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Demanelis K, Delgado DA, Tong L, Jasmine F, Ahmed A, Islam T, Parvez F, Kibriya MG, Graziano JH, Ahsan H, Pierce BL. Somatic loss of the Y chromosome is associated with arsenic exposure among Bangladeshi men. Int J Epidemiol 2023; 52:1035-1046. [PMID: 36130227 PMCID: PMC10695470 DOI: 10.1093/ije/dyac176] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 09/01/2022] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Arsenic exposure increases the risk of several cancers in humans and contributes to genomic instability. Somatic loss of the Y chromosome (LoY) is a potential biomarker of genomic instability and cancer risk. Smoking is associated with LoY, but few other carcinogens have been investigated. We tested the cross-sectional association between arsenic exposure and LoY in leukocytes among genotyped Bangladeshi men (age 20-70 years) from the Health Effects of Arsenic Longitudinal Study. METHODS We extracted the median of logR-ratios from probes on the Y chromosome (mLRR-chrY) from genotyping arrays (n = 1364) and estimated the percentage of cells with LoY (% LoY) from mLRR-chrY. We evaluated the association between arsenic exposure (measured in drinking water and urine) and LoY using multivariable linear and logistic regression models. The association between LoY and incident arsenic-induced skin lesions was also examined. RESULTS Ten percent of genotyped men had LoY in at least 5% of cells and % LoY increased with age. Among men randomly selected for genotyping (n = 778), higher arsenic in drinking water, arsenic consumed and urinary arsenic were associated with increased % LoY (P = 0.006, P = 0.06 and P = 0.13, respectively). LoY was associated with increased risk of incident skin lesions (P = 0.008). CONCLUSION Arsenic exposure was associated with increased LoY, providing additional evidence that arsenic contributes to genomic instability. LoY was associated with developing skin lesions, a risk factor for cancer, suggesting that LoY may be a biomarker of susceptibility in arsenic-exposed populations. The effect of arsenic on somatic events should be further explored in cancer-prone tissue types.
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Affiliation(s)
- Kathryn Demanelis
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
| | - Dayana A Delgado
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
| | - Lin Tong
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
| | - Farzana Jasmine
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
| | | | | | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Muhammad G Kibriya
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
- Department of Human Genetics, The University of Chicago, Chicago, IL, USA
- Comprehensive Cancer Center, The University of Chicago, Chicago, IL, USA
- Departments of Medicine and Human Genetics, The University of Chicago, Chicago, IL, USA
| | - Brandon L Pierce
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, USA
- Department of Human Genetics, The University of Chicago, Chicago, IL, USA
- Comprehensive Cancer Center, The University of Chicago, Chicago, IL, USA
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Abuawad AK, Bozack AK, Navas-Acien A, Goldsmith J, Liu X, Hall MN, Ilievski V, Lomax-Luu AM, Parvez F, Shahriar H, Uddin MN, Islam T, Graziano JH, Gamble MV. The Folic Acid and Creatine Trial: Treatment Effects of Supplementation on Arsenic Methylation Indices and Metabolite Concentrations in Blood in a Bangladeshi Population. Environ Health Perspect 2023; 131:37015. [PMID: 36976258 PMCID: PMC10045040 DOI: 10.1289/ehp11270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 02/19/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Chronic arsenic (As) exposure is a global environmental health issue. Inorganic As (InAs) undergoes methylation to monomethyl (MMAs) and dimethyl-arsenical species (DMAs); full methylation to DMAs facilitates urinary excretion and is associated with reduced risk for As-related health outcomes. Nutritional factors, including folate and creatine, influence one-carbon metabolism, the biochemical pathway that provides methyl groups for As methylation. OBJECTIVE Our aim was to investigate the effects of supplementation with folic acid (FA), creatine, or the two combined on the concentrations of As metabolites and the primary methylation index (PMI: MMAs/InAs) and secondary methylation index (SMI: DMAs/MMAs) in blood in Bangladeshi adults having a wide range of folate status. METHODS In a randomized, double-blinded, placebo (PBO)-controlled trial, 622 participants were recruited independent of folate status and assigned to one of five treatment arms: a) PBO (n = 102 ), b) 400 μ g FA/d (400FA; n = 153 ), c) 800 μ g FA/d (800FA; n = 151 ), d) 3 g creatine/d (creatine; n = 101 ), or e) 3 g creatine + 400 μ g of FA / d (creatine + 400 FA ; n = 103 ) for 12 wk. For the following 12 wk, half of the FA participants were randomly switched to the PBO while the other half continued FA supplementation. All participants received As-removal water filters at baseline. Blood As (bAs) metabolites were measured at weeks 0, 1, 12, and 24. RESULTS At baseline, 80.3% (n = 489 ) of participants were folate sufficient (≥ 9 nmol / L in plasma). In all groups, bAs metabolite concentrations decreased, likely due to filter use; for example, in the PBO group, blood concentrations of MMAs (bMMAs) (geometric mean ± geometric standard deviation ) decreased from 3.55 ± 1.89 μ g / L at baseline to 2.73 ± 1.74 at week 1. After 1 wk, the mean within-person increase in SMI for the creatine + 400 FA group was greater than that of the PBO group (p = 0.05 ). The mean percentage decrease in bMMAs between baseline and week 12 was greater for all treatment groups compared with the PBO group [400FA: - 10.4 (95% CI: - 11.9 , - 8.75 ), 800FA: - 9.54 (95% CI: - 11.1 , - 7.97 ), creatine: - 5.85 (95% CI: - 8.59 , - 3.03 ), creatine + 400 FA : - 8.44 (95% CI: - 9.95 , - 6.90 ), PBO: - 2.02 (95% CI: - 4.03 , 0.04)], and the percentage increase in blood DMAs (bDMAs) concentrations for the FA-treated groups significantly exceeded that of PBO [400FA: 12.8 (95% CI: 10.5, 15.2), 800FA: 11.3 (95% CI: 8.95, 13.8), creatine + 400 FA : 7.45 (95% CI: 5.23, 9.71), PBO: - 0.15 (95% CI: - 2.85 , 2.63)]. The mean decrease in PMI and increase in SMI in all FA groups significantly exceeded PBO (p < 0.05 ). Data from week 24 showed evidence of a reversal of treatment effects on As metabolites from week 12 in those who switched from 800FA to PBO, with significant decreases in SMI [- 9.0 % (95% CI: - 3.5 , - 14.8 )] and bDMAs [- 5.9 % (95% CI: - 1.8 , - 10.2 )], whereas PMI and bMMAs concentrations continued to decline [- 7.16 % (95% CI: - 0.48 , - 14.3 ) and - 3.1 % (95% CI: - 0.1 , - 6.2 ), respectively] for those who remained on 800FA supplementation. CONCLUSIONS FA supplementation lowered bMMAs and increased bDMAs in a sample of primarily folate-replete adults, whereas creatine supplementation lowered bMMAs. Evidence of the reversal of treatment effects on As metabolites following FA cessation suggests short-term benefits of supplementation and underscores the importance of long-term interventions, such as FA fortification. https://doi.org/10.1289/EHP11270.
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Affiliation(s)
- Ahlam K. Abuawad
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Anne K. Bozack
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Jeff Goldsmith
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Megan N. Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Angela M. Lomax-Luu
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N. Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Mary V. Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
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Parvez F, Lauer FT, Factor-Litvak P, Islam T, Eunus M, Horayara MA, Rahman M, Sarwar G, Ahsan H, Graziano JH, Burchiel SW. Exposure to arsenic and level of Vitamin D influence the number of Th17 cells and production of IL-17A in human peripheral blood mononuclear cells in adults. PLoS One 2022; 17:e0266168. [PMID: 35404942 PMCID: PMC9000092 DOI: 10.1371/journal.pone.0266168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 03/16/2022] [Indexed: 12/12/2022] Open
Abstract
There is limited evidence on the effects of environmental exposure to arsenic (As) on the immune system in adults. In a population-based study, we have found that urinary As (UAs), and its metabolites [inorganic As (InAs), monomethylated arsenicals (MMA+3/+5), and dimethylated arsenicals (DMA+3/+5)] modulate or influence the number of T-helper 17 (Th17) cells and IL-17A cytokine production. In non-smoking women, we observed that UAs and DMA+3/+5 were associated with changes in Th17 cell numbers in a nonlinear fashion. In smoking males, we found that UAs was associated with a significant decrease of Th17 cell numbers. Similar association was observed among non-smoking males. Likewise, UAs, DMA+3/+5 and MMA+3/+5 were associated with diminished production of IL-17A among non-smoking males. When stratified by Vitamin D levels defined as sufficient (≥20 ng/ml) and insufficient (<20 ng/ml), we found a substancial decrease in Th17 cell numbers among those with insufficient levels. Individuals with sufficient VitD levels demonstrated significant inhibition of IL-17A production in non-smoking males. Collectively, we find that exposure to As via drinking water is associated with alterations in Th17 numbers and IL-17A production, and that these associations may be modified by Vitamin D status. Our findings have significance for health outcomes associated with As exposure.
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Affiliation(s)
- Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, United States of America
- * E-mail:
| | - Fredine T. Lauer
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, New Mexico, United States of America
| | - Pam Factor-Litvak
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, United States of America
| | - Tariqul Islam
- University of Chicago and Columbia University Field Research Office, Dhaka, Bangladesh
| | - Mahbubul Eunus
- University of Chicago and Columbia University Field Research Office, Dhaka, Bangladesh
| | - M. Abu Horayara
- University of Chicago and Columbia University Field Research Office, Dhaka, Bangladesh
| | - Mizanour Rahman
- University of Chicago and Columbia University Field Research Office, Dhaka, Bangladesh
| | - Golam Sarwar
- University of Chicago and Columbia University Field Research Office, Dhaka, Bangladesh
| | - Habibul Ahsan
- Department of Health Studies, University of Chicago, Chicago, Illinois, United States of America
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, United States of America
| | - Scott W. Burchiel
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, Albuquerque, New Mexico, United States of America
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Saxena R, Gamble M, Wasserman GA, Liu X, Parvez F, Navas-Acien A, Islam T, Factor-Litvak P, Uddin MN, Kioumourtzoglou MA, Gibson EA, Shahriar H, Slavkovich V, Ilievski V, LoIacono N, Balac O, Graziano JH. Mixed metals exposure and cognitive function in Bangladeshi adolescents. Ecotoxicol Environ Saf 2022; 232:113229. [PMID: 35131582 PMCID: PMC10045507 DOI: 10.1016/j.ecoenv.2022.113229] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 11/30/2021] [Accepted: 01/20/2022] [Indexed: 05/09/2023]
Abstract
BACKGROUND Over 57 million people in Bangladesh have been chronically exposed to arsenic-contaminated drinking water. They also face environmental exposure to elevated levels of cadmium (Cd), manganese (Mn), and lead (Pb), all of which have been previously observed in environmental and biological samples for this population. These metals have been linked to adverse neurocognitive outcomes in adults and children, though their effects on adolescents are not yet fully characterized. Additionally, previous studies have linked selenium (Se) to protective effects against the toxicity of these other metals. OBJECTIVES To examine the associations between mixed metals exposure and cognitive function in Bangladeshi adolescents. METHODS The Metals, Arsenic, & Nutrition in Adolescents study (MANAs) is a cross-sectional study of 572 Bangladeshi adolescents aged 14-16 years, whose parents were enrolled in the Health Effects of Arsenic Longitudinal Study (HEALS). Biosamples were collected from these adolescents for measurement of whole blood metalloid/metal levels of As, Cd, Mn, Pb, and Se. Participants also completed an abbreviated version of The Cambridge Neuropsychological Test Automated Battery (CANTAB), a cognitive function test designed to measure performance across several aspects of executive function. Linear regression was used to examine associations for each metal while controlling for the other metals. Bayesian Kernel Machine Regression (BKMR) assessed the overall mixture effect in addition to confirming the effects of individual metal components observed via linear regression. RESULTS Linear regression revealed negative associations for Spatial Working Memory and both As and Mn (As B=-2.40, Mn B=-5.31, p < 0.05). We also observed negative associations between Cd and Spatial Recognition Memory (B=-2.77, p < 0.05), and Pb and Delayed Match to Sample, a measure of visual recognition and memory (B=-3.67, p < 0.05). Finally, we saw a positive association for Se and Spatial Span Length (B=0.92, p < 0.05). BKMR results were largely consistent with the regression analysis, showing meaningful associations for individual metals and CANTAB subtests, but no overall mixture effect. Via BKMR, we observed negative associations between Pb and Delayed Match to Sample, and Cd and Spatial Recognition Memory; this analysis also showed positive associations for Se and the Planning, Reaction Time, and Spatial Span subtests. BKMR posterior inclusion probability consistently reported that Se, the only component of the mixture to show a positive association with cognition, was the most important member of the mixture. CONCLUSIONS Overall, we found Se to be positively associated with cognition, while Mn and As were linked to poorer working memory, and Cd and Pb were associated with poorer visual recognition and memory. Our observations are consistent with previous reports on the effects of these metal exposures in adults and children. Our findings also suggest agreement between linear regression and BKMR methods for analyzing metal mixture exposures. Additional studies are needed to evaluate the impact of mixed metals exposure on adverse health and poorer cognition later in life for those exposed during adolescence. Findings also suggest that metal exposure mitigation efforts aimed at adolescents might influence lifelong cognitive outcomes in regions where environmental exposure to metals is endemic.
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Affiliation(s)
| | - Mary Gamble
- Mailman School of Public Health, New York, NY, USA.
| | | | - Xinhua Liu
- Mailman School of Public Health, New York, NY, USA
| | | | | | | | | | | | | | | | | | | | | | | | - Olgica Balac
- Mailman School of Public Health, New York, NY, USA
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Farzan SF, Shahriar M, Kibriya MG, Jasmine F, Sarwar G, Slavkovic V, Graziano JH, Ahsan H, Argos M. Urinary arsenic and relative telomere length in 5-7 year old children in Bangladesh. Environ Int 2021; 156:106765. [PMID: 34273872 PMCID: PMC8380695 DOI: 10.1016/j.envint.2021.106765] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 05/18/2023]
Abstract
BACKGROUND Telomere length has been associated with the occurrence and progression of common chronic and age-related diseases, and in younger populations, may represent a biomarker of disease susceptibility. Early childhood is a critical period for telomere biology as this period is characterized by a rapid decline in telomere length due to a large turnover of highly proliferative cells and may represent a period of unique sensitivity to environmental insults. Arsenic (As) exposure has been associated with both telomere lengthening and shortening in adults and children and some evidence suggests the effects may differ by level and timing of exposure. OBJECTIVES Given the lack of clarity across studies, we investigated the association between urinary As and leukocyte telomere length among 476 five- to seven-year-old children enrolled in the Bangladesh Environmental Research in Children's Health (BiRCH) cohort. METHODS In a series of multivariable models, adjusted for key covariates, we examined associations between urinary As and relative telomere length (RTL) of whole blood DNA. RESULTS We observed small but consistent, negative associations between urinary As and RTL, such that a doubling of urinary As was associated with a -0.017 (95% CI: -0.030, -0.005; p = 0.0056) decrease in RTL, in fully adjusted models. We also observed a somewhat stronger inverse relationship between urinary As concentration and RTL among children born to fathers ≥ 30 years of age at the time of birth, than those < 30 years; however, we did not observe a statistically significant interaction. DISCUSSION Our study suggests that As influences RTL, with detectable associations in early to mid-childhood. Further studies are needed to confirm our findings and investigate the potential long-term impacts of telomere shortening in childhood on later life health outcomes. Additional studies exploring how dose and timing of exposure may relate to RTL are critical to understanding As's relationship to telomere length.
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Affiliation(s)
- Shohreh F Farzan
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States.
| | - Mohammad Shahriar
- UChicago Research Bangladesh, Dhaka, Bangladesh; Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, United States
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, United States
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, United States
| | | | - Vesna Slavkovic
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, United States
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, United States
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, United States
| | - Maria Argos
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois Chicago, Chicago, IL 60612, United States
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Abuawad A, Spratlen MJ, Parvez F, Slavkovich V, Ilievski V, Lomax-Luu AM, Saxena R, Shahriar H, Nasir Uddin M, Islam T, Graziano JH, Navas-Acien A, Gamble MV. Association between body mass index and arsenic methylation in three studies of Bangladeshi adults and adolescents. Environ Int 2021; 149:106401. [PMID: 33549917 PMCID: PMC7976732 DOI: 10.1016/j.envint.2021.106401] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 12/21/2020] [Accepted: 01/12/2021] [Indexed: 05/04/2023]
Abstract
BACKGROUND Water-borne arsenic (As) exposure is a global health problem. Once ingested, inorganic As (iAs) is methylated to mono-methyl (MMA) and dimethyl (DMA) arsenicals via one-carbon metabolism (OCM). People with higher relative percentage of MMA (MMA%) in urine (inefficient As methylation), have been shown to have a higher risk of cardiovascular disease and several cancers but appear to have a lower risk of diabetes and obesity in populations from the US, Mexico, and Taiwan. It is unknown if this opposite pattern with obesity is present in Bangladesh, a country with lower adiposity and higher As exposure in drinking water. OBJECTIVE To characterize the association between body mass index (BMI) and As methylation in Bangladeshi adults and adolescents participating in the Folic Acid and Creatine Trial (FACT); Folate and Oxidative Stress (FOX) study; and Metals, Arsenic, and Nutrition in Adolescents Study (MANAS). METHODS Arsenic species (iAs, MMA, DMA) were measured in urine and blood. Height and weight were measured to calculate BMI. The associations between concurrent BMI with urine and blood As species were analyzed using linear regression models, adjusting for nutrients involved in OCM such as choline. In FACT, we also evaluated the prospective association between weight change and As species. RESULTS Mean BMIs were 19.2/20.4, 19.8/21.0, and 17.7/18.7 kg/m2 in males/females in FACT, FOX, and MANAS, respectively. BMI was associated with As species in female but not in male participants. In females, after adjustment for total urine As, age, and plasma folate, the adjusted mean differences (95% confidence) in urinary MMA% and DMA% for a 5 kg/m2 difference in BMI were -1.21 (-1.96, -0.45) and 2.47 (1.13, 3.81), respectively in FACT, -0.66 (-1.56, 0.25) and 1.43 (-0.23, 3.09) in FOX, and -0.59 (-1.19, 0.02) and 1.58 (-0.15, 3.30) in MANAS. The associations were attenuated after adjustment for choline. Similar associations were observed with blood As species. In FACT, a 1-kg of weight increase over 2 to 10 (mean 5.4) years in males/females was prospectively associated with mean DMA% that was 0.16%/0.19% higher. DISCUSSION BMI was negatively associated with MMA% and positively associated with %DMA in females but not males in Bangladesh; associations were attenuated after plasma choline adjustment. These findings may be related to the role of body fat on estrogen levels that can influence one-carbon metabolism, e.g. by increasing choline synthesis. Research is needed to determine whether the associations between BMI and As species are causal and their influence on As-related health outcomes.
