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Delayed developmental sequences in rodent diabetic embryopathy.

G N Wilson, M Howe, J M Stover

    Pediatric Research
    |December 1, 1985
    PubMed
    Summary
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    Maternal diabetes in Wistar rats caused fetal growth delays, skeletal ossification issues, and birth defects. These effects improved by day 21 of gestation, suggesting a common teratogenic mechanism in diabetic pregnancies.

    Area of Science:

    • Reproductive Biology
    • Developmental Biology
    • Endocrinology

    Background:

    • Maternal diabetes is a known risk factor for adverse pregnancy outcomes.
    • Alloxan-induced diabetes in rodents serves as a model to study these effects.
    • Understanding the specific impacts on fetal development is crucial for human pregnancy risk assessment.

    Purpose of the Study:

    • To investigate the effects of maternal diabetes on fetal growth, skeletal development, and birth defects in Wistar rats.
    • To assess the impact of diabetic control and gestational timing on these developmental parameters.
    • To explore the role of fetal kidney beta-glucuronidase as a marker of diabetic teratogenicity.

    Main Methods:

    • Alloxan was used to induce diabetes in pregnant Wistar rats at day 6 of gestation.

    Related Experiment Videos

  • Fetal development was assessed at days 20 and 21 of gestation in offspring from control, moderately diabetic, severely diabetic, and insulin-treated dams.
  • Parameters measured included fetal weight, skeletal ossification (caudal and sternal centers), and fetal kidney beta-glucuronidase activity.

    • Main Results:

    • Severe maternal diabetes significantly decreased fetal weight, delayed skeletal ossification, and increased birth defects at day 20.
    • These developmental deficits were largely corrected by day 21, indicating a delay rather than permanent impairment.
    • Moderate diabetes and insulin treatment resulted in intermediate effects, showing a dose-dependent relationship between maternal glucose levels and fetal outcomes.

    Conclusions:

    • Maternal diabetes during gestation leads to a progression of fetal growth delay, altered developmental sequences, and increased birth defects in rats.
    • The severity of diabetic control directly correlates with the extent of these adverse effects.
    • The findings suggest a common teratogenic pathway in diabetic pregnancies with implications for human pregnancy management.