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Vercammen M, Bonroy C, Broeders S, Chan EKL, Bizzaro N, Bogdanos DP, Andrade L, Coucke W, de Melo Cruvinel W, Kozmar A, Kuhi L, Lutteri L, Rego de Sousa MJ, Schouwers S, Van Hoovels L, Bossuyt X. Analytical aspects of the antinuclear antibody test by HEp-2 indirect immunofluorescence: EFLM report on an international survey. Clin Chem Lab Med 2023; 61:1199-1208. [PMID: 36989428 DOI: 10.1515/cclm-2023-0210] [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: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 03/31/2023]
Abstract
OBJECTIVES Detection of antinuclear antibodies (ANA) by indirect immunofluorescence assay using HEp-2 cells (HEp-2 IFA) is used to screen for various autoimmune diseases. HEp-2 IFA suffers from variability, which hampers harmonization. METHODS A questionnaire was developed to collect information on HEp-2 IFA methodology, computer-assisted diagnosis (CAD) systems, training, inter-observer variability, quality assessment, reagent lot change control, and method verification. The questionnaire was distributed to laboratories by Sciensano (Belgium), national EASI groups (Italy, Croatia, Portugal, Estonia, Greece) and ICAP (worldwide). Answers were obtained by 414 laboratories. The results were analysed in the framework of the recent EFLM/EASI/ICAP ANA recommendations (companion paper). RESULTS Laboratories used either HEp-2, HEp-2000, or HEp-20-10 cells and most laboratories (80%) applied the same screening dilution for children and adults. The conjugate used varied between laboratories [IgG-specific (in 57% of laboratories) vs. polyvalent]. Sixty-nine percent of CAD users reviewed the automatic nuclear pattern and 53% of CAD users did not fully exploit the fluorescence intensity for quality assurance. Internal quality control was performed by 96% of the laboratories, in 52% of the laboratories only with strongly positive samples. Interobserver variation was controlled by 79% of the laboratories. Limited lot-to-lot evaluation was performed by 68% of the laboratories. Method verification was done by 80% of the respondents. CONCLUSIONS Even though many laboratories embrace high-quality HEp-2 IFA, substantial differences in how HEp-2 IFA is performed and controlled remain. Acting according to the EFLM/EASI/ICAP ANA recommendations can improve the global performance and quality of HEp-2 IFA and nurture harmonization.
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Affiliation(s)
- Martine Vercammen
- Department of Laboratory Medicine, AZ St-Jan Hospital Bruges-Ostend, Bruges, Belgium
- Reproductive Immunology and Transplantation, Vrije Universiteit Brussel, Brussels, Belgium
| | - Carolien Bonroy
- Department of Laboratory Medicine, University Hospital Ghent, Ghent, Belgium
- Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
| | | | - Edward K L Chan
- Department of Oral Biology, University of Florida, Gainesville, FL, USA
| | - Nicola Bizzaro
- Laboratory of Clinical Pathology, Azienda Sanitaria Universitaria Integrata di Udine, Tolmezzo, Italy
| | - Dimitrios P Bogdanos
- Department of Rheumatology and Clinical Immunology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Volos, Greece
- University General Hospital of Larissa, Larissa, Greece
| | - Luis Andrade
- Rheumatology Division, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Immunology Division, Fleury Medicine and Health Laboratories, Sao Paulo, Brazil
| | - Wim Coucke
- Sciensano, Quality of Laboratories, Brussels, Belgium
| | | | - Ana Kozmar
- Department of Laboratory Diagnostics, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Liisa Kuhi
- Central Laboratory, East Tallinn Central Hospital, Tallinn, Estonia
| | - Laurence Lutteri
- Department of Clinical Chemistry, CHU Sart-Tilman, Liège, Belgium
| | | | - Sofie Schouwers
- Department of Laboratory Medicine, GZA Hospital, Antwerp, Belgium
| | - Lieve Van Hoovels
- Department of Laboratory Medicine, OLV Hospital Aalst, Aalst, Belgium
- Clinical and Diagnostic Immunology, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Department of Laboratory Medicine, UZ Leuven, Leuven, Belgium
| | - Xavier Bossuyt
- Clinical and Diagnostic Immunology, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Department of Laboratory Medicine, UZ Leuven, Leuven, Belgium