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Affiliation(s)
- Ahlam Abuawad
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Miranda J Spratlen
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Faruque Parvez
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Angela M Lomax-Luu
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Roheeni Saxena
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | | | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H Graziano
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States
| | - Mary V Gamble
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, United States.
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Saxena R, Liu X, Navas-Acien A, Parvez F, LoIacono NJ, Islam T, Uddin MN, Ilievski V, Slavkovich V, Balac O, Graziano JH, Gamble MV. Nutrition, one-carbon metabolism and arsenic methylation in Bangladeshi adolescents. Environ Res 2021; 195:110750. [PMID: 33476663 PMCID: PMC7987757 DOI: 10.1016/j.envres.2021.110750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 01/04/2021] [Accepted: 01/12/2021] [Indexed: 05/13/2023]
Abstract
BACKGROUND Over 57 million people in Bangladesh are chronically exposed to arsenic-contaminated drinking water. Ingested inorganic arsenic (InAs) undergoes hepatic methylation generating monomethyl- (MMAs) and dimethyl- (DMAs) arsenic species in a process that facilitates urinary As (uAs) elimination. One-carbon metabolism (OCM), a biochemical pathway that is influenced by folate and vitamin B12, facilitates the methylation of As. OCM also supports nucleotide and amino acid synthesis, particularly during periods of rapid growth such as adolescence. While folate supplementation increases As methylation and lowers blood As (bAs) in adults, little data is available for adolescents. OBJECTIVES To examine the associations between OCM-related micronutrients and As methylation in Bangladeshi adolescents chronically exposed to As-contaminated drinking water. METHODS We conducted a cross-sectional study of 679 Bangladeshi adolescents, including 320 boys and 359 girls aged 14-16 years. Nutritional status was assessed by red blood cell (RBC) folate, plasma folate, plasma B12 and homocysteine (Hcys). Arsenic-related outcomes included blood arsenic (bAs), urinary arsenic (uAs), and urinary arsenic metabolites expressed as a percentage of total urinary As: %InAs, %MMAs, %DMAs. RESULTS Boys had significantly lower B12, higher Hcys, higher bAs, higher uAs, higher %MMAs, and a trend toward lower RBC folate compared to girls. Therefore, regression analyses controlling for water As and BMI were sex stratified. Among girls, RBC folate was inversely associated with bAs, plasma B12 was inversely associated with uAs, and plasma Hcys was inversely associated with %MMA. Among boys, plasma folate was inversely associated with %InAs and positively associated with %DMA, RBC folate was inversely associated with %InAs and positively associated with %MMA, while Hcys was positively associated with %InAs. CONCLUSIONS These findings suggest that associations between OCM nutritional status, bAs, and distribution of As metabolites in adolescents are similar to previously reported observations in adults and in children. The As methylation findings are statistically significant among boys but not among girls; this may be related to estrogen which more strongly influences OCM in females. The inverse association between Hcys and %MMA in girls is somewhat unexpected given that Hcys is known to be an indicator of impaired OCM and low folate/B12 in adults. Overall, these results indicate that the associations between OCM-related micronutrients and arsenic methylation in adolescents are generally similar to prior findings in adults, though these associations may differ by sex. Additionally, these findings suggest that more investigation into the role of Hcys in adolescent physiology is needed, perhaps particularly for girls. Additional studies are needed to evaluate the impact of OCM and As methylation on As-related adverse health outcomes (such as cancer and cardiovascular disease) in people exposed to As during adolescence.
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Affiliation(s)
| | - Xinhua Liu
- Mailman School of Public Health, New York, NY, USA
| | | | | | | | - Tariqul Islam
- Columbia University Arsenic Project Office, Mohakhali, Dhaka, Bangladesh
| | | | | | | | - Olgica Balac
- Mailman School of Public Health, New York, NY, USA
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Shih YH, Howe CG, Scannell Bryan M, Shahriar M, Kibriya MG, Jasmine F, Sarwar G, Graziano JH, Persky VW, Jackson B, Ahsan H, Farzan SF, Argos M. Exposure to metal mixtures in relation to blood pressure among children 5-7 years old: An observational study in Bangladesh. Environ Epidemiol 2021; 5:e135. [PMID: 33778363 PMCID: PMC7939402 DOI: 10.1097/ee9.0000000000000135] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 01/15/2021] [Indexed: 02/07/2023] Open
Abstract
Hypertension in later life, a significant risk factor for cardiovascular disease, has been linked to elevated blood pressure in early life. Exposure to metals may influence childhood blood pressure; however, previous research is limited and has mainly focused on evaluating the toxicity of single metal exposures. This study evaluates the associations between exposure to metal mixtures and blood pressure among Bangladeshi children age 5-7 years. METHODS We investigated the associations of 17 toenail metal concentrations with blood pressure using linear regression models. Principal component analysis (PCA), weighted quantile sum (WQS) regression, and Bayesian kernel machine regression (BKMR) were conducted as secondary analyses. RESULTS Associations were observed for selenium with diastolic blood pressure (per doubling of exposure β = 2.91, 95% confidence interval [CI] = 1.08, 4.75), molybdenum with systolic (β = 0.33, 95% CI = 0.05, 0.61) and diastolic blood pressure (β = 0.39, 95% CI = 0.12, 0.66), tin with systolic blood pressure (β = -0.33, 95% CI = -0.60, -0.06), and mercury with systolic (β = -0.83, 95% CI = -1.49, -0.17) and diastolic blood pressure (β = -0.89, 95% CI = -1.53, -0.26). Chromium was associated with diastolic blood pressure among boys only (β = 1.10, 95% CI = 0.28, 1.92, P for interaction = 0.02), and copper was associated with diastolic blood pressure among girls only (β = -1.97, 95% CI = -3.63, -0.32, P for interaction = 0.01). These findings were largely robust to the secondary analyses that utilized mixture modeling approaches (PCA, WQS, and BKMR). CONCLUSIONS Future prospective studies are needed to investigate further the impact of early life exposure to metal mixtures on children's blood pressure trajectories and cardiovascular disease risk later in life.
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Affiliation(s)
- Yu-Hsuan Shih
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois Chicago, Chicago, Illinois
| | - Caitlin G. Howe
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Dartmouth College, Lebanon, New Hampshire
| | - Molly Scannell Bryan
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois Chicago, Chicago, Illinois
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Dartmouth College, Lebanon, New Hampshire
- Institute for Minority Health Research, College of Medicine, University of Illinois Chicago, Chicago, Illinois
- UChicago Research Bangladesh, Dhaka, Bangladesh
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
- Trace Element Analysis Core Laboratory, Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | | | - Muhammad G. Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
| | | | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Victoria W. Persky
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois Chicago, Chicago, Illinois
| | - Brian Jackson
- Trace Element Analysis Core Laboratory, Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
| | - Shohreh F. Farzan
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Maria Argos
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois Chicago, Chicago, Illinois
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9
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Bozack AK, Howe CG, Hall MN, Liu X, Slavkovich V, Ilievski V, Lomax-Luu AM, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Gamble MV. Betaine and choline status modify the effects of folic acid and creatine supplementation on arsenic methylation in a randomized controlled trial of Bangladeshi adults. Eur J Nutr 2020; 60:1921-1934. [PMID: 32918135 DOI: 10.1007/s00394-020-02377-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/28/2020] [Indexed: 01/24/2023]
Abstract
PURPOSE Methylation of ingested inorganic arsenic (InAs) to monomethyl- (MMAs) and dimethyl-arsenical species (DMAs) facilitates urinary arsenic elimination. Folate and creatine supplementation influenced arsenic methylation in a randomized controlled trial. Here, we examine if baseline status of one-carbon metabolism nutrients (folate, choline, betaine, and vitamin B12) modified the effects of FA and creatine supplementation on changes in homocysteine, guanidinoacetate (GAA), total blood arsenic, and urinary arsenic metabolite proportions and indices. METHODS Study participants (N = 622) received 400 or 800 μg FA, 3 g creatine, 400 μg FA + 3 g creatine, or placebo daily for 12 weeks. RESULTS Relative to placebo, FA supplementation was associated with greater mean increases in %DMAs among participants with betaine concentrations below the median than those with levels above the median (FDR < 0.05). 400 μg FA/day was associated with a greater decrease in homocysteine among participants with plasma folate concentrations below, compared with those above, the median (FDR < 0.03). Creatine treatment was associated with a significant decrease in %MMAs among participants with choline concentrations below the median (P = 0.04), but not among participants above the median (P = 0.94); this effect did not significantly differ between strata (P = 0.10). CONCLUSIONS Effects of FA and creatine supplementation on arsenic methylation capacity were greater among individuals with low betaine and choline status, respectively. The efficacy of FA and creatine interventions to facilitate arsenic methylation may be modified by choline and betaine nutritional status. CLINICAL TRIAL REGISTRATION Clinical Trial Registry Identifier: NCT01050556, U.S. National Library of Medicine, https://clinicaltrials.gov ; registered January 15, 2010.
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Affiliation(s)
- Anne K Bozack
- Division of Pulmonary Medicine, Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Caitlin G Howe
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA.,Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA
| | - Megan N Hall
- Department of Epidemiology, Columbia University, New York, NY, USA.,Department of Environmental and Occupational Health Sciences, SUNY Downstate School of Public Health, Brooklyn, NY, USA.,Department of Epidemiology, SUNY Downstate School of Public Health, Brooklyn, NY, USA
| | - Xinhua Liu
- Department of Biostatistics, Columbia University, New York, NY, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Angela M Lomax-Luu
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1107E, New York, NY, 10032, USA.
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10
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Parvez F, Akhtar E, Khan L, Haq MA, Islam T, Ahmed D, Eunus HEMM, Hasan AKMR, Ahsan H, Graziano JH, Raqib R. Exposure to low-dose arsenic in early life alters innate immune function in children. J Immunotoxicol 2019; 16:201-209. [PMID: 31703545 PMCID: PMC7041495 DOI: 10.1080/1547691x.2019.1657993] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 08/01/2019] [Accepted: 08/16/2019] [Indexed: 01/06/2023] Open
Abstract
Early-life exposure to arsenic (As) increases risks of respiratory diseases/infections in children. However, data on the ability of the innate immune system to combat bacterial infections in the respiratory tracts of As-exposed children are scarce. To evaluate whether persistent low-dose As exposure alters innate immune function among children younger than 5 years-of-age, mothers and participating children (N = 51) that were members of the Health Effects of Arsenic Longitudinal Study (HEALS) cohort in rural Bangladesh were recruited. Household water As, past and concurrent maternal urinary As (U-As) as well as child U-As were all measured at enrollment. In addition, U-As metabolites were evaluated. Innate immune function was examined via measures of cathelicidin LL-37 in plasma, ex vivo monocyte-derived-macrophage (MDM)-mediated killing of Streptococcus pneumoniae (Spn), and serum bactericidal antibody (SBA) responses against Haemophilus influenzae type b (Hib). Cyto-/chemokines produced by isolated peripheral blood mononuclear cells (PBMC) were assayed using a Multiplex system. Multivariable linear regression analyses revealed that maternal (p < 0.01) and child (p = 0.02) U-As were positively associated with plasma LL-37 levels. Decreased MDM-mediated Spn killing (p = 0.05) and SBA responses (p = 0.02) were seen to be each associated with fractions of mono-methylarsonic acid (MMA; a U-As metabolite) in the children. In addition, U-As levels were seen to be negatively associated with PBMC formation of fractalkine and IL-7, and positively associated with that for IL-13, IL-17 and MIP-1α. These findings suggested that early-life As exposure may disrupt the innate host defense pathway in these children. It is possible that such disruptions may have health consequences later in life.
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Affiliation(s)
- Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, USA
| | - Evana Akhtar
- Infectious Diseases Division, icddr,b, Dhaka-1212, Bangladesh
| | - Lamia Khan
- Infectious Diseases Division, icddr,b, Dhaka-1212, Bangladesh
| | - Md. Ahsanul Haq
- Infectious Diseases Division, icddr,b, Dhaka-1212, Bangladesh
| | - Tariqul Islam
- Columbia University and University of Chicago Research office in Bangladesh, Dhaka-1212, Bangladesh
| | - Dilruba Ahmed
- Laboratory Sciences and Services Division, icddr,b, Dhaka-1212, Bangladesh
| | - HEM Mahbubul Eunus
- Columbia University and University of Chicago Research office in Bangladesh, Dhaka-1212, Bangladesh
| | - AKM Rabiul Hasan
- Columbia University and University of Chicago Research office in Bangladesh, Dhaka-1212, Bangladesh
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, 5841 South Maryland Avenue, Chicago, IL
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, USA
| | - Rubhana Raqib
- Infectious Diseases Division, icddr,b, Dhaka-1212, Bangladesh
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11
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Chen Y, Wu F, Liu X, Parvez F, LoIacono NJ, Gibson EA, Kioumourtzoglou MA, Levy D, Shahriar H, Uddin MN, Islam T, Lomax A, Saxena R, Sanchez T, Santiago D, Ellis T, Ahsan H, Wasserman GA, Graziano JH. Early life and adolescent arsenic exposure from drinking water and blood pressure in adolescence. Environ Res 2019; 178:108681. [PMID: 31520830 PMCID: PMC7010462 DOI: 10.1016/j.envres.2019.108681] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/14/2019] [Accepted: 08/18/2019] [Indexed: 05/26/2023]
Abstract
OBJECTIVES Evidence of the association between inorganic arsenic (As) exposure, especially early-life exposure, and blood pressure (BP) in adolescence is limited. We examined the association of As exposure during early childhood, childhood, and adolescence with BP in adolescence. METHODS We conducted a cross-sectional study of 726 adolescents aged 14-17 (mean 14.75) years whose mothers were participants in the Bangladesh Health Effects of Arsenic Longitudinal Study (HEALS). Adolescents' BP was measured at the time of their recruitment between December 2012 and December 2016. We considered maternal urinary As (UAs), repeatedly measured during childhood, as proxy measures of early childhood (<5 years old, A1) and childhood (5-12 years old, A2) exposure. Adolescents' current UAs was collected at the time of recruitment (14-17 years of age, A3). RESULTS Every doubling of UAs at A3 and maternal UAs at A1 was positively associated with a difference of 0.7-mmHg (95% confidence interval [CI]: 0.1, 1.3) and a 0.7-mmHg (95% CI: 0.05, 1.4) in SBP, respectively. These associations were stronger in adolescents with a BMI above the median (17.7 kg/m2) than those with a BMI below the median (P for interaction = 0.03 and 0.03, respectively). There was no significant association between any of the exposure measures and DBP. The Weighted Quantile Sum (WQS) regression confirmed that adolescents' UAs at A3 and maternal UAs at A1 contributed the most to the overall effect of As exposure at three life stages on SBP. Mixture analyses using Bayesian Kernel Machine Regression identified UAs at A3 as a significant contributor to SBP and DBP independent of other concurrent blood levels of cadmium, lead, manganese, and selenium. CONCLUSION Our findings suggest an association of current exposure and early childhood exposure to As with higher BP in adolescents, which may be exacerbated by higher BMI at adolescence.
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Affiliation(s)
- Yu Chen
- Departments of Population Health, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA.
| | - Fen Wu
- Departments of Population Health, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Xinhua Liu
- Department of Biostatistics, New York, NY, USA
| | - Faruque Parvez
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Nancy J LoIacono
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Elizabeth A Gibson
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | | | - Diane Levy
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | | | | | - Taruqul Islam
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | - Angela Lomax
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Roheeni Saxena
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Tiffany Sanchez
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - David Santiago
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Tyler Ellis
- Lamont-Doherty Earth Observatory, Columbia University, New York, NY, USA
| | - Habibul Ahsan
- Department of Health Studies, Center for Cancer Epidemiology and Prevention, The University of Chicago, Chicago, IL, USA
| | - Gail A Wasserman
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Joseph H Graziano
- Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
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12
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Navasumrit P, Chaisatra K, Promvijit J, Parnlob V, Waraprasit S, Chompoobut C, Binh TT, Hai DN, Bao ND, Hai NK, Kim KW, Samson LD, Graziano JH, Mahidol C, Ruchirawat M. Correction to: Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study. Environ Health 2019; 18:68. [PMID: 31340827 PMCID: PMC6657026 DOI: 10.1186/s12940-019-0504-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Following publication of the original article [1], the author reported that incorrect version of Tables 1, 3, 5 and 6 were published.
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Affiliation(s)
- Panida Navasumrit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400, Thailand
| | - Krittinee Chaisatra
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Jeerawan Promvijit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Varabhorn Parnlob
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Somchamai Waraprasit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Chalida Chompoobut
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Ta Thi Binh
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Doan Ngoc Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Duy Bao
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Khac Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Kyoung-Woong Kim
- International Environmental Research Center, Gwangju Institute of Science and Technology, Gwangju, South Korea
| | - Leona D Samson
- Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Columbia University, New York, USA
| | - Chulabhorn Mahidol
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand
| | - Mathuros Ruchirawat
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210, Thailand.
