Abstracts tagged "Biomarkers"

Abstract Number: 0840 • ACR Convergence 2025
Shared and Distinct Urinary Proteomic Signatures of Lupus Nephritis and Other Glomerular Diseases
Alessandra Ida Celia¹, Daksh Saksena², CHEN-YU LEE³, Carla Guthridge⁴, Wade DeJager⁵, Rufei Lu⁴, Judith James⁴, Jill Buyon⁶, Michelle Petri⁷, Joel Guthridge⁴, Brad Rovin⁸ and Andrea Fava³, ¹Sapienza University of Rome, Rome, Italy, ²Johns Hopkins University, Baltimore, ³Johns Hopkins University, Baltimore, MD, ⁴Oklahoma Medical Research Foundation, Oklahoma City, OK, ⁵Oklahoma Medical Research Foundation, Oklahoma City, ⁶NYU Grossman School of Medicine, New York, NY, ⁷Johns Hopkins University School of Medicine, Timonium, MD, ⁸The Ohio State University, Columbus, OH
Background/Purpose: Urine collects the byproducts of kidney biology and has emerged as a valuable, noninvasive source of molecular information that reflects intrarenal pathology. In lupus…
Abstract Number: 0508 • ACR Convergence 2025
Serum immune complexes assessed using a cell-reporter assay are associated with serum IFN-alpha levels, disease activity and the risk of incident lymphoma in the ASSESS prospective cohort
Clementine Pouenat¹, Marine Vierling², Chiara Meier³, Ludivine Robin⁴, Philippe Kolb⁵, Hartmut Hengel⁶, Gaetane Nocturne⁷, Divi Cornec⁸, Valerie Devauchelle⁹, Véronique Le Guern¹⁰, Claire larroche¹¹, Damien Sène¹², Marion Couderc¹³, Eric HACHULLA¹⁴, Philippe Dieude¹⁵, Olivier Vittecoq¹⁶, Jacques Morel¹⁷, Nicolas Meyer¹⁸, Raphaele Seror¹⁹, Reinhard Voll²⁰, Pierre-Marie Duret²¹, Laurent Miguet²², Xavier Mariette²³ and Jacques-eric GOTTENBERG²⁴, ¹IBMC, UPR ³⁵⁷², STRASBOURG, France, ²Strasbourg University Hospital, Department of Public Health, GMRC, Strasbourg, France,, Strasbourg, Alsace, France, ³Strasbourg University Hospital, Department ofRheumatology, STRASBOURG, France, ⁴Strasbourg University Hospital, Department of pathology, ⁴CNRS, Immunopathologie et Chimie Thérapeutique/Laboratory of Excellence Medalis, Institut de Biologie Moléculaire et Cellulaire (IBMC), Strasbourg, France Strasbourg, France;, Strasbourg, Alsace, France, ⁵INSTITUTE OF VIROLOGY Medical Center, Freiburg, Freiburg, Germany, ⁶INSTITUTE OF VIROLOGY University Hospital Freiburg, FREIBURG, Germany, ⁷University Paris Saclay, Le Kremlin Bicetre, Ile-de-France, France, ⁸LBAI, UMR¹²²⁷, University of Brest, CHU Brest, Brest, France, Brest, Bretagne, France, ⁹UBO, Brest, France, ¹⁰Cochin hospital, Paris, France, ¹¹Service de Médecine Interne, Hôpital Avicenne APHP, Bobigny, Paris, Ile-de-France, France, ¹²Department of Internal Medicine, Lariboisière University Hospital, Université Paris Cité, Assistance Publique Hôpitaux de Paris, Paris, Ile-de-France, France, ¹³Service de Rhumatologie CHU Clermont-Ferrand, Clermont-Ferrand, ¹⁴CHU Lille, Département de Médecine Interne et Immunologie Clinique, Centre de Référence des Maladies Auto-Immunes et Auto-Inflammatoires Rares du Nord, Nord-Ouest, Méditerranée et Guadeloupe (CeRAINOM), Lille, France, Lille, France, ¹⁵Service de Rhumatologie, Hôpital Bichat APHP, Paris, Paris, Ile-de-France, France, ¹⁶Service de Rhumatologie & CIC-CRB ¹⁴⁰⁴, CHU de Rouen, Université de Rouen, Rouen, Rouen, France, ¹⁷CHU and University of Montpellier, Montpellier, France, ¹⁸Strasbourg University Hospital, Department of Public Health, GMRC, Strasbourg, France, Strasbourg, Alsace, France, ¹⁹Department of Rheumatology, National referral center for auto immune disease and Sjogren