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Related Experiment Videos

Placental sulfatase deficiency: a case study.

R Osathanondh, J Canick, K J Ryan

    The Journal of Clinical Endocrinology and Metabolism
    |July 1, 1976
    PubMed
    Summary
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    Placental sulfatase deficiency was diagnosed in a pregnancy with low estriol levels. This rare condition affects steroid metabolism, confirmed by in vitro placental studies and infant follow-up.

    Area of Science:

    • Reproductive Endocrinology
    • Maternal-Fetal Medicine
    • Steroid Metabolism

    Background:

    • Placental sulfatase deficiency (PSD) is a rare genetic disorder.
    • It impairs the conversion of dehydroepiandrosterone sulfate (DS) to estrogens, crucial for pregnancy.
    • Diagnosis is often suspected due to abnormal maternal urinary estriol levels.

    Purpose of the Study:

    • To investigate a suspected case of placental sulfatase deficiency.
    • To characterize the hormonal profile in maternal plasma, amniotic fluid, and umbilical cord blood.
    • To confirm the diagnosis through in vitro placental studies.

    Main Methods:

    • Maternal urinary estriol, plasma estriol, estradiol 17-beta (E2), and estetrol (E4) levels were measured.
    • Amniotic fluid and umbilical cord blood dehydroepiandrosterone sulfate (DS) concentrations were analyzed.

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  • In vitro placental microsome studies were performed to assess sulfatase activity.

    • Main Results:

    • Extremely low maternal urinary estriol, plasma E2, and undetectable E4 levels were observed.
    • Significantly elevated amniotic fluid and umbilical cord blood DS levels were found.
    • In vitro studies confirmed placental sulfatase deficiency, with normal infant growth and development at 6 months.

    Conclusions:

    • The case highlights the diagnostic utility of specific steroid hormone measurements in pregnancy.
    • Placental sulfatase deficiency can be confirmed through biochemical and in vitro analyses.
    • Infants with PSD may exhibit normal postnatal development despite prenatal hormonal abnormalities.