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Kuhlmann L, Hiller J, Göen T. Comprehensive assessment of the UV-filter 2-ethylhexyl salicylate and its phase I/II metabolites in urine by extended enzymatic hydrolysis and on-line SPE LC-MS/MS. Talanta 2024; 276:126223. [PMID: 38728806 DOI: 10.1016/j.talanta.2024.126223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/25/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Abstract
2-ethylhexyl salicylate (EHS) is used as a UV filter in personal-care products, such as sunscreen, to prevent skin damage through UV radiation. The application of EHS-containing products leads to systemic EHS absorption, metabolization and excretion. To measure EHS and its corresponding metabolite levels in urine, a comprehensive analytical procedure based on an extended enzymatic hydrolysis, on-line-SPE, and UPLC-MS/MS was developed. The method covers a large profile of seven metabolites (including isomeric structures) as well as EHS itself in a run time only of 18 min. Easy sample preparation, consisting of a 2-h hydrolysis step, followed by on-line enrichment and purification, add to the efficiency of the method. An update, compared to a previous method for the determination of EHS and metabolites in urine, is that, during hydrolysis, both glucuronide and sulfate conjugates are considered. The method was furthermore applied to urine samples after a real-life exposure scenario to EHS-containing sunscreen. The method is highly sensitive with limits of detection ranging from 6 to 65 ng/L. Moreover, it is characterized by good precision data, accuracy, and robustness to matrix influences. Application of the method to urine samples following dermal exposure to an EHS-containing sunscreen revealed EHS as the main biomarker after dermal exposure, followed by the major biomarkers 5OH-EHS, 5cx-EPS, 4OH-EHS and 5oxo-EHS. The expansion and optimization of this method decisively contributes to the research on the dermal metabolism of EHS and can be applied in exposure studies and for human biomonitoring.
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Affiliation(s)
- Laura Kuhlmann
- Institute and Outpatient Clinic of Occupational, Social, and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestr. 9-11, 91054, Erlangen, Germany
| | - Julia Hiller
- Institute and Outpatient Clinic of Occupational, Social, and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestr. 9-11, 91054, Erlangen, Germany
| | - Thomas Göen
- Institute and Outpatient Clinic of Occupational, Social, and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestr. 9-11, 91054, Erlangen, Germany.
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Estévez-Danta A, Rodil R, Quintana JB, Montes R. Determination of the urinary concentrations of six bisphenols in public servants by online solid-phase extraction-liquid chromatography tandem mass spectrometry. Anal Bioanal Chem 2024; 416:4469-4480. [PMID: 38888603 PMCID: PMC11294393 DOI: 10.1007/s00216-024-05386-7] [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: 04/19/2024] [Revised: 05/30/2024] [Accepted: 06/03/2024] [Indexed: 06/20/2024]
Abstract
Bisphenols are widely used as monomers and additives in plastic production. Thus, bisphenol A (BPA) and its most prominent substitutes have been detected in many environmental and human samples. This study proposes an online solid-phase extraction analytical methodology coupled to liquid chromatography with tandem mass spectrometry for the determination of six bisphenols (BPA and bisphenols F (BPF), S (BPS), AF (BPAF), B (BPB), and E (BPE)) in urine samples as an efficient and automated methodology. The method was developed and validated for all bisphenols with good recoveries (92-112%) and repeatability (RSD ≤ 10%) despite the variable matrix effects, except BPAF (which would require a dedicated internal standard), achieving method quantification limits in the 0.05-2.2 ng mL-1 range. The methodology was subsequently applied to 435 urine samples from a non-occupational exposure population (civil servants for the regional government) from Santiago de Compostela (Galicia, Spain). Only BPA, BPF, and BPS were positively detected; the last two presented higher detection frequencies than BPA. When the urinary concentrations are extrapolated to human intake and compared to the European Food Safety Agency (EFSA) tolerable daily intake (TDI) of 2 × 10-4 µg kg-1 day-1 (TDI), all BPA positively identified samples would surpass this threshold. Although no TDI exists currently for the other two identified bisphenols, it is evident that human exposure to bisphenols should be limited. Finally, the results stratification by gender revealed higher levels of exposure to BPF in the women group.
