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Mu H, Ye L, Wang B. Detailed resume of S-methyltransferases: Categories, structures, biological functions and research advancements in related pathophysiology and pharmacotherapy. Biochem Pharmacol 2024; 226:116361. [PMID: 38876259 DOI: 10.1016/j.bcp.2024.116361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 05/19/2024] [Accepted: 06/10/2024] [Indexed: 06/16/2024]
Abstract
Methylation is a vital chemical reaction in the metabolism of many drugs, neurotransmitters, hormones, and exogenous compounds. Among them, S-methylation plays a significant role in the biotransformation of sulfur-containing compounds, particularly chemicals with sulfhydryl groups. Currently, only three S-methyltransferases have been reported: thiopurine methyltransferase (TPMT), thiol methyltransferase (TMT), and thioether methyltransferase (TEMT). These enzymes are involved in various biological processes such as gene regulation, signal transduction, protein repair, tumor progression, and biosynthesis and degradation reactions in animals, plants, and microorganisms. Furthermore, they play pivotal roles in the metabolic pathways of essential drugs and contribute to the advancement of diseases such as tumors. This paper reviews the research progress on relevant structural features, metabolic mechanisms, inhibitor development, and influencing factors (gene polymorphism, S-adenosylmethionine level, race, sex, age, and disease) of S-methyltransferases. We hope that a better comprehension of S-methyltransferases will help to provide a reference for the development of novel strategies for related disorders and improve long-term efficacy.
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Affiliation(s)
- Hongfei Mu
- Department of Drug Metabolism, Beijing Key Laboratory of Non-Clinical Drug Metabolism and PK/PD Study, State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
| | - Lisha Ye
- Department of Drug Metabolism, Beijing Key Laboratory of Non-Clinical Drug Metabolism and PK/PD Study, State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
| | - Baolian Wang
- Department of Drug Metabolism, Beijing Key Laboratory of Non-Clinical Drug Metabolism and PK/PD Study, State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, PR China.
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Dack K, Huang P, Taylor CM, Rai D, Lewis SJ. Environmental and genetic predictors of whole blood mercury and selenium concentrations in pregnant women in a UK birth cohort. ENVIRONMENTAL ADVANCES 2024; 15:100469. [PMID: 38562418 PMCID: PMC10951965 DOI: 10.1016/j.envadv.2023.100469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 12/13/2023] [Accepted: 12/19/2023] [Indexed: 04/04/2024]
Abstract
There is evidence that tissue concentrations of mercury (Hg) and selenium (Se) are predicted by numerous dietary, sociodemographic, environmental, and genetic factors. This study aimed to estimate the relative importance of predictors of Hg and Se concentrations in blood samples taken from pregnant women. The Avon Longitudinal Study of Parents and Children (ALSPAC) in the UK measured whole blood Hg and Se concentrations in 3,972 pregnant women. We identified 30 potential predictors of Hg and 24 of Se, which were evaluated using cross-validated random forests to identify the optimal models for predictive power. The relative importance of individual variables was estimated by averaging the added-R2 per predictor. Linkage disequilibrium score regression was used to estimate the variance explained by genotype. A multivariable model of 14 predictors explained 22.4% of Hg variance (95% CI: 13.0 to 37.1), including 6.9% from blood Se and 3.2% from white fish consumption. There were 11 predictors which explained 15.3% of Se variance (CI: 8.9 to 25.9), including 6.4% from blood Hg, 1.3% from blood lead, and 1.3% from oily fish. Measured genetic variation explained 30% of Hg variance (CI: 8.4 to 51.5) and 37.5% of Se (CI: 10.4 to 64.5). A high proportion of Hg and Se variance could be explained from dietary, sociodemographic, metabolic, and genetic factors. Seafood consumption was less predictive of Hg than may be expected and other factors should be considered when determining risk of exposure. There was tentative evidence that genotype is a major contributor to Hg and Se variation, possibly by modifying the efficacy of internal metabolism.
