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Zhou W, Si J, Han X, Zheng W, Li X, Zhu C, Zang J. Iodine Status of Infants and Toddlers under 2 Years of Age and Its Association with Feeding Behaviors and Maternal Iodine Status in Shanghai: A Quantile Regression Analysis. Nutrients 2024; 16:1686. [PMID: 38892618 PMCID: PMC11174867 DOI: 10.3390/nu16111686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/16/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
It is crucial to provide adequate iodine nutrition to infants and toddlers for proper thyroid function and subsequent brain development. Infants are particularly vulnerable to iodine deficiency during the transition from a milk-based diet (breast milk and/or infant formula) to solid food. This study examines the current iodine levels of children during their first two years of life and investigates the association between these levels and feeding behaviors and the iodine status of their mothers in Shanghai, a city located in eastern China. A hospital-based cohort study was conducted to enroll mother-child pairs, where the child is aged 6-23 months, who visited community health service centers in the 16 districts of Shanghai, China. Data on socio-demographic factors and feeding behavior data were collected from the participants. The urinary iodine concentration (UIC) in both the young children and their mothers were analyzed. A total of 2282 mother-child pairs were included in this analysis. The median (p25-p75) UIC for lactating women, weaning women, and children were 121.3 μg/L (68.1-206.4 μg/L), 123.4 μg/L (58.4-227.2 μg/L), and 152.1 μg/L (75.8-268.3 μg/L), respectively. The UIC in children was found to be higher than that in their mothers (p < 0.001). Children who consumed less than 500 mL per day of formula milk in the last week had lower UICs compared with those who consumed 500 mL per day or more (p = 0.026). Furthermore, the children's UIC was positively correlated with the maternal UIC (rs = 0.285, p < 0.001). Multiple quantile regression analysis revealed a statistically significant positive association between maternal UIC and children's UIC between the 0.1 and 0.9 quantiles (all p < 0.001). We found that the iodine status of infants and toddlers, as well as of mothers, was sufficient. However, a large minority of children and mothers may be at risk of iodine deficiency. Furthermore, no associations between children's UIC and feeding behaviors were observed. Moreover, there was a positive correlation between the UIC of young children and their mothers.
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Affiliation(s)
- Wei Zhou
- Department of School and Nutrition, Shanghai Yangpu District Center for Disease Control and Prevention, Shanghai 200090, China
| | - Jingyi Si
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Xue Han
- General Office, Shanghai Yangpu District Center for Disease Control and Prevention, Shanghai 200090, China
| | - Weiwei Zheng
- Department of School and Nutrition, Shanghai Yangpu District Center for Disease Control and Prevention, Shanghai 200090, China
| | - Xiangting Li
- Department of School and Nutrition, Shanghai Yangpu District Center for Disease Control and Prevention, Shanghai 200090, China
| | - Changfeng Zhu
- Department of Gastroenterology and Hepatology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jiajie Zang
- Division of Health Risk Factors Monitoring and Control, Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200336, China
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Alsaeedi EE, Rose P, Welham SJM. Salivary iodide status as a measure of whole body iodine homoeostasis? Br J Nutr 2024; 131:1740-1753. [PMID: 38287697 PMCID: PMC11063662 DOI: 10.1017/s000711452400031x] [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: 10/20/2023] [Revised: 01/09/2024] [Accepted: 01/23/2024] [Indexed: 01/31/2024]
Abstract
Iodine is a trace element required to produce the thyroid hormones, which are critical for development, growth and metabolism. To ensure appropriate population iodine nutrition, convenient and accurate methods of monitoring are necessary. Current methods for determining iodine status either involve a significant participant burden or are subject to considerable intra-individual variation. The continuous secretion of iodide in saliva potentially permits its use as a convenient, non-invasive assessment of status in populations. To assess its likely effectiveness, we reviewed studies analysing the association between salivary iodide concentration (SIC) and dietary iodine intake, urinary iodide concentration (UIC) and/or 24-h urinary iodide excretion (UIE). Eight studies conducted in different countries met the inclusion criteria, including data for 921 subjects: 702 healthy participants and 219 with health conditions. SIC correlated positively with UIC and/or UIE in four studies, with the strength of relationship ranging from r = 0·19 to r = 0·90 depending on sampling protocol, age, and if salivary values were corrected for protein concentration. Additionally, SIC positively correlated with dietary intake, being strongest when saliva was collected after dinner. SIC varied with external factors, including thyroid function, use of some medications, smoking and overall health status. Evidence provided here supports the use of SIC as a viable, low-burden method for determining iodine status in populations. However, small sample sizes and high variability indicates the need for more extensive analyses across age groups, ethnicities, disease states and dietary groups to clarify the relative accuracy and reliability in each case and standardise procedure.
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Affiliation(s)
- Eatedal Eenizan Alsaeedi
- University of Nottingham, School of Biosciences, Division of Food, Nutrition & Dietetics, Loughborough, LeicestershireLE12 5RD, UK
- University of Hafr Al Batin, College of Applied Medical Sciences, Division of Clinical Nutrition, Hafr Al Batin, Saudi Arabia
| | - Peter Rose
- University of Nottingham, School of Biosciences, Division of Food, Nutrition & Dietetics, Loughborough, LeicestershireLE12 5RD, UK
| | - Simon J. M. Welham
- University of Nottingham, School of Biosciences, Division of Food, Nutrition & Dietetics, Loughborough, LeicestershireLE12 5RD, UK
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Yu S, Ge Y, Zhang L, Li Y, Zhang W, Liu C, Peng S. Dietary exposure assessment of perchlorate and chlorate in infant formulas marketed in Shanghai, China. SCIENCE IN ONE HEALTH 2024; 3:100062. [PMID: 39077390 PMCID: PMC11262295 DOI: 10.1016/j.soh.2024.100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/19/2024] [Indexed: 07/31/2024]
Abstract
Perchlorate and chlorate are ubiquitous pollutants that can adversely affect the thyroid function in humans. This study assessed the potential health risks associated with the dietary exposure of infants and young children to perchlorate and chlorate present in infant formulas available in Shanghai. The assessment was based on risk monitoring data from 150 samples of infant formulas in Shanghai between 2020 and 2022, along with the dietary consumption data of infants and young children. The detection rates of perchlorate and chlorate in infant formulas were 46.0% and 98.7%, with mean contents of 9.98 μg/kg and 112.01 μg/kg, and the maximum values of 151.00 μg/kg and 1475.00 μg/kg, respectively. The mean and 95th percentile (P 95) values of daily perchlorate exposure of 0-36-month-old infant and young children via infant formulas were 0.07 and 0.17 μg/kg body weight (bw) per day, respectively, which were lower than the tolerable daily intake (TDI) of perchlorate (0.3 μg/kg bw per day). The mean and P 95 values of chlorate exposure via infant formulas in 0-36-month-old infants and young children were 0.83 and 1.89 μg/kg bw per day, which were lower than the TDI of chlorate (3 μg/kg bw per day). The P 95 exposure of different age groups (0-6 months, 7-12 months and 13-36 months) of infants and young children to perchlorate and chlorate in infant formulas was below the TDI. Therefore, the risk associated with the exposure of 0-36-month-old infants and young children to perchlorate and chlorate from infant formulas in Shanghai is considered acceptable. Prioritizing environmental pollution control efforts to reduce the levels of perchlorate and chlorate in food products is important to safeguard the health of the infants and children under the One Health concept.
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Affiliation(s)
- Shenghao Yu
- Information Application Research Center of Shanghai Municipal Administration for Market Regulation, Shanghai 200030, China
| | - Yonghui Ge
- Information Application Research Center of Shanghai Municipal Administration for Market Regulation, Shanghai 200030, China
| | - Lujing Zhang
- Information Application Research Center of Shanghai Municipal Administration for Market Regulation, Shanghai 200030, China
| | - Yiqi Li
- Information Application Research Center of Shanghai Municipal Administration for Market Regulation, Shanghai 200030, China
| | - Wen Zhang
- Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China
| | - Chang Liu
- Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Shaojie Peng
- Information Application Research Center of Shanghai Municipal Administration for Market Regulation, Shanghai 200030, China
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Guo H, Zong S, Yong L, Jiang Y, Qin L, Zhou L, Ren Q, Gao X, Kang F, Huang W, Chen J, Zhang L. The association between perchlorate in drinking water and height and weight of children and adolescents in Southwest China: a retrospective cross-sectional study. Front Public Health 2023; 11:1260612. [PMID: 37860794 PMCID: PMC10582749 DOI: 10.3389/fpubh.2023.1260612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/20/2023] [Indexed: 10/21/2023] Open
Abstract
Objective To investigate the association between the concentration of perchlorate in drinking water and the height and weight of children and adolescents in Sichuan Province. Methods Perchlorate in the drinking water of 24 counties in Sichuan Province from 2021 to 2022 was detected and analyzed, 66 drinking water samples were collected, and the content of perchlorate in drinking water during the wet season and dry season was detected by ultra-high performance liquid chromatography in series. The linear mixed effect model was used to estimate the relationship between perchlorate in drinking water and the height and weight of 144,644 children and adolescents, and 33 pieces of local average wage data were used as confounding factors for quality control. Results After controlling the age, gender, and local economic situation, we found that the concentration of perchlorate in drinking water increased by 10 μg/L is associated with a 1.0 cm decrease in height and a 1.6 kg decrease in weight in children and adolescents (p < 0.05). Conclusion The concentration of perchlorate in drinking water may be negatively correlated with the height and weight of children.
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Affiliation(s)
- Hongyu Guo
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Shimiao Zong
- School of Public Health, Chengdu Medical College, Chengdu, China
| | - Li Yong
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Yang Jiang
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Ling Qin
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Liang Zhou
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Qiaoqiao Ren
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Xufang Gao
- Chengdu Center for Disease Control and Prevention, Chengdu, China
| | - Fayang Kang
- Guangyuan Center for Disease Control and Prevention, Guangyuan, China
| | - Wei Huang
- Zigong Center for Disease Control and Prevention, Zigong, China
| | - Jianyu Chen
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
| | - Li Zhang
- Sichuan Provincial Center for Disease Control and Prevention, Chengdu, China
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Pang J, Huang Y, Liu Y, Huang W. Applications of ion chromatography in urine analysis: A review. J Chromatogr A 2023; 1706:464231. [PMID: 37517316 DOI: 10.1016/j.chroma.2023.464231] [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: 06/07/2023] [Revised: 07/17/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
Ion chromatography (IC) plays a crucial role in urine analysis for diverse medical diagnoses. This paper reviews a comprehensive investigation into urine pretreatment techniques, as well as the design and development of IC systems for the measurement of various chemicals. Prior to analysis, urine samples commonly undergo pretreatment procedures such as dilution, filtration, purification, and concentration. These steps effectively eliminate interfering factors and facilitate the accurate and sensitive analysis of ultra-trace components. To separate and quantify different chemical elements or ions present in urine, a range of homemade or commercially available columns coupled with various detectors were employed. This study focuses on the analysis of chemicals such as heavy metals, halogens, pesticides, drugs, and other essential or toxic substances by IC methods.
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Affiliation(s)
- Jiafeng Pang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430078, Hubei, China
| | - Yongming Huang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430078, Hubei, China
| | - Yanli Liu
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430078, Hubei, China
| | - Weixiong Huang
- Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430078, Hubei, China.