disease, Université Paris-Saclay, INSERM UMR¹¹⁸⁴: Centre for Immunology of Viral Infections and Autoimmune Diseases, Assistance Publique-Hôpitaux de Paris, Hôpital Bicêtre, Le Kremlin Bicêtre, Paris, France., le kremlin bicetre, France, ²⁰University Medical Center Freiburg, Freiburg, Germany, ²¹Colmar General Hospital; Strasbourg University Hospital, Strasbourg, France, ²²Haemtology, Strasbourg University Hospital, IBMC UPR ³⁵⁷², Strasbourg, France, ²³Université Paris-Saclay, Le Kremlin Bicetre, France, ²⁴Hautepierre Hospital, STRASBOURG, Alsace, France
Background/Purpose: Fc‐gamma receptor (FcγR) activation by soluble IgG immune complexes (sICs) is considered to play a pivotal pathogenic role in B-cell-mediated autoimmune diseases, such as…
Abstract Number: 0299 • ACR Convergence 2025
Interpreting Myositis Autoantibody Line-Blot Immunoassays in Real-World Settings: Implications for Diagnostic Accuracy for Inflammatory Myopathies
pei-Hsinq lai¹, TING-YUAN LAN², Chiao-Feng Cheng³, Tai-Ju Lee⁴, Ting-Wei Chang⁵, Jui-Hung Kao⁶, Kuan-Yen Lin⁷, Cheng-Hsun Lu⁸, Chiehyu Shen⁹, Ko-Jen Li⁸ and Song-Chou Hsieh¹⁰, ¹Taipei City Hospital, Taichung, Taiwan, ²National Taiwan University Hospital Hsinchu Branch, Hsinchu City, Taiwan, ³National Taiwan University Hospital, Taipei City, Taiwan (Republic of China), ⁴National Taiwan University Hospital Hsinchu Branch, Hsinchu City, Taiwan (Republic of China), ⁵National Taiwan University Hospital Hsinchu Branch, Taichung, Taiwan, ⁶Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan, Taipei, Taiwan (Republic of China), ⁷National Taiwan University Hospital, Hsin-Chu Branch, Hsin-Chu City, Taiwan (Republic of China), ⁸National Taiwan University Hospital, Taipei, Taiwan, ⁹National Taiwan University Hospital, Taipei city, Taiwan, ¹⁰National Taiwan Unuversity Hospital, Taipei City, Taiwan (Republic of China)
Background/Purpose: Idiopathic inflammatory myopathies (IIM) present with diverse clinical features and disease courses. The myositis autoantibody line blot immunoassay (LIA) has advanced IIM diagnostics and…
Abstract Number: 1510 • ACR Convergence 2025
Biomarker landscape for neuropsychiatric involvement in patient with systemic lupus erythematosus
Sitian Zang¹, Ranran Yao² and Zhanguo Li³, ¹Department of Rheumatology and Immunology, Peking University People’s Hospital, Beijing, China (People's Republic), ²Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China (People's Republic), ³Department of Rheumatology and Immunology, Peking University People's Hospital, Beijing, China, Beijing, Beijing, China (People's Republic)
Background/Purpose: Systemic lupus erythematosus (SLE) is a multifactorial autoimmune disease result in substantial organs or systems damage or even fatal. The estimated number of global…
Abstract Number: L11 • ACR Convergence 2024
Rheumatology Diagnostics Utilizing Artificial Intelligence (ANA Reader©) for ANA Pattern Identification and Titer Quantification
May Choi¹, Farbod Moghaddam¹, Mohammad Sajadi¹, Ann E. Clarke¹, Sasha Bernatsky², Karen Costenbader³, Irene Chen⁴, Murray Urowitz⁵, John Hanly⁶, Caroline Gordon⁷, Sang-Cheol Bae⁸, Juanita Romero-Diaz⁹, Jorge Sanchez-Guerrero¹⁰, Daniel Wallace¹¹, David Isenberg¹², Anisur Rahman¹³, Joan Merrill¹⁴, Paul Fortin¹⁵, Dafna Gladman¹⁶, Ian Bruce¹⁷, Michelle Petri¹⁸, Ellen Ginzler¹⁹, Mary Anne Dooley²⁰, Rosalind Ramsey-Goldman²¹, Susan Manzi²², Andreas Jönsen²³, Graciela Alarcón²⁴, Ronald Van Vollenhoven²⁵, Cynthia Aranow²⁶, Meggan