Abstracts tagged "neutrophils"

Abstract Number: 0537 • ACR Convergence 2022
Neutrophil Extracellular Traps as a Biomarker to Predict Outcomes in Lupus Nephritis
Laura Patricia Whittall Garcia¹, Farnoosh Naderinavi¹, Zahi Touma², Dafna Gladman³, Murray Urowitz⁴, Anna Konvalinka¹ and Joan Wither⁵, ¹University Health Network, Toronto, ON, Canada, ²Schroeder Arthritis Institute, Krembil Research Institute, University Health Network and University of Toronto, Toronto, ON, Canada, ³Toronto Western Hospital, Schroeder Arthritis Institute, Toronto, ON, Canada, ⁴University of Toronto, University Health Network, Schroeder Arthritis Institute, Toronto, ON, Canada, ⁵Schroeder Arthritis Institute, Krembil Research Institute, University Health Network, University of Toronto, Toronto, ON, Canada
Background/Purpose: Neutrophil Extracellular Traps (NETs) have been implicated in Lupus Nephritis (LN) pathogenesis. SLE neutrophils release High Mobility Group Box-1 (HMGB1) protein, in turn, HMGB1…
Abstract Number: 1684 • ACR Convergence 2022
A Potent Inhibitor of PAD4 Suppresses Histone Citrullination in Vitro and in Vivo
Gundula Min-Oo, Victor Lira, Debbie Ruelas, Upasana Mehra, Graham Pimm, Taylor Won, Jean-Philippe Belzile, Kelly Wang, Claire Ellis, Blake Bleier, Paqui Gonzalez Traves, Nikolai Novikov, Adam Schrier and Anita Niedziela-Majka, Gilead Sciences, Foster City, CA
Background/Purpose: Peptidyl arginine deaminase 4 (PAD4) catalyzes the conversion of arginine residues to citrulline, a post-translational modification that has been implicated in the auto-immune response…
Abstract Number: 0567 • ACR Convergence 2022
Gain-of-Function Mutations in Lyn Kinase Cause a Novel Autoinflammatory Disease with Small Vessel Vasculitis and Liver Fibrosis
Adriana Almeida de Jesus¹, Guibin Chen², Dan Yang², Tomas Brdicka³, Natasha Ruth⁴, David Bennin⁵, Dita Cebecauerova⁶, Hana Malcova⁷, Helen Freeman⁸, Neil Martin⁹, Karel Svojgr⁶, Murray Passo⁴, Farzana Bhuyan¹⁰, Sara Alehashemi¹¹, Andre Rastegar¹², Kat Uss¹², Lela Kardova¹², Iris Duric³, Ebun Omoyinmi¹³, Petra Peldova⁶, Chyi-Chia Richard Lee¹⁴, David Kleiner¹⁴, Colleen Hadigan¹⁵, Stephen Hewitt¹⁴, Stefania Pittaluga¹⁴, Carmelo Carmona-Rivera¹⁶, Katherine R. Calvo¹⁵, Nirali Shah¹⁴, Miroslava Balascakova⁶, Danielle Fink¹⁷, Radana Kotalova⁶, Zuzana Parackova⁶, Lucie Peterkova⁶, Daniela Kuzilkova⁶, Vit Campr⁶, Lucie Sramkova⁶, Stephen Brooks¹⁶, Eric Meffre¹⁸, Rebecca Harper², Hyesun Kuehn¹⁵, Mariana Kaplan¹⁶, Paul Brogan¹⁹, Sergio Rosenzweig¹⁵, Zuoming Deng¹⁶, Anna Huttenlocher⁵, Susan Moir¹², Douglas Kuhns¹⁷, Manfred Boehm², Karolina Skvarova Kramarzova²⁰ and Raphaela Goldbach-Mansky²¹, ¹NIAID, NIH, Silver Spring, MD, ²National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, ³Laboratory of Leukocyte Signaling, Institute of Molecular Genetics of the Academy of Sciences of Czech Republic (ASCR), Prague, Czech Republic, ⁴Medical University of South Carolina, Charleston, SC, ⁵Departments of Pediatrics and Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, ⁶Second Faculty of Medicine, Charles University/University Hospital Motol, Prague, Czech Republic, ⁷Second Faculty of Medicine, Charles University/University