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van der Woude D, Toes REM. Immune response to post-translationally modified proteins in rheumatoid arthritis: what makes it special? Ann Rheum Dis 2024; 83:838-846. [PMID: 38378236 DOI: 10.1136/ard-2023-224103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 02/01/2024] [Indexed: 02/22/2024]
Abstract
Rheumatoid arthritis (RA) exhibits common characteristics with numerous other autoimmune diseases, including the presence of susceptibility genes and the presence of disease-specific autoantibodies. Anti-citrullinated protein antibodies (ACPA) are the hallmarking autoantibodies in RA and the anti-citrullinated protein immune response has been implicated in disease pathogenesis. Insight into the immunological pathways leading to anti-citrullinated protein immunity will not only aid understanding of RA pathogenesis, but may also contribute to elucidation of similar mechanisms in other autoantibody-positive autoimmune diseases. Similarly, lessons learnt in other human autoimmune diseases might be relevant to understand potential drivers of RA. In this review, we will summarise several novel insights into the biology of the anti-citrullinated protein response and their clinical associations that have been obtained in recent years. These insights include the identification of glycans in the variable domain of ACPA, the realisation that ACPA are polyreactive towards other post-translational modifications on proteins, as well as new awareness of the contributing role of mucosal sites to the development of the ACPA response. These findings will be mirrored to emerging concepts obtained in other human (autoimmune) disease characterised by disease-specific autoantibodies. Together with an updated understanding of genetic and environmental risk factors and fresh perspectives on how the microbiome could contribute to antibody formation, these advancements coalesce to a progressively clearer picture of the B cell reaction to modified antigens in the progression of RA.
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Affiliation(s)
| | - René E M Toes
- Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
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Hughes-Austin JM, Katz R, Majka DS, Criqui MH, Robinson WH, Firestein GS, Hundley WG, Ix JH. Serum reactivity to citrullinated protein/peptide antigens and left ventricular structure and function in the Multi-Ethnic Study of Atherosclerosis (MESA). PLoS One 2023; 18:e0291967. [PMID: 37874814 PMCID: PMC10597499 DOI: 10.1371/journal.pone.0291967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 09/10/2023] [Indexed: 10/26/2023] Open
Abstract
BACKGROUND Antibodies to citrullinated protein antigens have been linked to altered left ventricular (LV) structure and function in patients with rheumatoid arthritis (RA). Serum reactivity to several citrullinated protein/peptide antigens has been identified in RA, which are detectable years before RA onset and in individuals who may never develop RA. Among community-living individuals without heart failure (HF) at baseline in the Multi-Ethnic Study of Atherosclerosis (MESA), we investigated associations between serum reactivity to citrullinated protein/peptide antigens, LV mass, LV ejection fraction (LVEF), and incident HF. METHODS Among 1232 MESA participants, we measured serum reactivity to 28 different citrullinated proteins/peptides using a multiplex bead-based array. Each antibody was defined as having extremely high reactivity (EHR) if >95th percentile cut-off in MESA. Number of EHR antibody responses to citrullinated protein/peptide antigens were summed for each participant (range 0-28). LV mass(g) and LVEF(%) were measured on cardiac MRI. Associations between EHR antibodies and LV mass and LVEF were evaluated using linear regression. Cox proportional hazards models were used to evaluate associations between EHR antibodies and incident HF during 11 years of follow-up, adjusting for age, gender, race/ethnicity, smoking status, systolic blood pressure, use of anti-hypertensive medications, self-reported arthritis, IL-6, body surface area, and estimated glomerular filtration rate. RESULTS Mean age was 65±10, 50% were female, 40% were White, 21% were Black, 26% were Hispanic/Latino, and 14% were Chinese. Twenty-seven percent of MESA participants had extremely high reactivity to ≥ 1 citrullinated protein/peptide antigen. In fully adjusted analysis, every additional EHR antibody was significantly associated with 0.1% lower LVEF (95% CI: -0.17%, -0.02%). No association was observed with LV mass (β per additional EHR antibody) = 0.13±0.15 (p = 0.37)). Neither the presence nor number of EHR antibodies was associated with incident HF during follow-up (HR per additional EHR antibody = 1.008 (95% CI: 0.97, 1.05)). CONCLUSION Greater number of extremely highly reactive antibodies was associated with lower LVEF, but not with LV mass or incident HF. Thus, serum reactivity to citrullinated protein/peptide antigens was associated with subtle subclinical changes in myocardial contractility, but the significance in relation to clinically apparent HF is uncertain.
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Affiliation(s)
- Jan M. Hughes-Austin
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, California, United States of America
| | - Ronit Katz
- Department of Obstetrics & Gynecology, University of Washington, Seattle, Washington, United States of America
| | - Darcy S. Majka
- Division of Rheumatology, DuPage Medical Group, Chicago, Illinois, United States of America
| | - Michael H. Criqui
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, California, United States of America
| | - William H. Robinson
- Division of Immunology and Rheumatology, Stanford University, Stanford, California, United States of America
- VA Palo Alto Health Care System, Palo Alto, California, United States of America
| | - Gary S. Firestein
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, University of California, San Diego, La Jolla, California, United States of America
| | - W. Gregory Hundley
- Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Joachim H. Ix
- Division of Nephrology-Hypertension, Department of Medicine, University of California, San Diego, La Jolla, California, United States of America
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Duquenne L, Hensor EM, Wilson M, Garcia-Montoya L, Nam JL, Wu J, Harnden K, Anioke IC, Di Matteo A, Chowdhury R, Sidhu N, Ponchel F, Mankia K, Emery P. Predicting Inflammatory Arthritis in At-Risk Persons: Development of Scores for Risk Stratification. Ann Intern Med 2023; 176:1027-1036. [PMID: 37523695 DOI: 10.7326/m23-0272] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND Inflammatory arthritis (IA) is an immune-related condition defined by the presence of clinical synovitis. Its most common form is rheumatoid arthritis. OBJECTIVE To develop scores for predicting IA in at-risk persons using multidimensional biomarkers. DESIGN Prospective observational cohort study. SETTING Single-center, Leeds, United Kingdom. PARTICIPANTS Persons with new musculoskeletal symptoms, a positive test result for anticitrullinated protein antibodies, and no clinical synovitis and followed for 48 weeks or more or until IA occurred. MEASUREMENTS A simple score was developed using logistic regression, and a comprehensive score was developed using the least absolute shrinkage and selection operator Cox proportional hazards regression. Internal validation with bootstrapping was estimated, and a decision curve analysis was done. RESULTS Of 455 participants, 32.5% (148 of 455) developed IA, and 15.4% (70 of 455) developed it within 1 year. The simple score identified 249 low-risk participants with a false negative rate of 5% (and 206 high-risk participants with a false-positive rate of 72%). The comprehensive score identified 119 high-risk participants with a false-positive rate of 29% (and 336 low-risk participants with a false-negative rate of 19%); 40% of high-risk participants developed IA within 1 year and 71% within 5 years. LIMITATIONS External validation is required. Recruitment occurred over 13 years, with lower rates of IA in later years. There was geographic variation in laboratory testing and recruitment availability. CONCLUSION The simple score identified persons at low risk for IA who were less likely to need secondary care. The comprehensive score identified high-risk persons who could benefit from risk stratification and preventive measures. Both scores may be useful in clinical care and should also be useful in clinical trials. PRIMARY FUNDING SOURCE National Institute for Health and Care Research Leeds Biomedical Research Centre.
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Affiliation(s)
- Laurence Duquenne
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Elizabeth M Hensor
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Michelle Wilson
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Leticia Garcia-Montoya
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Jacqueline L Nam
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Jianhua Wu
- Leeds Institute for Data Analytics, University of Leeds, Leeds, and Wolfson Institute of Population Health, Queen Mary University of London, London, United Kingdom (J.W.)
| | - Kate Harnden
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Innocent Chidi Anioke
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, United Kingdom, and Department of Medical Laboratory Sciences, University of Nigeria, Nigeria (I.C.A.)
| | - Andrea Di Matteo
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Rahaymin Chowdhury
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Navkiran Sidhu
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Frederique Ponchel
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, United Kingdom (F.P.)
| | - Kulveer Mankia
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
| | - Paul Emery
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, and NIHR Leeds Biomedical Research Centre, Leeds, United Kingdom (L.D., E.M.H., M.W., L.G., J.L.N., K.H., A.D.M., R.C., N.S., K.M., P.E.)
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Tang B, Liu Q, Ilar A, Wiebert P, Hägg S, Padyukov L, Klareskog L, Alfredsson L, Jiang X. Occupational inhalable agents constitute major risk factors for rheumatoid arthritis, particularly in the context of genetic predisposition and smoking. Ann Rheum Dis 2023; 82:316-323. [PMID: 36600175 PMCID: PMC9933179 DOI: 10.1136/ard-2022-223134] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 10/27/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVES To assess the effects of occupational inhalable exposures on rheumatoid arthritis (RA) development and their interactions with smoking and RA-risk genes, stratifying by presence of anticitrullinated protein antibodies (ACPA). METHODS Data came from the Swedish Epidemiological Investigation of RA, consisting of 4033 incident RA cases and 6485 matched controls. Occupational histories were retrieved, combining with a Swedish national job-exposure matrix, to estimate exposure to 32 inhalable agents. Genetic data were used to define Genetic Risk Score (GRS) or carrying any copy of human leucocyte antigen class II shared epitope (HLA-SE) alleles. Associations were identified with unconditional logistical regression models. Attributable proportion due to interaction was estimated to evaluate presence of interaction. RESULTS Exposure to any occupational inhalable agents was associated with increased risk for ACPA-positive RA (OR 1.25, 95% CI 1.12 to 1.38). The risk increased as number of exposed agents increased (Ptrend<0.001) or duration of exposure elongated (Ptrend<0.001). When jointly considering exposure to any occupational inhalable agents, smoking and high GRS, a markedly elevated risk for ACPA-positive RA was observed among the triple-exposed group compared with those not exposed to any (OR 18.22, 95% CI 11.77 to 28.19). Significant interactions were found between occupational inhalable agents and smoking/genetic factors (high GRS or HLA-SE) in ACPA-positive RA. CONCLUSIONS Occupational inhalable agents could act as important environmental triggers in RA development and interact with smoking and RA-risk genes leading to excessive risk for ACPA-positive RA. Future studies are warranted to assess preventive strategies aimed at reducing occupational hazards and smoking, especially among those who are genetically vulnerable.
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Affiliation(s)
- Bowen Tang
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Qianwen Liu
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Anna Ilar
- Department for Knowledge-Based Policy of Health Care, National Board of Health and Welfare, Stockholm, Sweden
| | - Pernilla Wiebert
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden,Centre for Occupational and Environmental Medicine, Region Stockholm, Stockholm, Sweden
| | - Sara Hägg
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Leonid Padyukov
- Division of Rheumatology, Department of Medicine and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Klareskog
- Division of Rheumatology, Department of Medicine and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Alfredsson
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden .,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Occupational and Environmental Medicine, Region Stockholm, Stockholm, Sweden
| | - Xia Jiang
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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5
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Rheumatoid arthritis and non-coding RNAs; how to trigger inflammation. Life Sci 2023; 315:121367. [PMID: 36639050 DOI: 10.1016/j.lfs.2023.121367] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/31/2022] [Accepted: 12/31/2022] [Indexed: 01/12/2023]
Abstract
Rheumatoid arthritis (RA) is a systemic and chronic inflammatory disease categorized by continuous synovitis in the joints and systemic inflammatory responses that can cause lifelong disability. The major cause of RA is the dysregulation of the immune response. The development of RA disease includes multiplex association of several interleukins and cells, which leads to synovial cell growth, cartilage and bone damage. The primary stage of RA disease is related to the modification of both the innate and adaptive immune systems, which leads to the formation of autoantibodies. This process results in many damaged molecules and epitope spreading. Both the innate (e.g., dendritic cells, macrophages, and neutrophils) and acquired immune cells (e.g., T and B lymphocytes) will increase and continue the chronic inflammatory condition in the next stages of the RA disease. In recent years, non-coding RNAs have been proved as significant controllers of biological functions, especially immune cell expansion and reactions. Non-coding RNAs were primarily containing microRNA (miRNA), long non-coding RNA (lncRNA), and circular RNA (circRNA). Various studies confirmed non-coding RNAs as hopeful markers for diagnosing and curing RA. This review will describe and cover existing knowledge about RA pathogenesis, which might be favorable for discovering possible ncRNA markers for RA.
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Bieber K, Hundt JE, Yu X, Ehlers M, Petersen F, Karsten CM, Köhl J, Kridin K, Kalies K, Kasprick A, Goletz S, Humrich JY, Manz RA, Künstner A, Hammers CM, Akbarzadeh R, Busch H, Sadik CD, Lange T, Grasshoff H, Hackel AM, Erdmann J, König I, Raasch W, Becker M, Kerstein-Stähle A, Lamprecht P, Riemekasten G, Schmidt E, Ludwig RJ. Autoimmune pre-disease. Autoimmun Rev 2023; 22:103236. [PMID: 36436750 DOI: 10.1016/j.autrev.2022.103236] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 11/17/2022] [Indexed: 11/27/2022]
Abstract
Approximately 5% of the world-wide population is affected by autoimmune diseases. Overall, autoimmune diseases are still difficult to treat, impose a high burden on patients, and have a significant economic impact. Like other complex diseases, e.g., cancer, autoimmune diseases develop over several years. Decisive steps in the development of autoimmune diseases are (i) the development of autoantigen-specific lymphocytes and (often) autoantibodies and (ii) potentially clinical disease manifestation at a later stage. However, not all healthy individuals with autoantibodies develop disease manifestations. Identifying autoantibody-positive healthy individuals and monitoring and inhibiting their switch to inflammatory autoimmune disease conditions are currently in their infancy. The switch from harmless to inflammatory autoantigen-specific T and B-cell and autoantibody responses seems to be the hallmark for the decisive factor in inflammatory autoimmune disease conditions. Accordingly, biomarkers allowing us to predict this progression would have a significant impact. Several factors, such as genetics and the environment, especially diet, smoking, exposure to pollutants, infections, stress, and shift work, might influence the progression from harmless to inflammatory autoimmune conditions. To inspire research directed at defining and ultimately targeting autoimmune predisease, here, we review published evidence underlying the progression from health to autoimmune predisease and ultimately to clinically manifest inflammatory autoimmune disease, addressing the following 3 questions: (i) what is the current status, (ii) what is missing, (iii) and what are the future perspectives for defining and modulating autoimmune predisease.
