AIRE通过调控Notch1表达影响CD4~+CD25~+Treg的作用及其机制

目的：研究AIRE基因是否可通过调控Notch1的表达而影响CD4+CD25+Treg细胞的诱导及功能，探讨AIRE在外周免疫耐受中的作用机制。 方法：将RAW264.7细胞分为转染组和未转染组,采用脂质体法将pEGFPC3-AIRE质粒转入RAW264.7细胞， 采用RT-PCR法检测各组AIRE mRNA的表达及Notch1 mRNA表达的变化。 将RAW264.7细胞分为转染组、转染并经Notch1抗体阻断组、 阴性对照组及未转染并经Notch1抗体阻断组,分别采用FACS法及RT-PCR法检测各组RAW264.7细胞对CD4+CD25+Treg细胞数量及Foxp3 mRNA 表达的影响。 结果： 质粒成功转入RAW264.7细胞内。 AIRE转染组较未转染组Notch1 mRNA表达增加。 AIRE转染组较未转染组CD4+CD25+Treg细胞的数量及功能相关基因Foxp3 mRNA的表达水平均增加，经Notch1抗体阻断后， AIRE转染组与未转染组CD4+CD25+Treg细胞的数量及功能均较对照组降低。 结论：AIRE可能通过上调RAW264.7细胞上Notch1的表达进而影响CD4+CD25+Treg细胞的诱导产生及功能,从而在维持外周免疫耐受方面发挥一定的作用。

Effect of AIRE on CD4~+CD25~+Treg by regulating Notch1 expression and mechanism

Objective To study the function of AIRE on inducement and function of the CD4+CD25+Treg cells by regulating Notch1 expression,and discuss the mechanism of AIRE in peripheral immune tolerance.Methods RAW264.7 cells were divided into transfected group and untransfected group,PEGFPC3-AIRE plasmid was transfected with liposome,RT-PCR was used to detect the expressions of AIRE mRNA and Notch1 mRNA in every group.RAW264.7 cells were divided into transfected group,untransfected group,transfected and anti-Notch1 bl...