Abstracts tagged "citrullination"

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: 0020 • ACR Convergence 2021
Citrullination Drives the Expression of Pro-fibrotic Genes in Rheumatoid Arthritis Fibroblast-like Cells
Peter Maloley, Evan Ryan, Nozima Aripova, Michael Duryee, Bryant England, Ted Mikuls and Geoffrey Thiele, University of Nebraska Medical Center, Omaha, NE
Background/Purpose: The pathophysiology of rheumatoid arthritis (RA) is hallmarked by joint inflammation, thickening of the pannus, and resultant joint destruction. Within the synovial tissue, citrullinated…
Abstract Number: 0022 • ACR Convergence 2021
The Effects of MAA-Modified and/or Citrullinated Proteins on Calcium Influx and Peptidyl Arginine Deiminase (PAD) Expression in Macrophage
Andrew Gerber, Michael Duryee, Nozima Aripova, Bryant England, James O'Dell, Ted Mikuls and Geoffrey Thiele, University of Nebraska Medical Center, Omaha, NE
Background/Purpose: Expressed in synovial fluid mononuclear and other inflammatory cells, peptidyl arginine deiminase (PAD) catalyzes post-translational citrullination of synovial proteins in a calcium (Ca2+)-dependent manner.…
Abstract Number: 0508 • ACR Convergence 2021
The Impact of Macrophages Stimulated with Malondialdehyde-Acetaldehyde And/or Citrulline Modified Proteins on Fibroblasts Activation
Nozima Aripova, Michael Duryee, Evan Ryan, Peter Maloley, Bryant England, James O'Dell, Ted Mikuls and Geoffrey Thiele, University of Nebraska Medical Center, Omaha, NE
Background/Purpose: In rheumatoid arthritis (RA), chronic synovial inflammation is accompanied by fibrotic responses that together lead to pannus formation and progressive joint damage. Exposure to…
Abstract Number: 1006 • ACR Convergence 2021
MAA Modified and/or Citrullinated Proteins Stimulate Macrophages and Human Fibroblast-Like Synoviocytes to Increase the Secretion/Expression of Fractalkine Ligand (CX3CL1) and Fractalkine Receptor (CX3CR1)
Nozima Aripova, Michael Duryee, Peter Maloley, Bryant England, James O'Dell, Ted Mikuls and Geoffrey Thiele, University of Nebraska Medical Center, Omaha, NE
Background/Purpose: In rheumatoid arthritis (RA) synovium, activated synovial fibroblasts and macrophages release inflammatory mediators that affect surrounding cells and accelerate disease progression. One such chemokine…
Abstract Number: 1507 • ACR Convergence 2021
Role of CD4+ T Cells in the Pathogenesis of RA: Immunization with Citrullinated T Cell Epitopes Is Sufficient to Induce Immunological and Clinical Manifestations of Arthritis in DR4-Transgenic Mice
Elena Tonti¹, Bhargavi Duvvuri², Sudeshna Dhar¹, Derek Haaland³, Maggie Larche¹ and Mark Larché¹, ¹McMaster University, Hamilton, ON, Canada, ²University of Washington, Seattle, WA, ³McMaster University, Hamilton, Ontario and The Waterside Clinic, Oro Medonte, ON, Canada
Background/Purpose: Although the etiology of rheumatoid arthritis (RA) remains unclear, existing research suggests a complex interplay of both genetic and environmental factors. Citrullinated proteins/peptides, and…
Abstract Number: 0770 • ACR Convergence 2020
Effect of Citrullination on the Processing and Presentation of Rheumatoid Arthritis Autoantigens
Ashley Curran¹, Jonathan Crawford¹ and Erika Darrah¹, ¹Division of Rheumatology, Johns Hopkins University, Baltimore, MD
Background/Purpose: Citrullinated proteins are hallmark targets of the autoimmune response in rheumatoid arthritis (RA), but the mechanism by which immune tolerance is broken to these self-proteins…