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400, Thailand.
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13
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Sanchez TR, Powers M, Perzanowski M, George CM, Graziano JH, Navas-Acien A. A Meta-analysis of Arsenic Exposure and Lung Function: Is There Evidence of Restrictive or Obstructive Lung Disease? Curr Environ Health Rep 2019; 5:244-254. [PMID: 29637476 DOI: 10.1007/s40572-018-0192-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Hundreds of millions of people worldwide are exposed to arsenic via contaminated water. The goal of this study was to identify whether arsenic-associated lung function deficits resemble obstructive- or restrictive-like lung disease, in order to help illuminate a mechanistic pathway and identify at-risk populations. RECENT FINDINGS We recently published a qualitative systematic review outlining the body of research on arsenic and non-malignant respiratory outcomes. Evidence from several populations, at different life stages, and at different levels of exposure showed consistent associations of arsenic exposure with chronic lung disease mortality, respiratory symptoms, and lower lung function levels. The published review, however, only conducted a broad qualitative description of the published studies without considering specific spirometry patterns, without conducting a meta-analysis, and without evaluating the dose-response relationship. We searched PubMed and Embase for studies on environmental arsenic exposure and lung function. We performed a meta-analysis using inverse-variance-weighted random effects models to summarize adjusted effect estimates for arsenic and forced expiratory volume in one second (FEV1), forced vital capacity (FVC), and FEV1/FVC ratio. Across nine studies, median water arsenic levels ranged from 23 to 860 μg/L. The pooled estimated mean difference (MD) comparing the highest category of arsenic exposure (ranging from > 11 to > 800 μg/L) versus the lowest (ranging from < 10 to < 100 μg/L) for each study for FEV1 was - 42 mL (95% confidence interval (CI) - 70, - 16) and for FVC was - 50 mL (95% CI - 63, - 37). Three studies reported effect estimates for FEV1/FVC, for which there was no evidence of an association; the pooled estimated MD was 0.01 (95% CI - 0.005, 0.024). This review supports that arsenic is associated with restrictive impairments based on inverse associations between arsenic and FEV1 and FVC, but not with FEV1/FVC. Future studies should confirm whether low-level arsenic exposure is a restrictive lung disease risk factor in order to identify at-risk populations in the USA.
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Affiliation(s)
- Tiffany R Sanchez
- Department of Environmental Health Sciences, Columbia University, 722 W 168 ST, Suite 1105, New York, NY, 10032, USA.
| | - Martha Powers
- Department of Environmental Health and Engineering, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Matthew Perzanowski
- Department of Environmental Health Sciences, Columbia University, 722 W 168 ST, Suite 1105, New York, NY, 10032, USA
| | - Christine M George
- Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Columbia University, 722 W 168 ST, Suite 1105, New York, NY, 10032, USA
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Columbia University, 722 W 168 ST, Suite 1105, New York, NY, 10032, USA
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14
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Navasumrit P, Chaisatra K, Promvijit J, Parnlob V, Waraprasit S, Chompoobut C, Binh TT, Hai DN, Bao ND, Hai NK, Kim KW, Samson LD, Graziano JH, Mahidol C, Ruchirawat M. Exposure to arsenic in utero is associated with various types of DNA damage and micronuclei in newborns: a birth cohort study. Environ Health 2019; 18:51. [PMID: 31174534 PMCID: PMC6555940 DOI: 10.1186/s12940-019-0481-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 04/16/2019] [Indexed: 05/07/2023]
Abstract
BACKGROUND Growing evidence indicates that in utero arsenic exposures in humans may increase the risk of adverse health effects and development of diseases later in life. This study aimed to evaluate potential health risks of in utero arsenic exposure on genetic damage in newborns in relation to maternal arsenic exposure. METHODS A total of 205 pregnant women residing in arsenic-contaminated areas in Hanam province, Vietnam, were recruited. Prenatal arsenic exposure was determined by arsenic concentration in mother's toenails and urine during pregnancy and in umbilical cord blood collected at delivery. Genetic damage in newborns was assessed by various biomarkers of early genetic effects including oxidative/nitrative DNA damage (8-hydroxydeoxyguanosine, 8-OHdG, and 8-nitroguanine), DNA strand breaks and micronuclei (MN) in cord blood. RESULTS Maternal arsenic exposure, measured by arsenic levels in toenails and urine, was significantly increased (p < 0.05) in subjects residing in areas with high levels of arsenic contamination in drinking water. Cord blood arsenic level was significantly increased in accordance with maternal arsenic exposure (p < 0.001). Arsenic exposure in utero is associated with genotoxic effects in newborns indicated as increased levels of 8-OHdG, 8-nitroguanine, DNA strand breaks and MN frequency in cord blood with increasing levels of maternal arsenic exposure. Maternal toenail arsenic level was significantly associated with all biomarkers of early genetic effects, while cord blood arsenic levels associated with DNA strand breaks and MN frequency. CONCLUSIONS In utero arsenic exposure is associated with various types of genetic damage in newborns potentially contributing to the development of diseases, including cancer, later in life.
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Affiliation(s)
- Panida Navasumrit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400 Thailand
| | - Krittinee Chaisatra
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Jeerawan Promvijit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Varabhorn Parnlob
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Somchamai Waraprasit
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Chalida Chompoobut
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Ta Thi Binh
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Doan Ngoc Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Duy Bao
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Nguyen Khac Hai
- National Institute of Occupational and Environmental Health, Hanoi, Vietnam
| | - Kyoung-Woong Kim
- International Environmental Research Center, Gwangju Institute of Science and Technology, Gwangju, South Korea
| | - Leona D. Samson
- Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge, USA
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Columbia University, New York, USA
| | - Chulabhorn Mahidol
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
| | - Mathuros Ruchirawat
- Laboratories of Environmental Toxicology/Chemical Carcinogenesis, Chulabhorn Research Institute, Laksi, Bangkok, 10210 Thailand
- Center of Excellence on Environmental Health and Toxicology, CHE, Ministry of Education, Ratchathewi, Bangkok, 10400 Thailand
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15
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Pierce BL, Tong L, Dean S, Argos M, Jasmine F, Rakibuz-Zaman M, Sarwar G, Islam MT, Shahriar H, Islam T, Rahman M, Yunus M, Lynch VJ, Oglesbee D, Graziano JH, Kibriya MG, Gamble MV, Ahsan H. Correction: A missense variant in FTCD is associated with arsenic metabolism and toxicity phenotypes in Bangladesh. PLoS Genet 2019; 15:e1008172. [PMID: 31107898 PMCID: PMC6527204 DOI: 10.1371/journal.pgen.1008172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pgen.1007984.].
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Demanelis K, Argos M, Tong L, Shinkle J, Sabarinathan M, Rakibuz-Zaman M, Sarwar G, Shahriar H, Islam T, Rahman M, Yunus M, Graziano JH, Broberg K, Engström K, Jasmine F, Ahsan H, Pierce BL. Association of Arsenic Exposure with Whole Blood DNA Methylation: An Epigenome-Wide Study of Bangladeshi Adults. Environ Health Perspect 2019; 127:57011. [PMID: 31135185 PMCID: PMC6791539 DOI: 10.1289/ehp3849] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 04/23/2019] [Accepted: 04/23/2019] [Indexed: 05/13/2023]
Abstract
BACKGROUND Arsenic exposure affects [Formula: see text] people worldwide, including [Formula: see text] in Bangladesh. Arsenic exposure increases the risk of cancer and other chronic diseases, and one potential mechanism of arsenic toxicity is epigenetic dysregulation. OBJECTIVE We assessed associations between arsenic exposure and genome-wide DNA methylation measured at baseline among 396 Bangladeshi adults participating in the Health Effects of Arsenic Longitudinal Study (HEALS) who were exposed by drinking naturally contaminated well water. METHODS Methylation in whole blood DNA was measured at [Formula: see text] using the Illumina InfiniumMethylationEPIC (EPIC) array. To assess associations between arsenic exposure and CpG methylation, we used linear regression models adjusted for covariates and surrogate variables (SVs) (capturing unknown technical and biologic factors). We attempted replication and conducted a meta-analysis using an independent dataset of [Formula: see text] from 400 Bangladeshi individuals with arsenical skin lesions. RESULTS We identified 34 CpGs associated with [Formula: see text] creatinine-adjusted urinary arsenic [[Formula: see text]]. Sixteen of these CpGs annotated to the [Formula: see text] array, and 10 associations were replicated ([Formula: see text]). The top two CpGs annotated upstream of the ABR gene (cg01912040, cg10003262 ). All urinary arsenic-associated CpGs were also associated with arsenic concentration measured in drinking water ([Formula: see text]). Meta-analysis ([Formula: see text] samples) identified 221 urinary arsenic-associated CpGs ([Formula: see text]). The arsenic-associated CpGs from the meta-analysis were enriched in non-CpG islands and shores ([Formula: see text]) and depleted in promoter regions ([Formula: see text]). Among the arsenic-associated CpGs ([Formula: see text]), we observed significant enrichment of genes annotating to the reactive oxygen species pathway, inflammatory response, and tumor necrosis factor [Formula: see text] ([Formula: see text]) signaling via nuclear factor kappa-B ([Formula: see text]) hallmarks ([Formula: see text]). CONCLUSIONS The novel and replicable associations between arsenic exposure and DNA methylation at specific CpGs observed in this work suggest that epigenetic alterations should be further investigated as potential mediators in arsenic toxicity and as biomarkers of exposure and effect in exposed populations. https://doi.org/10.1289/EHP3849.
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Affiliation(s)
- Kathryn Demanelis
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Maria Argos
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lin Tong
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Justin Shinkle
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Mekala Sabarinathan
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | | | - Golam Sarwar
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | - Hasan Shahriar
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | - Tariqul Islam
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | - Mahfuzar Rahman
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
- Research and Evaluation Division, BRAC, Dhaka, Bangladesh
| | - Mohammad Yunus
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Karin Broberg
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Karin Engström
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
- Department of Human Genetics, University of Chicago, Chicago, Illinois, USA
- University of Chicago Comprehensive Cancer Center, University of Chicago, Chicago, Illinois, USA
- Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Brandon L. Pierce
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois, USA
- Department of Human Genetics, University of Chicago, Chicago, Illinois, USA
- University of Chicago Comprehensive Cancer Center, University of Chicago, Chicago, Illinois, USA
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17
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Bulka CM, Scannell Bryan M, Persky VW, Daviglus ML, Durazo-Arvizu RA, Parvez F, Slavkovich V, Graziano JH, Islam T, Baron JA, Ahsan H, Argos M. Changes in blood pressure associated with lead, manganese, and selenium in a Bangladeshi cohort. Environ Pollut 2019; 248:28-35. [PMID: 30771745 PMCID: PMC6517081 DOI: 10.1016/j.envpol.2019.01.129] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 01/07/2019] [Accepted: 01/31/2019] [Indexed: 05/19/2023]
Abstract
BACKGROUND Heavy metal contamination is widespread in Bangladesh. Previous studies have observed lead increases blood pressure over time. However, the role of other metal contaminants and essential micronutrients, which could also adversely affect blood pressure or act as protective factors, is understudied. OBJECTIVES We therefore evaluated the associations of lead, manganese, and selenium with blood and pulse pressure trajectories. METHODS We prospectively followed placebo-assigned participants nested within a randomized trial for the prevention of arsenic-related skin cancer (n = 255). Blood lead, manganese, and selenium were measured at baseline; blood pressure was measured at baseline and at 3 biennial follow-up examinations. Mixed-effect linear regression models were used to estimate associations with average annual changes in systolic, diastolic, and pulse pressure. RESULTS In models simultaneously adjusted for baseline blood lead, manganese, and selenium concentrations in addition to other potential confounders, lead was linearly associated with increases in systolic blood pressure, but not with diastolic blood pressure or pulse pressure. A non-linear association was observed for manganese, such that mid-range concentrations were associated with decreases in systolic, diastolic, and pulse pressure. Baseline selenium concentrations in the highest quartile were also associated with longitudinal decreases in both systolic and diastolic blood pressure, while null associations were observed with pulse pressure. In exploratory analyses, the combination of mid-range manganese and high selenium concentrations completely offset lead-associated increases in blood and pulse pressure. CONCLUSIONS The results indicate a direct, linear association of lead exposure with systolic blood pressure, and manganese and selenium exposures within certain ranges may have a blood pressure-lowering effect in this population.
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Affiliation(s)
- Catherine M Bulka
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, School of Public Health, Chicago, IL, USA
| | - Molly Scannell Bryan
- Institute for Health Research and Policy, University of Illinois at Chicago, Chicago, IL, USA
| | - Victoria W Persky
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, School of Public Health, Chicago, IL, USA
| | - Martha L Daviglus
- Institute for Minority Health Research, University of Illinois, College of Medicine, Chicago, IL, USA
| | - Ramon A Durazo-Arvizu
- Institute for Minority Health Research, University of Illinois, College of Medicine, Chicago, IL, USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | | | - John A Baron
- Department of Medicine, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, USA
| | - Maria Argos
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, School of Public Health, Chicago, IL, USA.
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Pierce BL, Tong L, Dean S, Argos M, Jasmine F, Rakibuz-Zaman M, Sarwar G, Islam MT, Shahriar H, Islam T, Rahman M, Yunus M, Lynch VJ, Oglesbee D, Graziano JH, Kibriya MG, Gamble MV, Ahsan H. A missense variant in FTCD is associated with arsenic metabolism and toxicity phenotypes in Bangladesh. PLoS Genet 2019; 15:e1007984. [PMID: 30893314 PMCID: PMC6443193 DOI: 10.1371/journal.pgen.1007984] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 04/01/2019] [Accepted: 01/23/2019] [Indexed: 12/02/2022] Open
Abstract
Inorganic arsenic (iAs) is a carcinogen, and exposure to iAs via food and water is a global public health problem. iAs-contaminated drinking water alone affects >100 million people worldwide, including ~50 million in Bangladesh. Once absorbed into the blood stream, most iAs is converted to mono-methylated (MMA) and then di-methylated (DMA) forms, facilitating excretion in urine. Arsenic metabolism efficiency varies among individuals, in part due to genetic variation near AS3MT (arsenite methyltransferase; 10q24.32). To identify additional arsenic metabolism loci, we measured protein-coding variants across the human exome for 1,660 Bangladeshi individuals participating in the Health Effects of Arsenic Longitudinal Study (HEALS). Among the 19,992 coding variants analyzed exome-wide, the minor allele (A) of rs61735836 (p.Val101Met) in exon 3 of FTCD (formiminotransferase cyclodeaminase) was associated with increased urinary iAs% (P = 8x10-13), increased MMA% (P = 2x10-16) and decreased DMA% (P = 6x10-23). Among 2,401 individuals with arsenic-induced skin lesions (an indicator of arsenic toxicity and cancer risk) and 2,472 controls, carrying the low-efficiency A allele (frequency = 7%) was associated with increased skin lesion risk (odds ratio = 1.35; P = 1x10-5). rs61735836 is in weak linkage disequilibrium with all nearby variants. The high-efficiency/major allele (G/Valine) is human-specific and eliminates a start codon at the first 5´-proximal Kozak sequence in FTCD, suggesting selection against an alternative translation start site. FTCD is critical for catabolism of histidine, a process that generates one-carbon units that can enter the one-carbon/folate cycle, which provides methyl groups for arsenic metabolism. In our study population, FTCD and AS3MT SNPs together explain ~10% of the variation in DMA% and support a causal effect of arsenic metabolism efficiency on arsenic toxicity (i.e., skin lesions). In summary, this work identifies a coding variant in FTCD associated with arsenic metabolism efficiency, providing new evidence supporting the established link between one-carbon/folate metabolism and arsenic toxicity.
