梅毒患者外周血树突细胞亚型及其表达不同细胞因子的检测

目的 探讨梅毒患者外周血树突细胞（DC）各亚型及表达不同细胞因子T细胞亚群的频数在梅毒发病机制中的意义。方法 流式细胞仪测定20例梅毒患者治疗前、治疗后和15例正常人外周血DC各亚型及表达不同细胞因子（包括IFN-γ、IL-2、IL-4、IL-10、IL-12）CD4+、CD8+ T细胞亚群的频数。结果 20例梅毒患者外周血髓系DC亚型（CD11c＋）的表达，治疗前、后比较有显著升高（t = 3.339，P ＜ 0.01），治疗前与对照组比较显著升高（P ＜ 0.05）。梅毒患者外周淋巴系DC亚型（CD123＋）的表达，治疗前、治疗后、对照组比较其差异均无统计学意义（P ＞ 0.05）。梅毒患者外周血T细胞亚群胞质内细胞因子IFN-γ的表达，治疗前、后比较有显著升高（t =14.890，P ＜ 0.01），治疗前与对照组比较显著升高（P ＜ 0.01）；梅毒患者外周血T细胞亚群胞质内细胞因子IL-2、IL-4、IL-10、IL-12的表达，IL-2和IL-12治疗前、后比较有显著升高（t = 10.899，4.292，P均 ＜ 0.01），治疗前与对照组比较显著升高（P ＜ 0.05），IL-4和IL-10治疗前与对照组比较显著降低（P ＜ 0.01）。梅毒患者外周血CD11c＋、CD123＋的表达与IFN-γ、IL-12的百分比不存在相关关系（P均 ＞ 0.05）。结论 IFN-γ、IL-2和IL-12可能在梅毒清除过程中发挥免疫调节作用，而IL-4、IL-10起免疫抑制作用。

Detection of peripheral dendritic cell subsets and T cell subpopulations expressing different intracellular cytokines in patients with syphilis

Objective To investigate the role of dendritic cell (DC) subsets and T cell subpopulations expressing different intracellular cytokines in the pathogenesis of syphilis. Methods Flow cytometry was utilized to measure the frequencies of peripheral DC subsets and IFN-γ-, IL-2-, IL-4-, IL-10-expressing peripheral CD4+ and CD8+ T cell subpopulations in 20 patients with syphilis before and after therapy, and in 15 healthy human controls. Results The frequency of CD11c+ DC was significantly lower in pretreated patients than that in treated patients (P<0.01), but higher than that in the normal controls (P<0.05), and the same was true for the frequency of IFN-γ-expressing T cells, IL-2-expressing T cells, and IL-12-expressing T cells. By contrast, a decrease was noticed in the frequency of IL-4-expressing T cells and IL-10-expressing T cells in pretreated patients compared with that in the normal controls. Furthermore, in patients with syphilis, the frequency of CD11c+ and CD123+ DC was unrelated to the percentage of IFN-γ-expressing and IL-12- expressing T cells (both P>0.05). Conclusions IFN-γ, IL-2 and IL-12 may exert an immunoregnlatory effect in the eliminating of Treponema pallidum, whereas IL-4 and IL-10 may perform an imrnunoinhibitory effect.