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Yuan X, Wang J, Li Y, He X, Niu B, Wu D, Lan N, Wang X, Zhang Y, Dai X, Wang X, Liu Z, Li G. Allergy immunotherapy restores airway epithelial barrier dysfunction through suppressing IL-25 -induced endoplasmic reticulum stress in asthma. Sci Rep 2018; 8:7950. [PMID: 29784924 PMCID: PMC5962552 DOI: 10.1038/s41598-018-26221-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 05/01/2018] [Indexed: 12/27/2022] Open
Abstract
Constant exposure to allergen triggers destructive type 2 cell-mediated inflammation. The effect of allergen specific immunotherapy (SIT) in maintaining airway epithelial barrier function in asthma remains unknown. In the current study, we showed that SIT maintained airway epithelial homeostasis in mice exposed to dermatophagoides farinae (Der f), which induced increased expression of IL-25, endoplasmic reticulum (ER) stress and airway epithelial apoptosis. Meanwhile, SIT treatment ameliorated airway inflammatory infiltration and hyper-responsiveness in allergic mice. SIT treatment restored the airway epithelial integrity, attenuated Der f -induced airway epithelial ER stress and epithelial apoptosis. We also found that 4-PBA, an inhibitor of ER stress, suppressed airway epithelial ER stress and apoptosis in vitro. The pathological changes were partially induced by IL-25-induced ER stress, epithelial tight junction damage, and cell apoptosis in airways following allergen exposure. Furthermore, IL-25 induced ER stress in airway epithelial cells in vitro. The IL-25-induced airway epithelial apoptosis dependent on PERK activity was inhibited by 4-PBA. Taken together, we demonstrate that SIT is effective in allergic asthma and dependent on its depressive effect on the expression of IL-25, epithelial integrity damage, and epithelial ER stress.
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Affiliation(s)
- Xiefang Yuan
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Junyi Wang
- Department of Respiratory Disease, the Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, China
| | - Yin Li
- The First Clinic College, Chongqing Medical University, Chongqing, 401331, China
| | - Xiang He
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Bin Niu
- Respiratory Disease Departments, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Dehong Wu
- Department of Respiratory Disease, the Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, China
| | - Nan Lan
- Respiratory Disease Departments, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Xiaoyun Wang
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Yun Zhang
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Xi Dai
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Xing Wang
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Zhigang Liu
- The State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen University School of Medicine, Shenzhen, 518060, China.
| | - Guoping Li
- Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, 646000, China. .,Department of Respiratory Disease, the Third People's Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, China.
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