Abstracts tagged "neutrophils"

Abstract Number: 0948 • ACR Convergence 2020
Mass Cytometry Reveals Activation Heterogeneity of Circulating Neutrophils in Systemic Lupus Erythematosus
Ricardo Grieshaber-Bouyer¹, Joshua Keegan², Peter Nigrovic³, James Lederer⁴ and Deepak Rao², ¹Department of Medicine V, Hematology, Oncology and Rheumatology, Heidelberg University Hospital, Heidelberg, Germany; Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA, Heidelberg, Germany, ²Brigham and Women's Hospital, Boston, MA, ³Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA, Boston, ⁴BWH Harvard Medical School, Boston, MA
Background/Purpose: Neutrophils are important effector cells in systemic immune-mediated diseases. Neutrophil phenotypes vary depending on their age, maturity, activation state, and local environment; however, differences…
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: 1518 • ACR Convergence 2020
The Role for Neutrophils in the Early Phases of Enthesitis in Spondyloarthritis
Zheni Stavre¹, Charles Bridgewood², Qiao Zhou², Yukiko Maeda³, Jozsef Karman⁴, Dennis McGonagle⁵ and Ellen Gravallese⁶, ¹University of Massachusetts Medical School-Rheumatology Division, Worcester, MA, ²University of Leeds, Leeds, United Kingdom, ³University of Massachusetts Medical School, worcester, MA, ⁴Abbvie Inc., Worcester, MA, ⁵The University of Leeds, Leeds Institute for Rheumatic and Musculoskeletal Medicine, NIHR Leeds Biomedical Research Centre, Leeds Teaching Hospitals Trust, Leeds, UK, Leeds, United Kingdom, ⁶Brigham and Women's Hospital, Boston, MA
Background/Purpose: Neutrophils are present in the early phases of spondyloarthritis (SpA)-associated uveitis, skin and intestinal disease, but their role in enthesitis remains unknown. We investigated…
Abstract Number: 0069 • ACR Convergence 2020
Identification of CD13 as a Potential Cause for SARS-CoV-2-triggered Hyperinflammation and Thrombosis
Eliza Pei-Suen Tsou¹, Gautam Sule¹, Mikel Gurrea Rubio², M. Asif Amin¹, Yu Zuo¹, Jason Knight¹, Yogendra Kanthi³ and David Fox¹, ¹Division of Rheumatology, University of Michigan, Ann Arbor, MI, ²Division of Rheumatology, University of Michigan, Canton, MI, ³Division of Cardiovascular Medicine, Ann Arbor
Background/Purpose: The ectopeptidase CD13, which is highly expressed on stromal and myeloid cells in joints, lung and other tissues, is a known receptor for many…
Abstract Number: 1818 • ACR Convergence 2020
IgG and IgA Autoantibodies Against L1 ORF1p Expressed in Granulocytes Correlate with Granulocyte Consumption and Disease Activity in Pediatric Systemic Lupus Erythematosus
Kennedy Ukadike¹, Kathryn Ni¹, Victoria Carter¹, Martin Taylor², John LaCava³, Lauren Pachman⁴, Xiaoxing Wang¹, Mary Eckert⁵, Anne Stevens¹, Christian Lood¹ and Tomas Mustelin¹, ¹University of Washington, Seattle, WA, ²Massachusetts General Hospital, Boston, MA, ³Rockefeller University, New York, NY, ⁴Department of Pediatrics, Northwestern University Feinberg School of Medicine; The Ann and Robert H. Lurie Children's Hospital of Chicago, Division of Pediatric Rheumatology; The CureJM Center of Excellence in Juvenile Myositis Research and Care, The Stanley Manne Children's Research Center of Chicago, Lake Forest, IL, ⁵Seattle Children's Hospital, Seattle, WA
Background/Purpose: To quantitate autoantibodies against the RNA-binding p40 (ORF1p) protein encoded by the L1 retroelement, expression of p40 itself, and markers of neutrophil death in…
Abstract Number: 0070 • ACR Convergence 2020
Neutrophils Transiting Through Megakaryocytes During Emperipolesis Exhibit Distinct Fates and Acquire the Capacity to Guide Other Neutrophils via MK Trails
