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Song Z, Lynch K, Parker-Allotey NA, Bennett EE, Xu X, Whitsel EA, Smith R, Stewart JD, Park ES, Ying Q, Power MC. Association of midlife air pollution exposures and residential road proximity with incident dementia: The Atherosclerosis Risk in Communities (ARIC) study. ENVIRONMENTAL RESEARCH 2024; 258:119425. [PMID: 38879108 DOI: 10.1016/j.envres.2024.119425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/23/2024]
Abstract
BACKGROUND Increasing evidence links higher air pollution exposures to increased risk of cognitive impairment. While midlife risk factors are often most strongly linked to dementia risk, few studies have considered associations between midlife roadway proximity or ambient air pollution exposure and incident dementia decades later, in late life. OBJECTIVES Our objective was to determine if midlife exposures to ambient air pollution or roadway proximity are associated with increased risk of dementia in the Atherosclerosis Risk in Communities (ARIC) study over up to 29 years of follow-up. METHODS Our eligible sample included Black and White ARIC participants without dementia at Visit 2 (1990-1992). Participants were followed through Visit 7 (2018-2019), with dementia status and onset date defined based on formal dementia ascertainment at study visits, informant interviews, and surveillance efforts. We used adjusted Weibull survival models to assess the associations of midlife ambient air pollution and road proximity with incident dementia. RESULTS The median age at baseline (1990-1992, Visit 2) of the 12,700 eligible ARIC participants was 57.0 years; 56.0% were female, 24.2% were Black, and 78.9% had at least a high school education. Over up to 29 years of follow-up, 2511 (19.8%) persons developed dementia. No associations were found between ambient air pollutants and proximity to major roadways with risk of incident dementia. In exploratory analyses, living closer to roadways in midlife increased dementia risk in individuals younger at baseline and those without midlife hypertension, and there was evidence of increased risk of dementia with increased midlife exposure to NOx, several PM2.5 components, and trace metals among those with diabetes in midlife. CONCLUSIONS Midlife exposure to ambient air pollution and midlife roadway proximity was not associated with dementia risk over decades of follow-up. Further investigation to explore potential for greater susceptibility among specific subgroups identified here is needed.
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Affiliation(s)
- Ziwei Song
- Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
| | - Katie Lynch
- Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
| | - Naa Adoley Parker-Allotey
- Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
| | - Erin E Bennett
- Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States
| | - Xiaohui Xu
- School of Public Health, Texas A&M Health Science Center, College Station, TX, United States
| | - Eric A Whitsel
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States; Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC, United States
| | - Richard Smith
- Department of Statistics and Operations Research, College of Arts and Sciences, University of North Carolina, Chapel Hill, NC, United States; Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States
| | - James D Stewart
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States
| | - Eun Sug Park
- Texas A&M Transportation Institute, Texas A&M University System, College Station, TX, United States
| | - Qi Ying
- Zachry Department of Civil Engineering, Texas A&M University, College Station, TX, 77843, United States
| | - Melinda C Power
- Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, United States.
