Abstracts tagged "B-Cell Targets"

Abstract Number: 1537 • ACR Convergence 2025
Local Immune effector Cell-Associated Toxicity Syndrome (LICATS) in CAR T-cell treated patients with Autoimmune Disease
Melanie Hagen¹, Fabian Müller², Andreas Wirsching¹, Soraya Kharboutli³, Silvia Spoerl³, Christina Duesing⁴, Tobias Krickau⁵, Markus Metzler⁵, Simon Völkl³, Michael Aigner³, Sascha Kretschmann³, Ingrid Vasova³, Marc Saake⁵, Stefan Schliep⁵, Torsten Kubacki⁶, Nicolas Hunzelmann⁶, Laura Bucci¹, Jule Taubmann⁷, Christina Bergmann¹, Andrea-Hermina Györfi⁸, Sascha Dietrich⁹, Jörg Distler¹⁰, Ricardo Grieshaber-Bouyer¹¹, Andreas Mackensen¹² and Georg Schett¹³, ¹Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ²University Hospital of Erlangen, Erlangen, Germany, ³Department of Medicine ⁵ - Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ⁴Klinik für Rheumatologie, Düsseldorf, Germany, ⁵Friedrich-Alexander-Universität Erlangen-Nürnberg, University Hospital Erlangen, Erlangen, Germany, ⁶University and University Hospital Cologne, Cologne, Germany, Cologne, Germany, ⁷Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ⁸Department of Rheumatology, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University., Düsseldorf, Germany, ⁹Heinrich Heine University Duesseldorf, University Hospital Duesseldorf, Duesseldorf, Germany, ¹⁰University Hospital Duesseldorf and HHU, Duesseldorf, Germany, ¹¹University Hospital Erlangen, Erlangen, Germany, ¹²Department of Medicine ⁵ - Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Uniklinikum Erlangen, Erlangen, Germany, ¹³Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany
Background/Purpose: CD19-targeting chimeric antigen receptor (CAR) T-cell therapy has revolutionized treatment strategies for severe B-cell driven autoimmune diseases (AID) like Systemic Lupus erythematosus (SLE), Systemic…
Abstract Number: 0912 • ACR Convergence 2025
CD11c⁺CD21⁻ Autoimmune-Associated B Cells Derived from Double-Negative IgD⁻CD27⁻ Subsets Exhibit Enhanced IFNLR1 Expression in Systemic Lupus Erythematosus
Roukaya Yaakoubi, Diana Alzamareh, Alexander William Bae and Jennifer Barnas, university of rochester, rochester, NY

Background/Purpose: Autoimmune-associated B cells (ABCs) are increasingly recognized for their role in the pathogenesis of systemic lupus erythematosus (SLE), yet their developmental origins and specific…
Abstract Number: 0263 • ACR Convergence 2025
A Multicenter Retrospective Case Series of Patients with Susac Syndrome treated with Rituximab
Michelle Benjamin¹, Mattia Wruble Clark², Shamik Bhattacharyya³, Audra Horomanski¹ and Kristin Galetta⁴, ¹Stanford University, Palo Alto, CA, ²Mass General Brigham, Somerville, MA, ³Brigham and Women's Hospital, Malden, MA, ⁴Stanford Medical Center, Palo Alto
Background/Purpose: Susac Syndrome (SuS) is a rare immune-mediated vasculo-occlusive disease characterized by a triad of encephalopathy, hearing loss, and branched retinal artery occlusions. Deficits can…
Abstract Number: 0005 • ACR Convergence 2025
LBL-047, A First-In-Class Anti-BDCA2/TACI Fusion Protein, Inhibits the Function of Both pDCs and B cells
Fengxia Li¹, Jianming Sun¹, Hailin Wang¹, Yan Zhu¹, Xiaoxiao Liu¹, Jing Li¹, Yurong Qin¹, Guojin Wu¹, Jing Guan¹, Min Chen¹, Jordan Zhu², Xiaoqiang Kang¹, Xiao Huang¹ and Hong Ling¹, ¹Nanjing Leads Biolabs Co., Ltd., Nan Jing, China (People's Republic), ²Nanjing Leads Biolabs Co., Ltd., Nan Jing
Background/Purpose: Blood dendritic cell antigen 2 (BDCA2) is specifically expressed on pDCs whose uncontrolled production of type I IFN play a crucial role in the…
Abstract Number: 2442 • ACR Convergence 2025
Reduction in Extrafollicular B Cell Responses in SLE Patients after CAR T Cell Therapy
