摘要
目的探讨系统性红斑狼疮(SLE)患者外周血CCR7+CD8+CD45RO+记忆性T细胞对CD4+T细胞的诱导分化作用及其与SLE发病的关系。方法流式细胞仪、实时定量RT-PCR和RNA印迹检测同系CCR7+CD8+CD45RO+T细胞和树突细胞协同刺激CD4+T细胞分泌细胞因子。结果活动期SLE患者CCR7+CD8+CD45RO+记忆性T细胞诱导CD4+T细胞表达Th2类细胞因子:白介素4的表达效率显著高于正常人对照组和非活动期SLE患者组(P<0.01),1型调节性T细胞(Tr1)源性细胞因子:白介素10和转化生长因子β的表达效率均低于正常对照组和非活动期SLE患者组(P<0.01);而活动期和非活动期SLE患者干扰素γ的表达效率显著低于正常人对照组(P<0.01)。结论活动期SLE患者外周血CCR7+中央型记忆性T细胞可与树突细胞相互作用,诱导同系CD4+T细胞向Th2分化,发挥CCR7-CD45RO+效应性记忆性T细胞的功能。
Objective To determine the functions of CCR7+CD8+CD45RO+ T cells on CD4+T cells in systemic lupus erythematosu(SLE).Methods The expres sion of cytokines in CD4+T cells was measured by flow cytometry,real-time qua ntitative reverse transcription polymerase chain reaction and Northern blotting.A chemotaxis assay was used to detect their functions.Results In the case of active SLE,CCR7+CD8+CD45RO+T cells could induce CD4+T cells to express high le vels of Th2-cytokine (IL-4),and low levels of Tr1-cytokines (IL-10 and TGF-β),than those in normal controls and inactive SLE (P < 0.01).The levels of Th1-cyt okine (IFN-γ) were lower in active and inactive SLE than those in normal contro ls (P < 0.01).Conclusions In the case of active SLE,CCR7+ central memory T c ells may interact with dendritic cells,and induce differentiation of syngeneic CD4+T to Th2 cells.
出处
《中华皮肤科杂志》
CAS
CSCD
北大核心
2005年第6期374-376,共3页
Chinese Journal of Dermatology
基金
国家自然科学基金资助项目(39870674)