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2
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Gunawan C, Fleming C, Irga PJ, Jien Wong R, Amal R, Torpy FR, Mojtaba Golzan S, McGrath KC. Neurodegenerative effects of air pollutant Particles: Biological mechanisms implicated for Early-Onset Alzheimer's disease. ENVIRONMENT INTERNATIONAL 2024; 185:108512. [PMID: 38412566 DOI: 10.1016/j.envint.2024.108512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Sporadic Alzheimer's disease (AD) occurs in 99% of all cases and can be influenced by air pollution such as diesel emissions and more recently, an iron oxide particle, magnetite, detected in the brains of AD patients. However, a mechanistic link between air pollutants and AD development remains elusive. AIM To study the development of AD-relevant pathological effects induced by air pollutant particle exposures and their mechanistic links, in wild-type and AD-predisposed models. METHODS C57BL/6 (n = 37) and APP/PS1 transgenic (n = 38) mice (age 13 weeks) were exposed to model pollutant iron-based particle (Fe0-Fe3O4, dTEM = 493 ± 133 nm), hydrocarbon-based diesel combustion particle (43 ± 9 nm) and magnetite (Fe3O4, 153 ± 43 nm) particles (66 µg/20 µL/third day) for 4 months, and were assessed for behavioural changes, neuronal cell loss, amyloid-beta (Aβ) plaque, immune response and oxidative stress-biomarkers. Neuroblastoma SHSY5Y (differentiated) cells were exposed to the particles (100 μg/ml) for 24 h, with assessments on immune response biomarkers and reactive oxygen species generation. RESULTS Pollutant particle-exposure led to increased anxiety and stress levels in wild-type mice and short-term memory impairment in AD-prone mice. Neuronal cell loss was shown in the hippocampal and somatosensory cortex, with increased detection of Aβ plaque, the latter only in the AD-predisposed mice, with the wild-type not genetically disposed to form the plaque. The particle exposures however, increased AD-relevant immune system responses, including inflammation, in both strains of mice. Exposures also stimulated oxidative stress, although only observed in wild-type mice. The in vitro studies complemented the immune response and oxidative stress observations. CONCLUSIONS This study provides insights into the mechanistic links between inflammation and oxidative stress to pollutant particle-induced AD pathologies, with magnetite apparently inducing the most pathological effects. No exacerbation of the effects was observed in the AD-predisposed model when compared to the wild-type, indicating a particle-induced neurodegeneration that is independent of disease state.
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Affiliation(s)
- Cindy Gunawan
- Australian Institute for Microbiology and Infection, University of Technology Sydney, Sydney, Australia.
| | - Charlotte Fleming
- School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Peter J Irga
- School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - Roong Jien Wong
- School of Chemical Engineering, University of New South Wales, Australia; Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research (A*STAR), Singapore
| | - Rose Amal
- School of Chemical Engineering, University of New South Wales, Australia
| | - Fraser R Torpy
- School of Life Sciences, University of Technology Sydney, Sydney, Australia
| | - S Mojtaba Golzan
- Vision Science Group, Graduate School of Health, University of Technology Sydney, Sydney, Australia
| | - Kristine C McGrath
- School of Life Sciences, University of Technology Sydney, Sydney, Australia.
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Faherty T, Badri H, Hu D, Voliotis A, Pope FD, Mudway I, Smith J, McFiggans G. HIPTox-Hazard Identification Platform to Assess the Health Impacts from Indoor and Outdoor Air Pollutant Exposures, through Mechanistic Toxicology: A Single-Centre Double-Blind Human Exposure Trial Protocol. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:284. [PMID: 38541284 PMCID: PMC11154498 DOI: 10.3390/ijerph21030284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 02/14/2024] [Accepted: 02/24/2024] [Indexed: 06/09/2024]
Abstract
Over the past decade, our understanding of the impact of air pollution on short- and long-term population health has advanced considerably, focusing on adverse effects on cardiovascular and respiratory systems. There is, however, increasing evidence that air pollution exposures affect cognitive function, particularly in susceptible groups. Our study seeks to assess and hazard rank the cognitive effects of prevalent indoor and outdoor pollutants through a single-centre investigation on the cognitive functioning of healthy human volunteers aged 50 and above with a familial predisposition to dementia. Participants will all undertake five sequential controlled exposures. The sources of the air pollution exposures are wood smoke, diesel exhaust, cleaning products, and cooking emissions, with clean air serving as the control. Pre- and post-exposure spirometry, nasal lavage, blood sampling, and cognitive assessments will be performed. Repeated testing pre and post exposure to controlled levels of pollutants will allow for the identification of acute changes in functioning as well as the detection of peripheral markers of neuroinflammation and neuronal toxicity. This comprehensive approach enables the identification of the most hazardous components in indoor and outdoor air pollutants and further understanding of the pathways contributing to neurodegenerative diseases. The results of this project have the potential to facilitate greater refinement in policy, emphasizing health-relevant pollutants and providing details to aid mitigation against pollutant-associated health risks.
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Affiliation(s)
- Thomas Faherty
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
| | - Huda Badri
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, 2nd Floor Education and Research Centre, Wythenshawe Hospital, Southmoor Rd., Manchester M23 9LT, UK; (H.B.); (J.S.)