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Affiliation(s)
- Kyle Dack
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Peiyuan Huang
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Caroline M Taylor
- Centre for Academic Child Health, Bristol Medical School, University of Bristol, Bristol, UK
| | - Dheeraj Rai
- Medical Research Council Integrative Epidemiology Unit, University of Bristol, Bristol, UK
| | - Sarah J Lewis
- Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
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Cheff DM, Skröder H, Akhtar E, Cheng Q, Hall MD, Raqib R, Kippler M, Vahter M, Arnér ES. Arsenic exposure and increased C-reactive protein are independently associated with lower erythrocyte glutathione peroxidase activity in Bangladeshi children. REDOX BIOCHEMISTRY AND CHEMISTRY 2023; 5-6:100015. [PMID: 37908807 PMCID: PMC10613583 DOI: 10.1016/j.rbc.2023.100015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Toxic metal contaminants present in food and water have widespread effects on health and disease. Chalcophiles, such as arsenic, cadmium, and mercury, show a high affinity to selenium and exposure to these metals could have a modulating effect on enzymes dependent on selenocysteine in their active sites. The aim of this study was to assess the influence of these metals on the activity of the selenoprotein glutathione peroxidase 1 (GPX1) in erythrocytes of 100 children residing in rural Bangladesh, where drinking water often contains arsenic. GPX1 expression, as measured using high-throughput immunoblotting, showed little correlation with GPX activity (rs = 0.02, p = 0.87) in blood samples. Toxic metals and selenium measured in erythrocytes using inductively coupled plasma mass spectrometry (ICP-MS) and C-reactive protein (CRP) measured in plasma, were all considered as effectors of this divergence in GPX enzymatic activity. Arsenic concentrations in erythrocytes were most influential for GPX1 activity (rs = -0.395, p < 0.0001), and CRP levels also negatively impacted GPX1 activity (rs = -0.443, p < 0.0001). These effects appear independent of each other as arsenic concentrations and CRP showed no correlation (rs = 0.124, p = 0.2204). Erythrocyte selenium, cadmium, and mercury did not show any correlation with GPX1 activity, nor with CRP or arsenic. Our findings suggest that childhood exposure to inorganic arsenic, as well as inflammation triggering the release of CRP, may negatively affect GPX1 activity in erythrocytes.
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Affiliation(s)
- Dorian M. Cheff
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE, 171 77, Stockholm, Sweden
- Early Translation Branch, National Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, MD, 20850, United States
| | - Helena Skröder
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, Box 210, SE, 171 77, Stockholm, Sweden
| | - Evana Akhtar
- International Center for Diarrheal Disease Research, GPO Box 128, Dhaka, 1000, Bangladesh
| | - Qing Cheng
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE, 171 77, Stockholm, Sweden
| | - Matthew D. Hall
- Early Translation Branch, National Center for Advancing Translational Sciences, National Institutes of Health, 9800 Medical Center Drive, Rockville, MD, 20850, United States
| | - Rubhana Raqib
- International Center for Diarrheal Disease Research, GPO Box 128, Dhaka, 1000, Bangladesh
| | - Maria Kippler
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, Box 210, SE, 171 77, Stockholm, Sweden
| | - Marie Vahter
- Unit of Metals and Health, Institute of Environmental Medicine, Karolinska Institutet, Box 210, SE, 171 77, Stockholm, Sweden
| | - Elias S.J. Arnér
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, SE, 171 77, Stockholm, Sweden
- Department of Selenoprotein Research and the National Tumor Biology Laboratory, National Institute of Oncology, Budapest, Hungary
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Jia Y, Li G, Wang R, Feng C, Qi L, Wang Y, Su S, Zou Y, Liu X, Wang Y, Zhang Y, Du L, Sun H, Hao S, Hou J, Feng H, Li Q, Wang T. A county-level spatial epidemiological study of hair selenium and Keshan disease. Front Nutr 2022; 9:1011460. [DOI: 10.3389/fnut.2022.1011460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/20/2022] [Indexed: 11/09/2022] Open
Abstract
