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Krajnak K, Kan H, Thompson JA, McKinney W, Waugh S, South T, Burns D, Lebouf R, Cumpston J, Boots T, Fedan JS. Biological effects of diesel exhaust inhalation. III cardiovascular function. Inhal Toxicol 2024; 36:189-204. [PMID: 38466202 PMCID: PMC11099779 DOI: 10.1080/08958378.2024.2327364] [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: 11/17/2023] [Accepted: 02/29/2024] [Indexed: 03/12/2024]
Abstract
OBJECTIVE Inhalation of diesel exhaust (DE) has been shown to be an occupational hazard in the transportation, mining, and gas and oil industries. DE also contributes to air pollution, and therefore, is a health hazard to the general public. Because of its effects on human health, changes have been made to diesel engines to reduce both the amounts of particulate matter and volatile fumes they generate. The goal of the current study was to examine the effects of inhalation of diesel exhaust. MATERIALS AND METHODS The study presented here specifically examines the effects of exposure to 0.2 and 1.0 mg/m3 DE or filtered air (6h/d for 4 d) on measures of peripheral and cardio-vascular function, and biomarkers of heart and kidney dysfunction in male rats. A Tier 2 engine used in oil and gas fracking operations was used to generate the diesel exhaust. RESULTS Exposure to 0.2 mg/m3 DE resulted in an increase in blood pressure 1d following the last exposure, and increases in dobutamine-induced cardiac output and stroke volume 1 and 27d after exposure. Changes in peripheral vascular responses to norepinephrine and acetylcholine were minimal as were changes in transcript expression in the heart and kidney. Exposure to 1.0 mg/m3 DE did not result in major changes in blood pressure, measures of cardiac function, peripheral vascular function or transcript expression. DISCUSSION AND CONCLUSIONS Based on the results of this study, we suggest that exposure to DE generated by a Tier 2 compliant diesel engine generates acute effects on biomarkers indicative of cardiovascular dysfunction. Recovery occurs quickly with most measures of vascular/cardiovascular function returning to baseline levels by 7d following exposure.
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Affiliation(s)
- Kristine Krajnak
- Physical Effects Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Hong Kan
- Pathology and Physiology Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Janet A. Thompson
- Pathology and Physiology Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Walter McKinney
- Physical Effects Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Stacey Waugh
- Physical Effects Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Tim South
- Physical Effects Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Dru Burns
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Ryan Lebouf
- Respiratory Health Division, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Jared Cumpston
- Animal Facilities, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Theresa Boots
- Risk Evaluation Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
| | - Jeffrey S. Fedan
- Pathology and Physiology Research Branch, National Institute for Occupational Safety and Health, Morgantown, WV, USA
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2
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de Jersey AM, Lavers JL, Zosky GR, Rivers-Auty J. The understudied global experiment of pollution's impacts on wildlife and human health: The ethical imperative for interdisciplinary research. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 336:122459. [PMID: 37633432 DOI: 10.1016/j.envpol.2023.122459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/02/2023] [Accepted: 08/23/2023] [Indexed: 08/28/2023]
Abstract
The global impact of pollution on human and wildlife health is a growing concern. The health impacts of pollution are significant and far-reaching yet poorly understood as no one field of research has the practices and methodologies required to encapsulate the diversity of these consequences. This paper advocates that interdisciplinary research is essential to comprehend the full extent of the impact of pollution. Medical and ecological research play a key role in investigating the health consequences of the pollution crisis, yet the wildlife experience is often neglected. This paper outlines how applying advanced techniques and expertise adapted in medical research to wildlife exposed to pollutants offers a unique perspective to understanding the full diversity of impacts to health. The challenges that impede the progress of this research include the lack of support for interdisciplinary research among funding streams, limitations in field-specific techniques, and a lack of communication between researchers from different disciplines. Of awarded funding from major national research councils across Australia, Europe, and the United States of America, only 0.5% is dedicated to pollution focused research. This is inclusive of laboratory equipment, mitigation strategies, quantification of environmental samples and health consequences research. Of that, 0.03% of funding is awarded to explaining the wildlife experience and documenting the health consequences observed despite being model organisms to environmentally and biologically relevant models for pollution exposure. This calls for a coordinated effort to overcome these hurdles and to promote interdisciplinary research in order to fully comprehend the consequences of pollution exposure and protect the health of humans, wildlife, and the environment. An interdisciplinary approach to this problem is timely given the magnitude of negative health consequences associated with exposure, the number of pollutants already present within the environment and the continual development of new compounds.
