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Abstract
Immune checkpoint inhibitors are associated with immune-related adverse events (irAEs), including arthritis (arthritis-irAE). Management of arthritis-irAE is challenging because immunomodulatory therapy for arthritis should not impede antitumor immunity. Understanding of the mechanisms of arthritis-irAE is critical to overcome this challenge, but the pathophysiology remains unknown. Here, we comprehensively analyze peripheral blood and/or synovial fluid samples from 20 patients with arthritis-irAE, and unmask a prominent Th1-CD8+ T cell axis in both blood and inflamed joints. CX3CR1hi CD8+ T cells in blood and CXCR3hi CD8+ T cells in synovial fluid, the most clonally expanded T cells, significantly share TCR repertoires. The migration of blood CX3CR1hi CD8+ T cells into joints is possibly mediated by CXCL9/10/11/16 expressed by myeloid cells. Furthermore, arthritis after combined CTLA-4 and PD-1 inhibitor therapy preferentially has enhanced Th17 and transient Th1/Th17 cell signatures. Our data provide insights into the mechanisms, predictive biomarkers, and therapeutic targets for arthritis-irAE.
Arthritis is the most common rheumatic immune-related adverse event (irAE) occurring in cancer patients receiving immune checkpoint inhibitors. Here the authors study the immune landscape of blood and synovial fluid samples from patients with arthritis-irAE, reporting immunological differences and similarities with classic autoimmune arthritis.
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1 The University of Texas MD Anderson Cancer Center, Section of Rheumatology and Clinical Immunology, Department of General Internal Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
2 The University of Texas MD Anderson Cancer Center, Department of Genomic Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
3 Baylor College of Medicine, Department of General Internal Medicine, Houston, USA (GRID:grid.39382.33) (ISNI:0000 0001 2160 926X)
4 The University of Texas MD Anderson Cancer Center, Department of Immunology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); Georgetown University, Department of Biology, Washington, USA (GRID:grid.213910.8) (ISNI:0000 0001 1955 1644)
5 The University of Texas MD Anderson Cancer Center, Department of Infectious Disease, Infection Control and Employee Health, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
6 The University of Texas MD Anderson Cancer Center, Department of Lymphoma and Myeloma, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
7 The University of Texas MD Anderson Cancer Center, Department of Genitourinary Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
8 The University of Texas MD Anderson Cancer Center, Department of Thoracic Head and Neck Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
9 The University of Texas MD Anderson Cancer Center, Department of Breast Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
10 The University of Texas MD Anderson Cancer Center, Department of Neuro-Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
11 The University of Texas MD Anderson Cancer Center, Department of General Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
12 The University of Texas MD Anderson Cancer Center, Department of Gynecologic Oncology and Reproductive Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
13 The University of Texas MD Anderson Cancer Center, Department of Investigational Cancer Therapeutics, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
14 The University of Texas MD Anderson Cancer Center, Department of Leukemia, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
15 The University of Texas MD Anderson Cancer Center, Section of Rheumatology and Clinical Immunology, Department of General Internal Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); The University of Texas MD Anderson Cancer Center, Department of Melanoma Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); Assiut University, Department of Rheumatology and Rehabilitation, Assiut University Hospitals, Faculty of Medicine, El Fateh, Egypt (GRID:grid.252487.e) (ISNI:0000 0000 8632 679X)
16 The University of Texas MD Anderson Cancer Center, Department of Melanoma Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
17 The University of Texas MD Anderson Cancer Center, Department of Melanoma Medical Oncology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); H. Lee Moffitt Cancer Center and Research Institute, Tampa, USA (GRID:grid.468198.a) (ISNI:0000 0000 9891 5233)
18 The University of Texas MD Anderson Cancer Center, Department of Laboratory Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
19 The University of Texas MD Anderson Cancer Center, Department of Genomic Medicine, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences (GSBS), Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)
20 The University of Texas MD Anderson Cancer Center, Department of Immunology, Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776); The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences (GSBS), Houston, USA (GRID:grid.240145.6) (ISNI:0000 0001 2291 4776)