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Cyclic AMP in human preterm infant blood is associated with increased TLR-mediated production of acute-phase and anti-inflammatory cytokines in vitro.
- Source :
-
Pediatric research [Pediatr Res] 2020 Nov; Vol. 88 (5), pp. 717-725. Date of Electronic Publication: 2019 Oct 02. - Publication Year :
- 2020
-
Abstract
- Background: Preterm infants are at high risk of infection and have distinct pathogen recognition responses. Suggested mechanisms include soluble mediators that enhance cellular levels of cAMP. The aim of this study was to assess the relationship between blood cAMP concentrations and TLR-mediated cytokine production in infants during the first month of life.<br />Methods: Cord and serial peripheral blood samples (days of life 1-28) were obtained from a cohort of very preterm (<30 weeks' gestational age) and term human infants. Whole-blood concentrations of cAMP and FSL-1 and LPS in vitro stimulated cytokine concentrations were measured by ELISA and multiplex bead assay.<br />Results: cAMP concentrations were higher in cord than in peripheral blood, higher in cord blood of female preterm infants, and lower at Days 1 and 7 in infants exposed to chorioamnionitis, even after adjusting for leukocyte counts. TLR2 and TLR4-mediated TNF-α, IL-1β, IL-6, IL-12p70, and IL-10 production in vitro increased over the first month of life in preterm infants and were positively correlated with leukocyte-adjusted cAMP levels and reduced by exposure to chorioamnionitis.<br />Conclusions: The ontogeny of blood cAMP concentrations and associations with chorioamnionitis and TLR-mediated production of cytokines suggest that this secondary messenger helps shape distinct neonatal pathogen responses in early life.
- Subjects :
- Cells, Cultured
Chorioamnionitis immunology
Diglycerides pharmacology
Female
Fetal Blood immunology
Gestational Age
Humans
Infant, Newborn
Infant, Premature immunology
Leukocytes drug effects
Leukocytes immunology
Lipopolysaccharides pharmacology
Longitudinal Studies
Male
Oligopeptides pharmacology
Pregnancy
Prospective Studies
Toll-Like Receptors agonists
Chorioamnionitis blood
Cyclic AMP blood
Cytokines blood
Fetal Blood metabolism
Infant, Premature blood
Inflammation Mediators blood
Leukocytes metabolism
Toll-Like Receptors blood
Subjects
Details
- Language :
- English
- ISSN :
- 1530-0447
- Volume :
- 88
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Pediatric research
- Publication Type :
- Academic Journal
- Accession number :
- 31578034
- Full Text :
- https://doi.org/10.1038/s41390-019-0586-2