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Wu C, Wang J, Luo X, Wang B, Zhang X, Song Y, Zhang K, Zhang X, Sun M. Lead exposure induced transgenerational developmental neurotoxicity by altering genome methylation in Drosophila melanogaster. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 271:115991. [PMID: 38237395 DOI: 10.1016/j.ecoenv.2024.115991] [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: 09/13/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 02/05/2024]
Abstract
Heavy metal toxicity is a significant global health concern, with particular attention given to lead (Pb) exposure due to its adverse effects on cognitive development, especially in children exposed to low concentrations. While Pb neurotoxicity has been extensively studied, the analysis and molecular mechanisms underlying the transgenerational effects of Pb exposure-induced neurotoxicity remain poorly understood. In this study, we utilized Drosophila, a powerful developmental animal model, to investigate this phenomenon. Our findings demonstrated that Pb exposure during the developmental stage had a profound effect on the neurodevelopment of F0 fruit flies. Specifically, we observed a loss of correlation between the terminal motor area and muscle fiber area, along with an increased frequency of the β-lobe midline crossing phenotype in mushroom bodies. Western blot analysis indicated altered expression levels of synaptic vesicle proteins, with a decrease in Synapsin (SYN) and an increase in Bruchpilot (BRP) expression, suggesting changes in synaptic vesicle release sites. These findings were corroborated by electrophysiological data, showing an increase in the amplitude of evoked excitatory junctional potential (EJP) and an increase in the frequency of spontaneous excitatory junctional potential (mEJP) following Pb exposure. Importantly, our results further confirmed that the developmental neurotoxicity resulting from grandparental Pb exposure exhibited a transgenerational effect. The F3 offspring displayed neurodevelopmental defects, synaptic function abnormalities, and repetitive behavior despite lacking direct Pb exposure. Our MeDIP-seq analysis further revealed significant alterations in DNA methylation levels in several neurodevelopmental associated genes (eagle, happyhour, neuroglian, bazooka, and spinophilin) in the F3 offspring exposed to Pb. These findings suggest that DNA methylation modifications may underlie the inheritance of acquired phenotypic traits resulting from environmental Pb exposure.
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Affiliation(s)
- Chunyan Wu
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jie Wang
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Xiaoxiao Luo
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Binquan Wang
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Xing Zhang
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yuanyuan Song
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Ke Zhang
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Xiaoyan Zhang
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Mingkuan Sun
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China.
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Mei Z, Liu G, Zhao B, He Z, Gu S. Emerging roles of epigenetics in lead-induced neurotoxicity. ENVIRONMENT INTERNATIONAL 2023; 181:108253. [PMID: 37864902 DOI: 10.1016/j.envint.2023.108253] [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: 07/06/2023] [Revised: 09/19/2023] [Accepted: 10/06/2023] [Indexed: 10/23/2023]
Abstract
Lead is a common environmental heavy metal contaminant. Humans are highly susceptible to lead accumulation in the body, which causes nervous system damage and leads to a variety of nervous system diseases, such as Alzheimer's disease, Parkinson's disease, and autism spectrum disorder. Recent research has focused on the mechanisms of lead-induced neurotoxicity at multiple levels, including DNA methylation, histone modifications, and non-coding RNAs, which are involved in various lead-induced nervous system diseases. We reviewed the latest articles and summarised the emerging roles of DNA methylation, histone modification, and non-coding RNAs in lead-induced neurotoxicity. Our summary provides a theoretical basis and directions for future research on the prevention, diagnosis, and treatment of lead-induced neurological diseases.
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Affiliation(s)
- Zongqin Mei
- Institute of Preventive Medicine, School of Public Health, Dali University, No. 22, Wanhua Road, Dali, Yunnan 671000, People's Republic of China
| | - Guofen Liu
- Institute of Preventive Medicine, School of Public Health, Dali University, No. 22, Wanhua Road, Dali, Yunnan 671000, People's Republic of China
| | - Bo Zhao
- Institute of Preventive Medicine, School of Public Health, Dali University, No. 22, Wanhua Road, Dali, Yunnan 671000, People's Republic of China
| | - Zuoshun He
- Institute of Preventive Medicine, School of Public Health, Dali University, No. 22, Wanhua Road, Dali, Yunnan 671000, People's Republic of China.
| | - Shiyan Gu
- Institute of Preventive Medicine, School of Public Health, Dali University, No. 22, Wanhua Road, Dali, Yunnan 671000, People's Republic of China.
