Abstracts tagged "complement"

Abstract Number: 1733 • ACR Convergence 2022
Granzyme K Elicits a New Pathway for Complement Activation in RA Synovium
Anna Jonsson¹, Carlos Donado², Emma Gomez-Rivas¹ and Michael Brenner³, ¹Brigham and Women's Hospital, Boston, MA, ²Brigham and Women's Hospital and Harvard Medical School, Boston, MA, ³Brigham and Women's Hospital, Harvard Medical School, Boston, MA
Background/Purpose: T cells are major drivers of rheumatoid arthritis (RA) pathogenesis. Most research has focused on CD4 T cells, but we have found that CD8+…
Abstract Number: 2096 • ACR Convergence 2022
Role of Cell-Bound Complement Fragments as Biomarkers to Determine Disease Activity in Patients with Systemic Lupus Erythematosus
Marcela Muñoz Urbano¹, Diana C. Quintero-González¹, Mauricio Rojas², Joaquín Rodelo¹, Alba Luz León Álvarez¹, Luis Gonzalez¹ and Gloria Vásquez³, ¹Universidad de Antioquia, Medellín, Colombia, ²Grupo de Inmunología Celular e Inmunogenética, GICIG, and Unidad de citometría de flujo, Sede de Investigación Universitaria, Universidad de Antioquia, Medellín, Colombia, ³Grupo de Inmunología Celular e Inmunogenética, GICIG and Grupo de Reumatología, Universidad de Antioquía, Medellín, Colombia
Background/Purpose: The prompt identification of patients with systemic lupus erythematosus (SLE) at risk of or in flare strongly influences the prognosis of the disease. Cell-bound…
Abstract Number: 0144 • ACR Convergence 2022
The Association of Hypocomplementemia with Organ Involvement and Serum IgG4 in IgG4-related Disease
Guy Katz¹, Amelia S. Cogan¹, Grace McMahon¹, Sebastian Perez-Espina¹, Ana Fernandes¹, Cory Perugino¹, Zachary Wallace¹, John Atkinson², Alfred Kim² and John Stone³, ¹Massachusetts General Hospital, Boston, MA, ²Washington University School of Medicine, St. Louis, MO, ³Massachusetts General Hospital Rheumatology Unit, Harvard Medical School, Boston, MA
Background/Purpose: IgG4-related disease (IgG4-RD) is a systemic immune-mediated disease that can affect nearly every organ in the body. Hypocomplementemia is common in some patients with…
Abstract Number: 0317 • ACR Convergence 2022
Full Characterization of the Three Pathways of Complement System in Patients with Systemic Lupus Erythematosus: Relation to Disease Expression
Ivan Ferraz Amaro¹, maría García-González², carmen Ferrer-Moure², Fuensanta Gómez-Bernal², Antonia De Vera-González², Alejandra González Delgado², Agustín Francisco González-Rivero², Yolanda Fernández-Cladera², Juan Carlos Quevedo Abeledo³ and Federico Díaz-González⁴, ¹Division of Rheumatology. Hospital Universitario de Canarias. Spain., Santa Cruz de Tenerife, Spain, ²Hospital Universitario de Canarias, Santa Cruz de Tenerife, Spain, ³Hospital Universitario Dr. Negrín, Santa Cruz de Tenerife, Spain, ⁴Hospital Universitario de Canarias, Santa Cruz de Tenerife
Background/Purpose: Activation of the classical complement (C) pathway by immune complexes is a characteristic of patients with systemic lupus erythematosus (SLE). Accelerated consumption outstrips synthesis…
Abstract Number: 0524 • ACR Convergence 2022
A Randomized, Double-Blind, Phase II Study of Glucocorticoid Replacement by Vilobelimab, an Anti-C5a Monoclonal Antibody, in ANCA-Associated Vasculitis
Peter Merkel¹, Bernhard Hellmich², Anja Pfaff³, Carina Müller⁴, Elena Startseva³ and David Jayne⁵, ¹University of Pennsylvania, Philadelphia, PA, ²Klinik für Innere Medizin, Rheumatologie & Immunologie, Medius Kliniken, Universität Tübingen, Plochingen, Germany, ³InflaRx, Jena, Germany, ⁴Metronomia Clinical Research, Munich, Germany, ⁵University of Cambridge, Cambridge, United Kingdom
Background/Purpose: Induction of remission for severe ANCA-associated vasculitis [granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA)] utilizes rituximab (RTX) or cyclophosphamide (CYC) and tapering doses…
Abstract Number: 0565 • ACR Convergence 2022
Deciphering Complement System-dependent Cellular Pathways in Human Rheumatoid Arthritis Synovial Tissues Using Single-cell Computational Omics
