Abstracts tagged "citrullination"

Abstract Number: LB23 • ACR Convergence 2025
A Phase 1 Study of Autologous CAR-Treg Cells in Refractory Rheumatoid Arthritis: Interim Report of Safety and Efficacy
Minna Kohler¹, Sally Arai², Fawad Aslam³, Gregory Challener⁴, Matthew Frigault⁴, Melissa Griffith⁵, Tamiko Katsumoto⁶, Elena Massarotti⁷, Larry Moreland⁸, Allison Rosenthal⁹, Jeffrey Sparks⁷, Janeth Yinh⁴, Sarah Baxter¹⁰, Ari Bitton¹¹, Jason Dubovsky¹², Victor Yuan¹³, Mindy Jensen¹⁴, Andrew Clauw¹⁵, Gabrielle Furman⁴, Rita Gyurko⁷, Megan Hall⁹, Anna McIntyre⁴, Jennifer Seifert¹⁶, Emma Stainton², Michelle Blake¹⁰, Sabrina Fox-Bosetti¹³, Herve Lebrec¹³, Amanda Pace¹⁰, Yuanyuan Xiao¹⁷, Mei-Lun Wang¹⁸, Joe Arron¹³ and Jeffrey Bluestone¹⁹, ¹Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, ²Stanford, Palo Alto, California, ³Mayo Clinic, Arizona, Scottsdale, Arizona, ⁴Massachusetts General Hospital, Boston, Massachusetts, ⁵University of Colorado Anschutz Medical Campus, Aurora, Colorado, ⁶Stanford University, Millbrae, California, ⁷Brigham and Women's Hospital, Boston, Massachusetts, ⁸University of Colorado, Denver, Colorado, ⁹Mayo Clinic, Phoenix, Arizona, ¹⁰Sonoma Biotherapeutics, Seattle, Washington, ¹¹Sonoma Biotherapeutics, San Diego, California, ¹²Sonoma Biotherapeutics, Thousand Oaks, California, ¹³Sonoma Biotherapeutics, South San Francisco, California, ¹⁴Sonoma Bio, Seattle, Washington, ¹⁵University of Colorado, Aurora, Colorado, ¹⁶University of Colorado and Oklahoma Medical Research Foundation, Aurora, Colorado, ¹⁷Sonoma Biotherapeutics, Los Altos, California, ¹⁸Sonoma Biotherapeutics, San Francisco, California, ¹⁹Sonoma Biotherapeutics Inc, South San Francisco, California
Background/Purpose: Regulatory T cells (Tregs) modulate inflammation, maintain self-tolerance, promote tissue repair, and hold promise as a versatile therapeutic. Autologous polyclonal Tregs have a favorable…
Abstract Number: 1779 • ACR Convergence 2025
Citrullinated and Malondialdehyde-Acetaldehyde Modified Fibrinogen Activates Macrophages and Induces Inflammatory Responses in Coronary Endothelium
Wenxian Zhou¹, Hannah Johnson², Michael Duryee², Engle Sharp², Carlos Hunter², Tate Johnson², Mabruka Alfaidi², Daniel Anderson³, Kishore Bidasee², Geoffrey Thiele² and Ted Mikuls², ¹University of Nebraska Medical Center, Bellevue, NE, ²University of Nebraska Medical Center, Omaha, NE, ^30587964, Durham, NC
Background/Purpose: Endothelial cell (EC) dysfunction is a key driver of cardiovascular (CV) complications in rheumatoid arthritis (RA), yet mechanisms underlying EC dysfunction in RA are…
Abstract Number: 1374 • ACR Convergence 2025
AZD1163, a Novel Bispecific Human Antibody Targeting PAD2/4 Enzymes Responsible for Generating Citrullinated Protein Auto-antigens in Rheumatoid Arthritis, Demonstrates Dose-dependent Inhibition of Systemic PAD Activity in Healthy Volunteers
Susanne Prothon¹, Jacob Leander¹, Ulla Seppälä¹, Eduard Molins², Mia Collins¹, Nicholas White³, Ivonne Puente¹, Andre Santa Maria¹, Gary Sims⁴, David Han⁵, Obada Al Hamdan⁶, Ronald Goldwater⁷, Emon Khan⁸ and David Close⁹, ¹AstraZeneca, Gothenburg, Sweden, ²AstraZeneca, Barcelona, Spain, ³AstraZeneca, Cambridge, United Kingdom, ⁴AstraZeneca, Gaithersburg, ⁵Parexel, Los Angeles, ⁶Parexel, Berlin, Germany, ⁷Parexel, Baltimore, ⁸BioPharmaceuticals R&D, Late Respiratory and Immunology, AstraZeneca, Academy House, Cambridge, United Kingdom, ⁹AstraZeneca, Royston, United Kingdom
