Cited by 37Systemic Lupus Erythematosus ResearchGlycosylation and Glycoproteins ResearchBlood Coagulation and Thrombosis Mechanisms

The Pathogenicity of Anti-β 2GP1-IgG Autoantibodies Depends on Fc Glycosylation

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Fickentscher, Christoph, Magorivska, Iryna, Janko, Christina, Biermann, Mona, Bilyy, Rostyslav, Nalli, Cecilia, Tincani, Angela, Medeghini, Veronica +6 more·2015·Journal of Immunology Research

Abstract

To analyze the glycosylation of anti-β 2GP1, we investigated purified IgG from healthy children, patients with APS, and asymptomatic adult carriers of antiphospholipid antibodies. We observed that in the sera of healthy children and of patients with APS, IgG3 and IgG2 were predominant, respectively. The potentially protective anti-β 2GP1-IgM was lower in the sera of healthy children. Although anti-β 2GP1-associated C1q did not differ between children and patients with antiphospholipid syndrome, the associated C3c was significantly higher in the sera of healthy children. This indicates a more efficient clearance of anti-β 2GP1 immune complexes in the healthy children. This clearance is not accompanied by inflammation or coagulatory events. It is likely that the most important pathogenic factor of the anti-β 2GP1-IgG is related to the different glycosylation observed in healthy and diseased individuals. We detected a significantly higher sialylation of anti-β 2GP1-IgG isolated from the sera of healthy children and asymptomatic adults when compared with that of patients with clinically apparent antiphospholipid syndrome. Low sialylated IgG reportedly ameliorates inflammation and inflammation promotes hyposialylation. Thus, both reactions create a vicious circle that precipitates the pathology of the antiphospholipid syndrome including thrombus-formation. We conclude that the increased sialylation of anti-β 2GP1-IgG of sera of healthy individuals limits their pathogenicity.

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Authors
Fickentscher, C., Magorivska, I., Janko, C., Biermann, M., Bilyy, R., Nalli, C., Tincani, A., Medeghini, V., Meini, A., Nimmerjahn, F., Schett, G., Muñoz, L. E., Andreoli, L., & Herrmann, M.
Affiliations
  • Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
  • National Academy of Sciences of Ukraine (UA)
  • Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia (IT)
  • Rheumatology and Clinical Immunology, Department of Clinical and Experimental Sciences, Spedali Civili and University of Brescia, Piazzale Spedali Civili 1, 25123 Brescia, Italy
  • Department for Internal Medicine 3, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Ulmenweg 18, 91054 Erlangen, Germany
Venue
Journal of Immunology Research
Publisher
Wiley
Published
2015
Volume
2015
Pages
1-12
ISSN
  • 2314-7156 (ISSN-L)
  • 2314-8861
OpenAlex
W1603173612
Cited by
37
References
55
Citations by year
2024: 1 · 2023: 1 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 2 · 2018: 9 · 2017: 5 · 2016: 8 · 2015: 1
FWCI
6.44
Type
journal article
Language
en
Open access
Locations
  • Journal of Immunology Research (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Institutional Research Information System (Università degli Studi di Brescia) (submittedVersion, other-oa)
Funders
  • Deutsche Forschungsgemeinschaft
  • Friedrich-Alexander-Universität Erlangen-Nürnberg
  • K. und R. Wucherpfennig-Stiftung
Topics
  • Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
antiphospholipid syndrome, Fc glycosylation, sialylation, IgG subclasses, immune complexes, C3c, C1q, thrombosis, autoantibody pathogenicity, children
MeSH terms
Adolescent, Autoantibodies, Child, Child, Preschool, Enzyme-Linked Immunosorbent Assay, Female, Glycosylation, Humans, Immunoglobulin G, Immunoglobulin M, Immunoglobulin Fc Fragments, Infant, Infant, Newborn, Male, Complement C1q, Complement C3c, Case-Control Studies, Antiphospholipid Syndrome, Antibodies, Antiphospholipid, beta 2-Glycoprotein I

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