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Estrogenic absorption through the skin: an experimental study

C Goisis, F Goisis, R Tammiso

    Acta Europaea Fertilitatis
    |March 1, 1980
    PubMed
    Summary
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    Both ethinylestradiol and Ralone, studied estrogens, were absorbed through rat skin. Their effects on target organs were similar and dose-dependent, with a 1:1,000 activity ratio.

    Area of Science:

    • Pharmacology and Toxicology
    • Endocrinology

    Background:

    • Estrogens, including steroid (ethinylestradiol) and non-steroid (Ralone) types, are widely used.
    • Understanding their percutaneous absorption and systemic effects is crucial for therapeutic applications.

    Purpose of the Study:

    • To investigate the percutaneous absorption of ethinylestradiol and Ralone in rats.
    • To compare the systemic effects of these two estrogens on target organs.
    • To establish the relationship between their potencies and effects.

    Main Methods:

    • Percutaneous administration of ethinylestradiol and Ralone to rats.
    • Observation and measurement of effects on target organs.
    • Comparative analysis of estrogenic activity based on a 1:1,000 ratio.

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    Main Results:

    • Both ethinylestradiol and Ralone demonstrated significant percutaneous absorption in rats.
    • The two estrogens exhibited similar effects on target organs.
    • The observed effects were proportionally dependent on their established 1:1,000 activity ratio.

    Conclusions:

    • Percutaneous absorption is a viable route for both steroid and non-steroid estrogens in rats.
    • Ethinylestradiol and Ralone possess comparable systemic effects, modulated by their dose and inherent potency.
    • These findings have implications for the therapeutic use and risk assessment of estrogens.