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Na+,K+-ATPase in developing rat brain during undernutrition.

O P Mishra, R Shankar

    Nutrition and Metabolism
    |January 1, 1980
    PubMed
    Summary

    Undernutrition in developing rat brains significantly lowered sodium-potassium-transporting ATPase (Na+,K+-ATPase) activity. This enzyme

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    Area of Science:

    • Neuroscience
    • Biochemistry
    • Developmental Biology

    Background:

    • Na+,K+-ATPase is crucial for maintaining cellular homeostasis in the brain.
    • Early life nutrition significantly impacts brain development and function.
    • Undernutrition during critical developmental periods can lead to long-term neurological deficits.

    Purpose of the Study:

    • To investigate the impact of undernutrition on Na+,K+-ATPase activity in the developing rat brain.
    • To explore the potential recovery of enzyme activity after nutritional rehabilitation.
    • To understand the relationship between Na+,K+-ATPase activity, brain cation content, and cholesterol levels.

    Main Methods:

    • Induction of undernutrition in rat pups from postnatal day 6 to 17.
    • Measurement of Na+,K+-ATPase activity in brain homogenates.
    • Analysis of brain cation (Na+, K+) and cholesterol content.
    • Assessment of enzyme activity recovery after a 4-week rehabilitation period.

    Main Results:

    • Significantly reduced Na+,K+-ATPase activity was observed in undernourished rats compared to controls.
    • Brain cation content remained unchanged despite undernutrition.
    • A partial recovery of Na+,K+-ATPase activity was noted after nutritional rehabilitation.
    • A potential correlation between decreased cholesterol levels and reduced enzyme activity was suggested.

    Conclusions:

    • Early life undernutrition impairs Na+,K+-ATPase activity in the developing rat brain.
    • The observed decrease in enzyme activity may be linked to reduced brain cholesterol content.
    • These changes in Na+,K+-ATPase activity could underlie functional deficits associated with developmental malnutrition.

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