- Manchester University NHS Foundation Trust, Manchester M13 9WL, UK
| | - Dawei Hu
- Centre for Atmospheric Sciences, Department of Earth and Environmental Science, School of Natural Sciences, University of Manchester, Manchester M13 9PL, UK; (D.H.); (A.V.); (G.M.)
| | - Aristeidis Voliotis
- Centre for Atmospheric Sciences, Department of Earth and Environmental Science, School of Natural Sciences, University of Manchester, Manchester M13 9PL, UK; (D.H.); (A.V.); (G.M.)
- National Centre for Atmospheric Science, Department of Earth and Environmental Science, University of Manchester, Manchester M13 9PL, UK
| | - Francis D. Pope
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
| | - Ian Mudway
- MRC Centre for Environment and Health, Imperial College London, London W12 0BZ, UK;
- NIHR Health Protection Research Unit in Environmental Exposures and Health, Imperial College London, London W12 0BZ, UK
- NIHR Health Protection Research Unit in Chemical and Radiation Threats and Hazards, Imperial College London, London W12 0BZ, UK
| | - Jacky Smith
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, 2nd Floor Education and Research Centre, Wythenshawe Hospital, Southmoor Rd., Manchester M23 9LT, UK; (H.B.); (J.S.)
- Manchester University NHS Foundation Trust, Manchester M13 9WL, UK
| | - Gordon McFiggans
- Centre for Atmospheric Sciences, Department of Earth and Environmental Science, School of Natural Sciences, University of Manchester, Manchester M13 9PL, UK; (D.H.); (A.V.); (G.M.)
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Manzano-Covarrubias AL, Yan H, Luu MDA, Gadjdjoe PS, Dolga AM, Schmidt M. Unravelling the signaling power of pollutants. Trends Pharmacol Sci 2023; 44:917-933. [PMID: 37783643 DOI: 10.1016/j.tips.2023.09.002] [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: 07/24/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 10/04/2023]
Abstract
Exposure to environmental pollutants contributes to diverse pathologies, including pulmonary disease, lower respiratory infections, cancer, and stroke. Pollutants' entry can occur through inhalation, traversing endothelial and epithelial barriers, and crossing the blood-brain barrier, leading to a wide distribution throughout the human body via systemic circulation. Pollutants cause cellular damage by multiple mechanisms encompassing oxidative stress, mitochondrial dysfunction, (neuro)inflammation, and protein instability/proteotoxicity. Sensing pollutants has added a new dimension to disease progression and drug failure. Understanding the molecular pathways and potential receptor binding/signaling that underpin 'sensing' could contribute to ways to combat the detrimental effects of pollutants. We highlight key points of pollutant signaling, crosstalk with receptors acting as drug targets for chronic diseases, and discuss the potential for future therapeutics.
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Affiliation(s)
- Ana L Manzano-Covarrubias
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD, GRIAC, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Hong Yan
- Department of Molecular Pharmacology, University of Groningen, The Netherlands
| | - Minh D A Luu
- Department of Molecular Pharmacology, University of Groningen, The Netherlands
| | - Phoeja S Gadjdjoe
- Department of Molecular Pharmacology, University of Groningen, The Netherlands
| | - Amalia M Dolga
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD, GRIAC, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Martina Schmidt
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD, GRIAC, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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5
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Naserinejad N, Costanian C, Birot O, Barboni T, Roudier E. Wildland fire, air pollution and cardiovascular health: is it time to focus on the microvasculature as a risk assessment tool? Front Physiol 2023; 14:1225195. [PMID: 37538378 PMCID: PMC10394245 DOI: 10.3389/fphys.2023.1225195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 07/06/2023] [Indexed: 08/05/2023] Open
Abstract
Climate change favors weather conditions conducive to wildland fires. The intensity and frequency of forest fires are increasing, and fire seasons are lengthening. Exposure of human populations to smoke emitted by these fires increases, thereby contributing to airborne pollution through the emission of gas and particulate matter (PM). The adverse health outcomes associated with wildland fire exposure represent an important burden on the economies and health systems of societies. Even though cardiovascular diseases (CVDs) are the main of cause of the global burden of diseases attributable to PM exposure, it remains difficult to show reliable associations between exposure to wildland fire smoke and cardiovascular disease risk in population-based studies. Optimal health requires a resilient and adaptable network of small blood vessels, namely, the microvasculature. Often alterations of this microvasculature precede the occurrence of adverse health outcomes, including CVD. Biomarkers of microvascular health could then represent possible markers for the early detection of poor cardiovascular outcomes. This review aims to synthesize the current literature to gauge whether assessing the microvasculature can better estimate the cardiovascular impact of wildland fires.
