Abstracts tagged "complement"

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…
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),…
Abstract Number: 0938 • ACR Convergence 2020
Low Preconceptional Complement Level Is Related with an Adverse Obstetric Outcome in a Multicentric Cohort of Pregnancy in Patients with APS and aPL Positivity
Cecilia Nalli¹, Daniele Lini², Laura Andreoli², Francesca Crisafulli², Micaela Fredi², Maria Grazia Lazzaroni², Victoria Bitsadze³, Antonia Calligaro⁴, Valentina Canti⁵, Roberto Caporali⁶, Francesco Carubbi⁷, Cecilia Chighizola⁸, Paola Conigliaro⁹, Caterina De Carolis¹⁰, Teresa Del Ross⁴, Maria Favaro⁴, Maria Gerosa¹¹, Annamaria Iuliano¹², Jamilya Khizroeva³, Alexander Makatsariya³, Pierlugi Meroni¹³, Marta Mosca¹⁴, Melissa Padovan¹⁵, Roberto Perricone⁹, Patrizia Rovere-Querini¹⁶, Gian Domenico Sebastiani¹², Chiara Tani¹⁴, Marta Tonello⁴, Dina Zucchi¹⁴, Franco Franceschini¹⁷ and Angela Tincani², ¹Rheumatology and Clinical Immunology Unit, ASST Spedali Civili of Brescia, Brescia, Lombardia, Italy, ²Rheumatology and Clinical Immunology Unit, Spedali Civili and University of Brescia, Brescia, Lombardia, Italy, ³Department of Obstetrics and Gynecology of I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), Moscow, Russia, ⁴Rheumatology Unit, Department of Medicine, University Hospital of Padua, Padua, Italy, ⁵Immunology, Rheumatology, Allergology and Rare Disease-IRCCS San Raffaele Hospital, Laboratory of Autoimmunity and vascular inflammation San Raffaele, Milan, Italy, ⁶Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy, ⁷Department of Biotechnological and Applied Clinical Science, Rheumatology Unit, School of Medicine, University of L'Aquila, L'Aquila, Italy, ⁸Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy; Experimental Laboratory of Immunorheumatological Researches, Istituto Auxologico Italiano, Milan, Italy, ⁹Rheumatology, Allergology and Clinical Immunology, Department of "Medicina dei Sistemi", University of Rome Tor Vergata, Rome, Italy, ¹⁰Polymedical Center for Prevention of Recurrent Spontaneous Abortion, Rome, Italy, ¹¹Division of Rheumatology, Department of Clinical Sciences and Community Health, Ospedale Gaetano Pini, University of Milan, Milan, Italy, ¹²Rheumatology Unit, Azienda Ospedaliera San Camillo-Forlanini, Rome, Italy, ¹³Division of Rheumatology, ASST.G Pini, Department of Clinical Sciences and Community Health, University of Milan and Istituto Auxologico Italiano, Milan, Italy, ¹⁴Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy, ¹⁵UO e Sezione di Reumatologia, Dipartimento di Scienze Mediche, Universita' degli Studi di Ferrara, Ferrara, Italy, ¹⁶Unit of Immunology, Rheumatology, Allergy and Rare Diseases, Università Vita-Salute San Raffaele - IRCCS Ospedale San Raffaele, Milan, Italy, ¹⁷Rheumatology and Clinical Immunology, Spedali Civili and University of Brescia, Brescia, Italy
Background/Purpose: The role of complement in the aPL related pathology has been widely studied in animal models. aPL can induce fetal loss in experimental animals but…
Abstract Number: 642 • 2019 ACR/ARP Annual Meeting
Complement Deposition C4d on Platelets Is Associated with Vascular Events in Systemic Lupus Erythematosus
