Abstracts tagged "T-Regulatory Cells"

Abstract Number: 2164 • 2014 ACR/ARHP Annual Meeting
Self-Phospholipids Regulate Inflammation Via Activation of CD1d-Restricted T-cells and Induction of ‘anti-inflammatory’ Myeloid-Derived Suppressor Cells (MDSC)
Ram Raj Singh^1,2,3,4, Cynthia Tran¹, Priti Prasad¹, Jing Wang⁵, Dirk Zajonc⁵ and Ramesh Halder¹, ¹Autoimmunity and Tolerance Laboratory, Department of Medicine/Rheumatology, UCLA, Los Angeles, CA, ²Interdepartmental Program in Molecular Toxicology, UCLA, Los Angeles, CA, ³Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA, ⁴Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, ⁵La Jolla Institute of Allergy and Immunology, La Jolla, CA
Background/Purpose Self-lipids play an increasingly appreciated role in immunity and inflammation. Lipid antigens are presented by CD1d and CD1a-d molecules in mouse and human, respectively,…
Abstract Number: 1799 • 2014 ACR/ARHP Annual Meeting
Elevated Indoleamine-2,3-Dioxygenase (IDO) Activity and Kynurinene-3-Monooxygenase (KMO) Expression in Interferon Positive Primary Sjogrens Syndrome Patients Is Associated with Increased CD25^hiFoxP3⁺regulatory Tcells: A Skew Towards Neurotoxicity or an Attempt to Rescue?
Naomi I Maria¹, Cornelia G. van Helden-Meeuwsen¹, Zana Brkic¹, Sandra M.J. Paulissen^1,2, Virgil A. Dalm¹, Paul L. van Daele¹, P. Martin van Hagen¹, Sinead M. Gibney^1,3, Andrew Harkin³, Hemmo A. Drexhage¹, Erik Lubberts^1,2 and Marjan A. Versnel¹, ¹Erasmus Medical Center, Immunology, Rotterdam, Netherlands, ²Erasmus Medical Center, Rheumatology, Rotterdam, Netherlands, ³Trinity College Institute of Neuroscience, Neuropsychopharmacology, Dublin, Ireland
Background/Purpose: A role for indoleamine-2,3-dioxygenase (IDO) in suppression of effector T-cell function and promotion of regulatory T-cell (Treg) differentiation has been described. IDO - the…
Abstract Number: 1750 • 2014 ACR/ARHP Annual Meeting
The Effect of a Pro-Inflammatory Milieu on Tregalizumab (BT-061)-Induced Regulatory T-Cell Activity
Jan Kubach¹, Faiza Rharbaoui², Martin Koenig², Jörg Schüttrumpf², Silke Aigner², Benjamin Dälken² and Helmut Jonuleit¹, ¹Department of Dermatology, University of Mainz Medical Center, Mainz, Germany, ²Biotest AG, Dreieich, Germany
Background/Purpose Regulatory T cells (Tregs) are essential for maintaining normal immune homeostasis. We have previously reported that tregalizumab is a humanized, non-depleting, CD4 agonistic antibody…
Abstract Number: 1737 • 2014 ACR/ARHP Annual Meeting
Altered Phenotype and Function of Senescent Regulatory T Cells in Rheumatoid Arthritis
Johannes Fessler¹, Chrsitine Schwarz¹, Anja C. Ficjan¹, Rusmir Husic², Evelyne Höller³, Angelika Lackner¹, Winfried B. Graninger⁴ and Christian Dejaco^1,5, ¹Rheumatology and Immunology, Medical University Graz, Graz, Austria, ²Rheumatology, Medical University Graz, Graz, Austria, ³Endocrinology, Medical University Graz, Graz, Austria, ⁴Internal medicine/Rheumatology and Immunology, Medical University Graz, Graz, Austria, ⁵Department of Rheumatology and Immunology, Medical University Graz, Graz A-8036, Austria
Background/Purpose Immunosenescence accompanied by accumulation of senescent T cells is a hallmark feature in the pathogenesis of rheumatoid arthritis (RA). Here we characterize a novel senescent…
Abstract Number: 1732 • 2014 ACR/ARHP Annual Meeting
Attenuation of Sclerodermatous Graft Versus Host Disease (sclGVHD) in IL4RA Receptor-Deficient Mice
Katia Urso¹, Kelly Tsang², Robert Lafyatis³ and Antonios O. Aliprantis², ¹Rheumatology, Brigham and Women's Hospital, Boston, MA, ²Rheumatology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, ³Rheumatology, Boston University School of Medicine, Boston, MA
Background/Purpose Scleroderma is a rare autoimmune disease characterized by the accumulation of fibrotic tissue in multiple organs including the skin, gut and lungs. To date,…
