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Feng S, Yang L, Dou S, Li X, Wen S, Yan L, Huang W, Zhang Y, Ma B, Yuan L, Li S, Lu P, Guo Y. Associations between long-term ozone exposure and small airways function in Chinese young adults: a longitudinal cohort study. Respir Res 2024; 25:105. [PMID: 38419020 PMCID: PMC10902944 DOI: 10.1186/s12931-024-02679-4] [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: 07/24/2023] [Accepted: 01/03/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND Increasing evidence is appearing that ozone has adverse effects on health. However, the association between long-term ozone exposure and lung function is still inconclusive. OBJECTIVES To investigate the associations between long-term exposure to ozone and lung function in Chinese young adults. METHODS We conducted a prospective cohort study among 1594 college students with a mean age of 19.2 years at baseline in Shandong, China from September 2020 to September 2021. Lung function indicators were measured in September 2020 and September 2021, including forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), forced expiratory flow at the 25th, 50th, and 75th percentile of the FVC (FEF25, FEF50, and FEF75) and mean flow rate between 25% and 75% of the FVC (FEF25-75) were measured. Daily 10 km×10 km ozone concentrations come from a well-validated data-fusion approach. The time-weighted average concentrations in 12 months before the lung function test were defined as the long-term ozone exposure. The associations between long-term ozone exposure and lung function indicators in Chinese young adults were investigated using a linear mixed effects model, followed by stratified analyses regarding sex, BMI and history of respiratory diseases. RESULTS Each interquartile range (IQR) (8.9 µg/m3) increase in long-term ozone exposure were associated with a -204.3 (95% confidence interval (CI): -361.6, -47.0) ml/s, -146.3 (95% CI: -264.1, -28.4) ml/s, and - 132.8 (95% CI: -239.2, -26.4) ml/s change in FEF25, FEF50, and FEF25-75, respectively. Stronger adverse associations were found in female participants or those with BMI ≥ 24 kg/m2 and history of respiratory diseases. CONCLUSION Long-term exposure to ambient ozone is associated with impaired small airway indicators in Chinese young adults. Females, participants with BMI ≥ 24 kg/m2 and a history of respiratory disease have stronger associations.
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Affiliation(s)
- Shurong Feng
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Liu Yang
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Siqi Dou
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Xinyuan Li
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Shuo Wen
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Lailai Yan
- Department of Laboratorial Science and Technology, School of Public Health, Peking University, Beijing, China
| | - Wenzhong Huang
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC, 3004, Australia
| | - Yiwen Zhang
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC, 3004, Australia
| | - Bin Ma
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Linghong Yuan
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China
| | - Shanshan Li
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC, 3004, Australia
| | - Peng Lu
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China.
| | - Yuming Guo
- School of Public Health, Binzhou Medical University, 346 Guanhai Road, Yantai, 264003, Shandong, China.
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC, 3004, Australia.
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2
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Hazlehurst MF, Dearborn LC, Sherris AR, Loftus CT, Adgent MA, Szpiro AA, Ni Y, Day DB, Kaufman JD, Thakur N, Wright RJ, Sathyanarayana S, Carroll KN, Moore PE, Karr CJ. Long-term ozone exposure and lung function in middle childhood. ENVIRONMENTAL RESEARCH 2024; 241:117632. [PMID: 37967704 PMCID: PMC11067856 DOI: 10.1016/j.envres.2023.117632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND Ozone (O3) exposure interrupts normal lung development in animal models. Epidemiologic evidence further suggests impairment with higher long-term O3 exposure across early and middle childhood, although study findings to date are mixed and few have investigated vulnerable subgroups. METHODS Participants from the CANDLE study, a pregnancy cohort in Shelby County, TN, in the ECHO-PATHWAYS Consortium, were included if children were born at gestational age >32 weeks, completed a spirometry exam at age 8-9, and had a valid residential history from birth to age 8. We estimated lifetime average ambient O3 exposure based on each child's residential history from birth to age 8, using a validated fine-resolution spatiotemporal model. Spirometry was performed at the age 8-9 year study visit to assess Forced Expiratory Volume in the first second (FEV1) and Forced Vital Capacity (FVC) as primary outcomes; z-scores were calculated using sex-and-age-specific reference equations. Linear regression with robust variance estimators was used to examine associations between O3 exposure and continuous lung function z-scores, adjusted for child, sociodemographic, and home environmental factors. Potential susceptible subgroups were explored using a product term in the regression model to assess effect modification by child sex, history of bronchiolitis in infancy, and allergic sensitization. RESULTS In our sample (n = 648), O3 exposure averaged from birth to age 8 was modest (mean 26.6 [SD 1.1] ppb). No adverse associations between long-term postnatal O3 exposure were observed with either FEV1 (β = 0.12, 95% CI: -0.04, 0.29) or FVC (β = 0.03, 95% CI: -0.13, 0.19). No effect modification by child sex, history of bronchiolitis in infancy, or allergic sensitization was detected for associations with 8-year average O3. CONCLUSIONS In this sample with low O3 concentrations, we did not observe adverse associations between O3 exposures averaged from birth to age 8 and lung function in middle childhood.
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Affiliation(s)
- Marnie F Hazlehurst
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA.
| | - Logan C Dearborn
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
| | - Allison R Sherris
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
| | - Christine T Loftus
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
| | - Margaret A Adgent
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Adam A Szpiro
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, WA, USA
| | - Yu Ni
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA; School of Public Health, College of Health and Human Services, San Diego State University, San Diego, CA, USA
| | - Drew B Day
- Center for Child Health, Behavior, and Development of Child Health, Behavior, and Development, Seattle Children's Research Institute, Seattle, WA, USA
| | - Joel D Kaufman
- Departments of Epidemiology and of Environmental and Occupational Health Sciences, School of Public Health, and Department of Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - Neeta Thakur
- Division of Pulmonary and Critical Care Medicine, School of Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Rosalind J Wright
- Departments of Pediatrics and of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sheela Sathyanarayana
- Department of Pediatrics, School of Medicine and Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, and Seattle Children's Research Institute, Seattle, WA, USA
| | - Kecia N Carroll
- Departments of Pediatrics and of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Paul E Moore
- Division of Allergy, Immunology, and Pulmonary Medicine, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Catherine J Karr
- Department of Pediatrics, School of Medicine and Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA
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3
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Stevens NC, Edwards PC, Van Winkle LS. Early-life ozone exposure modulates region-specific gene expression in the developing rat lung. Toxicol Lett 2023; 389:26-33. [PMID: 37871705 DOI: 10.1016/j.toxlet.2023.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 10/13/2023] [Accepted: 10/19/2023] [Indexed: 10/25/2023]
Abstract
Early-life ozone exposure disrupts normal patterns of lung development, but the molecular determinants underlying these changes are not well understood. This study aimed to elucidate changes in gene expression following episodic ozone exposure to identify potential mechanisms of ozone-mediated impairments in lung development. Rat pups were exposed to either filtered air or ozone (0.5 ppm, 6 hr./day, 5 days/week) from postnatal day (PND) 7-28 (16 dams total with 8 pups each, 4 M & 4 F) and sacrificed at either PND 30-31 or PND 80-84. Lung microdissection isolated major regions for RNA-Seq analysis. Ozone modified inherent differences in gene expression between lung regions in both male and female rat pups, whereas statistically significant changes in gene expression directly attributed to ozone were only identified in females. The greatest number of differentially expressed genes was observed between the distal airways and the parenchyma of ozone-exposed juvenile female rats, with 355 genes being differentially expressed. Genes modulating epithelial-to-mesenchymal transition, cell growth, and adhesion were differentially expressed in the parenchyma of ozone exposed juvenile females, suggesting that episodic ozone exposure may affect branching morphogenesis and lung cell growth. Importantly, our study provides novel targets for future experiments investigating the impact of ozone on lung development.
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Affiliation(s)
| | - Patricia C Edwards
- Center for Health and the Environment, University of California Davis, Davis, CA, USA
| | - Laura S Van Winkle
- Center for Health and the Environment, University of California Davis, Davis, CA, USA; Department of Anatomy, Physiology and Cell Biology School of Veterinary Medicine, University of California Davis, Davis, CA, USA.
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4
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Dearborn LC, Hazlehurst MF, Loftus CT, Szpiro AA, Carroll KN, Moore PE, Adgent MA, Barrett ES, Nguyen RHN, Sathyanarayana S, LeWinn KZ, Bush NR, Kaufman JD, Karr CJ. Role of Air Pollution in the Development of Asthma Among Children with a History of Bronchiolitis in Infancy. Epidemiology 2023; 34:554-564. [PMID: 37042935 PMCID: PMC10563986 DOI: 10.1097/ede.0000000000001613] [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: 01/13/2022] [Accepted: 03/12/2023] [Indexed: 04/13/2023]
Abstract
BACKGROUND Infants experiencing bronchiolitis are at increased risk for asthma, but few studies have identified modifiable risk factors. We assessed whether early life air pollution influenced child asthma and wheeze at age 4-6 years among children with a history of bronchiolitis in the first postnatal year. METHODS Children with caregiver-reported physician-diagnosed bronchiolitis were drawn from ECHO-PATHWAYS, a pooled longitudinal cohort from six US cities. We estimated their air pollution exposure from age 1 to 3 years from validated spatiotemporal models of fine particulate matter (PM 2.5 ), nitrogen dioxide (NO 2 ), and ozone (O 3 ). Caregivers reported children's current wheeze and asthma at age 4-6 years. We used modified Poisson regression to estimate relative risks (RR) and 95% confidence intervals (CI), adjusting for child, maternal, and home environmental factors. We assessed effect modification by child sex and maternal history of asthma with interaction models. RESULTS A total of 224 children had caregiver-reported bronchiolitis. Median (interquartile range) 2-year pollutant concentrations were 9.3 (7.8-9.9) µg/m 3 PM 2.5 , 8.5 (6.4-9.9) ppb NO 2 , and 26.6 (25.6-27.7) ppb O 3 . RRs (CI) for current wheeze per 2-ppb higher O 3 were 1.3 (1.0-1.7) and 1.4 (1.1-1.8) for asthma. NO 2 was inversely associated with wheeze and asthma whereas associations with PM 2.5 were null. We observed interactions between NO 2 and PM 2.5 and maternal history of asthma, with lower risks observed among children with a maternal history of asthma. CONCLUSION Our results are consistent with the hypothesis that exposure to modest postnatal O 3 concentrations increases the risk of asthma and wheeze among the vulnerable subpopulation of infants experiencing bronchiolitis.