Elisabet Svenungsson ¹, Johanna Gustavsson ², Giorgia Grosso ², Iva Gunnarsson ², Bo Nilsson ³, Anders Larsson ³, Anders Bengtsson ⁴ and Christian Lood⁵, ¹Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden, ²Karolinska Institutet, Stockholm, Sweden, ³Uppsala University, Uppsala, Sweden, ⁴Lund University, Lund, Sweden, ⁵University of Washington, Seattle
Background/Purpose: Complement components, including C4d, can be detected on the surface of activated platelets and they have been associated with vascular disease in systemic lupus…
Abstract Number: 669 • 2019 ACR/ARP Annual Meeting
Complement Activation in Probable Systemic Lupus Erythematosus (pSLE) May Predict Progression to SLE Defined by Fulfillment of ACR Classification Criteria
Rosalind Ramsey-Goldman¹, Roberta Alexander ², Sonali Narain ³, Cristina Arriens ⁴, Elena Massarotti ⁵, Daniel Wallace ⁶, Amit Saxena ⁷, Christopher Collins ⁸, Chaim Putterman ⁹, Kenneth Kalunian ¹⁰, Tyler O'Malley ¹¹, Armida Sace ², Rowena LaFon ², Jo-Anne Ligayon ², Claudia Ibarra ², John Conklin ², Thierry Dervieux ² and Arthur Weinstein ¹², ¹Northwestern University, Chicago, IL, ²Exagen, Vista, CA, ³Northwell Health, Great Neck, Long Island, NY, ⁴Oklahoma Medical Research Foundation, University of Oklahoma Health Sciences Center, Oklahoma City, OK, ⁵Brigham and Women's Hospital/Harvard Medical School, Boston, MA, ⁶Cedars Sinai Medical Center/UCLA, Los Angeles, CA, ⁷New York University School of Medicine, New York, NY, ⁸MedStar Washington Hospital Center, Department of Rheumatology, Washington, DC, ⁹Albert Einstein College of Medicine, New York, NY, ¹⁰Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, ¹¹Exagen, Oceanside, CA, ¹²Georgetown University & Exagen, Inc, Claremont, CA
Background/Purpose: We reported (Ramsey-Goldman et al., Arthritis Rheumatol 2018: 70 [suppl 10]) that cell-bound complement activation products (CB-CAPs) and a multi-analyte assay panel with algorithm…
Abstract Number: 686 • 2019 ACR/ARP Annual Meeting
Association Between the Soluble Terminal Complement Complex C5b-9 (sC5b-9) and Signs of Active Kidney Disease in a Swiss SLE Cohort
Kristin Schmiedeberg ¹, Ruediger B. Mueller ², Thomas Neumann ¹, Ian Pirker ¹, Philipp Rein ³, Camillo Ribi ⁴, Andrea Rubbert-Roth ⁵, Michael Kirschfink ⁶, Reinhard Voll ⁷ and Johannes von Kempis¹, ¹Division of Rheumatology and Immunolog, Kantonsspital St. Gallen, St. Gallen, Sankt Gallen, Switzerland, ²Clinic of Rheumatology, Medical University Hospital Aarau, Aarau, Aargau, Switzerland, ³Division of Rheumatology and Immunolog, Kantonsspital St. Gallen, St.Gallen, Sankt Gallen, Switzerland, ⁴Service of Immunology and Allergy, Lausanne University Hospital and University of Lausanne, Lausanne, Vaud, Switzerland, ⁵Division of Rheumatology, Kantonsspital St. Gallen, St. Gallen, Sankt Gallen, Switzerland, ⁶Institute of Immunology, University of Heidelberg, Heidelberg, Germany, ⁷Division of Rheumatology and Clinical Immunology, Medical Centre - University of Freiburg, Freiburg, Germany
Background/Purpose: There is a lack of reliable biomarkers for disease activity in SLE. While C3a, an anaphylatoxin generated during of complement activation, could be predictive…
Abstract Number: 1266 • 2019 ACR/ARP Annual Meeting
AGBL3 as a Novel Gene Associated with Hereditary Hypocomplementemic Urticarial Vasculitis and Favorable Response to Rituximab
