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We began analyzing https://link.springer.com/article/10.1007/s10067-006-0275-5, but it redirected us to https://link.springer.com/article/10.1007/s10067-006-0275-5. The analysis below is for the second page.

Title[redir]:
Autoantibodies in rheumatoid arthritis: association with severity of disease in established RA | Clinical Rheumatology
Description:
Introduction: Autoantibodies in rheumatoid arthritis (RA) are useful both for diagnosis and prognosis. Antibodies directed against citrullinated antigens have recently been shown to predict development of RA as well as poor outcome in early arthritis. Data on their role in established RA is limited. We studied the association of various autoantibodies in RA with its severity. Materials and methods: A total of one hundred and twenty nine-patients with established RA was enrolled and sera were collected and stored at −70°C. Data regarding erosions, deformities, and extra-articular features were collected. IgM rheumatoid factor (RF) was measured using nephelometry and value above 20 U was considered positive. IgA RF was measured by enzyme-linked immunosorbent assay (ELISA) and value above the mean±2 SD of normal healthy control was taken as positive. Anti-keratin antibody (AKA) was detected by indirect immunofluorescence assay using rat esophagus as substrate. Anti-cyclic citrullinated peptide (CCP) antibodies were measured by commercial ELISA and a value above 5 U was considered as positive. Results: The prevalence of various autoantibodies was: IgM RF 82.2%, anti-CCP antibodies 82.2%, AKA 51.9%, and anti IgA RF 45%. The concordance rate of anti-CCP antibodies with IgM RF was 83%, with AKA 68%, and with IgA RF 60.5%. All but one patient positive for AKA were positive for anti-CCP antibodies. The presence of IgM RF, AKA, and anti-CCP antibody was associated with joint erosions and deformities. None of the antibodies had any association with presence of extra-articular features. No association of IgA RF was seen with erosions, deformities, or extra-articular features. Among 23 seronegative RA patients, 11 were positive for anti-CCP antibodies and 6 were AKA positive. The presence of anti-CCP antibodies was associated with presence of deformities (p<0.05). Conclusion: Anti-CCP antibodies are present in majority of patients with established RA including seronegative patients. Both anti-CCP and AKA, in addition to conventional marker like IgM RF, are associated with severe erosive disease.

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Keywords {🔍}

rheumatoid, arthritis, article, google, scholar, pubmed, cas, antibodies, anticcp, rheum, patients, autoantibodies, early, van, dis, disease, rheumatol, ann, outcome, factor, positive, iga, aka, clinical, association, severity, aggarwal, igm, access, privacy, cookies, content, data, rheumatology, established, misra, citrullinated, presence, factors, prognostic, publish, search, amita, deformities, extraarticular, antikeratin, antibody, seronegative, meyer, study,

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month download article/chapter ramnath misra & amita aggarwal early inflammatory arthritis juvenile rheumatoid arthritis enzyme-linked immunosorbent assay anti-cyclic citrullinated peptide anti-citrullinated protein antibodies early rheumatoid arthritis—onset full article pdf ccp high sensitive cyclic citrullinated peptide privacy choices/manage cookies seronegative rheumatoid arthritis de jong baw anti-keratin antibody anti-ccp antibody early rheumatoid arthritis related subjects worsening clinical variables anti-ccp antibodies 82 anti-ccp antibodies anti-keratin antibodies van riel pl van venrooij wj indirect immunofluorescence assay iga rheumatoid factor van leuween ma van rijswijk mh european economic area normal healthy control vimentin-derived acpa antigenic determinants recognized article agrawal extra-articular features extra-articular manifestatations igm rheumatoid factor conditions privacy policy classical risk factors iga rheumatoid factors severe erosive disease accepting optional cookies check access instant access community-recruited patients main content log year radiographic damage article log early arthritis rheumatoid arthritis year prospective study