Background/Purpose: AZD1163 is a novel bispecific antibody that inhibits the activity of extracellular Peptidyl Arginine Deiminases (PADs) 2 and 4, enzymes responsible for protein citrullination…
Abstract Number: 0928 • ACR Convergence 2025
Radiolabelled anti-citrullinated histone antibody CIT-013 as a tool to visualize NET rich inflamed joints in a collagen induced arthritic mouse model
Annemarie Kip¹, Daphne Dorst², Birgitte Walgreen², Monique Helsen², Eric meldrum¹, Renato Chirivi¹ and Marije Koenders², ¹Citryll BV, Oss, Netherlands, ²RadboudUMC, Nijmegen, Netherlands
Background/Purpose: Neutrophil Extracellular Traps (NETs) contribute to the pathophysiology of multiple immune-mediated inflammatory diseases including Rheumatoid Arthritis (RA), and may be promising therapeutic targets. The…
Abstract Number: 0924 • ACR Convergence 2025
Human Serum Albumin Co-Modified with Malondialdehyde-Acetaldehyde and Citrulline Bind Multiple Scavenger Receptors and Alter Cellular Morphology
Lauren Klingemann¹, Michael Duryee¹, Nozima Aripova¹, Wenxian Zhou², Hannah Johnson¹, Breanna Butler¹, Carlos Hunter¹, Ted Mikuls¹ and Geoffrey Thiele¹, ¹University of Nebraska Medical Center, Omaha, NE, ²University of Nebraska Medical Center, Bellevue, NE
Background/Purpose: Post-translational modifications (PTMs) of self-proteins are implicated in the pathogenesis of rheumatoid arthritis (RA). The PTMs, malondialdehyde-acetaldehyde (MAA), citrulline (CIT), and the co-modification of…
Abstract Number: 0501 • ACR Convergence 2025
Phase 1b Study of SBT777101, an Engineered CAR-T-Regulatory Cell Product, in Patients With Rheumatoid Arthritis: Interim Demographics and Safety
Sarah Baxter¹, Ari Bitton², Victor Yuan², Fawad Aslam³, Gregory Challener⁴, Jonathan Graf⁵, Melissa Griffith⁶, Tamiko Katsumoto⁷, Minna Kohler⁸, Elena Massarotti⁹, Larry Moreland¹⁰, Allison Rosenthal¹¹, Jeffrey Sparks⁹, Steven Vlad¹², Janeth Yinh¹³, Andrew Clauw¹⁴, Sally Arai¹⁵, Alexander Carvidi⁵, Angela Chavez¹⁶, Olivia Gabriel¹⁷, Rita Gyurko¹⁷, Megan Hall¹⁸, Jennifer Seifert¹⁹, Emma Stainton¹⁵, Michelle Blake¹, Sabrina Fox-Bosetti², Mark Fromhold¹, Mindy Jensen²⁰, Herve Lebrec², Sean O'Bryan², Amanda Pace²¹, Mei-Lun Wang², Yuanyuan Xiao², Joseph Arron² and Jeffrey Bluestone²², ¹Sonoma Biotherapeutics, Seattle, WA, ²Sonoma Biotherapeutics, San Francisco, CA, ³Mayo Clinic, Arizona, Scottsdale, AZ, ⁴MGH, Boston, MA, ⁵UCSF, San Francisco, CA, ⁶University of Colorado, Aurora, CO, ⁷Division of Immunology and Rheumatology, Stanford University, Millbrae, CA, ⁸Massachusetts General Hospital, Harvard Medical School, Boston, MA, ⁹Brigham and Women's Hospital, Boston, MA, ¹⁰University of Colorado, Denver, CO, ¹¹Mayo Clinic, Phoenix, ¹²Tufts Medicine, Boston, MA, ¹³Massachusetts General Hospital, Boston, MA, ¹⁴Univ of Colorado, Aurora, CO, ¹⁵Stanford, Palo Alto, CA, ¹⁶Tufts, Boston, MA, ¹⁷BWH, Boston, MA, ¹⁸Mayo, Scottsdale, AZ, ¹⁹University of Colorado and Oklahoma Medical Research Foundation, Aurora, CO, ²⁰Sonoma Bio, Seattle, ²¹Sonoma Bio, Seattle, WA, ²²Sonoma Biotherapeutics, South San Francisco, CA
Background/Purpose: Regulatory T cells (Tregs) modulate inflammation, maintain self-tolerance, and promote tissue repair, and thus hold promise as a versatile therapeutic tool. Autologous polyclonal Tregs…
Abstract Number: 0079 • ACR Convergence 2025
Association of Protein Arginine Deiminase 4 with the Myosin-9 Motor Complex
