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Langerhans cell and leprosy.

N K Mathur, H N Mangal, D Mathur

    Leprosy in India
    |January 1, 1983
    PubMed
    Summary
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    Langerhans cell (LC) counts are significantly reduced in lepromatous leprosy (LL) and borderline lepromatous (BL) forms. No significant difference was found in Tuberculoid (TT) and borderline Tuberculoid (BT) leprosy compared to healthy individuals.

    Area of Science:

    • Immunology
    • Dermatology
    • Infectious Diseases

    Background:

    • Leprosy is a chronic infectious disease primarily affecting the skin and peripheral nerves.
    • Langerhans cells (LCs) are critical immune cells in the skin's defense against pathogens.
    • Understanding LC dynamics in leprosy is crucial for elucidating disease pathogenesis.

    Purpose of the Study:

    • To quantify Langerhans cell (LC) populations in different forms of leprosy.
    • To compare LC counts between leprosy patients and healthy controls.
    • To investigate the impact of leprosy type and treatment on LC populations.

    Main Methods:

    • A cross-sectional study involving 44 leprosy patients and 12 healthy volunteers.
    • Quantification of LC populations in skin biopsies using cell counting.

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  • Comparison of LC counts across leprosy subtypes (LL, BL, TT, BT) and controls.

    • Main Results:

    • A significant reduction in LC count was observed in lepromatous leprosy (LL) and borderline lepromatous (BL) cases.
    • LC counts in TT and BT leprosy showed no significant difference compared to normal volunteers.
    • Treatment did not influence LC populations in either polar type of leprosy.

    Conclusions:

    • LCs play a role in the pathogenesis of leprosy, with their numbers varying by disease form.
    • The reduction of LCs in LL and BL suggests a potential impairment in immune surveillance.
    • Further research is needed to fully understand the role of LCs in leprosy immunity.