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         headline:Autoantibodies in rheumatoid arthritis: association with severity of disease in established RA
         description: Introduction: Autoantibodies in rheumatoid arthritis (RA) are useful both for diagnosis and prognosis. Antibodies directed against citrullinated antigens have recently been shown to predict development of RA as well as poor outcome in early arthritis. Data on their role in established RA is limited. We studied the association of various autoantibodies in RA with its severity. Materials and methods: A total of one hundred and twenty nine-patients with established RA was enrolled and sera were collected and stored at −70°C. Data regarding erosions, deformities, and extra-articular features were collected. IgM rheumatoid factor (RF) was measured using nephelometry and value above 20 U was considered positive. IgA RF was measured by enzyme-linked immunosorbent assay (ELISA) and value above the mean±2 SD of normal healthy control was taken as positive. Anti-keratin antibody (AKA) was detected by indirect immunofluorescence assay using rat esophagus as substrate. Anti-cyclic citrullinated peptide (CCP) antibodies were measured by commercial ELISA and a value above 5 U was considered as positive. Results: The prevalence of various autoantibodies was: IgM RF 82.2%, anti-CCP antibodies 82.2%, AKA 51.9%, and anti IgA RF 45%. The concordance rate of anti-CCP antibodies with IgM RF was 83%, with AKA 68%, and with IgA RF 60.5%. All but one patient positive for AKA were positive for anti-CCP antibodies. The presence of IgM RF, AKA, and anti-CCP antibody was associated with joint erosions and deformities. None of the antibodies had any association with presence of extra-articular features. No association of IgA RF was seen with erosions, deformities, or extra-articular features. Among 23 seronegative RA patients, 11 were positive for anti-CCP antibodies and 6 were AKA positive. The presence of anti-CCP antibodies was associated with presence of deformities (p<0.05). Conclusion: Anti-CCP antibodies are present in majority of patients with established RA including seronegative patients. Both anti-CCP and AKA, in addition to conventional marker like IgM RF, are associated with severe erosive disease.
         datePublished:2006-03-30T00:00:00Z
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      headline:Autoantibodies in rheumatoid arthritis: association with severity of disease in established RA
      description: Introduction: Autoantibodies in rheumatoid arthritis (RA) are useful both for diagnosis and prognosis. Antibodies directed against citrullinated antigens have recently been shown to predict development of RA as well as poor outcome in early arthritis. Data on their role in established RA is limited. We studied the association of various autoantibodies in RA with its severity. Materials and methods: A total of one hundred and twenty nine-patients with established RA was enrolled and sera were collected and stored at −70°C. Data regarding erosions, deformities, and extra-articular features were collected. IgM rheumatoid factor (RF) was measured using nephelometry and value above 20 U was considered positive. IgA RF was measured by enzyme-linked immunosorbent assay (ELISA) and value above the mean±2 SD of normal healthy control was taken as positive. Anti-keratin antibody (AKA) was detected by indirect immunofluorescence assay using rat esophagus as substrate. Anti-cyclic citrullinated peptide (CCP) antibodies were measured by commercial ELISA and a value above 5 U was considered as positive. Results: The prevalence of various autoantibodies was: IgM RF 82.2%, anti-CCP antibodies 82.2%, AKA 51.9%, and anti IgA RF 45%. The concordance rate of anti-CCP antibodies with IgM RF was 83%, with AKA 68%, and with IgA RF 60.5%. All but one patient positive for AKA were positive for anti-CCP antibodies. The presence of IgM RF, AKA, and anti-CCP antibody was associated with joint erosions and deformities. None of the antibodies had any association with presence of extra-articular features. No association of IgA RF was seen with erosions, deformities, or extra-articular features. Among 23 seronegative RA patients, 11 were positive for anti-CCP antibodies and 6 were AKA positive. The presence of anti-CCP antibodies was associated with presence of deformities (p<0.05). Conclusion: Anti-CCP antibodies are present in majority of patients with established RA including seronegative patients. Both anti-CCP and AKA, in addition to conventional marker like IgM RF, are associated with severe erosive disease.
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