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Qin Y, Cifelli CJ, Agarwal S, Fugoni VL. Dairy food consumption is beneficially linked with iodine status in US children and adults: National Health and Nutrition Examination Surveys 2001-2018. Public Health Nutr 2023; 26:1828-1839. [PMID: 37092715 PMCID: PMC10478070 DOI: 10.1017/s136898002300071x] [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: 04/20/2022] [Revised: 02/06/2023] [Accepted: 04/01/2023] [Indexed: 04/25/2023]
Abstract
OBJECTIVES The objective of this study was to determine the association between the consumption of dairy foods with urinary iodine concentration (UIC) and iodine deficiency risk in a nationally representative sample of the US population. DESIGN, SETTING AND PARTICIPANTS 24-hour dietary recall data and laboratory data for UIC (μg/l) from subjects 2+ years old US population participating in National Health and Nutrition Examination Surveys 2001-2018 were used (n 26 838) for analyses after adjusting for demographic covariates. Significant associations were assessed at P < 0·05. RESULTS Mean intakes of total dairy were 2·21, 2·17 and 1·70 cup equivalents (cup eq) among those 2-8, 9-18 and 19+ years, respectively. Of the dairy components, intake of milk was highest followed by cheese and yogurt for all age groups. Total dairy intakes were positively associated with UIC among those 2-8 years (β = 29·9 ± 9·9 μg/l urine/cup eq dairy) and 9-18 years (β = 26·0 ± 4·8 μg/l urine/cup eq dairy) but not associated among those 19+ years. Total dairy intakes were associated with lowered risks (30 %, 21 % and 20 % for among 2-8, 9-18 and 19+ years, respectively) of being classified as iodine insufficient (UIC < 100 μg/l) or lowered risk (47 %, 30 % and 26 % among 2-8, 9-18 and 19+ years, respectively) of being classified as iodine severely deficient (UIC < 20 μg/l). CONCLUSIONS The results indicate that dairy foods are beneficially associated with UIC and lowered iodine deficiency risk.
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Affiliation(s)
- Yue Qin
- Department of Nutrition Science, Purdue University, West Lafayette, IN47906, USA
| | | | - Sanjiv Agarwal
- NutriScience LLC, 901 Heatherwood Drive, East Norriton, PA19403, USA
| | - Victor L Fugoni
- Nutrition Impact, LLC, 9725 D Drive North, Battle Creek, MI49014, USA
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McCarthy WP, Srinivas M, Danaher M, Connor CO, Callaghan TFO, van Sinderen D, Kenny J, Tobin JT. Isolation and identification of chlorate-reducing Hafnia sp. from milk. MICROBIOLOGY (READING, ENGLAND) 2023; 169:001347. [PMID: 37450378 PMCID: PMC10433419 DOI: 10.1099/mic.0.001347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 05/31/2023] [Indexed: 07/18/2023]
Abstract
Chlorate has become a concern in the food and beverage sector, related to chlorine sanitizers in industrial food production and water treatment. It is of particular concern to regulatory bodies due to the negative health effects of chlorate exposure. This study investigated the fate of chlorate in raw milk and isolated bacterial strains of interest responsible for chlorate breakdown. Unpasteurized milk was demonstrated to have a chlorate-reducing capacity, breaking down enriched chlorate to undetectable levels in 11 days. Further enrichment and isolation using conditions specific to chlorate-reducing bacteria successfully isolated three distinct strains of Hafnia paralvei. Chlorate-reducing bacteria were observed to grow in a chlorate-enriched medium with lactate as an electron donor. All isolated strains were demonstrated to reduce chlorate in liquid medium; however, the exact mechanism of chlorate degradation was not definitively identified in this study.
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Affiliation(s)
- William P. McCarthy
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
- School of Food Science and Environmental Health, Technological University Dublin, Grangegorman, Dublin 7, Ireland
| | - Meghana Srinivas
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Martin Danaher
- Food Safety Department, Teagasc Food Research Centre, Ashtown, Dublin 15, Ireland
| | - Christine O. Connor
- School of Food Science and Environmental Health, Technological University Dublin, Grangegorman, Dublin 7, Ireland
| | - Tom F. O. Callaghan
- School of Food and Nutritional Sciences, University College Cork, Cork, Ireland
| | - Douwe van Sinderen
- School of Microbiology, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - John Kenny
- Food Biosciences Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
- VistaMilk Science Foundation Ireland Research Centre, Teagasc, Moorepark, Fermoy, Cork, Ireland
| | - John T. Tobin
- Food Chemistry and Technology Department, Teagasc Food Research Centre, Moorepark, Fermoy, Cork, Ireland
- VistaMilk Science Foundation Ireland Research Centre, Teagasc, Moorepark, Fermoy, Cork, Ireland
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Severe Hypothyroidism and Large Goiter due to Iodine Deficiency in an Adolescent Male in the United States: A Case Report and Review of the Literature. Case Rep Endocrinol 2022; 2022:7235102. [PMID: 36387937 PMCID: PMC9646315 DOI: 10.1155/2022/7235102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
Acquired hypothyroidism due to iodine deficiency is extremely rare in the United States due to the introduction of table salt iodization in the 1920s (Leung et al., 2012). We present the case of an adolescent male with a history of mild autism spectrum disorder and an extremely restrictive diet who was found to have iodine deficiency as the etiology for his rapidly enlarging goiter and antibody-negative hypothyroidism. Thyroid-stimulating hormone (TSH) was 416 μIU/mL (0.350–5.500 μIU/mL), free thyroxine (T4) was <0.1 ng/dL (0.80–1.80 ng/dL), and triiodothyronine (T3) was 41 ng/dL (82–213 mg/dL) at diagnosis. The patient's 24-hour urinary iodine was undetectable. He was started on iodine supplementation with rapid visible improvement of goiter within two weeks and normalization of thyroid function tests within four weeks. Thorough dietary history and nutritional screening are important in cases of acquired hypothyroidism and/or goiter. Alternatively, diets that are low in iodized salt, dairy, bread, and seafood should raise concern for iodine deficiency, and patients with suspected or proven iodine deficiency should be screened for hypothyroidism.
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Kordas K, Cantoral A, Desai G, Halabicky O, Signes-Pastor AJ, Tellez-Rojo MM, Peterson KE, Karagas MR. Dietary Exposure to Toxic Elements and the Health of Young Children: Methodological Considerations and Data Needs. J Nutr 2022; 152:2572-2581. [PMID: 36774123 PMCID: PMC10157815 DOI: 10.1093/jn/nxac185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 08/03/2022] [Accepted: 08/15/2022] [Indexed: 12/16/2022] Open
Abstract
Concerns have been raised regarding toxic-element (arsenic, cadmium, lead, and mercury) contamination of commercially available infant foods around the world. Young children are vulnerable to the effects of toxic elements, based on higher absorption levels and potentially poorer detoxification capacities. Toxic-element exposures in early life exact high societal costs, but it is unclear how much dietary exposure to these elements contributes to adverse health outcomes. Well-designed epidemiological studies conducted in different geographical and socioeconomic contexts need to estimate dietary toxicant exposure in young children and to determine whether causal links exist between toxicants in children's diets and health outcomes. This commentary outlines the methodological considerations and data needs to advance such research.
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Affiliation(s)
- Katarzyna Kordas
- Department of Epidemiology and Environmental Health, University at Buffalo, Buffalo NY, USA.
| | | | - Gauri Desai
- Department of Epidemiology and Environmental Health, University at Buffalo, Buffalo NY, USA
| | - Olivia Halabicky
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Antonio J Signes-Pastor
- Unidad de Epidemiología de la Nutrición, Universidad Miguel Hernández, Alicante, Spain; Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III (ISCIII), Madrid, Spain; Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL), Alicante, Spain
| | - Martha M Tellez-Rojo
- Center for Nutrition and Health Research, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Karen E Peterson
- Department of Nutritional Sciences, University of Michigan, Ann Arbor, MI, USA; Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
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10
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Integration of probabilistic exposure assessment and risk characterization for perchlorate in infant formula and supplementary food. Food Chem Toxicol 2022; 168:113347. [PMID: 35932970 DOI: 10.1016/j.fct.2022.113347] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/26/2022] [Accepted: 07/31/2022] [Indexed: 11/23/2022]
Abstract
Infants are the primary susceptible population to perchlorate exposure-related adverse health effects, while information on their dietary intake of perchlorate via infant food remains limited. This study determined perchlorate in six categories of baby food commodities commonly consumed by 0-36 months infants. A probabilistic approach with Monte Carlo simulation was used to estimate perchlorate's daily intake (EDI) considering uncertainty and variability. Results showed that the average perchlorate concentration in infant food ranged from 3.42 to 22.26 μg/kg. The mean (SD) EDIs of perchlorate were 0.42(0.20), 0.62(0.20), and 0.46(0.14) μg/kg-bw/day for 0-6, 7-12, and 13-36-months infants, respectively. Infant formula was the major contributor (34%-74%) to EDIs of perchlorate in all age groups. Probabilistic risk characterization showed the cumulative probability of EDIs exceeding the RfD (0.70 μg/kg-bw/day) were 6.5%, 37.9%, and 4.5% for 0-6, 7-12, and 13-36-months infants, respectively. The cumulative risk of perchlorate exposure from different infant food intake should be noted.
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Petersen AM, Small CM, Yan Y, Wilson C, Batzel P, Bremiller RA, Buck CL, von Hippel FA, Cresko WA, Postlethwait JH. Evolution and developmental expression of the sodium-iodide symporter ( NIS, slc5a5) gene family: Implications for perchlorate toxicology. Evol Appl 2022; 15:1079-1098. [PMID: 35899258 PMCID: PMC9309457 DOI: 10.1111/eva.13424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 11/27/2022] Open
Abstract
The vertebrate sodium-iodide symporter (NIS or SLC5A5) transports iodide into the thyroid follicular cells that synthesize thyroid hormone. The SLC5A protein family includes transporters of vitamins, minerals, and nutrients. Disruption of SLC5A5 function by perchlorate, a pervasive environmental contaminant, leads to human pathologies, especially hypothyroidism. Perchlorate also disrupts the sexual development of model animals, including threespine stickleback (Gasterosteus aculeatus) and zebrafish (Danio rerio), but the mechanism of action is unknown. To test the hypothesis that SLC5A5 paralogs are expressed in tissues necessary for the development of reproductive organs, and therefore are plausible candidates to mediate the effects of perchlorate on sexual development, we first investigated the evolutionary history of Slc5a paralogs to better understand potential functional trajectories of the gene family. We identified two clades of slc5a paralogs with respect to an outgroup of sodium/choline cotransporters (slc5a7); these clades are the NIS clade of sodium/iodide and lactate cotransporters (slc5a5, slc5a6, slc5a8, slc5a8, and slc5a12) and the SGLT clade of sodium/glucose cotransporters (slc5a1, slc5a2, slc5a3, slc5a4, slc5a10, and slc5a11). We also characterized expression patterns of slc5a genes during development. Stickleback embryos and early larvae expressed NIS clade genes in connective tissue, cartilage, teeth, and thyroid. Stickleback males and females expressed slc5a5 and its paralogs in gonads. Single-cell transcriptomics (scRNA-seq) on zebrafish sex-genotyped gonads revealed that NIS clade-expressing cells included germ cells (slc5a5, slc5a6a, and slc5a6b) and gonadal soma cells (slc5a8l). These results are consistent with the hypothesis that perchlorate exerts its effects on sexual development by interacting with slc5a5 or its paralogs in reproductive tissues. These findings show novel expression domains of slc5 genes in stickleback and zebrafish, which suggest similar functions across vertebrates including humans, and provide candidates to mediate the effects of perchlorate on sexual development.
