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Analysis of a sequenced cDNA library from multiple sclerosis lesions
K G Becker1, D H Mattson, J M Powers
1Molecular Immunology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda MD, USA.
Journal of Neuroimmunology
|July 1, 1997
Summary
Researchers identified genes in multiple sclerosis (MS) central nervous system lesions, revealing immune activation and autoantigens linked to other autoimmune disorders. Aberrant autoantigen expression may drive MS pathogenesis.
Area of Science:
- Neuroimmunology
- Molecular Biology
- Genetics
Background:
- Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system (CNS).
- Understanding the molecular mechanisms of MS pathogenesis is crucial for developing effective treatments.
Purpose of the Study:
- To identify genes expressed in CNS lesions of a patient with primary progressive MS.
- To investigate the role of aberrant autoantigen expression in MS pathogenesis.
Main Methods:
- Construction and analysis of a normalized cDNA library from MS CNS lesions.
- Automated DNA sequencing to generate expressed sequence tags (ESTs).
- Comparison of MS lesion library with an adult brain library.
Main Results:
- Identified 54 cDNAs associated with immune activation, indicating an ongoing inflammatory response.
- Found 16 cDNAs encoding autoantigens linked to other autoimmune disorders, with only 3 present in the adult brain library.
- Discovered two cDNAs mapping to an MS susceptibility locus (5p14-p12), including an excitatory amino acid transporter and a homologue of the Drosophila disabled gene.
Conclusions:
- Aberrant autoantigen expression in MS lesions may contribute to secondary autoimmune stimulation and the inflammatory response.
- The identified genes and susceptibility loci provide new insights into the molecular biology of MS pathogenesis.
- This molecular approach may illuminate previously unappreciated aspects of MS disease mechanisms.