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Armas FV, D’Angiulli A. Neuroinflammation and Neurodegeneration of the Central Nervous System from Air Pollutants: A Scoping Review. TOXICS 2022; 10:666. [PMID: 36355957 PMCID: PMC9698785 DOI: 10.3390/toxics10110666] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
In this scoping review, we provide a selective mapping of the global literature on the effects of air pollution on the life-span development of the central nervous system. Our synthesis first defines developmental neurotoxicants and the model effects of particulate matter. We then discuss air pollution as a test bench for neurotoxicants, including animal models, the framework of systemic inflammation in all affected organs of the body, and the cascade effects on the developing brain, with the most prevalent neurological structural and functional outcomes. Specifically, we focus on evidence on magnetic resonance imaging and neurodegenerative diseases, and the links between neuronal apoptosis and inflammation. There is evidence of a developmental continuity of outcomes and effects that can be observed from utero to aging due to severe or significant exposure to neurotoxicants. These substances alter the normal trajectory of neurological aging in a propulsive way towards a significantly higher rate of acceleration than what is expected if our atmosphere were less polluted. The major aggravating role of this neurodegenerative process is linked with the complex action of neuroinflammation. However, most recent evidence learned from research on the effects of COVID-19 lockdowns around the world suggests that a short-term drastic improvement in the air we breathe is still possible. Moreover, the study of mitohormesis and vitagenes is an emerging area of research interest in anti-inflammatory and antidegenerative therapeutics, which may have enormous promise in combatting the deleterious effects of air pollution through pharmacological and dietary interventions.
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Affiliation(s)
| | - Amedeo D’Angiulli
- Department of Neuroscience, Carleton University, Ottawa, ON K1S 5B6, Canada
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Bridgestock L, Henderson GM, Holdship P, Khaing AM, Naing TT, Myint TA, Htun WW, Khant W, Thu WM, Chi MAN, Baronas JJ, Tipper E, Chapman H, Bickle M. Dissolved trace element concentrations and fluxes in the Irrawaddy, Salween, Sittaung and Kaladan Rivers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 841:156756. [PMID: 35718175 DOI: 10.1016/j.scitotenv.2022.156756] [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: 05/04/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
The Irrawaddy (Ayeyarwaddy) and Salween (Thanlwin) globally rank among the largest rivers for supplying dissolved and particulate material to the ocean. Along with the Sittaung and Kaladan rivers they have societal importance to Myanmar in terms water sources and food production. Despite their importance for global biogeochemical cycles and the ~50 million people who live in their catchments, the chemistry of these rivers is poorly known. This study presents a comprehensive survey of dissolved (<0.22 μm) trace element concentrations (Sr, Fe, Al, Ba, Mn, V, Rb, Cu, Zn, As, Li, Ni, Mo, Cr, U, Pb, Sb, Co, Cs, Tl and Cd) at 38 locations within these river catchments, spanning a period of 2 years. The results highlight the global importance of the Irrawaddy and Salween rivers for trace element global biogeochemical cycles; contributing between 1 and 17 % of global dissolved riverine fluxes to the land-ocean interface for the studied elements. Area normalized dissolved fluxes in these catchments are ~2 to 10 times higher than global average values for most elements, consistent with high rates of chemical weathering. In general, anthropogenic activities have yet to significantly perturb dissolved trace element fluxes in these river systems. The presented dataset should therefore serve as a useful 'natural' baseline, against which future perturbations driven by climate change and/or the development of Myanmar's mining industry could be assessed. Exceptions to this include As in the Sittaung River and Sb, Zn, Pb and As in the Salween River, which may already be significantly impacted by anthropogenic inputs. The former represents a water quality issue of concern for public health, and so constraining the exact sources of As in the Sittaung River should be considered a priority for future research.