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Affiliation(s)
- Ann M. Petersen
- Department of Biology, Institute of Ecology and EvolutionUniversity of OregonEugeneOregonUSA
- J.J. Howard Marine Lab, Northeast Fisheries Science CenterNational Oceanographic and Atmospheric AdministrationSandy HookNew JerseyUSA
| | - Clayton M. Small
- Department of Biology, Institute of Ecology and EvolutionUniversity of OregonEugeneOregonUSA
| | - Yi‐Lin Yan
- Department of Biology, Institute of NeuroscienceUniversity of OregonEugeneOregonUSA
| | - Catherine Wilson
- Department of Biology, Institute of NeuroscienceUniversity of OregonEugeneOregonUSA
| | - Peter Batzel
- Department of Biology, Institute of NeuroscienceUniversity of OregonEugeneOregonUSA
| | - Ruth A. Bremiller
- Department of Biology, Institute of NeuroscienceUniversity of OregonEugeneOregonUSA
| | - C. Loren Buck
- Department of Biological SciencesNorthern Arizona UniversityFlagstaffArizonaUSA
| | - Frank A. von Hippel
- Department of Community, Environment & Policy, Mel & Enid Zuckerman College of Public HealthUniversity of ArizonaTucsonArizonaUSA
| | - William A. Cresko
- Department of Biology, Institute of Ecology and EvolutionUniversity of OregonEugeneOregonUSA
| | - John H. Postlethwait
- Department of Biology, Institute of NeuroscienceUniversity of OregonEugeneOregonUSA
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King L, Huang Y, Li T, Wang Q, Li W, Shan Z, Yin J, Chen L, Wang P, Dun C, Zhuang L, Peng X, Liu L. Associations of urinary perchlorate, nitrate and thiocyanate with central sensitivity to thyroid hormones: A US population-based cross-sectional study. ENVIRONMENT INTERNATIONAL 2022; 164:107249. [PMID: 35468408 DOI: 10.1016/j.envint.2022.107249] [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: 07/12/2021] [Revised: 03/10/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Perchlorate, nitrate, and thiocyanate are three well-known sodium iodine symporter inhibitors, however, associations of their individual and concurrent exposure with central thyroid hormones sensitivity remain unclear. OBJECTIVES To investigate the associations of urinary perchlorate, nitrate, thiocyanate, and their co-occurrence with central thyroid hormones sensitivity among US general adults. METHODS A total of 7598 non-pregnant adults (weighted mean age 45.9 years and 52.9% men) from National Health and Nutritional Examination Survey 2007-2012 were included in this cross-sectional study. Central sensitivity to thyroid hormones was estimated with the Parametric Thyroid Feedback Quantile-based Index (PTFQI). Ordinary least-squares regression, weighted quantile sum (WQS) regression, and Bayesian kernel machine regression (BKMR) models were performed to examine the associations of three anions and their co-occurrence with PTFQI. RESULTS The weighted mean values of urinary perchlorate, nitrate, thiocyanate, and perchlorate equivalent concentration (PEC) were 5.48 μg/L, 57.59 mg/L, 2.65 mg/L, and 539.8 μg/L, respectively. Compared with the lowest quartile, the least-square means difference (LSMD) of PTFQI was -0.0516 (LSMD ± SE: -0.0516 ± 0.0185, P < 0.01) in the highest perchlorate quartile. On average, PTFQI decreased by 0.0793 (LSMD ± SE: -0.0793 ± 0.0205, P < 0.001) between the highest and lowest thiocyanate quartile. Compared with those in the lowest quartile, participants in the highest PEC quartile had significantly decreased PTFQI levels (LSMD ± SE: -0.0862 ± 0.0188, P < 0.001). The WQS of three goitrogens, was inversely associated with PTFQI (β: -0.051, 95% CI: -0.068, -0.034). In BKMR model, PTFQI significantly decreased when the levels of three anions were at or above their 60th percentiles compared to the median values. CONCLUSIONS Higher levels of urinary perchlorate, thiocyanate, and co-occurrence of three goitrogens were associated with increased central thyroid hormones sensitivity among US general adults. Further studies are warranted to replicate our results and elucidate the underlying causative mechanistic links.
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Affiliation(s)
- Lei King
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yue Huang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Li
- Institute of Statistics and Big Data, Renmin University of China, Beijing, China
| | - Qiang Wang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wanyi Li
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhilei Shan
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiawei Yin
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liangkai Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pei Wang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Changchang Dun
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Litao Zhuang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaolin Peng
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; Department of Non-communicable Disease Prevention and Control, Shenzhen Nanshan Center for Chronic Disease Control, Shenzhen, China.
| | - Liegang Liu
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Pehrsson PR, Roseland JM, Patterson KY, Phillips KM, Spungen JH, Andrews KW, Gusev PA, Gahche JJ, Haggans CJ, Merkel JM, Ershow AG. Iodine in foods and dietary supplements: A collaborative database developed by NIH, FDA and USDA. J Food Compost Anal 2022; 109. [DOI: 10.1016/j.jfca.2021.104369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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Iodine Concentrations in Conventional and Organic Milk in the Northeastern U.S. DAIRY 2022. [DOI: 10.3390/dairy3020017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Milk is a major source of dietary iodine in the United States. Due to a relatively low margin of safety for iodine intake, there are concerns for both deficiency and over-exposure. Iodine concentrations of raw milk samples from farms and retail milk in the Northeastern U.S. region were compared between seasons (winter vs. summer) and farming practices (conventional vs. organic). Overall, mean iodine concentration was 46.2% higher in raw milk from conventional farms vs. organic farms. An interaction effect between season and farming practices was observed. Organic raw milk had higher iodine content in the winter than in the summer (423 ± 54 μg/L vs. 273 ± 24 μg/L), whereas conventional raw milk had higher iodine content in the summer than in the winter (618 ± 75 μg/L vs. 398 ± 27 μg/L). Milk samples from conventional farms had 2.27-fold higher average iodine concentration compared to milk coming from organic farms in the summer but did not differ in the winter. Out of 68 and 98 raw milk samples originating from conventional and organic farms, 22 (32.4%) and 19 (19.4%) respectively, had iodine concentrations > 500 µg/L, reaching as high as 1928 μg/L. In contrast, the overall mean concentration of iodine in retail milk did not differ between conventional and organic milk (345 ± 23 vs. 320 ± 42 μg/L, respectively). The current study confirms dairy milk remains to be a good source of iodine to U.S. consumers. However, dairy farms should be aware of the potential adverse health effects of excess iodine intake. Careful considerations in dairy management may be necessary to not exceed the recommended level of iodine supplementation in both conventional and organic operations at the farm level—to maintain optimal iodine concentrations in retail fluid milk accessible to the consumers.
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15
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Li M, Xiao M, Xiao Q, Chen Y, Guo Y, Sun J, Li R, Li C, Zhu Z, Qiu H, Liu X, Lu S. Perchlorate and chlorate in breast milk, infant formulas, baby supplementary food and the implications for infant exposure. ENVIRONMENT INTERNATIONAL 2022; 158:106939. [PMID: 34673317 DOI: 10.1016/j.envint.2021.106939] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/08/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Perchlorate and chlorate are ubiquitous pollutants in various types of foodstuffs, drinking water and environmental compartments. They have raised great concerns due to potential adverse effects on human thyroid functions. Dietary intake is considered as the predominant pathway for human exposure to perchlorate and chlorate. Nevertheless, data on human exposure to the chemicals above remain limited, particularly for the most vulnerable populations such as infants. In the present study, 62 breast milks, 53 infant formulas, 88 baby supplementary food and 50 tap water samples were collected in South China and the levels of perchlorate and chlorate were measured in these samples. Perchlorate and chlorate were frequently detected in more than 90% of measured samples. In these different types of samples, the median concentrations of perchlorate were 0.65 μg/L, 0.61 μg/kg, 0.56 μg/kg and 1.18 μg/L, respectively, while the median concentrations of chlorate were 1.73 μg/L, 2.48 μg/kg, 2.67 μg/kg and non-detected, respectively. Health risk assessment using hazard quotient suggested that perchlorate and chlorate exposure in the sampled baby food are not expected to increase the risk of an adverse health effect. To our knowledge, this is the first study simultaneously investigating perchlorate and chlorate exposure in Chinese infants via food intake.
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Affiliation(s)
- Minhui Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Minhua Xiao
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Qinru Xiao
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Yining Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Yichen Guo
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Jing Sun
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Rong Li
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Chun Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China
| | - Zhou Zhu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Hongmei Qiu
- Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Xihong Liu
- Department of Clinical Nutrition, Guangzhou Women and Children's Medical Centre, Guangzhou, China.
| | - Shaoyou Lu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, China.
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16
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Yao Q, Yan SA, Liu W, Huang M, Lin Q. Perchlorate contamination of tea leaves and a corresponding probabilistic dietary risk assessment using Monte Carlo simulation. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 39:341-350. [PMID: 34913854 DOI: 10.1080/19440049.2021.2005262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Perchlorate is known as a thyroid disrupter. Its contamination in various tea samples was monitored, and 286 samples belonging to four types of tea leaves were analysed. The detection rate of perchlorate in tea was 99.3%. The mean concentration in different tea types decreased in order from green tea, oolong tea, white tea to black tea. A probabilistic approach was performed to evaluate the dietary exposure of perchlorate for six different subpopulations. The daily intakes (EDIs) for consumers over the age of 41 were higher than that of other subpopulations. The hazard quotient for six groups was lower than 1 even at the extreme percentile (P99). It indicates that the risk of dietary exposure to perchlorate from tea consumption for Fujian people is acceptable without considering other foodstuffs. However, the high occurrence of perchlorate in tea samples suggested that the actual source of this contaminant should be further investigated.
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Affiliation(s)
- Qinghua Yao
- Fujian Key Laboratory of Agro-Products Quality and Safety, Institute of Quality Standards Testing Technology for Agro-products, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Sun-An Yan
- Fujian Key Laboratory of Agro-Products Quality and Safety, Institute of Quality Standards Testing Technology for Agro-products, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Wenjing Liu
- Fujian Key Laboratory of Agro-Products Quality and Safety, Institute of Quality Standards Testing Technology for Agro-products, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Minmin Huang
- Fujian Key Laboratory of Agro-Products Quality and Safety, Institute of Quality Standards Testing Technology for Agro-products, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Qiu Lin
- Fujian Key Laboratory of Agro-Products Quality and Safety, Institute of Quality Standards Testing Technology for Agro-products, Fujian Academy of Agricultural Sciences, Fuzhou, China
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17
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Minicozzi MR, Axlid EG, von Hippel FA, Espinoza J, Funke A, Phillips QP, Buck CL. Perchlorate exposure does not induce obesity or non-alcoholic fatty liver disease in zebrafish. PLoS One 2021; 16:e0254500. [PMID: 34347796 PMCID: PMC8336815 DOI: 10.1371/journal.pone.0254500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/28/2021] [Indexed: 12/31/2022] Open
Abstract
Perchlorate is a water-soluble contaminant found throughout the United States and many other countries. Perchlorate competitively inhibits iodide uptake at the sodium/iodide symporter, reducing thyroid hormone synthesis, which can lead to hypothyroidism and metabolic syndromes. Chronic perchlorate exposure induces hepatic steatosis and non-alcoholic fatty liver disease (NAFLD) in developing threespine stickleback (Gasterosteus aculeatus). We hypothesized that perchlorate would also induce zebrafish (Danio rerio) to develop phenotypes consistent with NAFLD and to accumulate lipids throughout the body. We exposed zebrafish embryos to four concentrations of perchlorate treated water (10μg/L, 10mg/L, 30mg/L, and 100mg/L) and a control (0mg/L) over the course of 133 days. Adult zebrafish were euthanized, sectioned, H&E and Oil Red-O stained, and analyzed for liver morphology and whole body lipid accumulation. In a representative section of the liver, we counted the number of lipid droplets and measured the area of each droplet and the total lipid area. For whole body analysis, we calculated the ratio of lipid area to body area within a section. We found that zebrafish exposed to perchlorate did not differ in any measured liver variables or whole body lipid area when compared to controls. In comparison to stickleback, we see a trend that control stickleback accumulate more lipids in their liver than do control zebrafish. Differences between the species indicate that obesogenic effects due to perchlorate exposure are not uniform across fish species, and likely are mediated by evolutionary differences related to geographic location. For example, high latitude fishes such as stickleback evolved to deposit lipid stores for over-winter survival, which may lead to more pronounced obesogenic effects than seen in tropical fish such as zebrafish.
