Abstracts tagged "B-Cell Targets"

Abstract Number: 0001 • ACR Convergence 2025
ATG-201, a Novel Steric Hindrance-based Masking CD19xCD3 T-cell Engager (TCE) for the Treatment of B Cell-related Autoimmune Diseases
Gang Bian¹, Tengteng Li¹, Huiling Liu², Zaoshun Hu², Peng Chen¹, Jay Mei³ and Bing Hou³, ¹Shanghai Antengene Corporation Limited, Shanghai, China (People's Republic), ²Antengene (Hangzhou) Biologics, Hangzhou, Zhejiang, China (People's Republic), ³Antengene Corporation, Shanghai, China (People's Republic)
Background/Purpose: CD19-targeted therapies, such as chimeric antigen receptor (CAR)-T or T-cell engagers (TCE), have been approved for the treatment of B cell malignancies. By depleting…
Abstract Number: 2665 • ACR Convergence 2025
Preexisting Antibodies Against Vaccine Antigens Are Preserved In Patients With Systemic Lupus Erythematosus and Sjögren’s Disease Upon Ianalumab Treatment While Autoantibodies Decline
Thomas Dörner¹, Nan Shen², Thomas Grader-Beck³, Caroline Walter⁴, Catherine Wioland⁴, Celine Rauld⁴, Patrick Schmutz⁴, Simone Riek⁴, Wolfgang Hueber⁵, CAROLE SIPS⁶, Stephen Oliver⁴, Carol Lau⁷, Claire Bonal⁶ and Isabelle Isnardi⁸, ¹Charite Universitétsmedizin Berlin, Germany and DRFZ, Berlin, Berlin, Germany, ²Shanghai Jiang Tong University School of Medicine, Shanghai, China (People's Republic), ³Johns Hopkins, Reisterstown, MD, ⁴Novartis Pharma AG, Basel, Switzerland, ⁵Novartis Pharmaceuticals, Basel, Switzerland, ⁶Novartis Pharma AG, Basel, Switzerland, Basel, Switzerland, ⁷Novartis Pharmaceuticals Corporation, East Hanover, ⁸Novartis, Gueberschwihr, France
Background/Purpose: Ianalumab, an afucosylated mAb, depletes B cells via enhanced antibody (Ab)-dependent cellular cytotoxicity and blocks B cell-activating factor (BAFF): BAFF-receptor (BAFF-R) mediated signals.1 It…
Abstract Number: 2020 • ACR Convergence 2025
Inebilizumab Efficacy and Safety in Patients with Common, Urgent, and Fibrotic Organ Manifestations of IgG4-RD: Subgroup Analyses from the MITIGATE Trial
Arezou Khosroshahi¹, Emma Culver², Wen Zhang³, Kazuichi Okazaki⁴, Yoshiya Tanaka⁵, Matthias Lohr⁶, nicolas schleinitz⁷, Xinxin Dong⁸, Sue Cheng⁸, Daniel Cimbora⁸ and John Stone⁹, ¹Emory University, Atlanta, GA, ²John Radcliffe Hospital; University of Oxford, Oxford, United Kingdom, ³Peking Union Medical College Hospital, Dong Cheng Qu, China (People's Republic), ⁴Kansai Medical University Kori Hospital, Osaka, Japan, ⁵University of Occupational and Environmental Health, Japan, Kitakyushu, Japan, ⁶Karolinska Institutet, Stockholm, Sweden, ⁷Aix Marseille university, AP-HM, Marseille, France, ⁸Amgen, Thousand Oaks, CA, ⁹Massachusetts General Hospital , Harvard Medical School, Concord, MA
Background/Purpose: IgG4-related disease (IgG4-RD) is a progressive, systemic, fibroinflammatory disease characterized by unpredictable and recurring flares, leading to organ damage and decreased quality of life.…
Abstract Number: 1517 • ACR Convergence 2025
The Chinese Experience with Telitacicept in Lupus Nephritis Management: 51-Patient Cohort Analysis on Therapeutic Outcomes and Safety Parameters
Aijing Liu¹, Fei Chang² and Qiuhong Xu¹, ¹Department of Rheumatology and Immunology, The Second Hospital of Hebei Medical University, Shijiazhuang, China (People's Republic), ²Department of Rheumatology and Immunology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China (People's Republic)
Background/Purpose: Lupus nephritis (LN), affects 30%-50% of systemic lupus erythematosus (SLE) patients, a major contributor to SLE-related mortality. Telitacicept, an innovative recombinant fusion protein, disrupts…
Abstract Number: 0907 • ACR Convergence 2025
Cross-Species Cellular Mapping and Humanization of Fcγ Receptors to Advance Antibody Modeling
