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Meng H, Zhang D, Que Y, Hu P, Wang R, Liao Y, Xu G. Intermittent hypoxic pretreatment exacerbates house dust mite-induced asthma airway inflammation. Immun Inflamm Dis 2024; 12:e1253. [PMID: 38629734 PMCID: PMC11022611 DOI: 10.1002/iid3.1253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 03/13/2024] [Accepted: 03/26/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND Asthma is widely recognized as an inflammatory disorder. In the context of this inflammatory microenvironment, the involvement of hypoxia and its impact on related pathways have drawn considerable attention. However, the exact role of hypoxia, a prevalent environmental factor, in the development and progression of asthma remains poorly understood. METHODS Mice were treated with house dust mite (HDM) extracts for 23 days to induce asthma. Mice were divided into room air (RA) group and intermittent hypoxic (IH) group by exposing to different conditions and IH preconditioning (IHP) were underwent to the above groups before the hypoxic regimen. Airway inflammation in mice was evaluated by airway hyperresponsiveness, excessive mucus secretion, and recruitment of inflammatory cells. Immunohistochemistry was employed to quantify the expression levels of NF-κB. Subsequently, the dose of allergen was modified to investigate whether the impact of hypoxia on asthma is affected by different doses of allergens. RESULT Compared to the RA and IH groups, HDM-treated mice in the IHP group exhibited aggravated inflammatory cell infiltration and airway hyperresponsiveness (p<.05). Moreover, there was an increased release of inflammatory mediators and higher expression levels of NF-κB (p<.05). Importantly, the impact ia on asthma was found to be influenced by high dose of allergen (p<.05). CONCLUSION IHP treatment potentially exacerbates HDM-induced airway inflammation in asthma, with the involvement of NF-κB, particularly under high-dose allergen stimulation.
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Affiliation(s)
- Hao Meng
- Health Management Institute, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General HospitalMedical School of Chinese PLABeijingChina
| | - Dongxue Zhang
- Department of Endocrinology, Beijing Shijitan HospitalCapital Medical UniversityBeijingChina
| | - Yifan Que
- Health Management Institute, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General HospitalMedical School of Chinese PLABeijingChina
| | - Peng Hu
- Health Management Institute, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General HospitalMedical School of Chinese PLABeijingChina
| | - Runsheng Wang
- Department of Respiratory and Critical Care Medicine, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General HospitalMedical School of Chinese PLABeijingChina
| | - Yunfei Liao
- Department of Endocrinology, Union Hospital, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina
- Hubei Provincial Clinical Research Center for Diabetes and Metabolic DisordersWuhanChina
| | - Guogang Xu
- Health Management Institute, The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General HospitalMedical School of Chinese PLABeijingChina
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Pang J, Shi Y, Peng D, Cui L, Xu Y, Wang W, Hu Y, Yang Y, Wang J, Qin X, Zhang Y, Meng H, Wang D, Bai G, Yuan H, Liu J, Lv Z, Li Y, Cui Y, Wang W, Huang K, Corrigan CJ, Wang W, Chen Y, Ying S. Bacterial antigens and asthma: a comparative study of common respiratory pathogenic bacteria. J Asthma 2024:1-14. [PMID: 38478043 DOI: 10.1080/02770903.2024.2330063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 03/08/2024] [Indexed: 03/23/2024]
Abstract
Objective: In a previous study we have shown that, in the presence of interleukin (IL)-33, repeated, per-nasal challenge of murine airways with Streptococcus pneumoniae (S. pneumoniae) organisms induces human asthma-like airways inflammation. It is not clear, however, whether this effect is unique or manifest in response to other common respiratory pathogens.Methods: To explore this, airways of BALB/c mice were repeatedly challenged per-nasally with formaldehyde-inactivated bacterial bodies in the presence or absence of murine recombinant IL-33. Serum concentrations of S.pneumoniae, Moraxella catarrhalis (M.catarrhalis) and Haemophilus influenzae (H.influenzae) lysates-specific IgE were measured in patients with asthma and control subjects.Results: We showed that in the presence of IL-33, repeated, per-nasal airways exposure to the bodies of these bacteria induced airways hyperresponsiveness (AHR) in the experimental mice. This was accompanied by cellular infiltration into bronchoalveolar lavage fluid (BALF), eosinophilic infiltration and mucous hypertrophy of the lung tissue, with elevated local expression of some type 2 cytokines and elevated, specific IgG and IgE in the serum. The precise characteristics of the inflammation evoked by exposure to each bacterial species were distinguishable.Conclusions: These results suggest that in the certain circumstances, inhaled or commensal bacterial body antigens of both Gram-positive (S. pneumoniae) and Gram-negative (M. catarrhalis and H. influenzae) respiratory tract bacteria may initiate type 2 inflammation typical of asthma in the airways. In addition, we demonstrated that human asthmatic patients manifest elevated serum concentrations of M.catarrhalis- and H.influenzae-specific IgE.
