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Low CSF CD4/CD8+ T-cell proportions are associated with blood-CSF barrier dysfunction in limbic encephalitis

Niels Hansen1, Kerstin Schwing2, Demet Önder2

  • 1Department of Epileptology, University of Bonn Medical Center, Venusberg - Campus 1, 53127 Bonn, Germany; Department of Psychiatry and Psychotherapy, University of Goettingen, Von-Siebold-Straße 5, 37075 Goettingen, Germany..

Epilepsy & Behavior : E&B
|December 18, 2019
PubMed

Insights

Investigating immune cells in limbic encephalitis (LE) reveals altered T-cell ratios in temporal lobe epilepsy (TLE) patients. These findings highlight potential biomarkers for central nervous system inflammation and disease mechanisms.

Area of Science:

  • Neuroscience
  • Immunology
  • Neurology

Background:

  • Autoimmune limbic encephalitis (LE) is a severe neurological condition.
  • Understanding the immune cell involvement in LE pathophysiology is crucial for developing targeted therapies.
  • Temporal lobe epilepsy (TLE) with LE presents unique challenges in diagnosis and treatment.

Purpose of the Study:

  • To analyze immune cell profiles in patients with TLE and LE.
  • To identify immune signatures associated with LE in TLE patients.
  • To explore the role of immune cells in the central nervous system (CNS) inflammation in LE.

Main Methods:

  • Study included 68 patients with TLE-LE and 7 controls with TLE.
  • Patients were categorized by seizure onset (early vs. late).
  • Flow cytometry was used for peripheral blood (PB) and cerebrospinal fluid (CSF) analysis, alongside EEG, MRI, and neuropsychological assessments.

Main Results:

  • A higher CD4/8+ T-cell ratio was observed in the PB of TLE-LE patients compared to controls.
  • Patients with TLE-LE and blood-CSF barrier dysfunction showed a lower CD4/CD8+ T-cell ratio in CSF.
  • Statistical significance was determined using Kruskal-Wallis ANOVA with Dunn's test (p < 0.05).

Conclusions:

  • The proportion of T-cells in CSF may be linked to CNS inflammation in LE patients with blood-CSF barrier dysfunction.
  • Flow cytometry provides valuable insights into LE pathogenesis and symptoms.
  • The CD4/8+ T-cell ratio in PB warrants further investigation as a potential biomarker for LE.
Abstract

Keywords:
AutoimmunityB-cellsBlood–CSF barrierLimbic encephalitisT-cellsTemporal lobe epilepsy

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