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Apoptosis mediators fasL and TRAIL are upregulated in peripheral blood mononuclear cells in MS

Huang W-X1, M P Huang, M A Gomes

  • 1Department of Neurology, Karolinska Institute at Huddinge University Hospital, Sweden. Wen-xin.Huang@neurotec.ki.se

Neurology
|November 4, 2000
PubMed
Abstract

Insights

This study found increased expression of Fas ligand (FasL) and TNF-related apoptosis-inducing ligand (TRAIL) in patients with multiple sclerosis (MS). Further research is needed to determine if this impacts the autoimmune process in MS.

Area of Science:

  • Immunology
  • Neuroscience
  • Molecular Biology

Background:

  • Dysregulation of apoptosis, a key process in immune cell regulation, is implicated in autoimmune diseases like multiple sclerosis (MS).
  • Inadequate apoptosis may lead to the persistence of autoreactive immune cells, contributing to MS pathogenesis.

Purpose of the Study:

  • To investigate the expression levels of apoptosis-inducing ligand and receptor molecules in individuals diagnosed with MS.
  • To explore the role of apoptosis-related molecules in the context of MS.

Main Methods:

  • Quantification of messenger RNA (mRNA) for Fas ligand (FasL), TNF-related apoptosis-inducing ligand (TRAIL), and their receptors (Fas, TRAIL-R2) using competitive reverse transcription PCR.
  • Analysis was performed on peripheral blood mononuclear cells from 47 untreated MS patients and 46 healthy controls.

Main Results:

  • Significantly increased expression of FasL mRNA was observed in MS patients, particularly in the relapsing-remitting MS subgroup during remission.
  • TRAIL mRNA levels were also upregulated in MS patients compared to controls, with no significant differences between clinical subgroups.
  • TRAIL-R2 expression was slightly elevated in MS patients, while Fas expression remained similar between groups. Differences in TRAIL-R2 isoforms (TRICK2a/TRICK2b) were noted in MS patients.

Conclusions:

  • Peripheral blood lymphocytes in MS patients exhibit elevated expression of FasL and TRAIL.
  • The clinical significance of this increased expression requires further investigation to ascertain if it promotes autoimmunity or acts as a compensatory anti-inflammatory mechanism.

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