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Undernutrition in the developing rat: effect upon myelination.

M R Krigman, E L Hogan

    Brain Research
    |May 7, 1976
    PubMed
    Summary
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    Undernutrition in young rats significantly inhibits brain development and myelination. This study reveals reduced brain weight, thinner myelin sheaths, and delayed myelin formation in undernourished animals.

    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Nutritional Science

    Background:

    • Early-life nutrition is critical for brain development.
    • Undernutrition can profoundly impact neurological maturation.
    • Myelination is a key process in the central nervous system.

    Purpose of the Study:

    • To investigate the effects of early-life undernutrition on brain development and myelination in rats.
    • To quantify the impact of restricted food intake on brain growth and myelin formation.

    Main Methods:

    • Long-Evans rats were subjected to undernutrition from birth through 60 days of age.
    • Histologic, biochemical, and ultrastructural morphometric analyses were performed.
    • Brain and body weights were measured, and myelin composition was analyzed.

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    Main Results:

    • Undernutrition significantly reduced body and brain weights (up to 70% and 30%, respectively).
    • Morphometric analysis showed reduced proportion of myelinated axons and thinner myelin sheaths.
    • Biochemical analysis revealed deficits in myelin-specific lipids and delayed myelinogenesis.

    Conclusions:

    • Early-life undernutrition severely inhibits and retards brain myelination in rats.
    • Reduced glial cell formation and myelin lamellae production contribute to these effects.
    • These findings highlight the critical role of nutrition in normal brain development.