Abstracts tagged "complement"

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: 1792 • ACR Convergence 2020
Platelet-bound C4d Is Associated with an Increased Risk of Arterial and Venous Thromboses in SLE
Yevgeniya Gartshteyn¹, Roberta Vezza Alexander², John Conklin³, Thierry Dervieux⁴ and Anca Askanase⁵, ¹Columbia University College of Physicians and Surgeons, Glen Rock, NJ, ²Exagen Inc, Vista, CA, ³Exagen Inc., Vista, CA, ⁴Prometheus Biosciences Inc, San Diego, CA, ⁵Columbia University College of Physicians and Surgeons, New York, NY
Background/Purpose: Platelet-bound complement activation products (PC4d), defined as PC4d20 net mean fluorescent intensity [MFI], or a thrombotic risk score that includes PC4d, C3 and anti-phosphatidylserine/prothrombin…
Abstract Number: 1797 • ACR Convergence 2020
A Multianalyte Assay Panel (MAP) with Algorithm Containing Cell-Bound Complement Activation Products (CB-CAPs) Is Superior to Anti-dsDNA and Low Serum Complement Levels in Predicting Transition of Probable Lupus to ACR Classified Lupus Within 2 Years
Rosalind Ramsey-Goldman¹, Roberta Vezza Alexander², Cristina Arriens³, Sonali Narain⁴, Elena Massarotti⁵, Daniel J Wallace⁶, Amit Saxena⁷, Christopher Collins⁸, Chaim Putterman⁹, Kenneth Kalunian¹⁰, Armida Sace², Rowena LaFon², JoAnne Ligayon², John Conklin¹¹ and Arthur Weinstein¹², ¹Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL, ²Exagen Inc, Vista, CA, ³Oklahoma Medical Research Foundation, Oklahoma City, OK, ⁴Northwell Health, Great Neck, NY, ⁵Brigham and Women's Hospital, Boston, MA, ⁶Cedars-Sinai Medical Center, Beverly Hills, CA, ⁷NYU School of Medicine, New York, ⁸MedStar Washington Hospital Center, Washington, DC, ⁹Albert Einstein College of Medicine, Bronx, NY, ¹⁰University of California San Diego, La Jolla, CA, ¹¹Exagen Inc., Vista, CA, ¹²Loma Linda University and Exagen, Inc, Claremont, CA
Background/Purpose: We reported previously (Ramsey-Goldman et al., Arthritis Rheumatol 2020) that score > 0.8 of a multianalyte assay panel (MAP) with algorithm predicts fulfillment of…
Abstract Number: 1801 • ACR Convergence 2020
An Engineered Extracellular Matrix‐rich Decellularized Substrate Based Podocytes Culture System to Study Intracellular Complement Production and Activation
Abhigyan Satyam¹, Maria Tsokos² and George Tsokos², ¹Division of Rheumatology & Clinical Immunology/Beth Israel Deaconess Medical Center/Harvard Medical School, boston, ²Division of Rheumatology & Clinical Immunology/Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA
Background/Purpose: Current technologies do not support long-term cell viability, differentiation and maintenance of podocytes. We developed a biophysical approach, termed macromolecular crowding (MMC), to create…
Abstract Number: 1802 • ACR Convergence 2020
Vitamin D Level: Predictor of SLE Disease Activity in AA Cohort with CLE?