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Affiliation(s)
- Brandon L. Pierce
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
- Department of Human Genetics, The University of Chicago, Chicago, IL, United States of America
- Comprehensive Cancer Center, The University of Chicago, Chicago, IL United States of America
| | - Lin Tong
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
| | - Samantha Dean
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
| | - Maria Argos
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, Chicago, IL, United States of America
| | - Farzana Jasmine
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
| | | | - Golam Sarwar
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | | | - Hasan Shahriar
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | - Tariqul Islam
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
| | - Mahfuzar Rahman
- UChicago Research Bangladesh, Mohakhali, Dhaka, Bangladesh
- Research and Evaluation Division, BRAC, Dhaka, Bangladesh
| | - Md. Yunus
- International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Vincent J. Lynch
- Department of Human Genetics, The University of Chicago, Chicago, IL, United States of America
| | - Devin Oglesbee
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, United States of America
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, United States of America
| | - Muhammad G. Kibriya
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
| | - Mary V. Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, United States of America
| | - Habibul Ahsan
- Department of Public Health Sciences, The University of Chicago, Chicago, IL, United States of America
- Department of Human Genetics, The University of Chicago, Chicago, IL, United States of America
- Comprehensive Cancer Center, The University of Chicago, Chicago, IL United States of America
- Department of Medicine, The University of Chicago, Chicago, IL, United States of America
- Institute for Population and Precision Health, The University of Chicago, Chicago, IL, United States of America
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19
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Wu F, Yang L, Islam MT, Jasmine F, Kibriya MG, Nahar J, Barmon B, Parvez F, Sarwar G, Ahmed A, Eunus M, Islam T, Slavkovich V, Hu J, Li H, Graziano JH, Pei Z, Ahsan H, Chen Y. The role of gut microbiome and its interaction with arsenic exposure in carotid intima-media thickness in a Bangladesh population. Environ Int 2019; 123:104-113. [PMID: 30503971 PMCID: PMC6371773 DOI: 10.1016/j.envint.2018.11.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/20/2018] [Accepted: 11/20/2018] [Indexed: 05/10/2023]
Abstract
BACKGROUND Emerging data suggest that inorganic arsenic exposure and gut microbiome are associated with the risk of cardiovascular disease. The gut microbiome may modify disease risk associated with arsenic exposure. Our aim was to examine the inter-relationships between arsenic exposure, the gut microbiome, and carotid intima-media thickness (IMT)-a surrogate marker for atherosclerosis. METHODS We recruited 250 participants from the Health Effects of Arsenic Longitudinal Study in Bangladesh, measured IMT and collected fecal samples in year 2015-2016. 16S rRNA gene sequencing was conducted on microbial DNA extracted from the fecal samples. Arsenic exposure was measured using data on arsenic concentration in drinking water wells over time to derive a time-weighted water arsenic index. Multivariable linear regression models were used to test the inter-relationships between arsenic exposure, relative abundance of selected bacterial taxa from phylum to genus levels, and IMT. RESULTS We identified nominally significant associations between arsenic exposure, measured using either time-weighted water arsenic or urinary arsenic, and the relative abundances of several bacterial taxa from the phylum Tenericutes, Proteobacteria, and Firmicutes. However, none of the associations retained significance after correction for multiple testing. The relative abundances of the family Aeromonadaceae and genus Citrobacter were significantly associated with IMT after correction for multiple testing (P-value = 0.02 and 0.03, respectively). Every 1% increase in the relative abundance of Aeromonadaceae and Citrobacter was related to an 18.2-μm (95% CI: 7.8, 28.5) and 97.3-μm (95% CI: 42.3, 152.3) difference in IMT, respectively. These two taxa were also the only selected family and genus using the LASSO variable selection method. There was a significant interaction between Citrobacter and time-weighted water arsenic in IMT (P for interaction = 0.04). CONCLUSIONS Our findings suggest a role of Citrobacter in the development of atherosclerosis, especially among individuals with higher levels of arsenic exposure.
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Affiliation(s)
- Fen Wu
- Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Liying Yang
- Departments of Pathology and Medicine, New York University School of Medicine, New York, NY, USA; The Department of Veterans Affairs New York Harbor Healthcare System, New York, NY, USA
| | | | - Farzana Jasmine
- Department of Health Studies, Center for Cancer Epidemiology and Prevention, The University of Chicago, Chicago, IL, USA
| | - Muhammad G Kibriya
- Department of Health Studies, Center for Cancer Epidemiology and Prevention, The University of Chicago, Chicago, IL, USA
| | - Jebun Nahar
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | | | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Golam Sarwar
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | | | - Mahbub Eunus
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | - Tariqul Islam
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jiyuan Hu
- Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Huilin Li
- Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Zhiheng Pei
- Departments of Pathology and Medicine, New York University School of Medicine, New York, NY, USA; The Department of Veterans Affairs New York Harbor Healthcare System, New York, NY, USA
| | - Habibul Ahsan
- Department of Health Studies, Center for Cancer Epidemiology and Prevention, The University of Chicago, Chicago, IL, USA.
| | - Yu Chen
- Department of Population Health, New York University School of Medicine, New York, NY, USA; Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA.
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20
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Bozack AK, Hall MN, Liu X, Ilievski V, Lomax-Luu AM, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Gamble MV. Folic acid supplementation enhances arsenic methylation: results from a folic acid and creatine supplementation randomized controlled trial in Bangladesh. Am J Clin Nutr 2019; 109:380-391. [PMID: 30590411 PMCID: PMC6367980 DOI: 10.1093/ajcn/nqy148] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 06/19/2018] [Indexed: 02/02/2023] Open
Abstract
Background Arsenic exposure through drinking water persists in many regions. Inorganic As (InAs) is methylated to monomethyl-arsenical species (MMAs) and dimethyl-arsenical species (DMAs), facilitating urinary excretion. Arsenic methylation is dependent on one-carbon metabolism, which is influenced by nutritional factors such as folate and creatine. Objective This study investigated the effects of folic acid (FA) and/or creatine supplementation on the proportion of As metabolites in urine. Design In a 24-wk randomized, double-blinded, placebo-controlled trial, 622 participants were assigned to receive FA (400 or 800 μg per day), 3 g creatine per day, 400 μg FA + 3 g creatine per day, or placebo. The majority of participants were folate sufficient; all received As-removal water filters. From wk 12-24, half of the participants receiving FA received placebo. Results Among groups receiving FA, the mean decrease in ln(%InAs) and %MMAs and increase in %DMAs exceeded those of the placebo group at wk 6 and 12 (P < 0.05). In the creatine group, the mean decrease in %MMAs exceeded that of the placebo group at wk 6 and 12 (P < 0.05); creatine supplementation did not affect change in %InAs or %DMAs. The decrease in %MMAs at wk 6 and 12 was larger in the 800 µg FA than in the 400 µg FA group (P = 0.034). There were no differences in treatment effects between the 400 µg FA and creatine + FA groups. Data suggest a rebound in As metabolite proportions after FA cessation; at wk 24, log(%InAs) and %DMAs were not significantly different than baseline levels among participants who discontinued FA supplementation. Conclusions The results of this study confirm that FA supplementation rapidly and significantly increases methylation of InAs to DMAs. Further research is needed to understand the strong cross-sectional associations between urinary creatinine and As methylation in previous studies. This trial was registered at https://clinicaltrials.gov as NCT01050556.
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Affiliation(s)
| | | | - Xinhua Liu
- Biostatistics, Columbia University, New York, NY
| | | | | | | | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | | | - Mary V Gamble
- Departments of Environmental Health Sciences,Address correspondence to MVG (e-mail: )
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21
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Sanchez TR, Slavkovich V, LoIacono N, van Geen A, Ellis T, Chillrud SN, Balac O, Islam T, Parvez F, Ahsan H, Graziano JH, Navas-Acien A. Urinary metals and metal mixtures in Bangladesh: Exploring environmental sources in the Health Effects of Arsenic Longitudinal Study (HEALS). Environ Int 2018; 121:852-860. [PMID: 30343184 PMCID: PMC6231410 DOI: 10.1016/j.envint.2018.10.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/20/2018] [Accepted: 10/16/2018] [Indexed: 05/13/2023]
Abstract
INTRODUCTION Environmental exposure to toxic metals and metalloids is pervasive and occurs from multiple sources. The Health Effects of Arsenic Longitudinal Study (HEALS) is an ongoing prospective study predominantly focused on understanding health effects associated with arsenic exposure from drinking water. The goal of this project was to measure a suite of elements in urine to better understand potential exposure patterns and to identify common environmental sources of exposure among this semi-rural Bangladeshi population. METHODS In a random sample of 199 adult HEALS participants (50% female), the concentrations of 15 urinary elements (As, Ba, Cd, Co, Cs, Cu, Mn, Mo, Ni, Pb, Se, Sr, Tl, W, Zn) were assessed by Inductively-Coupled Plasma Mass Spectrometry (ICP-MS) to assess commonalities with sociodemographic characteristics and potential sources of exposure. We used principal component analysis (PCA) with varimax normalized rotations, and hierarchical cluster analysis (CA), using Ward's method with Euclidean distances, to evaluate these relationships. RESULTS PCA and CA showed similar patterns, suggesting 6 principal components (PC) and 5 clusters: 1)PC: Sr-Ni-Cs/ CA: Sr-Ni-Co; 2) Pb-Tl/Pb-Tl-Se-Cs; 3) As-Mo-W/As-Mo-W; 4) Ba-Mn/Ba-Mn; 5) Cu-Zn/Cu-Zn-Cd; and 6) Cd. There was a strong significant association between the As-Mo-W PC/cluster and water arsenic levels (p < 0.001) and between the Cd PC and betel nut use (p = 0.003). The Sr-Ni-Cs PC was not related to any of the socio-demographic characteristics investigated, including smoking status and occupation. The first PC, Sr-Ni-Cs, explained 21% of the variability; the third PC, As-Mo-W, explained 12.5% of the variability; and the sixth PC, Cd, explained 10% of the variability. Day laborers appeared to have the highest exposure. CONCLUSIONS Groundwater and betel nut use are likely important sources of metal and metalloid exposure in this population. These findings will guide future exposure assessment research in Bangladesh and future epidemiologic research investigating the degree to which metal mixtures play a role in disease development.
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Affiliation(s)
- Tiffany R Sanchez
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA.
| | - Vesna Slavkovich
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
| | - Nancy LoIacono
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
| | - Alexander van Geen
- Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, USA
| | - Tyler Ellis
- Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, USA
| | - Steven N Chillrud
- Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, USA
| | - Olgica Balac
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
| | - Tarique Islam
- Columbia University Arsenic Project Office, Dhaka, Bangladesh
| | - Faruque Parvez
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
| | - Habib Ahsan
- University of Chicago, 5841 South Maryland Ave, Chicago, IL 60637, USA
| | - Joseph H Graziano
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
| | - Ana Navas-Acien
- Mailman School of Public Health, Columbia University, 722 W 168 St, New York, NY 10032, USA
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22
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Wasserman GA, Liu X, Parvez F, Chen Y, Factor-Litvak P, LoIacono NJ, Levy D, Shahriar H, Uddin MN, Islam T, Lomax A, Saxena R, Gibson EA, Kioumourtzoglou MA, Balac O, Sanchez T, Kline JK, Santiago D, Ellis T, van Geen A, Graziano JH. A cross-sectional study of water arsenic exposure and intellectual function in adolescence in Araihazar, Bangladesh. Environ Int 2018; 118:304-313. [PMID: 29933234 PMCID: PMC6358166 DOI: 10.1016/j.envint.2018.05.037] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 05/16/2018] [Accepted: 05/18/2018] [Indexed: 05/05/2023]
Abstract
BACKGROUND Exposure to inorganic arsenic (As) from drinking water is associated with modest deficits in intellectual function in young children; it is unclear whether deficits occur during adolescence, when key brain functions are more fully developed. OBJECTIVES We sought to determine the degree to which As exposure is associated with adolescent intelligence, and the contributory roles of lead, cadmium, manganese and selenium. METHODS We recruited a cross-section of 726 14-16 year olds (mean age = 14.8 years) whose mothers are participants in the Bangladesh Health Effects of Arsenic Longitudinal Study (HEALS), and whose household well water As levels, which varied widely, were well characterized. Using a culturally modified version of the WISC-IV, we examined raw Full Scale scores, and Verbal Comprehension, Perceptual Reasoning, Working Memory and Processing Speed Indices. Blood levels of As (BAs), Mn, Pb, Cd and Se were assessed at the time of the visit, as was creatinine-adjusted urinary As (UAs/Cr). RESULTS Linear regression analyses revealed that BAs was significantly negatively associated with all WISC-IV scores except for Perceptual Reasoning. With UAs/Cr as the exposure variable, we observed significantly negative associations for all WISC-IV scores. Except for Se, blood levels of other metals, were also associated with lower WISC-IV scores. Controlling for covariates, doubling BAs, or UAs/Cr, was associated with a mean decrement (95% CI) of 3.3 (1.1, 5.5), or 3.0 (1.2, 4.5) points, respectively, in raw Full scale scores with a sample mean of 177.6 (SD = 36.8). Confirmatory analyses using Bayesian Kernel Machine Regression, which identifies important mixture members, supported these findings; the primary contributor of the mixture was BAs, followed by BCd. CONCLUSIONS Our data indicate that the adverse consequences of As exposure on neurodevelopment observed in other cross-sectional studies of younger children are also apparent during adolescence. They also implicate Cd as a neurotoxic element that deserves more attention.
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Affiliation(s)
- Gail A Wasserman
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA; New York State Psychiatric Institute, NY, New York, USA
| | - Xinhua Liu
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Faruque Parvez
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Yu Chen
- New York University, New York, NY, USA
| | - Pam Factor-Litvak
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Nancy J LoIacono
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Diane Levy
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Hasan Shahriar
- Columbia University Arsenic Project Office, Mohakali, Dhaka, Bangladesh
| | | | - Tariqul Islam
- Columbia University Arsenic Project Office, Mohakali, Dhaka, Bangladesh
| | - Angela Lomax
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Roheeni Saxena
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | | | | | - Olgica Balac
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Tiffany Sanchez
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jennie K Kline
- New York State Psychiatric Institute, NY, New York, USA; Mailman School of Public Health, Columbia University, New York, NY, USA
| | - David Santiago
- Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Tyler Ellis
- Lamont-Doherty Earth Observatory, Columbia University, NY, New York, USA
| | - Alexander van Geen
- Lamont-Doherty Earth Observatory, Columbia University, NY, New York, USA
| | - Joseph H Graziano
- Mailman School of Public Health, Columbia University, New York, NY, USA.
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23
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Zhang C, Kibriya MG, Jasmine F, Roy S, Gao J, Sabarinathan M, Shinkle J, Delgado D, Ahmed A, Islam T, Eunus M, Islam MT, Hasan R, Graziano JH, Ahsan H, Pierce BL. A study of telomere length, arsenic exposure, and arsenic toxicity in a Bangladeshi cohort. Environ Res 2018; 164:346-355. [PMID: 29567420 PMCID: PMC6647858 DOI: 10.1016/j.envres.2018.03.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 03/02/2018] [Accepted: 03/03/2018] [Indexed: 06/01/2023]
Abstract
BACKGROUND Chronic arsenic exposure is associated with increased risk for arsenical skin lesions, cancer, and other adverse health outcomes. One potential mechanism of arsenic toxicity is telomere dysfunction. However, prior epidemiological studies of arsenic exposure, telomere length (TL), and skin lesion are small and cross-sectional. We investigated the associations between arsenic exposure and TL and between baseline TL and incident skin lesion risk among individuals participating in the Health Effects of Arsenic Longitudinal Study in Bangladesh (2000-2009). METHODS Quantitative PCR was used to measure the average TL of peripheral blood DNA collected at baseline. The association between baseline arsenic exposure (well water and urine) and TL was estimated in a randomly-selected subcohort (n = 1469). A nested case-control study (466 cases and 464 age- and sex-matched controls) was used to estimate the association between baseline TL and incident skin lesion risk (diagnosed < 8 years after baseline). RESULTS No association was observed between arsenic exposure (water or urine) and TL. Among incident skin lesion cases and matched controls, we observed higher skin lesion risk among individuals with shorter TL (Ptrend = 1.5 × 10-5) with odds ratios of 2.60, 1.59, and 1.10 for the first (shortest), second, and third TL quartiles compared to the fourth (longest). CONCLUSIONS Arsenic exposure was not associated with TL among Bangladeshi adults, suggesting that leukocyte TL may not reflect a primary mode of action for arsenic's toxicity. However, short TL was associated with increased skin lesion risk, and may be a biomarker of arsenic susceptibility modifying arsenic's effect on skin lesion risk.
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Affiliation(s)
- Chenan Zhang
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States; Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, United States
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | - Shantanu Roy
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States; Centers for Disease Control and Prevention, Atlanta, GA 30329, United States
| | - Jianjun Gao
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | - Mekala Sabarinathan
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | - Justin Shinkle
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | - Dayana Delgado
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States
| | | | | | | | | | | | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, United States
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States; Department of Human Genetics, University of Chicago, Chicago, IL 60615, United States; Comprehensive Cancer Center, University of Chicago, Chicago, IL 60615, United States; Department of Medicine, University of Chicago, Chicago, IL 60615, United States
| | - Brandon L Pierce
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60615, United States; Department of Human Genetics, University of Chicago, Chicago, IL 60615, United States; Comprehensive Cancer Center, University of Chicago, Chicago, IL 60615, United States.
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24
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Niedzwiecki MM, Liu X, Zhu H, Hall MN, Slavkovich V, Ilievski V, Levy D, Siddique AB, Kibriya MG, Parvez F, Islam T, Ahmed A, Navas-Acien A, Graziano JH, Finnell RH, Ahsan H, Gamble MV. Serum homocysteine, arsenic methylation, and arsenic-induced skin lesion incidence in Bangladesh: A one-carbon metabolism candidate gene study. Environ Int 2018; 113:133-142. [PMID: 29421402 PMCID: PMC5873983 DOI: 10.1016/j.envint.2018.01.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/28/2017] [Accepted: 01/18/2018] [Indexed: 05/18/2023]
Abstract
BACKGROUND Inorganic arsenic (As) is methylated via one carbon metabolism (OCM) to mono- and dimethylated arsenicals (MMA and DMA), facilitating urinary excretion. Hyperhomocysteinemia (HHcys), a marker of impaired OCM, is a risk factor for As-induced skin lesions, but the influences of single nucleotide polymorphisms (SNPs) in OCM genes on Hcys, As metabolism and skin lesion risk is unclear. OBJECTIVES To (i) explore genetic sources of Hcys and the causal role of HHcys in As-induced skin lesion development using OCM genetic proxies for HHcys and (ii) identify OCM SNPs associated with urinary As metabolite proportions and/or skin lesion incidence. METHODS We conducted a case-control study nested in the Health Effects of Arsenic Longitudinal Study (HEALS) in Bangladesh which 876 incident skin lesion cases were matched to controls on sex, age, and follow-up time. We measured serum Hcys, urinary As metabolites, and 26 SNPs in 13 OCM genes. RESULTS Serum Hcys and urinary %DMA were independently associated with increased and decreased odds of skin lesions, respectively. The T allele of MTHFR 677 C ➔ T (rs1801133) was associated with HHcys, higher %MMA, and lower %DMA, but not with skin lesions. Interactions between SNPs and water As on skin lesion risk were suggestive for three variants: the G allele of MTRR rs1801394 and T allele of FOLR1 rs1540087 were associated with lower odds of skin lesions with lower As (≤50 μg/L), and the T allele of TYMS rs1001761 was associated with higher odds of skin lesions with higher As. CONCLUSIONS While HHcys and decreased %DMA were associated with increased risk for skin lesions, and MTHFR 677 C ➔ T was a strong predictor of HHcys, MTHFR 677 C ➔ T was not associated with skin lesion risk. Future studies should explore (i) non-OCM and non-genetic determinants of Hcys and (ii) if genetic findings are replicated in other As-exposed populations, mechanisms by which OCM SNPs may influence the dose-dependent effects of As on skin lesion risk.