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Affiliation(s)
- Katja Bieber
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Jennifer E Hundt
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Xinhua Yu
- Priority Area Chronic Lung Diseases, Research Center Borstel, Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Borstel, Germany
| | - Marc Ehlers
- Institute of Nutritional Medicine, University of Lübeck and University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Frank Petersen
- Priority Area Chronic Lung Diseases, Research Center Borstel, Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Borstel, Germany
| | - Christian M Karsten
- Institute for Systemic Inflammation Research, University of Lübeck, 23562 Lübeck, Germany
| | - Jörg Köhl
- Institute for Systemic Inflammation Research, University of Lübeck, 23562 Lübeck, Germany; Division of Immunobiology, Cincinnati Children's Hospital and University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Khalaf Kridin
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany; Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel; Unit of Dermatology and Skin Research Laboratory, Baruch Padeh Medical Center, Poriya, Israel
| | - Kathrin Kalies
- Institute of Anatomy, University of Lübeck, Lübeck, Germany
| | - Anika Kasprick
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Stephanie Goletz
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Jens Y Humrich
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Rudolf A Manz
- Institute for Systemic Inflammation Research, University of Lübeck, 23562 Lübeck, Germany
| | - Axel Künstner
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Christoph M Hammers
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | - Reza Akbarzadeh
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Hauke Busch
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany
| | | | - Tanja Lange
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Hanna Grasshoff
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Alexander M Hackel
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Jeanette Erdmann
- Institute of Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany
| | - Inke König
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany
| | - Walter Raasch
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Lübeck, Germany
| | - Mareike Becker
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Anja Kerstein-Stähle
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Peter Lamprecht
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Gabriela Riemekasten
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Enno Schmidt
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany; Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Ralf J Ludwig
- Lübeck Institute of Experimental Dermatology and Center for Research on Inflammation of the Skin, University of Lübeck, Germany.
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Chudek A, Kotyla P, Mossakowska M, Grodzicki T, Zdrojewski T, Olszanecka-Glinianowicz M, Chudek J, Owczarek AJ. The Prevalence of Anticitrullinated Protein Antibodies in Older Poles-Results from a Population-Based PolSenior Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:14216. [PMID: 36361095 PMCID: PMC9655192 DOI: 10.3390/ijerph192114216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Little is known about the occurrence of antibodies in older subjects. We analyzed the prevalence of anticitrullinated protein antibodies (anti-CCP) in a representative cohort of Polish older adults, participants of PolSenior substudy. Randomly selected 1537 serum samples of community-dwelling participants aged 65 and over. Questionnaires were completed by qualified interviewers and laboratory assessments served as a database for this analysis. The frequency of anti-CCP seropositivity (N = 50) was estimated at 3.25% (95% CI: 2.45-4.30%), being higher among women-4.05% (2.83-5.73%) than men-2.41% (1.48-3.86%). The frequency of anti-CCP seropositivity was decreasing with age from 4.29% in aged 65-74 years and 4.07% in 70-84 years to 1.50% in aged 85 years or above (p < 0.05). Hypoalbuminemia, inflammatory status (C-reactive protein >10 mg/dL or interleukin-6 ≥10 pg/mL), and female gender were associated with increased, while age ≥85 years with decreased risk of seropositivity. Multivariable logistic regression revealed that hypoalbuminemia, inflammatory status, and age ≥85 years were independently associated factors of anti-CCP seropositivity. The decreased frequency of anti-CCP seropositivity in the oldest old suggests shorter survival of the seropositive individuals who developed rheumatoid arthritis. It seems that low symptomatic RA remains frequently undiagnosed in older subjects.
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Affiliation(s)
- Anna Chudek
- Health Promotion and Obesity Management Unit, Department of Pathophysiology, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, 40-752 Katowice, Poland
| | - Przemysław Kotyla
- Department of Internal Medicine, Rheumatology and Clinical Immunology, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, 40-635 Katowice, Poland
| | - Małgorzata Mossakowska
- Study on Ageing and Longevity, International Institute of Molecular and Cell Biology, 02-109 Warsaw, Poland
| | - Tomasz Grodzicki
- Department of Internal Medicine and Gerontology, Jagiellonian University Medical College, 31-531 Krakow, Poland
| | - Tomasz Zdrojewski
- Division of Preventive Medicine and Education, Medical University of Gdansk, 80-211 Gdansk, Poland
| | - Magdalena Olszanecka-Glinianowicz
- Health Promotion and Obesity Management Unit, Department of Pathophysiology, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, 40-752 Katowice, Poland
| | - Jerzy Chudek
- Department of Internal Medicine and Oncological Chemotherapy, Medical University of Silesia, 40-029 Katowice, Poland
| | - Aleksander J. Owczarek
- Health Promotion and Obesity Management Unit, Department of Pathophysiology, Faculty of Medical Sciences in Katowice, Medical University of Silesia in Katowice, 40-752 Katowice, Poland
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8
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From risk to chronicity: evolution of autoreactive B cell and antibody responses in rheumatoid arthritis. Nat Rev Rheumatol 2022; 18:371-383. [PMID: 35606567 DOI: 10.1038/s41584-022-00786-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2022] [Indexed: 02/07/2023]
Abstract
The presence of disease-specific autoantibody responses and the efficacy of B cell-targeting therapies in rheumatoid arthritis (RA) indicate a pivotal role for B cells in disease pathogenesis. Important advances have shaped our understanding of the involvement of autoantibodies and autoreactive B cells in the disease process. In RA, autoantibodies target antigens with a variety of post-translational modifications such as carbamylation, acetylation and citrullination. B cell responses against citrullinated antigens generate anti-citrullinated protein antibodies (ACPAs), which are themselves modified in the variable domains by abundant N-linked glycans. Insights into the induction of autoreactive B cells against antigens with post-translational modifications and the development of autoantibody features such as isotype usage, epitope recognition, avidity and glycosylation reveal their relationship to particular RA risk factors and clinical phenotypes. Glycosylation of the ACPA variable domain, for example, seems to predict RA onset in ACPA+ healthy individuals, possibly because it affects B cell receptor signalling. Moreover, ACPA-expressing B cells show dynamic phenotypic changes and develop a continuously proliferative and activated phenotype that can persist in patients who are in drug-induced clinical remission. Together, these findings can be integrated into a conceptual framework of immunological autoreactivity in RA, delineating how it develops and persists and why disease activity recurs when therapy is tapered or stopped.
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9
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Sokolova MV, Schett G, Steffen U. Autoantibodies in Rheumatoid Arthritis: Historical Background and Novel Findings. Clin Rev Allergy Immunol 2022; 63:138-151. [PMID: 34495490 PMCID: PMC9464122 DOI: 10.1007/s12016-021-08890-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2021] [Indexed: 01/13/2023]
Abstract
Autoantibodies represent a hallmark of rheumatoid arthritis (RA), with the rheumatoid factor (RF) and antibodies against citrullinated proteins (ACPA) being the most acknowledged ones. RA patients who are positive for RF and/or ACPA ("seropositive") in general display a different etiology and disease course compared to so-called "seronegative" patients. Still, the seronegative patient population is very heterogeneous and not well characterized. Due to the identification of new autoantibodies and advancements in the diagnosis of rheumatic diseases in the last years, the group of seronegative patients is constantly shrinking. Aside from antibodies towards various post-translational modifications, recent studies describe autoantibodies targeting some native proteins, further broadening the spectrum of recognized antigens. Next to the detection of new autoantibody groups, much research has been done to answer the question if and how autoantibodies contribute to the pathogenesis of RA. Since autoantibodies can be detected years prior to RA onset, it is a matter of debate whether their presence alone is sufficient to trigger the disease. Nevertheless, there is gathering evidence of direct autoantibody effector functions, such as stimulation of osteoclastogenesis and synovial fibroblast migration in in vitro experiments. In addition, autoantibody positive patients display a worse clinical course and stronger radiographic progression. In this review, we discuss current findings regarding different autoantibody types, the underlying disease-driving mechanisms, the role of Fab and Fc glycosylation and clinical implications.
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Affiliation(s)
- Maria V. Sokolova
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Universitätstrasse 25a, 91054 Erlangen, Germany ,Deutsches Zentrum Für Immuntherapie, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Georg Schett
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Universitätstrasse 25a, 91054 Erlangen, Germany ,Deutsches Zentrum Für Immuntherapie, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Ulrike Steffen
- Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Universitätstrasse 25a, 91054 Erlangen, Germany ,Deutsches Zentrum Für Immuntherapie, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
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10
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He J, Ju J, Wang X. The current status of anti-citrullinated protein antibodies and citrullinated protein-reactive B cells in the pathogenesis of rheumatoid arthritis. Mol Biol Rep 2021; 49:2475-2485. [PMID: 34855107 DOI: 10.1007/s11033-021-07034-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 11/26/2021] [Indexed: 11/26/2022]
Abstract
Anti-citrullinated protein antibodies are a hallmark of rheumatoid arthritis. It is widely acknowledged that the presence of ACPAs is the result of the interaction of genes, the environment and epigenetic modifications. The mechanism by which the factors, especially citrullination and ACPA glycosylation, affect ACPAs is still unclear. In this article, we review the presence of the ACPAs in RA and their relationship with clinical manifestations. The pathogenicity of ACPAs and B cells in RA was also summarized. A growing body of evidence has shown that ACPA-positive patients have more serious bone erosion and destruction and poor clinical prognosis than ACPA-negative patients. Recently, with the direct study of citrullinated protein-reactive B cells, their role in the development of rheumatoid arthritis has been further understood. It indicates that further understanding of the mechanism of ACPAs and CP-reactive B cells would beneficial in the prevention and treatment of RA.
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Affiliation(s)
- Jia He
- School of Clinical Medicine, Weifang Medical University, Weifang, China
| | - JiYu Ju
- Department of Immunology, Weifang Medical University, Weifang, China
| | - XiaoDong Wang
- Department of Rheumatology and Immunology, Affiliated Hospital of Weifang Medical University, Weifang, China.
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11
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Kissel T, van Wesemael TJ, Lundquist A, Kokkonen H, Kawakami A, Tamai M, van Schaardenburg D, Wuhrer M, Huizinga TW, Scherer HU, van der Woude D, Rantapää-Dahlqvist S, Toes REM. Genetic predisposition (HLA-SE) is associated with ACPA-IgG variable domain glycosylation in the predisease phase of RA. Ann Rheum Dis 2021; 81:141-143. [PMID: 34385139 DOI: 10.1136/annrheumdis-2021-220841] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 07/29/2021] [Indexed: 11/04/2022]
Affiliation(s)
- Theresa Kissel
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Tineke J van Wesemael
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Heidi Kokkonen
- Department of Public Health and Clinical Medicine/Rheumatology, Umea University, Umea, Sweden
| | - Atsushi Kawakami
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Mami Tamai
- Department of Immunology and Rheumatology Graduate School of Biomedical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Dirkjan van Schaardenburg
- Department of Rheumatology, Amsterdam UMC, Academic Medical Center, Amsterdam, The Netherlands.,Department of Rheumatology, Reade, Amsterdam Rheumatology and Immunology Center, Amsterdam, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Tom Wj Huizinga
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans Ulrich Scherer
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Diane van der Woude
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - René E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
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12
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Wouters F, Maurits MP, van Boheemen L, Verstappen M, Mankia K, Matthijssen XME, Dorjée AL, Emery P, Knevel R, van Schaardenburg D, Toes REM, van der Helm-van Mil AHM. Determining in which pre-arthritis stage HLA-shared epitope alleles and smoking exert their effect on the development of rheumatoid arthritis. Ann Rheum Dis 2021; 81:48-55. [PMID: 34285049 DOI: 10.1136/annrheumdis-2021-220546] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 07/07/2021] [Indexed: 11/03/2022]
Abstract
OBJECTIVES The human leukocyte antigen-shared epitope (HLA-SE) alleles and smoking are the most prominent genetic and environmental risk factors for rheumatoid arthritis (RA). However, at which pre-arthritis stage (asymptomatic/symptomatic) they exert their effect is unknown. We aimed to determine whether HLA-SE and smoking are involved in the onset of autoantibody positivity, symptoms (clinically suspect arthralgia (CSA)) and/or progression to clinical arthritis. METHODS We performed meta-analyses on results from the literature on associations of HLA-SE and smoking with anti-citrullinated protein antibodies (ACPAs) in the asymptomatic population. Next, we studied associations of HLA-SE and smoking with autoantibody positivity at CSA onset and with progression to clinical inflammatory arthritis (IA) during follow-up. Associations in ACPA-positive patients with CSA were validated in meta-analyses with other arthralgia cohorts. Analyses were repeated for rheumatoid factor (RF), anti-carbamylated protein antibodies (anti-CarP) and anti-acetylated protein antibodies (AAPA). RESULTS Meta-analyses showed that HLA-SE is not associated with ACPA positivity in the asymptomatic population (OR 1.06 (95% CI:0.69 to 1.64)), whereas smoking was associated (OR 1.37 (95% CI: 1.15 to 1.63)). At CSA onset, both HLA-SE and smoking associated with ACPA positivity (OR 2.08 (95% CI: 1.24 to 3.49), OR 2.41 (95% CI: 1.31 to 4.43)). During follow-up, HLA-SE associated with IA development (HR 1.86 (95% CI: 1.23 to 2.82)), in contrast to smoking. This was confirmed in meta-analyses in ACPA-positive arthralgia (HR 1.52 (95% CI: 1.08 to 2.15)). HLA-SE and smoking were not associated with RF, anti-CarP or AAPA-positivity at CSA onset. Longitudinally, AAPA associated with IA development independent from ACPA and RF (HR 1.79 (95% CI: 1.02 to 3.16)), anti-CarP did not. CONCLUSIONS HLA-SE and smoking act at different stages: smoking confers risk for ACPA and symptom development, whereas HLA-SE mediates symptom and IA development. These data enhance the understanding of the timing of the key risk factors in the development of RA.