Abstract Number: 1642 • 2014 ACR/ARHP Annual Meeting
A Prospective Study of Vitamin D Effects on T Cells Phenotype in Patients with Systemic Lupus Erythematosus Treated with Different Regimens of Supplementation for Two Years
Silvia Piantoni, Laura Andreoli, Alessandra Zanola, Francesca Dall'Ara, Mirko Scarsi and Angela Tincani, Rheumatology and Clinical Immunology, Spedali Civili and University of Brescia, Brescia, Italy
Background/Purpose Vitamin D (VD) receptor is constitutively expressed on the membrane of multiple cells, including lymphocytes. Recent studies highlight that VD may have an action…
Abstract Number: 1455 • 2014 ACR/ARHP Annual Meeting
Ex Vivo-Expanded, but Not in Vitro-Induced, Human Regulatory T Cells Are Suitable for Cell Therapy in Rheumatological Autoimmune Diseases Thanks to Stable FOXP3 Demethylation
Maura Rossetti¹, Roberto Spreafico¹, Maryam Moshref², Jorg van Loosdregt³ and Salvatore Albani¹, ¹SingHealth Translational Immunology and Inflammation Centre, Singapore Health Services Pte Ltd, Duke-NUS Graduate Medical School, Translational Research Unit, Sanford-Burnham Medical Research Institute, Singapore, Singapore, ²Translational Research Unit, Sanford-Burnham Medical Research Institute, La Jolla, CA, ³Translational Research Unit, Sanford-Burnham Medical Research Institute, San Diego, CA
Background/Purpose: Treg cell therapy is a promising approach for transplant rejection and severe autoimmunity. Unfortunately, sufficient Treg numbers can be obtained only upon in vitroculture. Functional…
Abstract Number: 618 • 2014 ACR/ARHP Annual Meeting
A Gender Bias in Gut Microbiota of SKG Mice Colonized with a Limited Bacterial Consortium Associated with Severity of Spondyloarthritis and Ileitis Triggered By Beta-Glucan
Linda Rehaume, Olga Zbarskaya, Alicia Kang, Helen Benham, Paraic O Cuiv, Mark Morrison and Ranjeny Thomas, University of Queensland Diamantina Institute, Brisbane, Australia
Background/Purpose Beta-glucan (curdlan)-treated BALB/c ZAP-70W163C(SKG) mutant mice develop IL-23-dependent spondyloarthritis, and curdlan promotes ileitis in SKG mice housed under specific pathogen-free (SPF) but not germ-free…
Abstract Number: 449 • 2014 ACR/ARHP Annual Meeting
Citrullinated-Vimentin-Specific Regulatory T-Cell Responses Associate with ACPA Positive Individuals with Non-Specific Musculoskeletal Symptoms
Aamir Aslam¹, Jackie L. Nam¹, Laura Hunt¹, Chadi Rakieh¹, Ann W. Morgan² and Paul Emery¹, ¹NIHR-Leeds Musculoskeletal Biomedical Research Unit and Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, United Kingdom, ²NIHR-Leeds Musculoskeletal Biomedical Research Unit, University of Leeds, Leeds, United Kingdom
Background/Purpose: The pathogenesis of RA can be conceptualised by sequential phases that precede the development of synovitis. Autoimmune antibody responses, including ACPA, can precede clinical…
Abstract Number: 335 • 2014 ACR/ARHP Annual Meeting
Interleukin-33 Suppresses Experimental Arthritis through Promoting Foxp3⁺ Regulatory T-Cells and Type-2 Immune Responses in Mice
Jerome Biton¹, Allan Thiolat¹, Sara khaleghparast Athari¹, Delphine Lemeiter², Roxanne Herve¹, Patrice Decker¹, Jean-Philippe Girard³, Stephane Roga³, André Herbelin⁴, Anais Levascot⁴, Marie-Christophe Boissier² and Natacha Bessis¹, ¹INSERM UMR 1125, Li2P, University Paris 13, Sorbonne Paris Cité and Rheumatology Department, Avicenne Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Bobigny, France, ²INSERM UMR 1125, Li2P, University Paris 13, Sorbonne Paris Cité, Bobigny, France, ³Centre National de la Recherche Scientifique, Institut de Pharmacologie, dUniversité de Toulouse, Université Paul Sabatier, Institut de Pharmacologie et de Biologie Structurale et de Biologie Structurale, toulouse, France, ⁴INSERM U1082, Pôle Biologie Santé,, poitiers, France
