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Liao PJ, Lee CH, Wang SL, Chiou HY, Chen CJ, Seak CJ, Wu IW, Hsu KH. Low-to-Moderate Arsenic Exposure and Urothelial Tract Cancers with a Long Latent Period of Follow-Up in an Arseniasis Area. J Epidemiol Glob Health 2023; 13:807-815. [PMID: 37725327 PMCID: PMC10686965 DOI: 10.1007/s44197-023-00152-x] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 09/05/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Arsenic exposure can cause adverse health effects. The effects of long-term low-to-moderate exposure and methylations remain unclear. OBJECTIVE This study aims to examine the association between low-to-moderate arsenic exposure and urothelial tract cancers while considering the effects of methylation capacity. METHODS In this study, 5,811 participants were recruited from an arseniasis area in Taiwan for inorganic arsenic metabolite analysis. This follow-up study was conducted between August 1995 and December 2017. We identified 85 urothelial tract cancers in these participants, including 49 bladder and 36 upper urothelial tract cancer cases. A Cox proportional hazards model was employed. RESULTS The analyses revealed a significant association between concentrations of inorganic arsenic in water > 100 ug/L and bladder cancer occurrence, with a hazard ratio (HR) of 4.88 (95% CI 1.35-17.61). A monotonic trend was observed between concentrations of inorganic arsenic in water (from 0 to > 100 ug/L) and the incidence of urothelial tract cancer, including bladder cancer (p < 0.05) and upper urothelial tract cancers (p < 0.05). Participants with a lower primary methylation index or higher secondary methylation index had a prominent effect. CONCLUSIONS Rigorous regulations and active interventions should be considered for populations with susceptible characteristics.
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Affiliation(s)
- Pei-Ju Liao
- International Program of Health Informatics and Management, Chang Gung University, Taoyuan, Taiwan
- Master Degree Program in Health and Long-Term Care Industry, Chang Gung University, Taoyuan, Taiwan
- Division of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Chih-Hung Lee
- Department of Dermatology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Shu-Li Wang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Hung-Yi Chiou
- Institute of Population Health Sciences, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
- Master Program in Applied Epidemiology, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Chien-Jen Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Chen-June Seak
- Department of Emergency Medicine, New Taipei Municipal Tucheng Hospital, New Taipei City, Taiwan
- Department of Emergency Medicine, Lin-Kou Medical Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - I-Wen Wu
- Division of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Kuang-Hung Hsu
- Department of Emergency Medicine, Lin-Kou Medical Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
- Laboratory for Epidemiology, Department of Health Care Management, and Healthy Aging Research Center, Chang Gung University, No. 259, Wen-Hwa 1St Road, Kwei-Shan, Taoyuan, 333, Taiwan.
- Research Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan.
- Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan.
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Jiang R, Zhang Q, Ji D, Jiang T, Hu Y, He S, Tao L, Shen J, Zhang W, Song Y, Ma Y, Tong S, Tao F, Yao Y, Liang C. Influence of combined exposure levels of total arsenic and inorganic arsenic on arsenic methylation capacity among university students: findings from Bayesian kernel machine regression analysis. Environ Sci Pollut Res Int 2022; 29:28714-28724. [PMID: 34988804 DOI: 10.1007/s11356-021-17906-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/29/2021] [Indexed: 06/14/2023]
Abstract
The arsenic (As) methylation capacity is an important determinant of susceptibility to As-related diseases. Total As (TAs) or inorganic As (iAs) was reported to associated with As methylation capacity. We measured urinary concentrations of iAs, monomethylarsonic acid (MMA), and dimethylarsinic acid (DMA) by using HPLC-HG-AFS and calculated the primary methylation capacity index (PMI) and secondary methylation capacity index (SMI) in 209 university students in Hefei, China, a non-As endemic area. Volunteers were given a standardized questionnaire asking about their sociodemographic characteristics. Bayesian kernel machine regression (BKMR) analysis was used to estimate the association of lnTAs and lniAs levels with methylation indices (ln%MMA, ln%DMA, lnPMI, lnSMI). The median concentrations of iAs, MMA, and DMA were 1.22, 0.92, and 12.17 μg/L, respectively; the proportions of iAs, MMA, and DMA were 8.76%, 6.13%, and 84.84%, respectively. Females had higher %DMA and lower %MMA than males. The combined levels of lnTAs and lniAs showed a decrease in the changes in ln%DMA and lnSMI. With regard to the single exposure level, the lnTAs showed positive correlations with ln%DMA, lnPMI, and lnSMI when lniAs was set at a specific level, while lniAs showed negative correlations with ln%DMA, lnPMI, and lnSMI when lnTAs was set at a specific level; all the dose-response relationships were nonlinear. Our results suggested that combined levels of TAs and iAs play an important role in reducing As methylation capacity, especially iAs, and the reduction only occurs when TAs and iAs are present up to a certain combined level.