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Affiliation(s)
- Fenne Wouters
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Marc P Maurits
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Laurette van Boheemen
- Department of Rheumatology, Amsterdam Rheumatology and Immunology Center, Reade, Amsterdam, The Netherlands
| | - Marloes Verstappen
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Kulveer Mankia
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK
- NIHR Leeds Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | | | - Annemarie L Dorjée
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Paul Emery
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK
- NIHR Leeds Biomedical Research Unit, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Rachel Knevel
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Dirkjan van Schaardenburg
- Department of Rheumatology, Amsterdam Rheumatology and Immunology Center, Reade, Amsterdam, The Netherlands
| | - René E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Annette H M van der Helm-van Mil
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Rheumatology, Erasmus Medical Center, Rotterdam, The Netherlands
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13
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Toes RE, Raza K. The autoimmune response as a potential target for tolerance induction before the development of rheumatoid arthritis. THE LANCET. RHEUMATOLOGY 2021; 3:e214-e223. [PMID: 38279384 DOI: 10.1016/s2665-9913(20)30445-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 01/28/2024]
Abstract
Rheumatoid arthritis is a chronic inflammatory disease that affects the synovial joints. Although treatment options and efficacy have increased substantially in the past two decades, the disease cannot be cured or prevented. Therefore, rheumatoid arthritis still has a considerable effect on the quality of life of patients, not only because life-long medication is often required, but also because residual disease activity leads to progressive loss of function in the musculoskeletal system and extra-articular morbidity. Key future goals in the management of rheumatoid arthritis are the ability to induce long-lasting drug-free remission in patients with the disease (ie, to achieve a cure), and to prevent disease before it emerges. To reach these goals, it is pivotal to understand the autoimmune response underlying rheumatoid arthritis pathogenesis and to develop ways to permanently silence it (ie, to induce tolerance). For preventive studies, the identification of markers (clinical, immunological, and biological) predictive of future disease is crucial, as prevention of disease will not be feasible without the ability to identify relevant at-risk target populations. In this Series paper, we review the autoimmune response underlying rheumatoid arthritis, how rheumatoid arthritis-specific autoimmunity develops and evolves during the transition from health to disease, and how tolerance studies could be designed to achieve prevention or cure of the disease.
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Affiliation(s)
- Rene Em Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands.
| | - Karim Raza
- Research into Inflammatory Arthritis Centre Versus Arthritis and MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, Institute of Inflammation and Ageing, University of Birmingham, Queen Elizabeth Hospital, Birmingham, UK; Department of Rheumatology, Sandwell and West Birmingham NHS Trust, Birmingham, UK
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14
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Improved classification of rheumatoid arthritis with a score including anti-acetylated ornithine antibodies. Sci Rep 2020; 10:19263. [PMID: 33159095 PMCID: PMC7648756 DOI: 10.1038/s41598-020-73919-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/18/2020] [Indexed: 12/11/2022] Open
Abstract
The presence of rheumatoid factor (RF) or anti-cyclic citrullinated peptide (anti-CCP) autoantibodies contributes to the current rheumatoid arthritis (RA) classification criteria. These criteria involve stratification on antibody levels, which limits reproducibility, and underperform in the RA patients without RF and anti-CCP. Here, we have explored if two anti-acetylated peptide antibodies (AAPA), anti-acetylated lysine (AcLys) and anti-acetylated ornithine (AcOrn), could improve the performance of the current criteria. The analysis was done in 1062 prospectively-followed early arthritis (EA) patients. The anti-AcOrn were more informative than the anti-AcLys, the conventional RA antibodies and the anti-carbamylated protein antibodies. The anti-AcOrn produced a classification that did not require antibody levels and showed improved specificity (77.6% vs. 72.6%, p = 0.003) and accuracy (79.0% vs. 75.8%, p = 0.002) over the current criteria. These improvements were obtained with a scoring system that values concordance between anti-AcOrn, RF and anti-CCP. No significant gain was obtained in sensitivity (80.2% vs. 78.8%, p = 0.25) or in improving the classification of the RA patients lacking RF and anti-CCP, although the anti-AcOrn ranked first among the analysed new antibodies. Therefore, the anti-AcOrn antibodies could contribute to the improvement of RA classification criteria by exploiting antibody concordance.
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15
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Iwasaki T, Nakabo S, Terao C, Murakami K, Nakashima R, Hashimoto M, Imura Y, Yukawa N, Yoshifuji H, Miura Y, Yurugi K, Maekawa T, van Delft MAM, Trouw LA, Fujii T, Mimori T, Ohmura K. Long-term follow-up of patients with anti-cyclic citrullinated peptide antibody-positive connective tissue disease: a retrospective observational study including information on the HLA-DRB1 allele and citrullination dependency. Arthritis Res Ther 2020; 22:248. [PMID: 33076960 PMCID: PMC7574466 DOI: 10.1186/s13075-020-02351-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 10/08/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The anti-cyclic citrullinated peptide (CCP) antibody is a diagnostic biomarker of rheumatoid arthritis (RA). However, some non-RA connective tissue disease (CTD) patients also test positive for the anti-CCP antibody and, thus, may ultimately develop RA. We retrospectively investigated whether anti-CCP-positive non-RA CTD patients developed RA and attempted to identify factors that may differentiate RA-overlapping CTD from pure CTD. METHODS In total, 842 CTD patients with a primary diagnosis that was not RA were selected from our CTD database as of December 2012. Anti-CCP antibody titers were obtained from a retrospective chart review or measured using stored sera. RA was diagnosed according to the 1987 revised American College of Rheumatology classification criteria. Thirty-three anti-CCP-positive non-RA CTD patients were retrospectively followed up for the development of RA. Bone erosions on the hands and feet were assessed by X-ray. Citrullination dependency was evaluated by an in-house ELISA, the HLA-DRB1 allele was typed, and the results obtained were then compared between RA-overlapping and non-RA anti-CCP-positive CTD patients. RESULTS Two out of 33 anti-CCP-positive CTD patients (6.1%) developed RA during a mean follow-up period of 8.9 years. X-rays were examined in 27 out of the 33 patients, and only one (3.7%) showed bone erosions. The frequency of the HLA-DRB1 shared epitope (SE) and anti-CCP antibody titers were both significantly higher in anti-CCP-positive RA-overlapping CTD patients than in anti-CCP-positive non-RA CTD patients, while no significant differences were observed in citrullination dependency. CONCLUSIONS Anti-CCP-positive non-RA CTD patients rarely developed RA. HLA-DRB1 SE and anti-CCP antibody titers may facilitate the differentiation of RA-overlapping CTD from anti-CCP-positive non-RA CTD.
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Affiliation(s)
- Takeshi Iwasaki
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Shuichiro Nakabo
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Chikashi Terao
- Laboratory for Statistical and Translational Genetics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Clinical Research Center, Shizuoka General Hospital, Shizuoka, Japan.,The Department of Applied Genetics, The School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Kosaku Murakami
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Ran Nakashima
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Motomu Hashimoto
- Department of Advanced Medicine for Rheumatic Diseases, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshitaka Imura
- Department of Clinical Immunology and Rheumatology, Tazuke Kofukai Medical Research Institute, Kitano Hospital, Osaka, Japan
| | | | - Hajime Yoshifuji
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan
| | - Yasuo Miura
- Department of Transfusion Medicine & Cell Therapy, Kyoto University Hospital, Kyoto, Japan
| | - Kimiko Yurugi
- Department of Transfusion Medicine & Cell Therapy, Kyoto University Hospital, Kyoto, Japan
| | - Taira Maekawa
- Department of Transfusion Medicine & Cell Therapy, Kyoto University Hospital, Kyoto, Japan
| | - Myrthe A M van Delft
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Leendert A Trouw
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Takao Fujii
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan.,Department of Clinical Immunology and Rheumatology, Wakayama Medical University, Wakayama, Japan
| | - Tsuneyo Mimori
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan.,Ijinkai Takeda General Hospital, Kyoto, Japan
| | - Koichiro Ohmura
- Department of Rheumatology and Clinical Immunology, Graduate School of Medicine, Kyoto University, 54 Shogoin-Kawahara-cho, Sakyo-ku, Kyoto, Japan.
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16
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Kawashiri SY, Tsuji Y, Tamai M, Nonaka F, Nobusue K, Yamanashi H, Maeda T, Kawakami A. Effects of cigarette smoking and human T-cell leukaemia virus type 1 infection on anti-citrullinated peptide antibody production in Japanese community-dwelling adults: the Nagasaki Islands Study. Scand J Rheumatol 2020; 50:295-298. [PMID: 32959708 DOI: 10.1080/03009742.2020.1810310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Objectives: We investigated whether the positivity of anti-citrullinated peptide antibody (ACPA) is associated with cigarette-smoking status and human T-cell leukaemia virus type 1 (HTLV-1) infection in a general population in Nagasaki, Japan, which is an ageing and HTLV-1-endemic area.Method: Baseline data from community-dwelling people in the Nagasaki Islands Study (NaIS) were included in this cross-sectional analysis. ACPA and HTLV-1 were measured in 3887 subjects without a history of treatment for rheumatoid arthritis. A logistic regression analysis was performed to assess the relationship between ACPA positivity and candidates of correlation with ACPA, i.e. the cigarette-smoking status quantified by Brinkman's index (BI) and HTLV-1 positivity.Results: Fifty-one subjects (1.3%) showed ACPA positivity, and 650 subjects (16.6%) were HTLV-1 carriers. In an age- and gender-adjusted logistic regression analysis, the BI [odds ratio (OR) 1.09, 95% confidence interval (CI)1.02-1.14, p = 0.0031] and a BI value > 500 (OR 3.92, 95% CI 1.72-9.22, p = 0.0014) were each significantly associated with ACPA positivity. HTLV-1 positivity did not show any association with ACPA positivity.Conclusion: A significant effect of cigarette-smoking status on ACPA production was revealed, whereas HTLV-1 positivity was not associated with ACPA production in this general population.
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Affiliation(s)
- S-Y Kawashiri
- Department of Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan.,Department of Immunology and Rheumatology, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - Y Tsuji
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - M Tamai
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - F Nonaka
- Department of Island and Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - K Nobusue
- Department of Island and Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - H Yamanashi
- Department of Island and Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan.,Department of General Medicine, Nagasaki University Hospital, Nagasaki, Japan
| | - T Maeda
- Department of Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan.,Department of Island and Community Medicine, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
| | - A Kawakami
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Medical Sciences, Nagasaki, Japan
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17
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Yamazaki H, Kuroiwa T, Shinmura K, Yukioka M, Murata N. Prevalence of anti-cyclic citrullinated peptide antibodies in patients with spondyloarthritis: A retrospective study. Mod Rheumatol 2020; 31:458-461. [PMID: 32340503 DOI: 10.1080/14397595.2020.1761070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Anti-cyclic citrullinated peptide (CCP) antibodies are frequently detected in the sera of patients with rheumatoid arthritis (RA). However, recent studies have revealed a potentially high prevalence rate of these antibodies in patients with other rheumatic disorders, causing confusion while diagnosing RA. Therefore, this study aimed to evaluate the positive rate of anti-CCP antibodies in other chronic arthritis diseases focusing on patients with spondyloarthritis (SpA). METHODS A total of 109 patients who were diagnosed with SpA at Yukioka Hospital from 1993 to 2018 were included in this retrospective analysis, including patients with ankylosing spondylitis (AS); psoriatic arthritis (PsA); synovitis, acne, pustulosis, hyperostosis, and osteitis syndrome (SAPHO); undifferentiated spondyloarthritis (uSpA); reactive arthritis (ReA); and inflammatory bowel disease-associated SpA (IBD). RESULTS Overall, 15.3% (16/109) of patients with SpA were positive for anti-CCP antibodies, including 2.3% (1/43) in AS, 23.1% (3/13) in SAPHO, 35.0% (7/20) in PsA, 14.8% (4/27) in uSpA, 0% (0/3) in ReA, and 33.3% (1/3) in IBD. CONCLUSION PsA patients have a significantly higher prevalence rate of positive anti-CCP antibodies among SpA patients, and the positive rates in SAPHO and uSpA were also high. These findings provide insight into the heterogeneity of SpA with relevance for RA differential diagnosis.
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Affiliation(s)
- Hiromitsu Yamazaki
- Division of General Medicine, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | | | - Ken Shinmura
- Division of General Medicine, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Masao Yukioka
- Department Rheumatology, Yukioka Hospital, Osaka, Japan
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18
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Wu EK, Ambrosini RD, Kottmann RM, Ritchlin CT, Schwarz EM, Rahimi H. Reinterpreting Evidence of Rheumatoid Arthritis-Associated Interstitial Lung Disease to Understand Etiology. Curr Rheumatol Rev 2020; 15:277-289. [PMID: 30652645 DOI: 10.2174/1573397115666190116102451] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 11/19/2018] [Accepted: 01/05/2019] [Indexed: 02/07/2023]
Abstract
Interstitial Lung Disease (ILD) is a well-known complication of rheumatoid arthritis (RA) which often results in significant morbidity and mortality. It is often diagnosed late in the disease process via descriptive criteria. Multiple subtypes of RA-ILD exist as defined by chest CT and histopathology. In the absence of formal natural history studies and definitive diagnostics, a conventional dogma has emerged that there are two major subtypes of RA-ILD (nonspecific interstitial pneumonia (NSIP) and Usual Interstitial Pneumonia (UIP)). These subtypes are based on clinical experience and correlation studies. However, recent animal model data are incongruous with established paradigms of RA-ILD and beg reassessment of the clinical evidence in order to better understand etiology, pathogenesis, prognosis, and response to therapy. To this end, here we: 1) review the literature on epidemiology, radiology, histopathology and clinical outcomes of the various RAILD subtypes, existing animal models, and current theories on RA-ILD pathogenesis; 2) highlight the major gaps in our knowledge; and 3) propose future research to test an emerging theory of RAILD that posits initial rheumatic lung inflammation in the form of NSIP-like pathology transforms mesenchymal cells to derive chimeric disease, and subsequently develops into frank UIP-like fibrosis in some RA patients. Elucidation of the pathogenesis of RA-ILD is critical for the development of effective interventions for RA-ILD.