Karel Van Damme¹, Dorine Sichien², Katrien Van der Borght³, Sofie Van Gassen³, Elisabeth De Leeuw³, Victor Bosteels⁴, Joseph Jorssen⁵, Seppe De Winter⁶, Alan Korman⁷, Fabio Benigni⁸, Davide Corti⁸, Ariane Morel⁹, Eric Vivier⁹, Hamida Hammad³, Dirk Elewaut¹⁰, Fabiane Sonego¹¹, Kader Thiam¹¹, Sofie Voet², bianca Balbino¹² and Bart Lambrecht³, ¹Ghent University, Ghent, ²argenx, Ghent, Belgium, ³Ghent University, Ghent, Belgium, ⁴The Francis Crick Institute, London, United Kingdom, ⁵Liège Université, Liege, Belgium, ⁶KU Leuven, Leuven, Belgium, ⁷Vir Biotechnology, San Francisco, ⁸Vir Biotechnology, Bellinzona, Switzerland, ⁹Innate Pharma, Marseille, France, ¹⁰VIB Center for Inflammation Research, and Ghent University Hospital, Department of Rheumatology, Ghent, Belgium, ¹¹genOway, Lyon, France, ¹²argenx, Gent, Belgium
Background/Purpose: Fc receptors mediate the effector functions of antibodies by linking adaptive and innate immunity. Immunoglobulin G (IgG), the most abundant antibody in circulation and…
Abstract Number: 0135 • ACR Convergence 2025
Rituximab in Antiphospholipid Syndrome: aPL Titer Decline and Clinical Outcomes
Omer Uludag¹, Soner Altın², Gamze Kemec², yasemin yalcinkaya³, Ahmet Gul³, Murat Inanc³ and Bahar Artim Esen⁴, ¹Istanbul University, Istanbul Faculty of Medicine, Division of Rheumatology, Istanbul, Turkey, ²Istanbul University, Istanbul Faculty of Medicine, Department of Internal Medicine, Istanbul, Turkey, ³Istanbul University, Istanbul Faculty of Medicine, Division of Rheumatology, Istanbul, Istanbul, Turkey, ⁴Istanbul University, Istanbul, Istanbul, Turkey
Background/Purpose: Rituximab treatment has been shown to be effective in non-thrombotic manifestations of APS and refractory catastrophic APS (CAPS). However, there are conflicting results regarding…
Abstract Number: 2641 • ACR Convergence 2025
Cizutamig, a BCMA T-cell engager: preclinical to clinical translation of design optimization for the treatment of autoimmune diseases
Ricardo Grieshaber-Bouyer¹, Jamie Haddon², Maria Gabriella Raimondo³, Carlo Tur³, Sebastian Böltz³, Tobias Dashi⁴, Melanie Hagen⁵, Andreas Wirsching³, Tobias Rathe⁴, Xuan Wu⁶, Peter Wung², Francis Kim², Yonghong Zhu⁶, Ken Song², Timothy Lu⁷ and Georg Schett⁸, ¹University Hospital Erlangen, Erlangen, Germany, ²Candid Therapeutics, San Diego, CA, ³Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ⁴Department of Internal Medicine ³- Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ⁵Friedrich-Alexander-University Erlangen-Nuremberg, Department of Internal Medicine ³ - Rheumatology and Immunology, Erlangen, Germany, ⁶EpimAb Biotherapeutics, Shanghai, China (People's Republic), ⁷Candid Therapeutics, San Diego, ⁸Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany
Background/Purpose: Emerging data show the potential of T-cell engagers (TCEs) for deep B cell depletion to treat autoimmune diseases. Cizutamig is a purposefully designed BCMAxCD3…
Abstract Number: 2019 • ACR Convergence 2025
Incidence of Coronavirus Disease 2019 in Participants with IgG4-Related Disease Treated with Inebilizumab in the MITIGATE Study
Arezou Khosroshahi¹, Emma Culver², Wen Zhang³, Kazuichi Okazaki⁴, Yoshiya Tanaka⁵, Matthias Lohr⁶, nicolas schleinitz⁷, Xinxin Dong⁸, Sue Cheng⁸, Daniel Cimbora⁸ and John Stone⁹, ¹Emory University, Atlanta, GA, ²John Radcliffe Hospital; University of Oxford, Oxford, United Kingdom, ³Peking Union Medical College Hospital, Dong Cheng Qu, China (People's Republic), ⁴Kansai Medical University Kori Hospital, Osaka, Japan, ⁵University of Occupational and Environmental Health, Japan, Kitakyushu, Japan, ⁶Karolinska Institutet, Stockholm, Sweden, ⁷Aix Marseille university, AP-HM, Marseille, France, ⁸Amgen, Thousand Oaks, CA, ⁹Massachusetts General Hospital , Harvard Medical School, Concord, MA
