A DNA vaccine encoding a chimeric allergen derived from major group 1 allergens of dust mite can be used for specific immunotherapy

International Journal of Clinical and Experimental Pathology

Tong Sun¹ 

关键词: Dermatophagoides allergen 1 group;    chimeric gene;    DNA vaccine;    asthma;   

DOI  :  

学科分类：生理学与病理学

来源: e-Century Publishing Corporation

【 摘 要 】

Immunization with DNA-based constructs has been shown to be against the antigen and the response is skewed in such a way as to ameliorate the symptoms of allergic disease. This approach is particularly useful in the treatment of allergic inflammatory diseases, such as asthma. The major group 1 allergen from house dust mites is one of the triggers of allergic asthma. This study explores whether a chimeric gene R8, derived from the major group 1 allergen of house dust mite species (Dermatophagoides farinae and Dermatophagoides pteronyssinus), can be expressed in Human Embryonic Kidney 293 cells (HEK 293T) and whether such a construct can be used as a DNA vaccine in asthma therapy. The eukaryotic expression vector pcDNA3.1 was used to express the R8 molecule in HEK 293T cells and successful expression of R8 was confirmed using a fluorescence microscope and western blot analysis. The efficacy of R8 as DNA vaccine was also assessed in a mouse asthma model. The in vivo data showed that R8 rectified the TH1/TH2 imbalance typical of allergic inflammation and stimulated the proliferation of regulatory T (Treg) cells. Immunization with the R8 construct also decreased serum allergen-specific IgE production in this mouse asthma model. Our findings suggest that R8 may be a feasible potential DNA vaccine for specific immunotherapy (SIT) in the treatment of allergic asthma.

【 授权许可】

CC BY-NC