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Affiliation(s)
- Alix M de Jersey
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, 7000, Australia
| | - Jennifer L Lavers
- Bird Group, The Natural History Museum, Akeman Street, Tring, Hertfordshire, HP23 6AP, United Kingdom; Esperance Tjaltjraak Native Title Aboriginal Corporation, 11A Shelden Road, Esperance, Western Australia, 6450, Australia.
| | - Graeme R Zosky
- Menzies Institute for Medical Research, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, 7000, Australia
| | - Jack Rivers-Auty
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, 7000, Australia
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3
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Klimkaite L, Liveikis T, Kaspute G, Armalyte J, Aldonyte R. Air pollution-associated shifts in the human airway microbiome and exposure-associated molecular events. Future Microbiol 2023; 18:607-623. [PMID: 37477532 DOI: 10.2217/fmb-2022-0258] [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] [Indexed: 07/22/2023] Open
Abstract
Publications addressing air pollution-induced human respiratory microbiome shifts are reviewed in this article. The healthy respiratory microbiota is characterized by a low density of bacteria, fungi and viruses with high diversity, and usually consists of Bacteroidetes, Firmicutes, Proteobacteria, Actinobacteria, Fusobacteria, viruses and fungi. The air's microbiome is highly dependent on air pollution levels and is directly reflected within the human respiratory microbiome. In addition, pollutants indirectly modify the local environment in human respiratory organs by reducing antioxidant capacity, misbalancing proteolysis and modulating inflammation, all of which regulate local microbiomes. Improving air quality leads to more diverse and healthy microbiomes of the local air and, subsequently, residents' airways.
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Affiliation(s)
| | | | - Greta Kaspute
- State Research Institute Center for Innovative Medicine, Vilnius, Lithuania
| | | | - Ruta Aldonyte
- State Research Institute Center for Innovative Medicine, Vilnius, Lithuania
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4
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Kaur K, Mohammadpour R, Ghandehari H, Reilly CA, Paine R, Kelly KE. Effect of combustion particle morphology on biological responses in a Co-culture of human lung and macrophage cells. ATMOSPHERIC ENVIRONMENT (OXFORD, ENGLAND : 1994) 2022; 284:119194. [PMID: 35937043 PMCID: PMC9348743 DOI: 10.1016/j.atmosenv.2022.119194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Atmospheric aging of combustion particles alters their chemical composition and morphology. Previous studies have reported differences in toxicological responses after exposure to fresh versus aged particles, with chemical composition being the prime suspect behind the differences. However, less is known about the contribution of morphological differences in atmospherically aged particles to toxicological responses, possibly due to the difficulty in resolving the two properties (composition and morphology) that change simultaneously. This study altered the shape of lab-generated combustion particles, without affecting the chemical composition, from fractal-like to a more compact spherical shape, using a water condensation-evaporation method. The two shapes were exposed to a co-culture of human airway epithelial (A549) and differentiated human monocyte (THP-1) cells at air-liquid interface (ALI) conditions. The particles with different shapes were deposited using an electrostatic field-based ALI chamber. For the same mass dose, both shapes were internalized by cells, induced a pro-inflammatory response (IL-8 and TNFα), and enhanced CYP1A1 gene expression compared to air controls. The more compact spherical particles (representative of atmospherically aged particles) induced more early apoptosis and release of TNFα compared to the more fractal-like particles. These results suggest a contribution of morphology to the increased toxicity of aged combustion-derived particles.
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Affiliation(s)
- Kamaljeet Kaur
- Department of Chemical Engineering, University of Utah, United States
| | - Raziye Mohammadpour
- Utah Center for Nanomedicine, University of Utah, United States
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, United States
- mRNA Center of Excellence, Sanofi, Waltham, MA, USA
| | - Hamidreza Ghandehari
- Utah Center for Nanomedicine, University of Utah, United States
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, United States
- Department of Biomedical Engineering, University of Utah, United States
| | - Christopher A. Reilly
- Utah Center for Nanomedicine, University of Utah, United States
- Department of Pharmacology and Toxicology, Center for Human Toxicology, University of Utah, United States
| | - Robert Paine
- Division of Pulmonary and Critical Care Medicine, University of Utah, United States
| | - Kerry E. Kelly
- Department of Chemical Engineering, University of Utah, United States
- Utah Center for Nanomedicine, University of Utah, United States
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5
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Jiang Q, Xu X, Ni H, Guo Y, Yuan J, Zheng Y. In Ovo Early-in-Life Inhalation Exposure to Gas/Aerosol with a Chicken Embryo Model. Methods Mol Biol 2021; 2326:197-201. [PMID: 34097269 DOI: 10.1007/978-1-0716-1514-0_13] [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] [Indexed: 06/12/2023]
Abstract
To assess the toxicities of gas/aerosol, inhalation exposure model is necessary. Especially important is the inhalation exposure early in life. Traditional inhalation exposure method requires specific instruments and may have to imitate the exposure either days before or after birth. Here, a new inhalation exposure method is introduced, which may be performed without any specific instruments and effectively expose late stage chicken embryos to gas/aerosol very early-in-life by inhalation. This method may facilitate the risk assessment and mechanistic studies regarding the early-in-life effects of gas/aerosol exposure.