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Affiliation(s)
- Michael R. Minicozzi
- Department of Biological Sciences, Minnesota State University Mankato, Mankato, MN, United States of America
| | - Erik G. Axlid
- Department of Biological Sciences, Minnesota State University Mankato, Mankato, MN, United States of America
| | - Frank A. von Hippel
- Department of Community, Environment and Policy, The University of Arizona, Tucson, AZ, United States of America
| | - Joseph Espinoza
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Aubrey Funke
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States of America
| | - Quentin P. Phillips
- Department of Biological Sciences, Minnesota State University Mankato, Mankato, MN, United States of America
| | - C. Loren Buck
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States of America
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18
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Studies on perchlorate levels in powdered infant formulas available on the Polish market. CURRENT ISSUES IN PHARMACY AND MEDICAL SCIENCES 2021. [DOI: 10.2478/cipms-2021-0013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abstract
Perchlorate has been acknowledged as a health threat due to its ability to interfere with iodine uptake by the thyroid gland. Infants and developing newborns have been considered as the most vulnerable groups to the perchlorate toxicity. A crucial source of perchlorate ingestion are powdered infant formulas. This study was designed to measure perchlorate content in thirty-one powdered infant formulas available on the Polish market. A rapid and sensitive ion chromatography method – conductivity cell detection – was applied to determine
ClO
4
−
{\rm{ClO}}_4^ -
content. Limit of detection (0.150 µg/L) and limit of quantification (0.450 µg/L) were assessed. Collected samples were classified by the age of consumers: first stage, until the baby is six months old and follow-on formula for older children. Geometric mean of perchlorate concentration of 1.041 µg/L and 0.857 µg/L in the groups of the first stage and follow-on formulas were calculated, respectively. A health risk assessment revealed that the Tolerable Daily Intake (TDI) for perchlorate (0.3 µg/kg body weight/day) was exceeded only in a few milk samples. The findings suggest that perchlorate contamination of powdered infant formulas may not to be an immediate health issue, yet testing for
ClO
4
−
{\rm{ClO}}_4^ -
should continuously be conducted. To the best of our knowledge, this is the first study concerning perchlorate content in infant formulas in Poland.
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19
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Liu X, Zhang H, Tian Y, Fang M, Xu L, Wang Q, Li J, Shen H, Wu Y, Gong Z. Bioavailability Evaluation of Perchlorate in Different Foods In Vivo: Comparison with In Vitro Assays and Implications for Human Health Risk Assessment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:5189-5197. [PMID: 33881845 DOI: 10.1021/acs.jafc.1c00539] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Perchlorate in various foods continuously arouses public health concern. Bioavailability is a critical parameter to better estimate perchlorate exposure from diets. In this study, perchlorate bioavailability in five foods was determined in an in vivo mouse model and compared with in vitro bioaccessibility/bioavailability. The estimated in vivo perchlorate bioavailability for different foods ranged from 18.01 ± 4.53% to 45.60 ± 7.11%, with the order lettuce > pork > rice > milk powder > soybean. Moisture, fiber, and fat in foods were identified as critical factors affecting perchlorate bioavailability (correlation r = 0.71, 0.52, and -0.67, respectively). Linear regression analysis revealed that the in vitro perchlorate bioavailability determined using the Caco-2 cell model has the potential to estimate the in vivo perchlorate bioavailability in foods (R2 = 0.67, slope = 1.33, and y intercept = 4.99). These findings provide insights into the effects of the food matrices on perchlorate bioavailability and could contribute to decrease the uncertainty regarding perchlorate dietary exposure risk assessment.
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Affiliation(s)
- Xin Liu
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Hu Zhang
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Yimei Tian
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Min Fang
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Lin Xu
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Qiao Wang
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Jingguang Li
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, People's Republic of China
| | - Haitao Shen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, Zhejiang, People's Republic of China
| | - Yongning Wu
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, People's Republic of China
| | - Zhiyong Gong
- Key Laboratory for Deep Processing of Major Grain and Oil (The Chinese Ministry of Education), College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
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20
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Sekhon I, Pearce EN, He X, Lee SY. Iodine Content in Meal Replacements in the United States. Endocr Pract 2021; 27:668-672. [PMID: 33705969 DOI: 10.1016/j.eprac.2021.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Iodine is essential for thyroid hormone production. The recommended dietary allowance for iodine in nonpregnant adults is 150 μg/d. However, most product labels do not list the iodine content. Meal replacements are not required to contain specific vitamins and minerals. Nevertheless, they are often marketed as good and convenient sources of a balanced nutrition. In this study, we aimed to assess the iodine content in meal replacements to determine how they may contribute to iodine deficiency or excess. METHODS Twenty seven meal replacements from supermarkets in the Boston area were collected. The iodine concentration of each meal replacement was measured spectrophotometrically. Iodine content in meal replacements were compared according to form (liquid, bar, and powder) and type (vegan and nonvegan). RESULTS The overall mean ± SD iodine content was 49.7 ± 125.4 μg/serving. However, 1 meal replacement was an outlier and had 671.9 μg iodine per serving. Mean iodine content differed between forms and was highest for liquids (mean ± SD: 37.4 ± 6.5 μg/serving). Nonvegan meal replacements had a higher mean iodine content than vegan meal replacements (mean ± SD: 31.6 ± 15.78 μg/serving). CONCLUSION All of the meal replacements contained detectible amounts of iodine regardless of whether it was listed on their labels (41% did not list iodine). Overall, the meal replacements in this study were found to be good sources of iodine. However, consumers should be aware that packaging labels may not accurately reflect the amount of iodine present.
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Affiliation(s)
- Isha Sekhon
- Nutrition and Metabolism, Graduate Medical Sciences, Boston University School of Medicine, Boston
| | - Elizabeth N Pearce
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston
| | - Xuemei He
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston
| | - Sun Y Lee
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston.
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21
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Zhang Z, Lin H, Ma C, Zhang L, Zelevinsky J, Xia M, Xu Y, White JC, Tyson J, He L. Integrating the Gutzeit method with X-Ray fluorescence spectroscopy for rapid quantification of inorganic arsenic in selected beverages. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107588] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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22
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Chen N, Wu S, Zhu Y. An electrodialytic device for automated inorganic anion preconcentration with determination by ion chromatography-conductivity detection. J Chromatogr A 2021; 1638:461898. [PMID: 33486221 DOI: 10.1016/j.chroma.2021.461898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/06/2021] [Accepted: 01/07/2021] [Indexed: 11/29/2022]
Abstract
A 4-layer sandwiched device (4LSD) well suited for coupling to online ion chromatography (IC) systems was described and simultaneously performed target anion enrichment, matrix removal and sample injection within seconds. The basic assembly consisted of an extraction solution channel, a sample solution channel and two electrolyte channels. Cation-exchange resin (CER) was utilized to support the solution chamber, increase electrical conductivity and improve pressure resistance to achieve compatibility with a peristaltic pump. Filter placement ensured loop circulation of the 4LSD and prevented resin leakage. The 4LSD showed comparable performance to that of conventional solid-phase extraction (SPE) pretreatment in terms of matrix interference removal while enabling automation. The applied current, sample/extraction solution flow rate ratio, and initial concentration were discussed and optimized. Controllable 1-40-fold enrichment can be ensured. The migration phenomenon of different anions was discussed. F-, Cl-, NO2-, Br-, NO3-, SO42- and ClO4- exhibited satisfactory linear detection ranges within 2.5-1000 μg·L-1, and the calculated limits of detection (LODs) in milk formula were within the 0.097-0.79 mg·kg-1 range. The 4LSD was successfully applied to the determination of anions in milk formula with good spiked recoveries ranging between 92.54% and 107.2%, except for the NO2- recovery. The relative standard deviations (RSDs) ranged from 0.69% to 8.29%.
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Affiliation(s)
- Ning Chen
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310027, China
| | - Shuchao Wu
- Zhejiang Inst Geol & Mineral Resources, Hangzhou 310007, China
| | - Yan Zhu
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310027, China; Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province, Zhejiang University, Hangzhou, Zhejiang, 310028, China.
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Tian Y, Xu H, Liu S, Fang M, Wu Y, Gong Z. Study on the bioaccessibility and bioavailability of perchlorate in different food matrices in vitro. Food Chem 2020; 333:127470. [PMID: 32653684 DOI: 10.1016/j.foodchem.2020.127470] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 06/18/2020] [Accepted: 06/29/2020] [Indexed: 10/23/2022]
Abstract
Perchlorate, a persistent pollutant, interferes with iodine uptake by the thyroid. Perchlorate exposure mainly occurs through ingested food; understanding the bioaccessibility and bioavailability of perchlorate in foods facilitate more accurate human health risk assessments. An in vitro digestion/Caco-2 cell model was used for this research. The bioaccessibility of perchlorate in the control group, lettuce, rice and formula was 93.45%, 70.14%, 70.25%, and 63.68%, respectively. The bioavailability of perchlorate was as follows: control group, 43.45%; rice, 37.17%; lettuce, 35.13%; and formula, 30.72%. The absorptive apparent permeability coefficient (Papp) of the control, lettuce, rice, and formula was 30-101 nm/s, 32-65 nm/s, 54-161 nm/s, and 41-88 nm/s, respectively. The results suggested that the risk from perchlorate was overestimated only when considering the content of perchlorate in foods and that the presence of food matrices reduced perchlorate bioavailability by differing degrees.
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Affiliation(s)
- Yimei Tian
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Hao Xu
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Shiqiao Liu
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Min Fang
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China
| | - Yongning Wu
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, China National Center for Food Safety Risk Assessment, Beijing 100021, People's Republic of China
| | - Zhiyong Gong
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, Hubei, People's Republic of China.
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Chang WH, Chen HL, Lee CC. Dietary exposure assessment to perchlorate in the Taiwanese population: A risk assessment based on the probabilistic approach. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115486. [PMID: 32911335 DOI: 10.1016/j.envpol.2020.115486] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 08/07/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
Perchlorate is an endocrine-disrupting chemical (EDC) that contaminate various foodstuffs. Exposure to perchlorate may cause severe health problems, mainly thyroid dysfunction. However, information on perchlorate contamination of consumer foods in Taiwan is limited. This study investigated perchlorate levels in 310 food samples belonging to 12 food groups collected from Taiwanese markets. A probabilistic risk assessment was conducted to assess the related exposure to Taiwanese people. Perchlorate was detected in 65% of the samples and high levels were identified in certain plant-origin, fruit, and processed food samples. A probabilistic approach was used to estimate daily dietary dose (Monte Carlo-estimated 95th percentile dietary exposure [MCS 95]) by using the Taiwan National Food Consumption database for 14 sex/age groups. The highest and lowest average daily doses (ADDs) were in the age groups of >65 years (MCS 95 = 3.60/3.90 [male/female] μg/kg bw/day) and 16-18 years (MCS 95 = 1.70/1.47 [M/F] μg/kg bw/day), respectively. The 95th percentile of the hazard index of exposure to perchlorate of all sex/age groups far exceeded the tolerable daily intake (0.3 μg/kg bw/day) and reference dose (0.7 μg/kg bw/day) set by the European Food Safety Authority and US EPA, respectively, but it was lower than the provisional maximum tolerable daily intake (10 μg/kg bw/day) suggested by the Joint FAO/WHO Expert Committee on Food Additives. The intake quantity and concentrations of perchlorate from vegetables, fruits, and whole grains are the critical contributors for the ADDs and integrated risk of dietary exposure to perchlorate. Long-term exposure through diets should be considered, instead of focusing on individual EDC during dietary risk assessment in specific populations. Furthermore, cumulative risks for exposure to multiple contaminants, particularly those causing thyroid adverse effects, may be higher than that from perchlorate exposure alone.
