Abstracts tagged "Fibroblasts, Synovial"

Abstract Number: 0978 • ACR Convergence 2025
IL-17A+ HLA-DR-CCR6+ regulatory T cells: Dual role in T cell suppression and synovial inflammation in arthritis.
Bennie Heeswijk¹, Margot Bongenaar¹, Nadine Davelaar¹, Pascal de Jong¹, Hannah den Braanker¹, Radboud Dolhain¹ and Erik Lubberts², ¹Erasmus University Medical Center, Rotterdam, the Netherlands, Rotterdam, Netherlands, ²Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands
Background/Purpose: Regulatory T cells (Tregs) are essential for maintaining immune tolerance and limiting excessive immune responses. However, Tregs show high levels of heterogeneity and plasticity,…
Abstract Number: 0919 • ACR Convergence 2025
Proteomic Profiling of Extracellular Vesicles from Synovial Fluid of RA and OA Patients Reveals Cell-type-specific subpopulations and Disease Related Patterns
Stefanie Kurth¹, Andre Tiaden¹, Edveena Hanser¹, Simone Häner¹, Stavros Giaglis¹, Florian Geier¹, Dominik Burri¹, Katarzyna Buczak¹, Ute Heider², Stefan Wild², Yves Acklin¹, Christian Egloff¹ and Diego Kyburz³, ¹University of Basel, Basel, Switzerland, ²Miltenyi Biotec, Bergisch-Gladbach, Germany, ³University Hospital Basel, Basel, Switzerland
Background/Purpose: Extracellular vesicles (EVs) are secreted by virtually all cells and are known to carry bioactive cargo including proteins, RNA, DNA and metabolites. Analysis of…
Abstract Number: 0807 • ACR Convergence 2025
Deciphering Synovitis in Systemic Sclerosis
Celina Geiss¹, Miranda Houtman¹, Camino Calvo Cebrian¹, Raphael Micheroli², Melpomeni Toitou¹, Yannis Djeffal³, Alexandra Khmelevskaya¹, Mojca Frank-Bertoncelj¹, Sam Edalat¹, Thomas Rauer⁴, Kristina Bürki⁵, Chantal Pauli⁶, Michael Bonelli⁷, Thomas Karonitsch⁸, Oliver Distler⁹, Caroline Ospelt¹ and Muriel Elhai¹⁰, ¹Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Zurich, Switzerland, ²University Hospital Zurich, Zurich, Switzerland, ³INSERM, IMRB, Université Paris Est Créteil, Paris, France, ⁴³Department of Traumatology, University Hospital Zurich, University of Zurich, Zurich, Zurich, Switzerland, ⁵Center of Experimental Rheumatology, Department of Rheumatology, University Hospital Zurich, University of Zurich, the LOOP Zurich, Zurich, Switzerland, ⁶Institute for Pathology and Molecular Pathology, University Hospital Zurich, University of Zurich, Zurich, Zurich, Switzerland, ⁷Department of Medicine III, Division of Rheumatology, Medical University Vienna, Vienna, Wien, Austria, ⁸Department of Medicine III, Division of Rheumatology, Medical University Vienna, Vienna, Austria, ⁹Department of Rheumatology, University Hospital Zurich, University of Zurich, Switzerland, Zurich, Switzerland, ¹⁰University Hospital zurich, Zürich, Switzerland
Background/Purpose: Synovitis is a common manifestation of systemic sclerosis (SSc), driving disability and predicting disease progression and mortality. Current immunosuppressive strategies, largely extrapolated from rheumatoid…
Abstract Number: 0799 • ACR Convergence 2025
Citrullination of neutrophil serine proteases enhances proteolytic activity, stability and autoantigenicity in Rheumatoid Arthritis
Mario Navarrete Lagos, Ramiza Zaman, Jun Kim, Jeba Atkia Maisha, Hani El-Gabalawy and Liam O'Neil, University of Manitoba, Winnipeg, MB, Canada
Background/Purpose: In Rheumatoid Arthritis (RA), autoantibodies develop against endogenous proteins containing the amino acid citrulline, which results from a post-translational modification of arginine catalyzed by…