Hospital Motol, Praha, Czech Republic, ⁸Raigmore Hospital, Inverness, Scotland, United Kingdom, ⁹Royal Hospital for Children, Glasgow, Scotland, United Kingdom, ¹⁰National Institutes of Health, Bethesda, MD, ¹¹NIH/NIAID/TADS, Clarksville, MD, ¹²National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, ¹³Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom, ¹⁴National Cancer Institute, National Institutes of Health, Bethesda, MD, ¹⁵Clinical Center, National Institutes of Health, Bethesda, MD, ¹⁶National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, ¹⁷National Institute of Allergy and Infectious Diseases, National Institutes of Health, Frederick, MD, ¹⁸Yale University, New Haven, CT, ¹⁹UCL Institute of Child Health and Great Ormond Street Hospital NHS Foundation Trust, London, United Kingdom, ²⁰Second Faculty of Medicine, Charles University/University Hospital Motol, Prague, ²¹NIH/NIAID, Potomac, MD
Background/Purpose: Lyn kinase is a member of the Src family of tyrosine kinases that regulates innate and adaptive immune responses. Lyn C-terminal tail tyrosine residue,…
Abstract Number: 1687 • ACR Convergence 2022
A Core Inflammation Program Conserved Across Human and Murine Neutrophils
Nicolaj hackert¹, Felix Radtke¹, Tarik Exner¹, Carsten Müller-Tidow¹, Hanns-Martin Lorenz¹, Peter Nigrovic², Guido Wabnitz¹ and Ricardo Grieshaber-Bouyer¹, ¹Heidelberg University Hospital, Heidelberg, Germany, ²Boston Children's Hospital, Boston, MA
Background/Purpose: Neutrophils mediate a range of homeostatic and inflammatory processes and display substantial phenotypic and functional heterogeneity. While animal models enable important mechanistic discoveries, differences…
Abstract Number: 0593 • ACR Convergence 2022
A New Cytokine Interleukin 40 Is Elevated in the Serum of Patients with Early Rheumatoid Arthritis and Associates with Autoantibodies and Neutrophil Activation
Adéla Navrátilová¹, Viktor Bečvář¹, Hana Hulejová¹, Michal Tomcik², Heřman Mann², Olga Růžičková¹, Olga Šléglová³, Jakub Závada¹, Karel Pavelka⁴, Jiří Vencovský⁵, Ladislav Šenolt⁵ and Lucie Andrés Cerezo¹, ¹Institute of Rheumatology, Prague, Czech Republic, ²Institute of Rheumatology, Department of Rheumatology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic, Prague, Czech Republic, ³Institute of Rheumatology, Prague, ⁴Institute of Rheumatology, Department of Rheumatology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic, Praha, Czech Republic, ⁵Institute of Rheumatology and Department of Rheumatology, First Faculty of Medicine, Charles University, Prague, Czech Republic
Background/Purpose: IL-40 is a newly described cytokine related to malignant transformation and immune system function. In our previous study, we showed that IL-40 is elevated…
Abstract Number: 1688 • ACR Convergence 2022
Biomechanical Phenotype of Circulating Neutrophils Is Altered in ANCA Associated Vasculitis
Noelle Pisacano¹, Stephen P. McAdoo¹, Jochen Guck², Charles D. Pusey¹, Edwin R. Chilvers¹, Andrew S. Cowburn¹, Katharine M. Lodge¹ and Maria F. Prendecki¹, ¹Imperial College London, London, United Kingdom, ²Max Planck Institute, Erlangen, Germany