BackgroundNo spatial analysis of hair selenium and Keshan disease (KD) on a nationwide county-level has been performed. Selenium deficiency is a recognized environmental risk factor for KD. Hair selenium is one of the recognized biomarkers of selenium nutrition. This study aimed to perform a geographically precise and visualized assessment of the achievement of KD prevention and control at the level of selenium nutrition in terms of etiology.MethodsA spatial ecological study was conducted. The hair selenium content of the residents was assayed using an atomic fluorescence spectrometer. The spatial analysis was performed using ArcGIS.ResultsThe median of the hair selenium levels of the 3,028 participants in the 1,174 counties was 0.38 mg/kg, and the content of inhabitants in KD endemic counties was significantly lower than that in KD non-endemic counties (0.34 vs. 0.39 mg/kg, z = −10.03, P < 0.0001). The proportion of Se-deficient and Se-marginal counties in KD endemic counties was significantly higher than that in KD non-endemic counties (59.4 vs. 29.0%, z = −7.45, P < 0.0001). The global autocorrelation analysis was not statistically significant (Moran's I = 0.0005, P = 0.68). Local autocorrelation analysis identified 174 low-low clusters of hair selenium levels, 83 (47.7%) of which are KD endemic counties located in KD endemic provinces of Henan, Gansu, Shaanxi, Inner Mongolia, Jilin, and Heilongjiang. The hair selenium featured a positive correlation with per capita GDP (rs = 0.20, P < 0.0001).ConclusionThe median of the hair selenium levels of inhabitants living in KD endemic counties was significantly lower than that in KD non-endemic counties. All the 83 KD endemic counties with low-low clusters of hair selenium levels should be prioritized in KD precision prevention and control. These findings are geographically precise and visualized evidence of the assessment of the effectiveness of KD prevention and control at the level of selenium nutrition in terms of etiology.
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Jia Y, Wang R, Li G, Feng C, Qi L, Wang Y, Su S, Zou Y, Liu X, Wang Y, Zhang Y, Du L, Sun H, Hao S, Hou J, Feng H, Li Q, Wang T. Hair Selenium of Residents in Keshan Disease Endemic and Non-endemic Regions in China. Biol Trace Elem Res 2022; 201:3256-3267. [PMID: 36214956 DOI: 10.1007/s12011-022-03444-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 10/03/2022] [Indexed: 11/26/2022]
Abstract
Few nationwide investigations on hair selenium (Se) and Keshan disease (KD) have been conducted. KD is closely associated with Se deficiency. Hair Se is an important biomarker for selenium nutrition. This research aimed to provide evidence for assessment of KD prevention, control, and elimination at the molecular level from the etiological perspective of selenium nutrition. The hair Se of the residents living in the KD endemic and non-endemic areas were determined through atomic fluorescence spectrometer. The median of the hair Se levels of the inhabitants living in KD endemic counties was significantly lower than that in KD non-endemic counties (0.34 vs 0.39 mg/kg, U = -10.03, P < 0.0001). The proportion of Se-deficient or Se-marginal residents in KD endemic counties was significantly higher than that in KD non-endemic counties (56.9% vs 36.6%, U = -9.57, P < 0.0001). The medians of the hair Se levels in KD endemic provinces of Shannxi, Heilongjiang, and Gansu were the lowest (0.35mg/kg), and in the category of Se-marginal status. The hair Se level featured a positive Spearman correlation with per capita disposable income (rs = 0.20, P < 0.0001). In conclusion, the median of the hair Se contents of residents living in KD endemic counties was significantly lower than that in KD non-endemic counties. The hair Se contents of nearly 57% of inhabitants living in KD endemic regions were in Se-deficient or Se-marginal status. The KD endemic provinces of Shannxi, Heilongjiang, and Gansu should be given high priority in KD prevention and control.
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Affiliation(s)
- Yuehui Jia
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
- School of Public Health, Qiqihar Medical University, Qiqihar, 161000, China
| | - Ruixiang Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Guijin Li
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Chen Feng
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Lei Qi
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Yuanyuan Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Shengqi Su
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Yuanjie Zou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo, 315010, China
| | - Xu Liu
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
- Yidu Central Hospital of Weifang, Weifang, 262500, China
| | - Yanan Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
- School of Public Health and Management, Binzhou Medical University, Yantai, 264003, China
| | - Yiyi Zhang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
- Yantai Disease Prevention and Control Center, Yantai, 264003, China
| | - Linlin Du
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Huixin Sun
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Shuxiu Hao
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Jie Hou
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Hongqi Feng
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China
| | - Qi Li
- The Third Affiliated Hospital of Harbin Medical University, No. 150 Haping Road, Harbin, 150081, China.
| | - Tong Wang
- Institute of Keshan Disease, Chinese Center for Endemic Disease Control, Harbin Medical University, 157 Baojian Road, Harbin, 150081, China.