Fatemeh Neela Moadab, Farheen Shaikh, Xiaoxing Wang, cecilia mustelin, Ethan Le, Rayan Najjar, Jie An, Alison Bays and Tomas Mustelin, University of Washington, Seattle, WA
Background/Purpose: Genetic association data, immunohistochemistry, and functional experiments implicate protein arginine deiminase 4 (PAD4) in the pathogenesis of rheumatoid arthritis (RA). This disease is characterized…
Abstract Number: 0078 • ACR Convergence 2025
Citrullinated Serum Albumin Is Not an Autoantigen in Rheumatoid Arthritis
Farheen Sultan Shaikh, cecilia mustelin, Xiaoxing Wang and Tomas Mustelin, University of Washington, Seattle, WA
Background/Purpose: Autoantibodies against citrullinated proteins (ACPAs) are diagnostic of rheumatoid arthritis (RA), an autoimmune disease primarily affecting synovial joints. Proteomic analyses have identified human serum…
Abstract Number: 0062 • ACR Convergence 2024
Pro-Fibrotic Effects of Malondialdehyde-Acetaldehyde-Adducted and/or Citrullinated Proteins on Macrophages and Human Lung Fibroblasts
Lauren Klingemann¹, Nozima Aripova¹, Nigina Aripova², Michael Duryee¹, Carlos Hunter¹, Jill Poole¹, Bryant England¹, Ted Mikuls¹ and Geoffrey Thiele¹, ¹University of Nebraska Medical Center, Omaha, NE, ²WUSTL, St. Louis, MO
Background/Purpose: Clinically evident rheumatoid arthritis-associated interstitial lung disease (RA-ILD) affects approximately 10-15% of patients with rheumatoid arthritis (RA) and accounts for the most overrepresented cause…
Abstract Number: 0065 • ACR Convergence 2024
Evidence of Membranolytic Targeting and Intracellular Citrullinationin Neutrophils Isolated from Patients with Rheumatoid Arthritis
Neela Fatemeh Moadab¹, Tal Gazitt², Rayan Najjar¹, Ethan Le¹, J Lee Nelson³, Vijay Joshua⁴, Keith Elkon¹, Caroline Grönwall⁴ and Tomas Mustelin¹, ¹University of Washington, Seattle, WA, ²Carmel Hospital, Haifa, Israel, ³University of Washington and Fred Hutchinson Cancer Center, Seattle, WA, ⁴Karolinska Institutet, Stockholm, Sweden
Background/Purpose: Anti-citrullinated protein autoantibodies (ACPA) are diagnostic for rheumatoid arthritis (RA). The antigens recognized by these autoantibodies are produced by protein arginine deiminases (PADs), particularly…
Abstract Number: 1846 • ACR Convergence 2024
Citrullinated Vimentin-reactive Immune-regulatory CD4+CD39+TIGIThi T Cells Expand During Drug Free Remission in HLA-DR Shared-epitope+ ACPA+ Rheumatoid Arthritis
Amy Anderson¹, Henrique de Paula Lemos¹, Hendrik Nel², Sofia Sorbet Santiago¹, Fiona Rayner³, Abbie Degnan¹, Imogen Wilson¹, Julie Diboll¹, Jasmine Sim¹, Andrew Melville⁴, Stefan Siebert⁴, Iain McInnes⁵, Carl Goodyear⁴, Catharien Hilkens¹, Andrew Filer⁶, Karim Raza⁶, Christopher Buckley⁷, Hugh Reid⁸, Kenneth Baker¹, Arthur Pratt³, Jamie Rossjohn⁸, Ranjeny Thomas⁹ and John Isaacs¹, ¹Translational and Clinical Research Institute, NIHR Newcastle Biomedical Research Centre, Newcastle University and The Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom, ²Frazer Institute, The University of Queensland, Translational Research Institute, Brisbane, Australia, ³Translational and Clinical Research Institute, NIHR Newcastle Biomedical Research Centre, Newcastle University and The Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, England, United Kingdom, ⁴School of Infection and Immunity, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom, ⁵University of Glasgow, College of Medical Veterinary and Life Sciences, Glasgow, United Kingdom, ⁶Rheumatology Research Group, Institute for Inflammation and Ageing, NIHR Birmingham Biomedical Research Center and Clinical Research Facility, University of Birmingham, Birmingham, United Kingdom, ⁷Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom, ⁸Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria, Australia, ⁹University of Queensland, Brisbane, Australia