Background/Purpose: Real Time-Deformability Cytometry (RT-DC) is a novel technique able to identify morpho-rheological characteristics of individual cells such as size, deformability, and elasticity using only…
Abstract Number: 0596 • ACR Convergence 2022
Neutrophil Extracellular Traps (NET) Trigger an Enhanced Pro-inflammatory Response in Macrophage Subpopulations in Rheumatoid Arthritis Patients via the Aryl Hydrocarbon Receptor (AhR) Pathway
Dyhia Melbouci¹, Sarra Seninet¹, Marie-Christophe Boissier², Elodie Segura³ and Patrice Decker¹, ¹University Sorbonne Paris Nord, Inserm UMR 1125, Li2P, Bobigny, France, ²INSERM UMR 1125, Sorbonne Paris Nord University,Rheumatology Dpt, APHP, GHUPSSD, Avicenne Hosp, Bobigny, France, ³U932 Inserm, Curie Institute, Paris, France
Background/Purpose: Activated neutrophils (PMN) form neutrophil extracellular traps (NET), fibers of DNA and associated proteins expelled in the extracellular space. Increased NET formation has been…
Abstract Number: 1689 • ACR Convergence 2022
Oral Ginger Supplementation Counteracts NETosis in Autoimmune Mouse Models and in Healthy Humans
Ramadan Ali¹, Miela Zahavi², Christine Rysenga¹, Cyrus Sarosh³, Claire Hoy¹, Kristen Demoruelle⁴ and Jason S Knight⁵, ¹University of Michigan, Ann Arbor, MI, ²Universtiy of Michigan, Ann Arbor, MI, ³University of Michigan, Temperance, MI, ⁴University of Colorado Anschutz Medical Campus, Aurora, CO, ⁵University of Michigan, Division of Rheumatology, Ann Arbor, MI
Background/Purpose: It has previously been reported that 6-gingerol, the most abundant phytochemical in ginger root, inhibits neutrophil phosphodiesterase activity and thereby counteracts neutrophil hyperactivity in…
Abstract Number: 0611 • ACR Convergence 2022
Proteomics Reveals Dysregulated Molecular Mechanisms of Cell Death in Neutrophils in Rheumatoid Arthritis
Jennifer Amsler¹, Constance Beaudouin², Morgane LeGall³, Géraldine Falgarone⁴, François Rannou⁵, Léa Tourneur³ and Véronique Witko-Sarsat³, ¹Institute Cochin, Schoenenwerd, Switzerland, ²Hôpital Privé de Provence, Aix-en-Provence, France, ³Institute Cochin, Paris, France, ⁴Hôpital Avicenne, Paris, France, ⁵Hôpital Cochin, Paris, France
Background/Purpose: Favoring apoptosis of neutrophils infiltrating the joints of patients suffering from rheumatoid arthritis (RA) and perpetuating inflammation has recently been discussed as an alternative…
Abstract Number: 1694 • ACR Convergence 2022
Skin Exposure to UV Light Triggers Podocyte and Distal Tubular Injury, in the Presence of CD177+ Neutrophil Cell Cluster
Angelique Cortez¹, Lindsay Mendyka¹, Fred Kolling² and Sladjana Skopelja-Gardner¹, ¹Dartmouth Hitchcock Medical Center, Lebanon, NH, ²Geisel School of Medicine at Dartmouth, Lebanon, NH
Background/Purpose: Sensitivity to ultraviolet (UV) light affects ~ 80% of systemic lupus erythematosus (SLE) patients. UV light exposure of lupus skin leads to local and…
Abstract Number: 0687 • ACR Convergence 2022
DNA- and NET-Binding Beta-2 Glycoprotein I in a Large Cohort of Antiphospholipid Antibody-Positive Patients