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Bonroy C, Vercammen M, Fierz W, Andrade LEC, Van Hoovels L, Infantino M, Fritzler MJ, Bogdanos D, Kozmar A, Nespola B, Broeders S, Patel D, Herold M, Zheng B, Chan EYT, Uibo R, Haapala AM, Musset L, Sack U, Nagy G, Sundic T, Fischer K, Rego de Sousa MJ, Vargas ML, Eriksson C, Heijnen I, García-De La Torre I, Carballo OG, Satoh M, Kim KH, Chan EKL, Damoiseaux J, Lopez-Hoyos M, Bossuyt X. Detection of antinuclear antibodies: recommendations from EFLM, EASI and ICAP. Clin Chem Lab Med 2023; 61:1167-1198. [PMID: 36989417 DOI: 10.1515/cclm-2023-0209] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 03/31/2023]
Abstract
OBJECTIVES Antinuclear antibodies (ANA) are important for the diagnosis of various autoimmune diseases. ANA are usually detected by indirect immunofluorescence assay (IFA) using HEp-2 cells (HEp-2 IFA). There are many variables influencing HEp-2 IFA results, such as subjective visual reading, serum screening dilution, substrate manufacturing, microscope components and conjugate. Newer developments on ANA testing that offer novel features adopted by some clinical laboratories include automated computer-assisted diagnosis (CAD) systems and solid phase assays (SPA). METHODS A group of experts reviewed current literature and established recommendations on methodological aspects of ANA testing. This process was supported by a two round Delphi exercise. International expert groups that participated in this initiative included (i) the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) Working Group "Autoimmunity Testing"; (ii) the European Autoimmune Standardization Initiative (EASI); and (iii) the International Consensus on ANA Patterns (ICAP). RESULTS In total, 35 recommendations/statements related to (i) ANA testing and reporting by HEp-2 IFA; (ii) HEp-2 IFA methodological aspects including substrate/conjugate selection and the application of CAD systems; (iii) quality assurance; (iv) HEp-2 IFA validation/verification approaches and (v) SPA were formulated. Globally, 95% of all submitted scores in the final Delphi round were above 6 (moderately agree, agree or strongly agree) and 85% above 7 (agree and strongly agree), indicating strong international support for the proposed recommendations. CONCLUSIONS These recommendations are an important step to achieve high quality ANA testing.
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Affiliation(s)
- Carolien Bonroy
- Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
- Department of Laboratory Medicine, University Hospital Ghent, Ghent, Belgium
| | - Martine Vercammen
- Department of Laboratory Medicine, AZ Sint-Jan, Brugge, Belgium
- Research Group REIM, Vrije Universiteit Brussel, Brussels, Belgium
| | - Walter Fierz
- Schweizerischer Verband der Diagnostikindustrie (SVDI-ASID), Bern, Switzerland
| | - Luis E C Andrade
- Rheumatology Division, Escola Paulista de Medicina, Universidade Federal de Sao Paulo, Sao Paulo, Brazil
- Immunology Division, Fleury Medicine and Health Laboratories, Sao Paulo, Brazil
| | - Lieve Van Hoovels
- Department of Laboratory Medicine, OLV Hospital, Aalst, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
| | - Maria Infantino
- Immunology and Allergology Laboratory, S. Giovanni di Dio Hospital, Florence, Italy
| | - Marvin J Fritzler
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Dimitrios Bogdanos
- Department of Rheumatology and Clinical Immunology, Faculty of Medicine, School of Health Sciences, University of Thessaly, University General Hospital of Larissa, Larissa, Greece
| | - Ana Kozmar
- Department of Laboratory Diagnostics, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Benoit Nespola
- Laboratory of Immunology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | | | - Dina Patel
- UK NEQAS Immunology, Immunochemistry & Allergy, Sheffield Teaching Hospitals, Sheffield, UK
| | - Manfred Herold
- Department of Internal Medicine II, Rheumatology Laboratory, Medical University of Innsbruck, Innsbruck, Austria
| | - Bing Zheng
- Department of Laboratory Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Eric Y T Chan
- Department of Pathology, Queen Mary Hospital, Hong Kong, P.R. China
| | - Raivo Uibo
- Department of Immunology, Medical Faculty, University of Tartu, Tartu, Estonia
| | | | - Lucile Musset
- Department of Immunology, Assistance Publique-Hôpitaux de Paris, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Ulrich Sack
- Medical Faculty, Leipzig University, Leipzig, Germany