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Affiliation(s)
- Andrea Estévez-Danta
- Aquatic One Health Research Center (ARCUS) & Department of Analytical Chemistry, Nutrition and Food Chemistry. R. Constantino Candeira S/N, IIAA Building, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
| | - Rosario Rodil
- Aquatic One Health Research Center (ARCUS) & Department of Analytical Chemistry, Nutrition and Food Chemistry. R. Constantino Candeira S/N, IIAA Building, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - José Benito Quintana
- Aquatic One Health Research Center (ARCUS) & Department of Analytical Chemistry, Nutrition and Food Chemistry. R. Constantino Candeira S/N, IIAA Building, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Rosa Montes
- Aquatic One Health Research Center (ARCUS) & Department of Analytical Chemistry, Nutrition and Food Chemistry. R. Constantino Candeira S/N, IIAA Building, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
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Useini A, Engelberger F, Künze G, Sträter N. Structural basis of the activation of PPARγ by the plasticizer metabolites MEHP and MINCH. ENVIRONMENT INTERNATIONAL 2023; 173:107822. [PMID: 36841188 DOI: 10.1016/j.envint.2023.107822] [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: 11/14/2022] [Revised: 01/20/2023] [Accepted: 02/11/2023] [Indexed: 06/18/2023]
Abstract
Di-2-ethylhexyl phthalate (DEHP) and its substitute 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) are widely used as plasticizers but may have adverse health effects. Via hydrolysis of one of the two ester bonds in the human body, DEHP and DINCH form the monoesters MEHP and MINCH, respectively. Previous studies demonstrated binding of these metabolites to PPARγ and the induction of adipogenesis via this pathway. Detailed structural understanding of how these metabolites interact with PPARγ and thereby affect human health is lacking until now. We therefore characterized the binding modes of MINCH and MEHP to the ligand binding domain of PPARγ by X-ray crystallography and molecular dynamics (MD) simulations. Both compounds bind to the activating function-2 (AF-2) binding site via an interaction of the free carboxylates with the histidines 323 and 449, tyrosine 473 and serine 289. The alkyl chains form hydrophobic interactions with the tunnel next to cysteine 285. These binding modes are generally stable as demonstrated by the MD simulations and they resemble the complexation of fatty acids and their metabolites to the AF-2 site of PPARγ. Similar to the situation for these natural PPARγ agonists, the interaction of the free carboxylate groups of MEHP and MINCH with tyrosine 473 and surrounding residues stabilizes the AF-2 helix in the upward conformation. This state promotes binding of coactivator proteins and thus formation of the active complex for transcription of the specific target genes. Moreover, a comparison of the residues involved in binding of the plasticizer metabolites in vertebrate PPARγ orthologs shows that these compounds likely have similar effects in other species.
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Affiliation(s)
- Abibe Useini
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany
| | - Felipe Engelberger
- Institute for Drug Discovery, Leipzig University, Brüderstraße 34, 04103 Leipzig, Germany
| | - Georg Künze
- Institute for Drug Discovery, Leipzig University, Brüderstraße 34, 04103 Leipzig, Germany.
| | - Norbert Sträter
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and Biomedicine, Leipzig University, Deutscher Platz 5, 04103 Leipzig, Germany.
