Several microRNAs have been identified that affect lymphocyte effector function and contribute to autoimmune inflammatory disease. Here Youcun Qian and his colleagues find that interleukin-17 (IL-17) suppresses miR-23b expression in nonimmune cells present in inflammatory lesions from individuals with rheumatoid arthritis, systemic lupus erythematosus or multiple sclerosis and in the respective mouse models. MiR-23b targets several signaling molecules downstream of IL-17, TNF-α and IL-1β signaling, thereby suppressing proinflammatory cytokine expression and inhibitng autoimmune pathogenesis in vivo.
- Shu Zhu
- Wen Pan
- Youcun Qian