| | - Gabor Nagy
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Tatjana Sundic
- Department of Immunology and Transfusion Medicine, Haugesund Hospital, Helse Fonna, Haugesund, Norway
| | - Katarzyna Fischer
- Individual Laboratory for Rheumatologic Diagnostics, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Maria-José Rego de Sousa
- Immunopathology and Autoimmunity Department, Centro de Medicina Laboratorial Germano de Sousa, Lisbon, Portugal
| | | | - Catharina Eriksson
- Department of Clinical Microbiology Section of Infection and Immunology, Umeå University, Umeå, Sweden
| | - Ingmar Heijnen
- Immunology, Laboratory Medicine, University Hospital Basel, Basel, Switzerland
| | - Ignacio García-De La Torre
- Department of Immunology and Rheumatology, Hospital General de Occidente, Universidad de Guadalajara, Guadalajara, Mexico
| | - Orlando Gabriel Carballo
- Laboratory of Immunology, Hospital Carlos G. Durand, Buenos Aires, Argentina
- Department of Microbiology and Immunology, Instituto Universitario, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Minoru Satoh
- Department of Human, Information and Life Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
- Department of Medicine, Kitakyushu Yahata-Higashi Hospital, Kitakyushu, Japan
| | - Kyeong-Hee Kim
- Department of Laboratory Medicine, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Edward K L Chan
- Department of Oral Biology, University of Florida, Gainesville, FL, USA
| | - Jan Damoiseaux
- Central Diagnostic Laboratory, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Marcos Lopez-Hoyos
- Immunology Service, University Hospital Marques de Valdecilla-IDIVAL, University of Cantabria, Santander, Spain
| | - Xavier Bossuyt
- Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven, Belgium
- Department of Laboratory Medicine, University Hospital Leuven, Leuven, Belgium
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Choi MY, Clarke AE, Urowitz M, Hanly J, St-Pierre Y, Gordon C, Bae SC, Romero-Diaz J, Sanchez-Guerrero J, Bernatsky S, Wallace DJ, Isenberg D, Rahman A, Merrill JT, Fortin PR, Gladman DD, Bruce IN, Petri M, Ginzler EM, Dooley MA, Ramsey-Goldman R, Manzi S, Jönsen A, Alarcón GS, van Vollenhoven RF, Aranow C, Mackay M, Ruiz-Irastorza G, Lim S, Inanc M, Kalunian K, Jacobsen S, Peschken C, Kamen DL, Askanase A, Buyon JP, Costenbader KH, Fritzler MJ. Longitudinal analysis of ANA in the Systemic Lupus International Collaborating Clinics (SLICC) Inception Cohort. Ann Rheum Dis 2022; 81:1143-1150. [PMID: 35338033 PMCID: PMC10066935 DOI: 10.1136/annrheumdis-2022-222168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/12/2022] [Indexed: 12/21/2022]
Abstract
OBJECTIVES A perception derived from cross-sectional studies of small systemic lupus erythematosus (SLE) cohorts is that there is a marked discrepancy between antinuclear antibody (ANA) assays, which impacts on clinicians' approach to diagnosis and follow-up. We compared three ANA assays in a longitudinal analysis of a large international incident SLE cohort retested regularly and followed for 5 years. METHODS Demographic, clinical and serological data was from 805 SLE patients at enrolment, year 3 and 5. Two HEp-2 indirect immunofluorescence assays (IFA1, IFA2), an ANA ELISA, and SLE-related autoantibodies were performed in one laboratory. Frequencies of positivity, titres or absorbance units (AU), and IFA patterns were compared using McNemar, Wilcoxon and kappa statistics, respectively. RESULTS At enrolment, ANA positivity (≥1:80) was 96.1% by IFA1 (median titre 1:1280 (IQR 1:640-1:5120)), 98.3% by IFA2 (1:2560 (IQR 1:640-1:5120)) and 96.6% by ELISA (176.3 AU (IQR 106.4 AU-203.5 AU)). At least one ANA assay was positive for 99.6% of patients at enrolment. At year 5, ANA positivity by IFAs (IFA1 95.2%; IFA2 98.9%) remained high, while there was a decrease in ELISA positivity (91.3%, p<0.001). Overall, there was >91% agreement in ANA positivity at all time points and ≥71% agreement in IFA patterns between IFA1 and IFA2. CONCLUSION In recent-onset SLE, three ANA assays demonstrated commutability with a high proportion of positivity and titres or AU. However, over 5 years follow-up, there was modest variation in ANA assay performance. In clinical situations where the SLE diagnosis is being considered, a negative test by either the ELISA or HEp-2 IFA may require reflex testing.
