Abstracts tagged "complement"

Abstract Number: 0079 • ACR Convergence 2021
Association Between Preconception Complement Levels and Use of Hydroxychloroquine with Pregnancy Outcome in Patients with Primary Antiphospholipid Syndrome and Carriers of Antiphospholipid Antibodies: An International Multicenter Study
Daniele Lini¹, Cecilia Nalli², Laura Andreoli³, Francesca Crisafulli¹, Micaela Fredi¹, Maria Grazia Lazzaroni¹, Viktoria Bitsadze⁴, Antonia Calligaro⁵, Valentina Canti⁶, Roberto Caporali⁷, Francesco Carubbi⁸, Cecilia Chighizola⁹, Paola Conigliaro¹⁰, Fabrizio Conti¹¹, Caterina De Carolis¹², Teresa Del Ross⁵, Maria Favaro⁵, Maria Gerosa⁹, Annamaria Iuliano¹³, Jamilya Khizroeva⁴, Alexander Makatsariya⁴, Pier Luigi Meroni¹⁴, Marta Mosca¹⁵, Melissa Padovan¹⁶, Roberto Perricone¹⁰, Patrizia Rovere Querini⁶, Gian Domenico Sebastiani¹³, Chiara Tani¹⁷, Marta Tonello¹⁸, Simona Truglia¹¹, Dina Zucchi¹⁵, Franco Franceschini¹ and Angela Tincani¹⁹, ¹Rheumatology and Clinical Immunology Unit, ASST Spedali Civili and University of Brescia, Brescia, Italy, ²ASST SPEDALI CIVILI DI BRESCIA, Brescia, Italy, ³University of Brescia, Brescia, Italy, ⁴Department of Obstetrics and Gynecology, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russia, ⁵Rheumatology Unit, Department of Medicine, University of Padua, Padua, Italy, ⁶Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy, ⁷Policlinico S. Matteo University, Pavia, Italy, ⁸Department of Biotechnological and Applied Clinical Science, Rheumatology Unit, School of Medicine, University of L'Aquila, L'Aquila, Italy, ⁹University of Milan, Milan, Italy, ¹⁰Rheumatology, Allergology and Clinical Immunology, Department of "Medicina dei Sistemi", University of Rome Tor Vergata, Rome, Italy, ¹¹Lupus Clinic, Reumatologia, Dipartimento di Scienze Cliniche Internistiche, Anestesiologiche e Cardiovascolari, Sapienza Università di Roma, Rome, Italy, ¹²Polymedical Center for Prevention of Recurrent Spontaneous Abortion, Rome, Italy, ¹³Rheumatology Unit, Azienda Ospedaliera San Camillo-Forlanini, Rome, Italy, ¹⁴Division of Rheumatology, ASST.G Pini, Department of Clinical Sciences and Community Health, University of Milan and Istituto Auxologico Italiano, Milan, Italy, ¹⁵Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy, ¹⁶Rheumatology Unit, Department of Medical Sciences, University of Ferrara and Azienda Ospedaliero-Universitaria S. Anna, Ferrara, Italy, ¹⁷Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy, ¹⁸BSC, Rheumatology Unit, Department of Medicine, University of Padua, Padua, Italy, ¹⁹ASST Spedali Civili-University of Brescia, Gussago, Italy
Background/Purpose: APS is a rare autoimmune disease characterized by thrombotic events and/or pregnancy morbidities in the presence of confirmed positivity for aPL. Complement was demonstrated…
Abstract Number: 0325 • ACR Convergence 2021
A Multianalyte Assay Panel with Cell-bound Complement Activation Products Demonstrates Clinical Utility for the Diagnosis and Treatment of Systemic Lupus Erythematosus
Roberta Alexander¹, Scott Rey¹, John Conklin¹, Vinicius Domingues², Mansoor Ahmed³, Jazibeh Qureshi⁴ and Arthur Weinstein⁵, ¹Exagen Inc., Vista, CA, ²Florida State university, Daytona beach, FL, ³Arthritis Osteo Ctr of KY, Richmond, KY, ⁴Rheumatology Express, Catonsville, MD, ⁵Loma Linda University (Voluntary Position), Claremont, CA