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Affiliation(s)
- Qixiao Jiang
- School of Public Health, Qingdao University, Qingdao, Shandong, China
| | - Xiaohui Xu
- School of Public Health, Qingdao University, Qingdao, Shandong, China
| | - Hao Ni
- School of Public Health, Qingdao University, Qingdao, Shandong, China
| | - Yajie Guo
- School of Public Health, Qingdao University, Qingdao, Shandong, China
| | - Junhua Yuan
- School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Yuxin Zheng
- School of Public Health, Qingdao University, Qingdao, Shandong, China.
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6
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Martin BL, Thompson LC, Kim YH, King C, Snow S, Schladweiler M, Haykal-Coates N, George I, Gilmour MI, Kodavanti UP, Hazari MS, Farraj AK. Peat smoke inhalation alters blood pressure, baroreflex sensitivity, and cardiac arrhythmia risk in rats. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2020; 83:748-763. [PMID: 33016233 PMCID: PMC7682804 DOI: 10.1080/15287394.2020.1826375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Wildland fires (WF) are linked to adverse health impacts related to poor air quality. The cardiovascular impacts of emissions from specific biomass sources are however unknown. The purpose of this study was to assess the cardiovascular impacts of a single exposure to peat smoke, a key regional WF air pollution source, and relate these to baroreceptor sensitivity and inflammation. Three-month-old male Wistar-Kyoto rats, implanted with radiotelemeters for continuous monitoring of heart rate (HR), blood pressure (BP), and spontaneous baroreflex sensitivity (BRS), were exposed once, for 1-hr, to filtered air or low (0.38 mg/m3 PM) or high (4.04 mg/m3) concentrations of peat smoke. Systemic markers of inflammation and sensitivity to aconitine-induced cardiac arrhythmias, a measure of latent myocardial vulnerability, were assessed in separate cohorts of rats 24 hr after exposure. PM size (low peat = 0.4-0.5 microns vs. high peat = 0.8-1.2 microns) and proportion of organic carbon (low peat = 77% vs. high peat = 65%) varied with exposure level. Exposure to high peat and to a lesser extent low peat increased systolic and diastolic BP relative to filtered air. In contrast, only exposure to low peat elevated BRS and aconitine-induced arrhythmogenesis relative to filtered air and increased circulating levels of low-density lipoprotein cholesterol, complement components C3 and C4, angiotensin-converting enzyme (ACE), and white blood cells. Taken together, exposure to peat smoke produced overt and latent cardiovascular consequences that were likely influenced by physicochemical characteristics of the smoke and associated adaptive homeostatic mechanisms.