Background/Purpose: There is a need for immunotherapy that sustains symptom remission without ongoing need for disease modifying drugs (DMARDs). In a phase 1b trial of…
Abstract Number: 1858 • ACR Convergence 2024
Co-modification of Citrullinated Proteins with Malondialdehyde-Acetaldehyde Leads to Amplified T Cell Responses and Increased Disease-specific Autoantibody Concentrations
Breanna Butler¹, Wenxian Zhou², Michael Duryee¹, Nozima Aripova¹, Engle Sharp¹, Carlos Hunter¹, Bridget Kramer¹, Harlan Sayles¹, James O'Dell¹, Geoffrey Thiele¹, Bryant England¹, Joshua Baker³, Andreas Reimold⁴, Gail Kerr⁵ and Ted Mikuls¹, ¹University of Nebraska Medical Center, Omaha, NE, ²University of Nebraska Medical Center, Bellevue, NE, ³University of Pennsylvania, Philadelphia, PA, ⁴Dallas VA Medical Center, Dallas, TX, ⁵Washington DC VAMC/Georgetown and Howard Universities, Washington, DC
Background/Purpose: Anti-citrullinated protein antibody (ACPA) is highly specific to rheumatoid arthritis (RA). Beyond citrullination, other post-translational protein modifications including malondialdehyde-acetaldehyde (MAA) are targeted by T…
Abstract Number: 0045 • ACR Convergence 2024
Proteomic Analysis of the Rheumatoid Arthritis Citrullinome Reveals an Enrichment of Citrullinated Complement Proteins
Khushali Trivedi¹, Clarissa Klenke², Jun Kim¹, Jeba Atkia Maisha², Alina Sememenko¹, XIAOBO MENG², Mario Navarrete¹, Hani El-Gabalawy² and Liam O'Neil², ¹University of Manitoba, Winnipeg, Canada, ²University of Manitoba, Winnipeg, MB, Canada
Background/Purpose: Citrullination is a key physiological process that drives autoantibody formation in Rheumatoid Arthritis (RA). This irreversible post-translational modification of the amino acid arginine is…
Abstract Number: 0046 • ACR Convergence 2024
Impaired Neutrophil Extracellular Trap (NET) Degradation in Rheumatoid Arthritis (RA) and Pre-clinical RA Is Mediated by Anti-NET Antibodies
Jeba Atkia Maisha¹, Alina Sememenko², Jun Kim², Mario Navarrete², XIAOBO MENG¹, Hani El-Gabalawy¹ and Liam O'Neil¹, ¹University of Manitoba, Winnipeg, MB, Canada, ²University of Manitoba, Winnipeg, Canada
Background/Purpose: Rheumatoid Arthritis (RA) begins after a prolonged preclinical phase which is marked by the development of RA antibodies, typically against citrullinated proteins (ACPA). The…
Abstract Number: L08 • ACR Convergence 2023
Early Clinical Development of CIT-013, a First in Class NETosis Inhibitor, in a Randomized Phase I Dose Escalation Study in Healthy Volunteers Demonstrating Potent Inhibition of LPS Induced Neutrophil Extracellular Trap Formation
Leonie Middelink¹, Renato Chirivi², Helmuth van Es², Eric Meldrum², Peter van Zandvoort², Tirza Bruurmijn², Matthijs Moerland³ and Patrick Round², ¹Middelinc., Utrecht, Netherlands, ²Citryll BV, Oss, Netherlands, ³CHDR, Leiden, Netherlands
Background/Purpose: Aberrant Neutrophil Extracellular Traps (NETs) production contributes to the pathophysiology of multiple inflammatory and autoimmune diseases such as Rheumatoid arthritis (RA) Hidradenitis suppurativa (HS),…

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