Environmental and occupational exposure to metals (manganese, mercury, iron) and Parkinson’s disease in low and middle-income countries: a narrative review
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Maria Ana Gonzalez-Alvarez
, David Hernandez-Bonilla
, Noel Isaias Plascencia-Alvarez
, Horacio Riojas-Rodriguez
and Diego Rosselli
Abstract
Objectives
We designed and conducted a narrative review consistent with the PRISMA guidelines (PROSPERO registration number: CRD42018099498) to evaluate the association between environmental metals (manganese, mercury, iron) and Parkinson’s Disease (PD) in low and middle-income countries (LMIC).
Methods
Data sources: A total of 19 databases were screened, and 2,048 references were gathered. Study selection: Randomized controlled trials, cluster trials, cohort studies, case-control studies, nested case-control studies, ecological studies, cross-sectional studies, case series, and case reports carried out in human adults of LMIC, in which the association between at least one of these three metals and the primary outcome were reported. Data extraction: We extracted qualitative and quantitative data. The primary outcome was PD cases, defined by clinical criteria. A qualitative analysis was conducted.
Results
Fourteen observational studies fulfilled the selection criteria. Considerable variation was observed between these studies’ methodologies for the measurement of metal exposure and outcome assessment. A fraction of studies suggested an association between the exposure and primary outcome; nevertheless, these findings should be weighted and appraised on the studies’ design and its implementation limitations, flaws, and implications.
Conclusions
Further research is required to confirm a potential risk of metal exposure and its relationship to PD. To our awareness, this is the first attempt to evaluate the association between environmental and occupational exposure to metals and PD in LMIC settings using the social determinants of health as a framework.
Acknowledgements
This study was conducted in partial fulfillment of the requirements for the award of a Master of Science degree in International Health, Charité - Universitätsmedizin Berlin. We thank all Institute of Tropical Medicine and the International Health Department’s members, especially Dr. Hans-Friedemann Kinkel, for his guidance and support.
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Research funding: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: Authors state no conflict of interest.
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Informed consent: Informed consent was present in all original articles.
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Ethical approval: The Tropical Medicine and the International Health Department in Charité - Universitätsmedizin Berlin approved the conducted research.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Mini Reviews
- Environmental and occupational exposure to metals (manganese, mercury, iron) and Parkinson’s disease in low and middle-income countries: a narrative review
- Novel study on microbial fuel cells via a comprehensive bibliometric and dynamic approach
- The aflatoxin B1 content of peanut-based foods in Iran: a systematic review
- Review Articles
- Hippocampal toxicity of metal base nanoparticles. Is there a relationship between nanoparticles and psychiatric disorders?
- Heat exposure and workers’ health: a systematic review
- Prenatal exposure to persistent organic pollutants as a risk factor of offspring metabolic syndrome development during childhood
- Adverse effects of PM2.5 on cardiovascular diseases
- Effects of non-ionizing electromagnetic fields on flora and fauna, part 1. Rising ambient EMF levels in the environment
- The prevalence of aflatoxin M1 (AFM1) in conventional and industrial dairy products (yogurt, cheese, kashk and dough) of Iran: a systematic review and meta-analysis
- A systematic review on the metabolic effects of chlorpyrifos
- Letter to the Editor
- 5G wireless communication and health effects: a commentary
Articles in the same Issue
- Frontmatter
- Mini Reviews
- Environmental and occupational exposure to metals (manganese, mercury, iron) and Parkinson’s disease in low and middle-income countries: a narrative review
- Novel study on microbial fuel cells via a comprehensive bibliometric and dynamic approach
- The aflatoxin B1 content of peanut-based foods in Iran: a systematic review
- Review Articles
- Hippocampal toxicity of metal base nanoparticles. Is there a relationship between nanoparticles and psychiatric disorders?
- Heat exposure and workers’ health: a systematic review
- Prenatal exposure to persistent organic pollutants as a risk factor of offspring metabolic syndrome development during childhood
- Adverse effects of PM2.5 on cardiovascular diseases
- Effects of non-ionizing electromagnetic fields on flora and fauna, part 1. Rising ambient EMF levels in the environment
- The prevalence of aflatoxin M1 (AFM1) in conventional and industrial dairy products (yogurt, cheese, kashk and dough) of Iran: a systematic review and meta-analysis
- A systematic review on the metabolic effects of chlorpyrifos
- Letter to the Editor
- 5G wireless communication and health effects: a commentary