Frank Huang¹, Pierre Cunin², Felix Radtke³, Ricardo Grieshaber-Bouyer⁴, Roxane Darbousset⁵ and Peter Nigrovic⁶, ¹Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Medicine V, Hematology, Oncology and Rheumatology, Heidelberg University Hospital, Heidelberg, Germany, Darmstadt, Baden-Wurttemberg, Germany, ²Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA, Boston, MA, ³Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Medicine V, Hematology, Oncology and Rheumatology, Heidelberg University Hospital, Heidelberg, Germany, Boston, ⁴Department of Medicine V, Hematology, Oncology and Rheumatology, Heidelberg University Hospital, Heidelberg, Germany; Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA, Heidelberg, Germany, ⁵Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA, Boston, ⁶Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA, Boston
Background/Purpose: Megakaryocytes (MKs) can contribute directly to experimental arthritis via pro-inflammatory microparticles containing IL-1 (Cunin et al. Journal of Clinical Investigation, 2017). MKs also interact…
Abstract Number: 28 • 2019 ACR/ARP Annual Meeting
Novel Ex Vivo Model of Septic Arthritis Identifies Role of Neutrophils in Joint Destruction
Kathryn McCall¹, Caroline Atherton ², Neal Millar ², Carl Goodyear ³, Tom Evans ⁴ and Iain McInnes ², ¹Institute of Infection, Immunity & Inflammation, University of Glasgow, Galsgow, United Kingdom, ²Institute of Infection, Immunity & Inflammation, University of Glasgow, Glasgow, United Kingdom, ³University of Glasgow, Glasgow, United Kingdom, ⁴Institute of Infection, Immunity & Inflammation, University of Glasgow, Glasgow
Background/Purpose: Septic arthritis (SA) caused by bacterial species, such as Staphylococcus aureus, has high morbidity and mortality1. Currently diagnosis is often prolonged and unreliable, with…
Abstract Number: 73 • 2019 ACR/ARP Annual Meeting
Potent Anti-neutrophil Properties of the Natural Compound 6-Gingerol in Models of Lupus and Antiphospholipid Syndrome
Ramadan Ali¹, Julia Weiner ¹, Alex Gandhi ¹, Shanea Estes ¹ and Jason Knight ², ¹University of Michigan, Ann Arbor, MI, ²Division of Rheumatology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI
Background/Purpose: 6-gingerol, the major bioactive compound of ginger root, is known to have anti-inflammatory and anti-oxidative effects. Indeed, ginger has been employed for millennia as…
Abstract Number: 81 • 2019 ACR/ARP Annual Meeting
UV Light Stimulates a Systemic Neutrophil Response Associated with Transient Kidney Injury
Sladjana Skopelja-Gardner¹, Joyce Tai ², Xizhang Sun ², Lena Tanaka ², Payton Hermanson ² and Keith Elkon ², ¹University of Washington, Seattle, WA, ²University of Washington, Seattle
Background/Purpose: Sensitivity to ultraviolet B (UVB) light affects ~70% of SLE patients and exacerbates both skin disease and systemic flares, including lupus nephritis (LN). Our…
Abstract Number: 118 • 2019 ACR/ARP Annual Meeting
Polymorphonuclear Neutrophils and Regulatory T Lymphocytes (Treg) Cooperate to Sustain Treg Activity but This Interaction Is Altered in Rheumatoid Arthritis Patients
Maxime Batignes ¹, François Santinon ¹, Marie-Christophe Boissier ², Patrice Decker ¹ and Natacha Bessis¹, ¹Inserm UMR 1125, University of Paris 13, Sorbonne Paris Cité, Bobigny, France, ²Assistance Publique-Hôpitaux de Paris (AP-HP), Rheumatology Department, Avicenne Hospital, Bobigny, France
Background/Purpose: Regulatory T cells (Treg) are necessary for immune homeostasis but are functionally deficient in inflammatory/autoimmune diseases such as rheumatoid arthritis (RA). On the other…
Abstract Number: 810 • 2019 ACR/ARP Annual Meeting
Small Vessel Vasculitis Syndrome with Autoinflammation Caused by De Novo Mutations in LYN Kinase
Adriana de Jesus¹, Gina Montealegre Sanchez ², Helen Freeman ³, Neil Martin ⁴, Ebun Omoyinmi ⁵, Katherine Calvo ⁶, Richard Chyi-chia Lee ⁷, Murray Passo ⁸, Natasha Ruth ⁸, David Kleiner ⁷, Yan Huang ⁹, Nirali Shah ¹⁰, Paul Brogan ¹¹, SuJin Hwang ¹², HyeSun Kuehn ¹², Sergio Rosenzweig ¹², Zuoming Deng ¹³, Anna Huttenlocher ¹⁴, Susan Moir ¹⁵, Douglas Kuhns ¹⁶ and Raphaela Goldbach-Mansky ¹⁷, ¹Translation Autoinflammatory Diseases Section/NIAID/NIH, Silver Spring, MD, ²Translational Autoinflammatory Disease Section/NIAID/NIH, Bethesda, ³Raigmore Hospital, Inverness, United Kingdom, ⁴Royal Hospital for Children, Glasgow, United Kingdom, ⁵University College London Institute of Child Health, London, United Kingdom, ⁶Hematology Service/Department