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Affiliation(s)
- Megan M Niedzwiecki
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Huiping Zhu
- Department of Pediatrics, University of Texas at Austin Dell Medical School, Austin, TX, USA
| | - Megan N Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Diane Levy
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL, USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Tariqul Islam
- University of Chicago Research Bangladesh, Dhaka, Bangladesh
| | - Alauddin Ahmed
- University of Chicago Research Bangladesh, Dhaka, Bangladesh
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Richard H Finnell
- Department of Pediatrics, University of Texas at Austin Dell Medical School, Austin, TX, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, USA
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
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25
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Dean SG, Zhang C, Gao J, Roy S, Shinkle J, Sabarinathan M, Argos M, Tong L, Ahmed A, Islam MT, Islam T, Rakibuz-Zaman M, Sarwar G, Shahriar H, Rahman M, Yunus M, Graziano JH, Chen LS, Jasmine F, Kibriya MG, Ahsan H, Pierce BL. The association between telomere length and mortality in Bangladesh. Aging (Albany NY) 2018. [PMID: 28630379 PMCID: PMC5509454 DOI: 10.18632/aging.101246] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Telomeres are tandem repeat sequences at the end of chromosomes that bind proteins to protect chromosome ends. Telomeres shorten with age, and shorter leukocyte telomere length (TL) has been associated with overall mortality in numerous studies. However, this association has not been tested in populations outside of Europe and the U.S. We assessed the association between TL and subsequent mortality using data on 744 mortality cases and 761 age-/sex-matched controls sampled from >27,000 participants from three longitudinal Bangladeshi cohorts: Health Effects of Arsenic Longitudinal Study (HEALS), HEALS Expansion (HEALS-E), and Bangladesh Vitamin E and Selenium Trial (BEST). We used conditional logistic regression to estimate odds ratios (ORs) for the association between a standardized TL variable and overall mortality, as well as mortality from chronic diseases, respiratory diseases, circulatory diseases, and cancer. In HEALS and BEST, we observed an association between shorter TL and increased overall mortality (P=0.03 and P=0.03), mortality from chronic disease (P=0.01 and P=0.03) and mortality from circulatory disease (P=0.03 and P=0.04). Results from pooled analyses of all cohorts were consistent with HEALS and BEST. This is the first study demonstrating an association between short TL and increased mortality in a population of non-European ancestry.
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Affiliation(s)
- Samantha G Dean
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Chenan Zhang
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA.,Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Jianjun Gao
- Department of Psychiatry, University of California San Diego, La Jolla, CA 92093, USA
| | - Shantanu Roy
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA.,Current address: Division of Foodborne, Waterborne, and Environmental Diseases, Center for Disease Control, Atlanta, GA 30333, USA
| | - Justin Shinkle
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Mekala Sabarinathan
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Maria Argos
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, Chicago, IL 60637, USA
| | - Lin Tong
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | | | | | | | | | | | | | | | - Md Yunus
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Lin S Chen
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA.,Department of Human Genetics, University of Chicago, Chicago, IL 60615, USA.,Comprehensive Cancer Center, University of Chicago, Chicago, IL 60615, USA.,Department of Medicine, University of Chicago, Chicago, IL 60615, USA
| | - Brandon L Pierce
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, USA.,Department of Human Genetics, University of Chicago, Chicago, IL 60615, USA.,Comprehensive Cancer Center, University of Chicago, Chicago, IL 60615, USA
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26
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Nigra AE, Sanchez TR, Nachman KE, Harvey D, Chillrud SN, Graziano JH, Navas-Acien A. The effect of the Environmental Protection Agency maximum contaminant level on arsenic exposure in the USA from 2003 to 2014: an analysis of the National Health and Nutrition Examination Survey (NHANES). Lancet Public Health 2018; 2:e513-e521. [PMID: 29250608 PMCID: PMC5729579 DOI: 10.1016/s2468-2667(17)30195-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background The current US Environmental Protection Agency (EPA) maximum
contaminant level (MCL) for arsenic in public water systems (10
µg/L) took effect in 2006. Arsenic is not federally regulated in
private wells. The impact of the 2006 MCL on arsenic exposure in the US, as
confirmed through biomarkers, is presently unknown. We evaluated national
trends in water arsenic exposure in the US, hypothesizing that urinary
arsenic levels would decrease over time among participants using public
water systems but not among those using well water. We further estimated the
expected number of avoided lung, bladder, and skin cancer cases. Methods We evaluated 14,127 participants in the National Health and Nutrition
Examination Survey (NHANES) 2003–2014 with urinary dimethylarsinate
(DMA) and total arsenic available. To isolate water exposure, we expanded a
residual-based method to remove tobacco and dietary contributions of
arsenic. We applied EPA risk assessment approaches to estimate the expected
annual number of avoided cancer cases comparing arsenic exposure in
2013–2014 vs. 2003–2004. Findings Among public water users, fully adjusted geometric means (GMs) of DMA
decreased from 3.01 µg/L in 2003–2004 to 2.49 µg/L
in 2013–2014 (17% reduction; 95% confidence interval
10%, 24%; p-trend<0.01); no change was observed
among well water users (p-trend= 0.35). Assuming these estimated exposure
reductions will remain similar across a lifetime, we estimate a reduction of
200 to 900 lung and bladder cancer cases per year depending on the approach
used. Interpretation The decline in urinary arsenic among public water but not private
well users in NHANES 2003–2014 indicates that the implementation of
the current MCL has reduced arsenic exposure in the US population. Our study
supports prior work showing that well water users are inadequately protected
against drinking water arsenic, and confirms the critical role of federal
drinking water regulations in reducing toxic exposures and protecting human
health. Funding This work was supported by the National Institute of Environmental
Health Sciences (1R01ES025216, R01ES021367, 5P30ES009089 and P42ES010349).
A. E. Nigra was supported by 5T32ES007322.
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Affiliation(s)
- Anne E Nigra
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY
| | - Tiffany R Sanchez
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY
| | - Keeve E Nachman
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Johns Hopkins Center for a Livable Future, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.,Johns Hopkins Risk Sciences and Public Policy Institute, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - David Harvey
- Commissioned Corps Officer of the U.S. Public Health Service, Rockville, MD
| | - Steven N Chillrud
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY
| | - Ana Navas-Acien
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY
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27
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Argos M, Tong L, Roy S, Sabarinathan M, Ahmed A, Islam MT, Islam T, Rakibuz-Zaman M, Sarwar G, Shahriar H, Rahman M, Yunus M, Graziano JH, Jasmine F, Kibriya MG, Zhou X, Ahsan H, Pierce BL. Screening for gene-environment (G×E) interaction using omics data from exposed individuals: an application to gene-arsenic interaction. Mamm Genome 2018. [PMID: 29453499 DOI: 10.1007/s00r335-00018-09737-00338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Identifying gene-environment interactions is a central challenge in the quest to understand susceptibility to complex, multi-factorial diseases. Developing an understanding of how inter-individual variability in inherited genetic variation alters the effects of environmental exposures will enhance our knowledge of disease mechanisms and improve our ability to predict disease and target interventions to high-risk sub-populations. Limited progress has been made identifying gene-environment interactions in the epidemiological setting using existing statistical approaches for genome-wide searches for interaction. In this paper, we describe a novel two-step approach using omics data to conduct genome-wide searches for gene-environment interactions. Using existing genome-wide SNP data from a large Bangladeshi cohort study specifically designed to assess the effect of arsenic exposure on health, we evaluated gene-arsenic interactions by first conducting genome-wide searches for SNPs that modify the effect of arsenic on molecular phenotypes (gene expression and DNA methylation features). Using this set of SNPs showing evidence of interaction with arsenic in relation to molecular phenotypes, we then tested SNP-arsenic interactions in relation to skin lesions, a hallmark characteristic of arsenic toxicity. With the emergence of additional omics data in the epidemiologic setting, our approach may have the potential to boost power for genome-wide interaction research, enabling the identification of interactions that will enhance our understanding of disease etiology and our ability to develop interventions targeted at susceptible sub-populations.
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Affiliation(s)
- Maria Argos
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, 1603 West Taylor Street, MC 923, Chicago, IL, 60612, USA.
| | - Lin Tong
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Shantanu Roy
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
- Waterborne Disease Prevention Branch, Division of Foodborne, Waterborne, and Environmental Diseases, Center for Disease Control and Prevention, Atlanta, GA, 30333, USA
| | - Mekala Sabarinathan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | | | | | | | | | | | | | | | - Md Yunus
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, 10032, USA
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Xiang Zhou
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
- Department of Human Genetics, University of Chicago, Chicago, IL, 60637, USA
- Comprehensive Cancer Center, University of Chicago, Chicago, IL, 60637, USA
- Department of Medicine, University of Chicago, Chicago, IL, 60637, USA
| | - Brandon L Pierce
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA.
- Department of Human Genetics, University of Chicago, Chicago, IL, 60637, USA.
- Comprehensive Cancer Center, University of Chicago, Chicago, IL, 60637, USA.
- The University of Chicago, 5841 South Maryland Avenue, Room W264, MC2000, Chicago, IL, 60637, USA.
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28
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Argos M, Tong L, Roy S, Sabarinathan M, Ahmed A, Islam MT, Islam T, Rakibuz-Zaman M, Sarwar G, Shahriar H, Rahman M, Yunus M, Graziano JH, Jasmine F, Kibriya MG, Zhou X, Ahsan H, Pierce BL. Screening for gene-environment (G×E) interaction using omics data from exposed individuals: an application to gene-arsenic interaction. Mamm Genome 2018; 29:101-111. [PMID: 29453499 PMCID: PMC5908479 DOI: 10.1007/s00335-018-9737-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 01/27/2018] [Indexed: 02/02/2023]
Abstract
Identifying gene-environment interactions is a central challenge in the quest to understand susceptibility to complex, multi-factorial diseases. Developing an understanding of how inter-individual variability in inherited genetic variation alters the effects of environmental exposures will enhance our knowledge of disease mechanisms and improve our ability to predict disease and target interventions to high-risk sub-populations. Limited progress has been made identifying gene-environment interactions in the epidemiological setting using existing statistical approaches for genome-wide searches for interaction. In this paper, we describe a novel two-step approach using omics data to conduct genome-wide searches for gene-environment interactions. Using existing genome-wide SNP data from a large Bangladeshi cohort study specifically designed to assess the effect of arsenic exposure on health, we evaluated gene-arsenic interactions by first conducting genome-wide searches for SNPs that modify the effect of arsenic on molecular phenotypes (gene expression and DNA methylation features). Using this set of SNPs showing evidence of interaction with arsenic in relation to molecular phenotypes, we then tested SNP-arsenic interactions in relation to skin lesions, a hallmark characteristic of arsenic toxicity. With the emergence of additional omics data in the epidemiologic setting, our approach may have the potential to boost power for genome-wide interaction research, enabling the identification of interactions that will enhance our understanding of disease etiology and our ability to develop interventions targeted at susceptible sub-populations.
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Affiliation(s)
- Maria Argos
- Division of Epidemiology and Biostatistics, University of Illinois at Chicago, 1603 West Taylor Street, MC 923, Chicago, IL, 60612, USA.
| | - Lin Tong
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Shantanu Roy
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
- Waterborne Disease Prevention Branch, Division of Foodborne, Waterborne, and Environmental Diseases, Center for Disease Control and Prevention, Atlanta, GA, 30333, USA
| | - Mekala Sabarinathan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | | | | | | | | | | | | | | | - Md Yunus
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, 10032, USA
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Muhammad G Kibriya
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
| | - Xiang Zhou
- Department of Biostatistics, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA
- Department of Human Genetics, University of Chicago, Chicago, IL, 60637, USA
- Comprehensive Cancer Center, University of Chicago, Chicago, IL, 60637, USA
- Department of Medicine, University of Chicago, Chicago, IL, 60637, USA
| | - Brandon L Pierce
- Department of Public Health Sciences, University of Chicago, Chicago, IL, 60637, USA.
- Department of Human Genetics, University of Chicago, Chicago, IL, 60637, USA.
- Comprehensive Cancer Center, University of Chicago, Chicago, IL, 60637, USA.
- The University of Chicago, 5841 South Maryland Avenue, Room W264, MC2000, Chicago, IL, 60637, USA.
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29
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Wu F, Chi L, Ru H, Parvez F, Slavkovich V, Eunus M, Ahmed A, Islam T, Rakibuz-Zaman M, Hasan R, Sarwar G, Graziano JH, Ahsan H, Lu K, Chen Y. Arsenic Exposure from Drinking Water and Urinary Metabolomics: Associations and Long-Term Reproducibility in Bangladesh Adults. Environ Health Perspect 2018; 126:017005. [PMID: 29329102 PMCID: PMC6014710 DOI: 10.1289/ehp1992] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 11/24/2017] [Accepted: 11/27/2017] [Indexed: 05/05/2023]
Abstract
BACKGROUND Chronic exposure to inorganic arsenic from drinking water has been associated with a host of cancer and noncancer diseases. The application of metabolomics in epidemiologic studies may allow researchers to identify biomarkers associated with arsenic exposure and its health effects. OBJECTIVE Our goal was to evaluate the long-term reproducibility of urinary metabolites and associations between reproducible metabolites and arsenic exposure. METHODS We studied samples and data from 112 nonsmoking participants (58 men and 54 women) who were free of any major chronic diseases and who were enrolled in the Health Effects of Arsenic Longitudinal Study (HEALS), a large prospective cohort study in Bangladesh. Using a global gas chromatography-mass spectrometry platform, we measured metabolites in their urine samples, which were collected at baseline and again 2 y apart, and estimated intraclass correlation coefficients (ICCs). Linear regression was used to assess the association between arsenic exposure at baseline and metabolite levels in baseline urine samples. RESULTS We identified 2,519 molecular features that were present in all 224 urine samples from the 112 participants, of which 301 had an ICC of ≥0.60. Of the 301 molecular features, water arsenic was significantly related to 31 molecular features and urinary arsenic was significantly related to 74 molecular features after adjusting for multiple comparisons. Six metabolites with a confirmed identity were identified from the 82 molecular features that were significantly associated with either water arsenic or urinary arsenic after adjustment for multiple comparisons. CONCLUSIONS Our study identified urinary metabolites with long-term reproducibility that were associated with arsenic exposure. The data established the feasibility of using metabolomics in future larger studies. https://doi.org/10.1289/EHP1992.
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Affiliation(s)
- Fen Wu
- Department of Population Health, New York University School of Medicine , New York, New York, USA
- Department of Environmental Medicine, New York University School of Medicine , New York, New York, USA
| | - Liang Chi
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Hongyu Ru
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Mahbub Eunus
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | | | - Tariqul Islam
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | | | - Rabiul Hasan
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | - Golam Sarwar
- U-Chicago Research Bangladesh, Ltd., Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Habibul Ahsan
- Department of Health Studies, Center for Cancer Epidemiology and Prevention, University of Chicago, Chicago, Illinois, USA
| | - Kun Lu
- Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Yu Chen
- Department of Population Health, New York University School of Medicine , New York, New York, USA
- Department of Environmental Medicine, New York University School of Medicine , New York, New York, USA
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Shih YH, Islam T, Hore SK, Sarwar G, Shahriar MH, Yunus M, Graziano JH, Harjes J, Baron JA, Parvez F, Ahsan H, Argos M. Associations between prenatal arsenic exposure with adverse pregnancy outcome and child mortality. Environ Res 2017; 158:456-461. [PMID: 28692928 PMCID: PMC5554459 DOI: 10.1016/j.envres.2017.07.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 07/01/2017] [Accepted: 07/03/2017] [Indexed: 05/19/2023]
Abstract
BACKGROUND Chronic arsenic exposure is a public health concern in many parts of the world, with elevated concentrations in groundwater posing a threat to millions of people. Arsenic is associated with various cancers and an array of chronic diseases; however, the relationship with adverse pregnancy outcomes and child mortality is less established. OBJECTIVES We evaluated associations between individual-level prenatal arsenic exposure with adverse pregnancy outcomes and child mortality in a pregnancy study among 498 women nested in a larger population-based cohort in rural Bangladesh. METHODS Creatinine-adjusted urinary total arsenic concentration, a comprehensive measure of exposure from water, food, and air sources, reflective of the prenatal period was available for participants. Self-reported pregnancy outcomes (livebirth, stillbirth, spontaneous/elective abortion) were ascertained. Generalized estimating equations, accounting for multiple pregnancies of participants, were used to estimate odds ratios and 95% confidence intervals in relation to adverse pregnancy outcomes. Vital status of livebirths was subsequently ascertained through November 2015. Cox proportional hazards models were used to estimate hazard ratios and 95% confidence intervals in relation to child mortality. RESULTS We observed a significant association between prenatal arsenic exposure and the risk of stillbirth (greater than median; adjusted OR = 2.50; 95% CI = 1.04, 6.01). We also observed elevated risk of child mortality (greater than median; adjusted HR = 1.92; 95% CI = 0.78, 4.68) in relation to prenatal arsenic exposure. CONCLUSIONS Prospective studies should continue to evaluate prenatal and early life health effects of arsenic exposure and arsenic remediation strategies for women of child-bearing age.
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Affiliation(s)
- Yu-Hsuan Shih
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States
| | | | - Samar Kumar Hore
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | | | | | - Mohammad Yunus
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, United States
| | - Judith Harjes
- BioInformatics Service Center, Section of Biostatistics & Epidemiology, Department of Community & Family Medicine, Dartmouth Medical School, Lebanon, NH 03766, United States
| | - John A Baron
- Department of Medicine, University of North Carolina, Chapel Hill, NC 27599, United States
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, United States
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, Chicago, IL 60637, United States
| | - Maria Argos
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, IL 60612, United States.
