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Hyaluronidase activity in split human semen.

M Savion, R Singer, M Sagiv

    International Journal of Fertility
    |July 1, 1986
    PubMed
    Summary
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    Hyaluronidase enzyme activity, crucial for fertilization, was higher in the initial sperm-rich semen fractions. This finding relates enzyme levels to sperm quality in human semen samples.

    Area of Science:

    • Reproductive biology
    • Enzymology
    • Human fertility studies

    Background:

    • Hyaluronidase is an essential acrosomal enzyme facilitating fertilization by breaking down the hyaluronic acid matrix of the cumulus oophorus.
    • Understanding hyaluronidase activity in human semen is vital for assessing male fertility potential.

    Purpose of the Study:

    • To quantify and compare hyaluronidase activity in different fractions of human semen from normozoospermic and oligozoospermic individuals.
    • To investigate the correlation between sperm parameters and hyaluronidase enzyme activity.

    Main Methods:

    • Semen samples were fractionated, and hyaluronidase activity was measured using hyaluronic acid digestion in agar plates.
    • Enzyme activity was quantified by comparing digestion areas to those produced by a commercial testicular hyaluronidase standard.

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  • Activity was expressed in micrograms per milliliter (µg/mL).

    • Main Results:

    • Significantly higher hyaluronidase activity was observed in the first semen fractions (136.0–207.0 µg/mL) compared to the second fractions (117.8–134.0 µg/mL).
    • The first semen fractions typically exhibit higher sperm density and better sperm quality, correlating with increased enzyme activity.
    • Oligozoospermic and normozoospermic samples showed variations in enzyme activity levels across fractions.

    Conclusions:

    • Sperm-rich fractions of human semen possess higher hyaluronidase activity, suggesting a link between enzyme levels and sperm quality.
    • This finding may have implications for understanding fertilization mechanisms and diagnosing male infertility.
    • Further research could explore the clinical utility of measuring hyaluronidase activity in specific semen fractions.