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Meldrum K, Evans SJ, Burgum MJ, Doak SH, Clift MJD. Determining the toxicological effects of indoor air pollution on both a healthy and an inflammatory-comprised model of the alveolar epithelial barrier in vitro. Part Fibre Toxicol 2024; 21:25. [PMID: 38760786 PMCID: PMC11100169 DOI: 10.1186/s12989-024-00584-8] [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: 12/19/2023] [Accepted: 04/20/2024] [Indexed: 05/19/2024] Open
Abstract
Exposure to indoor air pollutants (IAP) has increased recently, with people spending more time indoors (i.e. homes, offices, schools and transportation). Increased exposures of IAP on a healthy population are poorly understood, and those with allergic respiratory conditions even less so. The objective of this study, therefore, was to implement a well-characterised in vitro model of the human alveolar epithelial barrier (A549 + PMA differentiated THP-1 incubated with and without IL-13, IL-5 and IL-4) to determine the effects of a standardised indoor particulate (NIST 2583) on both a healthy lung model and one modelling a type-II (stimulated with IL-13, IL-5 and IL-4) inflammatory response (such as asthma).Using concentrations from the literature, and an environmentally appropriate exposure we investigated 232, 464 and 608ng/cm2 of NIST 2583 respectively. Membrane integrity (blue dextran), viability (trypan blue), genotoxicity (micronucleus (Mn) assay) and (pro-)/(anti-)inflammatory effects (IL-6, IL-8, IL-33, IL-10) were then assessed 24 h post exposure to both models. Models were exposed using a physiologically relevant aerosolisation method (VitroCell Cloud 12 exposure system).No changes in Mn frequency or membrane integrity in either model were noted when exposed to any of the tested concentrations of NIST 2583. A significant decrease (p < 0.05) in cell viability at the highest concentration was observed in the healthy model. Whilst cell viability in the "inflamed" model was decreased at the lower concentrations (significantly (p < 0.05) after 464ng/cm2). A significant reduction (p < 0.05) in IL-10 and a significant increase in IL-33 was seen after 24 h exposure to NIST 2583 (464, 608ng/cm2) in the "inflamed" model.Collectively, the results indicate the potential for IAP to cause the onset of a type II response as well as exacerbating pre-existing allergic conditions. Furthermore, the data imposes the importance of considering unhealthy individuals when investigating the potential health effects of IAP. It also highlights that even in a healthy population these particles have the potential to induce this type II response and initiate an immune response following exposure to IAP.
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Affiliation(s)
- Kirsty Meldrum
- In Vitro Toxicology Group, Swansea University Medical School, Swansea University, Singleton Park Campus, Swansea, Wales, SA2 8PP, UK.
| | - Stephen J Evans
- In Vitro Toxicology Group, Swansea University Medical School, Swansea University, Singleton Park Campus, Swansea, Wales, SA2 8PP, UK
| | - Michael J Burgum
- In Vitro Toxicology Group, Swansea University Medical School, Swansea University, Singleton Park Campus, Swansea, Wales, SA2 8PP, UK
| | - Shareen H Doak
- In Vitro Toxicology Group, Swansea University Medical School, Swansea University, Singleton Park Campus, Swansea, Wales, SA2 8PP, UK
| | - Martin J D Clift
- In Vitro Toxicology Group, Swansea University Medical School, Swansea University, Singleton Park Campus, Swansea, Wales, SA2 8PP, UK.
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Asiniwasis R, Merati N, Roesler J, Simpson EL, Aubry R, McMullen E, Fraess L, Choi UY, Hinther K, Chu DK, Jack C. The Social and Home Environment: Impacts of Determinants of Health on Atopic Dermatitis, Pathways Toward Solutions, and Unique Considerations for Rural and Remote North American Indigenous Populations. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024; 12:290-299. [PMID: 38013155 DOI: 10.1016/j.jaip.2023.11.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 11/10/2023] [Accepted: 11/14/2023] [Indexed: 11/29/2023]
Abstract
Disparities in environmental and social determinants of health (DOH) are associated with morbidity in atopic dermatitis (AD). The socioecological model (SEM) is a framework that can be applied to better understand how such DOH impacts patients with AD. We include a case scenario of a remote Indigenous patient reflective of real-world situations of living with AD and examine relevant impact, gaps in knowledge, and further research needs. This review highlights a variety of social and environmental exposures as important DOH which must be addressed to achieve optimal management in AD. The "rainbow model" is a modified framework to help illustrate how complex environmental and social forces impact both AD presentation and therapeutic success. However, practical applications and outcome metrics for health promotion are limited. An inter- and transdisciplinary approach is paramount to address the complex challenges associated with AD care, as well as multistakeholder approach integrating culturally-competent equitable health frameworks. This review underscores the importance of expanding the focus of AD management beyond basic science and clinical trials to recognize and address health disparities and to promote optimal health and well-being in patients with AD, and contributes a working approach to mapping the complex interventions and patient-oriented research needed using a focus on remote North American Indigenous patients affected by AD.
