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Related Experiment Videos

Diabetes mellitus and thermoregulation.

A R Scott, T Bennett, I A Macdonald

    Canadian Journal of Physiology and Pharmacology
    |June 1, 1987
    PubMed
    Summary

    Diabetes impairs the body's ability to regulate temperature, especially in individuals with diabetic neuropathy. This can lead to shivering and a drop in core body temperature during cold exposure.

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    Area of Science:

    • Endocrinology
    • Neuroscience
    • Cardiovascular Medicine

    Background:

    • Diabetes mellitus presents with metabolic, cardiovascular, and neuronal dysfunctions.
    • These alterations can significantly impact the body's thermoregulatory capacity.
    • Diabetic complications like neuropathy and vasculopathy are key factors in impaired temperature control.

    Purpose of the Study:

    • To comprehensively review how diabetes pathophysiology affects thermoregulation.
    • To investigate the specific roles of diabetic neuropathy, vasculopathy, and metabolic factors (glucose, insulin) in thermoregulation.
    • To present original research on thermoregulatory responses in diabetic individuals under cold stress.

    Main Methods:

    • Literature review of diabetes-related thermoregulatory impairments.
    • Analysis of how diabetic neuropathy and vasculopathy affect peripheral blood flow and heat conservation.
    • Experimental study involving intravenous insulin infusion to maintain metabolic stability during cold stress testing.
    • Assessment of thermoregulatory responses, including reflex vasoconstriction and shivering, in diabetics with and without neuropathy compared to non-diabetics.

    Main Results:

    • Hypoglycemia and diabetic ketoacidosis are linked to hypothermia, though mechanisms in ketoacidosis remain unclear.
    • Autonomic neuropathy can impair heat conservation, contributing to or resulting from impaired thermoregulation.
    • In a controlled cold stress study, diabetics with neuropathy showed impaired reflex vasoconstriction in limbs.
    • This impairment led to increased shivering and, in some cases, a drop in core temperature in response to moderate cold, unlike non-diabetics or diabetics without neuropathy.

    Conclusions:

    • Diabetic neuropathy significantly impairs the ability to conserve heat during cold exposure.
    • Failure of reflex vasoconstriction in the limbs of diabetics with neuropathy contributes to hypothermia risk.
    • Thermoregulatory dysfunction in diabetes, particularly with neuropathy, requires further clinical attention.

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