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Related Experiment Videos

Systemic T-cell activation in acute clinically isolated optic neuritis.

Hanne Roed1, Jette Frederiksen, Annika Langkilde

  • 1The MS Clinic, Department of Neurology, University of Copenhagen, Glostrup Hospital, DK-2600 Glostrup, Denmark. roeden@dadlnet.dk

Journal of Neuroimmunology
|April 19, 2005
PubMed
Summary

In acute optic neuritis (ON), increased T-cell HLA-DR expression early after onset is linked to better visual outcomes. This suggests a potential protective role for these T cells in ON.

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Area of Science:

  • Immunology
  • Neuro-ophthalmology

Background:

  • Acute monosymptomatic optic neuritis (ON) is an inflammatory demyelinating condition of the optic nerve.
  • Understanding the immunological mechanisms underlying ON is crucial for predicting disease course and visual recovery.

Purpose of the Study:

  • To investigate the expression of T-cell activation markers, specifically HLA-DR and CD45R0, in patients with acute monosymptomatic ON.
  • To correlate these T-cell markers with clinical disease activity and visual function.

Main Methods:

  • Flow cytometry was used to analyze T-cell subsets (CD4 and CD8) in 60 untreated patients with acute ON.
  • Expression levels of HLA-DR and CD45R0 were quantified.
  • Correlations were assessed between marker expression, presence of IgG oligoclonal bands, disease activity, and visual function measures.

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Main Results:

  • Early in ON onset, increased expression of HLA-DR and CD45R0 was observed on both CD4 and CD8 T cells.
  • Higher HLA-DR expression on CD4 T cells was noted in patients lacking IgG oligoclonal bands.
  • HLA-DR expression on CD4 and CD8 T cells negatively correlated with disease activity and positively with visual function. CD45R0 expression on CD4 T cells showed a negative correlation with disease activity.

Conclusions:

  • The findings suggest that HLA-DR expression on T cells may indicate a subset of T cells with a protective role in optic neuritis.
  • These immunological markers could potentially serve as biomarkers for disease prognosis and visual recovery in ON patients.