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Affiliation(s)
- Logan C Dearborn
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
| | - Marnie F Hazlehurst
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
| | - Christine T Loftus
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
| | - Adam A Szpiro
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, WA
| | - Kecia N Carroll
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, NY
| | - Paul E Moore
- Division of Allergy, Immunology, and Pulmonology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
| | - Margaret A Adgent
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, TN
| | - Emily S Barrett
- Department of Biostatistics and Epidemiology, Environmental and Occupational Health Sciences Institute, Rutgers School of Public Health, Piscataway, NJ
- Department of Obstetrics and Gynecology, University of Rochester School of Medicine and Dentistry, Rochester, NY
| | - Ruby HN Nguyen
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Sheela Sathyanarayana
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
- Department of Pediatrics, School of Medicine, University of Washington, Seattle, WA
- Seattle Children’s Research Institute, Seattle, WA
| | - Kaja Z LeWinn
- Department of Psychiatry and Behavioral Sciences, School of Medicine, University of California, San Francisco, San Francisco, CA
| | - Nicole R Bush
- Department of Psychiatry and Pediatrics, School of Medicine, University of California, San Francisco, San Francisco, CA
| | - Joel D Kaufman
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA
- Department of Medicine, School of Medicine, University of Washington; Seattle, WA
| | - Catherine J Karr
- From the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA
- Department of Pediatrics, School of Medicine, University of Washington, Seattle, WA
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA
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5
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Outdoor Air Pollution and Childhood Respiratory Disease: The Role of Oxidative Stress. Int J Mol Sci 2023; 24:ijms24054345. [PMID: 36901776 PMCID: PMC10001616 DOI: 10.3390/ijms24054345] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/18/2023] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
The leading mechanisms through which air pollutants exert their damaging effects are the promotion of oxidative stress, the induction of an inflammatory response, and the deregulation of the immune system by reducing its ability to limit infectious agents' spreading. This influence starts in the prenatal age and continues during childhood, the most susceptible period of life, due to a lower efficiency of oxidative damage detoxification, a higher metabolic and breathing rate, and enhanced oxygen consumption per unit of body mass. Air pollution is involved in acute disorders like asthma exacerbations and upper and lower respiratory infections, including bronchiolitis, tuberculosis, and pneumoniae. Pollutants can also contribute to the onset of chronic asthma, and they can lead to a deficit in lung function and growth, long-term respiratory damage, and eventually chronic respiratory illness. Air pollution abatement policies, applied in the last decades, are contributing to mitigating air quality issues, but more efforts should be encouraged to improve acute childhood respiratory disease with possible positive long-term effects on lung function. This narrative review aims to summarize the most recent studies on the links between air pollution and childhood respiratory illness.
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6
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Atkinson CE, Kesic MJ, Hernandez ML. Ozone in the Development of Pediatric Asthma and Atopic Disease. Immunol Allergy Clin North Am 2022; 42:701-713. [PMID: 36265970 PMCID: PMC10519373 DOI: 10.1016/j.iac.2022.06.001] [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] [Indexed: 11/05/2022]
Abstract
Ozone (O3) is a ubiquitous outdoor air pollutant, which may be derived from various primary pollutants such as nitrates, hydrocarbons, and volatile organ compounds through ultraviolet radiation exposure, and has been shown to negatively impact respiratory health. O3 is the most common noninfectious environmental cause of asthma exacerbations among children and adults. Its effects on pediatric respiratory health could be due to multiple physiologic factors that may contribute to enhanced O3 exposure seen in children compared with adults, including differences in lung surface area per unit of body weight and ventilation rates. O3 can reach the distal regions of human lungs due to its low water solubility, resulting in either injury or activation of airway epithelial cells and macrophages. Multiple epidemiologic studies have highlighted a link between exposure to air pollution and the development of asthma. This review article specifically focuses on examining the impact of early life O3 exposure on lung development, lung function, and the risk of developing atopic diseases including asthma, allergic rhinitis, and atopic dermatitis among children.
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Affiliation(s)
- Claire E Atkinson
- Division of Allergy & Immunology, Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Matthew J Kesic
- Campbell University College of Pharmacy & Health Sciences, Physician Assistant Program, Buies Creek, NC, USA
| | - Michelle L Hernandez
- Division of Allergy & Immunology, Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, NC, USA.
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7
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Balmes JR. Long-term Exposure to Ozone and Small Airways, a Large Impact? Am J Respir Crit Care Med 2022; 205:384-385. [PMID: 35007495 PMCID: PMC8886953 DOI: 10.1164/rccm.202112-2733ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- John R. Balmes
- University of California, Berkeley, Environmental Health Sciences, School of Public Health, Berkeley, California, United States
- University of California, San Francisco, Department of Medicine, San Francisco, California, United States
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8
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Association between Glucose-6-Phosphate Dehydrogenase Deficiency and Asthma. J Clin Med 2021; 10:jcm10235639. [PMID: 34884340 PMCID: PMC8658649 DOI: 10.3390/jcm10235639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 12/12/2022] Open
Abstract
Background: Among the determinants contributing to the pathogenesis of asthma, antioxidant genetic factors play a leading role. Glucose-6-phosphate dehydrogenase (G6PD) is an enzyme that is competent to detoxify free radicals. Although a relationship between G6PD deficiency and asthma has been previously reported, the literature is still scanty. In this study, we test this hypothesis in a large cohort of patients from Sardinia, Italy. Methods: A retrospective case–control study was performed using data from 11,829 clinical records of outpatients referred to a teaching hospital for a medical visit. In total, 455 cases (asthma-positive) and 11,374 controls (asthma-negative) were compared for G6PD status using multivariable analysis, adjusting for all covariates. Results: Overall, G6PD deficiency was detected in 11.2% of study participants and was associated with an increased risk of asthma (odds ratio (OR) 1.63; 95% confidence interval (CI) 1.27–2.10). Additional variables significantly associated with asthma were female sex (OR 1.66; 95% CI 1.34–2.06), overweight/obesity (OR 1.56; 95% CI 1.27–1.92), smoking (OR 1.44; 95% CI 1.449–3.963), and high socioeconomic status (OR 1.40; 95% CI 1.16–1.70), whereas age was inversely related with asthma (OR 0.49; 95% CI 0.39–0.61). Conclusions: Our study shows that G6PD deficiency is an independent risk for asthma. These findings suggest that G6PD should be assessed in asthmatic patients for better risk stratification.
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Niu Y, Yang T, Gu X, Chen R, Meng X, Xu J, Yang L, Zhao J, Zhang X, Bai C, Kang J, Ran P, Shen H, Wen F, Huang K, Chen Y, Sun T, Shan G, Lin Y, Wu S, Zhu J, Wang R, Shi Z, Xu Y, Ye X, Song Y, Wang Q, Zhou Y, Ding L, Yang T, Yao W, Guo Y, Xiao F, Lu Y, Peng X, Zhang B, Xiao D, Wang Z, Zhang H, Bu X, Zhang X, An L, Zhang S, Cao Z, Zhan Q, Yang Y, Liang L, Cao B, Dai H, Wu T, He J, Li H, Kan H, Wang C. Long-term Ozone Exposure and Small Airways Dysfunction: The China Pulmonary Health (CPH) Study. Am J Respir Crit Care Med 2021; 205:450-458. [PMID: 34813411 DOI: 10.1164/rccm.202107-1599oc] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
RATIONALE It remains unknown whether long-term ozone exposure can impair lung function. OBJECTIVES To investigate the associations between long-term ozone exposure and adult lung function in China. METHODS Lung function results and diagnosis of small airways dysfunction (SAD) were collected from a cross-sectional study, China Pulmonary Health Study (N=50,991). We used multivariate linear and logistic regression models to examine the associations of long-term ozone exposure with lung function parameters and SAD, respectively, adjusting for demographic characteristics, individual risk factors, and longitudinal trend. We then performed a stratification analysis by chronic obstructive pulmonary disease (COPD). MEASUREMENTS AND MAIN RESULTS We observed each 1-standard deviation (SD, 4.9 ppb) increase in warm-season ozone concentrations was associated with a 14.2 mL/s [95% confidence interval (CI): 8.8, 19.6] decrease in forced expiratory flow at 75th percentile of vital capacity and a 29.5 mL/s (95% CI: 19.6, 39.5) decrease in mean forced expiratory flow between the 25th and 75th percentile of vital capacity. The odds ratio of SAD was 1.09 (95% CI: 1.06, 1.11) for a 1-SD increase in warm-season ozone concentrations. Meanwhile, we observed a significant association with a decreased ratio of expiratory volume in 1 second to forced vital capacity (FEV1/FVC) but not with FEV1 or FVC. The association estimates were greater in the COPD group than in the non-COPD group. CONCLUSION We found independent associations of long-term ozone exposure with impaired small airways function and higher SAD risks, while the associations with airflow obstruction were weak. COPD patients appear to be more vulnerable.
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Affiliation(s)
- Yue Niu
- Fudan University, 12478, Shanghai, China
| | - Ting Yang
- National Clinical Research Center for Respiratory Diseases, Center for Respiratory Diseases, China-Japan Friendship Hospital; Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital; Peking University Health Science Center, Beijing, China
| | - Xiaoying Gu
- China-Japan Friendship Hospital, Beijing, China
| | - Renjie Chen
- School of Public Health, Fudan University, Shanghai, China
| | - Xia Meng
- Fudan University, 12478, Shanghai, China
| | | | - Lan Yang
- The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jianping Zhao
- Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Department of Respiratory and Critical Care Medicine, Wuhan, China
| | | | - Chunxue Bai
- Zhongshan Hospital, Fudan University, Pulmonary medicnie, Shanghai, China
| | - Jian Kang
- The First Hospital of China Medical University, Shenyang, China
| | - Pixin Ran
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Huahao Shen
- Zhejiang University School of Medicine, Respiratory and Critical Care Medicine, Hangzhou, China.,State Key Lab for Respiratory Diseases, Guangzhou, China
| | - Fuqiang Wen
- West China Hospital of Sichuan University, Chengdu, China
| | - Kewu Huang
- Capital Medical University, 12517, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Beijing, China
| | - Yahong Chen
- Peking University,Third Hospital, Respiratory Department, Beijing, China
| | | | - Guangliang Shan
- Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Basic Medical Sciences, 196536, Beijing, China
| | | | - Sinan Wu
- China-Japan Friendship Hospital, 36635, Beijing, China
| | - Jianguo Zhu
- National Center of Gerontology, Beijing, China
| | | | - Zhihong Shi
- The First Affiliated Hospital of Xi'an Jiaotong University, xi'an, China
| | - Yongjian Xu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China
| | - Xianwei Ye
- Guizhou Provincial People's Hospital, Guiyang, China
| | - Yuanlin Song
- Zhongshan Hospital, Fudan University, Department of Pulmonary medicnie, Shanghai, China
| | - Qiuyue Wang
- The First Hospital of China Medical University, 159407, Department of Pulmonary and Critical Care Medicine, Shenyang, China
| | - Yumin Zhou
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou Institute of Respiratory Diseases, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital, Department of Laboratory Medicine, Guangzhou, China
| | - Liren Ding
- Zhejiang University School of Medicine Second Affiliated Hospital, 89681, Hangzhou, China
| | - Ting Yang
- Sichuan University West China Hospital, 34753, Chengdu, China
| | - Wanzhen Yao
- Peking University,Third Hospital, Respiratory Department, Beijing, China
| | - Yanfei Guo
- Beijing Hospital, Department of Pulmonary and Critical Care Medicine, Beijing, China
| | - Fei Xiao
- Beijing Hospital, Beijing Institute of Geriatrics, Beijing, China
| | - Yong Lu
- Beijing Chao-Yang Hospital, Department of Pulmonary and Critical Care Medicine, Beijing, China.,Beijing Institute of Respiratory Diseases, 74699, Department of Pulmonary and Critical Care Medicine, Beijing, China
| | - Xiaoxia Peng
- Beijing Children's Hospital, 117984, Beijing, China
| | - Biao Zhang
- Peking Union Medical College School of Basic Medicine, 196536, Beijing, China
| | - Dan Xiao
- China-Japan Friendship Hospital, 36635, Beijing, China
| | - Zuomin Wang
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Hong Zhang
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Xiaoning Bu
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Xiaolei Zhang
- China-Japan Friendship Hospital, 36635, Beijing, China
| | - Li An
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Shu Zhang
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Zhixin Cao
- Beijing Chao-Yang Hospital, 74639, Beijing, China
| | - Qingyuan Zhan
- China-Japan Friendship Hospital, 36635, Beijing, China
| | - Yuanhua Yang
- Beijing Chao Yang Hospital,Capital Medical University, Beijing Institute of Respiratory Medicine, Beijing, China
| | - Lirong Liang
- Beijing Institute of Respiratory Medicine, Beijing, China
| | - Bin Cao
- Beijing Chao-Yang Hospital, Beijing Institute of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Huaping Dai
- Beijing Chao Yang Hospital,Capital Medical University, Beijing Institute of Respiratory Medicine, Beijing, China
| | - Tangchun Wu
- Tongji Medical College, HUST, Institute of Occupational Medicine, Wuhan, China
| | - Jiang He
- Tulane University School of Public Health and Tropical Medicine, Epidemiology, New Orleans, Louisiana, United States
| | - Huichu Li
- Harvard University, 1812, Cambridge, Massachusetts, United States
| | - Haidong Kan
- Fudan University, 12478, Department of Environmental Health, Shanghai, China
| | - Chen Wang
- Beijing Chaoyang Hospital-Affiliate of Capital University of Medical Sciences, Beijing, China;
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10
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Sly PD, Vilcins D. Climate impacts on air quality and child health and wellbeing: Implications for Oceania. J Paediatr Child Health 2021; 57:1805-1810. [PMID: 34792251 DOI: 10.1111/jpc.15650] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 07/07/2021] [Indexed: 12/30/2022]
Abstract
Despite the enormous gains in reducing child mortality resulting from the United Nations Millennium Development Goals, in some ways children's future wellbeing has never been under greater threat. Climate and environmental change, primarily driven by poor air quality, represents a major threat to child health and wellbeing, through both direct and indirect effects. Climate change has multiple environmental consequences impacting negatively on child health and wellbeing, including increases in ambient temperature, rising atmospheric carbon dioxide (CO2) , altered distribution of rainfall, ocean warming, rising sea level and more frequent and severe adverse weather events. Multiple pathways link these exposures to a wide variety of adverse health outcomes. Countries in Oceania are especially likely to be subjected to the effects of increases in ambient temperature, altered distribution of rainfall, ocean warming and sea level rise. These changes pose a significant risk to children and provide a moral imperative for us to act to protect child health.