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Affiliation(s)
- Nazgol Naserinejad
- School of Global Health, Faculty of Health, York University, Toronto, ON, Canada
| | - Christy Costanian
- School of Global Health, Faculty of Health, York University, Toronto, ON, Canada
- Department of Family and Community Medicine, St. Michael’s Hospital, Toronto, ON, Canada
| | - Olivier Birot
- Muscle Health Research Center, School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON, Canada
| | - Toussaint Barboni
- Laboratoire des Sciences Pour l’Environnement (SPE), UMR-CNRS 6134, University of Corsica Pasquale Paoli, Campus Grimaldi, Corte, France
| | - Emilie Roudier
- School of Global Health, Faculty of Health, York University, Toronto, ON, Canada
- Muscle Health Research Center, School of Kinesiology and Health Science, Faculty of Health, York University, Toronto, ON, Canada
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6
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Li J, Liu F, Liang F, Yang Y, Lu X, Gu D. Air pollution exposure and vascular endothelial function: a systematic review and meta-analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:28525-28549. [PMID: 36702984 DOI: 10.1007/s11356-023-25156-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 01/02/2023] [Indexed: 06/18/2023]
Abstract
Vascular endothelial dysfunction is an early stage to cardiovascular diseases (CVDs), but whether air pollution exposure has an effect on it remains unknown. We conducted a systematic review and meta-analysis to summarize epidemiological evidence between air pollution and endothelial dysfunction. We searched the database of PubMed, EMBASE, the Cochrane Library, and Web of Science up to November 10, 2022. Fixed and random effect models were used to pool the effect change or percent change (% change) and 95% confidence interval (95% CI) of vascular function associated with particulate matter (PM) and gaseous pollutants. I2 statistics, funnel plot, and Egger's test were used to evaluate heterogeneity and publication bias. There were 34 articles included in systematic review, and 25 studies included in meta-analysis. For each 10 µg/m3 increment in short-term PM2.5 exposure, augmentation index (AIx) and pulse wave velocity (PWV) increased by 2.73% (95% CI: 1.89%, 3.57%) and 0.56% (95% CI: 0.22%, 0.89%), and flow-mediated dilation (FMD) decreased by 0.17% (95% CI: - 0.33%, - 0.00%). For each 10 µg/m3 increment in long-term PM2.5 exposure, FMD decreased by 0.99% (95% CI: - 1.41%, - 0.57%). The associations between remaining pollutants and outcomes were not statistically significant. The effect of short-term PM2.5 exposure on FMD change was stronger in population with younger age, lower female proportion, higher mean body mass index and higher PM2.5 exposure. Cardiac or vasoactive medication might attenuate this effect. Our study provides evidence that PM2.5 exposure had adverse impact on vascular endothelial function, indicating the importance of air quality improvement for early CVD prevention.
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Affiliation(s)
- Jinyue Li
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China
| | - Fangchao Liu
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China
| | - Fengchao Liang
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuxin Yang
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China
| | - Xiangfeng Lu
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China
| | - Dongfeng Gu
- Department of Epidemiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Key Laboratory of Cardiovascular Epidemiology, Chinese Academy of Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 10037, China.
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen, 518055, China.
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, China.