Background/Purpose: The multianalyte assay panel (MAP) consists of cell-bound complement activation products (CB-CAPs) with lupus and non-lupus autoantibodies combined in an algorithm (Dervieux et al.,…
Abstract Number: 0336 • ACR Convergence 2021
The Incremental Clinical Utility of a Multianalyte Assay Panel with Cell-Bound Complement Activation Products versus a Traditional ANA Testing Strategy for the Diagnosis and Treatment of SLE
Tyler O'Malley¹, Fenglong Xie², yujie Su², cassie Clinton², Debra J. Zack¹, Jeffrey Curtis³ and John Wegener¹, ¹Exagen Inc., Vista, CA, ²University of Alabama at Birmingham, Birmingham, AL, ³Division of Clinical Immunology and Rheumatology, Department of Medicine, Department of Epidemiology, University of Alabama at Birmingham, Birmingham, AL
Background/Purpose: The comparative clinical utility of various diagnostic tests to aid the differential diagnosis of SLE is unclear. We compare the outcomes of testing with…
Abstract Number: 0346 • ACR Convergence 2021
The CB-CAPillaryTM Test Kit: A Tool for Point-of-Care Assays to Measure Cell-Bound Complement Activation Products
Joseph Ahearn¹, Susan Manzi¹ and Chau-Ching Liu², ¹Allegheny Health Network, Wexford, PA, ²Allegheny Health Network, Pittsburgh, PA
Background/Purpose: Cell-bound complement activation products (CB-CAPs) have been validated as biomarkers for systemic lupus erythematosus (SLE) diagnosis, monitoring and stratification, and for identification of patients…
Abstract Number: 0423 • ACR Convergence 2021
Urine and Plasma Complement Ba Levels During Flares of Nephritis in Patients with ANCA-Associated Vasculitis
Salem Almaani¹, Huijuan Song², Meshora Sthanithra², Christopher Toy², Anna Levesque², Lynn Fussner³, Alexa Meara³, Haikady Nagaraja², David Cuthbertson⁴, Nader Khalidi⁵, CURRY LEE MD KOENING⁶, Carol Langford⁷, Carol McAlear⁸, Larry Moreland⁹, Christian Pagnoux¹⁰, Philip Seo¹¹, Antoine Sreih¹², Kenneth Warrington¹³, Paul Monach¹⁴, Peter Merkel⁸, Brad Rovin³ and Dan Birmingham², ¹Ohio State University Medical Center, Columbus, OH, ²Ohio State university, Columbus, OH, ³Ohio State University Wexner Medical Center, Columbus, OH, ⁴University of South Florida, Tampa, FL, ⁵McMaster University, Hamilton, ON, Canada, ⁶LIMITED TO OFFICIAL UNIVERSITY DUTIES ONLY, Salt Lake City, UT, ⁷Cleveland Clinic, Moreland Hills, OH, ⁸University of Pennsylvania, Philadelphia, PA, ⁹University of Colorado, Denver, CO, ¹⁰Mount Sinai Hospital, Toronto, ON, Canada, ¹¹Johns Hopkins University, Baltimore, MD, ¹²Univeristy of Pennsylvania, Philadelphia, PA, ¹³Mayo Clinic, Rochester, Minnesota, ¹⁴Brigham and Women's Hospital, Boston, MA
Background/Purpose: The alternative complement pathway has been implicated in the pathogenesis of ANCA-associated vasculitis (AAV), however it is not clear whether activation of complement occurs…
Abstract Number: 0873 • ACR Convergence 2021
Clinical and Serological Characteristics of Latin American Patients with Lupus Enteritis: A Case-Control Study
Marcela Muñoz-Urbano¹, Julian Sanchez-Bautista², Yeison Santamaria-Alza¹, Diana C. Quintero-González³, Andres Ramirez², Adriana Lucía Vanegas-García⁴, Gloria M. Vasquez¹ and Luis Alonso Gonzalez³, ¹Rheumatology section, Universidad de Antioquia, Medellín, Colombia, ²Department of internal medicine, Universidad de Antioquia, Medellín, Colombia, ³Division of rheumatology, Universidad de Antioquia, Medellín, Colombia, ⁴Division of rheumatology, Universidad de Antioquia – Hospital San Vicente Fundación, Medellín, Colombia
