中文摘要：

目的研究干扰素调节因子（IRF）家族中IRF1、IRF4、IRF8基因的实时定量表达水平与系统性红斑狼疮（SLE）的关联性。方法收集45例SLE患者与37名正常对照人群的临床资料，取外周血抽提总RNA并反转录为cDNA．以实时荧光定量聚合酶链反应（PCR）方法在ABI PRISM 7900HT实时定量PCR仪上检测患者组和对照组的IRF1、IRF4、IRF8的mRNA定量表达水平（以-△△Ct值表示）的差异。结果正常人外周血IRF1 mRNA、IRF4 mRNA、IRF8 mRNA的表达分别是一3．90±0．19、-8．04±0．25和3．60±0．15。与正常人相比，SLE患者组IRF1 mRNA表达水平差异无统计学意义（P〉0．05），而IRF4 mRNA的表达明显增高（-8．82±0．18，P=0．011）、IRF8 mRNA表达低于正常人（3．09±0．13，P=0．012）。结论SLE患者外周血存在IRF表达异常。

英文摘要：

Objective To observe whether the expression of interferon-regulatory factor genes are related to systemic lupus erythematosus （SLE）. Methods The clinical data of 45 SLE patients and 37 normal controls were collected. Total RNA of peripheral blood was extracted and transcripted into cDNA. Sybr green dye based real-time quantitative PCR method was used to compare the expression （indicated as -△△Ct value） of IRF1, IRF4, IRF8 in patients with SLE and those in the controls. Results The levels of IRF1, IRF4 and IRF8 mRNA were -3.90±0.19, -8.04±0.25 and 3.60±0.15 respectively in normal controls. In SLE patients, IRF4 mRNA expression was -8.82±0.18, higher than that in normal （P=0.011）. But IRF8 mRNA expression was 3.09±0.13, lower than that in normal （P=-0.012）. Conclusion Abnormal IRF mRNA expression is found in the peripheral blood of SLE patients. IRFs may play roles in the pathogenesis of SLE by affecting the differentiation of Th cells.