Journal article
Interferon-beta increases systemic BAFF levels in multiple sclerosis without increasing autoantibody production
Institute for Inflammation Research, Department of Rheumatology, Copenhagen University Hospital, Rigshospitalet, Denmark.1
Treatment with interferon-beta (IFN-beta) increases B-cell activating factor of the TNF family (BAFF) expression in multiple sclerosis (MS), raising the concern that treatment of MS patients with IFN-beta may activate autoimmune B cells and stimulate the production of MS-associated autoantibodies. To investigate whether BAFF levels are associated with disease severity/activity in untreated MS patients, and to assess the effect of IFN-beta therapy on circulating BAFF and anti-myelin basic protein (MBP) autoantibody levels.
Twenty-three patients with relapsing-remitting MS (RRMS) were followed longitudinally from initiation of IFN-beta therapy. Their blood levels of BAFF correlated positively at baseline with the expanded disability status scale (p<0.009) and MS severity score (p<0.05), but not with disease activity as determined by the number of gadolinium-enhanced lesions.
The patients were followed for up to 26 months, during which the BAFF levels remained elevated without association to increased disease activity. IFN-beta therapy caused an increase in plasma BAFF levels after both 3 and 6 months of therapy (p<0.002). However, an 11% decrease in IgM and a 33% decrease in IgG anti-MBP autoantibodies (p<0.09 and p<0.009, respectively) was observed after 6 months.
Pre-treatment BAFF levels correlate with high disability scores in MS, suggesting that high BAFF expression is a negative prognostic marker. Despite its known beneficial effects, IFN-beta therapy causes a sustained increase in plasma BAFF levels, which does not translate into increased levels of anti-MBP autoantibodies.
Language: | English |
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Publisher: | SAGE Publications |
Year: | 2011 |
Pages: | 567-577 |
ISSN: | 14770970 and 13524585 |
Types: | Journal article |
DOI: | 10.1177/1352458510393771 |
ORCIDs: | Nielsen, Claus H |
Adult Autoantibodies B-Cell Activating Factor Biomarkers Denmark Disability Evaluation Female Humans Immunologic Factors Interferon beta-1a Interferon-beta MBP protein, human Magnetic Resonance Imaging Male Middle Aged Multiple Sclerosis, Relapsing-Remitting Myelin Basic Protein Severity of Illness Index TNFSF13B protein, human Time Factors Treatment Outcome Up-Regulation Young Adult