Background/Purpose: Lupus enteritis (LE) is a potentially life-threatening manifestation of systemic lupus erythematosus (SLE), with an incidence ranging from 8% to 27%. Timely diagnosis is…
Abstract Number: 0955 • ACR Convergence 2021
The Effect of Treatment with the Complement C5a Receptor Inhibitor Avacopan on Health-Related Quality of Life in ANCA-Associated Vasculitis
Vibeke Strand¹, Pirow Bekker², Huibin Yue², David R.W. Jayne³ and Peter Merkel⁴, ¹Stanford University School of Medicine, Portola Valley, CA, ²ChemoCentryx, San Carlos, CA, ³University of Cambridge, Cambridge, United Kingdom, ⁴University of Pennsylvania, Philadelphia, PA
Background/Purpose: Avacopan, an oral C5a receptor inhibitor, was evaluated in ANCA-associated vasculitis (AAV). Efficacy and safety results were reported previously. Health-related quality of life (HRQoL)…
Abstract Number: 1086 • ACR Convergence 2021
Lack of Effect of SARS-CoV-2 Vaccination on Cell Bound Complement Activation Products (CB-CAPs), Multianalyte Assay Panel (MAP) with Algorithm, and Inflammatory Biomarkers
Mark Rudolph, Anja Kammensheidt and Roberta Alexander, Exagen Inc., Vista, CA
Background/Purpose: SARS-CoV-2 infection can lead to severe inflammation including increased complement activation (Ma, Kulkarni 2021) and the production of several proinflammatory cytokines. The rapid deployment…
Abstract Number: 1370 • ACR Convergence 2021
Complement Factor D and Factor H Represent Disease and Severity Biomarkers for Systemic Sclerosis Associated Pulmonary Arterial Hypertension (SSc-PAH)
Roberta G Marangoni¹, Changyong Feng¹, Ashley Frazer-Abel², Stephen Tomlinson³, Amy Wielgosz¹, Katie Lutz⁴, Michael Pauciulo⁴, William Nichols⁴, V. Michael Holers⁵, Christopher Ritchlin⁶, R James White III¹ and Benjamin Korman¹, ¹University of Rochester, Rochester, NY, ²University of Colorado Denver, Colorado, CO, ³Medical University of South Carolina, Charleston, SC, ⁴Cincinnati Children's Hospital Medical Center, Cincinnati, OH, ⁵University of Colorado, Denver, CO, ⁶Division of Allergy, Immunology, and Rheumatology, School of Medicine and Dentistry, University of Rochester Medical Center, Rochester, NY
Background/Purpose: Pulmonary arterial hypertension (PAH) is a severe vascular complication of systemic sclerosis (SSc) and a major cause of mortality. Despite significant advances in the…
Abstract Number: 1371 • ACR Convergence 2021
Symptom Management in Systemic Sclerosis: A Pilot Study of a Web-based Intervention Using Peer-Health Coaches
Susan Murphy¹, Yen Chen², Mary Alore², Sheri Hicks² and Dinesh Khanna², ¹University of Michigan, Grosse Ile, MI, ²University of Michigan, Ann Arbor, MI
Background/Purpose: People with systemic sclerosis (SSc) have a high burden of chronic symptoms that have dramatic effects on function and quality of life. Fatigue, along…
Abstract Number: 1493 • ACR Convergence 2021
Association of the Soluble Terminal Complement Complex C5b-9 (sC5b-9) with Urinary Signs of Kidney Disease in a Swiss SLE Cohort