Background/Purpose: The potential of B-cell-depleting therapies to diminish humoral responses is recognized, but whether this leads to an increased risk of Coronavirus Disease 2019 (COVID-19)…
Abstract Number: 1198 • ACR Convergence 2025
Induction of stable, GC-free remission in patients with severe, therapy-refractory anti-synthetase syndrome after using the bispecific CD19xCD3 T cell engager blinatumomab
Christina Duesing¹, Ayla Nadja Stuetz², Andrea-Hermina Györfi³, Laura-Marie Lahu⁴, Franca Sophie Deicher⁵, Gamal Chehab⁶, Jutta Richter⁷, Marie Celine van Saan⁸, Bilgesu Safak Tümerdem², Alexandru-Emil Matei⁹, Bjoern Buehring¹⁰, Ricardo Grieshaber-Bouyer¹¹, Melanie Hagen¹², Georg Schett¹³, Wolfgang Merkt¹⁴ and Jörg Distler¹⁵, ¹Klinik für Rheumatologie, Düsseldorf, Germany, ²Department of Rheumatology, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University. Hiller Research Center, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University, Düsseldorf, Nordrhein-Westfalen, Germany, ³Department of Rheumatology, University Hospital Düsseldorf, Medical Faculty of Heinrich Heine University., Düsseldorf, Germany, ⁴Department of Rheumatology, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University. Hiller Research Center, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University, Düsseldorf, Germany, ⁵Uniklinik Düsseldorf, Düsseldorf, Germany, ⁶Policlinic of Rheumatology and Hiller Research Unit Rheumatology, Heinrich-Heine-University, Düsseldorf, Germany, ⁷Clinic for Rheumatology and Hiller Research Unit, Heinrich-Heine-University Duesseldorf, Medical Faculty, Duesseldorf, Germany, Düsseldorf, Germany, ⁸Department of Rheumatology, University Hospital Duesseldorf, Medical Faculty of Heinrich Heine University, Duesseldorf, ⁹Department of Rheumatology, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University. Hiller Research Center, University Hospital Düsseldorf, Medical Faculty of Heinrich-Heine University. Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, and Fraunhofer Cluster of Excellence for Immune Mediated Diseases CIMD, Frankfurt am Main, Germany, Düsseldorf, Germany, ¹⁰Bergisches Rheuma-Zentrum, Wuppertal, Germany, ¹¹University Hospital Erlangen, Erlangen, Germany, ¹²Friedrich-Alexander-University Erlangen-Nuremberg, Department of Internal Medicine ³ - Rheumatology and Immunology, Erlangen, Germany, ¹³Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany, ¹⁴University Hospital Düsseldorf, Düsseldorf, Germany, ¹⁵University Hospital Duesseldorf and HHU, Duesseldorf, Germany
Background/Purpose: Treatment of anti-synthetase syndrome (ASyS) presents clinical challenges: myositis can lead to permanent disability and severe organ involvement is life-threatening.Methods: We treated three patients…
Abstract Number: 0906 • ACR Convergence 2025
Preclinical Characterization of IBI3034, an TACI and BCMA Chimeric Fc Fusion Protein, that Potently Modulates B Lymphocytes and Serum Immunoglobulin for the Treatment of B cell Related Autoimmune Disease
Yao Xiong, Shuaixiang Zhou, Zhimin Zhang, Bin Li, Zhihao Ming, Yuyu Wu, Liu Li, Chang Li, Fenggen Fu, Zhihai Wu, Shun Wang, Guogang Yuan, Yuling Song, Jinyang Li, Huizhong Xiong and Bingliang Chen, Innovent Biologics (Suzhou) Co., Ltd., Suzhou, Jiangsu, China (People's Republic)
Background/Purpose: Dysregulated B-cell activation plays a pivotal role in the pathogenesis of various autoimmune diseases. B-cell activating factor (BAFF) and a proliferation-inducing ligand (APRIL) are…
Abstract Number: 0124 • ACR Convergence 2025
Single-cell atlas reveals the central-and-peripheral immune remodeling mechanism and clinical benefits of talitacicept therapy in patients with primary antiphospholipid syndrome
