支气管哮喘患儿外周血Th17和Th9细胞及其细胞因子的表达及临床意义研究

摘要

目的 检测儿童支气管哮喘患者T细胞17(T h17)、外周血辅助性T细胞9(T h9)的比例及血清中白细胞介素-17(IL-17)、白细胞介素-9(IL-9)和总Ig E的表达,探讨其在儿童支气管哮喘发病中的作用及临床意义.方法 选取46例哮喘患儿,分为哮喘发作组(26例)、哮喘缓解组(20例),并设健康对照组(20例).采用流式细胞术分别检测3组外周血中T h17细胞和Th9细胞的比例;应用酶联免疫吸附试验(ELISA)检测3组儿童血清中IL-17和IL-9的水平;应用特定蛋白分析仪检测3组儿童血清中总Ig E的水平.结果 与哮喘缓解组、健康对照组相比,哮喘发作组外周血T h17和T h9细胞比例较高,差异有统计学意义(P<0.05).与健康对照组相比,哮喘缓解组外周血Th17和Th9细胞比例较高,比较差异有统计学意义(P<0.05).与哮喘缓解组、健康对照组相比,哮喘发作组血清中IL-17、IL-9和总Ig E水平较高,差异有统计学意义(P<0.05).与健康对照组相比,哮喘缓解组血清中IL-17、IL-9和总Ig E水平较高,差异有统计学意义(P<0.05).相关性分析结果表明,支气管哮喘患儿血清中IL-17、IL-9与总Ig E水平均呈正相关(r值分别为0.717、0.491、0.786,P<0.05).结论 支气管哮喘患儿外周血T h17和T h9细胞及其细胞因子在儿童支气管哮喘发病中发挥重要作用,并与哮喘的严重程度呈正相关.%Objective To detect the levels of helper T cells (Th) 17 and Th9 cells in the peripheral blood of patients with pedi-atric bronchial asthma and the expression of interleukin 17 (IL-17) ,IL-9 and total IgE in serum ,and to discuss their effect and clini-cal significance in pathogenesis of pediatric asthma .Methods A total of 46 children with bronchial asthma ,including asthma attack group (n=26) and asthma remission group (n=20) were selected .Healthy children were selected as healthy control group (n=20) .Flow cytometry was used to detect the percentages of Th17 and Th9 cells in the peripheral blood .The levels of IL-17 and IL-9 in serum were measured by enzyme-linked immunosorbent assay (ELISA) .Serum total IgE levels were measured by the specific protein analyzer .Results The percentages of Th17 and Th9 cells in the peripheral blood were significantly higher in asthmatic group compared with remission group and healthy control group (P<0 .05) .The percentages of Th17 and Th9 cells in the periph-eral blood was significantly higher in remission group compared with healthy control group (P<0 .05) .The levels of IL-17 ,IL-9 and total IgE in serum were significantly higher in asthmatic group compared with remission group and healthy control group (P<0 .05) .The levels of IL-17 ,IL-9 and total IgE in serum were significantly higher in remission group compared with healthy control group (P<0 .05) .The levels of IL-17 and IL-9 in serum of asthmatic children were positively correlated with total IgE levels (P<0 .05) .The correlation analysis results showed that the levels of IL-17 ,IL-9 and total IgE in serum of patients with pediatric bron-chial asthma have a positive correlation .(r=0 .717 ,0 .491 ,0 .786 ,P<0 .05) .Conclusion Th17 ,Th9 cells and their cytokines in pe-ripheral blood of patients with pediatric bronchial asthma play important roles in the pathogenesis of asthma and are positively cor-related with the severity of asthma .