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白细胞介素(interleukin，IL)-9是一种多来源、多效性的细胞因子，其受体(IL - 9 receptors，IL-9R)亦可在多种细胞上进行表达。二者发生特有异性结合后，可有效介导机体的肿瘤免疫、呼吸系统疾病、自身免疫性疾病和寄生虫感染等多种疾病。近年来关于IL-9的研究在免疫学和免疫病生理学方面取得了突飞猛进的发展，以下将对比作一综述。“,”Interleukin (IL-9) is a kind of multi-source and multi validity cytokine, Its receptor (IL-9 receptors, IL-9R) can also be expressed on a variety of cells. The combination of the two can effectively mediate tumor immunity, respiratory diseases, autoimmune diseases and parasite infection. In recent years, the research on IL-9 has made rapid progress in immunology and immunopathology. It will be reviewed in this article.