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HLA DRB1*1501 and intrathecal inflammation in multiple sclerosis
F Sellebjerg1, J Jensen, H O Madsen
1Department of Neurology, University of Copenhagen, Glostrup Hospital, Denmark. sellebjerg@dadlnet.dk
Tissue Antigens
|June 14, 2000
Summary
The human leukocyte antigen (HLA) DRB1*1501 haplotype is linked to increased multiple sclerosis (MS) risk. This study found DRB1*1501 is associated with higher cerebrospinal fluid inflammation and altered T-cell activation in MS patients.
Area of Science:
- Neuroimmunology
- Genetics of Multiple Sclerosis
Background:
- CD4 T cells play a key role in multiple sclerosis (MS) pathogenesis.
- The human leukocyte antigen (HLA) DRB1*1501 haplotype is a known risk factor for MS in Northern European populations.
- Previous research suggests DRB1*1501 may influence T-cell and B-cell responses, cytokine production, or immunoglobulin synthesis.
Purpose of the Study:
- To investigate the role of the HLA DRB1*1501 haplotype in the pathogenesis of multiple sclerosis (MS).
- To assess intrathecal inflammation and T-cell phenotypes in MS patients with and without the DRB1*1501 haplotype.
Main Methods:
- Studied intrathecal inflammation using cerebrospinal fluid (CSF) IgG synthesis levels and matrix metalloproteinase-9 (MMP-9) activity.
- Analyzed T-cell phenotypes in CSF, specifically focusing on HLA-DR and CD25 expression.
- Compared findings between MS patients with and without the DRB1*1501 haplotype.
Main Results:
- DRB1*1501 presence was associated with significantly higher levels of intrathecal inflammation, indicated by increased IgG synthesis and MMP-9 activity.
- Patients positive for DRB1*1501 exhibited a lower percentage of CSF T cells expressing HLA-DR without co-expressing CD25.
- These findings suggest a link between DRB1*1501 and specific inflammatory and T-cell activation patterns in MS.
Conclusions:
- Enhanced intrathecal inflammation, evidenced by elevated IgG synthesis and MMP-9 activity, is linked to the DRB1*1501 haplotype in MS.
- Altered T-cell activation status, characterized by reduced HLA-DR/CD25 co-expression, may also contribute to MS susceptibility in DRB1*1501-positive individuals.
- The DRB1*1501 haplotype appears to influence MS pathogenesis through mechanisms involving increased intrathecal inflammation and modified T-cell responses.