary adenocarcinoma cell line, stimulated with recombinant (r)-IL-6 started the synthesis of mRNA and protein of pulmonary surfactant protein (SP)-A. The present study shows that IL-6 elevation in fetuses with chorioamnionitis promotes fetal lung maturation by inducing SP-A synthesis, thereby decreasing the incidence of RDS in the preterm neonates.
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