Mackay²⁶, Guillermo Ruiz-Irastorza²⁷, S. Sam Lim²⁸, Murat Inanç²⁹, Kenneth Kalunian³⁰, Soren Jacobsen³¹, Christine Peschken³², Diane Kamen³³, Anca Askanase³⁴, Marvin Fritzler³⁵ and Mina Aminghafari¹, ¹University of Calgary, Calgary, AB, Canada, ²Research Institute of the McGill University Health Centre, Montreal, QC, Canada, ³Brigham and Women's Hospital/Harvard Medical School, Boston, MA, ⁴UC Berkeley and UCSF, Berkeley, CA, ⁵Self employed, Toronto, ON, Canada, ⁶Dalhousie University, Halifax, NS, Canada, ⁷University of Birmingham, Birmingham, United Kingdom, ⁸Hanyang University Medical Center, Seoul, South Korea, ⁹The National Institute of Medical Sciences and Nutrition, Mexico City, Mexico, ¹⁰Krembil Research Institute, Toronto, ON, Canada, ¹¹Cedars Sinai Medical Center, Studio City, CA, ¹²Department of Ageing, Rheumatology and Regenerative Medicine, Division of Medicine, University College London, London, United Kingdom, ¹³University College London, London, United Kingdom, ¹⁴Oklahoma Medical Research Foundation, Oklahoma City, OK, ¹⁵Centre ARThrite - CHU de Québec - UniversitéLaval, Quebec, QC, Canada, ¹⁶University of Toronto, Toronto Western Hospital, Toronto, ON, Canada, ¹⁷Queen's University Belfast, Belfast, United Kingdom, ¹⁸Johns Hopkins University School of Medicine, Baltimore, MD, ¹⁹SUNY Downstate Health Sciences University, New York, NY, ²⁰UNC physician network, Chapel Hill, NC, ²¹Northwestern University, Chicago, IL, ²²Allegheny Health Network, Pittsburgh, PA, ²³Lund University, Lund, Sweden, ²⁴The University of Alabama at Birmingham, Oakland, CA, ²⁵Amsterdam UMC, Amsterdam, Netherlands, ²⁶Feinstein Institutes for Medical Research, New York, NY, ²⁷Biobizkaia Health Research Institute, Bilbao, Spain, ²⁸Emory University, Atlanta, GA, ²⁹Istanbul University, Istanbul, Turkey, ³⁰UC San Diego, La Jolla, CA, ³¹Rigshospitalet, Copenhagen, Denmark, ³²University of Manitoba, Winnipeg, MB, Canada, ³³Medical University of South Carolina, Johns Island, SC, ³⁴Columbia University Medical Center, New York, NY, ³⁵Mitogen Diagnostics Corp, Calgary, AB, Canada
Background/Purpose: Antinuclear antibody (ANA) immunofluorescence (IFA) patterns and titers are a key part of rheumatology diagnostics, however, there is considerable intra- and inter-laboratory variability with…
Abstract Number: 0319 • ACR Convergence 2024
Sporadic Inclusion Body Myositis Novel Autoantibody and Biomarker Research Utilizing Proteome Microarray and Mass Spectrometry Proteomics Analysis
Farbod Moghaddam¹, Mark Tarnopolsky², Valérie Leclair³, marie Hudson³, Ross Mitchell⁴, Katherine Buhler¹, Erin Hatcher⁵, Meifeng Zhang¹, Antoine Dufour¹, Luiz de Almeida¹, Marvin Fritzler⁶ and May Choi¹, ¹University of Calgary, Calgary, AB, Canada, ²McMaster University, Hamilton, ON, Canada, ³McGill University, Montreal, QC, Canada, ⁴University of Alberta, Edmonton, Canada, ⁵McMaster University, Hamilton, Canada, ⁶Mitogen Diagnostics Corp, Calgary, AB, Canada
Background/Purpose: Sporadic inclusion body myositis (sIBM) is often challenging to diagnose because many patients have no known biomarkers (seronegative). Machine learning was applied to identify…
Abstract Number: 0491 • ACR Convergence 2024
Small Molecule Metabolites, Potential Disease-specific Biomarkers for Predicting Treatment Response in Rheumatoid Arthritis