Background/Purpose Interleukin (IL)-33 is a new member of the IL-1 family that exerts pleiotropic activities in innate and adaptive immunity. With its receptor ST2, they…
Abstract Number: 719 • 2013 ACR/ARHP Annual Meeting
Mammalian Target Of Rapamycin (mTOR) Skews T Cell Lineage Development In Systemic Lupus Erythematosus (SLE)
Hiroshi Kato¹ and Andras Perl², ¹Internal Medicine, Division of Rheumatology, SUNY Upstate Medical University, Syracuse, NY, ²Dept of Medicine, SUNY Upstate Medical University, Syracuse, NY
Background/Purpose: mTOR activity is increased in SLE T cells and its blockade has therapeutic efficacy in SLE. Murine studies showed essential roles of mTORC1 in…
Abstract Number: 665 • 2013 ACR/ARHP Annual Meeting
DNA hypermethylation of Forkhead box protein 3 (FOXP3) locus leads to quantitative defects of regulatory T cells in systemic sclerosis
Yaoyao Wang¹, Ye Shu², Qing Wang¹, Ming Zhao¹, Gongping Liang¹, Qianjin Lu¹ and Rong Xiao¹, ¹Department of Dermatology, Second Xiangya Hospital, Central South University, Changsha, China, ²Department of Dermatology, Hunan Children's Hospital, Changsha, China

Background/Purpose: Systemic sclerosis (SSc) is a systemic autoimmune disease of which the etiology and pathogenesis remains complex and poorly understood. Attention has recently been directed…
Abstract Number: 2696 • 2013 ACR/ARHP Annual Meeting
Impaired Bacterial Clearance and An Exuberant Inflammatory Response Promote Chlamydia-Induced Reactive Arthritis In SKG Mice
Athan Baillet¹, Linda Rehaume², Helen Benham², Connor O'Meara³, Charles Armitage⁴, Marina Harvie⁴, Geraldine Brizard⁵, Jared Velasco², John V. Forrester⁶, Mariapia Degli-Esposti⁵, Kenneth Beagley⁴ and Ranjeny Thomas², ¹Diamantina Institute, The University of Queensland, Brisbane, Australia, ²University of Queensland Diamantina Institute, Brisbane, Australia, ³Institute of Health & Biomedical Innovation, Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, Australia, ⁴Institute of Health & Biomedical Innovation, Brisbane, Australia, ⁵Lions Eye Institute, Nedlands, Australia, ⁶Lions Eye Institute, Nedlands, Bahrain
Background/Purpose: The sterile inflammatory arthritis associated with spondylitis, uveitis and rash, known as reactive arthritis, commences weeks after certain gastrointestinal or genitourinary infections, including Salmonella…
Abstract Number: 2698 • 2013 ACR/ARHP Annual Meeting
The Treg/Th17 Imbalance Of Patients With Systemic Lupus Erythematosus Were Mediated By Mir-663 Through Down-Regulating TGF-β1 Secretion Of Bone Marrow-Derived Mesenchymal Stem Cells
Lingyu Geng¹, Xia Li¹, Xuebing Feng² and Lingyun Sun³, ¹Department of Rheumatology and Immunology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China, ²Department of Rheumatology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China, ³the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
Background/Purpose: Systemic lupus erythematosus (SLE) patients exist an imbalance between CD4+CD25+FoxP3+ T regulatory (Treg) and IL-17-producing cells (Th17). Correction of this Treg/Th17 imbalance may have…
Abstract Number: 2711 • 2013 ACR/ARHP Annual Meeting
Self-Specific Polyclonal CD4 T Cells Enter a FR4^hi CD73^hi Anergic State To Prevent Immunopathology and Serve As a Reservoir For The Differentiation Of Protective Foxp3⁺ Tregs
Lokesh Kalekar¹ and Daniel L. Mueller², ¹University of Minnesota Medical School, Minneapolis, MN, ²Medicine/Rheumatic and Autoimmune Diseases, University of Minnesota Medical School, Minneapolis, MN
Background/Purpose: Clonal anergy has been proposed as a mechanism to allow for peripheral recognition of self antigens, without the consequence of immunopathology. Model systems have…

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