白细胞介素4诱导蛋白1(IL4I1)在免疫调节中的作用研究进展

The role of IL4I1 in immunoregulation: An update

白细胞介素4诱导蛋白1(IL4I1)是一种分泌型氨基酸氧化酶,由抗原提呈细胞产生,可将苯丙氨酸氧化为苯丙酮酸。IL4I1通过抑制T细胞增殖、分化并限制B细胞增殖,发挥免疫抑制作用;参与机体感染防御;作为肿瘤不良预后相关基因,参与肿瘤免疫逃逸;在自身免疫性脱髓鞘疾病中,调节小胶质细胞极化表型,促进髓鞘再生,但具体作用机制尚不明确。我们总结了IL4I1在机体中的免疫调节作用及机制,以期为感染、肿瘤和自身免疫性疾病的治疗提供新思路。

Interleukin-4 induced 1 protein(IL4I1), a secreted amino acid oxidase produced by antigen presenting cells, oxidizes phenylalanine to phenylpyruvate. It has been found that IL4I1 exerts an immunosuppressive function by inhibiting the proliferation and differentiation of T cells as well as limiting the proliferation of B cells. IL4I1 is involved in host defense against infection. As a gene related to poor prognosis in cancers, IL4I1 participates in tumor immune escape. IL4I1 promotes remyelination via regulation of the different phenotypes of microglia in the autoimmune demyelinating diseases, but the detailed mechanism still remains unknown. We summarize the role and mechanism of IL4I1 in the immune regulation to provide new ideas for the treatment of infections, cancers and autoimmune diseases.