Jiayi Xu¹, Yi Zhao², Chenxi Zhu³, Yi Liu⁴, Tao Chen¹, Rui Sun³, Huifang Hu⁵, Zhen Zhou¹ and Yan Liu¹, ¹Department of Rheumatology and Immunology, West China Hospital,Sichuan University, Chengdu, Sichuan, China, Cheng du, China (People's Republic), ²Department of Rheumatology and Immunology, West China Hospital,Sichuan University, Chengdu, Sichuan, China, Sichuan, China (People's Republic), ³Department of Rheumatology and Immunology, West China Hospital,Sichuan University, Chengdu, Sichuan, China, chengdu, China (People's Republic), ⁴Department of Rheumatology and Immunology, West China Hospital,Sichuan University, Chengdu, Sichuan, China, chengdu, ⁵Department of Rheumatology and Immunology, West China Hospital,Sichuan University, Chengdu, Sichuan, China, Chengdu, Sichuan, China (People's Republic)
Background/Purpose: Rheumatoid arthritis (RA) is a complex chronic inflammatory condition primarily affecting joints, presenting a challenge in understanding its causes, varied subtypes, diagnostic indicators, and…
Abstract Number: 0636 • ACR Convergence 2024
Evaluation of Clinical, Histological and Biomarker Response After Induction Treatment of Lupus Nephritis (LN)
Danielle Egypto¹, Edgard Reis Neto², Guilherme Carlesso³, Luis Andrade⁴, Luiz Moura³, Debora Calderaro⁵ and Emília Sato⁶, and Emília Inoue Sato; Edgar Torres dos Reis Neto., ¹Federal University of Paraiba, JOÃO PESSOA, Paraiba, Brazil, ²Division of Rheumatology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal, São Paulo, SP, Brazil, ³Federal University of São Paulo, São Paulo, SP, Brazil, ⁴Division of Rheumatology, Department of Medicine, Escola Paulista de Medicina, Federal University of São Paulo, São Paulo, SP, Brazil, ⁵Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil, ⁶Universidade Federal de Sao Paulo, São Paulo, SP, Brazil

Background/Purpose: LN occurrs in 50 to 75 percent of SLE patients and is associated with a significant morbimortality. LN presents distinct severity, with frequent flares…
Abstract Number: 0738 • ACR Convergence 2024
Quantitative Vascular US Has Additional Diagnostic and Prognostic Value in GCA
Colm Kirby¹, Rachael Flood¹, Sharon Cowley², Emma Finlay³, Ronan Mullan¹, Grainne Murphy⁴ and David Kane⁵, ¹Tallaght University Hospital, DUBLIN, Dublin, Ireland, ²Tallaght University Hospital, Dublin, Dublin, Dublin, Ireland, ³School of Biotechnology, Dublin City University, Dublin, Ireland, ⁴Cork University Hospital, Cork, Ireland, ⁵Tallaght University Hospital & Trinity College Dublin, D24, Ireland
Background/Purpose: Vascular Ultrasound (VUS) performs well in diagnosing Giant Cell Arteritis (GCA) but its role in monitoring disease activity and in predicting outcomes is unknown…
Abstract Number: 0871 • ACR Convergence 2024
Disease-associated Central Nervous System Activation Predicts Good Clinical Response to Tumor Necrosis Factor Inhibition in Rheumatoid Arthritis Patients – “The PreCePRA Study”
Juergen Rech¹, Prof. Dr. Andreas Hess², Koray Tascilar¹, Dr. Hannah Schenker³, verena schönau¹, Marina Sergeeva², Jutta Prade², Silke Kreitz², Mageshva Sulvakumar², Laura Konerth², Sandra Strobelt², Matthias Englbrecht⁴, Prof. Dr. Dr. Axel Hueber⁵, Eugen Feist⁶, Prof. Dr. Mario Zaiss¹, Gerd Burmester⁷, Frank Behrens⁸, Dr. Michaela Koehm⁹, Prof. Dr. Christoph Baerwald¹⁰, Dr. Stephanie Finzel¹¹, Dr. Arnd Kleyer¹², Prof. Dr. Reinhard Voll¹¹, Dr. Julie Roesch¹³, Prof. Dr. Arnd Doerfler¹³, Prof. Dr. Nemanja Damjanov¹⁴, Prof. José António P. Da Silva¹⁵ and Georg Schett¹⁶, ¹Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, Deutsches Zentrum für Immuntherapie (DZI), Friedrich