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Kibriya MG, Jasmine F, Parvez F, Argos M, Roy S, Paul-Brutus R, Islam T, Ahmed A, Rakibuz-Zaman M, Shinkle J, Slavkovich V, Graziano JH, Ahsan H. Association between genome-wide copy number variation and arsenic-induced skin lesions: a prospective study. Environ Health 2017; 16:75. [PMID: 28720099 PMCID: PMC5516382 DOI: 10.1186/s12940-017-0283-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Exposure to arsenic in drinking water is a global health problem and arsenic-induced skin lesions are hallmark of chronic arsenic toxicity. We and others have reported germline genetic variations as risk factors for such skin lesions. The role of copy number variation (CNV) in the germline DNA in this regard is unknown. METHODS From a large prospectively followed-up cohort, exposed to arsenic, we randomly selected 2171 subjects without arsenic-induced skin lesions at enrollment and genotyped their whole blood DNA samples on Illumina Cyto12v2.1 SNP chips to generate DNA copy number. Participants were followed up every 2 years for a total of 8 years, especially for the development of skin lesions. In Cox regression models, each CNV segment was used as a predictor, accounting for other potential covariates, for incidence of skin lesions. RESULT The presence of genomic deletion(s) in a number of genes (OR5J2, GOLGA6L7P, APBA2, GALNTL5, VN1R31P, PHKG1P2, SGCZ, ZNF658) and lincRNA genes (RP11-76I14.1, CTC-535 M15.2, RP11-73B2.2) were associated with higher risk [HR between 1.67 (CI 1.3-2.1) and 2.15 (CI 1.5-2.9) for different CNVs] for development of skin lesions independent of gender, age, and arsenic exposure. Some deletions had stronger effect in a specific gender (ZNF658 in males, SGCZ in females) and some had stronger effect in higher arsenic exposure (lincRNA CTD-3179P9.1) suggesting a possible gene-environment interaction. CONCLUSION This first genome-wide CNV study in a prospectively followed-up large cohort, exposed to arsenic, suggests that DNA deletion in several genes and lincRNA genes may predispose an individual to a higher risk of development of arsenic-induced skin lesions.
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Affiliation(s)
- Muhammad G. Kibriya
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
| | - Farzana Jasmine
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY USA
| | - Maria Argos
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois, Chicago, IL USA
| | - Shantanu Roy
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
| | - Rachelle Paul-Brutus
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
| | - Tariqul Islam
- University of Chicago Research Bangladesh, Dhaka, Bangladesh
| | - Alauddin Ahmed
- University of Chicago Research Bangladesh, Dhaka, Bangladesh
| | | | - Justin Shinkle
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY USA
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY USA
| | - Habibul Ahsan
- Department of Public Health Sciences, University of Chicago, 900 E 57th Street, KCBD Bldg Room 6110, Chicago, IL 60637 USA
- Department of Medicine, University of Chicago, Chicago, IL USA
- Department of Human Genetics, University of Chicago, Chicago, IL USA
- Cancer Research Center, University of Chicago, Chicago, IL USA
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Negro Silva LF, Lemaire M, Lemarié CA, Plourde D, Bolt AM, Chiavatti C, Bohle DS, Slavkovich V, Graziano JH, Lehoux S, Mann KK. Effects of Inorganic Arsenic, Methylated Arsenicals, and Arsenobetaine on Atherosclerosis in the Mouse Model and the Role of As3mt-Mediated Methylation. Environ Health Perspect 2017; 125:077001. [PMID: 28728140 PMCID: PMC5744679 DOI: 10.1289/ehp806] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 12/21/2016] [Accepted: 12/21/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND Arsenic is metabolized through a series of oxidative methylation reactions by arsenic (3) methyltransferase (As3MT) to yield methylated intermediates. Although arsenic exposure is known to increase the risk of atherosclerosis, the contribution of arsenic methylation and As3MT remains undefined. OBJECTIVES Our objective was to define whether methylated arsenic intermediates were proatherogenic and whether arsenic biotransformation by As3MT was required for arsenic-enhanced atherosclerosis. METHODS We utilized the apoE−/− mouse model to compare atherosclerotic plaque size and composition after inorganic arsenic, methylated arsenical, or arsenobetaine exposure in drinking water. We also generated apoE−/−/As3mt−/− double knockout mice to test whether As3MT-mediated biotransformation was required for the proatherogenic effects of inorganic arsenite. Furthermore, As3MT expression and function were assessed in in vitro cultures of plaque-resident cells. Finally, bone marrow transplantation studies were performed to define the contribution of As3MT-mediated methylation in different cell types to the development of atherosclerosis after inorganic arsenic exposure. RESULTS We found that methylated arsenicals, but not arsenobetaine, are proatherogenic and that As3MT is required for arsenic to induce reactive oxygen species and promote atherosclerosis. Importantly, As3MT was expressed and functional in multiple plaque-resident cell types, and transplant studies indicated that As3MT is required in extrahepatic tissues to promote atherosclerosis. CONCLUSION Taken together, our findings indicate that As3MT acts to promote cardiovascular toxicity of arsenic and suggest that human AS3MT SNPs that correlate with enzyme function could predict those most at risk to develop atherosclerosis among the millions that are exposed to arsenic. https://doi.org/10.1289/EHP806.
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Affiliation(s)
| | - Maryse Lemaire
- Lady Davis Institute for Medical Research
- Department of Oncology
| | | | | | - Alicia M Bolt
- Lady Davis Institute for Medical Research
- Department of Oncology
| | | | - D Scott Bohle
- Department of Chemistry, McGill University, Montréal, Québec, Canada
| | - Vesna Slavkovich
- Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Joseph H Graziano
- Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Stéphanie Lehoux
- Lady Davis Institute for Medical Research
- Division of Experimental Medicine
- Department of Medicine, and
| | - Koren K Mann
- Lady Davis Institute for Medical Research
- Division of Experimental Medicine
- Department of Oncology
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Parvez F, Medina S, Santella RM, Islam T, Lauer FT, Alam N, Eunus M, Rahman M, Factor-Litvak P, Ahsan H, Graziano JH, Liu KJ, Burchiel SW. Arsenic exposures alter clinical indicators of anemia in a male population of smokers and non-smokers in Bangladesh. Toxicol Appl Pharmacol 2017; 331:62-68. [PMID: 28526635 DOI: 10.1016/j.taap.2017.05.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/13/2017] [Accepted: 05/15/2017] [Indexed: 12/28/2022]
Abstract
Drinking water arsenic (WAs) exposure has been linked to a number of detrimental health outcomes including anemia, primarily among pregnant women. Little is known about the effects of arsenic (As) on hematological disorders among men. We have examined the role of As exposure on hematological indicators of anemia in a group of men exposed to a wide range of As in their drinking water. We conducted a cross-sectional investigation among 119 healthy men in the Health Effects of As Longitudinal Study (HEALS) cohort, in rural Bangladesh. The participants are part of an ongoing study focused on evaluating the influence of As and smoking on immune function. Samples were collected at recruitment and analyzed for water As, urinary As (UAs) and UAs metabolites to assess As exposure. Blood samples were also collected at recruitment and assayed immediately for hematological parameters. We found that increased WAs levels were associated with decreased red blood cell counts [β=-0.13, p<0.0001] as well as hematocrit packed cell volumes [β=-0.68, p=0.008] following adjustment for age, smoking, body mass index and polycyclic aromatic hydrocarbon-DNA adducts. Other measures of As exposure (UAs and its metabolites) demonstrated similar associations. Slightly stronger effects were observed among smokers. We also observed an effect of As on hemoglobin among smokers in relation to UAs [β=-0.54, p<0.05]. Our analysis revealed effects of As exposure on hematological indicators of anemia in a group of healthy male smokers and non-smokers.
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Affiliation(s)
- Faruque Parvez
- Mailman University School of Public Health, Department of Environmental Health, Columbia University, New York, NY 10032, United States
| | - Sebastian Medina
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Regina M Santella
- Mailman University School of Public Health, Department of Environmental Health, Columbia University, New York, NY 10032, United States
| | - Tariqul Islam
- University of Chicago Field Research Office, Dhaka 1230, Bangladesh
| | - Fredine T Lauer
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Nur Alam
- University of Chicago Field Research Office, Dhaka 1230, Bangladesh
| | - Mahbubul Eunus
- University of Chicago Field Research Office, Dhaka 1230, Bangladesh
| | - Mizanour Rahman
- University of Chicago Field Research Office, Dhaka 1230, Bangladesh
| | - Pam Factor-Litvak
- Mailman University School of Public Health, Department of Environmental Health, Columbia University, New York, NY 10032, United States
| | - Habib Ahsan
- University of Chicago, Division of Public Health, Chicago, IL 60637, United States
| | - Joseph H Graziano
- Mailman University School of Public Health, Department of Environmental Health, Columbia University, New York, NY 10032, United States
| | - Ke Jian Liu
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States
| | - Scott W Burchiel
- The University of New Mexico College of Pharmacy, Department of Pharmaceutical Sciences, Albuquerque, NM 87131, United States.
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Howe CG, Liu X, Hall MN, Ilievski V, Caudill MA, Malysheva O, Lomax-Luu AM, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Costa M, Gamble MV. Sex-Specific Associations between One-Carbon Metabolism Indices and Posttranslational Histone Modifications in Arsenic-Exposed Bangladeshi Adults. Cancer Epidemiol Biomarkers Prev 2016; 26:261-269. [PMID: 27765800 DOI: 10.1158/1055-9965.epi-16-0202] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 09/09/2016] [Accepted: 10/10/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Posttranslational histone modifications (PTHMs) are altered by arsenic, an environmental carcinogen. PTHMs are also influenced by nutritional methyl donors involved in one-carbon metabolism (OCM), which may protect against epigenetic dysregulation. METHODS We measured global levels of three PTHMs, which are dysregulated in cancers (H3K36me2, H3K36me3, H3K79me2), in peripheral blood mononuclear cells (PBMC) from 324 participants enrolled in the Folic Acid and Creatine Trial, a randomized trial in arsenic-exposed Bangladeshi adults. Sex-specific associations between several blood OCM indices (folate, vitamin B12, choline, betaine, homocysteine) and PTHMs were examined at baseline using regression models, adjusted for multiple tests by controlling for the false discovery rate (PFDR). We also evaluated the effects of folic acid supplementation (400 μg/d for 12 weeks), compared with placebo, on PTHMs. RESULTS Associations between choline and H3K36me2 and between vitamin B12 and H3K79me2 differed significantly by sex (Pdiff < 0.01 and <0.05, respectively). Among men, plasma choline was positively associated with H3K36me2 (PFDR < 0.05), and among women, plasma vitamin B12 was positively associated with H3K79me2 (PFDR < 0.01). Folic acid supplementation did not alter any of the PTHMs examined (PFDR = 0.80). CONCLUSIONS OCM indices may influence PTHMs in a sex-dependent manner, and folic acid supplementation, at this dose and duration, does not alter PTHMs in PBMCs. IMPACT This is the first study to examine the influences of OCM indices on PTHMs in a population that may have increased susceptibility to cancer development due to widespread exposure to arsenic-contaminated drinking water and a high prevalence of hyperhomocysteinemia. Cancer Epidemiol Biomarkers Prev; 26(2); 261-9. ©2016 AACR.
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Affiliation(s)
- Caitlin G Howe
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, New York
| | - Megan N Hall
- Department of Epidemiology, Mailman School of Public Health, New York
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
| | - Marie A Caudill
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Olga Malysheva
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Angela M Lomax-Luu
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
| | - Max Costa
- Department of Environmental Medicine, NYU Langone Medical Center, New York University, New York
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, New York
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Sanchez TR, Levy D, Shahriar MH, Uddin MN, Siddique AB, Graziano JH, Lomax-Luu A, van Geen A, Gamble MV. Provision of well-water treatment units to 600 households in Bangladesh: A longitudinal analysis of urinary arsenic indicates fading utility. Sci Total Environ 2016; 563-564:131-7. [PMID: 27135575 PMCID: PMC4907796 DOI: 10.1016/j.scitotenv.2016.04.112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/15/2016] [Accepted: 04/16/2016] [Indexed: 05/22/2023]
Abstract
BACKGROUND Millions of villagers in Bangladesh remain exposed to high levels of arsenic (As) from drinking untreated well-water even though the scale of the problem was recognized 15years ago. Water treatment at the household-level has been promoted as a viable complement but few longitudinal studies of their efficacy using an objective measure of exposure have been conducted. Participants (N=622) of a nutrition trial in Araihazar, Bangladesh were each provided with READ-F filters at the beginning of the study and encouraged to use them over the 6month duration of the intervention. Well-water As, treated water As, and urinary As were monitored periodically during the trial and measured again one year after the trial ended. RESULTS The READ-F filters were initially well received and median urinary As levels for participants declined from 117μg/L to 51μg/L within a single week. However, median urinary As levels gradually rose back to 126μg/L by the end of the trial. Fifty filters were replaced over the course of the trial because of insufficient As removal or reduced flow. With these exceptions, most of the treated water met the WHO guideline for As in drinking water of 10μg/L. One year after the nutritional trial ended, 95% of participants had abandoned their filter citing inconvenience as the primary reason. At that time, median urinary As levels for 10 participants who had switched to a nearby low-As well had declined to 63μg/L. CONCLUSIONS Participants were probably no longer using the READ-F filter long before the 6month nutritional intervention ended despite claiming that they were using them. Household-level treatment is likely to continue to play a minor role in the effort to reduce As exposure in Bangladesh. Understanding the limitations of such expensive interventions is important for future policy regarding As mitigation.
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Affiliation(s)
- Tiffany R Sanchez
- Department of Environmental Health Sciences, Columbia University, 722 West 168th St. Floor 11, New York, NY 10032, United States.
| | - Diane Levy
- Department of Biostatistics, Columbia University, 722 West 168th St. Floor 8, New York, NY 10032, United States.
| | | | | | - Abu B Siddique
- Columbia University Bangladesh Research Project, Dhaka, Bangladesh.
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Columbia University, 722 West 168th St. Floor 11, New York, NY 10032, United States.
| | - Angela Lomax-Luu
- Department of Environmental Health Sciences, Columbia University, 722 West 168th St. Floor 11, New York, NY 10032, United States.
| | - Alexander van Geen
- Department of Geochemistry, Lamont-Doherty Earth Observatory, 131 Comer. 61 Route 9W, PO Box 1000, Palisades, NY 10964, United States.
| | - Mary V Gamble
- Department of Environmental Health Sciences, Columbia University, 722 West 168th St. Floor 11, New York, NY 10032, United States.
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Howe CG, Liu X, Hall MN, Slavkovich V, Ilievski V, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Costa M, Gamble MV. Associations between Blood and Urine Arsenic Concentrations and Global Levels of Post-Translational Histone Modifications in Bangladeshi Men and Women. Environ Health Perspect 2016; 124:1234-40. [PMID: 26967670 PMCID: PMC4977054 DOI: 10.1289/ehp.1510412] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 10/21/2015] [Accepted: 02/22/2016] [Indexed: 05/23/2023]
Abstract
BACKGROUND Exposure to inorganic arsenic is associated with numerous adverse health outcomes, with susceptibility differing by sex. Although evidence from in vitro studies suggests that arsenic alters post-translational histone modifications (PTHMs), evidence in humans is limited. OBJECTIVES The objectives were to determine: a) if arsenic exposure is associated with global (percent) levels of PTHMs H3K36me2, H3K36me3, and H3K79me2 in a sex-dependent manner, and b) if %PTHMs are stable when arsenic exposure is reduced. METHODS We examined associations between arsenic, measured in blood and urine, and %PTHMs in peripheral blood mononuclear cells from 317 participants enrolled in the Bangladesh Folic Acid and Creatine Trial (FACT). We also examined the stability of %PTHMs after the use of arsenic-removal water filters (n = 60). RESULTS Associations between natural log-transformed (ln) urinary arsenic, adjusted for creatinine (uAsCr), and %H3K36me2 differed significantly between men and women (p = 0.01). ln(uAsCr) was positively associated with %H3K36me2 in men [β = 0.12; 95% confidence interval (CI): 0.01, 0.23, p = 0.03] but was negatively associated with %H3K36me2 in women (β = -0.05; 95% CI: -0.12, 0.02, p = 0.19). The patterns of associations with blood arsenic were similar. On average, water filter use was also associated with reductions in %H3K36me2 (p < 0.01), but this did not differ significantly by sex. Arsenic was not significantly associated with %H3K36me3 or %H3K79me2 in men or women. CONCLUSIONS Arsenic exposure was associated with %H3K36me2 in a sex-specific manner but was not associated with %H3K36me3 or %H3K79me2. Additional studies are needed to assess changes in %H3K36me2 after arsenic removal. CITATION Howe CG, Liu X, Hall MN, Slavkovich V, Ilievski V, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Costa M, Gamble MV. 2016. Associations between blood and urine arsenic concentrations and global levels of post-translational histone modifications in Bangladeshi men and women. Environ Health Perspect 124:1234-1240; http://dx.doi.org/10.1289/ehp.1510412.