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Affiliation(s)
- Rui Jiang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Qing Zhang
- Department of Ophthalmology, The Second Hospital of Anhui Medical University, No 678 Furong Road, Hefei, 230601, Anhui, China
| | - Dongmei Ji
- NHC Key Laboratory of Study On Abnormal Gametes and Reproductive Tract, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Tingting Jiang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yuan Hu
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Shitao He
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Long Tao
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Juan Shen
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Wei Zhang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yuxiang Song
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yicheng Ma
- The Second Clinical Medical College, Anhui Medical University, No 678 Furong Road, Hefei, 230601, Anhui, China
| | - Shilu Tong
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China
- Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- School of Public Health and Social Work and Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Fangbiao Tao
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Anhui Provincial Key Laboratory of Population Health and Aristogenics/Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
| | - Yuyou Yao
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Anhui Provincial Key Laboratory of Population Health and Aristogenics/Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
| | - Chunmei Liang
- School of Public Health, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei, 230032, Anhui, China.
- Anhui Provincial Key Laboratory of Population Health and Aristogenics/Key Laboratory of Environmental Toxicology of Anhui Higher Education Institutes, Anhui Medical University, No 81 Meishan Road, Hefei, 230032, Anhui, China.
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Olmos V, Astolfo MA, Sassone AH, Villaamil Lepori EC. The level of exposure affects the arsenic urinary methylation profile of a population of children. J Hazard Mater 2021; 415:125623. [PMID: 33740719 DOI: 10.1016/j.jhazmat.2021.125623] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/29/2020] [Accepted: 03/06/2021] [Indexed: 06/12/2023]
Abstract
Differences in the As methylation capacity of Argentine children, exposed to different levels of As in drinking water were evaluated, considering the gender and the presence of the As3MT T860C gene polymorphism. Inorganic As (%IAs), monomethylated As (%MMA) and dimethylated As (%DMA), primary methylation index (PMI) and secondary methylation index (SMI) were evaluated and represented the As methylation capacity. Urinary As ranged from 18 to 5106 µg/g creatinine. Comparisons were performed between lowest and highest quartiles of urinary As. The level of exposure was positively related to urinary %MMA and negatively to %DMA and to SMI. Considering the presence of the As3MT T860C polymorphism, the level of exposure increased %MMA, and decreased %DMA and the SMI in carriers of the T/T genotype. SMI OR for T/T carriers was 10.61 (95% CI: 2.16-52.16, p: 0.0036). Regarding the gender, the level of exposure increased %MMA, and decreased %DMA and the SMI in girls and boys. SMI OR for girls was 8.71 (95% CI: 1.48-51.08, p: 0.0165) and for boys, OR: 18.15 (95% CI: 2.03-162.35, p: 0.0095). It was possible to identify the level of exposure as a factor that can modify the influence that other factors have on the methylation of As.