Juan Vargas¹, Nirmal Banda², Ian Mantel³, Anna Jonsson⁴, Kevin Wei⁵, Deepak Rao⁴, Susan Goodman⁶, Kevin D Deane⁷, Jennifer Seifert⁸, Jennifer Anolik⁹, Michael Brenner¹⁰, Soumya Raychaudhuri⁴, Accelerating Medicines Partnership RA/SLE⁴, Michael Holers², Laura Donlin⁶ and Fan Zhang⁸, ¹School Public Health Biostatistics Department, Aurora, CO, ²Department of Medicine Division of Rheumatology, Aurora, CO, ³Weill Cornell Medicine, New York, NY, ⁴Brigham and Women's Hospital, Boston, MA, ⁵Brigham and Women's Hospital and Harvard Medical School, Boston, MA, ⁶Hospital for Special Surgery, New York, NY, ⁷University of Colorado Denver Anschutz Medical Campus, Denver, CO, ⁸University of Colorado, Aurora, CO, ⁹University of Rochester Medical Center, Rochester, NY, ¹⁰Brigham and Women's Hospital, Harvard Medical School, Boston, MA
Background/Purpose: The complement system is a major component of innate immunity and plays a vital role in experimental models of autoimmune arthritis pathogenesis. In patients…
Abstract Number: 0648 • ACR Convergence 2022
Pathogenic Anti-C1q Antibodies Potentiate Activation of the Classical Complement Pathway in a Subset of Lupus Nephritis Patients
Edmund Chang¹, Julian Low², Ellen Cahir-McFarland², Henk-Andre Kroon², Yaisa Andrews-Zwilling², Ted Yednock² and Ann Mongan², ¹Annexon Biosciences, Brisbane, CA, ²Annexon Biosciences, South San Francisco, CA
Background/Purpose: In LN, excess immune complexes lead to nephrotic deposition of C1q and C4d, the latter of which has been correlated with circulating C4d and…
Abstract Number: 0650 • ACR Convergence 2022
The Association of Urinary C9 to CD59 Ratio with Tubulointerstitial Fibrosis in Lupus Nephritis
Shudan Wang¹, Masako Suzuki², Daming Shao³, Muhammad Hamza Bukhari⁴, Brianna Lally⁵, Michael Belmont⁶, Jennifer Aguilan², Simone Sidoli², Anna Broder⁷ and J. Michelle Kahlenberg⁸, ¹Montefiore Medical Center / Albert Einstein College of Medicine, New York, NY, ²Albert Einstein College of Medicine, Bronx, NY, ³Albert Einstein College of Medicine/Jacobi Medical Center, Bronx, NY, ⁴Norwalk Hospital/Yale University, Norkwalk, VA, ⁵University of Wisconsin Hospitals and Clinics, Madison, WI, ⁶NYU Grossman School of Medicine, New York, NY, ⁷Hackensack University Medical Center, Hackensack, NJ, ⁸University of Michigan, Ann Arbor, MI
Background/Purpose: Animal and human studies suggest that terminal complement activation has a pathogenic role in tubulointerstitial fibrosis, which is a strong predictor of irreversible kidney…
Abstract Number: 0692 • ACR Convergence 2022
The Interplay Between Lipid Peroxidation and Neutrophil Extracellular Trap (NET) Formation in APS Pathogenesis
Naveen Kumar S K¹, Claire Hoy¹, Christine Rysenga¹, Srilakshmi Yalavarthi¹, Cyrus Sarosh², Sherwin Navaz¹, Jacqueline Madison¹, Jason S Knight³ and Yu (Ray) Zuo¹, ¹University of Michigan, Ann Arbor, MI, ²University of Michigan, Temperance, MI, ³University of Michigan, Division of Rheumatology, Ann Arbor, MI
Background/Purpose: Lipid peroxidation is the result of disrupted redox homeostasis and functions as a key component in various cell death programs. Neutrophil extracellular trap (NET)…
Abstract Number: L14 • ACR Convergence 2021
Effect of Avacopan, a Selective C5a Receptor Inhibitor, on Kidney Function in Patients with ANCA-Associated Vasculitis
David Jayne¹, Peter Merkel², Annette Bruchfeld³, Duvuru Geetha⁴, Alexandre Karras⁵, John Niles⁶ and Pirow Bekker⁷, ¹University of Cambridge, Cambridge, United Kingdom, ²University of Pennsylvania, Philadelphia, PA, ³Linköping University, Linköping, Sweden, ⁴Johns Hopkins University, Baltimore, MD, ⁵Hopital Europeen Georges Pompidou, Paris, France, ⁶Massachusetts General Hospital, Boston, MA, ⁷ChemoCentryx, Inc., San Carlos, CA
Background/Purpose: Anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis is a life- or organ-threatening condition in which patients experience severe inflammation of small blood vessels; renal disease is…
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…

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