Objective To investigate the expressions of chemokine receptors and interleukin （IL） receptors on the peripheral blood mononuclear cells （PBMCs） from systemic lupus erythematosus （SLE） patients and their correlations with clinical features as well as SLE disease activity index （SLEDAI）. Methods The mRNA expressions of chemokine receptors and IL receptors on PBMCs of 93 SLE patients and 30 healthy controls were detected by reverse transcription-polymerase chain reaction, including CCR2, CCR3, CCR4, CCR5, CCR6, CCR8, CXCR3, CXCR5, CX3CR1, XCR1, IL-4R, and IL-10R. The clinical features of SLE patients were recorded. The correlations of chemokine receptors and IL receptors mRNA expressions with clinical features as well as SLEDAI were assayed using linear regression analysis. Results The level of CCR5 mRNA in SLE patients （including active and inactive SLE） was signifi- cantly higher than that in healthy controls （P〈0.05）, and there was no significant difference between active and inactive patients in this respect （P〉0.05）. CX3CR1 mRNA expression significantly increased from healthy control to inactive SLE to active SLE in sequence. The others （except for CCR8, CXCR3, and IL-1 OR） in active SLE patients weresignificantly higher than those in both inactive SLE patients and healthy controls （all P〈0.05）. There were positive correlations between SLEDAI and CCR2 （r=0.424, t=4.313, P〈0.001）, CCR3 （r=0.518, t=5.410, P〈0.001）, CCR4 （r=0.376, t=3.851, P〈0.001）, CCR6 （r=0.457, t=4.513,P〈0.001）, CXCR5 （r=0.455, t=4.629, P〈0.001）, CX3CR1 （r=0.44-5, t=4.523, P〈0.001）, as well as XCRI （r=0.540, t=5.445, P〈0.001）. And CCR5 mRNA expression level was positively correlated with IL-4R mRNA （r=0.313, t=2.353, P〈0.05）. The patients with myositis and cutaneous vasculitis simultaneously showed lower levels of CCR5 and CX3CRI, and CCR5 expression was negatively correlated with the scores of SLEDAI in SLE cases accompanied by photosensitivity （r=0.
Yu-mei LiZhi-qiang ChenXu YaoAi-zhen YangAn-sheng LiDong-ming LiuJuan-qin Gong
目的:应用两种不同方法检测系统性红斑狼疮(SLE)患者CD4^+T细胞p16基因甲基化状态,比较两种检测方法的差异。方法:采用以Taqman探针为基础的MSP法(方法1)和以SYBR Green Ⅰ为基础的MSP法(方法2)分别检测40例SLE患者和20例正常人CD4^+T细胞中p16基因启动子区甲基化状态。结果:Taqman探针方法的结果为:SLE患者CD4^+T细胞p16基因甲基化阳性率(35.7%,10/28)高于对照组(10%,2/20),两者比较差异有统计学意义(x^2=4.11,P<0.05)。SYBR Green Ⅰ方法的结果为:患者组和对照组的CD4^+T细胞的p16基因均呈高甲基化状态,应用t检验分析发现P>0.05,二者无统计学差异。结论:Taqman探针法消除了引物二聚体和非特异性扩增对试验结果的影响,提高了结果的特异性和准确性,被证明是进行DNA甲基化状态检测的可靠方法。