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Affiliation(s)
- Valentina Olmos
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Toxicología y Química Legal, Junin 956, 7th Floor, Buenos Aires C1113AAD, Argentina.
| | - María Agustina Astolfo
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Toxicología y Química Legal, Junin 956, 7th Floor, Buenos Aires C1113AAD, Argentina
| | - Adriana H Sassone
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Toxicología y Química Legal, Junin 956, 7th Floor, Buenos Aires C1113AAD, Argentina
| | - Edda C Villaamil Lepori
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Cátedra de Toxicología y Química Legal, Junin 956, 7th Floor, Buenos Aires C1113AAD, Argentina
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Yamauchi H, Takata A. Arsenic metabolism differs between child and adult patients during acute arsenic poisoning. Toxicol Appl Pharmacol 2021; 410:115352. [PMID: 33264645 DOI: 10.1016/j.taap.2020.115352] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/19/2020] [Accepted: 11/24/2020] [Indexed: 11/22/2022]
Abstract
Epidemiological studies on chronic arsenic poisoning have clarified the relationship between various adverse effects and methylation efficiency or methylation capacity. However, no study has similarly investigated such effects on patients with acute arsenic poisoning. In the present work, we studied 61 patients with acute oral arsenic poisoning occurring after consumption of an arsenic trioxide-laced meal (curry soup). The cohort included children (defined as under 15 year old [y/o], n = 22) and adults (over 16 y/o, n = 39) whose urinary arsenic profiles were analyzed. None of these patients had received treatment with chelating agents. The estimated median (IQR) arsenic intake was 64.5 mg (48.3-80.5 mg) in children and 76.0 mg (56.0-91.0 mg) in adults, and these values were not significantly different. Symptoms of poisoning in children improved approximately 1 week after hospitalization. However, the symptoms in most adults deteriorated with severe signs of arsenic poisoning. Urinary arsenic profiles of all the patients were analyzed to obtain the following information: % monomethylarsonic acid (MMA), % dimethylarsinic acid (DMA), second methylation ratio (DMA/MMA), and secondary methylation index (SMI, DMA/MMA + DMA). The levels of these parameters may help identify patients at risk for worsening symptoms. %MMA, an indicator of incomplete methylation, increased more in adults, who experienced more severe symptom progression, compared with children. In contrast, %DMA, which indicates more complete and efficient methylation, increased particularly in children with mild symptoms. Overall the present results indicate that children possess an excellent capacity for methylation (second methylation ratio) of arsenic to DMA and therefore, experience relatively less severe progression of symptomology during acute arsenic poisoning.
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Kong C, Yang L, Yu J, Li H, Wei B, Guo Z, Xia Y, Wu K. Changes in urinary arsenic species and methylation capacity in original arsenic exposure cohort after water quality improvement. Environ Geochem Health 2020; 42:2841-2851. [PMID: 32034620 DOI: 10.1007/s10653-020-00523-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Water quality improvement is the most efficient way to prevent arsenic exposure. After the cessation of arsenic ingestion, arsenic methylation capacity of the exposed population can change significantly. The factors associated with these changes remain poorly understood. Therefore, arsenic methylation capacity in a study cohort was estimated before and after water quality improvement in the present study. Results indicated that urinary content of the arsenic species in the study cohort significantly decreased after water quality improvement. In addition, the proportions of inorganic arsenic (%iAs) and monomethyl arsenic acid (%MMA) were significantly decreased, while proportions of dimethyl arsenic (%DMA) increased. The primary methylation index (PMI) and secondary methylation index (SMI) increased from 0.85 to 0.92 and 0.82 to 0.84, respectively. Arsenic species urinary content and arsenic methylation index varied slightly between the study cohort after water quality improvement and the control cohort. The rate of increase in PMI was higher than that in SMI. The study group aged 31-50 years had the highest increase in PMI. Logistic regression revealed that %DMA before water quality improvement was negatively associated with the increase in PMI, while %iAs were positively related, and %MMA were positively associated with the increase in SMI. It is concluded that urinary arsenic species content and arsenic methylation capacity increased to the levels of the control cohort after water quality improvement. An increase in primary arsenic methylation capacity may be a burden on the secondary arsenic methylation capacity. The main role of arsenic methylation capacity recovery may be the cessation of arsenic exposure.