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Affiliation(s)
- Rachel Asiniwasis
- Division of Dermatology, University of Saskatchewan, Regina, Saskatchewan, Canada.
| | - Nickoo Merati
- Division of Dermatology, Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Jordanna Roesler
- Department of Dermatology & Skin Science, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eric L Simpson
- Department of Dermatology, Oregon Health & Science University, Portland, Ore
| | - Rachel Aubry
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Eric McMullen
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Lauren Fraess
- College of Medicine, University of Saskatchewan, Regina, Saskatchewan, Canada
| | - U Yeong Choi
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Kelsey Hinther
- Division of Allergy and Clinical Immunology, McGill University, Montreal, Quebec, Canada
| | - Derek K Chu
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Carolyn Jack
- Division of Dermatology, Department of Medicine, McGill University, Montreal, Quebec, Canada; Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
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Lee S, Ryu SH, Sul WJ, Kim S, Kim D, Seo S. Association of exposure to indoor molds and dampness with allergic diseases at water-damaged dwellings in Korea. Sci Rep 2024; 14:135. [PMID: 38167981 PMCID: PMC10762174 DOI: 10.1038/s41598-023-50226-w] [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: 10/02/2023] [Accepted: 12/17/2023] [Indexed: 01/05/2024] Open
Abstract
This study aims to characterize levels of molds, bacteria, and environmental pollutants, identify the associations between indoor mold and dampness exposures and childhood allergic diseases, including asthma, allergic rhinitis, atopic dermatitis, using three different exposure assessment tools. A total of 50 children with their parents who registered in Seoul and Gyeonggi-do in Korea participated in this study. We collated the information on demographic and housing characteristics, environmental conditions, and lifestyle factors using the Korean version of the International Study of Asthma and Allergies in Childhood questionnaire. We also collected environmental monitoring samples of airborne molds and bacteria, total volatile organic compounds, formaldehyde, and particulate matter less than 10 µm. We evaluated and determined water damage, hidden dampness, and mold growth in dwellings using an infrared (IR) thermal camera and field inspection. Univariate and multivariate regression analyses were performed to evaluate the associations between prevalent allergic diseases and exposure to indoor mold and dampness. Indoor mold and bacterial levels were related to the presence of water damage in dwellings, and the mean levels of indoor molds (93.4 ± 73.5 CFU/m3) and bacteria (221.5 ± 124.2 CFU/m3) in water-damaged homes were significantly higher than those for molds (82.0 ± 58.7 CFU/m3) and for bacteria (152.7 ± 82.1 CFU/m3) in non-damaged dwellings (p < 0.05). The crude odds ratios (ORs) of atopic dermatitis were associated with < 6th floor (OR = 3.80), and higher indoor mold (OR = 6.42) and bacterial levels (OR = 6.00). The crude ORs of allergic diseases, defined as a group of cases who ever suffered from two out of three allergic diseases, e.g., asthma and allergic rhinitis, and allergic rhinitis were also increased by 3.8 and 9.3 times as large, respectively, with water damage (+) determined by IR camera (p < 0.05). The adjusted OR of allergic rhinitis was significantly elevated by 10.4 times in the water-damaged dwellings after adjusting age, sex, and secondhand smoke. Therefore, a longitudinal study is needed to characterize dominant mold species using DNA/RNA-based sequencing techniques and identify a causal relationship between mold exposure and allergic diseases in the future.