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Affiliation(s)
- Jie Pang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Yifan Shi
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Dan Peng
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Lele Cui
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yingjie Xu
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Wenjing Wang
- Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Yue Hu
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yiran Yang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Jingjing Wang
- Department of Laboratory Animal Sciences, Capital Medical University, Beijing, China
| | - Xiaofeng Qin
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yue Zhang
- Fifth School of Clinical Medicine, Peking University, Beijing, China
| | - Hao Meng
- The Second Medical Center & National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing, China
| | - Dan Wang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ge Bai
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Huihui Yuan
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Jie Liu
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Zhe Lv
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yan Li
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing Key Laboratory of Nasal Diseases, Beijing, China
| | - Ye Cui
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Wenjun Wang
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University & Beijing Institute of Respiratory Medicine, Beijing, China
| | - Kewu Huang
- Department of Respiratory and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University & Beijing Institute of Respiratory Medicine, Beijing, China
| | - Chris J Corrigan
- Division of Asthma, Allergy & Lung Biology, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - Wei Wang
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yan Chen
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Sun Ying
- Department of Immunology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
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Fu T, Liu J, Wang W, Li Y, Wang Y, Cui L, Liu M, Wang W, Ying S, Huang K. Similarities and differences in kinetic characteristics of airways inflammation, formation of inducible bronchial-associated lymphoid tissue and remodeling between young and old murine asthma surrogates induced with house dust mite. Exp Gerontol 2023; 175:112160. [PMID: 37019047 DOI: 10.1016/j.exger.2023.112160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 04/05/2023]
Abstract
Elderly asthmatics have higher morbidity and mortality compared with those of youngers. It has been shown that there are also some differences in clinic phenomena between young and elderly asthmatics, however, there is lack of the kinetic comparisons of the changes in the development of asthma between two populations. To better understand the specific pathophysiological manifestations in older patients with asthma, we dynamically and parallelly compared pathophysiological changes in the airways and lung tissues between young and old murine asthma surrogates based on sensitization and challenge with house dust mite (HDM). Murine models were established in young (6-8-week-old) and old (16-17-month-old) female wild-type C57BL/6 mice. Our data showed that repetitive HDM exposure induced relatively low type 2 immune responses (airway hyperresponsiveness, eosinophils recruitment, expression of type 2 cytokines, mucus secretion, serum HDM specific immunoglobulin E (IgE) and IgG) in old mice. However, the type 3 immune responses (neutrophils infiltration and IL-17A expression) were enhanced in old HDM exposed mice, which sustained longer and higher than that of young mice. Notably, the relatively weakened allergic inflammation characteristics might be associated with lower numbers of CD20+ B cells and IgE+ cells in the iBALTs in old mice compared with those in young mice. Our data suggest that aging might compromise the ability to induce type 2 immune responses, but enhance type 3 immune responses upon repetitive HDM challenge, which might cause relevant phenomena in old experimental mice and might even be applicable to elderly patients with asthma in the clinic.
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Muruganandah V, Kupz A. Immune responses to bacterial lung infections and their implications for vaccination. Int Immunol 2021; 34:231-248. [PMID: 34850883 DOI: 10.1093/intimm/dxab109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/28/2021] [Indexed: 11/14/2022] Open
Abstract
The pulmonary immune system plays a vital role in protecting the delicate structures of gaseous exchange against invasion from bacterial pathogens. With antimicrobial resistance becoming an increasing concern, finding novel strategies to develop vaccines against bacterial lung diseases remains a top priority. In order to do so, a continued expansion of our understanding of the pulmonary immune response is warranted. Whilst some aspects are well characterised, emerging paradigms such as the importance of innate cells and inducible immune structures in mediating protection provide avenues of potential to rethink our approach to vaccine development. In this review, we aim to provide a broad overview of both the innate and adaptive immune mechanisms in place to protect the pulmonary tissue from invading bacterial organisms. We use specific examples from several infection models and human studies to depict the varying functions of the pulmonary immune system that may be manipulated in future vaccine development. Particular emphasis has been placed on emerging themes that are less reviewed and underappreciated in vaccine development studies.
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Affiliation(s)
- Visai Muruganandah
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD 4878, Australia
| | - Andreas Kupz
- Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, QLD 4878, Australia
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