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Adrenal function of low-birthweight children

Ken Ong1

  • 1Department of Paediatrics, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK.

Endocrine Development
|February 22, 2005
PubMed

Insights

Low birthweight infants may experience altered adrenal hormone secretion, potentially increasing long-term risks for hypertension, cardiovascular disease, and metabolic syndrome. This highlights critical developmental programming effects.

Area of Science:

  • Endocrinology
  • Neonatal Medicine
  • Metabolic Health

Background:

  • Low birthweight infants face increased stress, necessitating adequate adrenal cortisol secretion for survival.
  • Transient cortisol insufficiency is common in early neonatal life for low birthweight infants, followed by normalization or elevation.
  • Early life stress and low birthweight may program long-term alterations in adrenal hormone production.

Purpose of the Study:

  • To investigate the long-term consequences of altered adrenal cortisol and androgen secretion in low birthweight survivors.
  • To explore the link between early life adrenal function programming and later-life metabolic and cardiovascular health.
  • To understand the role of adrenal hyperandrogenism in conditions like precocious pubarche and polycystic ovary syndrome.

Main Methods:

  • This study is a review and synthesis of existing research on neonatal stress, low birthweight, and adrenal function.
  • Analysis of hormonal profiles (cortisol and androgens) in low birthweight infants and long-term follow-up data.
  • Correlation of early life adrenal activity with later development of hypertension, cardiovascular disease, and metabolic syndrome markers.

Main Results:

  • Low birthweight and neonatal stress can lead to programming of higher cortisol secretion, potentially increasing later cardiovascular risk.
  • Increased adrenal androgen secretion in low birthweight infants is linked to hyperandrogenism and hyperinsulinemia.
  • Precocious pubarche in girls, a sign of adrenal hyperandrogenism, predicts polycystic ovary syndrome and metabolic disturbances.

Conclusions:

  • Long-term effects of low birthweight impact both adrenal cortisol and androgen secretion.
  • These hormonal changes contribute to an increased risk of developing metabolic syndrome later in life.
  • Early life programming of adrenal function in low birthweight infants has significant implications for adult health.

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