Abstract Number: 0797 • ACR Convergence 2025
Spatial transcriptomics identifies density-sensing fibroblasts in synovial lining
Sonia Presti¹, Kseniia Anufrieva², Ce Gao³, Sean Prell², Philip Blazar², Jeffrey Lange², Morgan Jones², Mihir Wechalekar⁴, Michael Brenner², Ilya Korsunsky⁵, Shideh Kazerounian² and Kevin Wei⁶, ¹Standford University, Stanford, ²Mass General Brigham, Boston, ³Division of Rheumatology, Inflammation and Immunity, DOM, BWH; Harvard Medical School, Boston, MA, ⁴Flinders Medical Centre, Adelaide, Australia, ⁵Division of Rheumatology, Inflammation and Immunity, DOM, BWH; Division of Genetics, DOM, BWH; Harvard Medical School, Boston, MA, ⁶Brigham and Women's Hospital at Harvard Medical School, Boston, MA
Background/Purpose: The synovial lining is crucial for joint homeostasis, forming a barrier and producing lubricants through specialized fibroblasts. These fibroblasts differ from sublining fibroblasts, which…
Abstract Number: 0798 • ACR Convergence 2025
Inhibition of Wnt Signaling Attenuates Inflammatory Arthritis Severity
Alisa Mueller¹, Angela Zou², Lucy-Jayne Marsh³, Samuel Kemble³, Saba Nayar³, Gerald Watts⁴, Cassandra Murphy⁵, Emily Taylor³, Triin Major³, David Gardner⁶, Christopher Buckley⁷, Kevin Wei⁸, Soumya Raychaudhuri⁵, ilya Korsunsky⁵, Andrew Filer⁹, Adam Croft¹⁰ and Michael Brenner¹¹, ¹Stanford University and VA Palo Alto Health Care System, Stanford, CA, ²Harvard Medical School, Boston, MA, ³University of Birmingham, Birmingham, United Kingdom, ⁴Harvard Medical School, Brookline, MA, ⁵Brigham and Women's Hospital, Boston, MA, ⁶University of Birmingham, Havelock North, New Zealand, ⁷University of Oxford, Oxford, United Kingdom, ⁸Brigham and Women's Hospital at Harvard Medical School, Boston, MA, ⁹The University of Birmingham, Birmingham, United Kingdom, ¹⁰University of Birmingham, Hagley, Stourbridge, United Kingdom, ¹¹Brigham and Women's Hospital, Harvard Medical School, Newton, MA
Background/Purpose: Fibroblasts are critical in promoting pathogenic synovial inflammation and bone erosion in rheumatoid arthritis (RA). Moreover, recent studies have pointed to their potential contribution…
Abstract Number: 0472 • ACR Convergence 2025
Detrimental Effects of Umbilical Cord Blood-derived Mesenchymal Stem Cells Intra-articular Injections on Pannus Invasiveness
Sung Eun Kim¹, Hye Lim Kang¹, Min Jung Kim², Hyung-Sik Kim³ and Kichul Shin⁴, ¹Division of Rheumatology, Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea, ²Seoul Metropolitan Government Boramae Medical center, Dongjak-gu, Seoul, South Korea, ³Department of Oral Biochemistry, Pusan National University School of Dentistry, Yangsan, Republic of Korea, ⁴Seoul National University, Seoul, South Korea
Background/Purpose: Studies have shown that mesenchymal stem cell (MSC) infusion ameliorates arthritis in animal models. However, the first-pass effect in the lung has directed attention…
Abstract Number: 2613 • ACR Convergence 2025
Ga-FAPI-04 PET/CT reveals increased fibroblast activation in synovial and enthesial tissues of psoriasis patients with arthralgia and predicts the development of psoriatic arthritis
