title: Amniotic fluid interleukin-10 (IL-10) concentrations during pregnancy and with labor.
abstract: To determine if amniotic fluid interleukin-10 (IL-10) concentrations are elevated in women with labor, either at term or preterm, and in the setting of infection-associated preterm labor, amniotic fluid samples were collected from women: (1) at term, not in labor (n = 42); at term, in labor (n = 56), preterm contractions, undelivered within 1 week (n = 22), and preterm labor, delivered within 1 week (n = 31). IL-10 concentrations were assayed in each sample via ELISA (Pharmingen, San Diego, CA). In a subsequent analysis, 8 women with preterm labor associated with chorioamnionitis were matched for gestational age with women experiencing preterm contractions (undelivered within 7 days) and preterm labor (delivered within 7 days) and amniotic fluid IL-10 concentrations compared. Approximately 40-70% of amniotic fluid samples obtained from women in each group had detectable IL-10. However, there were no significant differences in amniotic fluid IL-10 concentrations among the patients. While 1 of 8 patients with chorioamnionitis had amniotic fluid IL-10 concentrations greater than 300 pg/ml, there were no statistically significant differences among the matched samples. Amniotic fluid IL-10 concentrations were not elevated in women with term labor, preterm labor, or chorioamnionitis. This finding contrasts with the elevated concentrations of pro-inflammatory cytokines and chemokines such as interleukin-1, tumor necrosis factor-alpha, IL-6, IL-8, MIP-1 alpha, and GRO alpha reported in previous studies. Because we did not detect elevations of the key anti-inflammatory cytokine IL-10 in amniotic fluid of women with infection-associated preterm labor, we suggest that anti-inflammatory processes in this setting may be attenuated.
authors.affiliation: Department of Obstetrics and Gynecology, University of Utah School of Medicine, Salt Lake City 84132, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Dudley
authors.forename: C
authors.initials: C
authors.lastname: Hunter
authors.forename: M D
authors.initials: MD
authors.lastname: Mitchell
authors.forename: M W
authors.initials: MW
authors.lastname: Varner
mesh_terms: D000328:Adult; D000653:Amniotic Fluid / Q000276:immunology*; D002821:Chorioamnionitis / Q000150:complications / Q000276:immunology; D016207:Cytokines / Q000378:metabolism; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D018836:Inflammation Mediators / Q000378:metabolism; D016753:Interleukin-10 / Q000378:metabolism*; D007743:Labor, Obstetric / Q000276:immunology*; D007752:Obstetric Labor, Premature / Q000150:complications / Q000276:immunology; D011247:Pregnancy / Q000276:immunology*; D011251:Pregnancy Complications, Infectious / Q000276:immunology
chemical_list: D016207:Cytokines; D018836:Inflammation Mediators; D016753:Interleukin-10