Kristin Schmiedeberg¹, Ruediger B. Mueller², Thomas Neumann³, Ian Pirker¹, Philipp Rein⁴, Camillo Ribi⁵, Andrea Rubbert-Roth⁶, Michael Kirschfink⁷, Jutta Schroeder-Braunstein⁷, Reinhard Voll⁸ and Johannes von Kempis¹, ¹Kantonsspital St. Gallen, St.Gallen, Switzerland, ²Clinic of Rheumatology, Medical University Hospital Aarau, Aarau, Switzerland, ³Kantonsspital St.Gallen, St.Gallen, Switzerland, ⁴Landeskrankenhaus Hohenems, Wolfurt, Austria, ⁵CHUV, Lausanne, Switzerland, ⁶Kantonspital St Gallen, St.Gallen, Switzerland, ⁷Universitätsklinikum Heidelberg, Heidelberg, Germany, ⁸Department of Rheumatology and Clinical Immunology, University Medical Center, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Freiburg, Germany
Background/Purpose: Few reliable laboratory biomarkers exist to determine disease activity in SLE. The role of the soluble terminal complement complex, sC5b-9, in active SLE has…
Abstract Number: 1504 • ACR Convergence 2021
Association Between Anti-RNP Antibodies and Interferon Gene Expression but Not Complement Consumption in SLE
Erika Hubbard¹, David Pisetsky² and Peter Lipsky¹, ¹AMPEL BioSolutions, Charlottesville, VA, ²Duke University Medical Center, Durham, NC
Background/Purpose: Anti-nuclear antibodies are important serologic features of SLE and facilitate diagnosis. Anti-double stranded DNA (dsDNA) antibodies are routinely monitored for disease prognosis and are…
Abstract Number: 0085 • ACR Convergence 2020
Classifications of Inflammatory Myopathies: Differentially Expressed Membrane-Bound Complement Regulators Allow Specific Patterns of Membrane Attack Complex Deposition
Fadi Charouf¹, Netanel Karbian¹, Itamar Altman¹, Yakov Fellig¹ and Dror Mevorach¹, ¹Hadassah-University Hospital, Jerusalem, Yerushalayim, Israel
Background/Purpose: Idiopathic inflammatory myopathies (IIM) are a group of heterogeneous disorders that typically present with proximal muscle weakness. According to the classification criteria, IMs are…
Abstract Number: 0262 • ACR Convergence 2020
SLE Pregnancies: C4 as Predictor of Flares and Adverse Pregnancy Outcomes
Francesca Crisafulli¹, Laura Andreoli¹, Matteo Filippini¹, Micaela Fredi¹, Maria Chiara Gerardi¹, Roberto Gorla², Maria Grazia Lazzaroni¹, Daniele Lini¹, Cecilia Nalli², Marco Taglietti¹, Andrea Lojacono³, Sonia Zatti³, Cristina Zanardini³, Franco Franceschini¹ and Angela Tincani¹, ¹Rheumatology and Clinical Immunology Unit, Spedali Civili and University of Brescia, Brescia, Lombardia, Italy, ²Rheumatology and Clinical Immunology Unit, ASST Spedali Civili of Brescia, Brescia, Lombardia, Italy, ³Obstetrics and Gynecology Unit, Spedali Civili and University of Brescia, Brescia, Lombardia, Italy
Background/Purpose: SLE pregnancies have an increased risk of Adverse Pregnancy Outcomes (APO). In clinical practice, low C3 and C4 levels are associated with active disease…
Abstract Number: 0528 • ACR Convergence 2020
The Complex Relationship Between C4b Binding Protein, Warfarin and Antiphospholipid Antibodies
Giorgia Grosso¹, Kerstin Sandholm², Aleksandra Antovic¹, Iva Gunnarsson¹, Agneta Zickert¹, Anna Vikerfors³, Lennart Truedsson⁴, Maria Bruzelius¹, Bo Nilsson⁵, Kristina Nilsson Ekdahl⁵ and Elisabet Svenungsson¹, ¹Karolinska University Hospital, Stockholm, Sweden, ²Linnaeus Center for Biomaterials Chemistry, Linnaeus University, Kalmar, Sweden, ³Swedish Medical Products Agency, Uppsala, Sweden, ⁴Lunds University, Lund, Sweden, ⁵Uppsala University, Uppsala, Sweden
Background/Purpose: C4b Binding Protein (C4BP) is the main inhibitor of the classical complement pathway. Both β2glycoprotein-I (β2GPI), the main antigen in the antiphospholipid syndrome (APS),…

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