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Wang T, Meng Y, Tu Y, Zhang G, Wang K, Gong S, Zhang Y, Wang T, Li A, Christiani DC, Au W, Xia ZL. Associations between DNA methylation and genotoxicity among lead-exposed workers in China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 316:120528. [PMID: 36341824 DOI: 10.1016/j.envpol.2022.120528] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 10/21/2022] [Accepted: 10/23/2022] [Indexed: 06/16/2023]
Abstract
Studies have shown that lead (Pb) exposure caused genotoxicity, however, the underlying mechanisms remain unclear. A mechanism may be via DNA methylation which is one of the most widely studied epigenetic regulations for cellular activities. Whether this is involved in Pb-induced genotoxicity has rarely been studied. Our study aimed to examine whether DNA methylation was associated with Pb exposure and genotoxicity, and to explore its potential mediating roles. A total of 250 Pb-exposed workers were enrolled. Blood lead levels (BLLs) and genotoxic biomarkers (Micronuclei and Comet) were analyzed. Methylation levels at CpG sites of LINE1 and Alu and promoter region of P53, BRCA1, TRIM36 and OGG1 were measured by pyrosequencing. Generalized linear model (GLM) combined with restricted cubic splines (RCS) were used to analyze relationships between Pb exposure, DNA methylation and genotoxicity. Mediation effect was used to explore mediating roles of DNA methylation. The distribution of BLLs was right-skewed and showed wide ranges from 23.7 to 636.2 μg/L with median (P25, P75) being 218.4 (106.1, 313.9) μg/L among all workers. Micronuclei frequencies showed Poisson distribution [1.94 ± 1.88‰] and Comet tail intensity showed normal distribution [1.69 ± 0.93%]. GLM combined with RCS showed that Alu methylation was negatively associated with BLLs, while P53 and OGG1 methylation were positively associated with BLLs. Micronuclei were negatively associated with Alu and TRIM36 methylation but positively with P53 methylation. Comet was positively associated with P53 and BRCA1 methylation. Mediation effect showed that Alu methylation mediated 7% effects on association between Pb exposure and micronuclei, whereas, P53 methylation mediated 14% and BRCA1 mediated 9% effects on association between Pb exposure and Comet. Our data show that Pb exposure induced changes of global and gene-specific DNA methylation which mediated Pb-induced genotoxicity.
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Affiliation(s)
- Tuanwei Wang
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China; Department of Environmental Health, School of Public Health, Weifang Medical University, Weifang 261053, Shandong Province, China
| | - Yu Meng
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Yuting Tu
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Guanghui Zhang
- Department of Environmental Health, College of Preventive Medicine, Army Medical University, Chongqing, China
| | - Kan Wang
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Shiyang Gong
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Yunxia Zhang
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Tongshuai Wang
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - Anqi Li
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China
| | - David C Christiani
- Environmental Medicine and Epidemiology Program, Department of Environmental Health, Harvard University TH Chan School of Public Health, Boston, MA, USA
| | - William Au
- University of Medicine, Pharmacy, Science and Technology, Targu Mures, Romania, and University of Texas Medical Branch, Galveston, TX, USA
| | - Zhao-Lin Xia
- Department of Occupational Health & Toxicology, School of Public Health, Shanghai Medical College of Fudan University, Shanghai 200032, China; School of Public Health, Xinjiang Medical University, Urumqi 830011, China.
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Jiménez-Garza O, Ghosh M, Barrow TM, Godderis L. Toxicomethylomics revisited: A state-of-the-science review about DNA methylation modifications in blood cells from workers exposed to toxic agents. Front Public Health 2023; 11:1073658. [PMID: 36891347 PMCID: PMC9986591 DOI: 10.3389/fpubh.2023.1073658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/25/2023] [Indexed: 02/22/2023] Open
Abstract
Introduction Epigenetic marks have been proposed as early changes, at the subcellular level, in disease development. To find more specific biomarkers of effect in occupational exposures to toxicants, DNA methylation studies in peripheral blood cells have been performed. The goal of this review is to summarize and contrast findings about DNA methylation in blood cells from workers exposed to toxicants. Methods A literature search was performed using PubMed and Web of Science. After first screening, we discarded all studies performed in vitro and in experimental animals, as well as those performed in other cell types other than peripheral blood cells. Results: 116 original research papers met the established criteria, published from 2007 to 2022. The most frequent investigated exposures/labor group were for benzene (18.9%) polycyclic aromatic hydrocarbons (15.5%), particulate matter (10.3%), lead (8.6%), pesticides (7.7%), radiation (4.3%), volatile organic compound mixtures (4.3%), welding fumes (3.4%) chromium (2.5%), toluene (2.5%), firefighters (2.5%), coal (1.7%), hairdressers (1.7%), nanoparticles (1.7%), vinyl chloride (1.7%), and others. Few longitudinal studies have been performed, as well as few of them have explored mitochondrial DNA methylation. Methylation platforms have evolved from analysis in repetitive elements (global methylation), gene-specific promoter methylation, to epigenome-wide studies. The most reported observations were global hypomethylation as well as promoter hypermethylation in exposed groups compared to controls, while methylation at DNA repair/oncogenes genes were the most studied; studies from genome-wide studies detect differentially methylated regions, which could be either hypo or hypermethylated. Discussion Some evidence from longitudinal studies suggest that modifications observed in cross-sectional designs may be transitory; then, we cannot say that DNA methylation changes are predictive of disease development due to those exposures. Conclusion Due to the heterogeneity in the genes studied, and scarcity of longitudinal studies, we are far away from considering DNA methylation changes as biomarkers of effect in occupational exposures, and nor can we establish a clear functional or pathological correlate for those epigenetic modifications associated with the studied exposures.