Danae-Mona Nöthling¹, Kirill Anoshkin¹, Panagiotis Garantziotis¹, Laura Bucci¹, Tobias Rothe², Jule Taubmann³, Futoshi Iwata¹, Melanie Hagen¹, Andreas Wirsching¹, Simon Völkl⁴, Fabian Müller⁵, Aline Bozec¹, Andreas Mackensen⁶, Georg Schett⁷ and Ricardo Grieshaber-Bouyer⁸, ¹Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ²Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlagen, Germany, ³Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ⁴Department of Medicine ⁵ - Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ⁵University Hospital of Erlangen, Erlangen, Germany, ⁶Department of Medicine ⁵ - Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Uniklinikum Erlangen, Erlangen, Germany, ⁷Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany, ⁸University Hospital Erlangen, Erlangen, Germany
Background/Purpose: Systemic lupus erythematosus (SLE) is characterized by aberrant B cell activation and autoantibody production. CD19-targeted chimeric antigen receptor (CAR) T-cell therapy induces a short,…
Abstract Number: 1532 • ACR Convergence 2025
Preliminary Safety, Efficacy, and Cellular Kinetics of CTA313, a CD19/BCMA Dual-Targeted Universal CAR-T Therapy, for Active Systemic Lupus Erythematosus
Hanwei Wang¹, Yue Xie², Guojiao Yang³, Lu Han³, Jiangtao Ren⁴, Yali Zhou⁴, Wengang Ge³, Jan Davidson-Moncada⁴ and Huan Zhou⁵, ¹The Third People’s Hospital of Bengbu, Beng bu, China (People's Republic), ²Bioheng Therapeutics Limited, Nan Jing Shi, China (People's Republic), ³Bioheng Therapeutics Co., Limited, Nanjing, China (People's Republic), ⁴Bioheng Therapeutics Co., Limited, Nan Jing, China (People's Republic), ⁵Clinical Research Hospital of the First Affiliated Hospital of Anhui Medical University, Hefei, China (People's Republic)
Background/Purpose: SLE is characterized by B cell activation, autoantibody production and autoreactivity. Recently, CAR-T therapy has emerged as a promising strategy to deplete autoreactive B…
Abstract Number: 0913 • ACR Convergence 2025
Potent and Selective Oral IRF5 Degrader, KT-579, Demonstrates In Vitro and In Vivo Activity Comparable or Superior to Approved or Clinically Active Agents in Human Cellular Assays and Lupus Efficacy Models
Veronica Campbell¹, Yi Zhang¹, Virginia Massa¹, Jordan Leedberg¹, Erik Corcoran¹, Emily Lurier¹, Ryan Camire², Chris Carroll¹, Chris Ho¹, Dapeng Chen¹, Bradley Enerson¹, Revonda Mehovic¹, Ziyan Zhao¹, Lincoln Howarth¹, Susanne Breitkopf¹, Sarah Martinez¹, Melissa Ford¹, Xue Fei¹, Murugappan Sathappa¹, Juliet Williams³, Matthew Weiss³, Arsalan Shabbir³ and Nello Mainolfi⁴, ¹Kymera Therapeutics, Watertown, MA ⁰²⁴⁷², ²Kymera Therapeutics, Watertown, MA ⁰²⁴⁷², MA, ³Kymera Therapeutics, Watertown, ⁴Kymera Therapeutics, Watertown, MA
Background/Purpose: IRF5 is a transcription factor and regulator of immune responses activated downstream of pattern recognition receptors, in particular endosomal toll-like receptors (TLR), TLR7, TLR8…
Abstract Number: 0262 • ACR Convergence 2025
Preclinical Characterization of ABB071 – a Humanized anti-CD180 Antibody that Modulates Multiple Pro-inflammatory Immune Pathways for the Treatment of Autoimmune and Inflammatory Disorders
Margaret McDaniel, Brenda Stevens, Socheath Khim, Alan Wahl, Che-Leung Law and Edward Clark, Abacus Bioscience, Seattle, WA
Background/Purpose: CD180 is a Toll-like receptor (TLR) homolog expressed on antigen-presenting cells (APCs): B cells, dendritic cells, monocytes, and macrophages. While the extracellular domain of…
Abstract Number: 0003 • ACR Convergence 2025
In Vivo Generation of anti-CD19 CAR T Cells Utilizing Circular RNA Encapsulated in Targeted Lipid Nanoparticles
Xiaoyu Pan¹, Xiaoning Wang¹, Zhihao Chen¹, Xiaowen Zou¹, Siqi Li¹, Jian Ye¹, Fei Lin¹, Yang He¹, Edo Kon², Peng Zhu¹, Mengyun Chen¹ and Weiyi Zhang¹, ¹RiboX Therapeutics, Shanghai, China (People's Republic), ²RiboX Therapeutics, Cambridge, MA