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Affiliation(s)
- Emily K Wu
- Center for Musculoskeletal Research, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States.,Department of Microbiology & Immunology, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
| | - Robert D Ambrosini
- Department of Imaging Sciences, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
| | - R Matthew Kottmann
- Division of Pulmonary Diseases and Critical Care, Department of Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
| | - Christopher T Ritchlin
- Center for Musculoskeletal Research, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States.,Division of Allergy, Immunology, Rheumatology, Department of Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
| | - Edward M Schwarz
- Center for Musculoskeletal Research, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States.,Department of Microbiology & Immunology, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States.,Department of Orthopaedics, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
| | - Homaira Rahimi
- Center for Musculoskeletal Research, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States.,Department of Pediatrics, School of Medicine and Dentistry, University of Rochester, Rochester, NY, United States
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Finckh A, Courvoisier D, Lamacchia C. Measuring ACPA in the general population or primary care: is it useful? RMD Open 2020; 6:e001085. [PMID: 32079664 PMCID: PMC7046970 DOI: 10.1136/rmdopen-2019-001085] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 01/13/2023] Open
Abstract
Rheumatoid arthritis (RA) is associated with a significant disease burden and high costs for society. Because the disease has identifiable preclinical stages, screening and prevention have become a possibility in RA. Anticitrullinated peptide antibodies (ACPAs) are arguably the most likely candidate biomarker to screen for RA. This paper reviews the evidence for the use of ACPAs as a screening test in the broader general population, to identify individuals at high risk of subsequent onset of RA. We will review the diagnostic properties of the test and its positive and negative predictive value in different settings. We will discuss how ACPA testing could effectively be integrated in a broader screening strategy for RA.
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Affiliation(s)
- Axel Finckh
- Division of Rheumatology, University Hospital of Geneva, Geneva, Switzerland
| | | | - Celine Lamacchia
- Division of Rheumatology, University Hospital of Geneva, Geneva, Switzerland
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Abstract
Rheumatoid arthritis is a heterogeneous disease, which can be, based on data combining genetic risk factors and autoantibodies, sub-classified into ACPA-positive and -negative RA. Presence of ACPA and RF as well as rising CRP-levels in some patients years before onset of clinical symptoms indicate that relevant immune responses for RA development are initiated very early. ACPA are highly specific for RA, whereas RF can also be found among healthy (elderly) individuals and patients with other autoimmune diseases or infection. The most important genetic risk factor for RA development, the shared epitope alleles, resides in the MHC class II region. Shared epitope alleles, however, only predispose to the development of ACPA-positive RA. Smoking is thus far the most important environmental risk factor associated with the development of RA. Studies on synovitis have shown the importance not only of adaptive but also of innate immune responses. In summary of the various results from immunological changes in blood and synovial tissue, the extension of the immune response from a diffuse myeloid to a lympho-myeloid inflammation appears to be associated with a more successful therapeutic response to biologics. With respect to advances in synovitis research, new targets for treatment against pathological subsets of immune cells or fibroblasts are already on the horizon. However, alternative strategies involving the microbiome may play an important role as well and research in this field is growing rapidly.
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21
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Volkov M, van Schie KA, van der Woude D. Autoantibodies and B Cells: The ABC of rheumatoid arthritis pathophysiology. Immunol Rev 2019; 294:148-163. [PMID: 31845355 PMCID: PMC7065213 DOI: 10.1111/imr.12829] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 11/07/2019] [Indexed: 12/16/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease characterized by joint inflammation. In the last few decades, new insights into RA‐specific autoantibodies and B cells have greatly expanded our understanding of the disease. The best‐known autoantibodies in RA—rheumatoid factor (RF) and anti‐citrullinated protein antibodies (ACPA)—are present long before disease onset, and both responses show signs of maturation around the time of the first manifestation of arthritis. A very intriguing characteristic of ACPA is their remarkably high abundance of variable domain glycans. Since these glycans may convey an important selection advantage of citrulline‐reactive B cells, they may be the key to understanding the evolution of the autoimmune response. Recently discovered autoantibodies targeting other posttranslational modifications, such as anti‐carbamylated and anti‐acetylated protein antibodies, appear to be closely related to ACPA, which makes it possible to unite them under the term of anti‐modified protein antibodies (AMPA). Despite the many insights gained about these autoantibodies, it is unclear whether they are pathogenic or play a causal role in disease development. Autoreactive B cells from which the autoantibodies originate have also received attention as perhaps more likely disease culprits. The development of autoreactive B cells in RA largely depends on the interaction with T cells in which HLA “shared epitope” and HLA DERAA may play an important role. Recent technological advances made it possible to identify and characterize citrulline‐reactive B cells and acquire ACPA monoclonal antibodies, which are providing valuable insights and help to understand the nature of the autoimmune response underlying RA. In this review, we summarize what is currently known about the role of autoantibodies and autoreactive B cells in RA and we discuss the most prominent hypotheses aiming to explain the origins and the evolution of autoimmunity in RA.
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Affiliation(s)
- Mikhail Volkov
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Karin Anna van Schie
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Diane van der Woude
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
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22
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HLA risk alleles and gut microbiome in ankylosing spondylitis and rheumatoid arthritis. Best Pract Res Clin Rheumatol 2019; 33:101499. [DOI: 10.1016/j.berh.2020.101499] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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23
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Vergroesen RD, Slot LM, van Schaik BDC, Koning MT, Rispens T, van Kampen AHC, Toes REM, Scherer HU. N-Glycosylation Site Analysis of Citrullinated Antigen-Specific B-Cell Receptors Indicates Alternative Selection Pathways During Autoreactive B-Cell Development. Front Immunol 2019; 10:2092. [PMID: 31572358 PMCID: PMC6749139 DOI: 10.3389/fimmu.2019.02092] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 08/19/2019] [Indexed: 12/12/2022] Open
Abstract
Many autoimmune diseases are hallmarked by autoreactive B and plasma cell responses that are directly or indirectly involved in disease pathogenesis. These B-cell responses show large variability between diseases, both in terms of the secreted autoantibody repertoire and the dynamics and characteristics of the underlying B-cell responses. Hence, different mechanisms have been proposed to explain the emergence of autoreactive B cells in an otherwise self-tolerant immune system. Notably, most mechanistic insights have been obtained from murine studies using models harboring genetic modifications of B and T cells. Given recent technological advances that have rendered autoreactive human B cells accessible for analysis, we here discuss the phenomenon of extensive N-glycosylation of the B-cell receptor (BCR) variable domain of a prototypic human autoreactive B-cell response and its potential role in the generation of autoimmunity. Anti-citrullinated protein antibodies (ACPA) hallmark the most disease-specific autoimmune response in Rheumatoid Arthritis (RA). Remarkably, ACPA-IgG are heavily N-glycosylated in the variable domain due to somatic mutations that generate abundant N-glycosylation consensus sequences. These sites, obtained from full-length BCR sequences of ACPA-expressing B cells from 12 ACPA-positive RA patients, were here analyzed in detail. Sites that required a single nucleotide mutation to be generated were defined as single somatic hypermutation (s-SHM) sites, whereas sites requiring multiple mutations were defined as m-SHM sites. IgG sequences of 12 healthy donors were used as control. Computational modeling of the germinal center reaction (CLONE algorithm) was used with the germline counterparts of ACPA-IgG heavy chain (HC) sequences to simulate the germinal center response. Our analyses revealed an abundance of N-glycosylation sites in ACPA-IgG HC that frequently required multiple mutations and predominated in specific positions. Based on these data, and taking into account recent insights into the dynamics of the ACPA-response during disease development, we here discuss the hypothesis that N-glycosylation sites in ACPA-IgG variable domains could lead to alternative, possibly antibody affinity-independent selection forces. Presumably, this occurs during germinal center responses allowing these B cells to escape from putative tolerance checkpoints, thereby driving autoreactive B cell development in the pathogenesis of RA.
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Affiliation(s)
| | - Linda M Slot
- Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands
| | - Barbera D C van Schaik
- Bioinformatics Laboratory, Amsterdam Public Health Research Institute, Amsterdam Infection & Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Marvyn T Koning
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, Netherlands
| | - Antoine H C van Kampen
- Bioinformatics Laboratory, Amsterdam Public Health Research Institute, Amsterdam Infection & Immunity Institute, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.,Biosystems Data Analysis, Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, Netherlands
| | - René E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands
| | - Hans U Scherer
- Department of Rheumatology, Leiden University Medical Center, Leiden, Netherlands
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Kissel T, van Schie KA, Hafkenscheid L, Lundquist A, Kokkonen H, Wuhrer M, Huizinga TW, Scherer HU, Toes R, Rantapää-Dahlqvist S. On the presence of HLA-SE alleles and ACPA-IgG variable domain glycosylation in the phase preceding the development of rheumatoid arthritis. Ann Rheum Dis 2019; 78:1616-1620. [PMID: 31471298 DOI: 10.1136/annrheumdis-2019-215698] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/16/2019] [Accepted: 08/17/2019] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Anti-citrullinated protein antibodies (ACPA) in rheumatoid arthritis (RA) patients display a unique feature defined by the abundant presence of N-linked glycans within the variable domains (V-domains). Recently, we showed that N-glycosylation sites, which are required for the incorporation of V-domain glycans, are introduced following somatic hypermutation. However, it is currently unclear when V-domain glycosylation occurs. Further, it is unknown which factors might trigger the generation of V-domain glycans and whether such glycans are relevant for the transition towards RA. Here, we determined the presence of ACPA-IgG V-domain glycans in paired samples of pre-symptomatic individuals and RA patients. METHODS ACPA-IgG V-domain glycosylation was analysed using ultra-high performance liquid chromatography (UHPLC) in paired samples of pre-symptomatic individuals (median interquartile range (IQR) pre-dating time: 5.8 (5.9) years; n=201; 139 ACPA-positive and 62 ACPA-negative) and RA patients (n=99; 94 ACPA-positive and 5 ACPA-negative). RESULTS V-domain glycans on ACPA-IgG were already present up to 15 years before disease in pre-symptomatic individuals and their abundance increased closer to symptom onset. Noteworthy, human leucocyte antigen class II shared epitope (HLA-SE) alleles associated with the presence of V-domain glycans on ACPA-IgG. CONCLUSION Our observations indicate that somatic hypermutation of ACPA, which results in the incorporation of N-linked glycosylation sites and consequently V-domain glycans, occurs already years before symptom onset in individuals that will develop RA later in life. Moreover, our findings provide first evidence that HLA-SE alleles associate with ACPA-IgG V-domain glycosylation in the pre-disease phase and thereby further refine the connection between HLA-SE and the development of ACPA-positive RA.
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Affiliation(s)
- Theresa Kissel
- Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Lise Hafkenscheid
- Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Heidi Kokkonen
- Department of Public Health and Clinical Medicine/Rheumatology, Umeå University, Umeå, Sweden
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Tom Wj Huizinga
- Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - René Toes
- Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
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25
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Katsumata M, Hozumi H, Yasui H, Suzuki Y, Kono M, Karayama M, Furuhashi K, Enomoto N, Fujisawa T, Inui N, Nakamura Y, Suda T. Frequency and clinical relevance of anti-cyclic citrullinated peptide antibody in idiopathic interstitial pneumonias. Respir Med 2019; 154:102-108. [PMID: 31229943 DOI: 10.1016/j.rmed.2019.06.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/07/2019] [Accepted: 06/17/2019] [Indexed: 10/26/2022]
Abstract
RATIONALE Although anti-cyclic citrullinated peptide antibody (ACPA) is highly specific for rheumatoid arthritis (RA), some patients with idiopathic interstitial pneumonia (IIP) are ACPA-positive, but do not fulfill the diagnostic criteria for RA. The clinical significance of ACPA in such patients is as yet unclear. OBJECTIVE We aimed to investigate the frequency of ACPA positivity and its clinical significance in patients initially diagnosed with IIP. METHODS We retrospectively analyzed 370 consecutive patients who were diagnosed with IIP and for whom serum ACPA results were available. The incidence of ACPA positivity and its predictive role for subsequent onset of RA was examined. Risk factors for development of RA were evaluated by Cox hazards analysis. RESULTS Of 370 patients, 24 (6.5%) were ACPA-positive, including 7 of 144 patients (4.9%) initially diagnosed with idiopathic pulmonary fibrosis (IPF) and 17 of 226 patients (7.5%) with non-IPF. The cumulative 3-year incidence of overt RA was significantly higher in patients who were positive rather than negative for ACPA (28.9% vs. 1.1%, P < 0.01). On multivariate analysis, younger age was independently associated with development of RA in patients who were ACPA-positive (per one year increase: hazard ratio = 0.93, 95% confidence interval 0.87-0.99, P = 0.03). CONCLUSION Among patients initially diagnosed with IIP, a small proportion was positive for ACPA, of whom approximately one-third subsequently developed RA within 3 years from IIP diagnosis. Clinicians should be alert to the possibility of RA developing in patients with IIP who are ACPA-positive, particularly those patients who are younger.
