变应原特异性免疫治疗(SIT)是目前已知的唯一能改变变态反应性疾病患者对变应原免疫的类型，并有可能治愈变态反应性疾病的方法。通常是通过反复多次皮下注射，即皮下免疫治疗(SCIT)，诱导患者对变应原的耐受，但因其不良反应较大，并有可能引起过敏性休克等原因而使其应用受到限制。近来通过舌下含服的方法进行免疫治疗，即舌下免疫治疗(SLIT)，引起了临床上广泛的兴趣。与SCIT相比，SLIT完全由患者自己使用药物，因此更方便，临床研究也证实这种方法更安全，也更有效。而且与药物治疗相比，SLIT可以显著降低临床费用，减轻患者和社会的负担。但是SLIT诱导免疫耐受的确切机制目前仍不清楚。
Objective To investigate the effects of FasL gene-modified dendritic cell (DC) on the airway inflammation in mice sensitized/challenged by house dust mite (HDM) allergen.Methods FasL gene-modified DC (FasL-DC) and control DC (nontransfection DC) were administrated into HDM sensitized and challenged mice by intratracheal injection respectively，then HDM sensitized and challenged mice were sacreificed two days later.Total and differentiation cell counts and levels of interleukin-4（IL-4），IL-5 and interferon-γ(IFN-) in bronchoalveolar lavage fluid (BALF) were detected and lung histological features were observed.Results After administration of FasL-DC，lung allergic inflammation was ameliorated while total cell counts，the percentage of eosinophil ,the levels of IL-4 and IL-5 in BALF decreased and the level of IFN- in BALF increased.Conclusion Administrating FasL-DC into HDM sensitized/challenged mice can inhibit Th2 cells activation and ameliorate airway allergic inflammation.