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Affiliation(s)
- Peter D Sly
- Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Dwan Vilcins
- Child Health Research Centre, Faculty of Medicine, The University of Queensland, Brisbane, Australia
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11
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Air pollution and lung function in children. J Allergy Clin Immunol 2021; 148:1-14. [PMID: 34238501 DOI: 10.1016/j.jaci.2021.05.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/30/2021] [Accepted: 05/06/2021] [Indexed: 11/21/2022]
Abstract
In this narrative review, we summarize the literature and provide updates on recent studies of air pollution exposures and child lung function and lung function growth. We include exposures to outdoor air pollutants that are monitored and regulated through air quality standards, and air pollutants that are not routinely monitored or directly regulated, including wildfires, indoor biomass and coal burning, gas and wood stove use, and volatile organic compounds. Included is a more systematic review of the recent literature on long-term air pollution and child lung function because this is an indicator of future adult respiratory health and exposure assessment tools have improved dramatically in recent years. We present "summary observations" and "knowledge gaps." We end by discussing what is known about what can be done at the individual/household, local/regional, and national levels to overcome structural impediments, reduce air pollution exposures, and improve child lung function. We found a large literature on adverse air pollution effects on children's lung function level and growth; however, many questions remain. Important areas needing further research include whether early-life effects are fixed or reversible; and what are windows of increased susceptibility, long-term effects of repeated wildfire events, and effects of air quality interventions.
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12
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Xu A, Liu C, Wan Y, Bai Y, Li Z. Monkeys fight more in polluted air. Sci Rep 2021; 11:654. [PMID: 33436838 PMCID: PMC7804853 DOI: 10.1038/s41598-020-80002-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 12/11/2020] [Indexed: 11/09/2022] Open
Abstract
Air pollution is a global environmental problem, and its effects on human behavior, psychology, and health have been well studied. However, very few studies were done on if and how air pollution affects animal behavior, for example, social conflict. Many physiological and psychological evidences suggest a possible positive relationship between air pollution and animal social conflict, thus we established a multiple linear regression model using a captive monkey group to explore if monkeys behave more aggressively in polluted air. Our results confirmed that daily social fighting behaviors occurred more when air is polluted. Temperature has a nonlinear effect on monkey social conflict, with a fighting peak at 25-29 °C. To our knowledge, this is the first report that animal social conflict, like humans, is also affected by air pollution and temperature.
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Affiliation(s)
- Aichun Xu
- College of Life Sciences, China Jiliang University, Hangzhou, 301118, China
| | - Chunhong Liu
- Lab of Animal Behavior & Conservation, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yue Wan
- Lab of Animal Behavior & Conservation, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Yali Bai
- Lab of Animal Behavior & Cognition, Nanjing Hongshan Forest Zoo, Nanjing, 210023, China
| | - Zhongqiu Li
- Lab of Animal Behavior & Conservation, School of Life Sciences, Nanjing University, Nanjing, 210023, China. .,Lab of Animal Behavior & Cognition, Nanjing Hongshan Forest Zoo, Nanjing, 210023, China.
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13
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Pabst R, Miller LA, Schelegle E, Hyde DM. Organized lymphatic tissue (BALT) in lungs of rhesus monkeys after air pollutant exposure. Anat Rec (Hoboken) 2020; 303:2766-2773. [PMID: 32445535 PMCID: PMC8793891 DOI: 10.1002/ar.24456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 03/10/2020] [Accepted: 03/23/2020] [Indexed: 11/09/2022]
Abstract
The presence of bronchus-associated lymphoid tissue (BALT) and its size in humans largely depends upon age. It is detected in 35% of children less than 2 years of age, but absent in the healthy adult lung. Environmental gases or allergens may have an effect on the number of BALT. Lungs of rhesus macaque monkeys were screened by histology for the presence, size, and location of BALT after exposure to filtered air for 2, 6, 12, or 36 months or 12 and 36 months to ozone or 2, 12, or 36 months of house dust mite or a combination of ozone and house dust mite for 12 months. In the lungs of monkeys housed in filtered air for 2 months, no BALT was identified. After 6, 12, or 36 months, the number of BALT showed a significantly increased correlation with age in monkeys housed in filtered air. After 2 months of episodic house dust mite (HDM) exposure, no BALT was found. Monkeys exposed to HDM or HDM + ozone did not show a significant increase in BALT compared to monkeys housed in filtered air. However, monkeys exposed to ozone alone did show significant increases in BALT compared to all other groups. In particular, there were frequent accumulations of lymphocytes in the periarterial space of ozone exposed animals. In conclusion, BALT in rhesus monkeys housed under filtered air conditions is age-dependent. BALT significantly increased in monkeys exposed to ozone in comparison with monkeys exposed to HDM.
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Affiliation(s)
- Reinhard Pabst
- Institute of Immunomorphology, Centre of Anatomy, Medical School of Hannover, Hannover, Germany
| | - Lisa A. Miller
- California National Primate Research Center, Davis, California, USA
| | - Edward Schelegle
- California National Primate Research Center, Davis, California, USA
| | - Dallas M. Hyde
- California National Primate Research Center, Davis, California, USA
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14
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Thurston GD, Balmes JR, Garcia E, Gilliland FD, Rice MB, Schikowski T, Van Winkle LS, Annesi-Maesano I, Burchard EG, Carlsten C, Harkema JR, Khreis H, Kleeberger SR, Kodavanti UP, London SJ, McConnell R, Peden DB, Pinkerton KE, Reibman J, White CW. Outdoor Air Pollution and New-Onset Airway Disease. An Official American Thoracic Society Workshop Report. Ann Am Thorac Soc 2020; 17:387-398. [PMID: 32233861 PMCID: PMC7175976 DOI: 10.1513/annalsats.202001-046st] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Although it is well accepted that air pollution exposure exacerbates preexisting airway disease, it has not been firmly established that long-term pollution exposure increases the risk of new-onset asthma or chronic obstruction pulmonary disease (COPD). This Workshop brought together experts on mechanistic, epidemiological, and clinical aspects of airway disease to review current knowledge regarding whether air pollution is a causal factor in the development of asthma and/or COPD. Speakers presented recent evidence in their respective areas of expertise related to air pollution and new airway disease incidence, followed by interactive discussions. A writing committee summarized their collective findings. The Epidemiology Group found that long-term exposure to air pollution, especially metrics of traffic-related air pollution such as nitrogen dioxide and black carbon, is associated with onset of childhood asthma. However, the evidence for a causal role in adult-onset asthma or COPD remains insufficient. The Mechanistic Group concluded that air pollution exposure can cause airway remodeling, which can lead to asthma or COPD, as well as asthma-like phenotypes that worsen with long-term exposure to air pollution, especially fine particulate matter and ozone. The Clinical Group concluded that air pollution is a plausible contributor to the onset of both asthma and COPD. Available evidence indicates that long-term exposure to air pollution is a cause of childhood asthma, but the evidence for a similar determination for adult asthma or COPD remains insufficient. Further research is needed to elucidate the exact biological mechanism underlying incident childhood asthma, and the specific air pollutant that causes it.
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15
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Maglione GA, Kurtz ML, Orona NS, Astort F, Busso IT, Mandalunis PM, Berra A, Tasat DR. Chronic exposure to urban air pollution from Buenos Aires: the ocular mucosa as an early biomarker. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:27444-27456. [PMID: 31327144 DOI: 10.1007/s11356-019-05966-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Air pollution represents a major health problem in megacities, bringing about 8 million deaths every year. The aim of the study was to evaluate in vivo the ocular and respiratory mucosa biological response after chronic exposure to urban air particles from Buenos Aires (UAP-BA). BALB/c mice were exposed to UAP-BA or filtered air for 1, 6, 9, and 12 months. After exposure, histology, histomorphometry, and IL-6 proinflammatory cytokine level were evaluated in the respiratory and ocular mucosa. Total cell number and differential cell count were determined in the brochoalveolar lavage fluid. In the lung, chronic exposure to UAP-BA induced reduction of the alveolar space, polymorhonuclear cell recruitment, and goblet cell hyperplasia. In the ocular surface, UAP-BA induced an initial mucin positive cells rise followed by a decline through time, while IL-6 level increased at the latest point-time assayed. Our results showed that the respiratory and the ocular mucosas respond differently to UAP-BA. Being that lung and ocular mucosa diseases may be triggered and/or exacerbated by chronic exposure to urban air PM, the inhabitants of Buenos Aires whom are chronically exposed to environmental urban air pollution may be considered a subpopulation at risk. Based on our results, we propose the ocular mucosa as a reliable and more accessible surrogate for pulmonary mucosa environmental toxicity that might also serve as an earlier biomarker for air pollution adverse impact on health.
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Affiliation(s)
- Guillermo A Maglione
- Center for the Studies in Health and Environment, School of Science and Technology, National University of San Martin, Martín de Irigoyen 3100, 1653, San Martín, Buenos Aires, Argentina
- Department of Histology and Embryology, School of Dentistry, University of Buenos Aires, Marcelo T. de Alvear 2142, C1122AAH, Autonomous City of Buenos Aires, Argentina
| | - Melisa L Kurtz
- Center for the Studies in Health and Environment, School of Science and Technology, National University of San Martin, Martín de Irigoyen 3100, 1653, San Martín, Buenos Aires, Argentina.