Abstract Number: 1220 • ACR Convergence 2020
Increased Serum Levels of Circulating Vimentin and Citrullinated Vimentin Are Differently Regulated by Tocilizumab and Methotrexate Monotherapies in Rheumatoid Arthritis
Patryk J. Drobinski¹, Anne C. Bay-Jensen², Anne S. Siebuhr³ and Morten A. Karsdal³, ¹University of Copenhagen/Nordic Bioscience, Copenhagen, Denmark, ²Nordic Bioscience, Herlev, Denmark, ³Nordic Bioscience A/S, Herlev, Denmark
Background/Purpose: Presence of citrullinated protein fragments in the circulation of patients with Rheumatoid Arthritis (RA) is a highly disease-specific phenomenon. Vimentin is often a target…
Abstract Number: 1848 • ACR Convergence 2020
Identification of Native and Citrullinated Autoantibodies to Psoriasis Related-antigen PsoP27 in Synovial Fluids of Patients with Psoriatic Arthritis
Marina Slobodkin¹, Smadar Gertel¹, Ari Polachek², Victoria Furer³ and Ori Elkayam⁴, ¹Tel-Aviv Sourasky Medical Center, Tel-Aviv, Israel, ²Tel Aviv Sourasky Medical Center, Petah-Tikva, Israel, ³Tel Aviv Sourasky Medical Center, Tel Aviv, Israel, ⁴Tel Aviv Sourasky Medical Center,, Tel aviv, Israel
Background/Purpose: Psoriatic arthritis (PsA) is an inflammatory joint disease with no serological biomarkers, hence diagnosis is based on clinical evaluation alone. PsA is closely associated…
Abstract Number: 2043 • ACR Convergence 2020
Identification and Validation of Citrulline Specific TCRs in CD4+T Cells in Rheumatoid Arthritis
Ravi Kumar¹, Niyaz Yoosuf², Sanjay Boddul², Christina Gerstner³, Sara Turcinov⁴, Anatoly Dubnovitsky⁵, Fredrik Wermeling², Karine Chemin⁶ and Vivianne Malmström⁷, ¹Division of Rheumatology, Department of Medicine, Stickholm, Stockholms Lan, Sweden, ²Division of Rheumatology, Department of Medicine, Stockholm, Sweden, ³Division of Rheumatology, Department of Medicine,Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden, ⁴Division of Rheumatology, Department of Medicine,Center for Molecular Medicine, Institutet, Stockholm, Sweden, ⁵Karolinska Institutet, Stockholm, ⁶Division of Rheumatology, Department of Medicine, Stockholm, Stockholms Lan, Sweden, ⁷Karolinska Institutet, Stockholm, Stockholms Lan, Sweden
Background/Purpose: Citrulline (cit) autoimmunity is central in rheumatoid arthritis (RA), including both anti-citrulline protein antibodies (ACPA) and autoreactive CD4+ T cells. While the ACPA are…
Abstract Number: 35 • 2019 ACR/ARP Annual Meeting
Mass Cytometry Identifies Enhanced Histone H3 Citrullination and TNFα Production by CD14 Monocytes in Subjects At-Risk for Future Development of Rheumatoid Arthritis
Yuko Okamoto¹, Elena W.Y. Hsieh ², Ronald P. Schuyler ³, Jennifer Seifert ⁴, Marie Feser ⁵, Jill Norris ⁶, M. Kristen Demoruelle ⁷, Kevin Deane ⁵ and V. Michael Holers ⁴, ¹University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA and Tokyo Women’s Medical University School of Medicine, Department of Rheumatology, Tokyo, Japan, Denver, ²University of Colorado School of Medicine, Department of Immunology and Microbiology, Aurora, CO, USA and University of Colorado School of Medicine, Children’s Hospital Colorado, Department of Pediatrics, Section of Allergy & Immunology, Aurora, CO, USA, Denver, ³University of Colorado School of Medicine, Department of Immunology and Microbiology Aurora, CO, USA, Denver, ⁴University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA, Denver, ⁵University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA, Aurora, CO, ⁶Colorado School of Public Health, Department of Epidemiology, Aurora, CO, USA, Denver, ⁷University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA, Aurora
