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Título: | Peptides Bearing Multiple Post-Translational Modifications as Antigenic Targets for Severe Rheumatoid Arthritis Patients |
Autor: | García-Moreno, Cristina CSIC ORCID; Gómara Elena, María José CSIC ORCID; Castellanos-Moreira, Raúl; Sanmartí, Raimon; Haro Villar, Isabel CSIC ORCID | Palabras clave: | ELISA Autoantibodies Chimeric peptides Erosive disease Interstitial lung disease Post-translational modifications Rheumatoid arthritis Synthetic peptides |
Fecha de publicación: | 10-dic-2021 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | International Journal of Molecular Sciences 22 (24): 13290 (2021) | Resumen: | Rheumatoid arthritis (RA) is characterized by the presence of autoantibodies that are of paramount importance for the diagnosis and prognosis of the disease and have been implicated in its pathogenesis. Proteins resulting from post-translational modifications (PTMs) are capable of triggering autoimmune responses important for the development of RA. In this work, we investigate serum antibody reactivity in patients with an established RA against a panel of chimeric peptides derived from fibrin and filaggrin proteins and bearing from one to three PTMs (citrullination, carbamylation and acetylation) by home-designed ELISA tests (anti-AMPA autoantibodies). The role of anti-AMPAs as biomarkers linked to the presence of a more severe RA phenotype (erosive disease with radiological structural damage) and to the presence of interstitial lung disease (ILD), a severe extra-articular manifestation in RA patients entailing a high mortality, was also analyzed. In general, the association with the clinical phenotype of RA was confirmed with the different autoantibodies, and especially for IgA and IgM isotypes. The prevalence of severe joint damage was only statistically significant for the IgG isotype when working with the peptide bearing three PTMs. Furthermore, the median titers were significantly higher in patients with RA-ILD, a finding not observed for the IgG isotype when working with the single- and double-modified peptides. | URI: | http://hdl.handle.net/10261/257567 | DOI: | 10.3390/ijms222413290 | ISSN: | 16616596 |
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