1. Lifetime risk of rheumatoid arthritis-associated interstitial lung disease in MUC5B mutation carriers
- Author
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FinnGen Rheumatology Clinical Expe, Palomaki, Antti, Palotie, Aarno, Koskela, Jukka, Eklund, Kari K., Pirinen, Matti, Ripatti, Samuli, Laitinen, Tarja, Mars, Nina, Institute for Molecular Medicine Finland, Centre of Excellence in Complex Disease Genetics, Aarno Palotie / Principal Investigator, Genomics of Neurological and Neuropsychiatric Disorders, Complex Disease Genetics, HUS Helsinki and Uusimaa Hospital District, HUS Inflammation Center, Department of Medicine, Statistical and population genetics, Department of Mathematics and Statistics, Biostatistics Helsinki, Department of Public Health, and Samuli Olli Ripatti / Principal Investigator
- Subjects
rheumatoid arthritis ,pulmonary fibrosis ,PULMONARY-FIBROSIS ,3121 General medicine, internal medicine and other clinical medicine ,respiratory system ,genetic ,behavioral disciplines and activities ,respiratory tract diseases ,polymorphism - Abstract
Objectives To estimate lifetime risk of developing rheumatoid arthritis-associated interstitial lung disease (RA-ILD) with respect to the strongest known risk factor for pulmonary fibrosis, a MUC5B promoter variant. Methods FinnGen is a collection of epidemiological cohorts and hospital biobank samples, integrating genetic data with up to 50 years of follow-up within nationwide registries in Finland. Patients with RA and ILD were identified from the Finnish national hospital discharge, medication reimbursement and cause-of-death registries. We estimated lifetime risks of ILD by age 80 with respect to the common variant rs35705950, a MUC5B promoter variant. Results Out of 293 972 individuals, 1965 (0.7%) developed ILD by age 80. Among all individuals in the dataset, MUC5B increased the risk of ILD with a HR of 2.44 (95% CI: 2.22 to 2.68). Out of 6869 patients diagnosed with RA, 247 (3.6%) developed ILD. In patients with RA, MUC5B was a strong risk factor of ILD with a HR similar to the full dataset (HR: 2.27, 95% CI: 1.75 to 2.95). In patients with RA, lifetime risks of ILD were 16.8% (95% CI: 13.1% to 20.2%) for MUC5B carriers and 6.1% (95% CI: 5.0% to 7.2%) for MUC5B non-carriers. The difference between risks started to emerge at age 65, with a higher risk among men. Conclusion Our findings provide estimates of lifetime risk of RA-ILD based on MUC5B mutation carrier status, demonstrating the potential of genomics for risk stratification of RA-ILD.
- Published
- 2021