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Affiliation(s)
| | | | - Megan N. Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | | | | | | | - Abu B. Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N. Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | | | - Max Costa
- Department of Environmental Medicine, Langone Medical Center, New York University, New York, New York, USA
| | - Mary V. Gamble
- Department of Environmental Health Sciences,
- Address correspondence to M.V. Gamble, Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, 11th Floor, 722 W. 168th St., New York, NY 10032 USA. Telephone: (212) 305-7949. E-mail:
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Wasserman GA, Liu X, Parvez F, Factor-Litvak P, Kline J, Siddique AB, Shahriar H, Uddin MN, van Geen A, Mey JL, Balac O, Graziano JH. Child Intelligence and Reductions in Water Arsenic and Manganese: A Two-Year Follow-up Study in Bangladesh. Environ Health Perspect 2016; 124:1114-20. [PMID: 26713676 PMCID: PMC4937860 DOI: 10.1289/ehp.1509974] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 12/11/2015] [Indexed: 05/20/2023]
Abstract
BACKGROUND Arsenic (As) exposure from drinking water is associated with modest intellectual deficits in childhood. It is not known whether reducing exposure is associated with improved intelligence. OBJECTIVE We aimed to determine whether reducing As exposure is associated with improved child intellectual outcomes. METHODS Three hundred three 10-year-old children drinking from household wells with a wide range of As concentrations were enrolled at baseline. In the subsequent year, deep community wells, low in As, were installed in villages of children whose original wells had high water As (WAs ≥ 50 μg/L). For 296 children, intelligence was assessed by WISC-IV (Wechsler Intelligence Scale for Children, 4th ed.), with a version modified for the study population, at baseline and approximately 2 years later; analyses considered standardized scores for both Full Scale IQ and Verbal Comprehension, Perceptual Reasoning, Working Memory, and Processing Speed Indices. Creatinine-adjusted urinary arsenic (UAs/Cr), blood As (BAs), and blood manganese (BMn) were assessed at both times. RESULTS UAs/Cr concentrations declined significantly by follow-up for both the high (≥ 50 μg/L) and low (< 50 μg/L) WAs subgroups. At baseline, adjusting for maternal age and intelligence, plasma ferritin, head circumference, home environment quality, school grade, and BMn, UAs/Cr was significantly negatively associated with Full Scale IQ, and with all Index scores (except Processing Speed). After adjustment for baseline Working Memory scores and school grade, each 100-μg/g reduction in UAs/Cr from baseline to follow-up was associated with a 0.91 point increase in Working Memory (95% CI: 0.14, 1.67). The change in UAs/Cr across follow-up was not significantly associated with changes in Full Scale IQ or Index scores. CONCLUSIONS Installation of deep, low-As community wells lowered UAs, BAs, and BMn. A greater decrease in UAs/Cr was associated with greater improvements in Working Memory scores, but not with a greater improvement in Full Scale IQ. CITATION Wasserman GA, Liu X, Parvez F, Factor-Litvak P, Kline J, Siddique AB, Shahriar H, Uddin MN, van Geen A, Mey JL, Balac O, Graziano JH. 2016. Child intelligence and reductions in water arsenic and manganese: a two-year follow-up study in Bangladesh. Environ Health Perspect 124:1114-1120; http://dx.doi.org/10.1289/ehp.1509974.
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Affiliation(s)
- Gail A. Wasserman
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, New York, USA
- New York State Psychiatric Institute, New York, New York, USA
- Address correspondence to G.A. Wasserman, NYS Psychiatric Institute, 1051 Riverside Dr., Unit 78, New York, NY 10032 USA. Telephone: (646) 774-5759. E-mail:
| | | | | | - Pam Factor-Litvak
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York, USA
| | - Jennie Kline
- New York State Psychiatric Institute, New York, New York, USA
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York, USA
| | - Abu B. Siddique
- Columbia University Arsenic Project Office, Mohakhali, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project Office, Mohakhali, Dhaka, Bangladesh
| | | | - Alexander van Geen
- Lamont-Doherty Earth Observatory, Columbia University, New York, New York, USA
| | - Jacob L. Mey
- Lamont-Doherty Earth Observatory, Columbia University, New York, New York, USA
| | - Olgica Balac
- Department of Environmental Health Sciences, and
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Hall MN, Howe CG, Liu X, Caudill MA, Malysheva O, Ilievski V, Lomax-Luu AM, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Graziano JH, Gamble MV. Supplementation with Folic Acid, but Not Creatine, Increases Plasma Betaine, Decreases Plasma Dimethylglycine, and Prevents a Decrease in Plasma Choline in Arsenic-Exposed Bangladeshi Adults. J Nutr 2016; 146:1062-7. [PMID: 27052531 PMCID: PMC4841924 DOI: 10.3945/jn.115.227132] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/24/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Folic acid (FA) supplementation facilitates urinary excretion of arsenic, a human carcinogen. A better understanding of interactions between one-carbon metabolism intermediates may improve the ability to design nutrition interventions that further facilitate arsenic excretion. OBJECTIVE The objective was to determine if FA and/or creatine supplementation increase choline and betaine and decrease dimethylglycine (DMG). METHODS We conducted a secondary analysis of the Folic Acid and Creatine Trial, a randomized trial in arsenic-exposed Bangladeshi adults (n = 605, aged 24-55 y, 50.3% male) who received arsenic-removal water filters. We examined treatment effects of FA and/or creatine supplementation on plasma choline, betaine, and DMG concentrations, measured by LC-tandem mass spectrometry at baseline and at week 12. Group comparisons were between 1) 400 and 800 μg FA/d (FA400 and FA800, respectively) compared with placebo, 2) creatine (3 g/d) compared with placebo, and 3) creatine plus FA400 compared with FA400. RESULTS Choline decreased in the placebo group (-6.6%; 95% CI: -10.2%, -2.9%) but did not change in the FA groups (FA400: 2.5%; 95% CI: -0.9%, 6.1%; FA800: 1.4%; 95% CI: -2.5%, 5.5%; P < 0.05). Betaine did not change in the placebo group (-3.5%; 95% CI: -9.3%, 2.6%) but increased in the FA groups (FA400: 14.1%; 95% CI: 9.4%, 19.0%; FA800: 13.0%; 95% CI: 7.2%, 19.1%; P < 0.01). The decrease in DMG was greater in the FA groups (FA400: -26.7%; 95% CI: -30.9%, -22.2%; FA800: -27.8%; 95% CI: -31.8%, -23.4%) than in the placebo group (-12.3%; 95% CI: -18.1%, -6.2%; P < 0.01). The percentage change in choline, betaine, and DMG did not differ between creatine treatment arms and their respective reference groups. CONCLUSION Supplementation for 12 wk with FA, but not creatine, increases plasma betaine, decreases plasma DMG, and prevents a decrease in plasma choline in arsenic-exposed Bangladeshi adults. This trial was registered at clinicaltrials.gov as NCT01050556.
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Affiliation(s)
| | | | - Xinhua Liu
- Biostatistics, Mailman School of Public Health, Columbia University, New York, NY
| | - Marie A Caudill
- Division of Nutritional Sciences, Cornell University, Ithaca, NY; and
| | - Olga Malysheva
- Division of Nutritional Sciences, Cornell University, Ithaca, NY; and
| | | | | | | | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Mohammad N Uddin
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
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Sanchez TR, Perzanowski M, Graziano JH. Inorganic arsenic and respiratory health, from early life exposure to sex-specific effects: A systematic review. Environ Res 2016; 147:537-55. [PMID: 26891939 PMCID: PMC4821752 DOI: 10.1016/j.envres.2016.02.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 05/04/2023]
Abstract
This systematic review synthesizes the diverse body of epidemiologic research accrued on inorganic arsenic exposure and respiratory health effects. Twenty-nine articles were identified that examined the relationship between inorganic arsenic exposure and respiratory outcomes (i.e. lung function, symptoms, acute respiratory infections, chronic non-malignant lung diseases, and non-malignant lung disease mortality). There was strong evidence of a general association between arsenic and non-malignant respiratory illness, including consistent evidence on lung function impairment, acute respiratory tract infections, respiratory symptoms, and non-malignant lung disease mortality. Overall, early life exposure (i.e. in utero and/or early-childhood) had a marked effect throughout the lifespan. This review also identified some research gaps, including limited evidence at lower levels of exposure (water arsenic <100μg/L), mixed evidence of sex differences, and some uncertainty on arsenic and any single non-malignant respiratory disease or pathological process. Common limitations, including potential publication bias; non-comparability of outcome measures across included articles; incomplete exposure histories; and limited confounder control attenuated the cumulative strength of the evidence as it relates to US populations. This systematic review provides a comprehensive assessment of the epidemiologic evidence and should be used to guide future research on arsenic's detrimental effects on respiratory health.
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Affiliation(s)
- Tiffany R Sanchez
- Department of Environmental Health Sciences, Columbia University, 722 West 168th Street, New York, NY 10032, USA.
| | - Matthew Perzanowski
- Department of Environmental Health Sciences, Columbia University, 722 West 168th Street, New York, NY 10032, USA.
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Columbia University, 722 West 168th Street, New York, NY 10032, USA.
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Bailey KA, Smith AH, Tokar EJ, Graziano JH, Kim KW, Navasumrit P, Ruchirawat M, Thiantanawat A, Suk WA, Fry RC. Mechanisms Underlying Latent Disease Risk Associated with Early-Life Arsenic Exposure: Current Research Trends and Scientific Gaps. Environ Health Perspect 2016; 124:170-5. [PMID: 26115410 PMCID: PMC4749078 DOI: 10.1289/ehp.1409360] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 06/23/2015] [Indexed: 05/04/2023]
Abstract
BACKGROUND Millions of individuals worldwide, particularly those living in rural and developing areas, are exposed to harmful levels of inorganic arsenic (iAs) in their drinking water. Inorganic As exposure during key developmental periods is associated with a variety of adverse health effects, including those that are evident in adulthood. There is considerable interest in identifying the molecular mechanisms that relate early-life iAs exposure to the development of these latent diseases, particularly in relationship to cancer. OBJECTIVES This work summarizes research on the molecular mechanisms that underlie the increased risk of cancer development in adulthood that is associated with early-life iAs exposure. DISCUSSION Epigenetic reprogramming that imparts functional changes in gene expression, the development of cancer stem cells, and immunomodulation are plausible underlying mechanisms by which early-life iAs exposure elicits latent carcinogenic effects. CONCLUSIONS Evidence is mounting that relates early-life iAs exposure and cancer development later in life. Future research should include animal studies that address mechanistic hypotheses and studies of human populations that integrate early-life exposure, molecular alterations, and latent disease outcomes.
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Affiliation(s)
- Kathryn A. Bailey
- Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, Chapel Hill, North Carolina, USA
| | - Allan H. Smith
- Arsenic Health Effects Research Program, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Erik J. Tokar
- National Toxicology Program, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, North Carolina, USA
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, New York, USA
| | - Kyoung-Woong Kim
- School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Panida Navasumrit
- Laboratory of Environmental Toxicology, Chulabhorn Research Institute, Bangkok, Thailand
| | - Mathuros Ruchirawat
- Laboratory of Environmental Toxicology, Chulabhorn Research Institute, Bangkok, Thailand
| | - Apinya Thiantanawat
- Laboratory of Environmental Toxicology, Chulabhorn Research Institute, Bangkok, Thailand
| | - William A. Suk
- Superfund Research Program, NIEHS, NIH, DHHS, Research Triangle Park, North Carolina, USA
| | - Rebecca C. Fry
- Department of Environmental Sciences and Engineering, UNC Gillings School of Global Public Health, Chapel Hill, North Carolina, USA
- Address correspondence to R.C. Fry, Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, 135 Dauer Dr., CB 7431, University of North Carolina, Chapel Hill, NC 27599-7295 USA. Telephone: (919) 843-6864. E-mail:
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Kleiman NJ, Quinn AM, Fields KG, Slavkovich V, Graziano JH. Arsenite accumulation in the mouse eye. J Toxicol Environ Health A 2016; 79:339-341. [PMID: 27267701 PMCID: PMC4982701 DOI: 10.1080/15287394.2016.1151392] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 02/03/2016] [Indexed: 05/29/2023]
Abstract
Elevated arsenic (As) concentrations in drinking water are a major worldwide public health concern. Exposure to As is associated with carcinogenesis, skin lesions, cardiovascular disease, cognitive deficits, and other disorders. However, little is known regarding chronic As-mediated effects on the eye. Oxidative stress is believed to be an important factor in As-related pathology and is also implicated in certain eye diseases such as cataract. Thus, elevated exposure to arsenic could potentially be a contributing factor for ocular pathology. A pilot study was therefore initiated to determine whether As could be detected in eye tissue of mice exposed to sodium arsenite in drinking water. Total As concentrations were determined by inductively coupled plasma-mass spectroscopy in whole eyes, lens, liver, heart, lung, kidneys, spleen, brain, and hair from mice given 0, 10, 50, or 250 ppm sodium arsenite in their drinking water for 4 wk or 0, 10 or 50 ppm for 6 mo. Dose-dependent increases in As concentration were observed in all organs and tissues. Surprisingly, As concentrations in the eye and lens were significantly higher than those in liver, lung, heart, spleen, and brain and similar to that found in kidneys. The relatively high concentration in the eye, and the lens in particular, suggests As exposure may be a contributing factor in cataract formation in parts of the world where As in drinking water is endemic.
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Affiliation(s)
- Norman J. Kleiman
- Department of Environmental Health Sciences, Columbia University, Mailman School of Public Health, New York, NY 10032
| | - Adrienne M. Quinn
- Keck School of Medicine of the University of Southern California, Los Angeles, CA 90033
| | - Kara G. Fields
- Healthcare Research Institute, Hospital for Special Surgery, New York, NY 10021
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Columbia University, Mailman School of Public Health, New York, NY 10032
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Columbia University, Mailman School of Public Health, New York, NY 10032
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Jansen RJ, Argos M, Tong L, Li J, Rakibuz-Zaman M, Islam MT, Slavkovich V, Ahmed A, Navas-Acien A, Parvez F, Chen Y, Gamble MV, Graziano JH, Pierce BL, Ahsan H. Determinants and Consequences of Arsenic Metabolism Efficiency among 4,794 Individuals: Demographics, Lifestyle, Genetics, and Toxicity. Cancer Epidemiol Biomarkers Prev 2015; 25:381-90. [PMID: 26677206 DOI: 10.1158/1055-9965.epi-15-0718] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/18/2015] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Exposure to inorganic arsenic (iAs), a class I carcinogen, affects several hundred million people worldwide. Once absorbed, iAs is converted to monomethylated (MMA) and then dimethylated forms (DMA), with methylation facilitating urinary excretion. The abundance of each species in urine relative to their sum (iAs%, MMA%, and DMA%) varies across individuals, reflecting differences in arsenic metabolism capacity. METHODS The association of arsenic metabolism phenotypes with participant characteristics and arsenical skin lesions was characterized among 4,794 participants in the Health Effects of Arsenic Longitudinal Study (Araihazar, Bangladesh). Metabolism phenotypes include those obtained from principal component (PC) analysis of arsenic species. RESULTS Two independent PCs were identified: PC1 appears to represent capacity to produce DMA (second methylation step), and PC2 appears to represent capacity to convert iAs to MMA (first methylation step). PC1 was positively associated (P <0.05) with age, female sex, and BMI, while negatively associated with smoking, arsenic exposure, education, and land ownership. PC2 was positively associated with age and education but negatively associated with female sex and BMI. PC2 was positively associated with skin lesion status, while PC1 was not. 10q24.32/AS3MT region polymorphisms were strongly associated with PC1, but not PC2. Patterns of association for most variables were similar for PC1 and DMA%, and for PC2 and MMA% with the exception of arsenic exposure and SNP associations. CONCLUSIONS Two distinct arsenic metabolism phenotypes show unique associations with age, sex, BMI, 10q24.32 polymorphisms, and skin lesions. IMPACT This work enhances our understanding of arsenic metabolism kinetics and toxicity risk profiles.
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Affiliation(s)
- Rick J Jansen
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois
| | - Maria Argos
- Divison of Epidemiology and Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, Illinois
| | - Lin Tong
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois
| | - Jiabei Li
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois
| | | | | | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | | | - Ana Navas-Acien
- Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Yu Chen
- Departments of Population Health and Environmental Medicine, New York University School of Medicine, New York, New York
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Brandon L Pierce
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois. Department of Human Genetics and Comprehensive Cancer Center, The University of Chicago, Chicago, Illinois.
| | - Habibul Ahsan
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois. Department of Human Genetics and Comprehensive Cancer Center, The University of Chicago, Chicago, Illinois. Department of Medicine, The University of Chicago, Chicago, Illinois.
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43
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Khan K, Ahmed E, Factor-Litvak P, Liu X, Siddique AB, Wasserman GA, Slavkovich V, Levy D, Mey JL, van Geen A, Graziano JH. Evaluation of an Elementary School-based Educational Intervention for Reducing Arsenic Exposure in Bangladesh. Environ Health Perspect 2015; 123:1331-1336. [PMID: 25956010 PMCID: PMC4671245 DOI: 10.1289/ehp.1409462] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 05/06/2015] [Indexed: 05/29/2023]
Abstract
BACKGROUND Chronic exposure to well water arsenic (As) remains a major rural health challenge in Bangladesh and some other developing countries. Many mitigation programs have been implemented to reduce As exposure, although evaluation studies for these efforts are rare in the literature. OBJECTIVES In this study we estimated associations between a school-based intervention and various outcome measures of As mitigation. METHODS We recruited 840 children from 14 elementary schools in Araihazar, Bangladesh. Teachers from 7 schools were trained on an As education curriculum, whereas the remaining 7 schools without any training formed the control group. Surveys, knowledge tests, and well-water testing were conducted on 773 children both at baseline and postintervention follow-up. Urine samples were collected from 210 children from 4 intervention schools and the same number of children from 4 control schools. One low-As (< 10 μg/L) community well in each study village was ensured during an 18-month intervention period. RESULTS After adjustment for the availability of low-As wells and other sociodemographic confounders, children receiving the intervention were five times more likely to switch from high- to low-As wells (p < 0.001). We also observed a significant decline of urinary arsenic (UAs) (p = < 0.001) (estimated β = -214.9; 95% CI: -301.1, -128.7 μg/g creatinine) among the children who were initially drinking from high-As wells (> Bangladesh standard of 50 μg/L) and significantly improved As knowledge attributable to the intervention after controlling for potential confounders. CONCLUSIONS These findings offer strong evidence that school-based intervention can effectively reduce As exposure in Bangladesh by motivating teachers, children, and parents.