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Affiliation(s)
- May Yee Choi
- Medicine, Division of Rheumatology, University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada
| | - Ann Elaine Clarke
- Medicine, Division of Rheumatology, University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada
| | - Murray Urowitz
- Center for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - John Hanly
- Queen Elizabeth II Health Sciences Centre and Dalhousie University, Halifax, Nova Scotia, Canada
| | - Yvan St-Pierre
- Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Caroline Gordon
- Rheumatology Research Group, Institute of Inflammation and Ageing, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Sang-Cheol Bae
- Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea (the Republic of)
| | | | - Jorge Sanchez-Guerrero
- Center for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - Sasha Bernatsky
- Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Daniel J Wallace
- Cedars-Sinai/David Geffen School of Medicine at the University of California, Los Angeles, California, USA
| | | | | | - Joan T Merrill
- Clinical Pharmacology, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
| | - Paul R Fortin
- CHU de Québec, Universite Laval, Quebec City, Quebec, Canada
| | - Dafna D Gladman
- Center for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | - Ian N Bruce
- Arthritis Research UK Epidemiology Unit, Institute of Inflammation and Repair, Manchester Academic Health Sciences Centre, the University of Manchester, and NIHR Manchester Musculoskeletal Biomedical Research Unit, Central Manchester University Hospitals National Health Service Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Michelle Petri
- Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ellen M Ginzler
- State University of New York Downstate Medical Center, Brooklyn, New York, USA
| | - Mary Anne Dooley
- Thurston Arthritis Research Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | | | - Susan Manzi
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | | | | | | | - Cynthia Aranow
- Feinstein Institute for Medical Research, Manhasset, New York, USA
| | - Meggan Mackay
- Feinstein Institute for Medical Research, Manhasset, New York, USA
| | - Guillermo Ruiz-Irastorza
- BioCruces Health Research Institute, Hospital Universitario Cruces, University of the Basque Country, Barakaldo, Spain
| | - Sam Lim
- Emory University School of Medicine, Atlanta, Georgia, USA
| | | | - Ken Kalunian
- University of California Los Angeles School of Medicine, La Jolla, California, USA
| | - Søren Jacobsen
- Copenhagen Lupus and Vasculitis Clinic, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Diane L Kamen
- Medical University of South Carolina, Charleston, South Carolina, USA
| | - Anca Askanase
- Hospital for Joint Diseases, New York University Seligman Center for Advanced Therapeutics, New York, New York, USA
| | - Jill P Buyon
- New York University School of Medicine, New York, New York, USA
| | - Karen H Costenbader
- Department of Medicine, Div of Rheuamtology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Marvin J Fritzler
- Medicine, Division of Rheumatology, University of Calgary Cumming School of Medicine, Calgary, Alberta, Canada
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Ezeh N, Ardalan K, Buhr KA, Nguyen C, Al Ahmed O, Ardoin SP, Barton V, Bell S, Brandling-Bennett H, Castelo-Soccio L, Chiu YE, Chong BF, Lara-Corrales I, Cintosun A, Curran ML, Diaz LZ, Elman SA, Faith EF, Garcia-Romero MT, Grossman-Kranseler J, Hogeling M, Hudson AD, Hunt RD, Ibler EM, Marques MC, Monir RL, Oza V, Paller AS, Putterman E, Rodriguez-Salgado P, Schoch JJ, Truong A, Wang J, Lee LW, Vleugels RA, Klein-Gitelman MS, von Scheven E, Werth VP, Arkin LM. Cross-Sectional Characteristics of Pediatric-Onset Discoid Lupus Erythematosus: Results of a Multicenter, Retrospective Cohort Study. J Am Acad Dermatol 2022; 87:559-566. [PMID: 35487332 PMCID: PMC10082546 DOI: 10.1016/j.jaad.2022.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 11/15/2022]
Abstract
• Discoid lupus may be associated with SLE. In this study, most children with discoid lupus did not have systemic disease. Concurrent SLE was highest in female adolescents (>10 years of age) with generalized discoid lupus, who had clinically aggressive disease. • Discoid lupus in adolescence should prompt thorough evaluation for SLE.
