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Peripheral blood lymphocyte populations and phagocytic functions in patients with active alopecia areata

J Luckac1, B Burek, Z Kusić

  • 1Department of Nuclear Medicine and Oncology, Sestre milosrdnice University Hospital, Zagreb, Croatia.

Acta Medica Croatica : Casopis Hravatske Akademije Medicinskih Znanosti
|January 1, 1993
PubMed

Insights

Alopecia areata (AA) patients show altered immune cell levels, including decreased CD8+ T-cells and impaired monocyte function. Topical steroid therapy may influence these changes, suggesting potential autoimmune involvement in AA.

Area of Science:

  • Immunology
  • Dermatology
  • Autoimmune Diseases

Background:

  • Alopecia areata (AA) is an autoimmune condition affecting hair follicles.
  • Immune system dysregulation is implicated in the pathogenesis of AA.

Purpose of the Study:

  • To investigate peripheral blood lymphocyte populations and monocyte functions in patients with active AA.
  • To compare immune parameters between therapy-free patients, those on topical steroid therapy, and healthy controls.

Main Methods:

  • Flow cytometry was used to determine proportions of CD3+, CD4+, CD8+, CD16+, and CD26+ lymphocytes.
  • Monocyte phagocytic ability (ingestion and intracellular killing) was assessed.
  • Analysis included 29 active AA patients (14 therapy-free, 15 on topical steroids) and 30 healthy controls.

Main Results:

  • AA patients exhibited decreased CD8+ T-cells and an increased CD4/CD8 ratio compared to controls.
  • Monocyte microbicidal capacity was reduced in AA patients.
  • CD8+ T-cell percentage normalized with therapy, but the CD4/CD8 ratio remained elevated.
  • Monocyte ingestion and microbicidal capacity were impaired in patients on steroid therapy.

Conclusions:

  • Alterations in lymphocyte populations support an autoimmune basis for AA.
  • Impaired monocyte functions in treated patients are likely a side effect of steroid therapy rather than the disease itself.

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