of Laboratory Medicine/NIH, Bethesda, MD, ⁷Laboratory of Pathology/NCI/NIH, Bethesda, MD, ⁸Medical University of South Carolina, Charleston, SC, ⁹Translational Autoinflammatory Disease Section/NIAID/NIH, Bethesda, MD, ¹⁰Pediatric Oncology Branch/NCI/NIH, Bethesda, MD, ¹¹Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom, ¹²Immunology Service/Department of Laboratory Medicine/NIH, Bethesda, MD, ¹³Biomining and Discovery Section/NIAMS/NIH, Bethesda, MD, ¹⁴Department of Pediatrics/University of Wisconsin, Madison, WI, ¹⁵Immunopathogenesis Section/NIAID/NIH, Bethesda, MD, ¹⁶Collaborative Clinical Research Branch/NIAID/NIH, Bethesda, MD, ¹⁷Translational Autoinflammatory Diseases Section/NIAID/NIH, Bethesda, MD
Background/Purpose: Lyn kinase is a member of the Src family of non-receptor tyrosine-protein kinases that modifies signals from various cell surface receptors and regulates innate…
Abstract Number: 1789 • 2019 ACR/ARP Annual Meeting
Defibrotide Inhibits Antiphospholipid Antibody-Mediated NET Release and Endothelial Cell Activation
Ramadan Ali¹, Hui Shi ¹, Srilakshmi Yalavarthi ¹ and Jason Knight ², ¹University of Michigan, Ann Arbor, MI, ²Division of Rheumatology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI
Background/Purpose: Defibrotide is a mixture of phosphodiester oligonucleotides derived from porcine intestinal mucosa, currently approved for treatment of hepatic sinusoidal obstruction syndrome. Defibrotide has been…
Abstract Number: 2733 • 2019 ACR/ARP Annual Meeting
Inhibition of Neutrophil Elastase Reduces Autoantibody Levels and Renal Inflammation in Murine Lupus
Gautam Sule¹, Kristen Gilley ¹, Andrew Fernandes ¹, Srilakshmi Yalavarthi ¹ and Jason Knight ², ¹University of Michigan, Ann Arbor, MI, ²Division of Rheumatology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI
Background/Purpose: Dysregulated neutrophil extracellular trap (NET) release has been proposed as a source of autoantigens in lupus. Furthermore, it has recently been shown that the…
Abstract Number: 2804 • 2019 ACR/ARP Annual Meeting
Neutrophil Passage Through the Megakaryocyte Cytoplasm via Emperipolesis Modulates Neutrophil Migration
Pierre Cunin¹, Alexandra Wactor ², Li Guo ³, Andrew Weyrich ³, Éric Boilard ⁴ and Peter Nigrovic ⁵, ¹Department of Medicine, Division of Rheumatology, Immunology and Allergy, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, ²Department of Medicine, Division of Rheumatology, Immunology and Allergy, Brigham and Women’s Hospital, Harvard Medical School, Boston, ³Program in Molecular Medicine and Department of Internal Medicine, University of Utah, Salt Lake City, ⁴Axe maladies infectieuses et inflammatoires, Centre de recherche du CHU de Québec – Université Laval, Québec, Qc, Canada, Québec, QC, Canada, ⁵Department of Medicine, Division of Rheumatology, Immunology and Allergy, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA ; Department of Medicine, Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, MA, USA., Boston
Background/Purpose: Emperipolesis (EP) is a little-understood phenomenon referring to the presence neutrophils within megakaryocytes (MKs). We developed methods to study EP in vitro and in…
Abstract Number: 152 • 2018 ACR/ARHP Annual Meeting
Polymorphonuclear Neutrophils and Regulatory T Lymphocytes (Treg) Cooperate to Sustain Treg Activity in Normal and Arthritic Contexts
Maxime Batignes¹, François Santinon¹, Marie-Christophe Boissier^2,3, Patrice Decker⁴ and Natacha Bessis¹, ¹INSERM UMR 1125 University of Paris 13, Sorbonne Paris Cité, Bobigny, France, ²University of Paris 13,Sorbonne Paris Cité, Bobigny, France, ³Rheumatology Department, Assistance Publique – Hôpitaux de Paris (AP-HP), Avicenne Hospital, Bobigny, France, ⁴Inserm UMR 1125, Li2P, University of Paris 13, Sorbonne Paris Cité, Bobigny, France
Background/Purpose: Polymorphonuclear neutrophils (PMN) are abundant and activated in rheumatoid arthritis (RA) joints. In addition to their pro-inflammatory role, PMN exert immunoregulatory functions and may…

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