癫癎患儿外周血中调节性T细胞的变化及其临床意义

Changes of regulatory T cells in the peripheral blood of children with epilepsy

摘要:

目的：研究CD4+ CD25+ Foxp3+ 调节性T细胞（Treg细胞）在癫癎患儿外周血的表达水平，探讨其在癫癎发病机制中的作用。方法：采用流式细胞术分别检测41例癫癎患儿和38例健康儿童外周血Treg细胞占CD4+ T细胞的比例，及CD4+ T细胞、CD8+ T细胞、自然杀伤细胞（NK）、B细胞分别占淋巴细胞的比例。结果：癫癎组患儿外周血Treg细胞比例、CD4+ T细胞比例、CD4+ /CD8+ 比值分别为（2.4±0.5）%、（35±5）%、1.32±0.24，较对照组的（6.1±1.2）%、（38±4）%、1.60±0.24显著降低（P<0.05）；而癫癎组CD8+ T细胞比例、NK细胞比例、B淋巴细胞比例分别为（27±3）%、（11.1±5.1）%、（24±9）%，较对照组的（24±3）%、（8.5±1.9）%、(16±5)%显著升高（P<0.05）。结论：癫癎患儿外周血中存在 Treg 细胞比例异常，提示免疫机制可能参与了癫癎的发生和发展。

Abstract:

OBJECTIVE: To study the levels of CD4+ CD25+ Foxp3+ regulatory T cells (Tregs) in the peripheral blood of children with epilepsy and the roles of Tregs in the pathogenesis of epilepsy. METHODS: Forty-one children with epilepsy and thirty-eight healthy children were enrolled. The percentage of CD4+ CD25+ Foxp3+ Tregs in CD4+ T cells and the percentages of CD4+ T cells, CD8+ T cells, nature killer (NK) cells and B cells in lymphocytes were evaluated by flow cytometry. RESULTS: The percentages of peripheral blood CD4+ CD25+ Foxp3+ Tregs and CD4+ T cells and the ratio of CD4+ T cells to CD8+ T cells in epileptic children were (2.4±0.5)%, (35±5)% and 1.32±0.24 respectively, which were significantly lower than those in healthy children ［(6.1±1.2)%, (38±4)% and 1.60±0.24 respectively; P<0.05］. In contrast, the percentages of CD8+ T cells, NK cells and B cells in lymphocytes in epileptic children were significantly higher than those in healthy children［(27±3)% vs (24±3)%, (11.1±5.1)% vs (8.5±1.9)% and (24±9)% vs (16±5)% respectively; P<0.05］. CONCLUSIONS: The abnormal percentage of CD4+ CD25+ Foxp3+ Tregs in the peripheral blood may be involved in the pathogenesis of epilepsy.