microRNA(miRNAs,miRs)是一组近几年发现的、不编码蛋白质的单链小分子RNA。其在疾病发生发展过程中的作用是目前研究的热点。miRNA在免疫系统中的作用已经被广泛的研究,其不仅参与免疫系统的发生发展,而且在介导免疫系统抵抗微生物入侵机体方面起重要的作用。miR-155是免疫系统最主要的miRNA之一,其在活化的各种免疫细胞中表达普遍升高,是参与天然免疫应答和特异性免疫应答的最重 MicroRNAs (miRNAs, miRs) are a group of single-stranded small-molecule RNAs that have not been encoded in recent years. Its role in the development of the disease is currently the focus of research. The role of miRNA in the immune system has been extensively studied. It not only participates in the development of the immune system, but also plays an important role in mediating the immune system against microorganisms invading the body. miR-155, one of the most important miRNAs in the immune system, is generally elevated in various activated immune cells and is the most involved in innate and specific immune responses