Alexander University Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ²Institute for Experimental Pharmacology FAU Erlangen-Nürnberg, Erlangen, Germany, ³Department of Internal Medicine 3 - Rheumatology and Immunology, Department of Internal Medicine 1 - Gastroenterology, Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, Deutsches Zentrum für Immuntherapie (DZI), Friedrich Alexander University Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ⁴Freelance Healthcare Data Scientist, Eckental, ⁵Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, + Rheumatologie, Klinik für Innere Medizin 5, Klinikum Nürnberg Nord, Prof.-Ernst-Nathan-Str. 1, 90419, Nürnberg, Deutschland, Erlangen, Germany, ⁶Department of Rheumatology, Helios Clinic Vogelsang-Gommern, cooperation partner of the Otto von Guericke University Magdeburg, Gommern, Germany, ⁷Department of Rheumatology and Clinical Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany, ⁸University Hospital Goethe University Frankfurt and Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Frankfurt, Germany, ⁹Goethe-University & Fraunhofer ITMP, Frankfurt, Germany, ¹⁰Medizinische Klinik III - Bereich Rheumatologie, Liebigstraße 20, 04103 Leipzig, Leipzig, Germany, ¹¹Universitätsklinikum Freiburg, Klinik für Rheumatologie und Klinische Immunologie, Hugstetterstraße 55, 79106 Freiburg, Freiburg, Germany, ¹²Department of Internal Medicine 3 - Rheumatology and Immunology, Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, Deutsches Zentrum für Immuntherapie (DZI), Friedrich Alexander University Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany; Charité - Universitätsmedizin Berlin Med. Klinik mit Schwerpunkt Rheumatologie und Klinische Immunologie Berlin, Erlangen, Germany, ¹³Department of Neuroradiology, Friedrich - Alexander - Universitaet Erlangen - Nuernberg and Universitaetsklinikum Erlangen , Erlangen , Germany, Erlangen, Germany, ¹⁴Belgrade University School of Medicine, Institute Institute of Rheumatology, Belgrade, Belgrade, Serbia, ¹⁵Head of Department Reumatologia. Hospitais da Universidade (SRHUC), Coimbra, Portugal, ¹⁶Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
Background/Purpose: Rheumatoid arthritis (RA) is an chronic inflammatory disease that is frequently treated with tumor necrosis factor inhibitors (TNFi). Little is known about predictors of…
Abstract Number: 1121 • ACR Convergence 2024
A Phase 1, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Safety, Pharmacokinetics and Pharmacodynamics of Single and Multiple Ascending Doses of AMG 329, a Monoclonal Antibody, in Conventional and Plasmacytoid Dendritic Cell-Mediated Rheumatic Diseases
Alan Kivitz¹, Stanley Cohen², Annie Lau-Kilby³, Yajing Sun³, Jiayin Huang³, Atasi Jana³, Susie Kim³, Yanping Wu³, Quinnie Yang³ and Lin Zhao³, ¹Altoona Center for Clinical Research, Duncansville, PA, ²Metroplex Clinical Research Center, dallas, TX, ³Amgen Inc., Thousand Oaks, CA
Background/Purpose: AMG 329 (formerly HZN-1116), a human monoclonal antibody (mAb), binds to soluble and membrane-bound human feline McDonough sarcoma (FMS)-like tyrosine kinase 3 receptor ligand…
Abstract Number: 1359 • ACR Convergence 2024
Association of Coronary Artery Calcium Score and Growth Differentiation Factor 15 in Rheumatoid Arthritis
