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Related Experiment Videos

Nail changes in alopecia areata: light and electron microscopy.

M Laporte1, J André, F Stouffs-Vanhoof

  • 1Cliniques Dermatologiques, Hôpitaux Universitaires Saint-Pierre et Brugmann, Brussels, Belgium.

Archives of Dermatological Research
|January 1, 1988
PubMed
Summary

Alopecia areata (AA) patients exhibit distinct nail keratin changes, including slits and parakeratosis, visible under microscopy. These nail abnormalities suggest a significant underlying issue with nail matrix keratinization in individuals with AA.

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Area of Science:

  • Dermatology
  • Pathology
  • Nail Biology

Background:

  • Alopecia areata (AA) is an autoimmune condition causing hair loss.
  • Nail changes are frequently observed in patients with AA, but their specific nature and origin are not fully understood.

Purpose of the Study:

  • To investigate the microscopic changes in nail keratin fragments from patients with alopecia areata.
  • To identify specific ultrastructural alterations in nail keratin associated with AA.

Main Methods:

  • Nail keratin fragments were collected from AA patients using tweezers.
  • Samples were analyzed using both light microscopy and electron microscopy.

Main Results:

  • Light microscopy revealed nail changes such as slits, cupuliform dips, and parakeratosis, predominantly in the nail plate's upper region.

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  • Electron microscopy showed vacuoles, keratin fiber depletion, and electron-dense fibrillary deposits.
  • Subungual keratin remained largely unaffected, indicating a localized issue.

    • Conclusions:

    • The observed nail keratin alterations suggest a significant disorder in matrix keratinization in AA patients.
    • Further biochemical and immunological studies are needed to elucidate the role of keratin fibers, interfilamentary matrix, and the filaggrin system.