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Affiliation(s)
- Octavio Jiménez-Garza
- Health Sciences Institute, Autonomous University of Hidalgo State, Pachuca Hidalgo, Mexico
| | - Manosij Ghosh
- Environment and Health Department, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Timothy M Barrow
- Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland, United Kingdom
| | - Lode Godderis
- Environment and Health Department, Katholieke Universiteit Leuven, Leuven, Belgium
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Elkin ER, Higgins C, Aung MT, Bakulski KM. Metals Exposures and DNA Methylation: Current Evidence and Future Directions. Curr Environ Health Rep 2022; 9:673-696. [PMID: 36282474 PMCID: PMC10082670 DOI: 10.1007/s40572-022-00382-4] [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] [Accepted: 08/22/2022] [Indexed: 01/31/2023]
Abstract
PURPOSE OF THE REVIEW Exposure to essential and non-essential metals is widespread. Metals exposure is linked to epigenetic, particularly DNA methylation, differences. The strength of evidence with respect to the metal exposure type, timing, and level, as well as the DNA methylation association magnitude, and reproducibility are not clear. Focusing on the most recent 3 years, we reviewed the human epidemiologic evidence (n = 26 studies) and the toxicologic animal model evidence (n = 18 studies) for associations between metals exposure and DNA methylation. RECENT FINDINGS In humans, the greatest number of studies focused on lead exposure, followed by studies examining cadmium and arsenic. Approximately half of studies considered metals exposure during the in utero period and measured DNA methylation with the genome-wide Illumina arrays in newborn blood or placenta. Few studies performed formal replication testing or meta-analyses. Toxicology studies of metals and epigenetics had diversity in model systems (mice, rats, drosophila, tilapia, and zebrafish were represented), high heterogeneity of tissues used for DNA methylation measure (liver, testis, ovary, heart, blood, brain, muscle, lung, kidney, whole embryo), and a variety of technologies used for DNA methylation assessment (global, gene specific, genome-wide). The most common metals tested in toxicologic studies were lead and cadmium. Together, the recent studies reviewed provide the strongest evidence for DNA methylation signatures with prenatal metals exposures. There is also mounting epidemiologic evidence supporting lead, arsenic, and cadmium exposures with DNA methylation signatures in adults. The field of metals and DNA methylation is strengthened by the inclusion of both epidemiology and toxicology approaches, and further advancements can be made by coordinating efforts or integrating analyses across studies. Future advances in understanding the molecular basis of sequence specific epigenetic responses to metals exposures, methods for handling exposure mixtures in a genome-wide analytic framework, and pipelines to facilitate collaborative testing will continue to advance the field.
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Affiliation(s)
- Elana R Elkin
- Department of Environmental Health School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Cesar Higgins
- Department of Epidemiology, School of Public Health, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Max T Aung
- Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Kelly M Bakulski
- Department of Epidemiology, School of Public Health, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA.