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Wang Y, Wang Y, Yan C. Gender differences in trace element exposures with cognitive abilities of school-aged children: a cohort study in Wujiang city, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:64807-64821. [PMID: 35474433 DOI: 10.1007/s11356-022-20353-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
Trace elements persist in the environment, and their early exposure may adversely affect children's intellectual development. To clarify the influence of blood trace element levels in newborns and school-aged children, we used Wechsler Intelligence Scale for children (WISC-CR) to explore intellectual development level of 148 school-aged children based on a population cohort study. Lead (Pb), selenium (Se), arsenic (As), copper (Cu), manganese (Mn) and chromium (Cr) in cord blood and Pb, As, Cu in venous blood were determined by inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectrometer (AAS). Our analysis of the correlation between children's mental development and trace element content found children's cognitive abilities negatively correlate with Pb (PIQ: β=-0.109, P=0.03737) and Cu (PIQ: β=-0.031, P=0.04431; FISQ: β=-0.031, P=0.02137) levels in cord blood. Prenatal low-level As exposure may negatively affect girls' performance intelligence quotient (PIQ) and verbal intelligence quotient (VIQ). There were differences in Se levels in cord blood and venous blood between boys and girls (P=0.010; P=0.073). High Se levels were associated with a lower VIQ in boys and a higher VIQ in girls. Prenatal exposure to Pb, As and Cu may weaken children's cognitive abilities at school age. Se exposure may have opposite effects on cognitive abilities affected by dose and gender.
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Affiliation(s)
- Yihong Wang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No.1665, Kongjiang Road, Shanghai, 200092, China
| | - Yaqian Wang
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China
| | - Chonghuai Yan
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, No.1665, Kongjiang Road, Shanghai, 200092, China.
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China.
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de Oliveira Campos R, de Jesus LM, Morais DA, de Sousa Júnior WT, de Oliveira Souza VC, Oliveira CA, Júnior FB, Macedo M, Hegedüs L, Ramos HE. Low urinary selenium levels are associated with iodine deficiency in Brazilian schoolchildren and adolescents. Endocrine 2021; 73:609-616. [PMID: 33719010 DOI: 10.1007/s12020-021-02681-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 02/27/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Selenium (Se) and iodine (Io) are important micronutrients for the proper functioning of the thyroid gland, as they are crucial for the synthesis and activation of the thyroid hormones (TH) triiodothyronine (T3) and thyroxine (T4). OBJECTIVE To evaluate the Se and Io nutritional status among schoolchildren. METHODOLOGY Cross-sectional, descriptive and analytical study conducted in 982 schoolchildren aged 6-14 years from public schools in the state of Bahia, Brazil. Sociodemographic and anthropometric variables, as well as urinary Se (USC) and Io concentrations (UIC) using the inductively coupled plasma mass spectrometry (ICP-MS) method and thyroid-stimulating hormone (TSH) from filter paper blood collection, were evaluated. RESULTS The median USC and UIC were 38.7 and 210.0 (IQR: 26.8-52.9 and 129.3-334.1 μg/L, respectively). The prevalence of iodine deficiency and excessive UIC were observed in 17.1% and 30.9% of schoolchildren, respectively. Concomitant low USC and IoD was found in 3.9% of schoolchildren. There was a positive correlation between USC and UIC (r = 0.60; p = 0.00). The median TSH was 0.95 (IQR: 0.69-1.30 µUI/L). CONCLUSIONS This study demonstrates that USC is a good biomarker for assessing Se status, meantime more studies are needed to establish cutoff USC in child population. Despite adequate median intake, a subgroup of schoolchildren had IoD and low USC. The correlation between UIC and USC point at the importance of two micronutrients, raising the question whether measuring Se should be included in monitoring programs that address the prevention of nutritional disturbances.