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Affiliation(s)
- Mineo Katsumata
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Hironao Hozumi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.
| | - Hideki Yasui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Yuzo Suzuki
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Masato Kono
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan; Department of Respiratory Medicine, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - Masato Karayama
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Kazuki Furuhashi
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Noriyuki Enomoto
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Tomoyuki Fujisawa
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Naoki Inui
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan; Department of Clinical Pharmacology and Therapeutics, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Yutaro Nakamura
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Takafumi Suda
- Second Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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Kampstra ASB, Dekkers JS, Volkov M, Dorjée AL, Hafkenscheid L, Kempers AC, van Delft M, Kissel T, Reijm S, Janssen GMC, van Veelen PA, Bang H, Huizinga TWJ, Trouw LA, van der Woude D, Toes REM. Different classes of anti-modified protein antibodies are induced on exposure to antigens expressing only one type of modification. Ann Rheum Dis 2019; 78:908-916. [PMID: 31151934 DOI: 10.1136/annrheumdis-2018-214950] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 03/05/2019] [Accepted: 03/30/2019] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Autoantibodies against post-translationally modified proteins (anti-modified protein antibodies or AMPAs) are a hallmark of rheumatoid arthritis (RA). A variety of classes of AMPAs against different modifications on proteins, such as citrullination, carbamylation and acetylation, have now been described in RA. At present, there is no conceptual framework explaining the concurrent presence or mutual relationship of different AMPA responses in RA. Here, we aimed to gain understanding of the co-occurrence of AMPA by postulating that the AMPA response shares a common 'background' that can evolve into different classes of AMPAs. METHODS Mice were immunised with modified antigens and analysed for AMPA responses. In addition, reactivity of AMPA purified from patients with RA towards differently modified antigens was determined. RESULTS Immunisation with carbamylated proteins induced AMPAs recognising carbamylated proteins and also acetylated proteins. Similarly, acetylated proteins generated (autoreactive) AMPAs against other modifications as well. Analysis of anti-citrullinated protein antibodies from patients with RA revealed that these also display reactivity to acetylated and carbamylated antigens. Similarly, anti-carbamylated protein antibodies showed cross-reactivity against all three post-translational modifications. CONCLUSIONS Different AMPA responses can emerge from exposure to only a single type of modified protein. These findings indicate that different AMPA responses can originate from a common B-cell response that diversifies into multiple distinct AMPA responses and explain the presence of multiple AMPAs in RA, one of the hallmarks of the disease.
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Affiliation(s)
| | | | - Mikhail Volkov
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Annemarie L Dorjée
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Lise Hafkenscheid
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Ayla C Kempers
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Myrthe van Delft
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Theresa Kissel
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Sanne Reijm
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - George M C Janssen
- Center of Proteomics and Metabolomics, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Peter A van Veelen
- Center of Proteomics and Metabolomics, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Holger Bang
- Research and development, Orgentec Diagnostika, Mainz, Germany
| | - Tom W J Huizinga
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Leendert A Trouw
- Department of Immunohematology and Bloodtransfusion, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - Diane van der Woude
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
| | - René E M Toes
- Department of Rheumatology, Leids Universitair Medisch Centrum, Leiden, The Netherlands
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Nakabo S. Clinical and etiological meaning of anti-carbamylated protein antibodies in rheumatoid arthritis. Immunol Med 2019; 41:147-153. [PMID: 30714481 DOI: 10.1080/25785826.2018.1556017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
Several autoantibodies against proteins with post-translational modifications have been detected in patients with rheumatoid arthritis (RA) and are called anti-modified protein antibodies (AMPAs). Anti-carbamylated protein antibodies (Anti-CarP Ab) are the second most vigorously researched AMPAs following anti-citrullinated protein/peptide antibodies (ACPA). Anti-CarP Ab and ACPA show cross-reactivity to some extent and frequently co-exist with each other in RA, but are two distinct antibodies. Although the diagnostic efficacy of anti-CarP Ab is inferior to that of ACPA, the diagnostic specificity of RA may improve when used in combination with ACPA and rheumatoid factor. Anti-CarP Ab and ACPA are also useful for identifying patients at high risk of more severe joint destruction and cardiovascular diseases. The high prevalence of the co-existence of both antibodies suggests a common factor in their production, and this is important for the development of RA because both antibodies emerge before the onset of clinical symptoms. Neutrophils may also be crucially involved. It is important to distinguish citrullinated antigens from carbamylated antigens because the methods commonly used to detect the former are now known to be cross-reactive with the latter. Research on anti-CarP Ab will provide novel insights into the pathology and etiology of RA.
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Affiliation(s)
- Shuichiro Nakabo
- a Systemic Autoimmunity Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases , National Institutes of Health , Bethesda , MD , USA
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28
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Rheumatoid Arthritis: Atherosclerosis Imaging and Cardiovascular Risk Assessment Using Machine and Deep Learning-Based Tissue Characterization. Curr Atheroscler Rep 2019; 21:7. [PMID: 30684090 DOI: 10.1007/s11883-019-0766-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF THE REVIEW Rheumatoid arthritis (RA) is a chronic, autoimmune disease which may result in a higher risk of cardiovascular (CV) events and stroke. Tissue characterization and risk stratification of patients with rheumatoid arthritis are a challenging problem. Risk stratification of RA patients using traditional risk factor-based calculators either underestimates or overestimates the CV risk. Advancements in medical imaging have facilitated early and accurate CV risk stratification compared to conventional cardiovascular risk calculators. RECENT FINDING In recent years, a link between carotid atherosclerosis and rheumatoid arthritis has been widely discussed by multiple studies. Imaging the carotid artery using 2-D ultrasound is a noninvasive, economic, and efficient imaging approach that provides an atherosclerotic plaque tissue-specific image. Such images can help to morphologically characterize the plaque type and accurately measure vital phenotypes such as media wall thickness and wall variability. Intelligence-based paradigms such as machine learning- and deep learning-based techniques not only automate the risk characterization process but also provide an accurate CV risk stratification for better management of RA patients. This review provides a brief understanding of the pathogenesis of RA and its association with carotid atherosclerosis imaged using the B-mode ultrasound technique. Lacunas in traditional risk scores and the role of machine learning-based tissue characterization algorithms are discussed and could facilitate cardiovascular risk assessment in RA patients. The key takeaway points from this review are the following: (i) inflammation is a common link between RA and atherosclerotic plaque buildup, (ii) carotid ultrasound is a better choice to characterize the atherosclerotic plaque tissues in RA patients, and (iii) intelligence-based paradigms are useful for accurate tissue characterization and risk stratification of RA patients.
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29
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Verheul MK, Böhringer S, van Delft MAM, Jones JD, Rigby WFC, Gan RW, Holers VM, Edison JD, Deane KD, Janssen KMJ, Westra J, Brink M, Rantapää-Dahlqvist S, Huizinga TWJ, van der Helm-van Mil AHM, van der Woude D, Toes REM, Trouw LA. Triple Positivity for Anti-Citrullinated Protein Autoantibodies, Rheumatoid Factor, and Anti-Carbamylated Protein Antibodies Conferring High Specificity for Rheumatoid Arthritis: Implications for Very Early Identification of At-Risk Individuals. Arthritis Rheumatol 2018; 70:1721-1731. [PMID: 29781231 DOI: 10.1002/art.40562] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 05/15/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVE In rheumatoid arthritis (RA), anti-citrullinated protein antibodies (ACPAs) and rheumatoid factor (RF) are commonly used to aid in the diagnosis. Although these autoantibodies are mainly found in RA, their specificity is not optimal. It is therefore difficult to identify RA patients, especially in very early disease, based on the presence of ACPAs and RF alone. In addition, anti-carbamylated protein (anti-CarP) antibodies have diagnostic and prognostic value, since their presence is associated with joint damage in RA patients and also associated with the future development of RA in patients with arthralgia. Therefore, the aim of the present study was to investigate the value of combined antibody testing in relation to prediction and diagnosis of (early) RA. METHODS A literature search resulted in identification of 12 relevant studies, consisting of RA patients, pre-RA individuals, disease controls, healthy first-degree relatives of RA patients, and healthy control subjects, in which data on RF, ACPAs, and anti-CarP antibody status were available. Using these data, random effects meta-analyses were carried out for several antibody combinations. RESULTS The individual antibodies were highly prevalent in patients with RA (34-80%) compared to the control groups, but were also present in non-RA controls (0-23%). For the classification of most subjects correctly as having RA or as a non-RA control, the combination of ACPAs and/or RF often performed well (specificity 65-100%, sensitivity 59-88%). However, triple positivity for ACPAs, RF, and anti-CarP antibodies resulted in a higher specificity for RA (98-100%), accompanied by a lower sensitivity (11-39%). CONCLUSION As the rheumatology field is moving toward very early identification of RA and possible screening for individuals at maximum risk of RA in populations with a low pretest probability, an autoantibody profile of triple positivity for ACPAs, RF, and anti-CarP provides interesting information that might help identify individuals at risk of developing RA.
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Affiliation(s)
| | | | | | | | | | - Ryan W Gan
- Colorado School of Public Health, Aurora
| | | | - Jess D Edison
- Walter Reed National Military Medical Center, Bethesda, Maryland
| | | | - Koen M J Janssen
- University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Johanna Westra
- University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | | | | | - Rene E M Toes
- Leiden University Medical Center, Leiden, The Netherlands
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30
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Holers VM, Demoruelle MK, Kuhn KA, Buckner JH, Robinson WH, Okamoto Y, Norris JM, Deane KD. Rheumatoid arthritis and the mucosal origins hypothesis: protection turns to destruction. Nat Rev Rheumatol 2018; 14:542-557. [PMID: 30111803 PMCID: PMC6704378 DOI: 10.1038/s41584-018-0070-0] [Citation(s) in RCA: 220] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Individuals at high risk of developing seropositive rheumatoid arthritis (RA) can be identified for translational research and disease prevention studies through the presence of highly informative and predictive patterns of RA-related autoantibodies, especially anti-citrullinated protein antibodies (ACPAs), in the serum. In serologically positive individuals without arthritis, designated ACPA positive at risk, the presence of mucosal inflammatory processes associated with the presence of local ACPA production has been demonstrated. In other at-risk populations, local RA-related autoantibody production is present even in the absence of serum autoantibodies. Additionally, a proportion of at-risk individuals exhibit local mucosal ACPA production in the lung, as well as radiographic small-airway disease, sputum hypercellularity and increased neutrophil extracellular trap formation. Other mucosal sites in at-risk individuals also exhibit autoantibody production, inflammation and/or evidence of dysbiosis. As the proportion of individuals who exhibit such localized inflammation-associated ACPA production is substantially higher than the likelihood of an individual developing future RA, this finding raises the hypothesis that mucosal ACPAs have biologically relevant protective roles. Identifying the mechanisms that drive both the generation and loss of externally focused mucosal ACPA production and promote systemic autoantibody expression and ultimately arthritis development should provide insights into new therapeutic approaches to prevent RA.
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Affiliation(s)
- V Michael Holers
- Division of Rheumatology, University of Colorado-Denver, Aurora, CO, USA.
| | | | - Kristine A Kuhn
- Division of Rheumatology, University of Colorado-Denver, Aurora, CO, USA
| | | | - William H Robinson
- Division of Immunology and Rheumatology, Stanford University, Stanford, CA, USA
| | - Yuko Okamoto
- Division of Rheumatology, University of Colorado-Denver, Aurora, CO, USA
| | - Jill M Norris
- Department of Epidemiology, Colorado School of Public Health, Aurora, CO, USA
| | - Kevin D Deane
- Division of Rheumatology, University of Colorado-Denver, Aurora, CO, USA
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Kodama R, Muraki S, Iidaka T, Oka H, Teraguchi M, Kagotani R, Asai Y, Hashizume H, Yoshida M, Kawaguchi H, Nakamura K, Akune T, Tanaka S, Yoshimura N. Serum levels of matrix metalloproteinase-3 and autoantibodies related to rheumatoid arthritis in the general Japanese population and their association with osteoporosis and osteoarthritis: the ROAD study. J Bone Miner Metab 2018; 36:246-253. [PMID: 28365812 DOI: 10.1007/s00774-017-0834-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/12/2017] [Indexed: 10/19/2022]
Abstract
To purpose of this study was to reveal the mean levels and positive proportion of serological markers related to rheumatoid arthritis, and clarify their relationship with osteoporosis and hand osteoarthritis (OA). A total of 1546 participants from the third survey of the research on osteoarthritis/osteoporosis against disability study were enrolled in the current study. Using participant blood samples, the levels of anti-cyclic citrullinated protein (CCP) antibody, rheumatoid factor (RF), matrix metalloproteinase-3 (MMP-3), C-reactive protein (CRP), and high-sensitivity CRP (hsCRP) were measured. Subjects with higher than normal levels were defined as being positive. Osteoporosis was defined according to the recommendations set by World Health Organization criteria in 1994. Radiographic hand OA was evaluated using the modified Kellgren-Lawrence (KL) scale. The positive proportion of anti-CCP antibody, RF, MMP-3, CRP, and hsCRP was 1.8, 7.1, 15.0, 6.7, and 6.4%, respectively. MMP-3 was associated with age, and was significantly higher in men than in women. Positive MMP-3 was not significantly related to osteoporosis or severe hand OA (KL grade ≥3) after adjustment for other factors including age, sex, and body mass index. The results from this study clarified the values and positive proportion of RA-related markers and revealed their relationship with osteoporosis and hand OA.
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Affiliation(s)
- Rie Kodama
- Department of Orthopedic Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shigeyuki Muraki
- Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, Graduate School of Medicine, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Toshiko Iidaka
- Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, Graduate School of Medicine, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroyuki Oka
- Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical and Research Center, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masatoshi Teraguchi
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Ryohei Kagotani
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Yoshiki Asai
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroshi Hashizume
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Munehito Yoshida
- Department of Orthopedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroshi Kawaguchi
- Department of Orthopedic Surgery, Japan Community Healthcare Organization Tokyo Shinjuku Medical Center, Tokyo, Japan
| | - Kozo Nakamura
- National Rehabilitation Center for Persons with Disabilities, Saitama, Japan
| | - Toru Akune
- National Rehabilitation Center for Persons with Disabilities, Saitama, Japan
| | - Sakae Tanaka
- Department of Orthopedic Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Noriko Yoshimura
- Department of Joint Disease Research, 22nd Century Medical and Research Center, Faculty of Medicine, Graduate School of Medicine, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan.
