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Xu F, Wu Q, Yang Y, Zhang L, Yan Z, Li H, Li J, An Z, Wu H, Song J, Wu W. High temperature exacerbates ozone-induced airway inflammation: Implication of airway microbiota and metabolites. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166795. [PMID: 37666337 DOI: 10.1016/j.scitotenv.2023.166795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023]
Abstract
Short-term exposure to ozone (O3) has been associated with airway inflammation. Given that high temperature (HT) accelerates O3 production, it is of significance to determine whether co-exposure to HT exacerbates O3-induced airway inflammation. The aim of this study was to examine the possible promotive effect of HT on O3-induced airway inflammation and underlying mechanisms. Forty-eight C57BL/6 N male mice were randomly divided into four groups: filtered air (control), O3, HT, and HT + O3 (co-exposure) groups. Mice in control and O3 groups were exposed to filtered air or 1 ppm O3 at 24 °C, respectively, while mice in HT and co-exposure groups were exposed to filtered air or 1 ppm O3 at 36 °C, respectively. The exposure scenario for four groups was 4 h/d for 5 consecutive days. Bronchoalveolar lavage fluids (BALF) were collected 24 h after the last exposure and subjected to examinations of oxidative stress and inflammation biomarkers, 16S rRNA sequencing, and metabolic profiling. Lung tissues were processed for H&E histological staining. The results showed that O3 inhalation triggered oxidative stress and inflammation in the airways, which was worsen by co-exposure to HT. Further studies revealed that co-exposure to HT strengthened O3-induced decline in Firmicutes and Allobaculum in airways. Moreover, co-exposure to HT promoted O3-induced airway metabolic disorder. Spearman correlation analysis revealed correlations among microbiota dysbiosis, metabolic disorder, oxidative stress and inflammation induced by co-exposure to HT and O3. Taken together, HT exposure aggravates O3-induced airway oxidative stress and inflammation, possibly through modulation of microbiota and metabolism of the airways.
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Affiliation(s)
- Fei Xu
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Qiong Wu
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Yishu Yang
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Ling Zhang
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Zhen Yan
- International School of Public Health and One Health, Hainan Medical University, Haikou, China
| | - Huijun Li
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Juan Li
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Zhen An
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Hui Wu
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Jie Song
- School of Public Health, Xinxiang Medical University, Xinxiang, China
| | - Weidong Wu
- School of Public Health, Xinxiang Medical University, Xinxiang, China.
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Cardenas A, Fadadu R, Bunyavanich S. Climate change and epigenetic biomarkers in allergic and airway diseases. J Allergy Clin Immunol 2023; 152:1060-1072. [PMID: 37741554 PMCID: PMC10843253 DOI: 10.1016/j.jaci.2023.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/18/2023] [Accepted: 09/18/2023] [Indexed: 09/25/2023]
Abstract
Human epigenetic variation is associated with both environmental exposures and allergic diseases and can potentially serve as a biomarker connecting climate change with allergy and airway diseases. In this narrative review, we summarize recent human epigenetic studies examining exposure to temperature, precipitation, extreme weather events, and malnutrition to discuss findings as they relate to allergic and airway diseases. Temperature has been the most widely studied exposure, with the studies implicating both short-term and long-term exposures with epigenetic alterations and epigenetic aging. Few studies have examined natural disasters or extreme weather events. The studies available have reported differential DNA methylation of multiple genes and pathways, some of which were previously associated with asthma or allergy. Few studies have integrated climate-related events, epigenetic biomarkers, and allergic disease together. Prospective longitudinal studies are needed along with the collection of target tissues beyond blood samples, such as nasal and skin cells. Finally, global collaboration to increase diverse representation of study participants, particularly those most affected by climate injustice, as well as strengthen replication, validation, and harmonization of measurements will be needed to elucidate the impacts of climate change on the human epigenome.