- National Research Council (CONICET), Godoy Cruz 2290, C1425FQB, Autonomous City of Buenos Aires, Argentina.
| | - Nadia S Orona
- Center for the Studies in Health and Environment, School of Science and Technology, National University of San Martin, Martín de Irigoyen 3100, 1653, San Martín, Buenos Aires, Argentina
- National Research Council (CONICET), Godoy Cruz 2290, C1425FQB, Autonomous City of Buenos Aires, Argentina
| | - Francisco Astort
- Center for the Studies in Health and Environment, School of Science and Technology, National University of San Martin, Martín de Irigoyen 3100, 1653, San Martín, Buenos Aires, Argentina
- National Research Council (CONICET), Godoy Cruz 2290, C1425FQB, Autonomous City of Buenos Aires, Argentina
| | - Iván Tavera Busso
- National Research Council (CONICET), Godoy Cruz 2290, C1425FQB, Autonomous City of Buenos Aires, Argentina
- Institute for Multidisciplinary Plant Biology, National University of Córdoba, Av. Vélez Sarsfield 299, X5000JJC, Córdoba City, Argentina
| | - Patricia M Mandalunis
- Department of Histology and Embryology, School of Dentistry, University of Buenos Aires, Marcelo T. de Alvear 2142, C1122AAH, Autonomous City of Buenos Aires, Argentina
| | - Alejandro Berra
- Department of Pathology, School of Medicine, University of Buenos Aires, Paraguay 2155, C1121ABG, Autonomous City of Buenos Aires, Argentina
| | - Deborah R Tasat
- Center for the Studies in Health and Environment, School of Science and Technology, National University of San Martin, Martín de Irigoyen 3100, 1653, San Martín, Buenos Aires, Argentina
- Department of Histology and Embryology, School of Dentistry, University of Buenos Aires, Marcelo T. de Alvear 2142, C1122AAH, Autonomous City of Buenos Aires, Argentina
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16
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Zu K, Shi L, Prueitt RL, Liu X, Goodman JE. Critical review of long-term ozone exposure and asthma development. Inhal Toxicol 2019; 30:99-113. [PMID: 29869579 DOI: 10.1080/08958378.2018.1455772] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Asthma, a chronic respiratory disorder with complex etiology and various phenotypes, is a considerable public health concern in the USA and worldwide. While there is evidence suggesting ambient ozone exposure may exacerbate asthma, information regarding the potential role of ozone in asthma development is more limited. Thus, we conducted a critical review of observational epidemiology studies to determine whether long-term ambient ozone exposure is a risk factor for asthma development. We identified 14 relevant studies; 11 evaluated asthma development in children, while three studies, based on a single cohort, assessed this outcome in adults. Studies of childhood asthma and long-term ozone exposure - including exposure in utero, during the first year of life and during early childhood - reported inconsistent findings, which were further weakened by critical methodological limitations in statistical analyses and in exposure and outcome assessments, such as exposure measurement error and a lack of adjustment for key confounders. For adult-onset asthma, long-term ozone exposure was associated with an increased risk in men but not women. In addition to considerable uncertainties due to potential exposure measurement error and a lack of adjustment for key confounders, this study has limited generalizability to the US general population. While experimental evidence indicates that it may be biologically plausible that long-term ozone exposure could contribute to asthma development, it does not provide insight regarding an established mode of action. Future research is needed to address the uncertainties regarding the role of long-term ambient ozone exposure in asthma development.
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Affiliation(s)
- Ke Zu
- a Gradient , Cambridge , MA , USA
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17
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Miller LA, Royer CM, Pinkerton KE, Schelegle ES. Nonhuman Primate Models of Respiratory Disease: Past, Present, and Future. ILAR J 2018; 58:269-280. [PMID: 29216343 PMCID: PMC5886323 DOI: 10.1093/ilar/ilx030] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 10/19/2017] [Indexed: 12/13/2022] Open
Abstract
The respiratory system consists of an integrated network of organs and structures that primarily function for gas exchange. In mammals, oxygen and carbon dioxide are transmitted through a complex respiratory tract, consisting of the nasal passages, pharynx, larynx, and lung. Exposure to ambient air throughout the lifespan imposes vulnerability of the respiratory system to environmental challenges that can contribute toward development of disease. The importance of the respiratory system to human health is supported by statistics from the Centers for Disease Control and Prevention; in 2015, chronic lower respiratory diseases were the third leading cause of death in the United States. In light of the significant mortality associated with respiratory conditions that afflict all ages of the human population, this review will focus on basic and preclinical research conducted in nonhuman primate models of respiratory disease. In comparison with other laboratory animals, the nonhuman primate lung most closely resembles the human lung in structure, physiology, and mucosal immune mechanisms. Studies defining the influence of inhaled microbes, pollutants, or allergens on the nonhuman primate lung have provided insight on disease pathogenesis, with the potential for elucidation of molecular targets leading to new treatment modalities. Vaccine trials in nonhuman primates have been crucial for confirmation of safety and protective efficacy against infectious diseases of the lung in a laboratory animal model that recapitulates pathology observed in humans. In looking to the future, nonhuman primate models of respiratory diseases will continue to be instrumental for translating biomedical research for improvement of human health.
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Affiliation(s)
- Lisa A Miller
- Department of Anatomy, Physiology & Cell Biology, UC Davis School of Veterinary Medicine, University of California, Davis, California
| | - Christopher M Royer
- California National Primate Research Center, University of California, Davis, California
| | - Kent E Pinkerton
- Department of Anatomy, Physiology & Cell Biology, UC Davis School of Veterinary Medicine and Department of Pediatrics, UC Davis School of Medicine, University of California, Davis, California
| | - Edward S Schelegle
- Department of Anatomy, Physiology & Cell Biology, UC Davis School of Veterinary Medicine, University of California, Davis, California
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18
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de Barros Mendes Lopes T, Groth EE, Veras M, Furuya TK, de Souza Xavier Costa N, Ribeiro Júnior G, Lopes FD, de Almeida FM, Cardoso WV, Saldiva PHN, Chammas R, Mauad T. Pre- and postnatal exposure of mice to concentrated urban PM 2.5 decreases the number of alveoli and leads to altered lung function at an early stage of life. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 241:511-520. [PMID: 29883952 PMCID: PMC6407120 DOI: 10.1016/j.envpol.2018.05.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 05/15/2018] [Accepted: 05/17/2018] [Indexed: 05/21/2023]
Abstract
Gestational exposure to air pollution is associated with negative outcomes in newborns and children. In a previous study, we demonstrated a synergistic negative effect of pre- and postnatal exposure to PM2.5 on lung development in mice. However, the means by which air pollution affects development of the lung have not yet been identified. In this study, we exposed pregnant BALB/c mice and their offspring to concentrated urban PM2.5 (from São Paulo, Brazil; target dose 600 μg/m3 for 1 h daily). Exposure was started on embryonic day 5.5 (E5.5, time of placental implantation). Lung tissue of fetuses and offspring was submitted to stereological and transcriptomic analyses at E14.5 (pseudoglandular stage of lung development), E18.5 (saccular stage) and P40 (postnatal day 40, alveolarized lung). Additionally, lung function and cellularity of bronchoalveolar lavage (BAL) fluid were studied in offspring animals at P40. Compared to control animals that were exposed to filtered air throughout gestation and postnatal life, PM-exposed mice exhibited higher lung elastance and a lower alveolar number at P40 whilst the total lung volume and cellularity of BAL fluid were not affected. Glandular and saccular structures of fetal lungs were not altered upon gestational exposure; transcriptomic signatures, however, showed changes related to DNA damage and its regulation, inflammation and regulation of cell proliferation. A differential expression was validated at E14.5 for the candidates Sox8, Angptl4 and Gas1. Our data substantiate the in utero biomolecular effect of gestational exposure to air pollution and provide first-time stereological evidence that pre- and early life-postnatal exposure compromise lung development, leading to a reduced number of alveoli and an impairment of lung function in the adult mouse.
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Affiliation(s)
- Thais de Barros Mendes Lopes
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Espen E Groth
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Mariana Veras
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Tatiane K Furuya
- Center of Translational Research in Oncology (LIM24), Instituto do Cancer do Estado de Sao Paulo (ICESP), Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 251, 01246-000, São Paulo, SP, Brazil
| | - Natalia de Souza Xavier Costa
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Gabriel Ribeiro Júnior
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Fernanda Degobbi Lopes
- Laboratory of Experimental Therapeutics (LIM20), Department of Medicine, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Francine M de Almeida
- Laboratory of Experimental Therapeutics (LIM20), Department of Medicine, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Wellington V Cardoso
- Columbia Center for Human Development, Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine, Columbia University Medical Center, 630 W 168th St, New York, NY, 10032, USA
| | - Paulo Hilario Nascimento Saldiva
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil
| | - Roger Chammas
- Center of Translational Research in Oncology (LIM24), Instituto do Cancer do Estado de Sao Paulo (ICESP), Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 251, 01246-000, São Paulo, SP, Brazil
| | - Thais Mauad
- Laboratory of Experimental Air Pollution (LIM05), Department of Pathology, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Av. Dr. Arnaldo, 455, 01246-903, Sao Paulo, SP, Brazil.
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19
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Nikolić MZ, Sun D, Rawlins EL. Human lung development: recent progress and new challenges. Development 2018; 145:145/16/dev163485. [PMID: 30111617 PMCID: PMC6124546 DOI: 10.1242/dev.163485] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Recent studies have revealed biologically significant differences between human and mouse lung development, and have reported new in vitro systems that allow experimental manipulation of human lung models. At the same time, emerging clinical data suggest that the origins of some adult lung diseases are found in embryonic development and childhood. The convergence of these research themes has fuelled a resurgence of interest in human lung developmental biology. In this Review, we discuss our current understanding of human lung development, which has been profoundly influenced by studies in mice and, more recently, by experiments using in vitro human lung developmental models and RNA sequencing of human foetal lung tissue. Together, these approaches are helping to shed light on the mechanisms underlying human lung development and disease, and may help pave the way for new therapies. Summary: This Review describes how recent technological advances have shed light on the mechanisms underlying human lung development and disease, and outlines the future challenges in this field.
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Affiliation(s)
- Marko Z Nikolić
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK.,University of Cambridge School of Clinical Medicine, Department of Medicine, Cambridge CB2 0QQ, UK
| | - Dawei Sun
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK
| | - Emma L Rawlins
- Wellcome Trust/CRUK Gurdon Institute, Wellcome Trust/MRC Stem Cell Institute, Department of Pathology, University of Cambridge, Cambridge CB2 1QN, UK
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20
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Nuvolone D, Petri D, Voller F. The effects of ozone on human health. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:8074-8088. [PMID: 28547375 DOI: 10.1007/s11356-017-9239-3] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/09/2017] [Indexed: 04/16/2023]
Abstract
Ozone is a highly reactive, oxidative gas associated with adverse health outcome, including mortality and morbidity. Data from monitoring sites worldwide show levels of ozone often exceeding EU legislation threshold and the more restrictive WHO guidelines for the protection of human health. Well-established evidence has been produced for short-term effects, especially on respiratory and cardiovascular systems, associated to ozone exposure. Less conclusive is the evidence for long-term effects, reporting suggestive associations with respiratory mortality, new-onset asthma in children and increased respiratory symptom effects in asthmatics. The growing epidemiological evidence and the increasing availability of routinely collected data on air pollutant concentrations and health statistics allow to produce robust estimates in health impact assessment routine. Most recent estimates indicate that in 2013 in EU-28, 16,000 premature deaths, equivalent to 192,000 years of life lost, are attributable to ozone exposure. Italy shows very high health impact estimates among EU countries, reporting 3380 premature deaths and 61 years of life lost (per 100,000 inhabitants) attributable to ozone exposure.