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Affiliation(s)
- Seokwon Lee
- Environmental Health Research Department, National Institute of Environmental Research, Incheon, 22689, Republic of Korea
| | - Seung-Hun Ryu
- Environmental Health Research Department, National Institute of Environmental Research, Incheon, 22689, Republic of Korea
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, 08826, Republic of Korea
| | - Woo Jun Sul
- Department of Systems Biotechnology, College of Biotechnology and Natural Resources, Chung-Ang University, Anseong, Gyeonggi-do, 17546, Republic of Korea
| | - Seunghyun Kim
- Allergy Immunology Center, College of Medicine, Korea University, Seoul, 02841, Republic of Korea
| | - Dohyeong Kim
- School of Economic, Political and Policy Sciences, University of Texas at Dallas, Richardson, TX, 75080-3021, USA
| | - SungChul Seo
- Department of Nano, Chemical and Biological Engineering, College of Engineering, Seokyeong University, Seoul, 02173, Republic of Korea.
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Liu TT, Wang YL, Zhang Z, Jia LX, Zhang J, Zheng S, Chen ZH, Shen HH, Piao CM, Du J. Abnormal adenosine metabolism of neutrophils inhibits airway inflammation and remodeling in asthma model induced by Aspergillus fumigatus. BMC Pulm Med 2023; 23:258. [PMID: 37452319 PMCID: PMC10347753 DOI: 10.1186/s12890-023-02553-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 07/06/2023] [Indexed: 07/18/2023] Open
Abstract
BACKGROUND Neutrophils consume a large amount of energy when performing their functions. Compared with other white blood cells, neutrophils contain few mitochondria and mainly rely on glycolysis and gluconeogenesis to produce ATP. The inflammatory site is hypoxic and nutrient poor. Our aim is to study the role of abnormal adenosine metabolism of neutrophils in the asthmatic airway inflammation microenvironment. METHOD In this study, an asthma model was established by intratracheal instillation of Aspergillus fumigatus extract in Ecto-5'-Nucleotidase (CD73) gene-knockout and wild-type mice. Multiple analyses from bronchoalveolar lavage fluid (BALF) were used to determine the levels of cytokines and chemokines. Immunohistochemistry was used to detect subcutaneous fibrosis and inflammatory cell infiltration. Finally, adenosine 5'-(α, β-methylene) diphosphate (APCP), a CD73 inhibitor, was pumped subcutaneously before Aspergillus attack to observe the infiltration of inflammatory cells and subcutaneous fibrosis to clarify its therapeutic effect. RESULT PAS staining showed that CD73 knockout inhibited pulmonary epithelial cell proliferation and bronchial fibrosis induced by Aspergillus extract. The genetic knockdownof CD73 significantly reduced the production of Th2 cytokines, interleukin (IL)-4, IL-6, IL-13, chemokine (C-C motif) ligand 5 (CCL5), eosinophil chemokine, neutrophil IL-17, and granulocyte colony-stimulating factor (G-CSF). In addition, exogenous adenosine supplementation increased airway inflammation. Finally, the CD73 inhibitor APCP was administered to reduce inflammation and subcutaneous fibrosis. CONCLUSION Elevated adenosine metabolism plays an inflammatory role in asthma, and CD73 could be a potential therapeutic target for asthma.
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Affiliation(s)
- Ting-Ting Liu
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Yue-Li Wang
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Zhi Zhang
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Li-Xin Jia
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Jing Zhang
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Shuai Zheng
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China
| | - Zhi-Hua Chen
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Hua-Hao Shen
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, China
| | - Chun-Mei Piao
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China.
| | - Jie Du
- Beijing Anzhen Hospital, Capital Medical University; Beijing Institute of Heart, Lung and Blood Vessel Diseases, The Key Laboratory of Remodeling Cardiovascular Diseases, Ministry of Education; Collaborative Innovation Center for Cardiovascular Disorders, 100029, Beijing, China.
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Liu N, Zhao Z, Mandin C, Kan H, Zhang Y. Why should we target the burden of disease for indoor air pollutants? INDOOR AIR 2022; 32:e13147. [PMID: 36437648 DOI: 10.1111/ina.13147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Affiliation(s)
- Ningrui Liu
- Department of Building Science, Tsinghua University, Beijing, China
- Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing, China
| | - Zhuohui Zhao
- School of Public Health, Fudan University, Shanghai, China
| | - Corinne Mandin
- Scientific and Technical Center for Building (CSTB)/Observatory of Indoor Air Quality, University of Paris-Est, Marne-la-Vallée, France
| | - Haidong Kan
- School of Public Health, Fudan University, Shanghai, China
| | - Yinping Zhang
- Department of Building Science, Tsinghua University, Beijing, China
- Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing, China
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