Katarina Kmetova¹, Srilakshmi Yalavarthi², Claire Hoy², Cyrus Sarosh³, Noah Peters², Tristin Smith², Sherwin Navaz², Yu Zuo² and Jason S Knight⁴, ¹Division of Rheumatology, University of Michigan, Ann Arbor, MI, ²University of Michigan, Ann Arbor, MI, ³University of Michigan, Temperance, MI, ⁴University of Michigan, Division of Rheumatology, Ann Arbor, MI
Background/Purpose: Beta-2 glycoprotein I (β2GPI) is an abundant plasma protein and a critically important autoantigen in APS. While β2GPI has been reported to have antioxidant,…
Abstract Number: 1714 • ACR Convergence 2022
The Circadian Clock Gene Bmal1 Negatively Regulates Autoantibody Production in SLE
Shuichiro Nakabo¹, Donavon Sandoval-Heglund¹, Victoria Hoffmann², Mingzeng Zhang¹, Norio Hanata¹, Zerai Manna¹, Elaine Poncio¹, Sarfaraz Hasni³ and Mariana Kaplan⁴, ¹NIAMS/NIH, Bethesda, MD, ²ORS/ORF/NIH, Bethesda, MD, ³National Institutes of Health, Bethesda, MD, ⁴National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD
Background/Purpose: Systemic lupus erythematosus (SLE) is a systemic autoimmune disease that affects multiple organs including kidney and skin. While its etiology and pathogenesis are still…
Abstract Number: 0688 • ACR Convergence 2022
Antibodies of the IgA Isotype Target Neutrophil Extracellular Traps in APS
Sherwin Navaz¹, Lyndsay Kluge¹, Katarina Kmetova², Bruna Jacintho³, Srilakshmi Yalavarthi¹, Claire Hoy¹, Cyrus Sarosh⁴, Noah Peters¹, Tristin Smith¹, Gabriel Figueroa Parra⁵, Jacqueline Madison¹, Kristen Demoruelle⁶, Ali Duarte-Garcia⁵, Jason S Knight⁷ and Yu (Ray) Zuo¹, ¹University of Michigan, Ann Arbor, MI, ²Division of Rheumatology, University of Michigan, Ann Arbor, MI, ³University of Michigan, São Paulo, Brazil, ⁴University of Michigan, Temperance, MI, ⁵Mayo Clinic, Rochester, MN, ⁶University of Colorado Anschutz Medical Campus, Aurora, CO, ⁷University of Michigan, Division of Rheumatology, Ann Arbor, MI
Background/Purpose: Neutrophil extracellular traps (NETs) are prothrombotic and proinflammatory webs of nuclear DNA, histones, and microbicidal proteins extruded by neutrophils into the extracellular space in…
Abstract Number: 1721 • ACR Convergence 2022
Protective Effects of the Natural Antioxidant Taxifolin in Models of Lupus and Antiphospholipid Syndrome
Christine Rysenga¹, Linda May-Zhang², Miela Zahavi³, Jason S Knight⁴ and Ramadan Ali¹, ¹University of Michigan, Ann Arbor, MI, ²Blue California, Rancho Santa Margarita, CA, ³Universtiy of Michigan, Ann Arbor, MI, ⁴University of Michigan, Division of Rheumatology, Ann Arbor, MI
Background/Purpose: Taxifolin, also known as dihydroquercetin, is a bioactive flavonoid commonly found in apples, onions, French maritime bark, and milk thistle. Given its potent anti-inflammatory…
Abstract Number: 1430 • ACR Convergence 2021
Autoantibodies Stabilize Neutrophil Extracellular Traps in COVID-19
Yu Zuo¹, Srilakshmi Yalavarthi¹, Sherwin Navaz¹, Claire Hoy¹, Alyssa Harbaugh¹, Kelsey Gockman¹, Melanie Zuo¹, Jacqueline Madison¹, Hui Shi¹, Yogendra Kanthi² and Jason Knight¹, ¹University of Michigan, Ann Arbor, MI, ²NHLBI, NIH, Bethesda, MD
Background/Purpose: The release of neutrophil extracellular traps (NETs) by hyperactive neutrophils is recognized to play an important role in the thromboinflammatory milieu inherent to severe…

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