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Affiliation(s)
- Daniela Nuvolone
- Unit of Epidemiology, Regional Health Agency of Tuscany, via Pietro Dazzi 1, Florence, Italy.
| | - Davide Petri
- Unit of Epidemiology, Regional Health Agency of Tuscany, via Pietro Dazzi 1, Florence, Italy
| | - Fabio Voller
- Unit of Epidemiology, Regional Health Agency of Tuscany, via Pietro Dazzi 1, Florence, Italy
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21
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Affiliation(s)
- Joel Schwartz
- 1 Department of Environmental Health Harvard T. H. Chan School of Public Health Boston, Massachusetts
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22
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23
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Black C, Tesfaigzi Y, Bassein JA, Miller LA. Wildfire smoke exposure and human health: Significant gaps in research for a growing public health issue. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 55:186-195. [PMID: 28892756 PMCID: PMC5628149 DOI: 10.1016/j.etap.2017.08.022] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 08/26/2017] [Indexed: 05/02/2023]
Abstract
Understanding the effect of wildfire smoke exposure on human health represents a unique interdisciplinary challenge to the scientific community. Population health studies indicate that wildfire smoke is a risk to human health and increases the healthcare burden of smoke-impacted areas. However, wildfire smoke composition is complex and dynamic, making characterization and modeling difficult. Furthermore, current efforts to study the effect of wildfire smoke are limited by availability of air quality measures and inconsistent air quality reporting among researchers. To help address these issues, we conducted a substantive review of wildfire smoke effects on population health, wildfire smoke exposure in occupational health, and experimental wood smoke exposure. Our goal was to evaluate the current literature on wildfire smoke and highlight important gaps in research. In particular we emphasize long-term health effects of wildfire smoke, recovery following wildfire smoke exposure, and health consequences of exposure in children.
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Affiliation(s)
- Carolyn Black
- California National Primate Research Center, United States
| | | | - Jed A Bassein
- California National Primate Research Center, United States
| | - Lisa A Miller
- California National Primate Research Center, United States; Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, CA, United States.
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Lewin G, Hurtt ME. Pre- and Postnatal Lung Development: An Updated Species Comparison. Birth Defects Res 2017; 109:1519-1539. [PMID: 28876535 DOI: 10.1002/bdr2.1089] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 06/21/2017] [Indexed: 11/10/2022]
Abstract
The purpose of this review is to give an outline of respiratory tract morphological and functional development with an emphasis on perinatal and postnatal maturational processes. In view of the rising need for qualitative and quantitative data for the development of pediatric pharmaceuticals, a comparison of the human situation to experimental animal models is made, and functional data as well as suitable models for human airway diseases and functional testing are presented. Birth Defects Research 109:1519-1539, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
| | - Mark E Hurtt
- Pfizer Global Research & Development, Groton, Connecticut
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25
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Black C, Gerriets JE, Fontaine JH, Harper RW, Kenyon NJ, Tablin F, Schelegle ES, Miller LA. Early Life Wildfire Smoke Exposure Is Associated with Immune Dysregulation and Lung Function Decrements in Adolescence. Am J Respir Cell Mol Biol 2017; 56:657-666. [PMID: 28208028 DOI: 10.1165/rcmb.2016-0380oc] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The long-term health effects of wildfire smoke exposure in pediatric populations are not known. The objectives of this study were to determine if early life exposure to wildfire smoke can affect parameters of immunity and airway physiology that are detectable with maturity. We studied a mixed-sex cohort of rhesus macaque monkeys that were exposed as infants to ambient wood smoke from a series of Northern California wildfires in the summer of 2008. Peripheral blood mononuclear cells (PBMCs) and pulmonary function measures were obtained when animals were approximately 3 years of age. PBMCs were cultured with either LPS or flagellin, followed by measurement of secreted IL-8 and IL-6 protein. PBMCs from a subset of female animals were also evaluated by Toll-like receptor (TLR) pathway mRNA analysis. Induction of IL-8 protein synthesis with either LPS or flagellin was significantly reduced in PBMC cultures from wildfire smoke-exposed female monkeys. In contrast, LPS- or flagellin-induced IL-6 protein synthesis was significantly reduced in PBMC cultures from wildfire smoke-exposed male monkeys. Baseline and TLR ligand-induced expression of the transcription factor, RelB, was globally modulated in PBMCs from wildfire smoke-exposed monkeys, with additional TLR pathway genes affected in a ligand-dependent manner. Wildfire smoke-exposed monkeys displayed significantly reduced inspiratory capacity, residual volume, vital capacity, functional residual capacity, and total lung capacity per unit of body weight relative to control animals. Our findings suggest that ambient wildfire smoke exposure during infancy results in sex-dependent attenuation of systemic TLR responses and reduced lung volume in adolescence.
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Affiliation(s)
| | | | | | - Richart W Harper
- 2 Division of Pulmonary and Critical Care Medicine, School of Medicine, and
| | - Nicholas J Kenyon
- 2 Division of Pulmonary and Critical Care Medicine, School of Medicine, and
| | - Fern Tablin
- 3 Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, California
| | - Edward S Schelegle
- 3 Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, California
| | - Lisa A Miller
- 1 California National Primate Research Center.,3 Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, California
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26
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Jung CR, Chen WT, Lin YT, Hwang BF. Ambient Air Pollutant Exposures and Hospitalization for Kawasaki Disease in Taiwan: A Case-Crossover Study (2000-2010). ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:670-676. [PMID: 27458717 PMCID: PMC5381970 DOI: 10.1289/ehp137] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 02/25/2016] [Accepted: 06/21/2016] [Indexed: 05/08/2023]
Abstract
BACKGROUND Kawasaki disease (KD) is an acute and multi-systemic vasculitis that occurs predominantly in infants and young children. Although the etiological agent of KD remains unclear, limited studies have reported that windborne environmental factors may trigger KD. OBJECTIVES We conducted a time-stratified case-crossover study to assess the associations between air pollutants and KD in Taiwan. METHODS We identified children < 5 years old with a diagnosis of KD from the Longitudinal Health Insurance Database 2000 (LHID2000) between 2000 and 2010. We obtained data regarding carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter with aerodynamic diameter < 10 μm (PM10), and sulfate dioxide (SO2) from 70 monitoring stations and used inverse distance weighting to calculate average daily exposures for the residential postal code of each case. We performed conditional logistic regression to estimate associations between KD and each air pollutant according to interquartile range (IQR) increases and quartiles of exposure on the day of hospitalization versus 3-4 reference days during the same month for each case. Additionally, we estimated associations with single-day exposures lagged 1-2 days. RESULTS We identified 695 KD hospital admissions during the study period. An IQR increase (28.73 ppb) of O3 was positively associated with KD after adjusting for temperature, humidity, northward wind, and eastward wind [adjusted odds ratio = 1.21; 95% confidence interval (CI): 1.01, 1.44]. There were no significant associations between KD and CO, NO2, PM10, or SO2. The association with O3 was limited to exposure on the day of hospitalization and to exposure during the summer months (June-August). CONCLUSIONS Our results provide new evidence that exposure to O3 may increase the risk of KD in children. However, further investigation is needed to confirm the association and identify a potential biological mechanism.
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Affiliation(s)
- Chau-Ren Jung
- Department of Occupational Safety and Health, and
- Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan
| | - Wei-Ting Chen
- Department of Atmospheric Science, National Taiwan University, Taipei, Taiwan
| | - Yu-Ting Lin
- Department of Occupational Safety and Health, and
- Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan
| | - Bing-Fang Hwang
- Department of Occupational Safety and Health, and
- Address correspondence to B.-F. Hwang, Department of Occupational Safety and Health, College of Public Health, China Medical University, No. 91 Hsueh-Shih Rd., Taichung, Taiwan, 40402 R.O.C. Telephone: 886-4-22053366, ext. 6208.
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Van Winkle LS, Kelty JS, Plopper CG. Preparation of Specific Compartments of the Lungs for Pathologic and Biochemical Analysis of Toxicologic Responses. ACTA ACUST UNITED AC 2017; 71:24.5.1-24.5.26. [PMID: 28146282 DOI: 10.1002/cptx.18] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This unit focuses on protocols for assessing microenvironment-specific responses in the thoracic lung tissues. Aspects of the entire respiratory system serve as potential targets for candidate toxicants, but each candidate toxicant may impact distinct sites due to differential distribution of either the toxicant or the target cells. Within the conducting airways, the composition of resident cell populations and the metabolic capabilities of the cell populations vary greatly. Thus, studies of this region of the lung require unique, site-selective methods to clearly define the toxic response. Without site-specific sampling, as described in this chapter, the experimental limit of detection for toxicant effects in conducting airways is weakened because differences unrelated to treatment, but related to location, may dominate the response. The protocols included here allow assessment of toxicological responses in the tracheobronchial airways and the gas exchange area of the lung, with specific application to laboratory mammals. © 2017 by John Wiley & Sons, Inc.
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Affiliation(s)
- Laura S Van Winkle
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, California.,John Muir Institute for the Environment, Center for Health and the Environment, University of California, Davis, California
| | - Jacklyn S Kelty
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, California.,John Muir Institute for the Environment, Center for Health and the Environment, University of California, Davis, California
| | - Charles G Plopper
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, California
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28
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Asthma as a disruption in iron homeostasis. Biometals 2016; 29:751-79. [PMID: 27595579 DOI: 10.1007/s10534-016-9948-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 07/07/2016] [Indexed: 12/28/2022]
Abstract
Over several decades, asthma has evolved from being recognized as a single disease to include a diverse group of phenotypes with dissimilar natural histories, pathophysiologies, responses to treatment, and distinctive molecular pathways. With the application of Occam's razor to asthma, it is proposed that there is one cause underlying the numerous phenotypes of this disease and that the responsible molecular pathway is a deficiency of iron in the lung tissues. This deficiency can be either absolute (e.g. asthma in the neonate and during both pregnancy and menstruation) or functional (e.g. asthma associated with infections, smoking, and obesity). Comparable associations between asthma co-morbidity (e.g. eczema, urticaria, restless leg syndrome, and pulmonary hypertension) with iron deficiency support such a shared mechanistic pathway. Therapies directed at asthma demonstrate a capacity to impact iron homeostasis, further strengthening the relationship. Finally, pathophysiologic events producing asthma, including inflammation, increases in Th2 cells, and muscle contraction, can correlate with iron availability. Recognition of a potential association between asthma and an absolute and/or functional iron deficiency suggests specific therapeutic interventions including inhaled iron.
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Malig BJ, Pearson DL, Chang YB, Broadwin R, Basu R, Green RS, Ostro B. A Time-Stratified Case-Crossover Study of Ambient Ozone Exposure and Emergency Department Visits for Specific Respiratory Diagnoses in California (2005-2008). ENVIRONMENTAL HEALTH PERSPECTIVES 2016; 124:745-53. [PMID: 26647366 PMCID: PMC4892911 DOI: 10.1289/ehp.1409495] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 11/17/2015] [Indexed: 05/03/2023]
Abstract
BACKGROUND Studies have explored ozone's connection to asthma and total respiratory emergency department visits (EDVs) but have neglected other specific respiratory diagnoses despite hypotheses relating ozone to respiratory infections and allergic responses. OBJECTIVE We examined relationships between ozone and EDVs for respiratory visits, including specifically acute respiratory infections (ARI), asthma, pneumonia, chronic obstructive pulmonary disease (COPD), and upper respiratory tract inflammation (URTI). METHODS We conducted a multi-site time-stratified case-crossover study of ozone exposures for approximately 3.7 million respiratory EDVs from 2005 through 2008 among California residents living within 20 km of an ozone monitor. Conditional logistic regression was used to estimate associations by climate zone. Random effects meta-analysis was then applied to estimate pooled excess risks (ER). Effect modification by season, distance from the monitor and individual demographic characteristics (i.e., age, race/ethnicity, sex, and payment method), and confounding by other gaseous air pollutants were also investigated. Meta-regression was utilized to explore how climate zone-level meteorological, demographic, and regional differences influenced estimates. RESULTS We observed ozone-associated increases in all respiratory, asthma, and ARI visits, which were slightly larger in the warm season [asthma ER per 10-ppb increase in mean of same and previous 3 days ozone exposure (lag03) = 2.7%, 95% CI: 1.5, 3.9; ARI ERlag03 = 1.4%, 95% CI: 0.8, 1.9]. EDVs for pneumonia, COPD, and URTI were also significantly associated with ozone exposure over the whole year, but typically more consistently so during the warm season. CONCLUSIONS Short-term ozone exposures among California residents living near an ozone monitor were positively associated with EDVs for asthma, ARI, pneumonia, COPD, and URTI from 2005 through 2008. Those associations were typically larger and more consistent during the warm season. Our findings suggest that these outcomes should be considered when evaluating the potential health benefits of reducing ozone concentrations. CITATION Malig BJ, Pearson DL, Chang YB, Broadwin R, Basu R, Green RS, Ostro B. 2016. A time-stratified case-crossover study of ambient ozone exposure and emergency department visits for specific respiratory diagnoses in California (2005-2008). Environ Health Perspect 124:745-753; http://dx.doi.org/10.1289/ehp.1409495.
