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Related Experiment Videos

TSH responses to temperature in primary hypothyroidism

B P O'Malley, T J Davies, F D Rosenthal

    Clinical Endocrinology
    |July 1, 1980
    PubMed
    Summary

    Body temperature significantly impacts thyroid-stimulating hormone (TSH) levels in patients with primary hypothyroidism. Increased body temperature, achieved through warming, led to a notable decrease in serum TSH concentrations.

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    Area of Science:

    • Endocrinology
    • Thermoregulation
    • Thyroid Disorders

    Background:

    • Thyroid-stimulating hormone (TSH) is a key regulator of thyroid function.
    • Primary hypothyroidism involves insufficient thyroid hormone production.
    • The influence of body temperature on TSH levels in hypothyroidism requires further elucidation.

    Purpose of the Study:

    • To investigate the relationship between body temperature alterations and serum TSH levels in patients with primary hypothyroidism.
    • To determine if controlled heating affects TSH concentrations in this patient group.

    Main Methods:

    • Serum TSH levels were measured in twelve patients with primary hypothyroidism before and after 48 hours of controlled warming.
    • TSH responses to rest and exercise were assessed in four control subjects.
    • In three patients, TSH levels were monitored frequently during rest and warming over 48 hours.

    Main Results:

    • A significant decrease in serum TSH was observed in twelve hypothyroid patients after warming.
    • In a subgroup of three patients, TSH levels showed an inverse correlation with both cutaneous and core body temperatures.
    • Control subjects exhibited TSH responses to rest and exercise, distinct from the warming effect.

    Conclusions:

    • Alterations in body temperature demonstrably influence circulating TSH levels in primary hypothyroidism.
    • Warming can lead to a reduction in TSH in hypothyroid patients.
    • Body temperature is a relevant factor affecting TSH regulation in primary hypothyroidism.

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