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A subtype of multiple sclerosis defined by an activated immune defense program.
L G M van Baarsen1, T C T M van der Pouw Kraan, J J Kragt
1Department of Molecular Cell Biology & Immunology, VU Medical Center, Amsterdam, The Netherlands.
Genes and Immunity
|July 14, 2006
Summary
Multiple sclerosis (MS) heterogeneity is reflected in peripheral blood (PB) gene expression. Approximately half of relapsing-remitting MS patients show an activated immune response resembling a virus response program.
Area of Science:
- Immunology
- Genetics
- Neuroscience
Background:
- Multiple sclerosis (MS) is a heterogeneous neurological disease.
- Understanding the molecular basis of MS heterogeneity is crucial for effective treatment.
Purpose of the Study:
- To investigate if peripheral blood (PB) gene expression profiles reflect the heterogeneity observed in multiple sclerosis (MS).
- To identify potential immune response programs associated with MS subtypes.
Main Methods:
- DNA microarray analysis of whole-blood gene expression in 29 relapsing-remitting MS (RRMS) patients and 25 healthy controls.
- Utilized 43K cDNA microarrays and sophisticated pathway-level analysis.
Main Results:
- A spectrum of immune defense genes showed elevated expression in the PB of MS patients compared to controls.
- Cluster analysis identified a sub-population (approx. 50%) of RRMS patients with this gene signature.
- This gene signature was comparable to a virus response program.
Conclusions:
- Peripheral blood cell transcriptional signatures reflect MS heterogeneity.
- A distinct sub-population of RRMS patients exhibits an activated immune defense program resembling a virus response.
- Findings support a potential link between viral infections and MS pathogenesis.