节点文献
系统性红斑狼疮患者DNA甲基化状态与趋化因子受体表达水平的研究
Studies on p16 Gene DNA Promotor Methylation and the Expression of Chemokine Receptors in Patients with SLE
【作者】 李遇梅；
【作者基本信息】 中国协和医科大学 ， 皮肤病与性病学， 2005， 博士
【摘要】 目的 探讨系统性红斑狼疮(SLE)患者中p16基因启动子甲基化状态及其在发病机制中的作用。 方法 检测45例SLE患者血浆DNA甲基化状态、72例SLE患者全血细胞DNA甲基化状态，并以20名健康对照者血浆和全血细胞作为对照。应用甲基化特异PCR(MSP)方法检测p16基因启动子区甲基化状态，其原理为：DNA经亚硫酸氢钠修饰后，p16基因启动子区含CpG区域可以用PCR进行扩增。对扩增结果与患者疾病活动性、临床表现及常规实验室检查结果之间的关联进行分析。 结果 1、SLE患者血浆DNA中p16基因启动子呈现高甲基化状态： (1)SLE组中p16基因启动子呈甲基化状态者占64.44％(29／45)，而健康对照组中只有1名检测到p16基因甲基化(1／20，5％)，两组间差异具有统计学意义(X~2=19.687~b，p＜0.001；OR=34.44；95％CI[19.25～49.63])。活动期SLE组p16基因呈甲基化状态者所占比率83.33％(20／24)比非活动期SLE组42.85％(9／21)高，差异也有明显统计学意义(x~2=8.008~b；P=0.005，＜0.01；OR=6.67)。 (2)初发SLE组p16基因启动子呈甲基化状态者所占比例(71.43％，15／21)，与复发SLE组(58.33％)相比差异没有统计学意义(p=0.371)。
【Abstract】 Objectives:To investigate the state of p16 gene DNA methylation in plasma from the patients with Systemic Lupus Erythematosus (SLE) and its clinical. Materials and Methods:The methylation state of p16 gene promoter was measured by methylation specific PCR (MSP). A region containing CpG sites in p16 gene promoter was amplified by strand-specific polymerase chain reaction (PCR) after sodium bisulfite treatment.72 SLE cases and 20 healthy controls were enrolled. The state of DNA methylation in plasma and blood cells was detected and the corresponding clinical records were analyzed.Results:1、 p16 gene hypermethylation in SLE patients was showen by plasma DNA detection.(1)There was a significant difference between SLE patients(29/45, 64.44%) and healthy individuals(1/20, 5%) (x~2=19.687~b; p=0, p<0.001; OR=34.44, 95%CI [19.25 ~ 49.63]) .It was found that the rate of DNA hypermethylation in active SLE patients was higher (20/24,83.33%) than that in inactive SLE patients (9/21,42.85%) (x~2= 8.008~b; P=0.005, <0.01; OR=6.67; 95%CI [2.05 ~ 11.29]). Only one healthy individual was detected DNA hyermethylation in plasma.