Background/Purpose: Our group previously demonstrated that sputum neutrophils from subjects At-Risk for future rheumatoid arthritis (RA) spontaneously form neutrophil extracellular traps with elevated histone H3…
Abstract Number: 488 • 2019 ACR/ARP Annual Meeting
Citrullinated Antigens with Multiple Citruline Similar Motif Could Be Used for RA Diagnosis
zhiwei ru ¹, Xuedong Chen ², Xiaoyan huang ¹, Jianrong Lou ¹, YongZheng peng ³ and Xiang Yang¹, ¹Leide bioscience Inc, guang zhou, Guangdong, China (People's Republic), ²Southern Medicine University, guang zhou, Guangdong, China (People's Republic), ³Southern Medicine University, guang dong, Guangdong, China (People's Republic)
Background/Purpose: Rheumatoid arthritis (RA) is a systemic autoimmune disease characterized by chronic joint inflammation that ultimately leads to joint destruction. Diagnosis of RA is important…
Abstract Number: 991 • 2019 ACR/ARP Annual Meeting
Identification of Citrullinated Peptide Specific T-cells in Humanized Mice Immunized with Citrullinated Peptides
Matthew McElwee¹, Thamotharampillai Dileepan ¹ and Marc Jenkins ¹, ¹University of Minnesota, Minneapolis, MN
Background/Purpose: Seropositive rheumatoid arthritis (RA) is a T-cell mediated disease that is characterized by the presence of antibodies to proteins that have undergone the post-translational…
Abstract Number: 2016 • 2019 ACR/ARP Annual Meeting
Expression of Peptidyl-arginine Deiminases in Peripheral Blood Neutrophils and Its Association with Single Nucleotide Variants in Patients with Rheumatoid Arthritis
Masayoshi Harigai¹, Ryoko Sakai ², Takahiko Sugihara ³ and Akihito Ishigami ⁴, ¹Department of Rheumatology, Tokyo Women's Medical University School of Medicine, Shinjuku-ku, Tokyo, Japan, ²Department of Rheumatology, Tokyo Women’s Medical University, Tokyo, Japan, ³Tokyo Medical and Dental University, Tokyo, Japan, ⁴Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
Background/Purpose: Peptidyl-arginine deiminases (PADIs) are enriched in neutrophils and considered to be responsible for citrullination of proteins in vivo. Autoantibody against citrullinated proteins are frequently…
Abstract Number: 2818 • 2019 ACR/ARP Annual Meeting
Differences in the Phenotypic Landscape and Antigen Specificity of CD4+ T Cells Are Present in CCP+ Subjects Before the Onset of Rheumatoid Arthritis
Virginia Muir ¹, Cliff Rims ¹, Kevin Deane ², Jeffrey Carlin ³, Sylvia Posso ¹, Sunil Nagpal ⁴, Navin Rao ⁴, Frédéric Baribaud ⁵, George Vratsanos ⁶, William Robinson ⁷, Gary Firestein ⁸, V. Michael Holers ⁹, Peter Linsley ¹, Eddie James¹ and Jane Buckner ¹, ¹Benaroya Research Institute, Seattle, WA, ²University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA, Aurora, CO, ³Virginia Mason Medical Center, Seattle, WA, ⁴Janssen R&D, Spring House, PA, ⁵Janssen Research & Development, LLC, Spring House, PA, ⁶JNJ, Raritan, NJ, ⁷Stanford University, Palo Alto, CA, ⁸University of California, San Diego, San Diego, ⁹University of Colorado Denver, Division of Rheumatology, Aurora, CO, USA, Denver
Background/Purpose: The “Targeting Immune Responses for Prevention of RA” (TIP-RA) collaboration studies individuals at high risk for developing rheumatoid arthritis (RA) because of serum anti-citrullinated…

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