Anti-beta2-glycoprotein I, anti-prothrombin and anticardiolipin antibodies in a longitudinal study of patients with systemic lupus erythematosus and the antiphospholipid syndrome
Abstract
OBJECTIVE: To determine anti-beta2 glycoprotein-I (anti-beta2GPI) and anti-prothrombin (anti-ProT) antibody levels, and the IgG subclass distribution of anti-beta2GPI antibodies, in serial samples from patients with systemic lupus erythematosus (SLE) and antiphospholipid syndrome (APS) having initial or recurrent thrombotic/neurological (T/N) events during the study period. To investigate the correlations between these antibodies and beta2GPI antigen, anticardiolipin antibody (aCL), anti-double-stranded (ds) DNA, C3 levels and disease activity. METHODS: Fifty serum samples were identified from seven patients with SLE who had had T/N events during the follow-up from a cohort under long-term follow-up. IgG anti-beta2GPI, anti-ProT, aCL, IgG subclasses of anti-beta2GPI and beta2GPI antigen levels were determined by ELISA. Corresponding disease activity [British Isles Lupus Assessment Group (BILAG)], anti-dsDNA and C3 levels were compared. RESULTS: IgG anti-beta2GPI antibody levels were elevated in six of the patients before and after the T/N events with less marked fluctuations than aCL antibody levels. The predominant subclass of anti-beta2GPI antibodies was IgG2 before and after the T/N events. IgG anti-ProT antibodies were negative in all cases. There was a significant but weak correlation between anti-beta2GPI and aCL antibodies. No correlation was found between disease activity and IgG anti-beta2GPI antibody and beta2GPI antigen levels. There were fluctuations in beta2GPI antigen levels and a trend to increase after T/N events was observed in some patients. CONCLUSION: Most of the patients with a T/N event during the study period had IgG anti-beta2GPI, but not IgG anti-ProT antibodies. Many IgG aCL-negative samples were found to have IgG anti-beta2GPI activity during the follow-up period. The predominant subclass of IgG anti-beta2GPI was IgG2, which may have importance in the pathogenesis of APS. beta2GPI antigen levels were found to be increased in some patients with SLE after T/N events. IgG anti-beta2GPI antibodies may be used as an adjunctive marker of future T/N events in patients with SLE and APS with aCL antibodies and lupus anticoagulant.
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In SLE, aPL often fluctuate and are often at low or moderate titres, which still confer risk.
“However, in SLE, aPL often fluctuate and are often at low or moderate titres, which still confer risk [41–43].”
From Antiphospholipid patterns predict risk of thrombosis in systemic lupus erythematosus (2021) · cites this paper as [43]
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- Authors
- Inanc, M.
- Venue
- Rheumatology
- Publisher
- Oxford University Press (OUP)
- Published
- 1998-10-01
- Volume
- 37
- Issue
- 10
- Pages
- 1089-1094
- ISSN
- 0263-7103 (ISSN-L)
- 1460-2172
- OpenAlex
- W4322697217
- Cited by
- 42
- References
- 0
- Citations by year
- 2024: 1 · 2021: 2 · 2020: 1 · 2017: 1 · 2016: 2 · 2014: 1 · 2013: 1
- FWCI
- 2.38
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- British journal of rheumatology (publishedVersion)
- PubMed (publishedVersion)
- UCL Discovery (University College London) (submittedVersion)
- PubMed
- Topics
- Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Vasculitis and related conditions
- Health Sciences › Medicine › Pathology and Forensic Medicine › Systemic Sclerosis and Related Diseases
- Keywords
- anti-beta2-glycoprotein I antibodies, anti-prothrombin antibodies, anticardiolipin antibodies, antiphospholipid syndrome, systemic lupus erythematosus, thrombotic complications, neurological events, IgG subclasses, disease activity, lupus anticoagulant
- MeSH terms
- Adult, Antibodies, Antinuclear, Cerebrovascular Disorders, Complement C3, Enzyme-Linked Immunosorbent Assay, Female, Glycoproteins, Humans, Immunoglobulin G, Immunoglobulin M, Longitudinal Studies, Lupus Erythematosus, Systemic, Middle Aged, Prothrombin, Thrombosis, Antiphospholipid Syndrome, Antibodies, Anticardiolipin, beta 2-Glycoprotein I
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