Ileannette Robledo-Vega¹, John Scheinuk², Emmanuel Pardo², Ansley Pratt², Soham Mahato³, Andrew G. Chapple² and Myriam Guevara⁴, ¹Louisiana State University Health Sciences Center, New Orlenas, LA, ²Louisiana State University, New Orleans, LA, ³LSUHSC School of Public Health, New Orleans, LA, ⁴Lousiana State University Health Sciences Center, New Orleans, LA
Background/Purpose: There are few predominant African American (AA) epidemiological studies in Cutaneous Lupus Erythematosus (CLE). The Gilliam classification divides CLE into lupus specific, acute cutaneous…
Abstract Number: 1808 • ACR Convergence 2020
Erythrocyte Complement Receptor 1 (ECR1) and Erythrocyte Bound C4d (EC4d) Associate with Adverse Pregnancy Outcomes and Preeclampsia in Pregnant Women with Systemic Lupus Erythematosus (SLE)
Jill Buyon¹, John Conklin², Michael Golpanian¹, JoAnne Ligayon³, Thierry Dervieux⁴, Peter Izmirly¹, H. Michael Belmont¹, Jane Salmon⁵ and Roberta Vezza Alexander³, ¹New York University, New York, NY, ²Exagen Inc., Vista, CA, ³Exagen Inc, Vista, CA, ⁴Exagen Inc, San Diego, CA, ⁵Hospital for Special Surgery, New York, NY
Background/Purpose: Despite improvement in management and outcomes of pregnancies complicated by SLE, the risk of adverse events and preeclampsia (PE) continues to exceed that of…
Abstract Number: 1810 • ACR Convergence 2020
Complement Activation in Systemic Lupus Erythematosus Patients with Low Disease Activity Is Not Inhibited by Hydroxychloroquine
Anne Margrethe Troldborg¹, Annette Hansen², Kristian Stengaard-Pedersen² and Steffen Thiel², ¹Aarhus University Hospital, Arhus, Denmark, ²Aarhus University, Aarhus, Denmark
Background/Purpose: Mortality in patients with systemic lupus erythematosus (SLE) is significantly higher than in the general population. Treatment of SLE patients has improved, however, a…
Abstract Number: 1814 • ACR Convergence 2020
The Association of Urinary Membrane Attack Complex (C5b-9) with Proteinuria and Glomerular Activity in Lupus Nephritis
Shudan Wang¹, Erica Moore², Brianna Lally³, Beatrice Goilav⁴, Chaim Putterman³ and Anna Broder⁵, ¹Montefiore Medical Center / Albert Einstein College of Medicine, Bronx, NY, ²Albert Einstein College of Medicine, Bronx, ³Albert Einstein College of Medicine, Bronx, NY, ⁴The Children’s Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, ⁵Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY
Background/Purpose: Complement activation is known to play a major role in lupus nephritis (LN). Urinary membrane attack complex (C5b-9) has been shown to correlate with…
Abstract Number: 0064 • ACR Convergence 2020
Neutrophil Extracellular Traps Are Sufficient to Activate the Alternative Pathway of Complement
Rebecca Schriefer¹, Michelle Elvington², Priyan Weerappuli³ and Alfred Kim⁴, ¹Washington University School of Medicine, Saint Louis, MO, ²Kypha, Inc., Saint Louis, MO, ³University of Michigan, Ann Arbor, MI, ⁴Washington University School of Medicine, St. Louis, MO
Background/Purpose: Systemic lupus erythematosus (SLE) replies on complement activation to drive many of the pathophysiologic features of disease. We and others have noted that SLE…
Abstract Number: 2050 • ACR Convergence 2020
Autoantibodies Targeting Complement Receptors C3aR and C5aR1 Are Decreased in ANCA-associated Vasculitis and Correlate with a Higher Relapse Rate
Sebastian Klapa¹, Antje Müller², Andreas Koch³, Anja Kerstein-Staehle⁴, Wataru Kaehler³, Harald Heidecke⁵, Susanne Schinke⁶, Markus Huber-Lang⁷, Martin Nitschke⁸, Silke Pitann⁹, Christian Karsten¹⁰, Gabriela Riemekasten¹¹ and Peter Lamprecht², ¹University of Lübeck and Institute of Experimental Medicine, Christian-Albrechts-University of Kiel c/o German Naval Medical Institute, Department of Rheumatology and Clinical Immunology, Luebeck, Germany, ²University of Lübeck, Department of Rheumatology and Clinical Immunology, Lübeck, Germany, ³Institute of Experimental Immunology, Christian-Albrechts-University Kiel, c/o German Naval Medical Institute, Kronshagen, Germany, ⁴University of Lübeck, Dept Rheumatology and Clinical Immunology, Luebeck, Germany, ⁵CellTrend GmbH, Luckenwalde, Germany, ⁶University of Lübeck, Department of Rheumatology and Clinical Immunology, Luebeck, Germany, ⁷Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, Ulm, Germany, ⁸Department of Internal Medicine I, Transplant Center, University of Lübeck, Luebeck, Germany, ⁹University of Lübeck, Department of Rheumatology and Clinical Immunology,, Luebeck, Germany, ¹⁰Institute of Systemic Inflammation Research, University of Lübeck, Luebeck, Germany, ¹¹University of Lübeck, Department of Rheumatology and Clinical Immunology,, Lübeck, Germany
Background/Purpose: Activation of the alternative and common terminal complement pathways has been shown in ANCA-associated vasculitis (AAV). Circulating titers of the anaphylatoxin C5a are increased…

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