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Affiliation(s)
- N Ezeh
- University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - K Ardalan
- Department of Pediatrics, Duke University School of Medicine, Durham, NC, Departments of Pediatrics and Medical Social Sciences, Northwestern University Feinberg School of Medicine/Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - K A Buhr
- Department of Biostatistics & Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - C Nguyen
- University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - O Al Ahmed
- Department of Pediatrics, Nationwide Children's Hospital/Ohio State University, Columbus OH
| | - S P Ardoin
- Department of Pediatrics, Nationwide Children's Hospital/Ohio State University, Columbus OH
| | - V Barton
- Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina, Charleston, SC
| | - S Bell
- Department of Pediatrics, Division of Rheumatology, University of California at San Francisco, San Francisco, CA
| | - H Brandling-Bennett
- Division of Dermatology; Department of Pediatrics, Seattle Children's Hospital/University of Washington School of Medicine, Seattle, WA
| | - L Castelo-Soccio
- Children's Hospital of Philadelphia, Department of Pediatrics, Section of Dermatology, Children's Hospital of Philadelphia, Philadelphia, PA
| | - Y E Chiu
- Departments of Dermatology (Section of Pediatric Dermatology) and Pediatrics, Medical College of Wisconsin, Milwaukee, WI
| | - B F Chong
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX; Department of Pediatrics, Division of Allergy/Immunology/Rheumatology, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - I Lara-Corrales
- Department of Pediatrics, Section of Dermatology, The Hospital for Sick Children/University of Toronto, Toronto, ON
| | - A Cintosun
- Department of Pediatrics, Section of Dermatology, The Hospital for Sick Children/University of Toronto, Toronto, ON
| | - M L Curran
- Department of Pediatrics, Section of Rheumatology, Children's Hospital Colorado/University of Colorado School of Medicine, Aurora, CO
| | - L Z Diaz
- Department of Pediatrics, Division of Dermatology, Dell Medical School/Dell Children's Hospital, Austin, TX
| | - S A Elman
- Department of Dermatology, Boston's Children Hospital/Harvard Medical School, Boston, MA
| | - E Fernandez Faith
- Department of Pediatrics, Nationwide Children's Hospital/Ohio State University, Columbus OH
| | - M T Garcia-Romero
- Department of Dermatology, National Institute for Pediatrics, Mexico City, MX
| | - J Grossman-Kranseler
- Division of Dermatology; Department of Pediatrics, Seattle Children's Hospital/University of Washington School of Medicine, Seattle, WA
| | - M Hogeling
- Department of Dermatology, University of California at Los Angeles, Los Angeles, CA
| | - A D Hudson
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX
| | - R D Hunt
- Department of Dermatology and Pediatrics, Texas Children's Hospital, Houston, TX
| | - E M Ibler
- Departments of Dermatology (Section of Pediatric Dermatology) and Pediatrics, Medical College of Wisconsin, Milwaukee, WI
| | - M C Marques
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD
| | - R L Monir
- Department of Dermatology, University of Florida School of Medicine, Gainesville, FL
| | - V Oza
- Departments of Pediatrics and Dermatology, New York University Grossman School of Medicine, New York, NY
| | - A S Paller
- Departments of Dermatology and Pediatrics, Northwestern University Feinberg School of Medicine/Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - E Putterman
- Children's Hospital of Philadelphia, Department of Pediatrics, Section of Dermatology, Children's Hospital of Philadelphia, Philadelphia, PA
| | - P Rodriguez-Salgado
- Department of Dermatology, National Institute for Pediatrics, Mexico City, MX
| | - J J Schoch
- Department of Dermatology, University of Florida School of Medicine, Gainesville, FL
| | - A Truong
- Department of Dermatology, University of California at Los Angeles, Los Angeles, CA
| | - J Wang
- Departments of Pediatrics and Dermatology, New York University Grossman School of Medicine, New York, NY
| | - L Wine Lee
- Department of Dermatology and Dermatologic Surgery, Medical University of South Carolina, Charleston, SC
| | - R A Vleugels
- Department of Dermatology, Boston's Children Hospital/Harvard Medical School, Boston, MA
| | - M S Klein-Gitelman
- Department of Pediatrics, Northwestern University Feinberg School of Medicine/Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
| | - E von Scheven
- Department of Pediatrics, Division of Rheumatology, University of California at San Francisco, San Francisco, CA
| | - V P Werth
- Department of Dermatology, Perelman School of Medicine at the University of Pennsylvania and Corporal Michael J. Crescenz VAMC, Philadelphia, PA
| | - L M Arkin
- Departments of Dermatology and Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI.