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Affiliation(s)
- Renata de Oliveira Campos
- Health and Science Center, Federal University Reconcavo of Bahia, Santo Antonio de Jesus, BA, Brazil
- Postgraduate Program in Interactive Processes of Organs and Systems, Health & Science Institute, Federal University of Bahia, Salvador, BA, Brazil
- Bioregulation Department, Health and Science Institute, Federal University of Bahia, Salvador, BA, Brazil
| | - Lorena Maia de Jesus
- Bioregulation Department, Health and Science Institute, Federal University of Bahia, Salvador, BA, Brazil
| | - Déborah Araújo Morais
- Laboratory of Toxicology and Essentiality of Metals, School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Wellington Tavares de Sousa Júnior
- Laboratory of Toxicology and Essentiality of Metals, School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Vanessa Cristina de Oliveira Souza
- Laboratory of Toxicology and Essentiality of Metals, School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Clotilde Assis Oliveira
- Health and Science Center, Federal University Reconcavo of Bahia, Santo Antonio de Jesus, BA, Brazil
| | - Fernando Barbosa Júnior
- Laboratory of Toxicology and Essentiality of Metals, School of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP, Brazil
| | - Mariana Macedo
- Federal University of Jequitinhonha e Mucuri Valleys, Teófilo Otoni, Brazil
| | - Laszlo Hegedüs
- Department of Endocrinology and Metabolism, University of Southern Denmark, Odense, 5000, Denmark
| | - Helton Estrela Ramos
- Postgraduate Program in Interactive Processes of Organs and Systems, Health & Science Institute, Federal University of Bahia, Salvador, BA, Brazil.
- Bioregulation Department, Health and Science Institute, Federal University of Bahia, Salvador, BA, Brazil.
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Dos Santos M, Veneziani Y, Muccillo-Baisch AL, Da Silva Júnior FMR. Global survey of urinary selenium in children: A systematic review. J Trace Elem Med Biol 2019; 56:1-5. [PMID: 31442946 DOI: 10.1016/j.jtemb.2019.07.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Selenium (Se) is an essential element in the human body that plays an important role in numerous fundamental physiological functions. However, the distribution of Se in the environment varies widely resulting in this element being available in a large concentration range in the ecosystem, and thus, in the human body. Urinary Se is a biomarker considered to be involved in adaptive mechanisms that help prevent health problems. OBJECTIVES The purpose of the present study was to conduct a systematic review to identify studies reporting the status of urinary Se in healthy children and create a global map. METHODS A literature search was conducted using MEDLINE (United States National Library of Medicine), Web of Science, Toxicology Bibliographic Information (TOXLINE), Latin-American and Caribbean Literature on Health Sciences (LILACS), and the grey literature. This study was registered in PROSPERO (international prospective register of systematic reviews) and was conducted in accordance with the PRISMA guidelines. RESULTS We identified 322 relevant articles, out of which 15 were included in this systematic review. The study identified a total of 4038 healthy children worldwide with urinary Se concentrations from 7.7 to 145.0 μg/L. CONCLUSION This is a pioneering study that provides evidence for the presence of Se in the urine of healthy children; we have shown that the available data is restricted to a small number of individuals and specific groups. Furthermore, there is a lack of information on urinary Se, especially in Latin America, Africa, and Asia.
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Affiliation(s)
- Marina Dos Santos
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil.
| | - Yuri Veneziani
- Programa de Pós-graduação em Geografia Física, Departamento de Geografia, Universidade de São Paulo, São Paulo, Brazil.
| | - Ana Luíza Muccillo-Baisch
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil; Laboratório de Ensaios Farmacológicos e Toxicológicos, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil.
| | - Flávio Manoel Rodrigues Da Silva Júnior
- Programa de Pós-graduação em Ciências Da Saúde, Faculdade de Medicina, Universidade Federal do Rio Grande, Rio Grande, Brazil; Laboratório de Ensaios Farmacológicos e Toxicológicos, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Rio Grande, Brazil.
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