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Compartmentalized profiling of amniotic fluid cytokines in women with preterm labor

Author

Listed:
  • Gaurav Bhatti
  • Roberto Romero
  • Gregory Edward Rice
  • Wendy Fitzgerald
  • Percy Pacora
  • Nardhy Gomez-Lopez
  • Mahendra Kavdia
  • Adi L Tarca
  • Leonid Margolis

Abstract

Objective: Amniotic fluid cytokines have been implicated in the mechanisms of preterm labor and birth. Cytokines can be packaged within or on the surface of extracellular vesicles. The main aim of this study was to test whether the protein abundance internal to and on the surface of extracellular vesicles changes in the presence of sterile intra-amniotic inflammation and proven intra-amniotic infection in women with preterm labor as compared to the women with preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection. Study design: Women who had an episode of preterm labor and underwent an amniocentesis for the diagnosis of intra-amniotic infection or intra-amniotic inflammation were classified into three groups: 1) preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection, 2) preterm labor with sterile intra-amniotic inflammation, and 3) preterm labor with intra-amniotic infection. The concentrations of 38 proteins were determined on the extracellular vesicle surface, within the vesicles, and in the soluble fraction of amniotic fluid. Results: 1) Intra-amniotic inflammation, regardless of detected microbes, was associated with an increased abundance of amniotic fluid cytokines on the extracellular vesicle surface, within vesicles, and in the soluble fraction. These changes were most prominent in women with proven intra-amniotic infection. 2) Cytokine changes on the surface of extracellular vesicles were correlated with those determined in the soluble fraction; yet the magnitude of the increase was significantly different between these compartments. 3) The performance of prediction models of early preterm delivery based on measurements on the extracellular vesicle surface was equivalent to those based on the soluble fraction. Conclusions: Differential packaging of amniotic fluid cytokines in extracellular vesicles during preterm labor with sterile intra-amniotic inflammation or proven intra-amniotic infection is reported herein for the first time. The current study provides insights into the biology of the intra-amniotic fluid ad may aid in the development of biomarkers for obstetrical disease.

Suggested Citation

  • Gaurav Bhatti & Roberto Romero & Gregory Edward Rice & Wendy Fitzgerald & Percy Pacora & Nardhy Gomez-Lopez & Mahendra Kavdia & Adi L Tarca & Leonid Margolis, 2020. "Compartmentalized profiling of amniotic fluid cytokines in women with preterm labor," PLOS ONE, Public Library of Science, vol. 15(1), pages 1-29, January.
    • Handle: RePEc:plo:pone00:0227881
    DOI: 10.1371/journal.pone.0227881
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    References listed on IDEAS

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    1. Koenker, Roger, 2004. "Quantile regression for longitudinal data," Journal of Multivariate Analysis, Elsevier, vol. 91(1), pages 74-89, October.
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