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Related Experiment Videos

Proteolytic enzymes in human eccrine sweat: a screening study.

N Horie, H Yokozeki, K Sato

    The American Journal of Physiology
    |April 1, 1986
    PubMed
    Summary
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    Human eccrine sweat contains proteases, with higher levels in scraped samples due to skin contamination. Clean sweat reveals distinct proteinases originating from sweat ducts and secretory coils.

    Area of Science:

    • Biochemistry
    • Dermatology
    • Human Physiology

    Background:

    • Human eccrine sweat contains various enzymes, including proteases.
    • Contamination from the skin surface can affect the composition of collected sweat samples.

    Purpose of the Study:

    • To characterize the protease content of human eccrine sweat.
    • To differentiate between proteases originating from the sweat gland and those from epidermal contamination.

    Main Methods:

    • Collection of sweat using simple scraping (SS) and a clean sweat collector (CS).
    • Assay of protease activity using synthetic chromogenic substrates.
    • Electrophoretic separation of sweat proteins to identify gelatinolytic proteinases.

    Main Results:

    Related Experiment Videos

    • Both SS and CS contained proteases, with significantly higher activity in SS.
    • Epidermal contamination was identified as the primary source of elevated protease activity in SS.
    • Clean sweat (CS) contained at least 7 gelatinolytic proteinases, while SS contained at least 15.
    • Two specific proteinases (78 and 25 kDa) were attributed to the sweat secretory coil.

    Conclusions:

    • Epidermal contamination significantly impacts the measured protease activity in scraped sweat samples.
    • Human eccrine sweat contains a distinct set of proteases, with some originating from the sweat duct and secretory coil.
    • Further research is needed to identify the precise function and identity of sweat-derived proteinases.