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Neonatal macrosomia in maternal diabetes

Y S Kim, I Jatoi, Y Kim

    Diabetologia
    |May 1, 1980
    PubMed
    Summary

    Maternal diabetes impacts fetal growth. Increased DNA polymerase activity in neonates from diabetic mothers suggests its role in manifesting macrosomia, which paradoxically decreases with diabetes severity.

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    Area of Science:

    • Reproductive biology
    • Developmental biology
    • Endocrinology

    Background:

    • Maternal diabetes is a significant risk factor for adverse pregnancy outcomes.
    • Fetal growth abnormalities, including macrosomia, are common in diabetic pregnancies.
    • Understanding the biochemical mechanisms controlling fetal growth is crucial.

    Purpose of the Study:

    • To investigate the effect of maternal diabetes on rat fetal somatic growth.
    • To explore the biochemical mechanisms, specifically DNA polymerase activity, underlying fetal growth control in diabetic pregnancies.

    Main Methods:

    • Rat neonates were classified based on maternal urinary glucose excretion levels (normal, mild, severe diabetes).
    • Concentrations of DNA and proteins were measured in neonates.
    • DNA polymerase-alpha activities were assessed in neonates from mothers with varying diabetes severity.

    Main Results:

    • Neonatal macrosomia was observed to decrease as maternal diabetes severity increased.
    • DNA polymerase activity was significantly elevated in neonates from mildly diabetic mothers compared to controls.
    • DNA polymerase activity was also elevated in neonates from severely diabetic mothers, but less so than in mild cases.

    Conclusions:

    • Neonatal macrosomia does not linearly correlate with maternal diabetes severity.
    • DNA polymerase-alpha activity is implicated as a potential biochemical mediator in the manifestation of macrosomia in pregnancies complicated by diabetes.

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