A Prospective Study of the Development of Inflammatory Arthritis in the Family Members of Indigenous North American People With Rheumatoid Arthritis
| Autor: | Stacy Tanner, Xiaobo Meng, Jeremy Sokolove, William H. Robinson, Lauren J. Lahey, Elizabeth D. Ferucci, Brenden Dufault, Irene Smolik, Vidyanand Anaparti, Hani El-Gabalawy, David B. Robinson, Carol A. Hitchon |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Adult Male medicine.medical_specialty Canada Inflammatory arthritis Immunology Arthritis Anti-Citrullinated Protein Antibodies Arthritis Rheumatoid 03 medical and health sciences 0302 clinical medicine Rheumatology Rheumatoid Factor Internal medicine medicine Prevalence Immunology and Allergy Rheumatoid factor Humans Family Genetic Predisposition to Disease Longitudinal Studies Prospective Studies Prospective cohort study Autoantibodies 030203 arthritis & rheumatology business.industry Incidence (epidemiology) Incidence Autoantibody medicine.disease Alaskan Natives 030104 developmental biology Rheumatoid arthritis Cohort Indians North American Female business Alaska |
| Zdroj: | Arthritisrheumatology (Hoboken, N.J.)References. 71(9) |
| ISSN: | 2326-5205 |
| Popis: | Objective To determine the incidence of inflammatory arthritis and autoantibody prevalence in Indigenous North American people. Methods Unaffected relatives of Indigenous North Americans with rheumatoid arthritis (RA) from central Canada and Alaska were systematically monitored from 2005 to 2017. Rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPAs) were tested at every visit, and a subset was tested for ACPA fine specificity using a custom multiplex assay. Multistate models based on all available study visits were developed to determine the likelihood of transitioning between autoantibody states, or to inflammatory arthritis. Results Eighteen of 374 relatives (4.8%) developed inflammatory arthritis during follow-up (after a mean ± SD of 4.7 ± 2.4 years), yielding a transition rate of 9.2 cases/1,000 person-years. Thirty percent of those who developed inflammatory arthritis were seronegative at baseline, but all were seropositive at inflammatory arthritis onset. Although 30% of ACPA/RF double-seropositive individuals developed inflammatory arthritis (after 3.2 ± 2.2 years), the majority of these individuals did not develop inflammatory arthritis. Multistate modeling indicated a 71% and 68% likelihood of ACPA and RF seropositive states, respectively, reverting to a seronegative state after 5 years, and a 39% likelihood of an ACPA/RF double-seropositive state becoming seronegative. Fine specificity testing demonstrated an expansion of the ACPA repertoire prior to the development of inflammatory arthritis. Conclusion Despite a high incidence of inflammatory arthritis in this cohort of at-risk relatives of Indigenous North Americans with RA, a large proportion of autoantibody-positive individuals do not develop inflammatory arthritis and revert back to an autoantibody-negative state. |
| Databáze: | OpenAIRE |
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