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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2016 ; 11
(3
): e0151581
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English Wikipedia
Intranasal Administration of Recombinant Mycobacterium smegmatis Inducing IL-17A
Autoantibody Attenuates Airway Inflammation in a Murine Model of Allergic Asthma
#MMPMID26974537
Xu W
; Chen L
; Guo S
; Wu L
; Zhang J
PLoS One
2016[]; 11
(3
): e0151581
PMID26974537
show ga
Asthma is a chronic inflammatory disorder, previous studies have shown that
IL-17A contributes to the development of asthma, and there is a positive
correlation between the level of IL-17A and the severity of disease. Here, we
constructed recombinant Mycobacterium smegmatis expressing fusion protein
Ag85A-IL-17A (rMS-Ag85a-IL-17a) and evaluated whether it could attenuate allergic
airway inflammation, and further investigated the underlying mechanism. In this
work, the murine model of asthma was established with ovalbumin, and mice were
intranasally vaccinated with rMS-Ag85a-IL-17a. Autoantibody of IL-17A in sera was
detected, and the airway inflammatory cells infiltration, the local cytokines and
chemokines production and the histopathological changes of lung tissue were
investigated. We found that the administration of rMS-Ag85a-IL-17a induced the
autoantibody of IL-17A in sera. The vaccination of rMS-Ag85a-IL-17a remarkably
reduced the infiltration of inflammatory cells and the secretion of mucus in lung
tissue and significantly decreased the numbers of the total cells, eosinophils
and neutrophils in BALF. Th1 cells count in spleen, Th1 cytokine levels in BALF
and supernatant of splenocytes and mediastinal lymph nodes, and T-bet mRNA in
lung tissue were significantly increased with rMS-Ag85a-IL-17a administration.
Meanwhile, rMS-Ag85a-IL-17a vaccination markedly decreased Th2 cells count, Th2
cytokine and Th17 cytokine levels in BALF and supernatant of splenocytes and
mediastinal lymph nodes, and chemokines mRNA expression in lung tissue. These
data confirmed that recombinant Mycobacterium smegmatis in vivo could induce
autoantibody of IL-17A, which attenuated asthmatic airway inflammation.