Distinct synovial tissue macrophage subsets regulate inflammation and remission in rheumatoid arthritis - PubMed (original) (raw)
. 2020 Aug;26(8):1295-1306.
doi: 10.1038/s41591-020-0939-8. Epub 2020 Jun 29.
Stefano Alivernini 1 2 3 4, Aziza Elmesmari # 5 6, Samuel Finlay # 5 6, Barbara Tolusso 7, Maria Rita Gigante 7, Luca Petricca 7, Clara Di Mario 8, Laura Bui 9, Simone Perniola 8, Moustafa Attar 10, Marco Gessi 9, Anna Laura Fedele 7, Sabarinadh Chilaka 6, Domenico Somma 6, Stephen N Sansom 5 10, Andrew Filer 5 11 12, Charles McSharry 6, Neal L Millar 6, Kristina Kirschner 13, Alessandra Nerviani 14, Myles J Lewis 14, Costantino Pitzalis 14, Andrew R Clark 5 11, Gianfranco Ferraccioli 8, Irina Udalova 5 10, Christopher D Buckley 5 10 11 12, Elisa Gremese 5 7 8, Iain B McInnes 5 6, Thomas D Otto 15 16, Mariola Kurowska-Stolarska 17 18
Affiliations
- PMID: 32601335
- DOI: 10.1038/s41591-020-0939-8
Free article
Distinct synovial tissue macrophage subsets regulate inflammation and remission in rheumatoid arthritis
Stefano Alivernini et al. Nat Med. 2020 Aug.
Free article
Abstract
Immune-regulatory mechanisms of drug-free remission in rheumatoid arthritis (RA) are unknown. We hypothesized that synovial tissue macrophages (STM), which persist in remission, contribute to joint homeostasis. We used single-cell transcriptomics to profile 32,000 STMs and identified phenotypic changes in patients with early/active RA, treatment-refractory/active RA and RA in sustained remission. Each clinical state was characterized by different frequencies of nine discrete phenotypic clusters within four distinct STM subpopulations with diverse homeostatic, regulatory and inflammatory functions. This cellular atlas, combined with deep-phenotypic, spatial and functional analyses of synovial biopsy fluorescent activated cell sorted STMs, revealed two STM subpopulations (MerTKposTREM2high and MerTKposLYVE1pos) with unique remission transcriptomic signatures enriched in negative regulators of inflammation. These STMs were potent producers of inflammation-resolving lipid mediators and induced the repair response of synovial fibroblasts in vitro. A low proportion of MerTKpos STMs in remission was associated with increased risk of disease flare after treatment cessation. Therapeutic modulation of MerTKpos STM subpopulations could therefore be a potential treatment strategy for RA.
Comment in
- Synovial macrophage populations linked to RA remission.
McHugh J. McHugh J. Nat Rev Rheumatol. 2020 Sep;16(9):471. doi: 10.1038/s41584-020-0481-6. Nat Rev Rheumatol. 2020. PMID: 32704079 No abstract available.
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References
- Alivernini, S. et al. Synovial features of patients with rheumatoid arthritis and psoriatic arthritis in clinical and ultrasound remission differ under anti-TNF therapy: a clue to interpret different chances of relapse after clinical remission? Ann. Rheum. Dis. 76, 1228–1336 (2017).
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