Background/Purpose: Chimeric Antigen Receptor (CAR) T-cell therapy has revolutionized cancer treatment and shown promise in addressing autoimmune diseases. However, current ex vivo CAR T-cell therapies…
Abstract Number: 2695 • ACR Convergence 2025
B-cell depletion and lymphoid follicle disruption upon different B-cell depleting agents
Carlo Tur¹, Markus Eckstein², Laura Bucci¹, Janina Auth³, Christina Bergmann¹, Simon Rauber⁴, Melanie Hagen¹, Danae-Mona Nöthling¹, Sebastian Böltz¹, Andreas Wirsching¹, Filippo Fagni⁵, Giulia Corte⁶, Panagiotis Garantziotis¹, Jule Taubmann⁷, jochen wacker¹, Andreas Ramming⁸, Maria Antonietta D'Agostino⁹, Arndt Hartmann¹⁰, Fabian Müller¹¹, Andreas Mackensen¹², Ricardo Grieshaber-Bouyer¹³, Georg Schett¹⁴, Aline Bozec¹ and Maria Gabriella Raimondo¹, ¹Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ²Institute of Pathology and Comprehensive Cancer Center EMN, Friedrich-Alexander- Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ³Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Bayern, Germany, ⁴Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Bayern, Germany, ⁵Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Bayern, Germany, ⁶- Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ⁷Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ⁸Department of Internal Medicine ³, Rheumatology & Immunology, Friedrich-Alexander-University (FAU) & Universitätsklinikum Erlangen, Erlangen, Germany, ⁹Division of Rheumatology and Clinical Immunology - Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy, ¹⁰Institute of Pathology and Comprehensive Cancer Center EMN, Friedrich-Alexander- Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Bayern, Germany, ¹¹University Hospital of Erlangen, Erlangen, Germany, ¹²Department of Medicine ⁵ - Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) and Uniklinikum Erlangen, Erlangen, Germany, ¹³University Hospital Erlangen, Erlangen, Germany, ¹⁴Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany
Background/Purpose: Advanced protein-based therapies targeting B-cells, including glycoengineered CD20 monoclonal antibody obinutuzumab (OBI) and the CD19/CD3 T-cell engager blinatumumab (BLI), show promise for managing severe…
Abstract Number: 2425 • ACR Convergence 2025
Neutrophil Transcriptomics in SLE: Exploring Intrinsic, Ex Vivo Adaptation, and CAR-T Cell Therapy-Induced Changes
Ehsan Dehdashtian¹, Stefania Gallucci², Guangnan Hu³, Dominic Borie⁴ and Roberto Caricchio⁵, ¹UMass Chan Medical School, Worcester, MA, ²Temple University School of Medicine, Worcester, MA, ³UMass Chan School of Medicine, Worcester, MA, ⁴Kyverna Therapeutics, Emeryville, CA, ⁵University of Massachusetts Chan Medical School, Worcester, MA
Background/Purpose: Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by dysregulation of the adaptive and innate immune systems. Neutrophils, key players in innate immunity,…
Abstract Number: 1529 • ACR Convergence 2025
Updated Phase 1 Trial Data Assessing the Tolerability, Efficacy, Pharmacokinetics, and Pharmacodynamics of BMS-986353 (CC-97540), a CD19-directed Chimeric Antigen Receptor T Cell Therapy Using a Next-Generation Process for Severe, Refractory SLE