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Affiliation(s)
- Khalid Khan
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, New York, USA
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Peters BA, Hall MN, Liu X, Parvez F, Sanchez TR, van Geen A, Mey JL, Siddique AB, Shahriar H, Uddin MN, Islam T, Balac O, Ilievski V, Factor-Litvak P, Graziano JH, Gamble MV. Folic Acid and Creatine as Therapeutic Approaches to Lower Blood Arsenic: A Randomized Controlled Trial. Environ Health Perspect 2015; 123:1294-301. [PMID: 25978852 PMCID: PMC4671237 DOI: 10.1289/ehp.1409396] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 05/12/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND The World Health Organization estimates that > 140 million people worldwide are exposed to arsenic (As)-contaminated drinking water. As undergoes biologic methylation, which facilitates renal As elimination. In folate-deficient individuals, this process is augmented by folic acid (FA) supplementation, thereby lowering blood As (bAs). Creatinine concentrations in urine are a robust predictor of As methylation patterns. Although the reasons for this are unclear, creatine synthesis is a major consumer of methyl donors, and this synthesis is down-regulated by dietary/supplemental creatine. OBJECTIVES Our aim was to determine whether 400 or 800 μg FA and/or creatine supplementation lowers bAs in an As-exposed Bangladeshi population. METHODS We conducted a clinical trial in which 622 participants were randomized to receive 400 μg FA, 800 μg FA, 3 g creatine, 3 g creatine+400 μg FA, or placebo daily. All participants received an As-removal filter on enrollment, and were followed for 24 weeks. After the 12th week, half of the two FA groups were switched to placebo to evaluate post-treatment bAs patterns. RESULTS Linear models with repeated measures indicated that the decline in ln(bAs) from baseline in the 800-μg FA group exceeded that of the placebo group (weeks 1-12: β= -0.09, 95% CI: -0.18, -0.01; weeks 13-24: FA continued: β= -0.12, 95% CI: -0.24, -0.00; FA switched to placebo: β= -0.14, 95% CI: -0.26, -0.02). There was no rebound in bAs related to cessation of FA supplementation. Declines in bAs observed in the remaining treatment arms were not significantly different from those of the placebo group. CONCLUSIONS In this mixed folate-deficient/replete study population, 12- and 24-week treatment with 800 μg (but not 400 μg) FA lowered bAs to a greater extent than placebo; this was sustained 12 weeks after FA cessation. In future studies, we will evaluate whether FA and/or creatine altered As methylation profiles.
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Affiliation(s)
- Brandilyn A Peters
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA
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Peters BA, Hall MN, Liu X, Slavkovich V, Ilievski V, Alam S, Siddique AB, Islam T, Graziano JH, Gamble MV. Renal function is associated with indicators of arsenic methylation capacity in Bangladeshi adults. Environ Res 2015; 143:123-30. [PMID: 26476787 PMCID: PMC4740972 DOI: 10.1016/j.envres.2015.10.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 05/19/2023]
Abstract
BACKGROUND Arsenic (As) methylation capacity in epidemiologic studies is typically indicated by the proportions of inorganic As (%InAs), monomethylarsonic acid (%MMA), and dimethylarsinic acid (%DMA) in urine as a fraction of total urinary As. The relationship between renal function and indicators of As methylation capacity has not been thoroughly investigated. OBJECTIVES Our two aims were to examine (1) associations between estimated glomerular filtration rate (eGFR) and %As metabolites in blood and urine, and (2) whether renal function modifies the relationship of blood %As metabolites with respective urinary %As metabolites. METHODS In a cross-sectional study of 375 As-exposed Bangladeshi adults, we measured blood and urinary As metabolites, and calculated eGFR from plasma cystatin C. RESULTS In covariate-adjusted linear models, a 1 ml/min/1.73 m(2) increase in eGFR was associated with a 0.39% increase in urinary %InAs (p<0.0001) and a mean decrease in urinary %DMA of 0.07 (p=0.0005). In the 292 participants with measurable blood As metabolites, the associations of eGFR with increased blood %InAs and decreased blood %DMA did not reach statistical significance. eGFR was not associated with urinary or blood %MMA in covariate-adjusted models. For a given increase in blood %InAs, the increase in urinary %InAs was smaller in those with reduced eGFR, compared to those with normal eGFR (p=0.06); this effect modification was not observed for %MMA or %DMA. CONCLUSIONS Urinary excretion of InAs may be impaired in individuals with reduced renal function. Alternatively, increased As methylation capacity (as indicated by decreased urinary %InAs) may be detrimental to renal function.
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Affiliation(s)
- Brandilyn A Peters
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Megan N Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Shafiul Alam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
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George CM, Brooks WA, Graziano JH, Nonyane BAS, Hossain L, Goswami D, Zaman K, Yunus M, Khan AF, Jahan Y, Ahmed D, Slavkovich V, Higdon M, Deloria-Knoll M, O' Brien KL. Arsenic exposure is associated with pediatric pneumonia in rural Bangladesh: a case control study. Environ Health 2015; 14:83. [PMID: 26497043 PMCID: PMC4619558 DOI: 10.1186/s12940-015-0069-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 10/05/2015] [Indexed: 05/04/2023]
Abstract
BACKGROUND Pneumonia is the leading cause of death for children under 5 years of age globally, making research on modifiable risk factors for childhood pneumonia important for reducing this disease burden. Millions of children globally are exposed to elevated levels of arsenic in drinking water. However, there is limited data on the association between arsenic exposure and respiratory infections, particularly among pediatric populations. METHODS This case control study of 153 pneumonia cases and 296 controls 28 days to 59 months of age in rural Bangladesh is the first to assess whether arsenic exposure is a risk factor for pneumonia in a pediatric population. Cases had physician diagnosed World Health Organization defined severe or very severe pneumonia. Urine collected during hospitalization (hospital admission time point) and 30 days later (convalescent time point) from cases and a single specimen from community controls was tested for urinary arsenic by graphite furnace atomic absorption. RESULTS The odds for pneumonia was nearly double for children with urinary arsenic concentrations higher than the first quartile (≥6 μg/L) at the hospital admission time point (Odd Ratio (OR):1.88 (95% Confidence Interval (CI): 1.01, 3.53)), after adjustment for urinary creatinine, weight for height, breastfeeding, paternal education, age, and number of people in the household. This was consistent with findings at the convalescent time point where the adjusted OR for children with urinary arsenic concentrations greater than the first quartile (≥6 μg/L) was 2.32 (95% CI: 1.33, 4.02). CONCLUSION We observed a nearly two times higher odds of pneumonia for children with creatinine adjusted urinary arsenic concentrations greater than the first quartile (≥6 μg/L) at the hospital admission time point. This novel finding suggests that low to moderate arsenic exposure may be a risk factor for pneumonia in children under 5 years of age.
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Affiliation(s)
- Christine Marie George
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
- Department of International Health, Program in Global Disease Epidemiology and Control, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe Street, Room E5535, Baltimore, MD, 21205-2103, USA.
| | - W Abdullah Brooks
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Joseph H Graziano
- Department of Environmental Health, Mailman School of Public Health, Columbia University, New York, NY, USA.
| | - Bareng A S Nonyane
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Lokman Hossain
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Doli Goswami
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Khalequzzaman Zaman
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Mohammad Yunus
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Al Fazal Khan
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Yasmin Jahan
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Dilruba Ahmed
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh.
| | - Vesna Slavkovich
- Department of Environmental Health, Mailman School of Public Health, Columbia University, New York, NY, USA.
| | - Melissa Higdon
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Maria Deloria-Knoll
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Katherine L O' Brien
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
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Gao J, Tong L, Argos M, Scannell Bryan M, Ahmed A, Rakibuz-Zaman M, Kibriya MG, Jasmine F, Slavkovich V, Graziano JH, Ahsan H, Pierce BL. The Genetic Architecture of Arsenic Metabolism Efficiency:A SNP-Based Heritability Study of Bangladeshi Adults. Environ Health Perspect 2015; 123:985-92. [PMID: 25768001 PMCID: PMC4590755 DOI: 10.1289/ehp.1408909] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 03/11/2015] [Indexed: 05/04/2023]
Abstract
BACKGROUND Consumption of arsenic-contaminated drinking water adversely affects health. There is interindividual variation in arsenic metabolism efficiency, partially due to genetic variation in the arsenic methyltransferase (AS3MT) gene region. OBJECTIVES The goal of this study was to assess the overall contribution of genetic factors to variation in arsenic metabolism efficiency, as measured by the relative concentration of dimethylarsinic acid (DMA%) in urine. METHODS Using data on genome-wide single nucleotide polymorphisms (SNPs) and urinary DMA% for 2,053 arsenic-exposed Bangladeshi individuals, we employed various SNP-based approaches for heritability estimation and polygenic modeling. RESULTS Using data on all participants, the percent variance explained (PVE) for DMA% by all measured and imputed SNPs was 16% (p = 0.08), which was reduced to 5% (p = 0.34) after adjusting for AS3MT SNPs. Using information on close relatives only, the PVE was 63% (p = 0.0002), but decreased to 41% (p = 0.01) after adjusting for AS3MT SNPs. Regional heritability analysis confirmed 10q24.32 (AS3MT) as a major arsenic metabolism locus (PVE = 7%, p = 4.4 × 10(-10)), but revealed no additional regions. We observed a moderate association between a polygenic score reflecting elevated DMA% (composed of thousands of non-AS3MT SNPs) and reduced skin lesion risk in an independent sample (p < 0.05). We observed no associations for SNPs reported in prior candidate gene studies of arsenic metabolism. CONCLUSIONS Our results suggest that there are common variants outside of the AS3MT region that influence arsenic metabolism in Bangladeshi individuals, but the effects of these variants are very weak compared with variants near AS3MT. The high heritability estimates observed using family-based heritability approaches suggest substantial effects for rare variants and/or unmeasured environmental factors.
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Affiliation(s)
- Jianjun Gao
- Department of Public Health Sciences, The University of Chicago, Chicago, Illinois, USA
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Peters BA, Hall MN, Liu X, Parvez F, Siddique AB, Shahriar H, Uddin MN, Islam T, Ilievski V, Graziano JH, Gamble MV. Low-Dose Creatine Supplementation Lowers Plasma Guanidinoacetate, but Not Plasma Homocysteine, in a Double-Blind, Randomized, Placebo-Controlled Trial. J Nutr 2015; 145:2245-52. [PMID: 26311810 PMCID: PMC4580963 DOI: 10.3945/jn.115.216739] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/30/2015] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Creatine synthesis from guanidinoacetate consumes ~50% of s-adenosylmethionine (SAM)-derived methyl groups, accounting for an equivalent proportion of s-adenosylhomocysteine (SAH) and total homocysteine (tHcys) synthesis. Dietary creatine inhibits the synthesis of guanidinoacetate, thereby lowering plasma tHcys in rats. OBJECTIVE We tested the hypotheses that creatine supplementation lowers plasma guanidinoacetate, increases blood SAM, lowers blood SAH, and lowers plasma tHcys. METHODS Bangladeshi adults were randomly assigned to receive 1 of 4 treatments for 12 wk: placebo (n = 101), 3 g/d creatine (Cr; n = 101), 400 μg/d folic acid (FA; n = 153), or 3 g/d creatine plus 400 μg/d folic acid (Cr+FA; n = 103). The outcomes of plasma guanidinoacetate and tHcys, as well as whole blood SAM and SAH, were analyzed at baseline and week 12 by HPLC. Treatment effects of creatine supplementation were examined with the use of the group comparisons of Cr vs. placebo and Cr+FA vs. FA. RESULTS Plasma guanidinoacetate declined by 10.6% (95% CI: 4.9, 15.9) in the Cr group while increasing nonsignificantly in the placebo group (3.7%; 95% CI: -0.8, 8.5) (Pgroup difference = 0.0002). Similarly, plasma guanidinoacetate declined by 9.0% (95% CI: 3.4, 14.2) in the Cr+FA group while increasing in the FA group (7.0%; 95% CI: 2.0, 12.2) (Pgroup difference < 0.0001). Plasma tHcys declined by 23.4% (95% CI: 19.5, 27.1) and 21.0% (95% CI: 16.4, 25.2) in the FA and Cr+FA groups, respectively (Pgroup difference = 0.41), with no significant changes in the placebo or Cr groups (Pgroup difference = 0.35). A decrease in guanidinoacetate over time was associated with a decrease in tHcys over time in the Cr+FA group (β = 0.30; 95% CI: 0.17, 0.43; P < 0.0001). CONCLUSIONS Our findings indicate that whereas creatine supplementation downregulates endogenous creatine synthesis, this may not on average lower plasma tHcys in humans. However, tHcys did decrease in those participants who experienced a decline in plasma guanidinoacetate while receiving creatine plus folic acid supplementation. This trial was registered at clinicaltrials.gov as NCT01050556.
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Affiliation(s)
| | | | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY; and
| | | | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Hasan Shahriar
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | | | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
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Niedzwiecki MM, Liu X, Hall MN, Thomas T, Slavkovich V, Ilievski V, Levy D, Alam S, Siddique AB, Parvez F, Graziano JH, Gamble MV. Sex-specific associations of arsenic exposure with global DNA methylation and hydroxymethylation in leukocytes: results from two studies in Bangladesh. Cancer Epidemiol Biomarkers Prev 2015; 24:1748-57. [PMID: 26364164 DOI: 10.1158/1055-9965.epi-15-0432] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 08/20/2015] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Depletion of global 5-hydroxymethylcytosine (5-hmC) is observed in human cancers and is strongly implicated in skin cancer development. Although arsenic (As)-a class I human carcinogen linked to skin lesion and cancer risk-is known to be associated with changes in global %5-methylcytosine (%5-mC), its influence on 5-hmC has not been widely studied. METHODS We evaluated associations of As in drinking water, urine, and blood with global %5-mC and %5-hmC in two studies of Bangladeshi adults: (i) leukocyte DNA in the Nutritional Influences on Arsenic Toxicity study (n = 196; 49% male, 19-66 years); and (ii) peripheral blood mononuclear cell DNA in the Folate and Oxidative Stress study (n = 375; 49% male, 30-63 years). RESULTS Overall, As was not associated with global %5-mC or %5-hmC. Sex-specific analyses showed that associations of As exposure with global %5-hmC were positive in males and negative in females (P for interaction < 0.01). Analyses examining interactions by elevated plasma total homocysteine (tHcys), an indicator of B-vitamin deficiency, found that tHcys also modified the association between As and global %5-hmC (P for interaction < 0.10). CONCLUSION In two samples, we observed associations between As exposure and global %5-hmC in blood DNA that were modified by sex and tHcys. IMPACT Our findings suggest that As induces sex-specific changes in 5-hmC, an epigenetic mark that has been associated with cancer. Future research should explore whether altered %5-hmC is a mechanism underlying the sex-specific influences of As on skin lesion and cancer outcomes.
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Affiliation(s)
- Megan M Niedzwiecki
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York
| | - Megan N Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
| | - Tiffany Thomas
- Department of Pathology and Cell Biology, Columbia University, New York, New York
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Diane Levy
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York
| | - Shafiul Alam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Faruque Parvez
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York.
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Peters BA, Liu X, Hall MN, Ilievski V, Slavkovich V, Siddique AB, Alam S, Islam T, Graziano JH, Gamble MV. Arsenic exposure, inflammation, and renal function in Bangladeshi adults: effect modification by plasma glutathione redox potential. Free Radic Biol Med 2015; 85:174-82. [PMID: 25916185 PMCID: PMC4679178 DOI: 10.1016/j.freeradbiomed.2015.04.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/20/2015] [Accepted: 04/16/2015] [Indexed: 12/11/2022]
Abstract
Exposure to arsenic (As) in drinking water is a widespread public health problem leading to increased risk for multiple outcomes such as cancer, cardiovascular disease, and possibly renal disease; potential mechanisms include inflammation and oxidative stress. We tested the hypothesis that As exposure is associated with increased inflammation and decreased estimated glomerular filtration rate (eGFR) and examined whether the effects of As were modified by plasma glutathione (GSH), glutathione disulfide (GSSG), or the reduction potential of the GSSG/2GSH pair (EhGSH). In a cross-sectional study of N = 374 Bangladeshi adults having a wide range of As exposure, we measured markers of inflammation (plasma C-reactive protein (CRP), α-1 acid glycoprotein (AGP)), renal function (eGFR), GSH, and GSSG. In covariate-adjusted models, a 10% increase in water As, urinary As adjusted for specific gravity (uAs), or blood As (bAs) was associated with a 0.74% (p = 0.01), 0.90% (p = 0.16), and 1.39% (p = 0.07) increase in CRP, respectively; there was no association with AGP. A 10% increase in uAs or bAs was associated with an average reduction in eGFR of 0.16 (p = 0.12) and 0.21 ml/min/1.73 m(2) (p = 0.08), respectively. In stratified analyses, the effect of As exposure on CRP was observed only in participants having EhGSH > median (uAs p(Wald) = 0.03; bAs p(Wald) = 0.05). This was primarily driven by stronger effects of As exposure on CRP in participants with lower plasma GSH. The effects of As exposure on eGFR were not modified significantly by EhGSH, GSH, or GSSG. These data suggest that participants having lower plasma GSH and a more oxidized plasma EhGSH are at increased risk for As-induced inflammation. Future studies should evaluate whether antioxidant treatment lowers plasma EhGSH and reduces risk for As-induced diseases.
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Affiliation(s)
- Brandilyn A Peters
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Megan N Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Abu B Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Shafiul Alam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Tariqul Islam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Joseph H Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
| | - Mary V Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.
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