Abstracts tagged "complement"

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: 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: 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: 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: 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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