Giulia Corte¹, Koray Tascilar², armin Atzinger³, Alp Temiz², Melek Yalcin Mutlu⁴, Rita Noversa de Sousa⁵, Maria Gabriella Raimondo⁶, Andreas Ramming⁷, Sara Bayat², Michael Sticherling⁸, Torsten Kuwert⁹, Christian Schmidkonz⁹, Georg Schett¹⁰ and Filippo Fagni¹¹, ¹- Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ²Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Germany, ³Department of Nuclear Medicine, Friedrich-Alexander University (FAU) Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ⁴Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, erlangen, ⁵Department of Internal Medicine ³, Friedrich-Alexander University (FAU) Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, ⁶Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg and Uniklinikum Erlangen, Erlangen, Germany, ⁷Department of Internal Medicine ³, Rheumatology & Immunology, Friedrich-Alexander-University (FAU) & Universitätsklinikum Erlangen, Erlangen, Germany, ⁸Department of Dermatology, Friedrich-Alexander University (FAU) Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, Germany, ⁹Department of Nuclear Medicine, Friedrich-Alexander University (FAU) Erlangen-Nuremberg and Universitätsklinikum Erlangen, Erlangen, Germany, Erlangen, ¹⁰Uniklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, Erlangen, Germany, ¹¹Department of Medicine ³ - Rheumatology and Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg and University Hospital Erlangen, Erlangen, Bayern, Germany
Background/Purpose: 68Ga-FAPI-04 PET/CT reveals fibroblast activation in vivo and is increasingly used to assess rheumatic diseases, including inflammatory arthritides. (1,2) We previously demonstrated that the…
Abstract Number: 0096 • ACR Convergence 2025
GLUT1-Dependent Targeting and Enhanced Selectivity of a Glucose-Methotrexate Conjugate in Rheumatoid Arthritis Fibroblast-Like Synoviocytes
Sebastian Makuch¹, Jacek Polański¹ and Wojciech Tański², ¹Wrocław Medical University, Wrocław, Poland, ²Wrocław University of Science and Technology, Wrocław, Poland
Background/Purpose: Rheumatoid arthritis (RA) is a chronic autoimmune disease where fibroblast-like synoviocytes (FLS) play a central role in joint inflammation and destruction. Methotrexate (MTX), a…
Abstract Number: 2285 • ACR Convergence 2025
Synovium-on-a-chip – Development of a Humanized Rheumatoid Arthritis Model that Mimics Disease and Patient Biological Heterogeneity
Theresa Wampler Muskardin¹, Ruiqi Chen², Yeji Lee³, Azka Ali³, Andrra Nimoni³, Christele Felix³, Hattie Heiland³, Romy Kallas³, Daniel Ramirez⁴, David Mayman³, Timothy Niewold⁵ and Weiqiang Chen⁶, ¹Hospital for Special Surgery and Weill Cornell Medicine, New York, NY, ²New York University - Tandon School of Engineering, New York, NY, ³Hospital for Special Surgery, New York, NY, ⁴Hospital for Special Surgery, Weill Cornell Medicine, New York, NY, ⁵Hospital for Special Surgery, New York, New York, ⁶New York University, Tandon School of Engineering, New York, NY
Background/Purpose: In rheumatoid arthritis (RA), reasons for treatment resistance and alternate strategies that would be more effective in treatment-resistant patients remain unknown. Accurate methodology to…
Abstract Number: 0097 • ACR Convergence 2025
Aberrant histone marks increase the inflammatory phenotype of rheumatoid arthritis fibroblast-like synoviocytes (RA FLS) by suppressing NUB1 induction
Yosuke Ono¹, Camilla R.L. Machado², Eunice Choi¹, Wei Wang¹, David Boyle¹ and Gary Firestein², ¹University of California, San Diego, San Diego, ²University of California, San Diego, San Diego, CA