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7
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Lamorie‐Foote K, Liu Q, Shkirkova K, Ge B, He S, Morgan TE, Mack WJ, Sioutas C, Finch CE, Mack WJ. Particulate matter exposure and chronic cerebral hypoperfusion promote oxidative stress and induce neuronal and oligodendrocyte apoptosis in male mice. J Neurosci Res 2023; 101:384-402. [PMID: 36464774 PMCID: PMC10107949 DOI: 10.1002/jnr.25153] [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: 01/06/2022] [Revised: 10/16/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022]
Abstract
Chronic cerebral hypoperfusion (CCH) may amplify the neurotoxicity of nanoscale particulate matter (nPM), resulting in white matter injury. This study characterized the joint effects of nPM (diameter ≤ 200 nm) and CCH secondary to bilateral carotid artery stenosis (BCAS) exposure on neuronal and white matter injury in a murine model. nPM was collected near a highway and re-aerosolized for exposure. Ten-week-old C57BL/6 male mice were randomized into four groups: filtered air (FA), nPM, FA + BCAS, and nPM + BCAS. Mice were exposed to FA or nPM for 10 weeks. BCAS surgeries were performed. Markers of inflammation, oxidative stress, and apoptosis were examined. nPM + BCAS exposure increased brain hemisphere TNFα protein compared to FA. iNOS and HNE immunofluorescence were increased in the corpus callosum and cerebral cortex of nPM + BCAS mice compared to FA. While nPM exposure alone did not decrease cortical neuronal cell count, nPM decreased corpus callosum oligodendrocyte cell count. nPM exposure decreased mature oligodendrocyte cell count and increased oligodendrocyte precursor cell count in the corpus callosum. nPM + BCAS mice exhibited a 200% increase in cortical neuronal TUNEL staining and a 700% increase in corpus callosum oligodendrocyte TUNEL staining compared to FA. There was a supra-additive interaction between nPM and BCAS on cortical neuronal TUNEL staining (2.6× the additive effects of nPM + BCAS). nPM + BCAS exposure increased apoptosis, neuroinflammation, and oxidative stress in the cerebral cortex and corpus callosum. nPM + BCAS exposure increased neuronal apoptosis above the separate responses to each exposure. However, oligodendrocytes in the corpus callosum demonstrated a greater susceptibility to the combined neurotoxic effects of nPM + BCAS exposure.
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Affiliation(s)
- Krista Lamorie‐Foote
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
- Department of Neurological Surgery, Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Qinghai Liu
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Kristina Shkirkova
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Brandon Ge
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Shannon He
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Todd E. Morgan
- Leonard Davis School of GerontologyUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Wendy J. Mack
- Department of Population and Public Health SciencesUniversity of Southern California, Keck School of MedicineLos AngelesCaliforniaUSA
| | - Constantinos Sioutas
- Department of Civil and Environmental Engineering, Viterbi School of EngineeringUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - Caleb E. Finch
- Leonard Davis School of GerontologyUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
| | - William J. Mack
- Zilkha Neurogenetic InstituteUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
- Department of Neurological Surgery, Keck School of MedicineUniversity of Southern CaliforniaLos AngelesCaliforniaUSA
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8
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Adivi A, JoAnn L, Simpson N, McDonald JD, Lund AK. Traffic-generated air pollution - Exposure mediated expression of factors associated with demyelination in a female apolipoprotein E -/- mouse model. Neurotoxicol Teratol 2022; 90:107071. [PMID: 35016995 PMCID: PMC8904307 DOI: 10.1016/j.ntt.2022.107071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 11/29/2022]
Abstract