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5
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Zhang T, Du Y, Wu Q, Li H, Nguyen T, Gidley G, Duran V, Goldman D, Petri M, Mohan C. Salivary anti-nuclear antibody (ANA) mirrors serum ANA in systemic lupus erythematosus. Arthritis Res Ther 2022; 24:3. [PMID: 34980255 PMCID: PMC8721993 DOI: 10.1186/s13075-021-02694-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 12/07/2021] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVES To assay salivary anti-nuclear antibody (ANA) and its isotypes in patients with systemic lupus erythematosus (SLE) and to investigate relevant clinical associations. METHODS Saliva samples were collected from SLE patients and assayed for salivary ANA using immunofluorescence (IF). Isotypes of salivary ANA, including IgG-ANA, IgA-ANA, and IgM-ANA, were quantified using enzyme-linked immunosorbent assay. The correlations between clinical parameters and levels of salivary ANA and isotypes were evaluated. RESULTS Salivary ANA IF intensities were significantly higher in SLE patients than in healthy controls, irrespective of SLE patient disease activity, and strongly correlated with serum ANA titers. Salivary ANA was detected in 67.14% of SLE patients and 10.00% of healthy controls (p < 0.001). Among ANA-positive samples, 80.85% exhibited a nuclear ANA pattern, and 42.55% exhibited a cytoplasmic ANA pattern. Salivary IgG-ANA, IgA-ANA, and IgM-ANA levels, as assayed by ELISA, were significantly increased in both active and less active SLE patients compared with healthy controls, and levels of each isotype were significantly correlated with serum ANA titer. Salivary IgM-ANA levels correlated with the physician global assessment (PGA), SLE disease activity index (SLEDAI), and negatively with serum C3 and C4. Salivary IgG-ANA also correlated with erythrocyte sedimentation rate (ESR), SLEDAI, and negatively with serum C3. CONCLUSION Salivary ANA levels correlate with serum ANA titer, and salivary IgM-ANA and IgG-ANA correlate variably with PGA, SLEDAI, ESR and complement levels. These findings underscore the potential of using salivary ANA and ANA isotypes as surrogates for serum ANA, particularly for future point-of-care applications since saliva is easier to obtain than blood.
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Affiliation(s)
- Ting Zhang
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA.,Present affiliation: The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yong Du
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Qingqing Wu
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Hao Li
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Thao Nguyen
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Gabriel Gidley
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Valeria Duran
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA
| | - Daniel Goldman
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michelle Petri
- Division of Rheumatology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Chandra Mohan
- Biomedical Engineering Department, University of Houston, 3517 Cullen Blvd, Room 2027, TX, Houston, USA.
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6
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Lythgoe H, Lj M, Hedrich CM, Aringer M. Classification of systemic lupus erythematosus in children and adults. Clin Immunol 2021; 234:108898. [PMID: 34856381 DOI: 10.1016/j.clim.2021.108898] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 11/25/2021] [Indexed: 12/24/2022]
Abstract
Systemic Lupus Erythematosus (SLE) is an autoimmune multisystem disease with a variable clinical phenotype and no single clinical, laboratory or pathological feature that can be used as a gold standard for disease classification or diagnosis. Classification criteria have been developed in an attempt to define homogenous groups of SLE patients for clinical research. They have been mainly validated in adult cohorts, given the much lower prevalence of SLE before puberty. The three commonly used sets of current classification criteria and their validation studies to date are described in this review. Challenges relating to classification of SLE patients, including important differences across age-groups and ethnicities, are explored along with future directions in the classification of SLE.
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Affiliation(s)
- H Lythgoe
- Department of Paediatric Rheumatology, Alder Hey Children's NHS Foundation Trust Hospital, Liverpool, UK
| | - McCann Lj
- Department of Paediatric Rheumatology, Alder Hey Children's NHS Foundation Trust Hospital, Liverpool, UK
| | - C M Hedrich
- Department of Paediatric Rheumatology, Alder Hey Children's NHS Foundation Trust Hospital, Liverpool, UK; Department of Women's & Children's Health, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK.
| | - M Aringer
- Department of Rheumatology, Medizinische Klinik und Poliklinik III, Universitätsklinikum Carl Gustav Carus an der Technischen Universität Dresden, Germany.