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Affiliation(s)
- Brian J. Malig
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
- Address correspondence to B.J. Malig, Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, 1515 Clay St., 16th Floor, Oakland, CA 94611 USA. Telephone: (510) 622-3200. E-mail:
| | - Dharshani L. Pearson
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
| | - Yun Brenda Chang
- School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Rachel Broadwin
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
| | - Rupa Basu
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
| | - Rochelle S. Green
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
| | - Bart Ostro
- Air and Climate Epidemiology Section, California Office of Environmental Health Hazard Assessment, Oakland, California, USA
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Sack C, Goss CH. It Starts at the Beginning: Effect of Particulate Matter In Utero. Am J Respir Crit Care Med 2016; 192:1025-6. [PMID: 26517411 DOI: 10.1164/rccm.201507-1468ed] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Coralynn Sack
- 1 Department of Medicine University of Washington School of Medicine Seattle, Washington
| | - Christopher H Goss
- 1 Department of Medicine University of Washington School of Medicine Seattle, Washington.,2 Department of Pediatrics University of Washington Seattle, Washington and.,3 Seattle Children's Research Institute Seattle, Washington
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Abstract
In this review, we discuss the impact of environmental tobacco smoke and particulate and gaseous air pollutants derived from fossil fuel combustion on a particularly vulnerable population, infants and children. Indoor and outdoor air pollutants exacerbate chronic respiratory diseases and lower respiratory tract infections. However, there is an even more alarming impact of antenatal air pollution exposures. There are several reports in rodents and monkeys that maternal exposure to tobacco smoke or fossil fuel-generated air pollutants causes in utero growth retardation, lung remodeling, and immune cell activation which increase the risk for asthma or the risk of morbidity with respiratory infections. Importantly, epidemiologic studies confirm that maternal exposure to air pollutants decreases lung function in infants and children which may persist to young adulthood. Thus, environmental air pollutants contribute to childhood origins of chronic obstructive lung disease by changing the capacity for normal lung development and repair, by promoting early lung inflammation which increases the susceptibility to pollution-triggered symptomatic lung disease in adulthood, and by limiting the capacity for later adaptive/repair responses to environmental and infectious insults.
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32
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Early life exposure to allergen and ozone results in altered development in adolescent rhesus macaque lungs. Toxicol Appl Pharmacol 2014; 283:35-41. [PMID: 25545987 DOI: 10.1016/j.taap.2014.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 11/10/2014] [Accepted: 12/16/2014] [Indexed: 02/08/2023]
Abstract
In rhesus macaques, previous studies have shown that episodic exposure to allergen alone or combined with ozone inhalation during the first 6 months of life results in a condition with many of the hallmarks of asthma. This exposure regimen results in altered development of the distal airways and parenchyma (Avdalovic et al., 2012). We hypothesized that the observed alterations in the lung parenchyma would be permanent following a long-term recovery in filtered air (FA) housing. Forty-eight infant rhesus macaques (30 days old) sensitized to house dust mite (HDM) were treated with two week cycles of FA, house dust mite allergen (HDMA), ozone (O3) or HDMA/ozone (HDMA+O3) for five months. At the end of the five months, six animals from each group were necropsied. The other six animals in each group were allowed to recover in FA for 30 more months at which time they were necropsied. Design-based stereology was used to estimate volumes of lung components, number of alveoli, size of alveoli, distribution of alveolar volumes, interalveolar capillary density. After 30 months of recovery, monkeys exposed to HDMA, in either group, had significantly more alveoli than filtered air. These alveoli also had higher capillary densities as compared with FA controls. These results indicate that early life exposure to HDMA alone or HDMA+O3 alters the development process in the lung alveoli.
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Abstract
Allergic responses occur in humans, rodents, non-human primates, avian species, and all of the domestic animals. These responses are mediated by immunoglobulin E (IgE) antibodies that bind to mast cells and cause release/synthesis of potent mediators. Clinical syndromes include naturally occurring asthma in humans and cats; atopic dermatitis in humans, dogs, horses, and several other species; food allergies; and anaphylactic shock. Experimental induction of asthma in mice, rats, monkeys, sheep, and cats has helped to reveal mechanisms of pathogenesis of asthma in humans. All of these species share the ability to develop a rapid and often fatal response to systemic administration of an allergen--anaphylactic shock. Genetic predisposition to development of allergic disease (atopy) has been demonstrated in humans, dogs, and horses. Application of mouse models of IgE-mediated allergic asthma has provided evidence for a role of air pollutants (ozone, diesel exhaust, environmental tobacco smoke) in enhanced sensitization to allergens.
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Affiliation(s)
- Laurel J Gershwin
- School of Veterinary Medicine, University of California, Davis, California 95616;
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34
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Vinikoor-Imler LC, Owens EO, Nichols JL, Ross M, Brown JS, Sacks JD. Evaluating potential response-modifying factors for associations between ozone and health outcomes: a weight-of-evidence approach. ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:1166-76. [PMID: 24927060 PMCID: PMC4216162 DOI: 10.1289/ehp.1307541] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 06/11/2014] [Indexed: 05/04/2023]
Abstract
BACKGROUND Epidemiologic and experimental studies have reported a variety of health effects in response to ozone (O3) exposure, and some have indicated that certain populations may be at increased or decreased risk of O3-related health effects. OBJECTIVES We sought to identify potential response-modifying factors to determine whether specific groups of the population or life stages are at increased or decreased risk of O3-related health effects using a weight-of-evidence approach. METHODS Epidemiologic, experimental, and exposure science studies of potential factors that may modify the relationship between O3 and health effects were identified in U.S. Environmental Protection Agency's 2013 Integrated Science Assessment for Ozone and Related Photochemical Oxidants. Scientific evidence from studies that examined factors that may influence risk were integrated across disciplines to evaluate consistency, coherence, and biological plausibility of effects. The factors identified were then classified using a weight-of-evidence approach to conclude whether a specific factor modified the response of a population or life stage, resulting in an increased or decreased risk of O3-related health effects. DISCUSSION We found "adequate" evidence that populations with certain genotypes, preexisting asthma, or reduced intake of certain nutrients, as well as different life stages or outdoor workers, are at increased risk of O3-related health effects. In addition, we identified other factors (i.e., sex, socioeconomic status, and obesity) for which there was "suggestive" evidence that they may increase the risk of O3-related health effects. CONCLUSIONS Using a weight-of-evidence approach, we identified a diverse group of factors that should be considered when characterizing the overall risk of health effects associated with exposures to ambient O3.
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Affiliation(s)
- Lisa C Vinikoor-Imler
- National Center for Environmental Assessment (NCEA), U.S. Environmental Protection Agency (EPA), Research Triangle Park, North Carolina, USA
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35
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Morales E, Garcia-Esteban R, Asensio de la Cruz O, Basterrechea M, Lertxundi A, Martinez López de Dicastillo MD, Zabaleta C, Sunyer J. Intrauterine and early postnatal exposure to outdoor air pollution and lung function at preschool age. Thorax 2014; 70:64-73. [DOI: 10.1136/thoraxjnl-2014-205413] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yoder BA, Coalson JJ. Animal models of bronchopulmonary dysplasia. The preterm baboon models. Am J Physiol Lung Cell Mol Physiol 2014; 307:L970-7. [PMID: 25281639 DOI: 10.1152/ajplung.00171.2014] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Much of the progress in improved neonatal care, particularly management of underdeveloped preterm lungs, has been aided by investigations of multiple animal models, including the neonatal baboon (Papio species). In this article we highlight how the preterm baboon model at both 140 and 125 days gestation (term equivalent 185 days) has advanced our understanding and management of the immature human infant with neonatal lung disease. Not only is the 125-day baboon model extremely relevant to the condition of bronchopulmonary dysplasia but there are also critical neurodevelopmental and other end-organ pathological features associated with this model not fully discussed in this limited forum. We also describe efforts to incorporate perinatal infection into these preterm models, both fetal and neonatal, and particularly associated with Ureaplasma/Mycoplasma organisms. Efforts to rekindle the preterm primate model for future evaluations of therapies such as stem cell replacement, early lung recruitment interventions coupled with noninvasive surfactant and high-frequency nasal ventilation, and surfactant therapy coupled with antioxidant or anti-inflammatory medications, to name a few, should be undertaken.
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Affiliation(s)
- Bradley A Yoder
- Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah; and
| | - Jacqueline J Coalson
- Department of Pathology, University of Texas Health Science Center at San Antonio, San Antonio, Texas
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37
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Murphy SR, Oslund KL, Hyde DM, Miller LA, Van Winkle LS, Schelegle ES. Ozone-induced airway epithelial cell death, the neurokinin-1 receptor pathway, and the postnatal developing lung. Am J Physiol Lung Cell Mol Physiol 2014; 307:L471-81. [PMID: 25063800 DOI: 10.1152/ajplung.00324.2013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Children are uniquely susceptible to ozone because airway and lung growth continue for an extensive period after birth. Early-life exposure of the rhesus monkey to repeated ozone cycles results in region-specific disrupted airway/lung growth, but the mediators and mechanisms are poorly understood. Substance P (SP), neurokinin-1 receptor (NK-1R); and nuclear receptor Nur77 (NR4A1) are signaling pathway components involved in ozone-induced cell death. We hypothesize that acute ozone (AO) exposure during postnatal airway development disrupts SP/NK-1R/Nur77 pathway expression and that these changes correlate with increased ozone-induced cell death. Our objectives were to 1) spatially define the normal development of the SP/NK-1R/Nur77 pathway in conducting airways; 2) compare how postnatal age modulates responses to AO exposure; and 3) determine how concomitant, episodic ozone exposure modifies age-specific acute responses. Male infant rhesus monkeys were assigned at age 1 mo to two age groups, 2 or 6 mo, and then to one of three exposure subgroups: filtered air (FA), FA+AO (AO: 8 h/day × 2 days), or episodic biweekly ozone exposure cycles (EAO: 8 h/day × 5 days/14-day cycle+AO). O3 = 0.5 ppm. We found that 1) ozone increases SP/NK-1R/Nur77 pathway expression in conducting airways, 2) an ozone exposure cycle (5 days/cycle) delivered early at age 2 mo resulted in an airway that was hypersensitive to AO exposure at the end of 2 mo, and 3) continued episodic exposure (11 cycles) resulted in an airway that was hyposensitive to AO exposure at 6 mo. These observations collectively associate with greater overall inflammation and epithelial cell death, particularly in early postnatal (2 mo), distal airways.
