Abstract
Abstract The immune checkpoint inhibition therapy induces various immune related adverse events (irAEs). The immunological basis of irAEs remains unclear. We recruited a cohort of patients with inflammatory arthritis irAE (IA-irAE), the most common form of rheumatic irAEs, together with matched patients with conventional rheumatoid arthritis (RA) and cancer patients without irAEs. Comprehensive clinical and immunological investigations reveal an imbalance of T cell exhaustion and senescence in IA-irAE patients, and immunological similarities between IA-irAE patients and seronegative RA patients. These data suggest that IA-irAE and seronegative RA may have shared immunological mechanisms. Thus, our study identifies potential immunological underpinnings of IA-irAE and the relationship between IA-irAE and conventional RA. The results may have implications for managing irAE and seronegative RA patients. Supported byR01AR0077518 Arthritis National Research Foundation
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