Georg Schett¹, David Simon², Margrit Wiesendanger³, Anca Askanase⁴, Vikas Majithia⁵, Neil Kramer⁶, Jacques Morel⁷, Philip J. Mease⁸, Ellen De Langhe⁹, Amit Saxena¹⁰, dominique Farge¹¹, Alain Lescoat¹², Alisha Desai¹³, Griff McTume¹⁴, Whitney Handy¹⁴, Sharmila Das¹³, Jerill Thorpe¹⁴, Alexis Melton¹⁴, Ashley Koegel¹⁴ and Emily Littlejohn¹⁵, ¹Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany, ²Department of Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum Berlin, Berlin, Germany, Berlin, Germany, ³Icahn School of Medicine at Mount Sinai, New York, NY, ⁴Columbia University Medical Center, New York, NY, ⁵Mayo Clinic Hospital, Jacksonville, FL, ⁶Overlook Medical Center; Atlantic Medical Group, Atlantic Health System, Summit, NJ, ⁷CHU and University of Montpellier, Montpellier, France, ⁸Department of Rheumatology, Providence-Swedish Medical Center and University of Washington, Seattle, WA, ⁹University Hospitals Leuven, Leuven, Belgium, ¹⁰Division of Rheumatology, Department of Medicine, NYU Grossman School of Medicine, New York, NY, ¹¹Hôpital Saint-Louis, Paris, France, ¹²CHU Rennes University Hospital, Rennes, France, ¹³Bristol Myers Squibb, Princeton, NJ, ¹⁴Bristol Myers Squibb, Princeton, ¹⁵Cleveland Clinic, Cleveland, OH
Background/Purpose: BMS-986353 (CC-97540; CD19 NEX-T) is a CD19-directed chimeric antigen receptor (CAR) T cell therapy that expresses the same CAR as lisocabtagene maraleucel (liso-cel); it…
Abstract Number: 0910 • ACR Convergence 2025
Development of Four Distinct Human IgG4-Producing Mouse Models Recapitulating IgG4-Related Disease
MIN GANG KIM¹, JINA YEO², HEA RIM KANG³, JAE HYUN MOON³, Seon Uk Kim⁴, SeoYoon Ban⁵, MI HYEON KIM⁶ and Eun Young Lee⁷, ¹Seoul National University College of Medicine, Seoul, Republic of Korea, ²Division of Rheumatology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea, ³Seoul National University College of Medicine, Jongno-gu, Seoul, Republic of Korea, ⁴Seoul National University, Jongno-gu, Seoul, Republic of Korea, ⁵Department of Cancer biology, Graduate School of College of Medicine, Seoul National University, Korea, Seoul, Republic of Korea, ⁶Hallym university dongtan sacred heart hospital, Seocho-gu, Seoul, Republic of Korea, ⁷Seoul National University College of Medicine, Seoul, South Korea
Background/Purpose: IgG4-related disease (IgG4RD) is an immune-mediated fibroinflammatory condition characterized by multi-organ involvement, elevated serum IgG4, and IgG4-positive plasma cell infiltrates that form tumor-like lesions…
Abstract Number: 0239 • ACR Convergence 2025
Safety of Rilzabrutinib, a BTK Inhibitor, in Adult Patients with IgG4-related disease (IgG4-RD) in a 52-week Phase 2 Open-label Study
Alireza Meysami¹, Mollie Carruthers², John Stone³, Fernando Martinez-Valle⁴, nicolas schleinitz⁵, Daniela Ghetie⁶, Robert Spiera⁷, Jeea Choi⁸, Leda Mannent⁹ and Owen Hagino⁸, ¹Henry Ford Health, Detroit, MI, ²Vancouver General Hospital, Vancouver, BC, Canada, ³Massachusetts General Hospital , Harvard Medical School, Concord, MA, ⁴Vall d’Hebron Hospital, Barcelona, Spain, ⁵Aix Marseille university, AP-HM, Marseille, France, ⁶Oregon Health and Science University, Portland, OR, ⁷Scleroderma, Vasculitis, and Myositis Center, Hospital for Special Surgery, Weill Cornell Medical College, New York, NY, ⁸Sanofi, Morristown, NJ, ⁹Sanofi, Gentilly, France
Background/Purpose: IgG4- related disease (IgG4-RD) is a chronic, progressive, immune-mediated fibrotic disease with limited treatment options. Rilzabrutinib is an orally available, reversible, inhibitor of Bruton's…
Abstract Number: 0002 • ACR Convergence 2025
KITE-363: An Autologous Anti-CD19/CD20 CAR-T Product for the Treatment of Autoimmune Rheumatic Diseases
Brian Kim, Christine Lowe, Francisco Flores, Jeremy Margaitis, Alessandro Calo, Stacey Valny, Anna Konecny, Eva Jaghatspanyan, Sean Yoder, Kenneth Ertel, Simone Filosto, Jodi Murakami and David Barrett, Kite, a Gilead Company, Santa Monica, CA
Background/Purpose: B-cell dysregulation is a key factor in the development and progression of autoimmune diseases, and B-cell inhibition has been a cornerstone of treatment for…

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