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Affiliation(s)
- Luke Bridgestock
- Department of Earth Science, University of Oxford, South Parks Road, Oxford OX1 3AN, UK; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.
| | - Gideon M Henderson
- Department of Earth Science, University of Oxford, South Parks Road, Oxford OX1 3AN, UK
| | - Phil Holdship
- Department of Earth Science, University of Oxford, South Parks Road, Oxford OX1 3AN, UK
| | - Aung Myo Khaing
- Directorate of Water Resources and Improvement of River Systems, Yangon, Myanmar
| | - Tin Tin Naing
- Department of Earth Science, University of Oxford, South Parks Road, Oxford OX1 3AN, UK
| | - Tin Aung Myint
- Department of Geology, Monywa University, Monywa, Myanmar
| | - Wint Wint Htun
- Department of Geology, Pathein University, Pathein, Myanmar
| | - Win Khant
- Department of Geology, Bhamo University, Myanmar
| | - Win Myo Thu
- Advancing Life and Regenerating Motherland (ALARM), Yangon, Myanmar
| | - Mo Aung Nay Chi
- Advancing Life and Regenerating Motherland (ALARM), Yangon, Myanmar
| | - J Jotautas Baronas
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK; Institut de Physique du Globe de Paris, Paris 75005, France
| | - Edward Tipper
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
| | - Hazel Chapman
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
| | - Mike Bickle
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
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Cook MA, Jagpal PS, Hnin Pwint K, San LL, Kyaw Thein SS, Pyone T, Thit WMM, Bradberry SM, Collins S. Systematic Review of Human Poisoning and Toxic Exposures in Myanmar. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073576. [PMID: 33808312 PMCID: PMC8037674 DOI: 10.3390/ijerph18073576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/19/2021] [Accepted: 03/29/2021] [Indexed: 12/03/2022]
Abstract
The International Health Regulations (2005) promote national capacity in core institutions so that countries can better detect, respond to and recover from public health emergencies. In accordance with the ‘all hazards’ approach to public health risk, this systematic review examines poisoning and toxic exposures in Myanmar. A systematic literature search was undertaken to find articles pertaining to poisoning in Myanmar published between 1998 and 2020. A number of poisoning risks are identified in this review, including snakebites, heavy metals, drugs of abuse, agrochemicals and traditional medicine. Patterns of poisoning presented in the literature diverge from poisoning priorities reported in other lower-middle income countries in the region. The experience of professionals working in a Yangon-based poison treatment unit also indicate that frequently observed poisoning as a result of pharmaceuticals, methanol, and petroleum products was absent from the literature. Other notable gaps in the available research include assessments of the public health burden of poisoning through self-harm, household exposures to chemicals, paediatric risk and women’s occupational risk of poisoning. There is a limited amount of research available on poisoning outcomes and routes of exposure in Myanmar. Further investigation and research are warranted to provide a more complete assessment of poisoning risk and incidence.
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Affiliation(s)
- Meghan A. Cook
- Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 0RQ, UK;
- Correspondence:
| | - Pardeep S. Jagpal
- National Poisons Information Service, City Hospital, Birmingham B18 7QH, UK; (P.S.J.); (S.M.B.)
| | - Khin Hnin Pwint
- National Poisons Control Centre, Department of Medical Research, Yangon 11191, Myanmar; (K.H.P.); (L.L.S.); (S.S.K.T.)
| | - Lai Lai San
- National Poisons Control Centre, Department of Medical Research, Yangon 11191, Myanmar; (K.H.P.); (L.L.S.); (S.S.K.T.)
| | - Saint Saint Kyaw Thein
- National Poisons Control Centre, Department of Medical Research, Yangon 11191, Myanmar; (K.H.P.); (L.L.S.); (S.S.K.T.)
| | - Thidar Pyone
- Global Public Health, Public Health England, London SE1 8UG, UK;
| | - Win Moh Moh Thit
- Global Public Health, Public Health England, P.O. Box 638, Yangon, Myanmar;
| | - Sally M. Bradberry
- National Poisons Information Service, City Hospital, Birmingham B18 7QH, UK; (P.S.J.); (S.M.B.)
| | - Samuel Collins
- Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot OX11 0RQ, UK;
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