Abstracts tagged "complement"

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: 1510 • ACR Convergence 2020
Platelet-bound C4d Is Associated with Platelet Activation and Arterial Thrombotic Events
Yevgeniya Gartshteyn¹, Adam Mor², Daichi Shimbo², Leila Khalili³, Teja Kapoor⁴, Laura Geraldino-Pardilla⁵, Roberta Vezza Alexander⁶, Thierry Dervieux⁷ and Anca Askanase², ¹Columbia University College of Physicians and Surgeons, Glen Rock, NJ, ²Columbia University College of Physicians and Surgeons, New York, NY, ³Columbia University Medical Center, New Haven, CT, ⁴Columbia University College of Physicians and Surgeons, Leonia, NJ, ⁵Division of Rheumatology, Columbia University Vagelos College of Physicians and Surgeons, New York, ⁶Exagen Inc, Vista, CA, ⁷Prometheus Biosciences Inc, Irvine, CA
Background/Purpose: Platelets have a well-defined role in arterial thrombosis, and platelet-bound complement activation products (PC4d) correlate with vascular thromboses in patients with Systemic Lupus Erythematosus…
Abstract Number: 1636 • ACR Convergence 2020
8 Years Follow-Up of a Novel Autoinflammatory Disease: CD59 Malfunction Causes Hemolytic Anemia, Recurrent Guillain-Barre Syndrome, and Strokes in Pediatric Populations and Respond Well to Eculizumab and Pozelimab
Dror Mevorach¹ and Netanel Karbian¹, ¹Hadassah-University Hospital, Jerusalem, Yerushalayim, Israel
Background/Purpose: In 2013 we have described the first patients with a novel autoinflammatory disease manifested in 4 children with recurrent Guillain-Barre syndrome and hemolytic anemia…
Abstract Number: 1670 • ACR Convergence 2020
Low Copy Number of Long C4 Genes Is a Genetic Risk Factor for Childhood Onset SLE (cSLE) but Is Associated with Higher Age of Disease Onset
Fatima Barbar-Smiley¹, Danlei Zhou², Joanne Drew², Bi Zhou², Cagri Yildirim-Toruner², Vidya Sivaraman³, Wael Jarjour⁴, Stacy Ardoin² and Chack-Yung Yu⁵, ¹Nationwide Children's Hospital/The Ohio State University, Columbus, OH, ²Nationwide Children's Hospital, Columbus, OH, ³Nationwide Children's Hospital, Bexley, OH, ⁴The Ohio State University, Columbus, OH, ⁵Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH
Background/Purpose: Hypocomplementemia is a marked feature of systemic lupus erythematosus (SLE), which may be a result of consumption initiated by immune complexes between self-nuclear antigens…
Abstract Number: 1791 • ACR Convergence 2020
Renal Tubular Complement C9 Deposition Is Associated with Renal Tubular Damage and Fibrosis in Lupus Nephritis
Shudan Wang¹, Ming Wu², Luis Chiriboga², Beatrice Goilav³, Shuwei Wang⁴, Chaim Putterman⁵, Daniel Schwartz⁶, James Pullman⁶, Anna Broder⁷ and H. Michael Belmont⁸, ¹Montefiore Medical Center / Albert Einstein College of Medicine, Bronx, NY, ²NYU Langone Health, New York, ³The Children’s Hospital at Montefiore, Albert Einstein College of Medicine, Bronx, NY, ⁴Morristown Medical Center, Morristown, NJ, ⁵Albert Einstein College of Medicine, Bronx, NY, ⁶Montefiore Medical Center, Bronx, NY, ⁷Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, ⁸New York University, New York, NY
Background/Purpose: Tubulointerstitial damage in lupus nephritis (LN) is a strong predictor of progression to chronic kidney disease (CKD) and end stage renal disease (ESRD). While…
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: 2030 • 2018 ACR/ARHP Annual Meeting
Patients with Childhood-Onset SLE (cSLE) and Hypertension Have Consistently Higher Serum Concentrations of C3 and C4 Than Those without Hypertension
Evan Mulvihill¹, Stacy P. Ardoin², Susan D Thompson³, Bi Zhou⁴, Gakit Yu⁵, Nora G. Singer⁶, Deborah M. Levy⁷, Hermine I. Brunner⁸, Yee Ling Wu⁹, Haikady Nagaraja¹⁰, Laura E. Schanberg¹¹ and Chack-Yung Yu², ¹Pediatrics and Rheumatology, Nationwide Children's Hospital, Columbus, OH, ²Division of Rheumatology, Nationwide Children’s Hospital, Columbus, OH, ³Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, ⁴Center for Molecular and Human Genetics, The Research Institute at Nationwide Children's Hospital and The Ohio State University, Columbus, OH, ⁵Center for Molecular and Human Genetics, Nationwide Children's Hospital, Columbus, OH, ⁶Departments of Medicine and Pediatrics, Division of Rheumatology, MetroHealth Medical Center, Cleveland, OH, Cleveland, OH, ⁷Rheumatology, Hospital for Sick Children, Toronto, ON, Canada, ⁸Pediatric Rheumatology Collaborative Study Group (PRCSG), Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, ⁹Department of Microbiology and Immunology, Loyola University Chicago, Chicago, IL, ¹⁰College of Public Health, The Ohio State University, Columbus, OH, ¹¹Duke University Medical Center, Durham, NC
Background/Purpose: Chronic systemic inflammation, mediated in part by complement, and inadequate vascular repair mechanisms affect patients with cSLE from a young age and are associated…

All abstracts accepted to ACR Convergence are under media embargo once the ACR has notified presenters of their abstract’s acceptance. They may be presented at other meetings or published as manuscripts after this time but should not be discussed in non-scholarly venues or outlets. The following embargo policies are strictly enforced by the ACR.

Accepted abstracts are made available to the public online in advance of the meeting and are published in a special online supplement of our scientific journal, Arthritis & Rheumatology. Information contained in those abstracts may not be released until the abstracts appear online. In an exception to the media embargo, academic institutions, private organizations, and companies with products whose value may be influenced by information contained in an abstract may issue a press release to coincide with the availability of an ACR abstract on the ACR website. However, the ACR continues to require that information that goes beyond that contained in the abstract (e.g., discussion of the abstract done as part of editorial news coverage) is under media embargo until 10:00 AM ET on November 14, 2024. Journalists with access to embargoed information cannot release articles or editorial news coverage before this time. Editorial news coverage is considered original articles/videos developed by employed journalists to report facts, commentary, and subject matter expert quotes in a narrative form using a variety of sources (e.g., research, announcements, press releases, events, etc.).

Violation of this policy may result in the abstract being withdrawn from the meeting and other measures deemed appropriate. Authors are responsible for notifying colleagues, institutions, communications firms, and all other stakeholders related to the development or promotion of the abstract about this policy. If you have questions about the ACR abstract embargo policy, please contact ACR abstracts staff at [email protected].