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Scherer HU, Huizinga TWJ, Krönke G, Schett G, Toes REM. The B cell response to citrullinated antigens in the development of rheumatoid arthritis. Nat Rev Rheumatol 2018; 14:157-169. [DOI: 10.1038/nrrheum.2018.10] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ten Brinck RM, van Steenbergen HW, van Delft MAM, Verheul MK, Toes REM, Trouw LA, van der Helm-van Mil AHM. The risk of individual autoantibodies, autoantibody combinations and levels for arthritis development in clinically suspect arthralgia. Rheumatology (Oxford) 2017; 56:2145-2153. [PMID: 28968865 DOI: 10.1093/rheumatology/kex340] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Indexed: 12/15/2022] Open
Abstract
Objectives Autoantibody testing is helpful for predicting the risk of progression to clinical arthritis in subjects at risk. Previous longitudinal studies have mainly selected autoantibody-positive arthralgia patients, and consequently the predictive values of autoantibodies were evaluated relative to one another. This study assessed the risks for arthritis development of ACPA, RF and/or anti-carbamylated protein antibodies (anti-CarP) in arthralgia patients considered at risk for RA by rheumatologists, based on clinical characteristics (clinically suspect arthralgia, CSA). Methods The baseline ACPA, RF and anti-CarP autoantibody status of 241 patients, consecutively included in the CSA cohort, was studied for risk of developing clinical arthritis during a median follow-up of 103 (interquartile range: 81-114) weeks. Results Univariable associations for arthritis development were observed for ACPA, RF and anti-CarP antibodies; hazard ratios (HRs) (95% CI) were 8.5 (4.7-15.5), 5.1 (2.8-9.3) and 3.9 (1.9-7.7), respectively. In multivariable analysis, only ACPA was independently associated (HR = 5.1; 2.0-13.2). Relative to autoantibody-negative CSA patients, ACPA-negative/RF-positive patients had HRs of 2.6 (1.04-6.6), ACPA-positive/RF-negative patients 8.0 (2.4-27.4) and ACPA-positive/RF-positive patients 10.5 (5.4-20.6). Positive predictive values for development of clinical arthritis within 2 years were: 38% for ACPA-negative/RF-positive, 50% for ACPA-positive/RF-negative and 67% for ACPA-positive/RF-positive patients. Higher ACPA levels were not significantly associated with increased progression to clinical arthritis, in contrast to higher RF levels. Autoantibody levels were stable during follow-up. Conclusion ACPA conferred the highest risk for arthritis development and had an additive value to RF. However, >30% of ACPA-positive/RF-positive CSA patients did not develop arthritis during the 2-year follow-up. Thus, CSA and information on autoantibodies is insufficient for accurately identifying imminent autoantibody-positive RA.
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Affiliation(s)
- Robin M Ten Brinck
- Department of Rheumatology, Leiden University Medical Centre, Leiden, the Netherlands
| | | | - Myrthe A M van Delft
- Department of Rheumatology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Marije K Verheul
- Department of Rheumatology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Rene E M Toes
- Department of Rheumatology, Leiden University Medical Centre, Leiden, the Netherlands
| | - Leendert A Trouw
- Department of Rheumatology, Leiden University Medical Centre, Leiden, the Netherlands
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Kempers AC, Hafkenscheid L, Scherer HU, Toes REM. Variable domain glycosylation of ACPA-IgG: A missing link in the maturation of the ACPA response? Clin Immunol 2017; 186:34-37. [PMID: 28882619 DOI: 10.1016/j.clim.2017.09.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 09/03/2017] [Indexed: 12/14/2022]
Abstract
Anti-citrullinated Protein Antibodies (ACPA) are excellent markers for Rheumatoid arthritis (RA) and are postulated to have a pathogenic role in the disease process. A multistep model for the evolution of the ACPA response in RA was proposed in which an initial break of tolerance causes, as "first hit", "silent" production of ACPA without any clinical symptoms. The model further proposes that the ACPA immune response matures upon a certain (unknown) trigger, a "second hit", which leads to epitope spreading, an increase in ACPA titres and extended isotype usage before clinical RA manifestations. These occurrences are indicative of an expansion of the citrulline-specific B cell response, though ACPA remain of low avidity even in established disease. This persistence of low avidity is puzzling, as the typical signs of maturation of the immune response seem to be uncoupled from the classical process of affinity maturation. In fact, it suggests that B cells expressing ACPA could bypass selection mechanisms that otherwise control the expansion of auto-reactive B cells. In the established, chronic phase, we recently found that ACPA-IgG are extensively glycosylated in the variable (Fab) domain. More than 90% of ACPA-IgG molecules carry Fab glycans that are highly sialylated. This molecular feature is striking and may provide a missing link in our understanding of the maturation of the ACPA immune response. This review, therefore, describes the current knowledge about ACPA Fab glycosylation in the pathogenesis of RA.
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Affiliation(s)
- Ayla C Kempers
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, Leiden 2300 RC, The Netherlands.
| | - Lise Hafkenscheid
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, Leiden 2300 RC, The Netherlands.
| | - Hans Ulrich Scherer
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, Leiden 2300 RC, The Netherlands.
| | - René E M Toes
- Department of Rheumatology, Leiden University Medical Center, P.O. Box 9600, Leiden 2300 RC, The Netherlands.
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Orellana C, Saevarsdottir S, Klareskog L, Karlson EW, Alfredsson L, Bengtsson C. Oral contraceptives, breastfeeding and the risk of developing rheumatoid arthritis: results from the Swedish EIRA study. Ann Rheum Dis 2017; 76:1845-1852. [PMID: 28818831 PMCID: PMC5705848 DOI: 10.1136/annrheumdis-2017-211620] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/15/2017] [Accepted: 06/24/2017] [Indexed: 01/16/2023]
Abstract
OBJECTIVES To study whether oral contraceptive (OC) use or breastfeeding (BF) influence the risk of rheumatoid arthritis (RA), stratifying the cases by presence/absence of anticitrullinated protein antibodies (ACPA), and whether these factors interact with known risk factors in the development of ACPA-positive RA. METHODS Women aged ≥18 years, participants in the population-based case-control Swedish Epidemiological Investigation of RA study (2641 cases/4251 controls), completed an extensive questionnaire regarding OC, BF and potential confounders. We calculated ORs, with 95% CIs, adjusted for age, residential area, smoking and alcohol consumption. Attributable proportion due to interaction (AP) was estimated to evaluate presence of interaction. RESULTS Compared with never users, ever and past OC users had a decreased risk of ACPA-positive RA (OR=0.84 (95% CI 0.74 to 0.96); OR=0.83 (95% CI 0.73 to 0.95), respectively). No significant associations were found for ACPA-negative RA. Long duration of OC use (>7 years vs never use) decreased the risk of both ACPA-positive (p=0.0037) and ACPA-negative RA (p=0.0356).A history of long BF decreased the risk only of ACPA-positive RA in a dose-dependent manner (p=0.0086), but this trend did not remain after adjustments. A significant interaction was observed between the lack of OC use and smoking (AP=0.28 (95% CI 0.14-0.42)) on the risk of ACPA-positive RA. No interactions were found for BF. CONCLUSIONS OC decreased the risk of RA, especially ACPA-positive RA, where an interaction with smoking was observed. A long duration of OC use decreased the risk of both disease subsets. We could not confirm an association between BF and a decreased risk of either ACPA-positive or ACPA-negative RA.
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Affiliation(s)
- Cecilia Orellana
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Saedis Saevarsdottir
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Rheumatology Unit, Department of Medicine, Solna, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine, Solna, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - Elizabeth W Karlson
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Lars Alfredsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden
| | - Camilla Bengtsson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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36
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Kempers AC, Hafkenscheid L, Dorjée AL, Moutousidou E, van de Bovenkamp FS, Rispens T, Trouw LA, van Oosterhout M, Huizinga TW, Toes R, Scherer HU. The extensive glycosylation of the ACPA variable domain observed for ACPA-IgG is absent from ACPA-IgM. Ann Rheum Dis 2017; 77:1087-1088. [PMID: 28747327 DOI: 10.1136/annrheumdis-2017-211533] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/10/2017] [Accepted: 07/01/2017] [Indexed: 01/07/2023]
Affiliation(s)
- Ayla C Kempers
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Lise Hafkenscheid
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Annemarie L Dorjée
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Eleni Moutousidou
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Fleur S van de Bovenkamp
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, The Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, The Netherlands
| | - Leendert A Trouw
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Tom Wj Huizinga
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - René Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Hans Ulrich Scherer
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
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37
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Julià A, Blanco F, Fernández-Gutierrez B, González A, Cañete JD, Maymó J, Alperi-López M, Olivè A, Corominas H, Martínez-Taboada V, González-Álvaro I, Fernandez-Nebro A, Erra A, Sánchez-Fernández S, Alonso A, López-Lasanta M, Tortosa R, Codó L, Lluis Gelpi J, García-Montero AC, Bertranpetit J, Absher D, Myers RM, Tornero J, Marsal S. Identification of IRX1 as a Risk Locus for Rheumatoid Factor Positivity in Rheumatoid Arthritis in a Genome-Wide Association Study. Arthritis Rheumatol 2017; 68:1384-91. [PMID: 26815016 DOI: 10.1002/art.39591] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 01/07/2016] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Rheumatoid factor (RF) is a well-established diagnostic and prognostic biomarker in rheumatoid arthritis (RA). However, ∼20% of RA patients are negative for this anti-IgG antibody. To date, only variation at the HLA-DRB1 gene has been associated with the presence of RF. This study was undertaken to identify additional genetic variants associated with RF positivity. METHODS A genome-wide association study (GWAS) for RF positivity was performed using an Illumina Quad610 genotyping platform. A total of 937 RF-positive and 323 RF-negative RA patients were genotyped for >550,000 single-nucleotide polymorphisms (SNPs). Association testing was performed using an allelic chi-square test implemented in Plink software. An independent cohort of 472 RF-positive and 190 RF-negative RA patients was used to validate the most significant findings. RESULTS In the discovery stage, a SNP in the IRX1 locus on chromosome 5p15.3 (SNP rs1502644) showed a genome-wide significant association with RF positivity (P = 4.13 × 10(-8) , odds ratio [OR] 0.37 [95% confidence interval (95% CI) 0.26-0.53]). In the validation stage, the association of IRX1 with RF was replicated in an independent group of RA patients (P = 0.034, OR 0.58 [95% CI 0.35-0.97] and combined P = 1.14 × 10(-8) , OR 0.43 [95% CI 0.32-0.58]). CONCLUSION To our knowledge, this is the first GWAS of RF positivity in RA. Variation at the IRX1 locus on chromosome 5p15.3 is associated with the presence of RF. Our findings indicate that IRX1 and HLA-DRB1 are the strongest genetic factors for RF production in RA.
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Affiliation(s)
- Antonio Julià
- Vall d'Hebron Hospital Research Institute, Barcelona, Spain
| | - Francisco Blanco
- Instituto de Investigación Biomédica de A Coruña-Hospital Universitario A Coruña, A Coruña, Spain
| | | | - Antonio González
- Instituto de Investigación Sanitaria and Hospital Clinico Universitario de Santiago, Santiago de Compostela, Spain
| | | | - Joan Maymó
- Hospital del Mar, Barcelona, Barcelona, Spain
| | | | - Alex Olivè
- Hospital Universitari Germans Trias i Pujol, Barcelona, Spain
| | | | | | | | - Antonio Fernandez-Nebro
- Instituto de Investigación Biomédica de Málaga, Hospital Regional Universitario de Málaga, and Universidad de Málaga, Málaga, Spain
| | - Alba Erra
- Hospital Sant Rafael, Barcelona, Spain
| | | | - Arnald Alonso
- Vall d'Hebron Hospital Research Institute, Barcelona, Spain
| | | | - Raül Tortosa
- Vall d'Hebron Hospital Research Institute, Barcelona, Spain
| | - Laia Codó
- Barcelona Supercomputing Center, Barcelona, Spain
| | | | | | - Jaume Bertranpetit
- National Genotyping Center and Pompeu Fabra University, Barcelona, Spain
| | - Devin Absher
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama
| | - Richard M Myers
- HudsonAlpha Institute for Biotechnology, Huntsville, Alabama
| | - Jesús Tornero
- Hospital Universitario de Guadalajara, Guadalajara, Spain
| | - Sara Marsal
- Vall d'Hebron Hospital Research Institute, Barcelona, Spain
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38
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Tedeschi SK, Cui J, Arkema EV, Robinson WH, Sokolove J, Lingampalli N, Sparks JA, Karlson EW, Costenbader KH. Elevated BMI and antibodies to citrullinated proteins interact to increase rheumatoid arthritis risk and shorten time to diagnosis: A nested case-control study of women in the Nurses' Health Studies. Semin Arthritis Rheum 2017; 46:692-698. [PMID: 27939764 PMCID: PMC5348285 DOI: 10.1016/j.semarthrit.2016.09.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 09/02/2016] [Accepted: 09/08/2016] [Indexed: 01/17/2023]
Abstract
OBJECTIVE Overweight/obesity and anti-citrullinated protein antibodies (ACPA) increase rheumatoid arthritis (RA) risk. We investigated the relationship between body mass index (BMI) and ACPA, tested for an interaction between BMI and ACPA for RA risk, and examined effects of BMI and ACPA on time to RA diagnosis. DESIGN Within the Nurses' Health Studies, blood samples were collected before diagnosis from medical record-confirmed incident RA cases and matched controls. Multiplex assays measured 7 ACPA subtypes (biglycan, clusterin, enolase, fibrinogen, histone 2A, histone 2B, and vimentin). Logistic regression analyses tested the association of BMI and ACPA and for a multiplicative interaction between BMI groups (≥25 vs. <25kg/m2) and ACPA positivity (≥2 vs. <2 subtypes), adjusting for age, smoking, alcohol use, and HLA-shared epitope. In case-only analyses, log-rank tests compared time from blood draw to RA onset by cross-classified BMI/ACPA status. RESULTS Among 255 pre-RA cases and 778 matched controls, 15.7% vs. 2.1% (p<0.001) had ≥2 ACPA and 49.4% vs. 40.2% (p<0.01) were overweight/obese. Continuous BMI was not associated with presence of ≥2 ACPA [OR per kg/m2 unit BMI: 1.03 (95% CI: 0.97-1.09)]. However, there was a multiplicative interaction between elevated BMI and the presence of ≥2 ACPA for RA risk (p = 0.027). Women with BMI≥25kg/m2 and ≥2 ACPA had OR 22.7 (95% CI: 6.64-77.72) for RA. Median time to RA differed by BMI/ACPA group (overall log-rank p<0.001) and was shortest among women with ≥2 ACPA and BMI≥25kg/m2 [45.0 months, IQR: 17.5-72.5] and longest in women with <2 ACPA and BMI<25kg/m2 [125.0 months, IQR: 72.0-161.0] (pairwise log-rank p = 0.002). CONCLUSION Elevated BMI and presence of ACPA interacted to increase RA risk. Time to RA onset was shortest among overweight/obese women with ≥2 ACPA.
