Maternal and fetal adrenocortical function in the diabetic rabbit

Area of Science:

• Endocrinology
• Reproductive Biology
• Perinatal Medicine

Background:

• Pregnancy complications like diabetes mellitus can impact maternal and fetal endocrine function.
• Glucocorticoids play crucial roles in fetal maturation and stress adaptation.

Purpose of the Study:

• To determine if maternal or fetal glucocorticoid secretion is altered in pregnancies complicated by alloxan-induced diabetes mellitus.
• To investigate the in vitro adrenal production of corticosterone and cortisol in diabetic pregnancies.

Main Methods:

• Alloxan-induced diabetes in pregnant rabbits prior to conception.
• Measurement of plasma corticosterone (B) and cortisol (F) throughout gestation.
• In vitro assessment of adrenal gland glucocorticoid production on day 28 of gestation.

Main Results:

• Diabetic fetuses exhibited hyperglycemia, hyperinsulinemia, and significantly higher mortality.
• Maternal plasma B and F levels showed no significant difference, but fetal F levels were lower.
• In vitro production of B and F by both maternal and fetal adrenals was reduced in diabetic animals.

Conclusions:

• Alloxan-induced diabetes mellitus in pregnant rabbits impairs maternal and fetal adrenal glucocorticoid secretion.
• Reduced glucocorticoid production may affect fetal maturational processes and stress response.
• This impairment could have significant implications for fetal well-being during diabetic pregnancies.