Blocking antibodies induced by allergen-specific immunotherapy ameliorate allergic airway disease in a human/mouse chimeric model

Allergy ◽  
2017 ◽  
Vol 73 (4) ◽  
pp. 851-861 ◽  
Author(s):  
C. Vizzardelli ◽  
M. Gindl ◽  
S. Roos ◽  
C. Möbs ◽  
B. Nagl ◽  
...  
Keyword(s):  
Specific Immunotherapy ◽  
Airway Disease ◽  
Allergic Airway Disease ◽  
Allergen Specific Immunotherapy ◽  
Chimeric Model ◽  
Blocking Antibodies

scholarly journals Effectiveness and safety of oral lactococci-based vaccine encoding triple common allergens to prevent airway allergy in mice

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261333
Author(s):  
Mey-Fann Lee ◽  
Chu-Hui Chiang ◽  
Shyh-Jye Lin ◽  
Chi-Sheng Wu ◽  
Yi-Hsing Chen
Keyword(s):  
Oral Delivery ◽  
Expression System ◽  
Body Weight Loss ◽  
Airway Disease ◽  
Developed Countries ◽  
Allergic Airway Disease ◽  
Inflammatory Disorder ◽  
Indoor Allergens ◽  
Allergen Specific Immunotherapy ◽  
Disease Modifying Treatment

Allergic airway disease is the most common chronic airway inflammatory disorder in developed countries. House dust mite, cockroach, and mold are the leading allergens in most tropical and subtropical countries, including Taiwan. As allergen avoidance is difficult for patients allergic to these perennial indoor allergens, allergen-specific immunotherapy (ASIT) is the only available allergen-specific and disease-modifying treatment. However, for patients sensitized to multiple allergens, ASIT using each corresponding allergen is cumbersome. In the present study, we developed a recombinant L. lactis vaccine against the three most common indoor aeroallergens and investigated its effectiveness for preventing respiratory allergy and safety in mice. Three recombinant clones of Der p 2 (mite), Per a 2 (roach), and Cla c 14 (mold) were constructed individually in pNZ8149 vector and then electroporated into host strain L.lactis NZ3900. BALB/c mice were fed with the triple vaccine 5 times per week for 4 weeks prior to sensitization. The effectiveness and safety profile were then determined. Oral administration of the triple vaccine significantly alleviated allergen-induced airway hyper-responsiveness in the vaccinated mice. The allergen-specific IgG2a was upregulated. IL-4 and IL-13 mRNA expressions as well as inflammatory cell infiltration in the lungs decreased significantly in the vaccinated groups. No body weight loss or abnormal findings in the liver and kidneys were found in any of the groups of mice. This is the first report to describe a triple-aeroallergen vaccine using a food-grade lactococcal expression system. We developed a convenient oral delivery system and intend to extend this research to develop a vaccination that can be self-administered at home by patients.

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