Ahmet Gul¹, Nesllihan Abaci ² and Sema Sirma-Ekmekci ², ¹Department of Internal Medicine, Division of Rheumatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey, Istanbul, Turkey, ²Department of Genetics, Istanbul University Institute for Experimental Medical Research, Istanbul, Turkey, Istanbul, Turkey
Background/Purpose: Urticarial skin lesions are well-known features of autoinflammatory disorders associated with NLRP3 and NLRP12 variants. However hereditary forms of hypocomplementemic urticarial vasculitis (HUV) with…
Abstract Number: 1825 • 2019 ACR/ARP Annual Meeting
Comparison of the Thrombosis Risk Score with Triple Positivity in SLE Thrombosis
Michelle Petri¹, Jessica Li ¹, John Conklin ², Tyler O'Malley ³, Jo-Anne Ligayon ², Leilani Wolover ² and Thierry Dervieux ², ¹Johns Hopkins University School of Medicine, Baltimore, MD, ²Exagen, Vista, CA, ³Exagen, Oceanside, CA
Background/Purpose: We previously developed a Thrombosis Risk Score, a sum of three factors: lupus anticoagulant (by RVVT confirm); low C3; and C4d bound to platelets.…
Abstract Number: 2887 • 2019 ACR/ARP Annual Meeting
Cell-bound Complement Activation Products in Combination with Low Complement C3 or C4 Have Superior Diagnostic Performance in Systemic Lupus Erythematosus
Sonali Narain¹, Daniel Wallace ², Chaim Putterman ³, Cristina Arriens ⁴, Anca Askanase ⁵, Kenneth Kalunian ⁶, Christopher Collins ⁷, Amit Saxena ⁸, Elena Massarotti ⁹, Roberta Alexander ¹⁰, Claudia Ibarra ¹⁰, Tyler O'Malley ¹¹, John Conklin ¹⁰, Rosalind Ramsey-Goldman ¹², Joseph Ahearn ¹³, Susan Manzi ¹³, Arthur Weinstein ¹⁰ and Thierry Dervieux ¹⁰, ¹Northwell Health, Great Neck, Long Island, NY, ²Cedars Sinai Medical Center/UCLA, Los Angeles, CA, ³Albert Einstein College of Medicine, New York, NY, ⁴Oklahoma Medical Research Foundation, University of Oklahoma Health Sciences Center, Oklahoma City, OK, ⁵Columbia University, New York, ⁶Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, ⁷MedStar Washington Hospital Center, Department of Rheumatology, Washington, DC, ⁸New York University School of Medicine, New York, NY, ⁹Brigham and Women's Hospital/Harvard Medical School, Boston, MA, ¹⁰Exagen, Vista, CA, ¹¹Exagen, Oceanside, CA, ¹²Northwestern University, Chicago, IL, ¹³Allegheny Health Network, Pittsburgh
Background/Purpose: Cell-bound complement activation products (CB-CAPs) are stable forms of classical complement activation ex-vivo, with high sensitivity and specificity for systemic lupus erythematosus (SLE). We…
Abstract Number: 931 • 2018 ACR/ARHP Annual Meeting
Patients with Seropositive Rheumatoid Arthritis Who Do Not Mount a CRP Response When They Have Synovitis Are Immunologically Distinct and Are Poorly Served By Current Management Strategies
Thomas McDonnell¹, Claire Bradford², Divya Raj³, Coziana Ciurtin⁴, Elizabeth Jury² and Jessica Manson⁵, ¹Rayne Institute, University College London, London, United Kingdom, ²Division of Medicine, Centre for Rheumatology Research, University College London, London, United Kingdom, ³Rheumatology, University College London Hospitals NHS Trust, London, United Kingdom, ⁴University College London, London, United Kingdom, ⁵University College London Hospitals NHS Trust, London, United Kingdom
Background/Purpose: An atypical subgroup of patients with seropositive rheumatoid arthritis (RA) has been identified with confirmed synovitis but normal levels of the acute phase protein…

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