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Issah I, Arko-Mensah J, Rozek LS, Zarins KR, Dwomoh D, Agyekum TP, Basu N, Batterman S, Robins TG, Fobil JN. Association between toxic and essential metals in blood and global DNA methylation among electronic waste workers in Agbogbloshie, Ghana. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:72946-72956. [PMID: 35614359 DOI: 10.1007/s11356-022-20954-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Aberrant global DNA methylation status is a known biomarker for increased disease risk, especially cancer. There is little published data on the association between toxic and essential metal mixtures and global DNA methylation in electronic waste (e-waste) workers. We aimed to establish the association between toxic and essential metals in blood and the effect of their interactions on global DNA methylation among e-waste recyclers and a reference group in Ghana. We used ICP-MS to measure the level of five metals (Se, Zn, Mn, Cd, and Pb) in the blood of 100 e-waste workers and 51 controls. We quantified blood DNA methylation levels of LINE-1 as an indicator of global DNA methylation. Cd, Mn, and Se levels were significantly higher in the reference group than in e-waste workers. Only Pb was significantly higher in the e-waste workers compared to the controls. Our linear regression analysis results showed a significant inverse association between Zn and LINE-1 DNA methylation (βZn = - 0.912; 95% CI, - 1.512, - 0.306; p = 0.003) which corresponds to a 0.009 decrease in %LINE-1 methylation (95% CI, - 0.015, - 0.003; p = 0.003) for a 1% increase in Zn concentration. Potential interactions between Cd and Zn on global DNA methylation were observed. In summary, co-exposure to toxic and essential metals is associated with global (LINE-1) DNA methylation.
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Affiliation(s)
- Ibrahim Issah
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Accra, Ghana.
| | - John Arko-Mensah
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Accra, Ghana
| | - Laura S Rozek
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Katie R Zarins
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Duah Dwomoh
- Department of Biostatistics, School of Public Health, University of Ghana, Accra, Ghana
| | - Thomas P Agyekum
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Accra, Ghana
| | - Niladri Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada
| | - Stuart Batterman
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Thomas G Robins
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Julius N Fobil
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Accra, Ghana
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Meng Y, Zhou M, Wang T, Zhang G, Tu Y, Gong S, Zhang Y, Christiani DC, Au W, Liu Y, Xia ZL. Occupational lead exposure on genome-wide DNA methylation and DNA damage. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 304:119252. [PMID: 35385786 DOI: 10.1016/j.envpol.2022.119252] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/17/2022] [Accepted: 03/30/2022] [Indexed: 02/05/2023]
Abstract
Lead (Pb) exposure can induce DNA damage and alter DNA methylation but their inter-relationships have not been adequately determined. Our overall aims were to explore such relationships and to evaluate underlying epigenetic mechanisms of Pb-induced genotoxicity in Chinese workers. Blood Pb levels (BLLs) were determined and used as individual's Pb-exposure dose and the Comet assay (i.e., % tail DNA) was conducted to evaluate DNA damage. In the screening assay, 850 K BeadChip sequencing was performed on peripheral blood from 10 controls (BLLs ≤100 μg/L) and 20 exposed workers (i.e., 10 DNA-damaged and 10 DNA-undamaged workers). Using the technique, differentially methylated positions (DMPs) between the controls and the exposed workers were identified. In addition, DMPs were identified between the DNA-undamaged and DNA-damaged workers (% tail DNA >2.14%). In our validation assay, methylation levels of four candidate genes were measured by pyrosequencing in an independent sample set (n = 305), including RRAGC (Ras related GTP binding C), USP1 (Ubiquitin specific protease 1), COPS7B (COP9 signalosome subunit 7 B) and CHEK1 (Checkpoint kinase 1). The result of comparisons between the controls and the Pb-exposed workers show that DMPs were significantly enriched in genes related to nerve conduction and cell cycle. Between DNA-damaged group and DNA-undamaged group, differentially methylated genes were enriched in the pathways related to cell cycle and DNA integrity checkpoints. Additionally, methylation levels of RRAGC and USP1 were negatively associated with BLLs (P < 0.05), and the former mediated 19.40% of the effect of Pb on the % tail DNA. These findings collectively indicated that Pb-induced DNA damage was closely related to methylation of genes in cell cycle regulation, and methylation levels of RRAGC were involved in Pb-induced genotoxicity.
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Affiliation(s)
- Yu Meng
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China
| | - Mengyu Zhou
- The MOE Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Tuanwei Wang
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China
| | - Guanghui Zhang
- Department of Environmental Health, College of Preventive Medicine, Army Medical University, Chongqing, China; Department of Occupational & Environmental Health, School of Public Health, Xinxiang Medical University, Xinxiang, Henan Province, China
| | - Yuting Tu
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China
| | - Shiyang Gong
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China
| | - Yunxia Zhang
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China
| | - David C Christiani
- Environmental Medicine and Epidemiology Program, Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - William Au
- University of Medicine, Pharmacy, Science and Technology, Targu Mures, Romania, and Shantou University Medical College, Shantou, China
| | - Yun Liu
- The MOE Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Zhao-Lin Xia
- Department of Occupational Health & Toxicology, School of Public Health, Fudan University, Shanghai, China; School of Public Health, Xinjiang Medical University, Urumqi, China.