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Vogel N, Frederiksen H, Lange R, Jørgensen N, Koch HM, Weber T, Andersson AM, Kolossa-Gehring M. Urinary excretion of phthalates and the substitutes DINCH and DEHTP in Danish young men and German young adults between 2000 and 2017 - A time trend analysis. Int J Hyg Environ Health 2023; 248:114080. [PMID: 36657282 DOI: 10.1016/j.ijheh.2022.114080] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 01/18/2023]
Abstract
Over the last twenty-five years it has become evident that exposure to several phthalates can have adverse effects on human health, such as endocrine disruption. This led to a series of EU regulations that resulted in a decrease in the production volumes of the restricted phthalates and an increased production of substitutes. The current study describes the impact of regulations and changes in production and use of phthalates and their substitutes on internal exposure patterns in two European populations since the beginning of the 2000'ies. Using harmonised data from young adults in Denmark (Danish Young Men Study, n = 1,063, spot urine) and Germany (Environmental Specimen Bank, n = 878, 24-h urine) with repeated cross-sectional design (3-11 cycles per biomarker) we applied Locally Estimated Scatterplot Smoothing (LOESS) and Generalized Linear Models (GLMs) to estimate time trends and the role of covariates on the trend (e.g. age, BMI). Time trends of daily excretion (μg/24h) are comparable between the two samples for the regulated (DEHP, BBzP, DiNP, DnBP, DiBP, DiDP/DPHP) as well as the non-regulated substances (DMP, DEP, DINCH, DEHTP) although the rate of change differ for some of the compounds. GLM results indicate that the daily excretion of the most regulated phthalates has decreased over time (DEHP yearly about 12-16%, BBzP 5%, DnBP 0.3-17%, and DiBP 4-12%). Interestingly, also the non-regulated phthalates DMP and DEP decreased by 6-18% per year. In sharp contrast, the phthalate substitutes DINCH and DEHTP show very steep annual increases (∼10-68% and ∼100%, respectively) between 2009 and 2017. We did not find an effect of age, sex, BMI, or education on the time trend. The present study provides comparable insights into how exposure to phthalates and two of their substitutes have changed over the last two decades in Germany and Denmark.
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Affiliation(s)
- Nina Vogel
- German Environment Agency (UBA), Berlin, Germany.
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Denmark
| | - Rosa Lange
- German Environment Agency (UBA), Berlin, Germany
| | - Niels Jørgensen
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Denmark
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr University Bochum (IPA), Bochum, Germany
| | - Till Weber
- German Environment Agency (UBA), Berlin, Germany
| | - Anna-Maria Andersson
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University Hospital - Rigshospitalet, Denmark
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Chen Q, Kong Q, Tian P, He Y, Zhao J, Zhang H, Wang G, Chen W. Lactic acid bacteria alleviate di-(2-ethylhexyl) phthalate-induced liver and testis toxicity via their bio-binding capacity, antioxidant capacity and regulation of the gut microbiota. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 305:119197. [PMID: 35378196 DOI: 10.1016/j.envpol.2022.119197] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/03/2021] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
Di-(2-ethylhexyl) phthalate (DEHP) is a plasticiser that, if absorbed into the human body, can cause various adverse effects including reproductive toxicity, liver toxicity and gut microbiota dysbiosis. So far, some studies have proved that the toxicity of DEHP can be reduced by using antioxidants. However, these candidates all show potential side effects and cannot prevent the accumulation of DEHP in the body, making them unable to be used as a daily dietary supplement to relieve the toxic effects of DEHP. Lactic acid bacteria (LAB) have antioxidant capacity and the ability to adsorb harmful substances. Herein, we investigated the protective effects of five strains of LAB, selected based on our in vitro assessments on antioxidant capacities or bio-binding capacities, against the adverse effects of DEHP exposure in rats. Our results showed that LAB strains with outstanding DEHP/MEHP binding capacities, Lactococcus lactis subsp. lactis CCFM1018 and Lactobacillus plantarum CCFM1019, possess the ability to facilitate the elimination of DEHP and its metabolite mono-(2-ethylhexyl) phthalate (MEHP) with the faeces, decrease DEHP and MEHP level in serum further. Meanwhile, DEHP-induced liver and testicular injuries were effectively alleviated by CCFM1018 and CCFM1019. In addition, CCFM1018 effectively alleviated the DEHP-induced oxidative stress with its strong antioxidant ability. Furthermore, both CCFM1018 and CCFM1019 modulated the gut microbiota, which in turn increased the concentrations of faecal propionate and butyrate and regulated the pathways related to host metabolism. Correlation analysis indicate that DEHP/MEHP bio-binding capacity of LAB plays a crucial role in protecting the body from DEHP exposure, and its antioxidant capacity and the ability to alleviate the gut microbiota dysbiosis are also involved in the alleviation of damage. Thus, LAB with powerful bio-binding capacity of DEHP and MEHP can be considered as a potential therapeutic dietary strategy against DEHP exposure.