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Affiliation(s)
- Andres Cardenas
- Department of Epidemiology and Population Health, Stanford University, Stanford, Calif.
| | - Raj Fadadu
- School of Medicine, University of California, San Francisco, Calif
| | - Supinda Bunyavanich
- Division of Allergy and Immunology, Department of Pediatrics, and Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY
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Danesh Yazdi M, Nassan FL, Kosheleva A, Wang C, Xu Z, Di Q, Requia WJ, Comfort NT, Wu H, Laurent LC, DeHoff P, Vokonas P, Baccarelli AA, Schwartz JD. Intermediate and long-term exposure to air pollution and temperature and the extracellular microRNA profile of participants in the normative aging study (NAS). ENVIRONMENTAL RESEARCH 2023; 229:115949. [PMID: 37084943 DOI: 10.1016/j.envres.2023.115949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/27/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND The molecular effects of intermediate and long-term exposure to air pollution and temperature, such as those on extracellular microRNA (ex-miRNA) are not well understood but may have clinical consequences. OBJECTIVES To assess the association between exposure to ambient air pollution and temperature and ex-miRNA profiles. METHODS Our study population consisted of 734 participants in the Normative Aging Study (NAS) between 1999 and 2015. We used high-resolution models to estimate four-week, eight-week, twelve-week, six-month, and one-year moving averages of PM2.5, O3, NO2, and ambient temperature based on geo-coded residential addresses. The outcome of interest was the extracellular microRNA (ex-miRNA) profile of each participant over time. We used a longitudinal quantile regression approach to estimate the association between the exposures and each ex-miRNA. Results were corrected for multiple comparisons and ex-miRNAs that were still significantly associated with the exposures were further analyzed using KEGG pathway analysis and Ingenuity Pathway Analysis. RESULTS We found 151 significant associations between levels of PM2.5, O3, NO2, and ambient temperature and 82 unique ex-miRNAs across multiple quantiles. Most of the significant results were associations with intermediate-term exposure to O3, long-term exposure to PM2.5, and both intermediate and long-term exposure to ambient temperature. The exposures were most often associated with the 75th and 90th percentile of the outcomes. Pathway analyses of significant ex-miRNAs revealed their involvement in biological pathways involving cell function and communication as well as clinical diseases such as cardiovascular disease, respiratory disease, and neurological disease. CONCLUSION Our results show that intermediate and long-term exposure to all our exposures of interest were associated with changes in the ex-miRNA profile of study participants. Further studies on environmental risk factors and ex-miRNAs are warranted.
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Affiliation(s)
- Mahdieh Danesh Yazdi
- Program in Public Health, Department of Family, Population, and Preventive Medicine, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY, USA; Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA.
| | - Feiby L Nassan
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Biogen Inc, Cambridge, MA, USA
| | - Anna Kosheleva
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Cuicui Wang
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Zongli Xu
- Laboratory of Molecular Carcinogenesis and Biostatistics Branch, National Institute of Environmental Health Sciences, Durham, NC, USA
| | - Qian Di
- Vanke School of Public Health, Tsinghua University, Beijing, China
| | - Weeberb J Requia
- School of Public Policy and Government, Fundação Getúlio Vargas, Brasília, Distrito Federal, Brazil
| | - Nicole T Comfort
- Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, NY, USA
| | - Haotian Wu
- Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, NY, USA
| | - Louise C Laurent
- Department of Obstetrics, Gynecology, & Reproductive Sciences, University of California San Diego, La Jolla, CA, USA
| | - Peter DeHoff
- Department of Obstetrics, Gynecology, & Reproductive Sciences, University of California San Diego, La Jolla, CA, USA
| | - Pantel Vokonas
- Department of Veterans Affairs, Boston, MA, USA; Department of Medicine, Boston University Chobanian and Avidisian School of Medicine, Boston, MA, USA
| | - Andrea A Baccarelli
- Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, NY, USA
| | - Joel D Schwartz
- Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA; Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA
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