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Affiliation(s)
- Wei-Hsiang Chang
- Department of Food Safety/ Hygiene and Risk Management, Medical College, National Cheng Kung University, Tainan, 704, Taiwan; Research Center of Environmental Trace Toxic Substances, National Cheng Kung University, Tainan, 701, Taiwan
| | - Hsiu-Ling Chen
- Department of Food Safety/ Hygiene and Risk Management, Medical College, National Cheng Kung University, Tainan, 704, Taiwan; Research Center of Environmental Trace Toxic Substances, National Cheng Kung University, Tainan, 701, Taiwan
| | - Ching-Chang Lee
- Research Center of Environmental Trace Toxic Substances, National Cheng Kung University, Tainan, 701, Taiwan; Department of Environmental and Occupational Health, Medical College, National Cheng Kung University, Tainan, 704, Taiwan.
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25
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Uche UI, Suzuki S, Fulda KG, Zhou Z. Environment-wide association study on childhood obesity in the U.S. ENVIRONMENTAL RESEARCH 2020; 191:110109. [PMID: 32841636 DOI: 10.1016/j.envres.2020.110109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/23/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Childhood obesity is a national public health issue with increasing prevalence. It has been linked to diet, lack of physical activity, and genetic susceptibility, with more recent evidence that it could also result from environmental factors. Studies linking it to environmental factors are limited, unsystematic, incomprehensive, and inconclusive. OBJECTIVE To conduct an environment-wide association study (EWAS) to comprehensively investigate all the environmental factors available in a nationally representative sample of children to determine factors associated with childhood obesity. METHODS We utilized the 1999-2016 National Health and Nutrition Examination Survey (NHANES) datasets and included all children/adolescents (6-17 years). Obesity was measured using body mass index and waist to height ratio. A multinomial and binary logistic regression were used adjusting for age, sex, race/ethnicity, creatinine, calorie intake, physical activity, screen time, limitation to physical activities, and socioeconomic status. We then controlled for multiple hypothesis testing and validated our findings on a different cohort of children. RESULTS We found that metals such as beryllium (OR: 3.305 CI: 1.460-7.479) and platinum (OR: 1.346 CI: 1.107-1.636); vitamins such as gamma-tocopherol (OR: 8.297 CI: 5.683-12.114) and delta-tocopherol (OR: 1.841 CI:1.476-2.297); heterocyclic aromatic amines such as 2-Amino-9H-pyrido (2,3-b) indole (OR: 1.323 CI: 1.083-1.617) and 2-Amino-3-methyl-9H-pyriodo(2,3-b)indole (OR: 2.799 CI: 1.442-5.433); polycyclic aromatic amines such as 9- fluorene (OR: 1.509 CI: 1.230-1.851) and 4-phenanthrene (OR: 2.828 CI: 1.632-4.899); and caffeine metabolites such as 1,3,7-trimethyluric acid (OR: 1.22 CI: 1.029-1.414) and 1,3,7-trimethylxanthine (OR: 1.258 CI: 1.075-1.473) were positively and significantly associated with childhood obesity. CONCLUSION Following the unique concept of EWAS, certain environmental factors were associated with childhood obesity. Further studies are required to confirm these associations while investigating their mechanisms of action.
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Affiliation(s)
- Uloma Igara Uche
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, USA.
| | - Sumihiro Suzuki
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Kimberly G Fulda
- Department of Family Medicine and Osteopathic Manipulative Medicine; North Texas Primary Care Practice-Based Research Network (NorTex) University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Zhengyang Zhou
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, USA
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Opazo MC, Coronado-Arrázola I, Vallejos OP, Moreno-Reyes R, Fardella C, Mosso L, Kalergis AM, Bueno SM, Riedel CA. The impact of the micronutrient iodine in health and diseases. Crit Rev Food Sci Nutr 2020; 62:1466-1479. [DOI: 10.1080/10408398.2020.1843398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ma. Cecilia Opazo
- Laboratorio de Endocrino-Inmunología, Facultad de Ciencias de la Vida, Departamento de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Endocrine-Immunology Laboratory, Facultad de Ciencias de la Vida, Departamento de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
| | - Irenice Coronado-Arrázola
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Omar P. Vallejos
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo Moreno-Reyes
- Erasme Hospital, Department of Nuclear Medicine, Université Libre de Bruxelles, Bruxelles, Belgium
| | - Carlos Fardella
- Millennium Institute on Immunology and Immunotherapy (IMII). Departmento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departmento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Translational Research in Endocrinology (CETREN-UC), School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Lorena Mosso
- Millennium Institute on Immunology and Immunotherapy (IMII). Departmento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departmento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alexis M. Kalergis
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- Departmento de Endocrinología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Susan M. Bueno
- Millennium Institute on Immunology and Immunotherapy, Departamento de Genética Molecular y Microbiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Claudia A. Riedel
- Laboratorio de Endocrino-Inmunología, Facultad de Ciencias de la Vida, Departamento de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
- Millennium Institute on Immunology and Immunotherapy, Endocrine-Immunology Laboratory, Facultad de Ciencias de la Vida, Departamento de Ciencias Biológicas, Universidad Andres Bello, Santiago, Chile
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A highly-efficient and cost-effective pretreatment method for selective extraction and detection of perchlorate in tea and dairy products. Food Chem 2020; 328:127113. [DOI: 10.1016/j.foodchem.2020.127113] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 12/15/2022]
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Bantol KEA, Brumberg HL, Shah SI, Javier JR. Perspectives from the Society for Pediatric Research: contaminants of water and children's health: Can we do better? Pediatr Res 2020; 88:535-543. [PMID: 32470969 DOI: 10.1038/s41390-020-0985-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 02/18/2020] [Accepted: 04/29/2020] [Indexed: 01/09/2023]
Abstract
Children are uniquely susceptible to the health consequences of water contamination. In this review, we summarize the existing, robust literature supporting the importance of examining specific water contaminants (i.e., lead, pesticides, nitrates, arsenic, perchlorate) and the routes of contamination in the United States and globally. We also discuss the health effects of exposure to contaminated water and significant disparities related to access to clean water. Lastly, we offer strategies for prevention and intervention-including those focused on the individual patient level-and review the current US policy framework pertaining to regulation of these toxicants. IMPACT: A key message in this article is that exposure to water contaminants have serious and long-lasting consequences on children's health. This review summarizes current existing literature and adds policy recommendations supporting clean water for children. Information from this review has two potential impacts: Guide health professionals in screening and/or treating children's health problems resulting from water contaminant exposure. Guide policy makers in using evidence-based approaches to improve water quality and clean water access.
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Affiliation(s)
- Kamil Evy A Bantol
- Division of General Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA, USA
| | - Heather L Brumberg
- New York Medical College, Maria Fareri Children's Hospital at Westchester Medical Center, New York, NY, USA
| | - Shetal I Shah
- New York Medical College, Maria Fareri Children's Hospital at Westchester Medical Center, New York, NY, USA
| | - Joyce R Javier
- Division of General Pediatrics, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
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Lisco G, De Tullio A, Giagulli VA, De Pergola G, Triggiani V. Interference on Iodine Uptake and Human Thyroid Function by Perchlorate-Contaminated Water and Food. Nutrients 2020; 12:E1669. [PMID: 32512711 PMCID: PMC7352877 DOI: 10.3390/nu12061669] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Perchlorate-induced natrium-iodide symporter (NIS) interference is a well-recognized thyroid disrupting mechanism. It is unclear, however, whether a chronic low-dose exposure to perchlorate delivered by food and drinks may cause thyroid dysfunction in the long term. Thus, the aim of this review was to overview and summarize literature results in order to clarify this issue. METHODS Authors searched PubMed/MEDLINE, Scopus, Web of Science, institutional websites and Google until April 2020 for relevant information about the fundamental mechanism of the thyroid NIS interference induced by orally consumed perchlorate compounds and its clinical consequences. RESULTS Food and drinking water should be considered relevant sources of perchlorate. Despite some controversies, cross-sectional studies demonstrated that perchlorate exposure affects thyroid hormone synthesis in infants, adolescents and adults, particularly in the case of underlying thyroid diseases and iodine insufficiency. An exaggerated exposure to perchlorate during pregnancy leads to a worse neurocognitive and behavioral development outcome in infants, regardless of maternal thyroid hormone levels. DISCUSSION AND CONCLUSION The effects of a chronic low-dose perchlorate exposure on thyroid homeostasis remain still unclear, leading to concerns especially for highly sensitive patients. Specific studies are needed to clarify this issue, aiming to better define strategies of detection and prevention.
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Affiliation(s)
- Giuseppe Lisco
- ASL Brindisi, Unit of Endocrinology, Metabolism & Clinical Nutrition, Hospital “A. Perrino”, Strada per Mesagne 7, 72100 Brindisi, Puglia, Italy;
| | - Anna De Tullio
- Interdisciplinary Department of Medicine—Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases, University of Bari “Aldo Moro”, School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Puglia, Italy; (A.D.T.); (V.A.G.)
| | - Vito Angelo Giagulli
- Interdisciplinary Department of Medicine—Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases, University of Bari “Aldo Moro”, School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Puglia, Italy; (A.D.T.); (V.A.G.)
- Clinic of Endocrinology and Metabolic Disease, Conversano Hospital, Via Edmondo de Amicis 36, 70014 Conversano, Bari, Puglia, Italy
| | - Giovanni De Pergola
- Department of Biomedical Sciences and Human Oncology, Section of Internal Medicine and Clinical Oncology, University of Bari Aldo Moro, Piazza Giulio Cesare 11, 70124 Bari, Puglia, Italy;
| | - Vincenzo Triggiani
- Interdisciplinary Department of Medicine—Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases, University of Bari “Aldo Moro”, School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Puglia, Italy; (A.D.T.); (V.A.G.)
