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Related Experiment Videos

Auto-oxidative damage in cement dermatitis.

Y Miyachi, K Uchida, J Komura

    Archives of Dermatological Research
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    Patients with severe cement dermatitis have increased oxygen intermediates (OIs) due to polymorphonuclear leukocytes (PMNs). Dapsone treatment reduced OIs and improved dermatitis, suggesting a defective superoxide dismutase (SOD) capacity contributes to this skin condition.

    Area of Science:

    • Dermatology
    • Immunology
    • Biochemistry

    Background:

    • Stimulated polymorphonuclear leukocytes (PMNs) generate oxygen intermediates (OIs) that cause auto-oxidative tissue damage during inflammation.
    • Cement dermatitis is a chronic inflammatory skin condition linked to occupational exposure.

    Purpose of the Study:

    • To investigate the role of OIs and superoxide dismutase (SOD) activity in cement dermatitis.
    • To evaluate the clinical efficacy of dapsone in treating cement dermatitis by modulating OI levels.

    Main Methods:

    • Assessed OI generation by PMNs in patients with cement dermatitis and healthy controls.
    • Measured SOD activity in skin tissues.
    • Clinically evaluated the effect of dapsone treatment on dermatitis and OI levels.

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    Main Results:

    • PMNs from patients with severe cement dermatitis showed markedly increased OI generation compared to controls.
    • Cement workers without dermatitis had slightly increased OI generation but enhanced SOD activity.
    • Dapsone treatment significantly decreased OI generation and improved clinical symptoms in patients.
    • Patients with cement dermatitis had normal SOD activity despite increased OI generation.

    Conclusions:

    • Severe cement dermatitis may result from a defective capacity to enhance SOD activity, leading to impaired removal of PMN-derived OIs and subsequent tissue injury.
    • Dapsone is a clinically effective treatment for cement dermatitis, likely by reducing OI levels.