Jessica Roldan Ortega¹, Francisco Castillo-Castellon², Evelyn Aranda Cano³, Luz Angelica Viruel-Mejia⁴, Itzel Palafox Sosa⁵, David Vera Bustamante⁶, Fausto Sánchez Muñoz², ⁠Yaneli Juárez-Vicuña⁷, Luis H. Silveira Torre⁸ and Laura Aline Martinez-Martinez⁹, ¹Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de México, Mexico, ²Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico, ³Instituto Nacional de Cardiología Ignacio Chávez, Ciudad de Mexico, Mexico, ⁴Rheumatology Departement at National Institute of Cardiology Ignacio Chavez - Universidad Autonoma del Estado de Hidalgo, Tula de Allende, Hidalgo, Mexico, ⁵Escuela Superior de Medicina-Instituto Politecnico Nacional, Ciudad de México, Mexico, ⁶Benemerita Universidad Autonoma de Puebla, Heroica Puebla de Zaragoza, Puebla, Mexico, ⁷Instituto Nacional de Cardiología Ignacio Chávez, Departamento de Inmunología, Investigador en Ciencias Médicas C, Mexico City, Mexico, ⁸Department of Rheumatology , Instituto Nacional de Cardiología Ignacio Chávez., Mexico City, Mexico, ⁹Rheumatology Department - National Institute of Cardiology Ignacio Chavez, Mexico City, Distrito Federal, Mexico
Background/Purpose: Cardiovascular diseases are the leading cause of death in RA patients [Gravallese EM, Firestein GS. N Engl J Med. 2023;388:529-42]. However, risk calculation has…
Abstract Number: 1642 • ACR Convergence 2024
A Urinary Biomarker Panel to Predict the Probability of Histologically Active Lupus Nephritis
Andrea Fava¹, Andrew Concoff², Tyler O'Malley³, Sepehr Taghavi⁴, Touba Warsi⁴, Sudha Kumar⁴, Christine Schleif⁴ and Michelle Petri⁵, ¹Divison of Rheumatology, Johns Hopkins University, Baltimore, MD, ²Exagen, Inc., Los Angeles, CA, ³Exagen, Vista, CA, ⁴Exagen, Carlsbad, CA, ⁵Johns Hopkins University School of Medicine, Timonium, MD
Background/Purpose: Achieving an NIH Activity Index of < 2 upon treatment is associated with less LN flare and thus better long-term kidney survival. Here, we…
Abstract Number: 1849 • ACR Convergence 2024
Selective Targeting of One-Carbon Metabolism to Combat Rheumatoid Arthritis
Theodora Manolakou¹, Sanjaykumar Boddul¹, George Sentis², Michail Angelos Panagias¹, Martina Samiotaki³, Dionysis Nikolopoulos¹, Ana Slipicevic¹, Kumar Sanjiv¹, Martin Henriksson¹, Oliver Mortusewicz¹, Aikaterini Chatzidionysiou¹, Per-Johan Jakobsson¹ and Thomas Helleday¹, ¹Karolinska Institutet, Stockholm, Sweden, ²Biomedical Reseearch Foundation Academy of Athens, Athens, Greece, ³Alexander Fleming Biomedical Sciences Research Center, Athens, Greece
Background/Purpose: Rapidly proliferating cells fuel their increased nucleotide demand by boosting one-carbon metabolism, associated with the survival of pathogenic proliferative cells and the release of…
Abstract Number: 2233 • ACR Convergence 2024
Maximizing Diagnostic Sensitivity: Combined Anti-RA33, Anti-CarP, and Anti-PAD4 Autoantibodies in Seronegative Rheumatoid Arthritis
Andrew Concoff¹, Touba Warsi², Sepehr Taghavi², Sudha Kumar², Abigail Patalinghug², Christine Schleif², Brittany Partain³, Joseph Ahearn⁴, Susan Manzi⁵, Michael Mahler⁶, Veena Joy⁷ and Tyler O'Malley⁸, ¹Exagen, Inc., Los Angeles, CA, ²Exagen, Carlsbad, CA, ³Exagen, Boston, MA, ⁴Allegheny Health Network, Wexford, PA, ⁵Allegheny Health Network, Pittsburgh, PA, ⁶Werfen, San Diego, CA, ⁷ThermoFisher, Philadelphia, PA, ⁸Exagen, Vista, CA
Background/Purpose: Studies have found autoantibodies (Ab) directed against heterogeneous nuclear ribonucleoprotein A2/B1 (anti-RA33), peptidyl arginine deiminase 4 (anti-PAD4) and carbamylated proteins (anti-CarP) each have diagnostic…

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