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Affiliation(s)
- Qian Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China
| | - Qingmin Kong
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China
| | - Peijun Tian
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China
| | - Yufeng He
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou, 225004, PR China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou, 225004, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, PR China; Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi, 214122, PR China
| | - Gang Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; (Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou, 225004, PR China.
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China; National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, PR China
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6
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Proficiency and Interlaboratory Variability in the Determination of Phthalate and DINCH Biomarkers in Human Urine: Results from the HBM4EU Project. TOXICS 2022; 10:toxics10020057. [PMID: 35202244 PMCID: PMC8878211 DOI: 10.3390/toxics10020057] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/17/2021] [Accepted: 01/21/2022] [Indexed: 12/04/2022]
Abstract
A quality assurance/quality control program was implemented in the framework of the EU project HBM4EU to assess and improve the comparability of biomarker analysis and to build a network of competent laboratories. Four rounds of proficiency tests were organized for 15 phthalate and two DINCH urinary biomarkers (0.2–138 ng/mL) over a period of 18 months, with the involvement of 28 laboratories. A substantial improvement in performance was observed after the first round in particular, and by the end of the program, an average satisfactory performance rate of 90% was achieved. The interlaboratory reproducibility as derived from the participants’ results varied for the various biomarkers and rounds, with an average of 24% for the biomarkers of eight single-isomer phthalates (e.g., DnBP and DEHP) and 43% for the more challenging biomarkers of the mixed-isomer phthalates (DiNP, DiDP) and DINCH. When the reproducibility was based only on the laboratories that consistently achieved a satisfactory performance, this improved to 17% and 26%, respectively, clearly demonstrating the success of the QA/QC efforts. The program thus aided in building capacity and the establishment of a network of competent laboratories able to generate comparable and accurate HBM data for phthalate and DINCH biomarkers in 14 EU countries. In addition, global comparability was ensured by including external expert laboratories.
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Ringbeck B, Bury D, Hayen H, Weiss T, Brüning T, Koch HM. Determination of specific urinary nonylphenol metabolites by online-SPE-LC-MS/MS as novel human exposure biomarkers. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1177:122794. [PMID: 34098181 DOI: 10.1016/j.jchromb.2021.122794] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/18/2021] [Accepted: 05/21/2021] [Indexed: 11/19/2022]
Abstract
Nonylphenol (NP) is an endocrine disrupting and ecotoxic substance that has been detected in a variety of environmental matrices. It is utilized for the production of non-ionic nonylphenol ethoxylate (NPEO) detergents and other high production volume chemicals. Human biomonitoring data are scarce and mostly limited to the non-oxidized NP, which is ubiquitous in the (laboratory) environment and susceptible to external contamination. Here, we describe a sensitive, precise, accurate and rugged analytical method for the determination of OH-NP and oxo-NP, two potential alkyl-chain-oxidized metabolites of NP in human urine. We used single isomer standards, obtained by custom synthesis, for the quantification of the sum of the respective isomers. After enzymatic hydrolysis of potential urinary phase II conjugates, urine samples were analyzed by online turbulent flow chromatography for analyte enrichment and matrix depletion coupled to reversed phase liquid chromatography with negative electrospray-ionization triple quadrupole tandem mass spectrometry detection (online-SPE-LC-MS/MS). Quantification was performed by stable isotope dilution analysis. Limits of quantification in urinary matrix were 0.5 µg/L for OH-NP and 0.25 µg/L for oxo-NP. Mean relative recoveries were 101-105% (OH-NP) and 112-117% (oxo-NP) and the method imprecision (CV) in matrix was below 5%. In spite of extensive use restrictions in the EU since 2003, we could quantify OH-NP and oxo-NP in 94% and 47% of spot urine samples from the general German population (n = 32) collected in 2014. Thus, both metabolites seem suitable as sensitive and specific urinary biomarkers of NP exposure for future human biomonitoring population studies. Currently this method is used to quantitatively investigate human NP metabolism and to derive urinary metabolite excretion fractions that can be used to calculate external doses based on urinary biomarker concentrations.
