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Vanni A, Mazzoni A, Semeraro R, Capone M, Maschmeyer P, Lamacchia G, Salvati L, Carnasciali A, Farahvachi P, Giani T, Simonini G, Filocamo G, Romano M, Liotta F, Mashreghi MF, Cosmi L, Cimaz R, Magi A, Maggi L, Annunziato F. Clonally expanded PD-1-expressing T cells are enriched in synovial fluid of juvenile idiopathic arthritis patients. Eur J Immunol 2023; 53:e2250162. [PMID: 37086046 DOI: 10.1002/eji.202250162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 03/23/2023] [Accepted: 04/17/2023] [Indexed: 04/23/2023]
Abstract
Juvenile idiopathic arthritis (JIA) is the most common chronic rheumatic condition in childhood. The disease etiology remains largely unknown; however, a key role in JIA pathogenesis is surely mediated by T cells. T-lymphocytes activity is controlled via signals, known as immune checkpoints. Delivering an inhibitory signal or blocking a stimulatory signal to achieve immune suppression is critical in autoimmune diseases. However, the role of immune checkpoints in chronic inflammation and autoimmunity must still be deciphered. In this study, we investigated at the single-cell level the feature of T cells in JIA chronic inflammation, both at the transcriptome level via single-cell RNA sequencing and at the protein level by flow cytometry. We found that despite the heterogeneity in the composition of synovial CD4+ and CD8+ T cells, those characterized by PD-1 expression were clonally expanded tissue-resident memory (Trm)-like cells and displayed the highest proinflammatory capacity, suggesting their active contribution in sustaining chronic inflammation in situ. Our data support the concept that novel therapeutic strategies targeting PD-1 may be effective in the treatment of JIA. With this approach, it may become possible to target overactive T cells regardless of their cytokine production profile.
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Affiliation(s)
- Anna Vanni
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Alessio Mazzoni
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
- Flow Cytometry Diagnostic Center and Immunotherapy, Careggi University Hospital, Florence, Tuscany, Italy
| | - Roberto Semeraro
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Manuela Capone
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Patrick Maschmeyer
- Institute of Health (BIH) at Charité, Universitätsmedizin Berlin, Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Institute for Medical Systems Biology (BIMSB), Berlin, Berlin, Germany
- Department of Hematology, Oncology and Cancer Immunology, Charité-Universitätsmedizin Berlin, Berlin, Berlin, Germany
| | - Giulia Lamacchia
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Lorenzo Salvati
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Alberto Carnasciali
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Parham Farahvachi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | | | | | - Giovanni Filocamo
- Pediatric Rheumatology, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milano IT and University of Milan, Milan, Lombardy, Italy
| | - Micol Romano
- University of Western Ontario, London, Ontario, Canada
| | - Francesco Liotta
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
- Immunology and Cell Therapy Unit, Careggi University Hospital, Florence, Tuscany, Italy
| | - Mir-Farzin Mashreghi
- Deutsches Rheuma-Forschungszentrum (DRFZ), Institute of the Leibniz Association, Berlin, Berlin, Germany
| | - Lorenzo Cosmi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
- Immunoallergology Unit, Careggi University Hospital, Florence, Tuscany, Italy
| | - Rolando Cimaz
- Department of Clinical Sciences and Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, University of Milan, Milan, Lombardy, Italy
| | - Alberto Magi
- Department of Information Engineering, University of Florence, Florence, Tuscany, Italy
| | - Laura Maggi
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
| | - Francesco Annunziato
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Tuscany, Italy
- Flow Cytometry Diagnostic Center and Immunotherapy, Careggi University Hospital, Florence, Tuscany, Italy
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