【摘要】 目的探讨屋尘螨变应原特异性免疫治疗(SIT)对变应性哮喘患儿预后的影响。方法选择尘螨变应原皮试阳性的过敏性支气管哮喘患者42例,进行SIT治疗1年,于屋尘螨变应原疫苗皮下注射治疗前及疗程结束后分别取外周血,测定外周血清IL-4、IFN-γ水平及检测肺功能。选择同期在我院哮喘专科门诊就诊,确诊为儿童哮喘、尘螨变应原皮试阳性患儿23例作为对照组。结果治疗1年后,SIT组儿童血清IL-4水平下降、IFN-γ水平及IFN-γ/IL-4升高(P<0.05),肺功能指标FVC、pre-FEV1%、pre-PEF%改善明显(P<0.05);而对照组儿童IFN-γ水平及IFN-γ/IL-4升高(P<0.05),血清IL-4水平较治疗前无明显下降(P>0.05),肺功能指标FVC、pre-FEV1%、pre-PEF%改善不明显(P>0.05);组间比较,两组患儿治疗前肺功能指标FVC、pre-FEV1%、pre-PEF%差异无显著性,治疗1年后,SIT组pre-FEV1%、pre-PEF%显著优于对照组。结论SIT能够调节体内Th1/Th2细胞的平衡,维持哮喘患儿良好的肺功能,SIT可能对哮喘儿童气道重塑有一定抑制作用。更多还原

【Abstract】 Objective To investigate the effects of Dermatophagoides pteronyssinus allergen-specific immunotherapy (SIT) on the prognosis of asthmatic children. Metheds Sixty-five children with established diagnosis of allergic asthma to dust mite were enrolled in this study, of whom 42 children received treatment with standardized SIT for 12 month and the other 23 served as the control group with inhaled corticosteroids according to Global Initiative for Asthma (GINA). The serum levels of interleukin-4 (IL-4) and interferon-γ (IFN-γ) were detected and the pulmonary functions examined before and after the one-year treatment in all the patients. Results After the one-year treatment with SIT, the asthmatic children showed obviously reduced serum levels of IL-4, significantly increased IFN-γ levels and the IFN-γ/IL-4 ratio (P<0.05), and markedly improved pulmonary functions (FVC, pre-FEV1% and pre-PEF%) (P<0.05). In the control group, the children exhibited significantly increased IFN-γ levels and IFN-γ/ IL-4 ratio (P<0.05) without obvious reduction of serum IL-4 levels or pulmonary function improvement (P>0.05). With comparable basic pulmonary functions in the two groups before the treatment, the children in SIT group showed significantly greater improvement in the pulmonary functions than those in the control group after the one-year treatment. Conclusion The one-year treatment with SIT can significantly improve the pulmonary functions of children with allergic asthma, and this effect is attributed to the regulation of Th1/Th2 cell balance and inhibition of asthmatic airway remodeling by SIT.更多还原