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In ACPA-positive RA patients, antibodies to EBNA35-58Cit, a citrullinated peptide from the Epstein–Barr nuclear antigen-1, strongly cross-react with the peptide β60-74Cit which bears the immunodominant epitope of citrullinated fibrin
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In ACPA-positive RA patients, antibodies to EBNA35-58Cit, a citrullinated peptide from the Epstein–Barr nuclear antigen-1, strongly cross-react with the peptide β60-74Cit which bears the immunodominant epitope of citrullinated fibrin
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In ACPA-positive RA patients, antibodies to EBNA35-58Cit, a citrullinated peptide from the Epstein–Barr nuclear antigen-1, strongly cross-react with the peptide β60-74Cit which bears the immunodominant epitope of citrullinated fibrin
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Journal Article
In ACPA-positive RA patients, antibodies to EBNA35-58Cit, a citrullinated peptide from the Epstein–Barr nuclear antigen-1, strongly cross-react with the peptide β60-74Cit which bears the immunodominant epitope of citrullinated fibrin
2015
Overview
Although several infectious agents and particularly Epstein–Barr virus (EBV) have been suspected to be involved in aetiology of rheumatoid arthritis (RA), their role still remains elusive. Almost 80 % of RA sera contain antibodies to citrullinated proteins/peptides. Among them, the autoantibodies to citrullinated human fibrinogen (AhFibA) are composed of two non-cross-reactive subsets directed to immunodominant epitopes borne by the α36-50Cit and β60-74Cit fibrin peptides. RA sera also contain antibodies towards the citrullinated EBNA35-58Cit peptide derived from the EBNA-1 protein of EBV. Here, using a large cohort of RA patients and controls, we showed that for a diagnostic specificity of 98.5 %, 47 % of the AhFibA-positive patients were anti-EBNA35-58Cit-positive and that almost all (98.5 %) the anti-EBNA35-58Cit-positive were AhFibA-positive, whereas 86 % were anti-β60-74Cit-positive and only 43 % anti-α36-50Cit-positive. AhFibA, anti-EBNA35-58Cit- and anti-β60-74Cit-antibody titres were significantly correlated. Competition assays showed that anti-EBNA35-58Cit antibodies are highly cross-reactive with the β60-74Cit peptide. The demonstration that a citrullinated peptide derived from the EBNA-1 protein of EBV presents a molecular mimicry with human citrullinated fibrin constitutes an additional argument for a possible role of EBV in RA aetiopathogeny.
Publisher
Springer US,Humana Press
Subject
/ Arthritis, Rheumatoid - immunology
/ Biomedical and Life Sciences
/ Cross Reactions - immunology
/ Diagnostics and Environmental Factors
/ Enzyme-Linked Immunosorbent Assay
/ Epstein-Barr Virus Nuclear Antigens - chemistry
/ Epstein-Barr Virus Nuclear Antigens - immunology
/ Humans
