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Glucose utilization in the horse

E J Ford, J Evans

    The British Journal of Nutrition
    |July 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Fasting significantly reduces glucose entry and irreversible loss rates in Shetland ponies, indicating altered glucose metabolism. Glucose recycling rates remained stable, suggesting efficient glucose utilization even after a 24-hour fast.

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    Area of Science:

    • Equine physiology
    • Metabolic studies
    • Glucose kinetics

    Background:

    • Understanding glucose metabolism is crucial for equine health and nutrition.
    • Fasting impacts metabolic pathways, but specific effects on glucose kinetics in ponies require detailed investigation.

    Purpose of the Study:

    • To quantify total entry, irreversible loss, and recycling rates of glucose in Shetland ponies.
    • To assess the impact of a 24-hour fast on these glucose kinetic parameters.
    • To evaluate the response of endogenous glucose production to exogenous glucose infusion.

    Main Methods:

    • Continuous intravenous infusion of a mixture of [U-14C]glucose and [2-3H]glucose in four non-pregnant female Shetland ponies.
    • Measurements were taken before and after a 24-hour fasting period.

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  • Exogenous glucose infusion was administered to assess endogenous glucose production.

    • Main Results:

    • A 24-hour fast significantly decreased total glucose entry rate (P < 0.01) and irreversible glucose loss (P < 0.02).
    • Plasma glucose and ketone concentrations showed no significant changes post-fasting.
    • Individual responses to glucose infusion varied, with one pony showing depressed endogenous glucose production.

    Conclusions:

    • Fasting alters glucose metabolism in ponies, primarily by reducing glucose turnover.
    • The irreversible loss rate of glucose in horses appears comparable to that in other species.
    • Further research is needed to understand individual variability in glucose regulation.