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7
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Izati AF, Mohd Shukri ND, Wan Ghazali WS, Che Hussin CM, Wong KK. Increased IL-23R + Th Cells Population Exhibits Higher SLEDAI-2K Scores in Systemic Lupus Erythematosus Patients. Front Immunol 2021; 12:690908. [PMID: 34484186 PMCID: PMC8416093 DOI: 10.3389/fimmu.2021.690908] [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: 04/04/2021] [Accepted: 07/27/2021] [Indexed: 01/14/2023] Open
Abstract
The IL-23/IL-17 axis plays causative roles in the development and progression of systemic lupus erythematosus (SLE). However, it remains unclear if the IL-17RA+ and IL-23R+ T helper (Th) cells populations are associated with the serum IL-17 and IL-23 levels, or with the immunological parameters and disease activities in SLE patients. Herein, we examined the proportion of IL-17RA+ and IL-23R+ Th cells and serum levels of IL-17 and IL-23 in established SLE patients (n = 50) compared with healthy controls (n = 50). The associations of these interleukins and their receptors with immunological parameters [anti-nuclear antibody (ANA), anti-dsDNA antibody, and C-reactive protein (CRP)] and SLE disease activity (SLEDAI-2K scores) in SLE patients were assessed. CD3+CD4+ Th cells of SLE patients demonstrated significantly elevated IL-17RA+ (p = 1.12 x 10-4) or IL-23R+ (p = 1.98 x 10-29) populations compared with the healthy controls. Serum IL-17 levels were significantly lower in SLE patients compared with the healthy controls (p = 8.32 x 10-5), while no significant difference was observed for the IL-23 serum levels between both groups. IL-23R+ Th cells population was significantly associated with higher SLEDAI-2K scores (p = 0.017). In multivariate analysis, the proportion of IL-23R+ Th cells remained significantly associated with higher SLEDAI-2K scores independent of prednisolone intake (p = 0.027). No associations were observed between the interleukin parameters (i.e., IL-17, IL-23, IL-17RA+ Th cells, and IL-23R+ Th cells) with ANA, anti-dsDNA, and CRP status, suggesting that the IL-17/IL-23 axis acts independently of these immunological parameters. In conclusion, our results support that therapeutic inhibition of the IL-23/IL-17 axis receptors on Th cells, particularly IL-23R, is potentially relevant in SLE patients.
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Affiliation(s)
- Aziz Farah Izati
- Department of Immunology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.,Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Nur Diyana Mohd Shukri
- Department of Immunology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.,Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Wan Syamimee Wan Ghazali
- Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia.,Department of Internal Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Che Maraina Che Hussin
- Department of Immunology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.,Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia
| | - Kah Keng Wong
- Department of Immunology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, Malaysia.,Hospital Universiti Sains Malaysia, Kubang Kerian, Malaysia
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8
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Wener MH, Fink S, Bashleben C, Sindelar S, Linden MA. Long-Term Variability in Immunofluorescence Titer of Antibodies to Nuclear Antigens Observed in Clinical Laboratory Proficiency Testing Surveys. Arch Pathol Lab Med 2020; 145:937-942. [PMID: 33373439 DOI: 10.5858/arpa.2020-0419-cp] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2020] [Indexed: 11/06/2022]
Abstract
CONTEXT.— Presence of antibodies to nuclear antigens (ANAs) above a threshold titer is an important diagnostic feature of several autoimmune diseases, yet titers reported vary between laboratories. Proficiency survey results can help clarify factors contributing to the variability. OBJECTIVE.— To determine the contribution of HEp-2 ANA kits from different manufacturers to the variation in titers, and assess whether the differences between kits are consistent over the long term. DESIGN.— HEp-2 ANA titers reported by laboratories participating in the external quality assessment proficiency testing surveys conducted by the College of American Pathologists between 2008 and 2018 were analyzed. The ANA titers reported for each specimen were ranked according to the kits being used by testing laboratories, and the statistical significance of the differences was determined. RESULTS.— The ANA titer results were strongly influenced by the HEp-2 ANA kit used (P < .001). During the 11 years studied, the rank order of the ANA titer for each kit relative to the other kits was remarkably consistent. The rank of ANA titer for individual ANA patterns observed for each kit was similar to the overall rank of that kit. CONCLUSIONS.— Variability in ANA titers was strongly associated with the kits used, and the differences between kits were quite consistent during the 11 years studied. Because the variability is not random, it has the potential to be managed by harmonizing kits, which could lead to improved consistency in reporting ANA titers.
