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Autoantibodies within families of patients with systemic lupus erythematosus are not directed against the same nuclear antigens.
- Source :
-
The Journal of rheumatology [J Rheumatol] 2001 Feb; Vol. 28 (2), pp. 284-7. - Publication Year :
- 2001
-
Abstract
- Objective: The presence of antinuclear autoantibodies in systemic lupus erythematosus (SLE) is influenced by genetic factors. The presence of autoantibodies in healthy family members of patients has been reported. Our hypothesis was that autoantibodies are directed against the same antigens in first-degree family members of patients with SLE as in their patient relative.<br />Methods: Plasma was harvested from 50 patients with SLE, 154 unaffected first-degree family members, and 330 healthy controls. Presence of autoantibodies against 14 specific nuclear antigens was tested by the ELISA based line immunoassay INNO-LIA method.<br />Results: Seventy-four percent of patients, 32% of first-degree family members, and 1.5% of healthy controls had antibodies against any nuclear antigen. Most frequent autoantibodies in the patients were anti-histone and anti-SSA, whereas in the family members these were anti-RNP-C and anti-Topo-I/Scl. Presence and specificity of autoantibodies in family members were independent of the presence or absence of that autoantibody in their patient relative (chi-square p > 0.1 for all 14 antigens).<br />Conclusion: Autoantibodies in family members and their patient relatives are not directed against the same nuclear antigens. Thus a familial aspecific dysfunction of the B lymphocyte is the most likely explanation for autoantibody production in SLE.
- Subjects :
- Adult
B-Lymphocytes immunology
Female
Humans
Lupus Erythematosus, Systemic physiopathology
Male
Antibodies, Antinuclear genetics
Antibodies, Antinuclear immunology
Lupus Erythematosus, Systemic genetics
Lupus Erythematosus, Systemic immunology
Nuclear Proteins genetics
Nuclear Proteins immunology
Subjects
Details
- Language :
- English
- ISSN :
- 0315-162X
- Volume :
- 28
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- The Journal of rheumatology
- Publication Type :
- Academic Journal
- Accession number :
- 11246662