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30
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Gump BB, Hruska B, Parsons PJ, Palmer CD, MacKenzie JA, Bendinskas K, Brann L. Dietary contributions to increased background lead, mercury, and cadmium in 9-11 Year old children: Accounting for racial differences. ENVIRONMENTAL RESEARCH 2020; 185:109308. [PMID: 32222635 PMCID: PMC7898456 DOI: 10.1016/j.envres.2020.109308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/24/2020] [Accepted: 02/24/2020] [Indexed: 05/22/2023]
Abstract
BACKGROUND Initial interest in the adverse consequences of exposure to lead (Pb), mercury (Hg), and cadmium (Cd) focused on relatively high exposures through environmental or occupational sources; however, recent evidence suggests even low-level background exposure to non-essential metals might be detrimental, particularly for children's health and development. One potentially important source of increased background levels of non-essential toxic metals is diet. OBJECTIVES We considered whether differences in diet are associated with levels of non-essential metals in blood and whether racial differences in metals are mediated by dietary differences. METHODS We assessed blood levels of Pb, Hg, and Cd in a sample of 9-11 year-old children (N = 295) comprised of 42% European Americans (EAs), 58% African American (AAs), and 47% female. Diet was assessed using 24-h dietary recalls during phone interviews administered to parents on two consecutive days (Friday and Saturday). The Healthy Eating Index-2105 (HEI-2015) was calculated to assess diet quality. RESULTS The current study identified significant dietary sources of non-essential metal exposure - namely total fruit for Pb, total protein for Hg, and greens and beans for Cd. Moreover, AAs were found to have significantly higher blood levels of Pb and Hg than EAs and these racial differences were significantly mediated by these dietary differences. DISCUSSION This study is one of very few to consider total diet in children and exposure to the non-essential metals Pb, Hg, and Cd, and the first to demonstrate that racial differences in increased background blood levels of non-essential toxic metals can be accounted for by racial differences in diet. Given regional differences in food consumption patterns and specific farm and store sources for the foods, the generalizability of the current findings has yet to be determined; however, commonly consumed foods appear to be a significant source of low-level non-essential metals.
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Affiliation(s)
- Brooks B Gump
- Department of Public Health, Food Studies, and Nutrition, Syracuse University, United States.
| | - Bryce Hruska
- Department of Public Health, Food Studies, and Nutrition, Syracuse University, United States
| | - Patrick J Parsons
- Laboratory of Inorganic and Nuclear Chemistry, Wadsworth Center, New York State Department of Health, United States; Department of Environmental Health Sciences, School of Public Health, The University at Albany, United States
| | - Christopher D Palmer
- Laboratory of Inorganic and Nuclear Chemistry, Wadsworth Center, New York State Department of Health, United States; Department of Environmental Health Sciences, School of Public Health, The University at Albany, United States
| | - James A MacKenzie
- Department of Biological Sciences, State University of New York College at Oswego, United States
| | - Kestutis Bendinskas
- Department of Chemistry, State University of New York College at Oswego, United States
| | - Lynn Brann
- Department of Public Health, Food Studies, and Nutrition, Syracuse University, United States
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31
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Risk of Iodine Deficiency in Extremely Low Gestational Age Newborns on Parenteral Nutrition. Nutrients 2020; 12:nu12061636. [PMID: 32492945 PMCID: PMC7352251 DOI: 10.3390/nu12061636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/21/2020] [Accepted: 05/26/2020] [Indexed: 12/03/2022] Open
Abstract
Iodine is an essential component of thyroid hormones, which play a critical role in neurodevelopment. The iodine status of pregnant women and their newborns is not checked routinely. Extremely Low Gestational Age Newborns do not receive Iodine supplementation while on parenteral nutrition (PN). We measured urine iodine levels and thyroid function tests in 50 mother–infant dyads at birth, at 1 week, 1, 2, 3 months and near discharge. We correlated maternal and neonatal urine iodine levels with thyroid functions and measured iodine levels in milk and PN. In our study, 64% of mothers were iodine deficient at the time of delivery, their free T4 levels were 0.48 (0.41–0.54) ng/dL with normal thyroid-stimulating hormone (TSH). Iodine levels were thirty-fold higher in extremely low gestational age newborns (ELGAN) exposed to iodine comparing to full terms (p < 0.001), but this effect lasted <1 week. At 1 month of age, ELGAN on PN developed iodine deficiency (p = 0.017) and had high thyroglobulin levels of 187 (156–271) ng/mL. Iodine levels improved with enteral feeds by 2 months of age (p = 0.01). Iodine deficiency is prevalent among pregnant women and ELGAN; in particular, those on PN are at risk of hypothyroidism. Iodine supplementation during pregnancy and postnatally should be considered to avoid iodine deficiency.
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Roseland JM, Phillips KM, Patterson KY, Pehrsson PR, Bahadur R, Ershow AG, Somanchi M. Large Variability of Iodine Content in Retail Cow's Milk in the U.S. Nutrients 2020; 12:E1246. [PMID: 32353959 PMCID: PMC7281966 DOI: 10.3390/nu12051246] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/16/2020] [Accepted: 04/22/2020] [Indexed: 12/18/2022] Open
Abstract
Iodine intake is of contemporary public health interest. The recommended daily iodine intake is 150 µg for most adults, and milk is an important source of iodine in the U.S. diet. Iodine concentration in cow's milk is affected by diet and iodine supplementation levels, milking sanitation practices, and other factors. Current analytical iodine data in U.S. retail milk are crucial for evaluating population-wide health outcomes related to diet. Samples of whole (3.25% fat), 2%, 1%, and skim (0-0.5% fat) milk were procured from 24 supermarkets across the U.S. using a census-based statistical plan. Iodine was analyzed by inductively coupled plasma mass spectrometry, including certified reference materials and control samples to validate results. No difference in iodine content was found between milkfat levels (F3,69 1.033, p = 0.4). Overall mean (SEM) was 85(5.5) µg/serving (240 mL). However, the 95% prediction interval of 39-185 µg/serving for individual samples indicated high variability among individual samples. Given the recommended 150 µg iodine per day for most adults along with the study mean, one milk serving can provide approximately 57% of daily intake. Researchers, health care professionals, and consumers should be aware of iodine variability in milk, while additional research is needed to investigate the impact of iodine variability factors.
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Affiliation(s)
- Janet M. Roseland
- U.S. Department of Agriculture, Agricultural Research Service, Methods and Application of Food Composition Laboratory, Beltsville, MD 20705, USA; (K.Y.P.); (P.R.P.)
| | | | - Kristine Y. Patterson
- U.S. Department of Agriculture, Agricultural Research Service, Methods and Application of Food Composition Laboratory, Beltsville, MD 20705, USA; (K.Y.P.); (P.R.P.)
| | - Pamela R. Pehrsson
- U.S. Department of Agriculture, Agricultural Research Service, Methods and Application of Food Composition Laboratory, Beltsville, MD 20705, USA; (K.Y.P.); (P.R.P.)
| | - Rahul Bahadur
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA; (R.B.); (M.S.)
| | - Abby G. Ershow
- National Institutes of Health, Office of Dietary Supplements, Bethesda, MD 20892, USA;
| | - Meena Somanchi
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA; (R.B.); (M.S.)
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Abstract
Thyroid disease is common in the general population, especially in women, and also may be prevalent among athletes. Autoimmune disorders are the most common cause of thyroid disorders in countries with iodine-fortification programs; however, thyroid dysfunction can be brought on by nutritional factors, including insufficient energy intake and iodine, selenium, iron, and vitamin D deficiency. Additionally, strenuous exercise may be associated with transient alterations in thyroid hormones. While the development of thyroid related disorders has the potential to impact health and peak performance, typical clinical manifestations are highly variable, lack specificity, and are frequently confused with other health problems. The assessment process should focus on anthropometric changes, biochemical tests (thyroid panel), personal and family history, examination for appropriate signs and symptoms, and diet and environmental assessment that includes adequacy of energy, iodine, iron, selenium, and vitamin D intake/status along with excess stress and exposure to environmental contaminants and dietary goitrogens.
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34
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Liao Z, Cao D, Gao Z, Zhang S. Occurrence of perchlorate in processed foods manufactured in China. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106813] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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35
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Panth P, Guerin G, DiMarco NM. A Review of Iodine Status of Women of Reproductive Age in the USA. Biol Trace Elem Res 2019; 188:208-220. [PMID: 30617900 PMCID: PMC6373336 DOI: 10.1007/s12011-018-1606-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 12/05/2018] [Indexed: 01/20/2023]
Abstract
Iodine, an essential micronutrient, is required to produce thyroid hormones. Iodine deficiency disorders (IDD) comprise a range of adverse maternal and fetal outcomes, with the most significant irreversible effect resulting from neurodevelopmental deficits in fetal brain caused by deficient iodine status during early pregnancy. The objective of this scoping review was to summarize the studies that assessed iodine status of women of reproductive age in the USA. A systematic review of literature using the PRISMA Extension for Scoping Reviews (PRISMA-ScR) statement was conducted. PubMed, Medline, CINAHL, EMBASE, EBSCOHost, Cochrane, ERIC, Google Scholar, and Web of Science databases were searched, 1652 records were identified. One thousand six hundred forty-one records that did not satisfy the inclusion/exclusion criteria and quality review were excluded, and 11 peer-reviewed articles were determined to be eligible for this scoping review. Despite the USA being considered iodine sufficient for the general population, the US dietary iodine intakes have decreased drastically since the 1970s, with iodine deficiency reemerging in vulnerable groups such as women of reproductive age. Although data to conduct a scoping review of iodine status among women of reproductive age in the USA was scarce, majority of the articles reviewed demonstrate emergent iodine deficiency in this population of women of reproductive age, indicating alarm for a public health concern needing immediate attention.
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Affiliation(s)
- Pallavi Panth
- Department of Nutrition and Food Sciences, College of Health Sciences, Texas Woman's University, P.O. Box 425888, Denton, TX, 76204-5876, USA.
- Institute for Women's Health, College of Health Sciences, Texas Woman's University, Denton, TX, 76204-5876, USA.
| | - Gena Guerin
- Department of Kinesiology, College of Health Sciences, Texas Woman's University, Denton, TX, 76204-5876, USA
| | - Nancy M DiMarco
- Department of Nutrition and Food Sciences, College of Health Sciences, Texas Woman's University, P.O. Box 425888, Denton, TX, 76204-5876, USA.
- Institute for Women's Health, College of Health Sciences, Texas Woman's University, Denton, TX, 76204-5876, USA.
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36
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Pike V, Zlotkin S. Excess micronutrient intake: defining toxic effects and upper limits in vulnerable populations. Ann N Y Acad Sci 2018; 1446:21-43. [PMID: 30569544 DOI: 10.1111/nyas.13993] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/21/2018] [Accepted: 11/06/2018] [Indexed: 12/17/2022]
Abstract
Excessive micronutrient intake causes a variety of adverse health effects, depending on dose and duration. The risk of excess intake carries significant implications for micronutrient delivery interventions, particularly when such programs are overlapping. To minimize risk and provide public health guidance, several countries and the Food and Agriculture Organization of the United Nations/World Health Organization have set upper intake levels (ULs) for various life-stage populations using the risk assessment framework. However, there is a lack of international consensus on the actual ULs due to variability in application of this framework and a scarcity of evidence from which to draw upon, especially for children. Often ULs for children are established through a downward weight-based extrapolation from adult ULs, which is not always appropriate. The published ULs of nine organizations are compared, recent population nutrient intake evidence is presented, and the toxic effects of key minerals and vitamins are reviewed. Finally, the evidence for toxicity and setting of ULs for each nutrient is discussed including a comment on our degree of confidence in the strength of existing individual ULs. Challenges with risk assessment and opportunities for strengthening the definition of ULs are discussed.