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Affiliation(s)
- Sara K Tedeschi
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115.
| | - Jing Cui
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115
| | | | - William H Robinson
- Division of Immunology and Rheumatology, Stanford University, Palo Alto, CA
| | - Jeremy Sokolove
- Division of Immunology and Rheumatology, Stanford University, Palo Alto, CA
| | - Nithya Lingampalli
- Division of Immunology and Rheumatology, Stanford University, Palo Alto, CA
| | - Jeffrey A Sparks
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115
| | - Elizabeth W Karlson
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115
| | - Karen H Costenbader
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, 75 Francis St, Boston, MA 02115
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39
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Boeters DM, Mangnus L, Ajeganova S, Lindqvist E, Svensson B, Toes REM, Trouw LA, Huizinga TWJ, Berenbaum F, Morel J, Rantapää-Dahlqvist S, van der Helm-van Mil AHM. The prevalence of ACPA is lower in rheumatoid arthritis patients with an older age of onset but the composition of the ACPA response appears identical. Arthritis Res Ther 2017; 19:115. [PMID: 28569212 PMCID: PMC5452396 DOI: 10.1186/s13075-017-1324-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 05/09/2017] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Rheumatoid arthritis (RA) consists of two syndromes, one autoantibody-positive and one autoantibody-negative. Existing data on the relation between age of onset and prevalence of autoantibodies were conflicting. Therefore this multicohort study assessed the age of onset in relation to the presence of autoantibodies. The association with characteristics of the anti-citrullinated protein antibodies (ACPA) response was also explored. METHODS The 1987 criteria-positive RA patients included in the Leiden EAC, BARFOT, ESPOIR, Umeå and Lund cohorts (n = 3321) were studied at presentation for age of onset and the presence of ACPA, rheumatoid factor (RF) and anti-carbamylated protein (anti-CarP) antibodies. Logistic regression analyses were performed; effect sizes were summarized in inverse-weighted meta-analyses. Within ACPA-positive RA, ACPA level was studied in all cohorts; ACPA isotypes, ACPA fine specificity and ACPA avidity index and clinical characteristics were studied in the Leiden EAC. RESULTS From the age of 50 onward, the proportion of ACPA-negative RA patients increased with age in the five cohorts. Similar observations were made for RF and anti-CarP. The composition of the ACPA response did not change with increasing age of onset with respect to titer, isotype distribution, fine specificity and avidity index. With increasing age of onset, RA patients smoked less often, had higher acute phase reactants and more often had a sub(acute) symptom onset. CONCLUSIONS Data of five cohorts revealed that with older age of onset ACPA-negative RA is more frequent than ACPA-positive RA, while characteristics of ACPA-positive RA as judged by the composition of the ACPA response appeared not age dependent. Further biologic studies are needed to characterize the pathogenesis of ACPA-negative polyarthritis at older age and to promote personalized treatment decisions in ACPA-negative patients in daily practice.
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Affiliation(s)
- Debbie M Boeters
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands.
| | - Lukas Mangnus
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands
| | - Sofia Ajeganova
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands.,Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Elisabet Lindqvist
- Department of Clinical Sciences, Section of Rheumatology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Björn Svensson
- Department of Clinical Sciences, Section of Rheumatology, Lund University, Lund, Sweden
| | - René E M Toes
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands
| | - Leendert A Trouw
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands
| | - Tom W J Huizinga
- Department of Rheumatology C1-R, Leiden University Medical Center, PO Box 9600, Leiden, 2300RC, The Netherlands
| | - Francis Berenbaum
- Department of Rheumatology, Sorbonne University, INSERM UMR_S938, DHU i2B, Assistance Publique-Hôpitaux de Paris, Saint-Antoine Hospital, Paris, France
| | - Jacques Morel
- Department of Rheumatology, Teaching Hospital Lapeyronie and Montpellier University, Montpellier, France
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40
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Relationship Between Smoking and Structural Damage, Autoimmune Antibodies, and Disability in Rheumatoid Arthritis Patients. Arch Rheumatol 2017; 33:45-51. [PMID: 29900983 DOI: 10.5606/archrheumatol.2018.6332] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/03/2017] [Indexed: 11/21/2022] Open
Abstract
Objectives This study aims to investigate the relationship between smoking and structural damage, autoimmune antibodies, and disability in rheumatoid arthritis (RA) patients. Patients and methods This cross-sectional study included 165 RA patients (36 males, 129 females; mean age 52.4±12.8 years; range 21 to 82 years). Disease duration, age at disease onset, smoking habits, rheumatoid factor (RF), and anti-cyclic citrullinated peptide levels were recorded. Morning stiffness, pain with visual analog scale, Health Assessment Questionnaire Scores And Disease Activity Score 28 were calculated. Patients' standard hand radiographs were evaluated. Results Patients were divided into three groups according to their smoking habits. Ninety-nine patients (60%) were never smokers, 45 patients (27.3%) were long-term smokers and 21 patients (12.7%) were new smokers. Three groups were compared for disease activity. Disease activity score 28 scores were 3.2±1.2, 3.2±1.3, and 3.2±1.4, respectively (p>0.05). The erosion score (2.6±5.8, 7.1±10.9, and 11.1±19.2, respectively) and joint space narrowing score (9.9±7.3, 18.6±14.9, and 17.3±12.3, respectively) according to modified Sharp method were significantly lower in never smokers group than other groups (p<0.05). RF titrations were 55.2±58.9, 60.5±63.1, and 84.9±71.5, respectively, and levels of long-term smokers group were significantly higher than the other groups (p<0.05). Joint space narrowing score was 16.2±11.9 and 6.4±10.4 in RF (+) and RF (-) patients, respectively (p<0.05). There was no significant relationship between anti-cyclic citrullinated peptide levels and others parameters. Conclusion Although smoking is known as a poor prognostic factor in RA, there was no correlation between disease activity and smoking in our study. However, less radiographic damage was found in never smokers. Smoking does not appear to correlate with RA disease activity but it may be effective in the long-term joint damage.
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Ji J, Zhang L, Zhang Q, Yin R, Fu T, Li L, Gu Z. Functional disability associated with disease and quality-of-life parameters in Chinese patients with rheumatoid arthritis. Health Qual Life Outcomes 2017; 15:89. [PMID: 28464888 PMCID: PMC5414118 DOI: 10.1186/s12955-017-0659-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 04/19/2017] [Indexed: 01/29/2023] Open
Abstract
Background As an important outcome measure among rheumatoid arthritis (RA) patients, functional disability may contribute to unemployment, loss of work productivity, and impaired quality of life. However, little is known about the risk factors of functional disability in Chinese RA patients. This study aimed (1) to examine the prevalence of functional disability in Chinese RA patients; (2) to explore factors associated with the health assessment questionnaire-disability index (HAQ-DI). Methods A total of 101 RA patients in this cross-sectional study underwent standardized laboratory examinations and responded to the questionnaire for demographic data, the HAQ-DI for functional disability, the Compliance Questionnaire on Rheumatology (CQR) for medication adherence, the Hospital Anxiety and Depression Scale (HADS) for psychological status, and the Short Form 36 health survey (SF-36) for quality of life. Pain, grip/pinch strength, disease activity, and large joint mobility were recorded. Independent samples t-tests, chi-square analyses, and logistic regression modeling were used to analyze the data. Results The mean ± SD age of RA patients was 54.9 ± 11.9 years. Approximately 15.8% RA patients in mainland China experience functional disability (defined as a HAQ-DI score ≥ 1). Long disease duration, pain, high disease activity, a larger number of tender and swollen joints, high C-reactive protein (CRP) level, decreased grip strength, and limitation of shoulder, elbow, wrist, knee, and ankle motion were associated with the HAQ-DI. Participants with functional disability tended to have more severe depressive symptoms and a lower quality of life compared with individuals without functional disability. Stepwise logistic regression analyses found that limitation of wrist extension (P = 0.001) and lower body pain (BP) score (P = 0.001) explained higher HAQ-DI score. Conclusions The present study reported that functional disability was common in Chinese RA patients. A low quality of life and limitation of joint mobility had great impacts on functional disability in Chinese RA patients. Targeted and culturally sensitive interventions should be strengthened to delay the onset of disabilities of this population.
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Affiliation(s)
- Juan Ji
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China
| | - Lijuan Zhang
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China.,School of Nursing, Nantong University, 19th Qixiu Road, 226001, Nantong, People's Republic of China
| | - Qiuxiang Zhang
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China.,School of Nursing, Nantong University, 19th Qixiu Road, 226001, Nantong, People's Republic of China
| | - Rulan Yin
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China.,School of Nursing, Nantong University, 19th Qixiu Road, 226001, Nantong, People's Republic of China
| | - Ting Fu
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China.,School of Nursing, Nantong University, 19th Qixiu Road, 226001, Nantong, People's Republic of China
| | - Liren Li
- School of Nursing, Nantong University, 19th Qixiu Road, 226001, Nantong, People's Republic of China.
| | - Zhifeng Gu
- Department of Rheumatology, Affiliated Hospital of Nantong University, 20th Xisi Road, 226001, Nantong, People's Republic of China.
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Joshua V, Chatzidionisyou K, Catrina AI. Role of the lung in individuals at risk of rheumatoid arthritis. Best Pract Res Clin Rheumatol 2017; 31:31-41. [DOI: 10.1016/j.berh.2017.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/31/2017] [Accepted: 06/12/2017] [Indexed: 10/18/2022]
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Alpizar-Rodriguez D, Brulhart L, Mueller RB, Möller B, Dudler J, Ciurea A, Walker UA, Von Mühlenen I, Kyburz D, Zufferey P, Mahler M, Bas S, Gascon D, Lamacchia C, Roux-Lombard P, Lauper K, Nissen MJ, Courvoisier DS, Gabay C, Finckh A. The prevalence of anticitrullinated protein antibodies increases with age in healthy individuals at risk for rheumatoid arthritis. Clin Rheumatol 2017; 36:677-682. [DOI: 10.1007/s10067-017-3547-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 12/21/2016] [Accepted: 01/14/2017] [Indexed: 12/20/2022]
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van Zanten A, Arends S, Roozendaal C, Limburg PC, Maas F, Trouw LA, Toes REM, Huizinga TWJ, Bootsma H, Brouwer E. Presence of anticitrullinated protein antibodies in a large population-based cohort from the Netherlands. Ann Rheum Dis 2017; 76:1184-1190. [PMID: 28043998 PMCID: PMC5530344 DOI: 10.1136/annrheumdis-2016-209991] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 11/18/2016] [Accepted: 11/20/2016] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To determine the prevalence of anticitrullinated protein antibodies (ACPAs) and their association with known rheumatoid arthritis (RA) risk factors in the general population. METHODS Lifelines is a multidisciplinary prospective population-based cohort study in the Netherlands. Cross-sectional data from 40 136 participants were used. The detection of ACPA was performed by measuring anti-CCP2 on the Phadia-250 analyser with levels ≥6.2 U/mL considered positive. An extensive questionnaire was taken on demographic and clinical information, including smoking, periodontal health and early symptoms of musculoskeletal disorders. RA was defined by a combination of self-reported RA, medication use for the indication of rheumatism and visiting a medical specialist within the last year. RESULTS Of the total 40 136 unselected individuals, 401 (1.0%) had ACPA level ≥6.2 U/mL. ACPA positivity was significantly associated with older age, female gender, smoking, joint complaints, RA and first degree relatives with rheumatism. Of the ACPA-positive participants, 22.4% had RA (15.2% had defined RA according to our criteria and 7.2% self-reported RA only). In participants without RA, 311 (0.8%) were ACPA-positive. In the non-RA group, older age, smoking and joint complaints remained significantly more frequently present in ACPA-positive compared with ACPA-negative participants. CONCLUSIONS In this large population-based study, the prevalence of ACPA levels ≥6.2 U/mL was 1.0% for the total group and 0.8% when excluding patients with RA. Older age, smoking and joint complaints were more frequently present in ACPA-positive Lifelines participants. To our knowledge, this study is the largest study to date on ACPA positivity in the general, mostly Caucasian population.
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Affiliation(s)
- A van Zanten
- Department of Rheumatology and Clinical Immunology, Groningen, The Netherlands
| | - S Arends
- Department of Rheumatology and Clinical Immunology, Groningen, The Netherlands
| | - C Roozendaal
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - P C Limburg
- Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F Maas
- Department of Rheumatology and Clinical Immunology, Groningen, The Netherlands
| | - L A Trouw
- Department of Rheumatology, LUMC, Leiden, The Netherlands
| | - R E M Toes
- Department of Rheumatology, LUMC, Leiden, The Netherlands
| | - T W J Huizinga
- Department of Rheumatology, LUMC, Leiden, The Netherlands
| | - H Bootsma
- Department of Rheumatology and Clinical Immunology, Groningen, The Netherlands
| | - E Brouwer
- Department of Rheumatology and Clinical Immunology, Groningen, The Netherlands
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The role of anticitrullinated protein antibodies in the early stages of rheumatoid arthritis. Curr Opin Rheumatol 2016; 28:275-81. [PMID: 26945334 DOI: 10.1097/bor.0000000000000277] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW This review provides an update on the recent discoveries on the role of anticitrullinated protein antibodies (ACPA) in early rheumatoid arthritis (RA). RECENT FINDINGS RA is characterized by an immune response against posttranslationally modified proteins, in particular citrullinated proteins. Recent studies have found that the ACPA response matures shortly before clinical disease manifests itself and is characterized by an increase in titre, isotype switching, antigen-recognition profile, and a change in the Fc-glycosylation pattern. To date, many citrullinated autoantigens have been identified and novel studies suggest that the human leucocyte antigen class II locus may directly influence the maturation of the ACPA response via antigen-specific T cells. Clinical studies have demonstrated that effective treatment of arthritis can lead to reduced ACPA levels or a change in composition of ACPA. In addition to ACPA, autoantibodies targeting other posttranslational modifications have been identified and may be associated with disease prognosis. SUMMARY Key studies have demonstrated that autoimmunity against citrullinated proteins is already present in preclinical RA and matures over time. Future studies are required to reveal whether autoantibodies and the B cells that produce them play a role in disease development or can function as biomarkers for disease maturation.