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Affiliation(s)
| | | | - Yong Ho Kim
- Center for Environmental Medicine, Asthma and Lung Biology, School of Medicine, University of North Carolina, Chapel Hill, NC
| | - Charly King
- Public Health and Integrated Toxicology Division, US EPA, RTP, NC
| | - Samantha Snow
- Public Health and Integrated Toxicology Division, US EPA, RTP, NC
- ICF International, Durham, NC
| | | | | | - Ingrid George
- Air Methods & Characterization Division, US EPA, RTP, NC
| | - M. Ian Gilmour
- Public Health and Integrated Toxicology Division, US EPA, RTP, NC
| | | | - Mehdi S. Hazari
- Public Health and Integrated Toxicology Division, US EPA, RTP, NC
| | - Aimen K. Farraj
- Public Health and Integrated Toxicology Division, US EPA, RTP, NC
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Jiang Q, Xu X, Zhang C, Luo J, Lv N, Shi L, Ji A, Gao M, Chen F, Cui L, Zheng Y. In ovo very early-in-life exposure to diesel exhaust induced cardiopulmonary toxicity in a hatchling chick model. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114718. [PMID: 32388309 DOI: 10.1016/j.envpol.2020.114718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
Diesel exhaust (DE) had been associated with cardiopulmonary toxicity and developmental toxicity. However, neonatal very early-in-life exposure had not been extensively studied previously. To investigate the potential effects of neonatal very early-in-life exposure to DE, a brand-new chicken embryo in ovo exposure model had been established, with which the cardiopulmonary effects of DE exposure via air cell infusion at embryonic day 18/19 (ED18/19) were assessed in hatchling chicks post-hatch 0-, 1-, or 2-weeks. Heart rates were assessed with electrocardiography. Cardiac and pulmonary morphologies were investigated with histopathological methods. Cardiopulmonary effects were explored with immunohistochemistry for alpha smooth muscle actin (alpha-SMA). In further investigations, the expression levels of phosphorylated AhR, serum levels of TGF-β1, phosphorylated SMAD2/3 and phosphorylated p38MAPK were assessed in the lung tissues. Significantly elevated heart rates, increased right ventricular wall thickness and cardiac collagen deposition were observed in the hearts of exposed hatchling chicks. Significantly increased collagen deposition as well as increased vascular alpha-SMA layer thickness/decreased cavity area were observed in exposed animal lungs. These effects persisted up to two weeks post-hatch. Mechanistic studies revealed elevated phosphorylated AhR expression levels in 0-week and 1-week chicken lungs, while phosphorylated SMAD2/3 levels significantly increased in 0-week chicken lungs but decreased in 2-week chicken lungs following DE exposure. Phosphorylation of p38MAPK did not remarkably increase until 2-week post-hatch. In summary, the novel chicken neonatal very early-in-life exposure model effectively exposed the chicken embryos during the neonatal initial breathing, resulting in cardiopulmonary toxicity, which is associated with AHR, TGF-β1 and MAPK signaling.
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Affiliation(s)
- Qixiao Jiang
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Xiaohui Xu
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Chao Zhang
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Jing Luo
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Na Lv
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, 266021, China
| | - Limei Shi
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Andong Ji
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Mengyu Gao
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Feilong Chen
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Lianhua Cui
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Yuxin Zheng
- Department of Toxicology, School of Public Health, Qingdao University, Qingdao, 266021, China.
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8
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Gangwar RS, Bevan GH, Palanivel R, Das L, Rajagopalan S. Oxidative stress pathways of air pollution mediated toxicity: Recent insights. Redox Biol 2020; 34:101545. [PMID: 32505541 PMCID: PMC7327965 DOI: 10.1016/j.redox.2020.101545] [Citation(s) in RCA: 133] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/01/2020] [Accepted: 04/16/2020] [Indexed: 02/08/2023] Open
Abstract
Ambient air pollution is a leading environmental cause of morbidity and mortality globally with most of the outcomes of cardiovascular origin. While numerous mechanisms are proposed to explain the link between air pollutants and cardiovascular events, the evidence supports a role for oxidative stress as a critical intermediary pathway in the transduction of systemic responses in the cardiovascular system. Indeed, alterations in vascular function are a critical step in the development of cardiometabolic disorders such as hypertension, diabetes, and atherosclerosis. This review will provide an overview of the impact of particulate and gaseous pollutants on oxidative stress from human and animal studies published in the last five years. We discuss current gaps in knowledge and evidence to date implicating the role of oxidative stress with an emphasis on inhalational exposures. We conclude with the identification of gaps, and an exhortation for further studies to elucidate the impact of oxidative stress in air pollution mediated effects. Particulate matter air pollution is the leading risk factor for cardiovascular morbidity and mortality globally. Mechanisms of oxidative stress mediated pathways. How does lung inflammation crucial to inhalational exposure mediate systemic toxicity? Review of recent animal and human exposure studies providing insights into oxidative stress pathways.
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Affiliation(s)
- Roopesh Singh Gangwar
- Cardiovascular Research Institute, University Hospitals, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Graham H Bevan
- Cardiovascular Research Institute, University Hospitals, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Rengasamy Palanivel
- Cardiovascular Research Institute, University Hospitals, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Lopa Das
- Cardiovascular Research Institute, University Hospitals, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sanjay Rajagopalan
- Cardiovascular Research Institute, University Hospitals, Case Western Reserve University, Cleveland, OH, 44106, USA.
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