1. Single cell immunoprofile of synovial fluid in rheumatoid arthritis with TNF/JAK inhibitor treatment.
- Author
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Xia X, He C, Xue Z, Wang Y, Qin Y, Ren Z, Huang Y, Luo H, Chen HN, Zhang WH, Huang LB, Shi Y, Bai Y, Cai B, Wang L, Zhang F, Qian M, Zhang W, Shu Y, Yin G, Xu H, and Xie Q
- Subjects
- Humans, Animals, Mice, Piperidines pharmacology, Piperidines therapeutic use, Macrophages metabolism, Macrophages immunology, Male, Arthritis, Experimental immunology, Arthritis, Experimental metabolism, Female, CD4-Positive T-Lymphocytes immunology, CD4-Positive T-Lymphocytes metabolism, Antirheumatic Agents therapeutic use, Antirheumatic Agents pharmacology, Synoviocytes metabolism, Synoviocytes drug effects, Synoviocytes immunology, Mice, Inbred C57BL, Chemokine CXCL13 metabolism, Arthritis, Rheumatoid immunology, Arthritis, Rheumatoid metabolism, Arthritis, Rheumatoid drug therapy, Arthritis, Rheumatoid pathology, Synovial Fluid metabolism, Synovial Fluid immunology, Adalimumab therapeutic use, Adalimumab pharmacology, Janus Kinase Inhibitors pharmacology, Janus Kinase Inhibitors therapeutic use, Single-Cell Analysis, Tumor Necrosis Factor-alpha metabolism, Pyrimidines pharmacology, Pyrimidines therapeutic use
- Abstract
Numerous patients with rheumatoid arthritis (RA) manifest severe syndromes, including elevated synovial fluid volumes (SF) with abundant immune cells, which can be controlled by TNF/JAK inhibitors. Here, we apply single-cell RNA sequencing (scRNA-seq) and subsequent validations in SF from RA patients. These analyses of synovial tissue show reduced density of SF-derived pathogenic cells (e.g., SPP1
+ macrophages and CXCL13+ CD4+ T cells), altered gene expression (e.g., SPP1 and STAT1), molecular pathway changes (e.g., JAK/STAT), and cell-cell communications in drug-specific manners in samples from patients pre-/post-treated with adalimumab/tofacitinib. Particularly, SPP1+ macrophages exhibit pronounced communication with CXCL13+ CD4+ T cells, which are abolished after treatment and correlate with treatment efficacy. These pathogenic cell types alone or in combination can augment inflammation of fibroblast-like synoviocytes in vitro, while conditional Spp1 knocking-out reduces RA-related cytokine expression in collagen-induced arthritis mice models. Our study shows the functional role of SF-derived pathogenic cells in progression and drug-specific treatment outcomes in RA., Competing Interests: Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)- Published
- 2025
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