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Related Experiment Videos

Physiological dosing of exogenous ACTH.

M L Graybeal, V S Fang

    Acta Endocrinologica
    |March 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    A low dose of cosyntropin (0.2 micrograms/kg) mimics natural ACTH and cortisol stress responses. This finding suggests caution when interpreting standard high-dose adrenal function tests.

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    Area of Science:

    • Endocrinology
    • Adrenal Function Testing

    Background:

    • Adrenal function tests typically use high doses of exogenous ACTH (cosyntropin).
    • The physiological stress response involves endogenous ACTH and cortisol release.

    Purpose of the Study:

    • To compare the hormonal responses to low-dose cosyntropin with physiological stress-induced responses.
    • To evaluate the adequacy of a reduced cosyntropin dose in stimulating adrenal function.

    Main Methods:

    • Administered various doses of exogenous ACTH (cosyntropin) to subjects.
    • Measured ACTH and cortisol levels post-administration.
    • Compared these levels to those obtained during insulin-induced hypoglycemia (a physiological stressor).

    Main Results:

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  • A cosyntropin dose of 0.2 micrograms/kg body weight elicited ACTH and cortisol levels comparable to physiological stress.
  • This effective dose is only about 4% of the standard 250 micrograms dose used in adrenal function tests.

    • Conclusions:

    • The standard high-dose ACTH stimulation test may not be necessary for assessing adrenal reserve.
    • A lower, more physiological dose of cosyntropin can effectively evaluate adrenal function.
    • Caution is advised in interpreting results from standard high-dose adrenal function tests.