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Affiliation(s)
- Chang Kong
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
- College of Resources and Environment, University of Chinese Academy of Sciences, Huairou, People's Republic of China
| | - Linsheng Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
- College of Resources and Environment, University of Chinese Academy of Sciences, Huairou, People's Republic of China
| | - Jiangping Yu
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
| | - Hairong Li
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
- College of Resources and Environment, University of Chinese Academy of Sciences, Huairou, People's Republic of China
| | - Binggan Wei
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China.
| | - Zhiwei Guo
- Inner Mongolia Comprehensive Center for Disease Control and Prevention, Hohhot, Inner Mongolia, People's Republic of China
| | - Yajuan Xia
- Inner Mongolia Comprehensive Center for Disease Control and Prevention, Hohhot, Inner Mongolia, People's Republic of China
| | - Kegong Wu
- Inner Mongolia Comprehensive Center for Disease Control and Prevention, Hohhot, Inner Mongolia, People's Republic of China
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Desai G, Barg G, Queirolo EI, Vahter M, Peregalli F, Mañay N, Kordas K. A cross-sectional study of general cognitive abilities among Uruguayan school children with low-level arsenic exposure, potential effect modification by methylation capacity and dietary folate. Environ Res 2018; 164:124-131. [PMID: 29486343 PMCID: PMC5911190 DOI: 10.1016/j.envres.2018.02.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 09/04/2017] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Few studies have evaluated the association between low-level arsenic (As) exposure and cognitive performance among children. OBJECTIVES In this cross-sectional study, we assessed the association between low-level As exposure and cognitive performance among 5-8 year-old children in Montevideo, and tested effect modification by As methylation capacity and children's dietary folate intake. METHODS We measured total urinary As (UAs) concentrations and the proportion of monomethylarsonic acid (MMA) in the urine of 328 children. Seven subtests of the standardized Woodcock-Muñoz cognitive battery were used to assess cognitive performance, from which, the general intellectual abilities (GIA) score was derived. Total folate intake was estimated from two 24-h dietary recalls. Linear regression analyses were performed. Effect modification was assessed by stratifying at the median %MMA value and tertiles of total folate intake calculated as micrograms (µg) of dietary folate equivalents (dfe). RESULTS The median UAs was 11.9 µg/l (range = 1.4-93.9), mean folate intake was 337.4 (SD = 123.3) µg dfe, and median %MMA was 9.42 (range = 2.6-24.8). There was no association between UAs and cognitive abilities, and no consistent effect modification by %MMA. UAs was associated inversely with concept formation, and positively with cognitive efficiency and numbers reversed subtest in the lowest folate intake tertile; UAs was also positively associated with sound integration in the second tertile and concept formation in the highest tertile of folate intake. There was no consistent pattern of effect modification by %MMA or folate intake. CONCLUSION There was no association between low-level As exposure and general cognitive abilities.
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Affiliation(s)
- Gauri Desai
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA.
| | - Gabriel Barg
- Department of Neurocognition, Catholic University of Uruguay, Montevideo, Uruguay
| | - Elena I Queirolo
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | | | - Fabiana Peregalli
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | - Nelly Mañay
- Faculty of Chemistry, University of the Republic of Uruguay, Montevideo, Uruguay
| | - Katarzyna Kordas
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA
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Wei B, Yu J, Li H, Yang L, Xia Y, Wu K, Gao J, Guo Z, Cui N. Arsenic Metabolites and Methylation Capacity Among Individuals Living in a Rural Area with Endemic Arseniasis in Inner Mongolia, China. Biol Trace Elem Res 2016; 170:300-8. [PMID: 26335574 DOI: 10.1007/s12011-015-0490-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/20/2015] [Indexed: 12/23/2022]
Abstract
More than 0.3 million individuals are subject to chronic exposure to arsenic via their drinking water in Inner Mongolia, China. To determine arsenic methylation capacity profiles for such individuals, concentrations of urinary arsenic metabolites were measured for 548 subjects using high-performance liquid chromatography and a hydride generator combined with inductively coupled plasma-mass spectrometry. Mean urinary concentrations of dimethylarsonic acid (DMA), monomethylarsonic acid (MMA), inorganic arsenic (iAs), and total arsenic (TAs) were 200.50, 46.71, 52.96, and 300.17 μg/L, respectively. The %iAs, %DMA, and %MMA were 15.98, 69.72, and 14.29%. Mean urinary %iAs and %MMA were higher in males, while urinary %DMA was higher in females. There was a strong positive correlation between %iAs and %MMA, with negative correlations between %iAs and %DMA, and %iAs and %MMA. In addition, %iAs and %MMA were positively associated with total arsenic in drinking water (WAs), while %DMA was negatively related with WAs. Regression analysis indicated that the primary methylation index (PMI) and secondary methylation index (SMI) generally decreased with increasing WAs. Females had a higher arsenic methylation capacity compared to males. Younger subjects had lower primary arsenic methylation capacity. However, the secondary arsenic methylation capacity was hardly affected by age. Moreover, both primary and secondary arsenic methylation capacities were negatively related to WAs.
