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Are autoantibodies active players or epiphenomena?
1Department of Internal Medicine III, Allgemeines Krankenhaus, Waehringer Guertel, Wien, Austria.
Current Opinion in Rheumatology
|June 3, 1998
Summary
The role of autoantibodies in rheumatoid arthritis (RA) pathogenesis remains unclear. While some autoantibodies like rheumatoid factors and anti-hnRNP antibodies may be involved, others like anti-collagen antibodies are not, necessitating further research.
Area of Science:
- Immunology
- Rheumatology
- Pathogenesis of Autoimmune Diseases
Background:
- Rheumatoid arthritis (RA) is characterized by various autoantibodies, but their pathogenic role is not fully established.
- Recent findings suggest potential pathogenetic involvement of rheumatoid factors and anti-hnRNP antibodies in RA.
- The exact role of other autoantibodies, such as anti-collagen and anti-Sa antibodies, in RA pathogenesis is still under investigation.
Purpose of the Study:
- To review the current understanding of autoantibody involvement in rheumatoid arthritis (RA) pathogenesis.
- To differentiate between potentially pathogenic and non-pathogenic autoantibodies in RA.
- To highlight areas requiring further research, including T-cell reactivity and experimental models.
Main Methods:
- Review of existing literature on autoantibodies in rheumatoid arthritis.
- Analysis of experimental models and human studies concerning autoantibody pathogenicity.
- Discussion of diagnostic and potential pathogenetic significance of various autoantibodies in RA.
Main Results:
- Rheumatoid factors and anti-hnRNP antibodies (e.g., anti-A2/RA33) show indirect evidence of pathogenetic involvement in RA.
- Antibodies to collagen, despite experimental models, do not appear to be pathogenetic in humans.
- Anticitrullin antibodies demonstrate high predictive value, targeting citrullinated filaggrin, while the Sa antigen remains uncharacterized.
Conclusions:
- The pathogenic role of autoantibodies in RA is complex and not uniformly proven for all identified autoantibodies.
- Autoimmunity to certain autoantigens may mirror crucial events in RA development, warranting further investigation.
- Future studies focusing on T-cell responses and experimental models are essential to elucidate the precise involvement of autoantibodies in RA pathogenesis.