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- W2109485592 abstract "Objective To investigate whether citrullinated proteins within the atherosclerotic plaque can be targeted by anti–citrullinated protein antibodies (ACPAs), forming stimulatory immune complexes that propagate the progression of atherosclerosis. Methods Protein lysates prepared from atherosclerotic segments of human aorta were assessed for the presence of citrulline‐modified proteins, and specifically citrullinated fibrinogen (Cit‐fibrinogen), by immunoprecipitation and/or immunoblotting followed by mass spectrometry. Immunohistochemical analysis of coronary artery plaque was performed to determine the presence of citrullinated proteins and peptidylarginine deiminase type 4 (PAD‐4). Serum levels of anti–cyclic citrullinated peptide (anti‐CCP), anti–citrullinated vimentin (anti–Cit‐vimentin), and anti–Cit‐fibrinogen antibodies were measured in 134 women with seropositive rheumatoid arthritis; these subjects had previously been characterized for the presence of subclinical atherosclerosis, by electron beam computed tomography scanning. Results Western blot analysis of atherosclerotic plaque lysates demonstrated several citrullinated proteins, and the presence of Cit‐fibrinogen was confirmed by immunoprecipitation and mass spectrometry. Immunohistochemical analysis showed colocalization of citrullinated proteins and PAD‐4 within the coronary artery plaque. In age‐adjusted regression models, antibodies targeting Cit‐fibrinogen and Cit‐vimentin, but not CCP‐2, were associated with an increased aortic plaque burden. Conclusion Citrullinated proteins are prevalent within atherosclerotic plaques, and certain ACPAs are associated with the atherosclerotic burden. These observations suggest that targeting of citrullinated epitopes, specifically Cit‐fibrinogen, within atherosclerotic plaques could provide a mechanism for the accelerated atherosclerosis observed in patients with RA." @default.
- W2109485592 created "2016-06-24" @default.
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- W2109485592 date "2013-07-01" @default.
- W2109485592 modified "2023-10-07" @default.
- W2109485592 title "Brief Report: Citrullination Within the Atherosclerotic Plaque: A Potential Target for the Anti-Citrullinated Protein Antibody Response in Rheumatoid Arthritis" @default.
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- W2109485592 doi "https://doi.org/10.1002/art.37961" @default.
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