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Affiliation(s)
- Binggan Wei
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
| | - Jiangping Yu
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
| | - Hairong Li
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
| | - Linsheng Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China.
| | - Yajuan Xia
- Inner Mongolia Center for Endemic Disease Control and Research, Huhhot, Inner Mongolia, China
| | - Kegong Wu
- Inner Mongolia Center for Endemic Disease Control and Research, Huhhot, Inner Mongolia, China
| | - Jianwei Gao
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11 A Datun Road, Beijing, 100101, People's Republic of China
| | - Zhiwei Guo
- Inner Mongolia Center for Endemic Disease Control and Research, Huhhot, Inner Mongolia, China
| | - Na Cui
- Inner Mongolia Center for Endemic Disease Control and Research, Huhhot, Inner Mongolia, China
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Wang LJ, Zhang HW, Zhou JY, Liu Y, Yang Y, Chen XL, Zhu CH, Zheng RD, Ling WH, Zhu HL. Betaine attenuates hepatic steatosis by reducing methylation of the MTTP promoter and elevating genomic methylation in mice fed a high-fat diet. J Nutr Biochem 2013; 25:329-36. [PMID: 24456734 DOI: 10.1016/j.jnutbio.2013.11.007] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 11/08/2013] [Accepted: 11/16/2013] [Indexed: 01/04/2023]
Abstract
Aberrant DNA methylation contributes to the abnormality of hepatic gene expression, one of the main factors in the pathogenesis of nonalcoholic fatty liver disease (NAFLD). Betaine is a methyl donor and has been considered to be a lipotropic agent. However, whether betaine supplementation improves NAFLD via its effect on the DNA methylation of specific genes and the genome has not been explored. Male C57BL/6 mice were fed either a control diet or high-fat diet (HFD) supplemented with 0%, 1% and 2% betaine in water (wt/vol) for 12 weeks. Betaine supplementation ameliorated HFD-induced hepatic steatosis in a dose-dependent manner. HFD up-regulated FAS and ACOX messenger RNA (mRNA) expression and down-regulated PPARα, ApoB and MTTP mRNA expression; however, these alterations were reversed by betaine supplementation, except ApoB. MTTP mRNA expression was negatively correlated with the DNA methylation of its CpG sites at -184, -156, -63 and -60. Methylation of these CpG sites was lower in both the 1% and 2% betaine-supplemented groups than in the HFD group (averages; 25.55% and 14.33% vs. 30.13%). In addition, both 1% and 2% betaine supplementation significantly restored the methylation capacity [S-adenosylmethionine (SAM) concentration and SAM/S-adenosylhomocysteine ratios] and genomic methylation level, which had been decreased by HFD (0.37% and 0.47% vs. 0.25%). These results suggest that the regulation of aberrant DNA methylation by betaine might be a possible mechanism of the improvements in NAFLD upon betaine supplementation.
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Affiliation(s)
- Li-jun Wang
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Hong-wei Zhang
- Department of Hepatobiliary Surgery, Sun Yat-Sen Memorial Hospital, University of Sun Yat-Sen, 510120 Guangzhou, People's Republic of China
| | - Jing-ya Zhou
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Yan Liu
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Yang Yang
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Xiao-ling Chen
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Cui-hong Zhu
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Rui-dan Zheng
- Research and Therapy Center for Liver Disease, the Affiliated Dongnan Hospital of Xiamen University, 363000 Zhangzhou, People's Republic of China
| | - Wen-hua Ling
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China
| | - Hui-lian Zhu
- Faculty of Nutrition, School of Public Health, Sun Yat-Sen University, 510080 Guangzhou, People's Republic of China.
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