SLE患者外周血CD4~+ T淋巴细胞DNA中p16基因启动子区甲基化研究

目的 检测SIJE患者外周血CD4~+T淋巴细胞DNA中p16基因的甲基化状态及其在SLE发病机制中的作用.方法 以Taqman探针为基础的实时定量PCR(Methylight)方法检测28例SLE患者和20例正常人CD4~+T淋巴细胞中p16基因启动子区甲基化状态.结果 SLE患者CD4~+T淋巴细胞的p16基因启动子区甲基化率(35.7%,10/28)高于对照组(10.0%,2/20).两者比较筹异有统计学意义(x~2=4.11,P<0.05).SLE患者疾病严重程度评分与对应的标准甲基化指数无统计学相父性(r_s=-0.29,P>0.05).结论 SLE患者CD4~+T淋巴细胞p16基凶甲基化异常,提示p16基因的高甲基化在SLE的发病中起一定作用.

Methylation state of p16 gene promoter in peripheral CIM~+ T cells of patients with systemic lupus erythematosus

Objective To detect the methylation status of p16 gene promoter in CD4~+ T cells of patients with systemic lupus erythematosus(SEE),and its significance in the pathogenesis of SLE.Methods The pl 6 gene promoter methylation in peripheral CD4~+ T cells was detected with the Taqman probe-based realtime PCR(Methylight)technology in 28 patients with SLE and 20 healthy human controls.Results The methylation rate of p16 gene promoter in peripheral CD4~+ T cells was higher in patients with SLE than that in the controls(35.7%VS 10%,x~2=4.11,P<0.05).There was no correlation between SLE disease activity index (SLEDAI)and the normalized index of methylation(NIM)of p16 gene promoter(r_s=-0.29,P>0.05).Conclusion The methylation status of p16 gene promoter is aberrant in CD4~+ T,:ells of SLE patients,suggesting that the hypermethylation of p16 gene plays a certain role in the pathogenesis of SLE.