Study on influence of OVA specific immunotherapy on IL-23/Th17 axis of a mouse asthma model and its mech-anism
- VernacularTitle:OVA特异性免疫治疗对哮喘小鼠IL-23/Th17轴的影响及机制研究
- Author:
Shi-Min ZHONG
1
;
Wen-Ting FAN
;
Qi HU
;
Jing ZENG
;
Zhi-Qiang CHEN
;
Hui SHAO
;
Ying HU
;
Jin-Yu WANG
;
Wei LIAO
Author Information
- Keywords: ovalbumin; mouse model; bronchial asthma; immune tolerance; IL-23; Th17; TGF-β1
- From: Journal of Regional Anatomy and Operative Surgery 2018;27(5):311-317
- CountryChina
- Language:Chinese
- Abstract: Objective To establish a mouse model of immune treatment of asthma through subcutaneous injection with high dose of ovalbumin( OVA) in the abdomen and investigate the role of IL-23/Th17 axis response in its mechanism. Methods With a random number table method, 18 female BALB/c mice were divided into 3 groups( normal control group,asthma group and asthmatic immune tolerance model group) ,with 6 mice in each group. The mice in the asthmatic immune tolerance model group were sensitized with 10 μg OVA by intraperito-neal injection in the abdomen on day 0 and day 7. The mice in the model group induced immune tolerance with 1 mg OVA by subcutaneous injection in the abdomen every day for a week(day 21 to day 27). Both the model group and asthma control group were challenged with 1％OVA on day 35 to day 41. The mice in the normal control group were challenged with the equal amount of saline. On the 50th day,each group were sforzando challenged once with 10％ OVA. The airway reactivity was detected at 24 after the last challenge. The enhanced pause( Penh) was measured to evaluate the airway responsiveness with a lung functional instrument. Bronchoalveolar lavage fluid( BALF) was collected to count the total cells and eosinophils,and the cytological studies were conducted. The OVA-specific IgE in peripheral blood,and the IL-5,IFN-γIL-23,IL-10 in BALF were detected by enzyme-linked immunosorbent assay(ELISA). The lung tissue was obtained to perform histological analysis by HE staining. The percentagea of Treg and Th17 cells in spleen and lung tissue were calculated by the flow cytometry( FCM) . Then the expression of transcription factors was detected by q-PCR. Results For the asthmatic immune tolerance model group, the airway respon-siveness,the cell count of eosinophilic granulocytes in BALF,the levels of IL-23 and OVA-specific IgE in the serum were significantly lower than the asthma group and the difference is of statistical significance(P<0. 05),while the difference in the IFN-γlevel in BALF compared with the asthma group is of no statistical significance(P<0. 05). The transcription factor of lung tissue detected with q-PCR showed Foxp3 in the asthmatic immune tolerance model group was significantly higher than the asthma group,while RORγt was significantly lower than the asthma group(P>0. 05) and the differences were of statistical significance(P<0. 05). Conclusion Large dose of OVA specific immuno-therapy can alleviate the chronic inflammatory response of asthmatic mice, and the decrease of Th17 cells associated with the expression of IL-23 was decreased. The mechanism may be related to the correction of the lung Il-23 /Th17 axis.