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Affiliation(s)
- Vanessa Pike
- The Centre for Global Child Health, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Stanley Zlotkin
- The Centre for Global Child Health, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada.,Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada.,The Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada.,The Munk School of Global Affairs and Public Policy, University of Toronto, Toronto, Ontario, Canada
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37
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McCarthy WP, O'Callaghan TF, Danahar M, Gleeson D, O'Connor C, Fenelon MA, Tobin JT. Chlorate and Other Oxychlorine Contaminants Within the Dairy Supply Chain. Compr Rev Food Sci Food Saf 2018; 17:1561-1575. [DOI: 10.1111/1541-4337.12393] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/24/2018] [Accepted: 08/27/2018] [Indexed: 11/27/2022]
Affiliation(s)
- William P. McCarthy
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
- Dublin Inst. of Technology; Cathal Brugha Street, Dublin 1 Dublin Ireland
| | - Tom F. O'Callaghan
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
| | - Martin Danahar
- Food Safety Dept.; Ashtown Food Research Centre; Teagasc, Ashtown, Dublin 15 Dublin Ireland
| | - David Gleeson
- Teagasc; Animal & Grassland Research and Innovation Centre, Moorepark; Fermoy Co. Cork, Cork Ireland
| | - Christine O'Connor
- Dublin Inst. of Technology; Cathal Brugha Street, Dublin 1 Dublin Ireland
| | - Mark A. Fenelon
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
| | - John T. Tobin
- Food Chemistry & Technology Dept.; Teagasc Food Research Centre, Moorepark; Fermoy, Co. Cork Cork Ireland
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38
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Li Y, Liao R, Gan Z, Qu B, Wang R, Chen M, Ding S, Su S. Seasonal Variation and Exposure Risks of Perchlorate in Soil, Indoor Dust, and Outdoor Dust in China. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 75:367-376. [PMID: 29691615 DOI: 10.1007/s00244-018-0526-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 04/12/2018] [Indexed: 06/08/2023]
Abstract
A total of 97 paired soil, outdoor dust, and indoor dust samples were collected in the national scale of China in summer, and the perchlorate levels were compared with those in soil and outdoor dust samples collected in winter in our previous study. The median perchlorate concentrations in the outdoor dust, indoor dust, and soil samples were 8.10, 11.4, and 0.05 mg/kg, respectively, which were significantly lower than those in the winter samples due to the natural factors and human activities. No significant differences in perchlorate concentrations were found between Northern and Southern China in the dust samples, whereas the difference was obtained in the soil samples. In the terms of possible source, the perchlorate levels in the outdoor dust exhibited strong correlation with SO42- (r2 = 0.458**) and NO3- (r2 = 0.389**), indicating part of perchlorate in outdoor environment was likely from atmospheric oxidative process in summer. The perchlorate, SO42-, and Cl- levels in the indoor dust were significantly related to those in the outdoor dust, suggesting that outdoor contaminants might be an important source for indoor environment. Furthermore, the human exposure to perchlorate was under relatively safe state in China except for special sites or periods with high perchlorate levels. Dust made an unexpected contribution of 41.3% to the total daily perchlorate intake for children, whereas 2.46% for adults in China based on biomonitoring, which deserves more attention.
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Affiliation(s)
- Yiwen Li
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Ruoying Liao
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Zhiwei Gan
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China.
| | - Bing Qu
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Rong Wang
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Mengqin Chen
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Sanglan Ding
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
| | - Shijun Su
- College of Architecture and Environment, Sichuan University, Chengdu, 610065, China
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39
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Wang Z, Sparling M, Tague B. Analysis of perchlorate in baby food on Canadian (Ottawa) markets in 2009 and estimated dietary exposure. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2018; 35:2022-2031. [PMID: 30188260 DOI: 10.1080/19440049.2018.1508891] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In order to determine the baseline levels of perchlorate in major brands of baby food, 200 baby food products were collected from retail stores in Ottawa, Canada and analysed for perchlorate in 2010. The seven food groups tested were fruit, juices, vegetables, meat, yogurt, mixed (vegetable mixed with meat) and other (e.g. vegetable mixed with meat and cereal, cheese, egg,). Samples were extracted with a mixture of methanol and 1% acetic acid (4:1, v/v). Determination was conducted by stable isotope dilution ion chromatography tandem mass spectrometry (ID-IC-MS/MS). The complexity of different food matrices required additional method validation. The perchlorate levels in 46 samples were found to be lower than the quantification limit (0.2 ng g-1). The perchlorate levels in the other 154 baby food samples were also low; about 96.7% of the baby foods had perchlorate levels less than 10 ng g-1 (ranged from 0.2 to 22.4 ng g-1, median1.35 ng g-1); only 5 samples had perchlorate levels higher than 10 ng g-1. Dietary exposure to perchlorate from analysed baby food was conservatively estimated to range from 0.007 to 0.121 µg/kg bw/d based on the mean intake for children (1-5 years old).
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Affiliation(s)
- Zhongwen Wang
- a Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Product and Food Branch , Health Canada , Ottawa , Canada
| | - Melissa Sparling
- a Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Product and Food Branch , Health Canada , Ottawa , Canada
| | - Brett Tague
- a Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Product and Food Branch , Health Canada , Ottawa , Canada
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40
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Lee JH, Song RY, Yi JW, Yu HW, Kwon H, Kim SJ, Chai YJ, Choi JY, Moon JH, Lee KE, Park YJ, Park SK. Case-Control Study of Papillary Thyroid Carcinoma on Urinary and Dietary Iodine Status in South Korea. World J Surg 2018; 42:1424-1431. [PMID: 29067516 DOI: 10.1007/s00268-017-4287-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND The association between iodine levels and the risk of papillary thyroid cancer (PTC) has been suggested, but not definitively established. This study is to compare the iodine status of a group of patients with PTC (with and without BRAF V600E) with that of a healthy population cohort. METHODS A cohort of patients scheduled for thyroidectomy was enrolled, along with a community-based health-screening cohort with no known history of thyroid disease. Median urinary iodine (UI) levels, creatinine-adjusted median UI levels, and food frequency questionnaire (FFQ) scores (mean ± SD) were compared. In a subgroup analysis, these values were compared between BRAF V600E-positive and BRAF V600E-negative patients in the PTC group. RESULTS The PTC group consisted of 210 patients, and the control group consisted of 90 healthy individuals. Among the 191 PTC patients whose BRAF V600E mutational status was reported, 169 (88.5%) were revealed positive for the mutation. The median UI levels were significantly higher in the PTC group (786.0 μg/l) than the control group (112.0 μg/l; p < 0.001), as was the case with creatinine-adjusted median UI levels (884.6 μg/g creatinine versus 182.0 μg/g creatinine; p < 0.001) and FFQ scores (66.2 ± 17.5, range 13-114 versus 54.6 ± 21.5, range 16-134; p < 0.001). No significant differences were seen in the subgroup analysis between BRAF V600E-positive and BRAF V600E-negative patients. CONCLUSIONS Our results indicate that iodine status differs significantly between patients with PTC and healthy controls, suggesting that iodine may be involved in the occurrence of PTC, although the association between iodine levels and BRAF mutational status did not reach statistical significance.
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Affiliation(s)
- Joon-Hyop Lee
- Department of Surgery, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea.,Thyroid and Endocrine Surgery Section, Department of Surgery, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - Ra-Yeong Song
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Jin Wook Yi
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Hyeong Won Yu
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Hyungju Kwon
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Su-Jin Kim
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea.,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Young Jun Chai
- Department of Surgery, Seoul National University Hospital Boramae Medical Center, Seoul, Republic of Korea
| | - June Young Choi
- Department of Surgery, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Jae Hoon Moon
- Department of Internal Medicine, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Kyu Eun Lee
- Department of Surgery, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea. .,Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Young Joo Park
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Internal Medicine, Seoul National University Hospital and College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Sue K Park
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Preventive Medicine, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
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41
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Herrick KA, Perrine CG, Aoki Y, Caldwell KL. Iodine Status and Consumption of Key Iodine Sources in the U.S. Population with Special Attention to Reproductive Age Women. Nutrients 2018; 10:E874. [PMID: 29986412 PMCID: PMC6073695 DOI: 10.3390/nu10070874] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 06/28/2018] [Accepted: 07/02/2018] [Indexed: 11/19/2022] Open
Abstract
We estimated iodine status (median urinary iodine concentration (mUIC (µg/L))) for the US population (6 years and over; n = 4613) and women of reproductive age (WRA) (15⁻44 years; n = 901). We estimated mean intake of key iodine sources by race and Hispanic origin. We present the first national estimates of mUIC for non-Hispanic Asian persons and examine the intake of soy products, a potential source of goitrogens. One-third of National Health and Nutrition Examination Survey (NHANES) participants in 2011⁻2014 provided casual urine samples; UIC was measured in these samples. We assessed dietary intake with one 24-h recall and created food groups using the USDA’s food/beverage coding scheme. For WRA, mUIC was 110 µg/L. For both non-Hispanic white (106 µg/L) and non-Hispanic Asian (81 µg/L) WRA mUIC was significantly lower than mUIC among Hispanic WRA (133 µg/L). Non-Hispanic black WRA had a mUIC of 124 µg/L. Dairy consumption was significantly higher among non-Hispanic white (162 g) compared to non-Hispanic black WRA (113 g). Soy consumption was also higher among non-Hispanic Asian WRA (18 g compared to non-Hispanic black WRA (1 g). Differences in the consumption pattern of key sources of iodine and goitrogens may put subgroups of individuals at risk of mild iodine deficiency. Continued monitoring of iodine status and variations in consumption patterns is needed.
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Affiliation(s)
- Kirsten A Herrick
- Division of Health and Nutrition Examination Surveys, National Center for Health Statistics, Centers for Disease Control and Prevention (CDC), Hyattsville, MD 20782, USA.
| | - Cria G Perrine
- Division of Nutrition, Physical Activity, and Obesity, CDC, Atlanta, GA 30341, USA.
| | - Yutaka Aoki
- Division of Health and Nutrition Examination Surveys, National Center for Health Statistics, Centers for Disease Control and Prevention (CDC), Hyattsville, MD 20782, USA.
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42
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Comparison of ICP-MS and Spectrophotometry Methods for the Analysis of Iodine in 2013 US FDA Total Diet Study Samples. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1301-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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43
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Biomonitoring Equivalents for interpretation of urinary iodine. Regul Toxicol Pharmacol 2018; 94:40-46. [DOI: 10.1016/j.yrtph.2018.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 01/04/2018] [Accepted: 01/18/2018] [Indexed: 11/21/2022]
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44
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O'Kane SM, Pourshahidi LK, Mulhern MS, Strain JJ, Mackle EM, Koca D, Schomburg L, Hill S, O'Reilly J, Kmiotek D, Deitrich C, Bath SC, Yeates AJ. Cow Milk Consumption Increases Iodine Status in Women of Childbearing Age in a Randomized Controlled Trial. J Nutr 2018; 148:401-408. [PMID: 29546298 DOI: 10.1093/jn/nxx043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 11/13/2017] [Indexed: 01/30/2023] Open
Abstract
Background Recent evidence has highlighted the prevalence of mild-to-moderate iodine deficiency in women of childbearing age and pregnant women, with important public health ramifications due to the role of iodine, which is required for thyroid hormone production, in neurodevelopment. Cow milk contributes the greatest amount to iodine intakes in several countries. Objective The objective of this study was to investigate the effect of increased cow milk consumption on iodine status, thyroid hormone concentrations, and selenium status. Methods A 12-wk randomized controlled trial was conducted in 78 low-moderate milk-consuming (<250 mL/d) healthy women (aged 18-45 y). The intervention group was asked to consume 3 L semiskimmed milk/wk, whereas the control group continued their usual milk consumption (baseline median: 140 mL/d; IQR: 40-240 mL/d). At baseline and weeks 6 and 12, participants provided a spot urine sample [urinary iodine concentration (UIC), creatinine] and a fasting blood sample (thyroid hormone concentrations, serum total selenium, selenoprotein P). Results At baseline, the median (IQR) UIC of all participants was 78.5 µg/L (39.1-126.1 µg/L). Changes in the median UIC from baseline to week 6 (35.4 compared with 0.6 µg/L; P = 0.014) and week 12 (51.6 compared with -3.8 µg/L; P = 0.045) were significantly greater in the intervention group compared with the control group. However, despite being higher within the intervention group at weeks 6 and 12, the change in the iodine:creatinine ratio from baseline was not significantly different between groups at either week 6 (P = 0.637) or week 12 (P = 0.178). There were no significant differences in thyroid hormone concentrations or selenium status between groups at any time point. Conclusions The present study shows that the consumption of additional cow milk can significantly increase UIC in women of childbearing age. These results suggest that cow milk is a potentially important dietary source of iodine in this population group. This trial was registered at www.clinicaltrials.gov as NCT02767167.