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Malmström V, Catrina AI, Klareskog L. The immunopathogenesis of seropositive rheumatoid arthritis: from triggering to targeting. Nat Rev Immunol 2016; 17:60-75. [PMID: 27916980 DOI: 10.1038/nri.2016.124] [Citation(s) in RCA: 278] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Patients with rheumatoid arthritis can be divided into two major subsets characterized by the presence versus absence of antibodies to citrullinated protein antigens (ACPAs) and of rheumatoid factor (RF). The antibody-positive subset of disease, also known as seropositive rheumatoid arthritis, constitutes approximately two-thirds of all cases of rheumatoid arthritis and generally has a more severe disease course. ACPAs and RF are often present in the blood long before any signs of joint inflammation, which suggests that the triggering of autoimmunity may occur at sites other than the joints (for example, in the lung). This Review summarizes recent progress in our understanding of this gradual disease development in seropositive patients. We also emphasize the implications of this new understanding for the development of preventive and therapeutic strategies. Similar temporal and spatial separation of immune triggering and clinical manifestations, with novel opportunities for early intervention, may also occur in other immune-mediated diseases.
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Affiliation(s)
- Vivianne Malmström
- Rheumatology Unit, Department of Medicine at Solna, Karolinska University Hospital, Karolinska Institute, 171 76 Stockholm, Sweden
| | - Anca I Catrina
- Rheumatology Unit, Department of Medicine at Solna, Karolinska University Hospital, Karolinska Institute, 171 76 Stockholm, Sweden
| | - Lars Klareskog
- Rheumatology Unit, Department of Medicine at Solna, Karolinska University Hospital, Karolinska Institute, 171 76 Stockholm, Sweden
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van Wesemael TJ, Ajeganova S, Humphreys J, Terao C, Muhammad A, Symmons DPM, MacGregor AJ, Hafström I, Trouw LA, van der Helm-van Mil AHM, Huizinga TWJ, Mimori T, Toes REM, Matsuda F, Svensson B, Verstappen SMM, van der Woude D. Smoking is associated with the concurrent presence of multiple autoantibodies in rheumatoid arthritis rather than with anti-citrullinated protein antibodies per se: a multicenter cohort study. Arthritis Res Ther 2016; 18:285. [PMID: 27906045 PMCID: PMC5134292 DOI: 10.1186/s13075-016-1177-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 11/10/2016] [Indexed: 12/03/2022] Open
Abstract
Background The contribution of smoking to rheumatoid arthritis (RA) is hypothesized to be mediated through formation of anti-citrullinated protein antibodies (ACPA). In RA, however, autoantibodies such as ACPA, rheumatoid factor (RF), and anti-carbamylated protein antibodies (anti-CarP) often occur together, and it is thus unclear whether smoking is specifically associated with some autoantibodies rather than others. We therefore investigated whether smoking is only associated with ACPA or with the presence of multiple RA-related autoantibodies. Methods A population-based Japanese cohort (n = 9575) was used to investigate the association of smoking with RF and anti-cyclic citrullinated peptide antibodies (anti-CCP2) in individuals without RA. Furthermore, RA patients fulfilling the 1987 criteria from three early arthritis cohorts from the Netherlands (n = 678), the United Kingdom (n = 761), and Sweden (n = 795) were used. Data on smoking, RF, anti-CCP2, and anti-CarP were available. A total score of autoantibodies was calculated, and odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated by logistic regression. Results In the population-based non-RA cohort, no association was found between smoking and one autoantibody (RF or anti-CCP2), but smoking was associated with double-autoantibody positivity (OR 2.95, 95% CI 1.32–6.58). In RA patients, there was no association between smoking and the presence of one autoantibody (OR 0.99, 95% CI 0.78–1.26), but smoking was associated with double-autoantibody positivity (OR 1.32, 95% CI 1.04–1.68) and triple-autoantibody positivity (OR 2.05, 95% CI 1.53–2.73). Conclusions Smoking is associated with the concurrent presence of multiple RA-associated autoantibodies rather than just ACPA. This indicates that smoking is a risk factor for breaking tolerance to multiple autoantigens in RA. Electronic supplementary material The online version of this article (doi:10.1186/s13075-016-1177-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Tineke J van Wesemael
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands.
| | - Sofia Ajeganova
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands.,Rheumatology Unit, Department of Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Jennifer Humphreys
- Arthritis Research UK Centre for Epidemiology, University of Manchester, Manchester, UK
| | - Chikashi Terao
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Center for the Promotion of Interdisciplinary Education and Research, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Division of Genetics, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Program in Medical and Population Genetics, Broad Institute, Cambridge, MA, USA
| | - Ammar Muhammad
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Deborah P M Symmons
- Arthritis Research UK Centre for Epidemiology, University of Manchester, Manchester, UK.,NIHR Manchester Musculoskeletal Biomedical Research Unit, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | | | - Ingiäld Hafström
- Rheumatology Unit, Department of Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Leendert A Trouw
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Annette H M van der Helm-van Mil
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Tom W J Huizinga
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Tsuneyo Mimori
- Department of Rheumatology and Clinical Immunology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - René E M Toes
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
| | - Fumihiko Matsuda
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Björn Svensson
- Department of Clinical Sciences, Section of Rheumatology, Lund University, Lund, Sweden
| | | | - Diane van der Woude
- Department of Rheumatology C1-R, Leiden University Medical Center, Albinusdreef 2, PO Box 9600, 2300 RC, Leiden, The Netherlands
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Hensvold AH, Frisell T, Magnusson PKE, Holmdahl R, Askling J, Catrina AI. How well do ACPA discriminate and predict RA in the general population: a study based on 12 590 population-representative Swedish twins. Ann Rheum Dis 2016; 76:119-125. [DOI: 10.1136/annrheumdis-2015-208980] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 04/10/2016] [Accepted: 04/11/2016] [Indexed: 11/04/2022]
Abstract
ObjectiveAnti-citrullinated protein antibodies (ACPA) are highly specific for rheumatoid arthritis (RA), but the diagnostic accuracy of ACPA in the general population has not been thoroughly assessed. We aimed to assess the diagnostic accuracy of ACPA for RA in the general population and to further characterise the citrullinated peptide recognition pattern.MethodsSerum samples from a large population-representative twin cohort consisting of 12 590 individuals were analysed for the presence of ACPA using anti-CCP2 ELISA. All ACPA-positive samples were further tested on ELISAs for four peptide-specific ACPA. RA cases were identified by linkage to the Swedish National Patient Register at inclusion and after a median follow-up of 37 months (IQR 31–49).Results350 out of 12 590 individuals had a positive anti-CCP2 test, measuring ACPA. Of these, 103 had an RA diagnosis at the time of blood donation and inclusion. During a median follow-up of 3 years, an additional 21 of the remaining 247 ACPA-positive individuals developed RA. Overall, a positive anti-CCP2 test had a positive predictive value of 29% for prevalent RA at inclusion (negative predictive value of 99.6%). High titres (>3× cut-off) of anti-CCP2 increased the positive predictive value to 48% (negative predictive value of 99.5%). ACPA-positive individuals without RA had lower anti-CCP2 titres and fewer peptide-specific ACPA than ACPA-positive patients with RA and higher C reactive protein levels than ACPA-negative individuals without RA.ConclusionPresence of ACPA and especially high titres of anti-CCP2 have a high diagnostic accuracy for an RA diagnosis in a population setting.
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Terao C, Yamakawa N, Yano K, Markusse IM, Ikari K, Yoshida S, Furu M, Hashimoto M, Ito H, Fujii T, Ohmura K, Murakami K, Takahashi M, Hamaguchi M, Tabara Y, Taniguchi A, Momohara S, Raychaudhuri S, Allaart CF, Yamanaka H, Mimori T, Matsuda F. Rheumatoid Factor Is Associated With the Distribution of Hand Joint Destruction in Rheumatoid Arthritis. Arthritis Rheumatol 2016; 67:3113-23. [PMID: 26245322 DOI: 10.1002/art.39306] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 07/23/2015] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Rheumatoid arthritis (RA) is a chronic disease leading to joint destruction. Although many studies have addressed factors potentially correlated with the speed of joint destruction, less attention has been paid to the distribution of joint destruction in patients with RA. In this study, destruction of the hand bones in patients with RA was classified into 2 anatomic subgroups, the fingers and the non-fingers, with the aim of analyzing which factors are associated with destruction of the finger joints. METHODS A total of 1,215 Japanese patients with RA were recruited from 2 different populations. The degree of joint destruction was assessed using the total modified Sharp/van der Heijde score (SHS) of radiographic joint damage. The SHS score of joint damage in the finger joints was used as the dependent variable, and the SHS score in the non-finger joints was used as a covariate. Age, sex, disease duration, smoking, C-reactive protein level, treatment for RA, and positivity for and levels of anti-citrullinated protein antibodies and rheumatoid factor (RF) were evaluated as candidate correlates. Overall effect sizes were assessed in a meta-analysis. In addition, associations observed in the Japanese patients were compared to those in a cohort of 157 Dutch RA patients in the BeSt study (a randomized, controlled trial involving 4 different strictly specified treatment strategies for early RA). RESULTS Not surprisingly, disease duration in Japanese patients with RA was associated with the finger SHS score (P ≤ 0.00037). Both positivity for and levels of RF showed significant associations with the finger SHS score after adjustment for covariates (P = 0.0022 and P = 8.1 × 10(-7) , respectively). These associations were also true in relation to the time-averaged finger SHS score. An association between RF positivity and the finger SHS score was also observed in Dutch patients with RA in the BeSt study (P = 0.049). CONCLUSION Positivity for and levels of RF are associated with finger joint destruction independent of non-finger joint destruction and other covariates. Our findings suggest that there are different mechanisms of joint destruction operating in the finger joints of patients with RA.
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Affiliation(s)
- Chikashi Terao
- Kyoto University Graduate School of Medicine, Kyoto, Japan, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, and Broad Institute, Cambridge, Massachusetts
| | | | | | | | - Katsunori Ikari
- Tokyo Women's Medical University and CREST Program, Japan Science and Technology Agency, Tokyo, Japan
| | | | - Moritoshi Furu
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | - Hiromu Ito
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takao Fujii
- Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | | | - Masahide Hamaguchi
- Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
| | | | | | | | - Soumya Raychaudhuri
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, Broad Institute, Cambridge, Massachusetts, and University of Manchester and Manchester Academic Health Sciences Centre, Manchester, UK
| | | | | | - Tsuneyo Mimori
- Kyoto University Graduate School of Medicine, Kyoto, Japan
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50
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Kim K, Jiang X, Cui J, Lu B, Costenbader KH, Sparks JA, Bang SY, Lee HS, Okada Y, Raychaudhuri S, Alfredsson L, Bae SC, Klareskog L, Karlson EW. Interactions between amino acid-defined major histocompatibility complex class II variants and smoking in seropositive rheumatoid arthritis. Arthritis Rheumatol 2016; 67:2611-23. [PMID: 26098791 DOI: 10.1002/art.39228] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 06/02/2015] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To define the interaction between cigarette smoking and HLA polymorphisms in seropositive rheumatoid arthritis (RA), in the context of a recently identified amino acid-based HLA model for RA susceptibility. METHODS We imputed Immunochip data on HLA amino acids and classical alleles from 3 case-control studies (the Swedish Epidemiological Investigation of Rheumatoid Arthritis [EIRA] study [1,654 cases and 1,934 controls], the Nurses' Health Study [NHS] [229 cases and 360 controls], and the Korean RA Cohort Study [1,390 cases and 735 controls]). We examined the interaction effects of heavy smoking (>10 pack-years) and the genetic risk score (GRS) of multiple RA-associated amino acid positions (positions 11, 13, 71, and 74 in HLA-DRβ1, position 9 in HLA-B, and position 9 in HLA-DPβ1), as well as the interaction effects of heavy smoking and the GRS of HLA-DRβ1 4-amino acid haplotypes (assessed via attributable proportion due to interaction [AP] using the additive interaction model). RESULTS Heavy smoking and all investigated HLA amino acid positions and haplotypes were associated with RA susceptibility in the 3 populations. In the interaction analysis, we found a significant deviation from the expected additive joint effect between heavy smoking and the HLA-DRβ1 4-amino acid haplotype (AP 0.416, 0.467, and 0.796, in the EIRA, NHS, and Korean studies, respectively). We further identified the key interacting variants as being located at HLA-DRβ1 amino acid positions 11 and 13 but not at any of the other RA risk-associated amino acid positions. For residues in positions 11 and 13, there were similar patterns between RA risk effects and interaction effects. CONCLUSION Our findings of significant gene-environment interaction effects indicate that a physical interaction between citrullinated autoantigens produced by smoking and HLA-DR molecules is characterized by the HLA-DRβ1 4-amino acid haplotype, primarily by positions 11 and 13.
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Affiliation(s)
- Kwangwoo Kim
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, and Broad Institute, Cambridge, Massachusetts
| | - Xia Jiang
- Karolinska Institute, Stockholm, Sweden
| | - Jing Cui
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, and Broad Institute, Cambridge, Massachusetts
| | - Bing Lu
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Karen H Costenbader
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Jeffrey A Sparks
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - So-Young Bang
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
| | - Hye-Soon Lee
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
| | - Yukinori Okada
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, Broad Institute, Cambridge, Massachusetts, Tokyo Medical and Dental University, Tokyo, Japan, and RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Soumya Raychaudhuri
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, Broad Institute, Cambridge, Massachusetts, and Manchester Academic Health Sciences Centre, Manchester, UK
| | | | - Sang-Cheol Bae
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Republic of Korea
| | - Lars Klareskog
- Karolinska Institutet and Karolinska Hospital, Stockholm, Sweden
| | - Elizabeth W Karlson
- Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
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