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Related Experiment Videos

Origin of lysozyme in amniotic fluid.

T Umezu, S Hisanaga, H Shimokawa

    Nihon Sanka Fujinka Gakkai Zasshi
    |February 1, 1985
    PubMed
    Summary

    Amniotic fluid lysozyme levels may indicate fetal maturity. This study found that lysozyme in amniotic fluid originates from multiple sources, including saliva, urine, cord serum, and amnion tissue.

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    Area of Science:

    • Biochemistry
    • Obstetrics
    • Fetal Development

    Background:

    • Previous research indicated amniotic fluid lysozyme patterns correlate with fetal maturity indicators like L/S ratio and creatinine.
    • The precise origin of amniotic fluid lysozyme and its relation to specific fetal organ maturity remained unclear.

    Purpose of the Study:

    • To investigate the sources of amniotic fluid lysozyme.
    • To determine if amniotic fluid lysozyme concentration reflects the maturity of specific fetal organs.

    Main Methods:

    • Lysozyme content was measured in amniotic fluid, amnion tissue, saliva, urine, and cord serum collected after birth.
    • Quantitative analysis of lysozyme concentrations in various biological samples.

    Main Results:

    • Lysozyme concentrations varied significantly across sources: saliva (36.5 ± 6.7 µg/ml), cord serum (17.4 ± 4.4 µg/ml), and urine (5.3 ± 0.9 µg/ml).
    • Amnion tissue samples showed low but detectable lysozyme levels, suggesting in vivo production by amnion.
    • The study could not definitively identify a single primary source of amniotic fluid lysozyme.

    Conclusions:

    • Amniotic fluid lysozyme is derived from multiple sources, including maternal and fetal contributions.
    • The findings support the hypothesis that amniotic fluid lysozyme is a complex marker with contributions from various tissues and fluids.

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