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Issah I, Arko-Mensah J, Rozek LS, Zarins KR, Agyekum TP, Dwomoh D, Basu N, Batterman S, Robins TG, Fobil JN. Global DNA (LINE-1) methylation is associated with lead exposure and certain job tasks performed by electronic waste workers. Int Arch Occup Environ Health 2021; 94:1931-1944. [PMID: 34148106 DOI: 10.1007/s00420-021-01733-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 03/28/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE This study assessed the associations between blood and urine levels of toxic metals; cadmium (Cd) and lead (Pb), and methylation levels of the LINE-1 gene among e-waste and control populations in Ghana. METHODS The study enrolled 100 male e-waste workers and 51 all-male non-e-waste workers or controls. The concentrations of Cd and Pb were measured in blood and urine using inductively coupled plasma mass spectrometry, while LINE1 methylation levels were assessed by pyrosequencing of bisulfite-converted DNA extracted from whole blood. Single and multiple metals linear regression models were used to determine the associations between metals and LINE1 DNA methylation. RESULTS Blood lead (BPb) and urine lead (UPb) showed higher median concentrations among the e-waste workers than the controls (76.82 µg/L vs 40.25 µg/L, p ≤ 0.001; and 6.89 µg/L vs 3.43 µg/L, p ≤ 0.001, respectively), whereas blood cadmium (BCd) concentration was lower in the e-waste workers compared to the controls (0.59 µg/L vs 0.81 µg/L, respectively, p = 0.003). There was no significant difference in LINE1 methylation between the e-waste and controls (85.16 ± 1.32% vs 85.17 ± 1.11%, p = 0.950). In our single metal linear regression models, BPb was significantly inversely associated with LINE1 methylation in the control group (βBPb = - 0.027, 95% CI - 0.045, - 0.010, p = 0.003). In addition, a weak association between BPb and LINE1 was observed in the multiple metals analysis in the e-waste worker group (βBPb = - 0.005, 95% CI - 0.011, 0.000, p = 0.058). CONCLUSION Continuous Pb exposure may interfere with LINE1 methylation, leading to epigenetic alterations, thus serving as an early epigenetic marker for future adverse health outcomes.
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Affiliation(s)
- Ibrahim Issah
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Legon, P.O. Box LG13, Accra, Ghana.
| | - John Arko-Mensah
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Legon, P.O. Box LG13, Accra, Ghana
| | - Laura S Rozek
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Katie R Zarins
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Thomas P Agyekum
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Legon, P.O. Box LG13, Accra, Ghana
| | - Duah Dwomoh
- Department of Biostatistics, School of Public Health, University of Ghana, P.O. Box LG13, Accra, Ghana
| | - Niladri Basu
- Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, Canada
| | - Stuart Batterman
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Thomas G Robins
- Department of Environmental Health Sciences, University of Michigan, 1415 Washington Heights, Ann Arbor, MI, 48109, USA
| | - Julius N Fobil
- Department of Biological, Environmental and Occupational Health Sciences, School of Public Health, University of Ghana, Legon, P.O. Box LG13, Accra, Ghana
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Shiek SS, Mani MS, Kabekkodu SP, Dsouza HS. Health repercussions of environmental exposure to lead: Methylation perspective. Toxicology 2021; 461:152927. [PMID: 34492314 DOI: 10.1016/j.tox.2021.152927] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/23/2021] [Accepted: 09/01/2021] [Indexed: 12/15/2022]
Abstract
Lead (Pb) exposure has been a major public health concern for a long time now due to its permanent adverse effects on the human body. The process of lead toxicity has still not been fully understood, but recent advances in Omics technology have enabled researchers to evaluate lead-mediated alterations at the epigenome-wide level. DNA methylation is one of the widely studied and well-understood epigenetic modifications. Pb has demonstrated its ability to induce not just acute deleterious health consequences but also alters the epi-genome such that the disease manifestation happens much later in life as supported by Barkers Hypothesis of the developmental origin of health and diseases. Furthermore, these alterations are passed on to the next generation. Based on previous in-vivo, in-vitro, and human studies, this review provides an insight into the role of Pb in the development of several human disorders.
