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Related Experiment Videos

[Cell biology in endogenous uveitis]

S Nakamura1, M Sugita, O Igai

  • 1Department of Ophthalmology, Yokohama City University School of Medicine.

Nippon Ganka Gakkai Zasshi
|January 22, 1998
PubMed
Summary
This summary is machine-generated.

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T cells in Behçet's disease patients show in vivo activation and resistance to apoptosis, suggesting impaired immune regulation. Targeting tumor necrosis factor-alpha may offer a therapeutic approach for ocular inflammation.

Area of Science:

  • Immunology
  • Ophthalmology
  • Cell Biology

Context:

  • Behçet's disease is a multisystem inflammatory disorder.
  • Ocular involvement, specifically uveoretinitis, is a common and vision-threatening complication.
  • Understanding the immune mechanisms underlying ocular inflammation is crucial for effective treatment.

Purpose:

  • To investigate T cell activation and apoptosis in patients with Behçet's disease and ocular involvement.
  • To explore the role of Fas-ligand and Fas antigen in T cell regulation.
  • To evaluate the potential of targeting tumor necrosis factor-alpha (TNF-alpha) in a rat model of autoimmune uveoretinitis.

Summary:

  • Patients with active Behçet's disease and uveoretinitis exhibit elevated CD69+ T cells, indicating in vivo activation.

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  • T cells from these patients are resistant to apoptosis and activation-induced cell death (AICD) after stimulation.
  • Elevated soluble Fas antigen levels and impaired apoptosis mechanisms are observed in active disease.
  • Experimental autoimmune uveoretinitis (EAU) in rats shows infiltrating cells undergoing apoptosis and elevated TNF-alpha levels.
  • Anti-TNF-alpha antibody treatment suppressed inflammation in the rat model.

    • Impact:

    • The findings highlight aberrant T cell activation and apoptosis as key mechanisms in Behçet's disease-associated ocular inflammation.
    • Results suggest that T cell dysfunction contributes to the persistence of intraocular inflammation.
    • Systemic anti-TNF-alpha therapy shows promise as a treatment strategy for Behçet's disease with ocular involvement.