Haoyu Pan¹, Shiyan Gu¹, Xiaohan Wei², Yuying Fan¹, Jinyi Qian¹, Shuyi Yu¹ and Hui Shi³, ¹Department of Rheumatology and Immunology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China, Shanghai, Shanghai, China (People's Republic), ²Shanghai JiaoTong University, Shanghai, China (People's Republic), ³Shanghai Jiaotong University Affiliated Ruijin Hospital, Shanghai, China (People's Republic)
Background/Purpose: To elucidate the molecular and cellular mechanisms underlying Talitacicept therapy in primary antiphospholipid syndrome (PAPS) patients using integrated single-cell RNA and TCR/BCR profiling of…
Abstract Number: 2577 • ACR Convergence 2025
Duration of SARS-CoV-2 Viral Shedding After Acute Infection in Patients with Rheumatic Diseases Using B Cell Depletion or Tumor Necrosis Factor Inhibitors
Liya Sisay Getachew¹, Xiaosong Wang², Zachary Wallace³, Naomi Patel⁴, Lauren O'Keeffe⁵, Madison Negron⁶, Grace Qian⁵, Alene Saavedra⁵, Kevin Mueller⁵, Natalie Davis⁷, Yijia Li⁸, Manish Choudhary⁵, Julie Boucau³, Brooke Leeman⁵, Gregory Edelstein⁵, Owen Glover³, Yumeko Kawano⁵, Rinki Deo⁵, Caitlin Marino³, Zahra Reynolds³, Karry Su³, Chase Mandell³, Eliza Passell³, Mamadou Barry³, Andrew Alexandrescu³, Dibya Ghimire³, Mriganka Mandal⁹, Tammy Vyas³, Sarah Hammond³, Jatin Vyas³, Jacob Lemieux³, Mark Siedner³, Amy Barczak³, Jonathan Li³ and Jeffrey Sparks¹, ¹Brigham and Women's Hospital, Boston, MA, ²Brigham and Women's Hospital, Natick, MA, ³Massachusetts General Hospital, Boston, ⁴Massachusetts General Hospital, Boston, MA, ⁵Brigham and Women's Hospital, Boston, ⁶Harvard Extension School, Medford, MA, ⁷Brigham and Women's Hospital, Brookline, MA, ⁸University of Pittsburgh, Pittsburgh, ⁹Dana-Farber Cancer Institute, Boston
Background/Purpose: People with rheumatic diseases are at risk for acute and post-acute COVID-19 outcomes in part due to immunosuppressive medications. Those on B-cell depleting therapies…
Abstract Number: 1838 • ACR Convergence 2025
Differential Expression Of Activation Markers On dsDNA-reactive B-cells Between Healthy Subjects And SLE Patients Reveals Unconventional Extrafollicular Activation In SLE
Lars Van Vliet, Annemarie Dorjée, René Toes and Jolien Suurmond, Leiden University Medical Center, Leiden, Netherlands
Background/Purpose: Anti-dsDNA IgG antibodies are a hallmark of systemic lupus erythematosus (SLE), an autoimmune disease characterized by chronic inflammation and multi-organ damage. Evidence suggests that…
Abstract Number: 1189 • ACR Convergence 2025
Clinical Outcomes and Response to SARS-Cov-2 Infection and Vaccination in Ianalumab‑Treated Patients with Autoimmune Diseases
Valerie Devauchelle¹, Swati Ghanshani², CAROLE SIPS³, Rainer Hillenbrand³, Carol Lau⁴, Wolfgang Hueber⁵, Claire Bonal³ and Stephen Oliver⁶, ¹UBO, Brest, France, ²Novartis Healthcare Private Limited, Hyderabad, India, Hyderabad, India, ³Novartis Pharma AG, Basel, Switzerland, Basel, Switzerland, ⁴Novartis Pharmaceuticals Corporation, East Hanover, ⁵Novartis Pharmaceuticals, Basel, Switzerland, ⁶Novartis Pharma AG, Basel, Switzerland
Background/Purpose: Ianalumab, a glycoengineered IgG1 mAb directed against B cell-activating factor (BAFF)-receptor (BAFF-R), targets B cells and their functions via dual mechanism: depletion of B…
Abstract Number: 0905 • ACR Convergence 2025
Development and Characterization of IAR130, a 2+1 Format, CD19 and BCMA Dual Targeting T Cell Engager for Autoimmune Diseases
Jinyang Li, Xiu Han, Yi Wang, Yiyi Li, Zhaoru Ma, Yang Li, Zhimin Zhang, Liu Li, Meng Ni, Jiangkun Bi, Xing Yang, Yao Xiong, Shuaixiang Zhou and Huizhong Xiong, Innovent Biologics (Suzhou) Co., Ltd., Suzhou, Jiangsu, China (People's Republic)
Background/Purpose: Immune reset, achieved through profound and sustained depletion of B cells and/or plasma cells, has demonstrated significant clinical efficacy in patients with severe and…

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