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Affiliation(s)
- Shannon R Murphy
- Center for Health and the Environment, University of California-Davis, Davis, California
| | - Karen L Oslund
- California National Primate Research Center, University of California-Davis, Davis, California; and
| | - Dallas M Hyde
- California National Primate Research Center, University of California-Davis, Davis, California; and School of Veterinary Medicine, Department of Anatomy, Physiology and Cell Biology, University of California-Davis, Davis, California
| | - Lisa A Miller
- California National Primate Research Center, University of California-Davis, Davis, California; and School of Veterinary Medicine, Department of Anatomy, Physiology and Cell Biology, University of California-Davis, Davis, California
| | - Laura S Van Winkle
- Center for Health and the Environment, University of California-Davis, Davis, California; School of Veterinary Medicine, Department of Anatomy, Physiology and Cell Biology, University of California-Davis, Davis, California
| | - Edward S Schelegle
- California National Primate Research Center, University of California-Davis, Davis, California; and School of Veterinary Medicine, Department of Anatomy, Physiology and Cell Biology, University of California-Davis, Davis, California
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38
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Moore BD, Hyde DM, Miller LA, Wong EM, Schelegle ES. Persistence of serotonergic enhancement of airway response in a model of childhood asthma. Am J Respir Cell Mol Biol 2014; 51:77-85. [PMID: 24484440 PMCID: PMC4091858 DOI: 10.1165/rcmb.2013-0387oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 01/23/2014] [Indexed: 01/16/2023] Open
Abstract
The persistence of airway hyperresponsiveness (AHR) and serotonergic enhancement of airway smooth muscle (ASM) contraction induced by ozone (O3) plus allergen has not been evaluated. If this mechanism persists after a prolonged recovery, it would indicate that early-life exposure to O3 plus allergen induces functional changes predisposing allergic individuals to asthma-related symptoms throughout life, even in the absence of environmental insult. A persistent serotonergic mechanism in asthma exacerbations may offer a novel therapeutic target, widening treatment options for patients with asthma. The objective of this study was to determine if previously documented AHR and serotonin-enhanced ASM contraction in allergic monkeys exposed to O3 plus house dust mite allergen (HDMA) persist after prolonged recovery. Infant rhesus monkeys sensitized to HDMA were exposed to filtered air (FA) (n = 6) or HDMA plus O3 (n = 6) for 5 months. Monkeys were then housed in a FA environment for 30 months. At 3 years, airway responsiveness was assessed. Airway rings were then harvested, and ASM contraction was evaluated using electrical field stimulation with and without exogenous serotonin and serotonin-subtype receptor antagonists. Animals exposed to O3 plus HDMA exhibited persistent AHR. Serotonin exacerbated the ASM contraction in the exposure group but not in the FA group. Serotonin subtype receptors 2, 3, and 4 appear to drive the response. Our study shows that AHR and serotonin-dependent exacerbation of cholinergic-mediated ASM contraction induced by early-life exposure to O3 plus allergen persist for at least 2.5 years and may contribute to a persistent asthma phenotype.
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Affiliation(s)
- Brian D Moore
- 1 University of the Pacific, Stockton, California; and
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Damera G, Panettieri RA. Irreversible airway obstruction in asthma: what we lose, we lose early. Allergy Asthma Proc 2014; 35:111-8. [PMID: 24717787 DOI: 10.2500/aap.2013.34.3724] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Asthma, a syndrome manifested by airway inflammation and obstruction, globally contributes significantly to morbidity and mortality. Although current evidence identifies risk factors that evoke asthma, critical questions concerning susceptibility factors that induce severe persistent disease remain unclear. Early onset of asthma decreases lung function that may be unrecognized until later in adulthood when patients experience dyspnea on exertion and attenuated quality of life. This review highlights current evidence in predicting the onset of asthma and identifying those patients at greatest risk for severe persistent disease.
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Affiliation(s)
- Gautam Damera
- Translational Medicine, Respiratory, Inflammation, and Autoimmunity Group, MedImmune, LLC, Gaithersburg, Maryland, USA
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40
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Sorkness RL, Szakaly RJ, Rosenthal LA, Sullivan R, Gern JE, Lemanske RF, Sun X. Viral bronchiolitis in young rats causes small airway lesions that correlate with reduced lung function. Am J Respir Cell Mol Biol 2013; 49:808-13. [PMID: 23763491 DOI: 10.1165/rcmb.2013-0096oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Viral illness with wheezing during infancy is associated with the inception of childhood asthma. Small airway dysfunction is a component of childhood asthma, but little is known about how viral illness at an early age may affect the structure and function of small airways. We used a well-characterized rat model of postbronchiolitis chronic airway dysfunction to address how postinfectious small airway lesions affect airway physiological function and if the structure/function correlates persist into maturity. Brown Norway rats were sham- or virus inoculated at 3 to 4 weeks of age and allowed to recover from the acute illness. At 3 to 14 months of age, physiology (respiratory system resistance, Newtonian resistance, tissue damping, and static lung volumes) was assessed in anesthetized, intubated rats. Serial lung sections revealed lesions in the terminal bronchioles that reduced luminal area and interrupted further branching, affecting 26% (range, 13-39%) of the small airways at 3 months of age and 22% (range, 6-40%) at 12 to 14 months of age. At 3 months of age (n = 29 virus; n = 7 sham), small airway lesions correlated with tissue damping (rs = 0.69) but not with Newtonian resistance (rs = 0.23), and Newtonian resistance was not elevated compared with control rats, indicating that distal airways were primarily responsible for the airflow obstruction. Older rats (n = 7 virus; n = 6 sham) had persistent small airway dysfunction and significantly increased Newtonian resistance in the postbronchiolitis group. We conclude that viral airway injury at an early age may induce small airway lesions that are associated quantitatively with small airway physiological dysfunction early on and that these defects persist into maturity.
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Affiliation(s)
- Ronald L Sorkness
- 1 The School of Pharmacy; The School of Medicine and Public Health Departments of
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Gabehart K, Correll KA, Yang J, Collins ML, Loader JE, Leach S, White CW, Dakhama A. Transcriptome profiling of the newborn mouse lung response to acute ozone exposure. Toxicol Sci 2013; 138:175-90. [PMID: 24336422 DOI: 10.1093/toxsci/kft276] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ozone pollution is associated with adverse effects on respiratory health in adults and children but its effects on the neonatal lung remain unknown. This study was carried out to define the effect of acute ozone exposure on the neonatal lung and to profile the transcriptome response. Newborn mice were exposed to ozone or filtered air for 3h. Total RNA was isolated from lung tissues at 6 and 24h after exposure and was subjected to microarray gene expression analysis. Compared to filtered air-exposed littermates, ozone-exposed newborn mice developed a small but significant neutrophilic airway response associated with increased CXCL1 and CXCL5 expression in the lung. Transcriptome analysis indicated that 455 genes were down-regulated and 166 genes were up-regulated by at least 1.5-fold at 6h post-ozone exposure (t-test, p < .05). At 24h, 543 genes were down-regulated and 323 genes were up-regulated in the lungs of ozone-exposed, compared to filtered air-exposed, newborn mice (t-test, p < .05). After controlling for false discovery rate, 50 genes were identified as significantly down-regulated and only a few (RORC, GRP, VREB3, and CYP2B6) were up-regulated at 24h post-ozone exposure (q < .05). Gene ontology enrichment analysis revealed that cell cycle-associated functions including cell division/proliferation were the most impacted pathways, which were negatively regulated by ozone exposure, an adverse effect that was associated with reduced bromo-deoxyuridine incorporation. These results demonstrate that acute ozone exposure alters cell proliferation in the developing neonatal lung through a global suppression of cell cycle function.
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Murphy SR, Schelegle ES, Miller LA, Hyde DM, Van Winkle LS. Ozone exposure alters serotonin and serotonin receptor expression in the developing lung. Toxicol Sci 2013; 134:168-79. [PMID: 23570994 DOI: 10.1093/toxsci/kft090] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ozone, a pervasive environmental pollutant, adversely affects functional lung growth in children. Animal studies demonstrate that altered lung development is associated with modified signaling within the airway epithelial mesenchymal trophic unit, including mediators that can change nerve growth. We hypothesized that ozone exposure alters the normal pattern of serotonin, its transporter (5-HTT), and two key receptors (5-HT2A and 5-HT4), a pathway involved in postnatal airway neural, epithelial, and immune processes. We exposed monkeys to acute or episodic ozone during the first 2 or 6 months of life. There were three exposure groups/age: (1) filtered air, (2) acute ozone challenge, and (3) episodic ozone + acute ozone challenge. Lungs were prepared for compartment-specific qRT-PCR, immunohistochemistry, and stereology. Airway epithelial serotonin immunopositive staining increased in all exposure groups with the most prominent in 2-month midlevel and 6-month distal airways. Gene expression of 5-HTT, 5-HT2AR, and 5-HT4R increased in an age-dependent manner. Overall expression was greater in distal compared with midlevel airways. Ozone exposure disrupted both 5-HT2AR and 5-HT4R protein expression in airways and enhanced immunopositive staining for 5-HT2AR (2 months) and 5-HT4R (6 months) on smooth muscle. Ozone exposure increases serotonin in airway epithelium regardless of airway level, age, and exposure history and changes the spatial pattern of serotonin receptor protein (5-HT2A and 5-HT4) and 5-HTT gene expression depending on compartment, age, and exposure history. Understanding how serotonin modulates components of reversible airway obstruction exacerbated by ozone exposure sets the foundation for developing clinically relevant therapies for airway disease.
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Affiliation(s)
- Shannon R Murphy
- Center for Health and the Environment, California National Primate Research Center, Davis, CA, USA
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Allen JL, Conrad K, Oberdörster G, Johnston CJ, Sleezer B, Cory-Slechta DA. Developmental exposure to concentrated ambient particles and preference for immediate reward in mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:32-8. [PMID: 23063827 PMCID: PMC3553438 DOI: 10.1289/ehp.1205505] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 10/11/2012] [Indexed: 05/07/2023]
Abstract
BACKGROUND Recent epidemiological studies indicate negative associations between a diverse group of air pollutants and cognitive functioning in children and adults, and aspects of attention deficit in children. Neuroinflammation and oxidative stress are two putative biological mechanisms by which air pollutants may adversely affect the brain. OBJECTIVES We sought to determine whether exposure to concentrated ambient particulate matter (CAPS) during the first 2 weeks of life, alone or again in adulthood, could alter responding for delayed reward, a critical component of human decision making. Greater preference for immediate reward has been implicated as a component of several psychiatric disorders, addiction, obesity, and attention deficit. METHODS C57BL/6J mice were exposed to ultrafine particles (< 100 nm in aerodynamic diameter; CAPS) using the Harvard University Concentrated Ambient Particle System (HUCAPS) or filtered air in the postnatal period (days 4-7 and 10-13) with and without adult exposure over days 56-60. In adulthood, delay behavior was assessed using a fixed-ratio waiting-for-reward (FR wait) paradigm in which 25 responses (FR25) were required to initiate the waiting-for-reward component during which mice obtained "free" sucrose pellets with the stipulation that these "free" pellets were delivered at increasing delay intervals. RESULTS Coupled with increased FR response rates, mice exposed to postnatal CAPS displayed increased FR resets that reinstated short delays, indicating a preference for shorter delays, despite the added response cost of the FR25. No associated changes in locomotor activity were observed. CONCLUSIONS Postnatal CAPS exposure produces an enhanced bias towards immediate rewards, a risk factor for several central nervous system (CNS) disorders. This enhancement does not appear to be the result of hyperactivity. The findings underscore the need for further evaluation of air pollution effects on the CNS and its potential contribution to CNS diseases and disorders.
