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Chronic hypoxaemia as a molecular regulator of fetal lung development: implications for risk of respiratory

Erin V McGillick1, Sandra Orgeig2, Dino A Giussani3

  • 1Early Origins of Adult Health Research Group; Molecular and Evolutionary Physiology of the Lung Laboratory, School of Pharmacy and Medical Sciences, Sansom Institute for Health Research, University of South Australia, Adelaide, Australia.

Paediatric Respiratory Reviews
|October 4, 2016
PubMed

Insights

Chronic fetal hypoxemia, linked to intrauterine growth restriction (IUGR), impacts fetal lung development through various molecular pathways. The timing and severity of hypoxemia influence respiratory outcomes in newborns.

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Neonatology

Background:

  • Altered intrauterine conditions affect fetal growth and organ development.
  • Chronic fetal hypoxemia is a common complication associated with intrauterine growth restriction (IUGR).
  • IUGR and hypoxemia can increase the risk of respiratory complications in newborns.

Purpose of the Study:

  • To review molecular pathways involved in altered fetal lung maturation due to chronic hypoxemia.
  • To understand how IUGR-associated hypoxemia affects fetal lung development.
  • To explore the heterogeneity in respiratory outcomes at birth.

Main Methods:

  • Literature review of molecular signaling pathways in fetal lung development.
  • Analysis of factors influencing fetal lung maturation under hypoxemic conditions.
  • Examination of the relationship between hypoxemia etiology and molecular effects.

Main Results:

  • Chronic hypoxemia influences fetal lung development via multiple molecular pathways.
  • The specific etiological factors (maternal, placental, fetal) of IUGR-associated hypoxemia can alter molecular signaling.
  • Hormone concentrations, oxygen, and nutrient transport are affected by hypoxemia.

Conclusions:

  • The timing, severity, and duration of fetal hypoxemia are critical determinants of lung development.
  • Heterogeneity in respiratory outcomes at birth is linked to the specific characteristics of fetal hypoxemia exposure.
  • Understanding these molecular pathways is crucial for managing respiratory risks in infants affected by IUGR.

Keywords:
Fetal lungchronic hypoxaemiaintrauterine growth restrictionoxidative stresspulmonary surfactantrespiratory distress syndrome

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