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Progestogens with antimineralocorticoid activity.

W Losert, J Casals-Stenzel, M Buse

    Arzneimittel-Forschung
    |January 1, 1985
    PubMed
    Summary

    This study evaluated 11 steroids for their ability to block aldosterone's effects on the kidneys in rats. Gestodene and other compounds showed significant antimineralocorticoid activity, with gestodene exhibiting a progesterone-like profile.

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    Area of Science:

    • Endocrinology
    • Pharmacology
    • Nephrology

    Background:

    • Aldosterone plays a key role in regulating renal sodium and potassium excretion.
    • Antimineralocorticoid drugs are crucial for managing conditions like hypertension and heart failure.
    • Understanding the comparative efficacy of different progestogens is vital for drug development.

    Purpose of the Study:

    • To assess the antimineralocorticoid activity of 11 steroids in a rat model.
    • To compare the potency of these steroids against aldosterone's renal effects.
    • To identify progestogens with a progesterone-like activity profile.

    Main Methods:

    • Adrenalectomized rats treated with glucocorticoids received continuous aldosterone infusion.
    • Test steroids were administered subcutaneously or orally.
    • Urinary sodium and potassium excretion were measured to determine the Na/K ratio as an indicator of antimineralocorticoid activity.

    Main Results:

    • Gestodene, spironolactone, spirorenone, 1,2-dihydro-spirorenone, and 1,2 alpha-methylene-spirorenone demonstrated significant antimineralocorticoid effects.
    • D-Norgestrel, norethisterone acetate, and cyproterone acetate showed no significant antimineralocorticoid or mineralocorticoid activity.
    • Gestodene exhibited a relative potency of approximately 0.2 compared to spironolactone (1.0) and was devoid of mineralocorticoid activity.

    Conclusions:

    • Gestodene is the first nortestosterone-derived progestogen identified with a natural, progesterone-like activity profile.
    • Several spirorenone derivatives showed potent antimineralocorticoid activity.
    • The study provides valuable comparative data on the antimineralocorticoid potential of various steroids.

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