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Affiliation(s)
- Mark H Wener
- From the Departments of Laboratory Medicine and Pathology (Wener, Fink).,and Medicine (Wener), University of Washington, Seattle
| | - Susan Fink
- From the Departments of Laboratory Medicine and Pathology (Wener, Fink)
| | - Christine Bashleben
- Laboratory Improvement Programs, Surveys (Bashleben, Sindelar), College of American Pathologists, Northfield, Illinois
| | - Stephanie Sindelar
- Laboratory Improvement Programs, Surveys (Bashleben, Sindelar), College of American Pathologists, Northfield, Illinois
| | - Michael A Linden
- and the Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis (Linden)
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9
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Understanding and interpreting antinuclear antibody tests in systemic rheumatic diseases. Nat Rev Rheumatol 2020; 16:715-726. [PMID: 33154583 DOI: 10.1038/s41584-020-00522-w] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2020] [Indexed: 12/12/2022]
Abstract
Antinuclear antibodies (ANAs) are valuable laboratory markers to screen for and support the diagnosis of various rheumatic diseases (known as ANA-associated rheumatic diseases). The importance of ANA testing has been reinforced by the inclusion of ANA positivity as an entry criterion in the 2019 systemic lupus erythematosus classification criteria. In addition, specific ANAs (such as antibodies to Sm, double-stranded DNA (dsDNA), SSA/Ro60, U1RNP, topoisomerase I, centromere protein B (CENPB), RNA polymerase III and Jo1) are included in classification criteria for other rheumatic diseases. A number of techniques are available for detecting antibodies to a selection of clinically relevant antigens (such as indirect immunofluorescence and solid phase assays). In this Review, we discuss the advantages and limitations of these techniques, as well as the clinical relevance of the differences between the techniques, to provide guidance in understanding and interpreting ANA test results. Such understanding not only necessitates insight into the sensitivity and specificity of each assay, but also into the importance of the disease context and antibody level. We also highlight the value of titre-specific information (such as likelihood ratios).
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10
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Pisetsky DS, Lipsky PE. New insights into the role of antinuclear antibodies in systemic lupus erythematosus. Nat Rev Rheumatol 2020; 16:565-579. [PMID: 32884126 DOI: 10.1038/s41584-020-0480-7] [Citation(s) in RCA: 132] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2020] [Indexed: 01/05/2023]
Abstract
Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease characterized by antinuclear antibodies (ANAs) that form immune complexes that mediate pathogenesis by tissue deposition or cytokine induction. Some ANAs bind DNA or associated nucleosome proteins, whereas other ANAs bind protein components of complexes of RNA and RNA-binding proteins (RBPs). Levels of anti-DNA antibodies can fluctuate widely, unlike those of anti-RBP antibodies, which tend to be stable. Because anti-DNA antibody levels can reflect disease activity, repeat testing is common; by contrast, a single anti-RBP antibody determination is thought to suffice for clinical purposes. Experience from clinical trials of novel therapies has provided a new perspective on ANA expression during disease, as many patients with SLE are ANA negative at screening despite previously testing positive. Because trial results suggest that patients who are ANA negative might not respond to certain agents, screening strategies now involve ANA and anti-DNA antibody testing to identify patients with so-called 'active, autoantibody-positive SLE'. Evidence suggests that ANA responses can decrease over time because of the natural history of disease or the effects of therapy. Together, these findings suggest that, during established disease, more regular serological testing could illuminate changes relevant to pathogenesis and disease status.
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Affiliation(s)
- David S Pisetsky
- Departments of Medicine and Immunology, Duke University Medical Center and Medical Research Service, Veterans Administration Medical Center, Durham, NC, USA.
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11
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Pisetsky DS. Evolving story of autoantibodies in systemic lupus erythematosus. J Autoimmun 2020; 110:102356. [PMID: 31810857 PMCID: PMC8284812 DOI: 10.1016/j.jaut.2019.102356] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 11/01/2019] [Indexed: 01/02/2023]
Abstract
Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease characterized by antinuclear antibody (ANA) production. ANAs bind to DNA, RNA and complexes of proteins and nucleic acids and are important markers for diagnosis and activity. According to current models, ANAs originate from antigen-driven processes; nevertheless, antibody responses to both DNA and RNA binding proteins display features unexpected in terms of current paradigms for antigenicity. These differences may reflect disturbances in both B and T cells critical for autoreactivity. Clinically, ANA testing has new uses for determining classification as well as assessing eligibility for clinical trials. Studies of patients with established disease show frequent seronegativity. In this setting, seronegativity may indicate a stage of disease called post-autoimmunity in which the natural history of disease or effects of immunosuppressive therapies modifies responses. The new uses of ANA testing highlight the importance of understanding autoantigenicity and developing sensitive and informative assays for clinical assessments.
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Affiliation(s)
- David S Pisetsky
- Division of Rheumatology and Immunology, Duke University Medical Center and Medical Research Service, Durham Veterans Administration Medical Center, Durham, NC, USA.
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12
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Pisetsky DS, Spencer DM, Rovin B, Lipsky PE. Role of ANA testing in the classification of patients with systemic lupus erythematosus. Ann Rheum Dis 2019; 80:e124. [DOI: 10.1136/annrheumdis-2019-216259] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 09/06/2019] [Indexed: 12/29/2022]
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