Epidemiology studies suggest that exposure to ambient air pollution is associated with demyelinating diseases in the central nervous system (CNS), including multiple sclerosis (MS). The pathophysiology of MS results from an autoimmune response involving increased inflammation and demyelination in the CNS, which is higher in young (adult) females. Exposure to traffic-generated air pollution is associated with neuroinflammation and other detrimental outcomes in the CNS; however, its role in the progression of pathologies associated with demyelinating diseases has not yet been fully characterized in a female model. Thus, we investigated the effects of inhalation exposure to mixed vehicle emissions (MVE) in the brains of both ovary-intact (ov+) and ovariectomized (ov-) female Apolipoprotein (ApoE-/-) mice. Ov + and ov- ApoE-/- mice were exposed via whole-body inhalation to either filtered air (FA, controls) or mixed gasoline and diesel vehicle emissions (MVE: 200 PM μg/m3) for 6 h/d, 7 d/wk., for 30 d. We then analyzed MVE-exposure mediated alterations in myelination, the presence of CD4+ and CD8+ T cells, reactive oxygen species (ROS), myelin oligodendrocyte protein (MOG), and expression of estrogen (ERα and ERβ) and progesterone (PROA/B) receptors in the CNS. MVE-exposure mediated significant alterations in myelination across multiple regions in the cerebrum, as well as increased CD4+ and CD8+ staining. There was also an increase in ROS production in the CNS of MVE-exposed ov- and ov + ApoE-/- mice. Ov- mice displayed a reduction in cerebral ERα mRNA expression, compared to ov + mice; however, MVE exposure resulted in an even further decrease in ERα expression, while ERβ and PRO A/B were unchanged across groups. These findings collectively suggest that inhaled MVE-exposure may mediate estrogen receptor expression alterations associated with increased CD4+/CD8+ infiltration, regional demyelination, and ROS production in the CNS of female ApoE-/- mice.
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Affiliation(s)
- Anna Adivi
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA, 76201
| | - Lucero JoAnn
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA, 76201
| | - Nicholas Simpson
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA, 76201
| | - Jacob D McDonald
- Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, USA, 87108
| | - Amie K. Lund
- Advanced Environmental Research Institute, Department of Biological Sciences, University of North Texas, Denton, TX, USA, 76201.,Corresponding author at: University of North Texas, EESAT – 215, 1704 W. Mulberry, Denton, TX 76201,
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9
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Lecordier S, Manrique-Castano D, El Moghrabi Y, ElAli A. Neurovascular Alterations in Vascular Dementia: Emphasis on Risk Factors. Front Aging Neurosci 2021; 13:727590. [PMID: 34566627 PMCID: PMC8461067 DOI: 10.3389/fnagi.2021.727590] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 08/05/2021] [Indexed: 12/25/2022] Open
Abstract
Vascular dementia (VaD) constitutes the second most prevalent cause of dementia in the world after Alzheimer’s disease (AD). VaD regroups heterogeneous neurological conditions in which the decline of cognitive functions, including executive functions, is associated with structural and functional alterations in the cerebral vasculature. Among these cerebrovascular disorders, major stroke, and cerebral small vessel disease (cSVD) constitute the major risk factors for VaD. These conditions alter neurovascular functions leading to blood-brain barrier (BBB) deregulation, neurovascular coupling dysfunction, and inflammation. Accumulation of neurovascular impairments over time underlies the cognitive function decline associated with VaD. Furthermore, several vascular risk factors, such as hypertension, obesity, and diabetes have been shown to exacerbate neurovascular impairments and thus increase VaD prevalence. Importantly, air pollution constitutes an underestimated risk factor that triggers vascular dysfunction via inflammation and oxidative stress. The review summarizes the current knowledge related to the pathological mechanisms linking neurovascular impairments associated with stroke, cSVD, and vascular risk factors with a particular emphasis on air pollution, to VaD etiology and progression. Furthermore, the review discusses the major challenges to fully elucidate the pathobiology of VaD, as well as research directions to outline new therapeutic interventions.
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Affiliation(s)
- Sarah Lecordier
- Neuroscience Axis, Research Center of CHU de Québec-Université Laval, Québec City, QC, Canada.,Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec City, QC, Canada
| | - Daniel Manrique-Castano
- Neuroscience Axis, Research Center of CHU de Québec-Université Laval, Québec City, QC, Canada.,Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec City, QC, Canada
| | - Yara El Moghrabi
- Neuroscience Axis, Research Center of CHU de Québec-Université Laval, Québec City, QC, Canada.,Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec City, QC, Canada
| | - Ayman ElAli
- Neuroscience Axis, Research Center of CHU de Québec-Université Laval, Québec City, QC, Canada.,Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Québec City, QC, Canada
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