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Affiliation(s)
- S Maria O'Kane
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
| | - L Kirsty Pourshahidi
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
| | - Maria S Mulhern
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
| | - J J Strain
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
| | - Emer M Mackle
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
| | - Duygu Koca
- Charité-Universitätsmedizin Berlin, Institute for Experimental Endocrinology, Berlin, Germany
| | - Lutz Schomburg
- Charité-Universitätsmedizin Berlin, Institute for Experimental Endocrinology, Berlin, Germany
| | - Sarah Hill
- LGC, Teddington, Middlesex, United Kingdom
| | | | | | | | - Sarah C Bath
- Department of Nutritional Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, United Kingdom
| | - Alison J Yeates
- Nutrition Innovation Centre for Food and Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraine, County Londonderry, United Kingdom
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45
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Serrano-Nascimento C, Calil-Silveira J, Dalbosco R, Zorn TT, Nunes MT. Evaluation of hypothalamus-pituitary-thyroid axis function by chronic perchlorate exposure in male rats. ENVIRONMENTAL TOXICOLOGY 2018; 33:209-219. [PMID: 29139221 DOI: 10.1002/tox.22509] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 10/24/2017] [Accepted: 10/25/2017] [Indexed: 06/07/2023]
Abstract
Perchlorate is a widespread endocrine disruptor that was previously correlated with increased serum TSH levels and decreased thyroid hormones production both in animals and humans. Even so, the regulation of gene/protein expression in the hypothalamus, pituitary and thyroid by chronic perchlorate exposure was not completely elucidated. Therefore, this study aimed to investigate the underlying mechanisms involved in the disruption of hypothalamus-pituitary-thyroid axis by chronic perchlorate exposure. Male Wistar rats were treated or not with NaClO4 in the drinking water (35 mg/Kg/day) for 60 days. Thereafter, hormone/cytokines serum levels were measured through multiplex assays; genes/proteins expression were investigated by qPCR/Western Blotting and thyroid morphology was evaluated through histological analysis. Serum TSH levels were increased and serum T4 /T3 levels were decreased in perchlorate-treated animals. This treatment also altered the thyrotropin-releasing hormone mRNA/protein content in the hypothalamus. Additionally, the expression of both subunits of TSH were increased in the pituitary of perchlorate-treated rats, which also presented significant alterations in the thyroid morphology/gene expression. Furthermore, perchlorate exposure reduced liver Dio1 mRNA expression and increased the content of pro-inflammatory cytokines in the thyroid and the serum. In conclusion, our study adds novel findings about the perchlorate-induced disruption of the hypothalamus-pituitary-thyroid axis gene/protein expression in male rats. The data presented herein also suggest that perchlorate induces thyroid and systemic inflammation through the increased production of cytokines. Taken together, our results suggest that perchlorate contamination should be monitored, especially in the individuals most susceptible to the deleterious effects of reduced levels of thyroid hormones.
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Affiliation(s)
| | - Jamile Calil-Silveira
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | - Rafael Dalbosco
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | - Telma Tenorio Zorn
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, Brazil
| | - Maria Tereza Nunes
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Brazil
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46
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Abt E, Spungen J, Pouillot R, Gamalo-Siebers M, Wirtz M. Update on dietary intake of perchlorate and iodine from U.S. food and drug administration's total diet study: 2008-2012. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2018; 28:21-30. [PMID: 28000685 DOI: 10.1038/jes.2016.78] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/09/2016] [Indexed: 06/06/2023]
Abstract
The U.S. Food and Drug Administration's (FDA) Total Diet Study (TDS) monitors the US food supply for pesticide residues, industrial chemicals, radionuclides, nutrients, and toxic elements. Perchlorate and iodine intakes based on concentrations in TDS samples collected between 2008 and 2012 were estimated in order to update an earlier TDS dietary assessment. Perchlorate is used as an oxidizing agent in rocket and missile fuel, is formed naturally in the atmosphere, and occurs naturally in some soils. Because of perchlorate's presence in soil, and in irrigation, processing, and source water, it is widely found in food. Iodine was included in the study because perchlorate at high doses interferes with iodide uptake in the thyroid. Iodine (the elemental form of iodide) is essential for growth and development, and metabolism. This study uses a novel statistical method based on a clustered zero-inflated lognormal distribution model to estimate mean and 95th percentile confidence interval concentrations for perchlorate and iodine in US foods. These estimates were used to estimate mean perchlorate and iodine exposures for the total US population and for 14 age/sex groups in the US population. Estimated mean perchlorate intake for the total US population was 0.13 μg/kg bw/day, with mean intakes for the 14 age/sex groups between 0.09 and 0.43 μg/kg bw/day. The estimated mean intakes of perchlorate for all age/sex groups were below EPA's reference dose (RfD) of 0.7 μg/kg bw/day. The estimated mean iodine intake for the total US population was 216.4 μg/person/day, with mean intakes ranging from 140.9 to 296.3 μg/person/day for the 14 age/sex groups, with all age/sex groups exceeding their respective estimated average requirements (EARs).
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Affiliation(s)
- Eileen Abt
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, MD, USA
| | - Judith Spungen
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, MD, USA
| | - Régis Pouillot
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, MD, USA
| | | | - Mark Wirtz
- US Food and Drug Administration, Center for Food Safety and Applied Nutrition, MD, USA
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47
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Maffini MV, Neltner TG, Vogel S. We are what we eat: Regulatory gaps in the United States that put our health at risk. PLoS Biol 2017; 15:e2003578. [PMID: 29261673 PMCID: PMC5737876 DOI: 10.1371/journal.pbio.2003578] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The American diet has changed dramatically since 1958, when Congress gave the United States Food and Drug Administration (FDA) the authority to ensure the safety of chemicals in food. Since then, thousands of chemicals have entered the food system. Yet their long-term, chronic effects have been woefully understudied, their health risks inadequately assessed. The FDA has been sluggish in considering scientific knowledge about the impact of exposures-particularly at low levels and during susceptible developmental stages. The agency's failure to adequately account for the risks of perchlorate-a well-characterized endocrine-disrupting chemical-to vulnerable populations is representative of systemic problems plaguing the regulation of chemicals in food. Today, we are faced with a regulatory system that, weakened by decades of limited resources, has fallen short of fully enforcing its mandates. The FDA's inability to effectively manage the safety of hundreds of chemicals is putting our children's health at risk.
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Affiliation(s)
| | | | - Sarah Vogel
- Environmental Defense Fund, Washington DC, United States of America
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48
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Lee SY, McCarthy AM, Stohl H, Ibrahim S, Jeong C, Braverman LE, Ma W, He X, Mestman JH, Schuller KE, Jahreis KA, Pearce EN, Leung AM. Urinary Iodine, Perchlorate, and Thiocyanate Concentrations in U.S. Lactating Women. Thyroid 2017; 27:1574-1581. [PMID: 29130403 PMCID: PMC5734160 DOI: 10.1089/thy.2017.0158] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Iodine is an essential micronutrient for thyroid hormone production. Adequate iodine intake and normal thyroid function are important during early development, and breastfed infants rely on maternal iodine excreted in breast milk for their iodine nutrition. The proportion of women in the United States of childbearing age with urinary iodine concentration (UIC) <50 μg/L has been increasing, and a subset of lactating women may have inadequate iodine intake. UIC may also be influenced by environmental exposure to perchlorate and thiocyanate, competitive inhibitors of iodine transport into thyroid, and lactating mammary glands. Data regarding UIC in U.S. lactating women are limited. To adequately assess the iodine sufficiency of lactating women and potential associations with environmental perchlorate and thiocyanate exposure, we conducted a multicenter, cross-sectional study of urinary iodine, perchlorate, and thiocyanate concentrations in healthy U.S. lactating women. METHODS Lactating women ≥18 years of age were recruited from three U.S. geographic regions: California, Massachusetts, and Ohio/Illinois from November 2008 to June 2016. Demographic information and multivitamin supplements use were obtained. Iodine, perchlorate, and thiocyanate levels were measured from spot urine samples. Correlations between urinary iodine, perchlorate, and thiocyanate levels were determined using Spearman's rank correlation. Multivariable regression models were used to assess predictors of urinary iodine, perchlorate, and thiocyanate levels, and UIC <100 μg/L. RESULTS A total of 376 subjects (≥125 from each geographic region) were included in the final analyses [mean (SD) age 31.1 (5.6) years, 37% white, 31% black, and 11% Hispanic]. Seventy-seven percent used multivitamin supplements, 5% reported active cigarette smoking, and 45% were exclusively breastfeeding. Median urinary iodine, perchlorate, and thiocyanate concentrations were 143 μg/L, 3.1 μg/L, and 514 μg/L, respectively. One-third of women had UIC <100 μg/L. Spot urinary iodine, perchlorate, and thiocyanate levels all significantly positively correlated to each other. No significant predictors of UIC, UIC <100 μg/L, or urinary perchlorate levels were identified. Smoking, race/ethnicity, and marital status were significant predictors of urinary thiocyanate levels. CONCLUSION Lactating women in three U.S. geographic regions are iodine sufficient with an overall median UIC of 143 μg/L. Given ubiquitous exposure to perchlorate and thiocyanate, adequate iodine nutrition should be emphasized, along with consideration to decrease these exposures in lactating women to protect developing infants.
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Affiliation(s)
- Sun Y. Lee
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Alicia M. McCarthy
- Department of Obstetrics and Gynecology, Kaiser Permanente Northern California, Walnut Creek, California
| | - Hindi Stohl
- Department of Obstetrics and Gynecology, UCLA David Geffen School of Medicine, Los Angeles, California
| | - Sherrine Ibrahim
- Department of Obstetrics and Gynecology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Christina Jeong
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Lewis E. Braverman
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Wendy Ma
- Wellesley College, Wellesley, Massachusetts
| | - Xuemei He
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Jorge H. Mestman
- Department of Medicine and Department of Obstetrics and Gynecology, Keck School of Medicine of University of Southern California, Los Angeles, California
| | - Kristin E. Schuller
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Katherine A. Jahreis
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Elizabeth N. Pearce
- Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts
| | - Angela M. Leung
- Division of Endocrinology, Diabetes, and Metabolism, UCLA David Geffen School of Medicine, Los Angeles, California
- Division of Endocrinology, Department of Medicine, VA Greater Los Angeles Healthcare System, Los Angeles, California
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Wang SL, Yi L, Ye LH, Cao J, Du LJ, Peng LQ, Xu JJ, Zhang QD. Microwave-assisted micellar extraction of organic and inorganic iodines using zwitterionic surfactants. J Chromatogr A 2017. [DOI: 10.1016/j.chroma.2017.06.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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50
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Leoterio DM, Paim APS, Belian MF, Galembeck A, Lavorante AF, Pinto E, Amorim CG, Araújo AN, Montenegro MC. Potentiometric perchlorate determination at nanomolar concentrations in vegetables. Food Chem 2017; 227:166-172. [DOI: 10.1016/j.foodchem.2017.01.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 01/16/2017] [Accepted: 01/16/2017] [Indexed: 10/20/2022]
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