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The ciliated human keratinocyte.

R Elofsson, A Andersson, B Falck

    Journal of Ultrastructure Research
    |June 1, 1984
    PubMed
    Summary
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    Human basal keratinocytes possess single cilia, which diminish towards the skin surface. Cilia were absent in nickel-allergic dermatitis, warranting further investigation into their role.

    Area of Science:

    • Dermatology
    • Cell Biology
    • Skin Physiology

    Background:

    • Keratinocytes form the epidermis, the skin's primary protective layer.
    • The role of primary cilia in epidermal homeostasis is an emerging area of research.

    Purpose of the Study:

    • To investigate the presence and distribution of single cilia in human keratinocytes.
    • To explore potential alterations in ciliary structure in specific skin conditions.

    Main Methods:

    • Human skin samples from normal, occluded, and psoriatic conditions were analyzed.
    • Immunofluorescence microscopy was used to detect cilia on keratinocytes.
    • A case of nickel-allergic dermatitis (patch test) was examined for ciliary presence.

    Main Results:

    Related Experiment Videos

    • Single cilia were identified on nearly all basal keratinocytes across different skin states.
    • Ciliary structure showed progressive reduction in keratinocytes closer to the skin surface.
    • No cilia remnants were observed in the granular layer of the epidermis.
    • Keratinocytes in a nickel-allergic dermatitis case lacked cilia.

    Conclusions:

    • Basal human keratinocytes typically feature a single cilium.
    • Cilia undergo structural changes during keratinocyte differentiation.
    • The absence of cilia in nickel-allergic dermatitis suggests a potential role in this condition, requiring further study.