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Affiliation(s)
- Sadiya Sadiq Shiek
- Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Monica Shirley Mani
- Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Shama Prasada Kabekkodu
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
| | - Herman S Dsouza
- Department of Radiation Biology and Toxicology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
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Devóz PP, Reis MBD, Gomes WR, Maraslis FT, Ribeiro DL, Antunes LMG, Batista BL, Grotto D, Reis RM, Barbosa F, Barcelos GRM. Adaptive epigenetic response of glutathione (GSH)-related genes against lead (Pb)-induced toxicity, in individuals chronically exposed to the metal. CHEMOSPHERE 2021; 269:128758. [PMID: 33143897 DOI: 10.1016/j.chemosphere.2020.128758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/15/2020] [Accepted: 10/25/2020] [Indexed: 06/11/2023]
Abstract
It is well known that one of the most outstanding adverse effects related to lead (Pb) exposure is oxidative stress; moreover, recent findings suggest that disturbances of the redox status of cells are associated with epigenetic responses, and metabolism of glutathione (GSH) plays an important role in this process. This study aimed to assess Pb exposure on % methylation of GSH-related genes' promoter regions (%CH3-CpG) and their influence on biomarkers of oxidative stress, in workers exposed to the metal. One hundred nine male workers participated in the study; ICP-MS determined blood lead levels (BLL); biochemical parameters related to redox status, named GSH, glutathione peroxidase (GPX) and glutathione-S-transferase (GST) were quantified by UV/Vis spectrophotometry. Determination of %CH3-CpG of genes GCLC, GPX1, GSR, and GSTP1 were done by pyrosequencing. Inverse associations were seen between BLL and %CH3-CpG-GCLC, and %CH3-CpG-GSTP1. Moreover, metal exposure did not impact GSH, GPX, and GST; however, negative associations were observed between %CH3-CpG-GPX1 and %CH3-CpG-GSTP1, and the activities of GPX and GST, respectively. Taken together, our results give further evidence about adaptive epigenetic response to avoid oxidative damage induced by Pb exposure, allowing a better understanding of the molecular mechanisms related to the metal toxicity.
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Affiliation(s)
- Paula Pícoli Devóz
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida Do Café S/n, CEP 14040-903, Ribeirão Preto, SP, Brazil
| | - Mariana Bisarro Dos Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, Rua Antenor Duarte Villela 1331, CEP 14784-400, Barretos, SP, Brazil
| | - Willian Robert Gomes
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida Do Café S/n, CEP 14040-903, Ribeirão Preto, SP, Brazil
| | - Flora Troina Maraslis
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, Avenida Ana Costa 95, CEP 11060-001, Santos, SP, Brazil
| | - Diego Luis Ribeiro
- Departament of Genetics, Ribeirão Preto Medical School, University of São Paulo, Avenida dos Bandeirantes 3900, CEP 14040-901, Ribeirão Preto, SP, Brazil
| | - Lusânia Maria Greggi Antunes
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida Do Café S/n, CEP 14040-903, Ribeirão Preto, SP, Brazil
| | - Bruno Lemos Batista
- Center of Natural and Human Sciences, Federal University of ABC, Avenida Dos Estados 5001, CEP 09210-580, Santo André, SP, Brazil
| | - Denise Grotto
- University of Sorocaba, Rodovia Raposo Tavares km 92.5, CEP 18023-000, Sorocaba, SP, Brazil
| | - Rui Manuel Reis
- Molecular Oncology Research Center, Barretos Cancer Hospital, Rua Antenor Duarte Villela 1331, CEP 14784-400, Barretos, SP, Brazil; Life and Health Sciences Research Institute, School of Medicine, University of Minho, Gualtar Campus, 4710-057, Braga, Portugal; ICVS/3B's-PT Government Associate Laboratory, Gualtar Campus, 4710-057, Braga, Portugal
| | - Fernando Barbosa
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Avenida Do Café S/n, CEP 14040-903, Ribeirão Preto, SP, Brazil
| | - Gustavo Rafael Mazzaron Barcelos
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, Avenida Ana Costa 95, CEP 11060-001, Santos, SP, Brazil.
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de Araújo ML, Gomes BC, Devóz PP, Duarte NDAA, Ribeiro DL, de Araújo AL, Batista BL, Antunes LMG, Barbosa F, Rodrigues AS, Rueff J, Barcelos GRM. Association Between miR-148a and DNA Methylation Profile in Individuals Exposed to Lead (Pb). Front Genet 2021; 12:620744. [PMID: 33679885 PMCID: PMC7928366 DOI: 10.3389/fgene.2021.620744] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/07/2021] [Indexed: 11/13/2022] Open
Abstract
Experimental and epidemiologic studies have shown that lead (Pb) is able to induce epigenetic modifications, such as changes in DNA methylation profiles, in chromatin remodeling, as well as the expression of non-coding RNAs (ncRNAs). However, very little is known about the interactions between microRNAs (miRNAs) expression and DNA methylation status in individuals exposed to the metal. The aim of the present study was to investigate the impact of hsa-miR-148a expression on DNA methylation status, in 85 workers exposed to Pb. Blood and plasma lead levels (BLL and PLL, respectively) were determined by ICP-MS; expression of the miRNA-148a was quantified by RT-qPCR (TaqMan assay) and assessment of the global DNA methylation profile (by measurement of 5-methylcytosine; % 5-mC) was performed by ELISA. An inverse association was seen between miR-148a and % 5-mC DNA, as a function of BLL and PLL (β = −3.7; p = 0.071 and β = −4.1; p = 0.049, respectively) adjusted for age, BMI, smoking, and alcohol consumption. Taken together, our study provides further evidence concerning the interactions between DNA methylation profile and miR-148a, in individuals exposed to Pb.
