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Placental proteins with predicted roles in fetal development decrease in premature infants.

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The preterm placenta secretes vital proteins for fetal organ development. These placental proteins decrease after birth, potentially impacting preterm infant outcomes and requiring further research.

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Area of Science:

  • Perinatal Medicine
  • Proteomics
  • Fetal Development

Background:

  • Placental factors are crucial for fetal organ development, as suggested by animal studies.
  • Preterm birth is a significant cause of infant morbidity and mortality.
  • Novel therapeutic targets are needed for preterm infants.

Purpose of the Study:

  • To characterize the proteome of the umbilical vein and artery in preterm infants.
  • To identify proteins that decrease in neonatal circulation post-delivery.
  • To explore the role of placental-secreted proteins in fetal development.

Main Methods:

  • Collected cord blood at delivery and neonatal blood at 48-72 hours from 25 preterm infants.
  • Utilized the SomaLogic platform to quantify plasma protein abundance.
  • Compared protein levels between umbilical vessels and neonatal circulation.

Main Results:

  • Identified 434 proteins significantly higher in umbilical vein compared to artery, indicating placental secretion.
  • Found 142 proteins significantly lower in neonatal blood versus umbilical vein.
  • Highlighted proteins like FGF2 and FGF1, involved in brain and lung development, respectively.

Conclusions:

  • The human placenta secretes proteins important for fetal organ development, particularly in the second trimester.
  • These proteins decrease in circulation after birth.
  • Further investigation is needed to link these placental proteins to specific organ development and adverse outcomes in preterm infants.