Background/Purpose: Fibroblast-like synoviocytes (FLS) play a central role in cartilage destruction and cytokine production in rheumatoid arthritis (RA). Neddylation, a post-translational modification involving NEDD8 conjugation,…
Abstract Number: 1801 • ACR Convergence 2025
Matrikine Activation of Synovial Fibroblasts Promotes Monocyte Migration and Stimulates an OA Chondrocyte Phenotype
Richard Loeser¹, Jorge Fernandez Davila¹, Philip Coryell², Susan Chubinskaya³ and Doug Phanstiel⁴, ¹University of North Carolina, Chapel Hill, NC, ²University of North Carolina-Chapel Hill, Chapel Hill, NC, ³University of Texas Medical Branch, Galveston, TX, ⁴University of North Carolina at Chapel Hill, Chapel Hill, NC
Background/Purpose: Protease cleavage of matrix proteins generates matrix fragments including fibronectin fragments (FN-f) found in OA cartilage and synovial fluid. Matrix fragments or “matrikines” activate…
Abstract Number: 0081 • ACR Convergence 2025
Trans-endothelial Trafficking of Fibroblast-like Synoviocytes Amplifies Synovial Inflammation in Rheumatoid Arthritis
Jaeyeon Kim¹, Sanaz Panahandeh², Hieu Nguyen³, Kainat Mian⁴, Hadijat Makinde⁴, Kyoung Jae Won⁵, Arminja Kettenbach³, Harris R Perlman⁴, Costantino Pitzalis⁶ and Nunzio Bottini⁷, ¹Cedars Sinai Medical Center, Los Angeles, CA, ²Cedars-Sinai Medical Center, Los Angeles, ³Geisel School of Medicine at Dartmouth, Lebanon, NH, ⁴Northwestern University, Chicago, IL, ⁵Cedars-Sinai Medical Center, Los Angeles, CA, ⁶QMUL, Bromley Kent, United Kingdom, ⁷Cedars Sinai Medical Center, Beverly Hills, CA
Background/Purpose: The discovery of circulating fibroblast-like synoviocyte (FLS), known as PRIME cells, in RA patients suggests that synovial FLS may enter the circulation through blood…
Abstract Number: 1787 • ACR Convergence 2025
Spatial and Quantitative Semiautomated Image Analysis of Synovial Biopsies Studied Using a Novel High-Plex Immunofluorescence Platform
Estefania Quesada-Masachs¹, Luis Peñaranda Bolaño¹, Aakriti Arora², Jessica Murillo-Saich³, Edward Lo⁴, Tad George⁴, Daniel Tanoeihusada⁴, Sara McArdle⁵ and Monica Guma⁶, ¹University of Miami, Miami, FL, ²University of Miami / Jackson Memorial Hospital, Miami, FL, ³University of California, San Diego, San Diego, CA, ⁴RareCyte, Seattle, WA, ⁵La Jolla Institute for Immunology, La Jolla, CA, ⁶University of California San Diego, San Diego, CA
Background/Purpose: Although not part of the formal ACR criteria for RA, PsA, or OA, synovial pathology can be a helpful tool in clinical practice. Histopathologic…
Abstract Number: 0075 • ACR Convergence 2025
Impact of CXCL2 and IL-11 from Rheumatoid Arthritis Synovial Fibroblasts on Angiogenesis and Endothelial Cell Network Formation
Elena Neumann¹, Frederik Loetfering², Paula Welbrink³, Corinna Heck³, Daria Kuersammer³, Klaus Frommer¹, Stefan Rehart⁴ and Ulf Müller-Ladner¹, ¹Dept. of Rheumatology and Clinical Immunology, Campus Kerckhoff, Bad Nauheim, Justus-Liebig-University, Germany, Bad Nauheim, Hessen, Germany, ²Justus Liebig University Giessen, Campus Kerckhoff, Bad Nauheim, ³Justus-Liebig-Universität Gießen, Campus Kerckhoff, Bad Nauheim, Germany, ⁴Agaplesion Markus Hospital, Frankfurt, Hessen, Germany
Background/Purpose: In rheumatoid arthritis (RA), hypervascularization contributes to synovial inflammation. RA synovial fibroblasts (RASF) contribute to cartilage and bone erosion but also promote angiogenesis. Activated…

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