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Th1 cytokines in oral lichen planus

Ambereen Khan1, Camile S Farah, Neil W Savage

  • 1Oral Biology and Pathology, The University of Queensland, St Lucia, Brisbane, Queensland, Australia.

Journal of Oral Pathology & Medicine : Official Publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology
|January 25, 2003
PubMed

Insights

Oral lichen planus (OLP) involves CD8+ T-cells and cytokines like interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α). These findings suggest a T helper 1 immune response promoting cytotoxic T-cell activity in OLP.

Area of Science:

  • Immunology
  • Oral Pathology

Background:

  • Cell-mediated immunity in oral lichen planus (OLP) is influenced by cytokines and their receptors.
  • Understanding these interactions is crucial for OLP pathogenesis.

Purpose of the Study:

  • To investigate the role of cytokines and their receptors in cell-mediated immune responses in OLP.
  • To characterize the immune cell infiltrate and cytokine expression profiles in OLP lesions.

Main Methods:

  • In situ cytokine expression was analyzed using immunohistochemistry.
  • In vitro cytokine secretion from OLP lesional T cells was assessed via ELISA.
  • Immune cell populations were identified using CD markers (CD4+, CD8+).

Main Results:

  • CD8+ T-cells were the predominant mononuclear cells in OLP lesions, with some adjacent to degenerating keratinocytes.
  • IFN-γ and TNF-α were expressed by mononuclear cells and keratinocytes, with basal keratinocytes showing continuous TNF-α expression.
  • OLP T-cells secreted IFN-γ in vitro, which was modulated by TNF-α stimulation; IL-4, IL-10, and TGF-β1 were not detected.

Conclusions:

  • The data indicate a T helper 1 (Th1) immune response in OLP.
  • This Th1 response may drive CD8+ cytotoxic T-cell activity, contributing to OLP development.
Abstract

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