Iron homeostasis in the neonate

Area of Science:

• Neonatal physiology
• Developmental biology
• Nutritional science

Background:

• Micronutrient availability is critical during fetal and neonatal development.
• Iron deficiency or excess in early life can severely impact neurodevelopment, with potentially irreversible effects.
• Newborns, especially premature infants, have unique challenges in regulating iron status.

Purpose of the Study:

• To provide an overview of current knowledge on iron status regulation in newborns.
• To examine the development of iron homeostasis factors postnatally.
• To identify factors affecting iron homeostasis in sick and premature neonates.

Main Methods:

• Review of current understanding of iron regulation in newborns.
• Examination of postnatal development of intestinal, extracellular, cellular, and systemic iron transport and storage.
• Analysis of factors influencing iron homeostasis in sick and premature neonates.

Main Results:

• Newborns, particularly premature infants, have limited ability to regulate iron status according to physiological needs.
• Factors affecting iron homeostasis in sick and premature neonates can exacerbate oxidative stress and increase infection risk.
• Impaired iron regulation in neonates can have long-term neurodevelopmental consequences.

Conclusions:

• Further research is urgently needed to understand iron homeostasis during critical neonatal development.
• Optimizing iron status in newborns is crucial for preventing adverse neurodevelopmental outcomes.
• Addressing knowledge gaps in neonatal iron metabolism is essential for improving infant health outcomes.