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Affiliation(s)
- Marília Ladeira de Araújo
- Department of Biosciences, Institute of Health and Society, Federal University of São Paulo, Santos, Brazil
| | - Bruno Costa Gomes
- Center for Toxicogenomics and Human Health, NOVA Medical School (NMS), Universidade Nova de Lisboa, Lisbon, Portugal
| | - Paula Pícoli Devóz
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Diego Luis Ribeiro
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Bruno Lemos Batista
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, Brazil
| | - Lusânia Maria Greggi Antunes
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Barbosa
- Department of Clinical Analyses, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - António Sebastião Rodrigues
- Center for Toxicogenomics and Human Health, NOVA Medical School (NMS), Universidade Nova de Lisboa, Lisbon, Portugal
| | - José Rueff
- Center for Toxicogenomics and Human Health, NOVA Medical School (NMS), Universidade Nova de Lisboa, Lisbon, Portugal
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Lin CY, Lee HL, Hwang YT, Huang PC, Wang C, Sung FC, Wu C, Su TC. Urinary heavy metals, DNA methylation, and subclinical atherosclerosis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 204:111039. [PMID: 32738627 DOI: 10.1016/j.ecoenv.2020.111039] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 07/05/2020] [Accepted: 07/13/2020] [Indexed: 06/11/2023]
Abstract
PURPOSE Lead (Pb) or cadmium (Cd) exposure has been linked to atherosclerosis. Co-exposure of these two heavy metals often occurs in humans. Recent evidence has indicated a crucial role of DNA methylation in atherosclerosis, while Pb or Cd exposure has also been shown to alter DNA methylation. However, it is still unknown whether DNA methylation plays a role in the pathological mechanism of these two heavy metals in atherosclerosis. APPROACH AND RESULTS We enrolled 738 participants (12-30 years) to investigate the association among concentrations of urine Pb or Cd, the 5mdC/dG value (a global DNA methylation marker) and the carotid intima-media thickness (CIMT). When each heavy metal was modeled separately, the results showed urine Pb and Cd concentrations were positively associated with the 5mdC/dG value and CIMT, respectively. When the two heavy metals were analyzed in the same model, urinary Pb concentrations were positively associated with the 5mdC/dG value and CIMT, while urinary Cd concentrations were only positively associated with the CIMT. When Pb and Cd are simultaneously considered in the same logistic regression model, the odds ratios (OR) of thicker CIMT (greater than 75th percentile) with one unit increase in ln-Pb level was 1.67 (95% C.I. = 1.17-2.46, P = 0.005) when levels of 5mdC/dG were above 50th percentile, which is higher than 5mdC/dG bellow the 50th percentile (OR = 1.50 (95% C.I. = 0.96-2.35), P = 0.076). In structural equation model (SEM), Pb or Cd levels are directly associated with CIMT. Moreover, Pb or Cd had an indirect association with CIMT through the 5mdC/dG. When we considered Pb and Cd together, Pb levels had a direct association with CIMT and an indirect association with CIMT through the 5mdC/dG value, while Cd only had a direct association with CIMT. CONCLUSIONS Our findings imply that Pb and Cd exposure might be associated with subclinical atherosclerosis, and global DNA methylation might mediate Pb-associated subclinical atherosclerosis in this young population. Future effort is necessary to elucidate the causal relationship.
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Affiliation(s)
- Chien-Yu Lin
- Department of Internal Medicine, En Chu Kong Hospital, New Taipei City, 237, Taiwan; School of Medicine, Fu Jen Catholic University, New Taipei City, 242, Taiwan; Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan.
| | - Hui-Ling Lee
- Department of Chemistry, Fu Jen Catholic University, New Taipei City, 242, Taiwan
| | - Yi-Ting Hwang
- Department of Statistics, National Taipei University, New Taipei City, 237, Taiwan
| | - Po-Chin Huang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, 350, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, 404, Taiwan
| | - Chikang Wang
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
| | - Fung-Chang Sung
- Department of Health Services Administration, College of Public Health, China Medical University, Taichung, 404, Taiwan
| | - Charlene Wu
- Global Health Program, National Taiwan University, College of Public Health, 10055, Taiwan
| | - Ta-Chen Su
- Department of Environmental and Occupational Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan; Division of Cardiology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan; Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, Taipei, 100, Taiwan.
