Fetal membrane biomarker network diversity and disease functions induced by intra-amniotic pathogens.

PROBLEM: Intra-amniotic pathogens and by-products activate innate immune responses encompassing multitudes of signaling molecules and pathways that can result in spontaneous preterm birth (PTB). This study investigates fetal membrane response to bacterial stimulation using a bioinformatics approach.

METHOD OF STUDY: Dysregulated biomarker (IL1-β, IL-2, IL-8, IL-10, and TNF-α) data from fetal membranes at term stimulated with Ureaplasma urealyticum, Ureaplasma parvum, Mycoplasma hominis, E. coli, Group B Streptococci, Polyporhans gingivalis, or Gardnerella vaginalis with 50% (v/v) amniotic fluid (AF) were analyzed by Ingenuity Pathway Analysis.

RESULTS

In racially stratified analysis, networks representing late-stage immune inflammation were seen in African-Americans in AF absence. Inflammation was dominant in AF presence as well. In Caucasians, late-stage immune response was dominant with AF, but not in its absence.

CONCLUSIONS

Fetal membrane biofunctions in response to bacteria reflect early- and late-stage innate immune defenses that vary based on the presence of AF and subject race.