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Related Experiment Videos

Metabolic changes during dopamine infusion in dogs.

G M Hall, C Young, A Scott

    British Journal of Anaesthesia
    |November 1, 1979
    PubMed
    Summary

    Dopamine infusion in dogs initially raised blood glucose but then caused hypoglycemia. It also stimulated lipolysis, increasing glycerol levels, with minor lactate increases but no effect on potassium.

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    Area of Science:

    • Veterinary Medicine
    • Pharmacology
    • Metabolic Research

    Background:

    • Dopamine is a catecholamine with known cardiovascular and renal effects.
    • Its metabolic effects, particularly on glucose and lipid metabolism, require further elucidation in vivo.
    • Understanding these effects is crucial for clinical applications in veterinary medicine.

    Purpose of the Study:

    • To investigate the metabolic effects of dopamine infusion in canine subjects.
    • To quantify changes in circulating glucose, glycerol, lactate, and potassium concentrations.
    • To determine dose-dependent responses to dopamine administration.

    Main Methods:

    • Twelve healthy dogs were infused with dopamine at rates of 10 or 30 µg/kg/min.
    • Blood samples were collected to measure concentrations of glucose, glycerol, lactate, and potassium.
    • Statistical analysis was performed to assess the significance of observed changes.

    Main Results:

    • Both dopamine doses initially increased blood glucose, followed by significant hypoglycemia.
    • Dopamine stimulated lipolysis, evidenced by increased plasma glycerol levels at both doses.
    • A slight, but significant, increase in blood lactate was observed with the higher dopamine dose; no significant effect on plasma potassium was noted.

    Conclusions:

    • Dopamine exerts complex, biphasic effects on glucose regulation in dogs, including initial hyperglycemia and subsequent hypoglycemia.
    • Dopamine effectively stimulates lipolysis in vivo.
    • The study highlights dopamine's significant metabolic impact beyond its well-established hemodynamic actions.

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