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Affiliation(s)
- Joshua L Allen
- Department of Environmental Medicine, University of Rochester School of Medicine, Rochester, New York 14642, USA
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Murphy SR, Schelegle ES, Edwards PC, Miller LA, Hyde DM, Van Winkle LS. Postnatal exposure history and airways: oxidant stress responses in airway explants. Am J Respir Cell Mol Biol 2012; 47:815-23. [PMID: 22962062 DOI: 10.1165/rcmb.2012-0110oc] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Postnatally, the lung continues to grow and differentiate while interacting with the environment. Exposure to ozone (O(3)) and allergens during postnatal lung development alters structural elements of conducting airways, including innervation and neurokinin abundance. These changes have been linked with development of asthma in a rhesus monkey model. We hypothesized that O(3) exposure resets the ability of the airways to respond to oxidant stress and that this is mediated by changes in the neurokinin-1 receptor (NK-1R). Infant rhesus monkeys received episodic exposure to O(3) biweekly with or without house dust mite antigen (HDMA) from 6 to 12 months of age. Age-matched monkeys were exposed to filtered air (FA). Microdissected airway explants from midlevel airways (intrapulmonary generations 5-8) for four to six animals in each of four groups (FA, O(3), HDMA, and HDMA+O(3)) were tested for NK-1R gene responses to acute oxidant stress using exposure to hydrogen peroxide (1.2 mM), a lipid ozonide (10 μM), or sham treatment for 4 hours in vitro. Airway responses were measured using real-time quantitative RT-PCR of NK-1R and IL-8 gene expression. Basal NK-1R gene expression levels were not different between the exposure groups. Treatment with ozonide or hydrogen peroxide did not change NK-1R gene expression in animals exposed to FA, HDMA, or HDMA+O(3). However, treatment in vitro with lipid ozonide significantly increased NK-1R gene expression in explants from O(3)-exposed animals. We conclude that a history of prior O(3) exposure resets the steady state of the airways to increase the NK-1R response to subsequent acute oxidant stresses.
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Affiliation(s)
- Shannon R Murphy
- Center for Health and the Environment, University of California Davis, Davis, CA 95616-8732, USA
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Plopper CG, Joad JP, Miller LA, Schelegle ES, Fanucchi MV, Van Winkle LS, Tyler NK, Avdalovic MV, Evans MJ, Lasley WL, Buckpitt AR, Pinkerton KE, Tarkington BK, Davis S, Nishio SJ, Gershwin LJ, Wu R, Hyde DM. Lung effects of inhaled corticosteroids in a rhesus monkey model of childhood asthma. Clin Exp Allergy 2012; 42:1104-18. [PMID: 22702509 PMCID: PMC3913647 DOI: 10.1111/j.1365-2222.2012.04005.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND The risks for infants and young children receiving inhaled corticosteroid (ICS) therapy are largely unknown. Recent clinical studies indicate that ICS therapy in pre-school children with symptoms of asthma result in decreased symptoms without influencing the clinical disease course, but potentially affect postnatal growth and development. The current study employs a primate experimental model to identify the risks posed by ICS therapy. OBJECTIVE To (1) establish whether ICS therapy in developing primate lungs reverses pulmonary pathobiology associated with allergic airway disease (AAD) and (2) define the impact of ICS on postnatal lung growth and development in primates. METHODS Infant rhesus monkeys were exposed, from 1 through 6 months, to filtered air (FA) with house dust mite allergen and ozone using a protocol that produces AAD (AAD monkeys), or to FA alone (Control monkeys). From three through 6 months, the monkeys were treated daily with ICS (budesonide) or saline. RESULTS Several AAD manifestations (airflow restrictions, lavage eosinophilia, basement membrane zone thickening, epithelial mucin composition) were reduced with ICS treatment, without adverse effects on body growth or adrenal function; however, airway branching abnormalities and intraepithelial innervation were not reduced. In addition, several indicators of postnatal lung growth and differentiation: vital capacity, inspiratory capacity, compliance, non-parenchymal lung volume and alveolarization, were increased in both AAD and Control monkeys that received ICS treatment. CONCLUSIONS AND CLINICAL RELEVANCE Incomplete prevention of pathobiological changes in the airways and disruption of postnatal growth and differentiation of airways and lung parenchyma in response to ICS pose risks for developing primate lungs. These responses also represent two mechanisms that could compromise ICS therapy's ability to alter clinical disease course in young children.
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Affiliation(s)
- C G Plopper
- Respiratory Diseases Unit, California National Primate Research Center, University of California, One Shields Ave, Davis, CA 95616, USA.
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Moore BD, Hyde D, Miller L, Wong E, Frelinger J, Schelegle ES. Allergen and ozone exacerbate serotonin-induced increases in airway smooth muscle contraction in a model of childhood asthma. Respiration 2012; 83:529-42. [PMID: 22507883 DOI: 10.1159/000336835] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Accepted: 01/17/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Serotonin (5-HT) modulates cholinergic neurotransmission and exacerbates airway smooth muscle (ASM) contraction in normal animal and nonasthmatic human tissue. Exposure to house dust mite allergen (HDMA) and ozone (O(3)) leads to airway hyperreactivity and 5-HT-positive cells in the airway epithelium of infant rhesus monkeys. Research shows that concomitant exposure in allergic animals has an additive effect on airway hyperreactivity. OBJECTIVES In this study, the hypothesis is that the exposure of allergic infant rhesus monkeys to HDMA, O(3) and in combination, acting through 5-HT receptors, enhances 5-HT modulation of postganglionic cholinergic ASM contraction. METHODS Twenty-four HDMA-sensitized infant monkeys were split into 4 groups at the age of 1 month, and were exposed to filtered air (FA), HDMA, O(3) or in combination (HDMA+O(3)). At the age of 6 months, airway rings were harvested and postganglionic, and parasympathetic-mediated ASM contraction was evaluated using electrical-field stimulation (EFS). RESULTS 5-HT exacerbated the EFS response within all exposure groups, but had no effect in the FA group. 5-HT(2), 5-HT(3) and 5-HT(4) receptor agonists exacerbated the response. 5-HT concentration-response curves performed after incubation with specific receptor antagonists confirmed the involvement of 5-HT(2), 5-HT(3) and 5-HT(4) receptors. Conversely, a 5-HT(1) receptor agonist attenuated the tension across all groups during EFS, and in ASM contracted via exogenous acetylcholine. CONCLUSIONS HDMA, O(3) and HDMA+O(3) exposure in a model of childhood allergic asthma enhances 5-HT exacerbation of EFS-induced ASM contraction through 5-HT(2), 5-HT(3) and 5-HT(4) receptors. A nonneurogenic inhibitory pathway exists, unaffected by exposure, mediated by 5-HT(1) receptors located on ASM.
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Affiliation(s)
- Brian D Moore
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, and Respiratory Diseases Unit, California National Primate Research Center, University of California - Davis, Davis, CA 95616-8732, USA.
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Schwartz J, Bellinger D, Glass T. Exploring potential sources of differential vulnerability and susceptibility in risk from environmental hazards to expand the scope of risk assessment. Am J Public Health 2011; 101 Suppl 1:S94-101. [PMID: 22021315 DOI: 10.2105/ajph.2011.300272] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Genetic factors, other exposures, individual disease states and allostatic load, psychosocial stress, and socioeconomic position all have the potential to modify the response to environmental exposures. Moreover, many of these modifiers covary with the exposure, leading to much higher risks in some subgroups. These are not theoretical concerns; rather, all these patterns have already been demonstrated in studies of the effects of lead and air pollution. However, recent regulatory impact assessments for these exposures have generally not incorporated these findings. Therefore, differential risk and vulnerability is a critically important but neglected area within risk assessment, and should be incorporated in the future.
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Affiliation(s)
- Joel Schwartz
- Department of Environmental Health and Epidemiology, Harvard School of Public Health, and Harvard Center for Risk Analysis, Harvard University, Boston, MA 02215, USA.
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Lee D, Wallis C, Van Winkle LS, Wexler AS. Disruption of tracheobronchial airway growth following postnatal exposure to ozone and ultrafine particles. Inhal Toxicol 2011; 23:520-31. [PMID: 21780864 DOI: 10.3109/08958378.2011.591447] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study examined airway structure changes in adult rats after a long recovery period due to sub-chronic juvenile exposure to ozone and ultrafine particles that have a high organic fraction. Neonatal male Sprague-Dawley rats were exposed during lung development to 3 cycles of 0.5 ppm ozone from postnatal day 7 through 25. Two different exposure patterns were used: 5-day exposure per week (Ozone52) or 2-day exposure per week (Ozone25) with or without co-exposure to ultrafine particles (OPFP5252, OPFP5225). Airway architecture was evaluated at 81 days of age, after 56 days of continued development beyond the exposure period in filtered air (FA). By analyzing CT images from lung airway casts, we determined airway diameter, length, branching angle, and rotation angle for most conducting airways. Compared with the FA control group, the Ozone52 group showed significant decreases in airway diameter in generations larger than 10 especially in the right diaphragmatic lobe and in airway length in distal generations, while changes in airway structure due to the Ozone25 exposure were not appreciable. Interaction effects of ozone and ultrafine particle exposures were not significant. These results suggest that airway alterations due to postnatal ozone exposure are not limited to the distal region but occur extensively from the middle to distal conducting airways. Further, alterations due to early ozone exposure do not recover nearly 2 months after exposure has ceased demonstrating a persistent airway structural change following an early life exposure to ozone.
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Affiliation(s)
- Dongyoub Lee
- Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA
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Lee D, Srirama PK, Wallis C, Wexler AS. Postnatal growth of tracheobronchial airways of Sprague-Dawley rats. J Anat 2011; 218:717-25. [PMID: 21534951 DOI: 10.1111/j.1469-7580.2011.01372.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Rats are widely used for the studies of pulmonary toxicology in both juveniles and adults. To facilitate such studies, investigators have developed models of lung architecture based on manual or computerized airway measurements. However, postnatal growth of conducting airways of rat lungs has never been reported. In this paper, we present conducting airway architecture statistics for male Sprague-Dawley rat lungs at ages 15, 28, 40, and 81 days by analyzing CT images from airway silicon casts. Detailed branching characteristics and intersubject variance are presented. This study shows that (i) airway growth in diameter and length is not linear with age, (ii) growth of airway length is faster than that of diameter during the 15-81-day postnatal period, and (iii) asymmetry in airway diameter (ratio of major to minor daughter diameter) increases with age.
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Affiliation(s)
- DongYoub Lee
- Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA.
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Lee D, Willits N, Wexler AS. Detecting alterations in pulmonary airway development with airway-by-airway comparison. Ann Biomed Eng 2011; 39:1805-14. [PMID: 21347548 PMCID: PMC3096773 DOI: 10.1007/s10439-011-0279-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 02/12/2011] [Indexed: 11/26/2022]
Abstract
Neonatal and postnatal exposures to air pollutants have adverse effects on lung development resulting in airway structure changes. Usually, generation-averaged analysis of airway geometric parameters is employed to differentiate between pulmonary airway trees. However, this method is limited, especially for monopodial branching trees such as in rat airways, because both quite proximal and less proximal airways that have very different structure and function may be in the same generation. To avoid limitations inherent in generation averaging, we developed a method that compares two trees airway-by-airway using micro CT image data from rat lungs. This computerized technique (1) identifies the geometry and architecture of the conducting airways from CT images, (2) extracts the main tree, (3) associates paired airways from the two different trees, and (4) develops summary statistics on the degree of similarity between populations of animals. By comparing the trees airway-by-airway, we found that the variance in airway length of the group exposed to diffusion flame particles (DFP) is significantly larger than the group raised in filtered air (FA). This method also found that rotation angle of the DFP group is significantly larger than FA, which is not as certain in the generation-based analysis. We suggest that airway-by-airway analysis complements generation-based averaging for detecting airway alterations.
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Affiliation(s)
- DongYoub Lee
- Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616, USA.
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