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Shimokhina NY, Savchenko AA, Petrova MM. Peculiarities of Platelet Metabolism in Patients with Acute Coronary Syndrome with Anxiety-Depressive Disorders and Informativity of Enzymes in the Forecast of Development of Cardiovascular Complications. Pharmaceuticals (Basel) 2020; 13:ph13080169. [PMID: 32731561 PMCID: PMC7466177 DOI: 10.3390/ph13080169] [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: 06/17/2020] [Revised: 07/25/2020] [Accepted: 07/26/2020] [Indexed: 02/06/2023] Open
Abstract
Anxiety–depressive disorders (ADD) are a risk factor of cardiovascular mortality in patients with coronary artery disease (CAD). Acute coronary syndrome (ACS) is the main clinical manifestation of a progressing CAD. Metabolic processes disorder in platelets can be one of the causes of cardiovascular complications in patients with ACS and concomitant ADD. We studied platelets metabolism and prognostic informativity of NAD(P)-dependent dehydrogenases of platelets in ACS patients with ADD in terms of forecasting cardiovascular complications development over a year of observation. The levels of NAD- and NADP-dependent dehydrogenases of platelets were determined by means of a bioluminescent method during the first 24 h after admission to hospital and in dynamics in 10 days. Among 315 examined patients, ADD was found in 161 (51.1%). ACS patients with concomitant ADD had both cytoplasmic and mitochondrial processes impairment in platelets that consisted in a decrease of energy metabolism intensity, inhibition of anaerobic glycolysis reactions and lipid catabolism. After 12 months of follow-up, 41 (25.5%) cardiovascular complications were detected in the group of ACS patients with ADD and 20 (13.0%) in the group of ACS patients without ADD. According to the results of the analysis of the neural network based on NAD(P)-dependent dehydrogenases of platelets activity in ACS patients with ADD, indicators were obtained that are informative for predicting the development of recurrent cardiovascular complications.
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Affiliation(s)
- Natalya Yu. Shimokhina
- Faculty of Medicine, Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Partizan Zheleznyak Street 1, 660022 Krasnoyarsk, Russia; (A.A.S.); (M.M.P.)
- Correspondence: ; Tel.: +7-923-356-9392
| | - Andrey A. Savchenko
- Faculty of Medicine, Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Partizan Zheleznyak Street 1, 660022 Krasnoyarsk, Russia; (A.A.S.); (M.M.P.)
- Laboratory of Molecular and Cellular Physiology and Pathology, Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences, Scientific Research Institute of Medical Problems of the North, Partizan Zheleznyak Street 3g, 660022 Krasnoyarsk, Russia
| | - Marina M. Petrova
- Faculty of Medicine, Prof. V. F. Voino-Yasenetsky Krasnoyarsk State Medical University, Partizan Zheleznyak Street 1, 660022 Krasnoyarsk, Russia; (A.A.S.); (M.M.P.)
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Current status of development of methylation biomarkers for in vitro diagnostic IVD applications. Clin Epigenetics 2020; 12:100. [PMID: 32631437 PMCID: PMC7336678 DOI: 10.1186/s13148-020-00886-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/17/2020] [Indexed: 02/06/2023] Open
Abstract
A significant volume of research clearly shows that disease-related methylation changes can be used as biomarkers at all stages of clinical disease management, including risk assessment and predisposition screening through early diagnostics to personalization of patient care and monitoring of the relapse and chronic disease. Thus disease-related methylation changes are an attractive source of the biomarkers that can have significant impact on precision medicine. However, the translation of the research findings in methylation biomarkers field to clinical practice is at the very least not satisfactory. That is mainly because the evidence generated in research studies indicating the utility of the disease-related methylation change to predict clinical outcome is in majority of the cases not sufficient to postulate the diagnostic use of the biomarker. The research studies need to be followed by well-designed and systematic investigations of clinical utility of the biomarker that produce data of sufficient quality to meet regulatory approval for the test to be used to make clinically valid decision. In this review, we describe methylation-based IVD tests currently approved for IVD use or at the advanced stages of the development for the diagnostic use. For each of those tests, we analyze the technologies that the test utilizes for methylation detection as well as describe the types of the clinical studies that were performed to show clinical validity of the test and warrant regulatory approval. The examples reviewed here should help with planning of clinical investigations and delivery of the clinical evidence required for the regulatory approval of potential methylation biomarker based IVD tests.
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