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Affiliation(s)
- Benedikt Ringbeck
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum 44789, Germany.
| | - Daniel Bury
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum 44789, Germany.
| | - Heiko Hayen
- Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstraße 30, Münster 48149, Germany.
| | - Tobias Weiss
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum 44789, Germany.
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum 44789, Germany.
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum 44789, Germany.
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Lemke N, Murawski A, Lange R, Weber T, Apel P, Dębiak M, Koch HM, Kolossa-Gehring M. Substitutes mimic the exposure behaviour of REACH regulated phthalates - A review of the German HBM system on the example of plasticizers. Int J Hyg Environ Health 2021; 236:113780. [PMID: 34126298 DOI: 10.1016/j.ijheh.2021.113780] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 04/30/2021] [Accepted: 05/27/2021] [Indexed: 12/19/2022]
Abstract
The population is constantly exposed to potentially harmful substances present in the environment, including inter alia food and drinking water, consumer products, and indoor air. Human biomonitoring (HBM) is a valuable tool to determine the integral, internal exposure of the general population, including vulnerable subgroups, to provide the basis for risk assessment and policy advice. The German HBM system comprises of five pillars: (1) the development of suitable analytical methods for new substances of concern, (2) cross-sectional population-representative German Environmental Surveys (GerES), (3) time trend analyses using archived samples from the Environmental Specimen Bank (ESB), (4) the derivation of health-based guidance values as a risk assessment tool, and (5) transfer of data into the European cooperation network HBM4EU. The goal of this paper is to present the complementary elements of the German HBM system and to show its strengths and limitations on the example of plasticizers. Plasticizers have been identified by EU services and HBM4EU partners as priority substances for chemical policy at EU level. Using the complementary elements of the German HBM system, the internal exposure to classical phthalates and novel alternative plasticizers can be reliably monitored. It is shown that market changes, due to regulation of certain phthalates and the rise of substitutes, are rapidly reflected in the internal exposure of the population. It was shown that exposure to DEHP, DiBP, DnBP, and BBzP decreased considerably, whereas exposure to the novel substitutes such as DPHP, DEHTP, and Hexamoll®DINCH has increased significantly. While health-based guidance values for several phthalates (esp. DnBP, DiBP, DEHP) were exceeded quite often at the turn of the millennium, exceedances today have become rarer. Still, also the latest GerES reveals the ubiquitous and concurrent exposures to many plasticizers. Of concern is that the youngest children showed the highest exposures to most of the investigated plasticizers and in some cases their levels of DiBP and DnBP still exceeded health-based guidance values. Over the last years, mixture exposures are increasingly recognized as relevant, especially if the toxicological modes of action are similar. This is supported by a cumulative risk assessment for four endocrine active phthalates which confirms the still concerning cumulative exposure in many young children. Given the adverse health effects of some phthalates and the limited toxicological knowledge of substitutes, exposure reduction and surveillance are needed on German and EU-level. Substitutes need to be monitored, to intervene if exposures are threatening to exceed acceptable levels, or if new toxicological data question their appropriateness. It is strongly recommended to reconsider the use of plastics and plasticizers.
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Affiliation(s)
- Nora Lemke
- German Environment Agency (UBA), Berlin, Germany
| | | | - Rosa Lange
- German Environment Agency (UBA), Berlin, Germany
| | - Till Weber
- German Environment Agency (UBA), Berlin, Germany
| | - Petra Apel
- German Environment Agency (UBA), Berlin, Germany
| | | | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr-University Bochum, Germany
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Fréry N, Santonen T, Porras SP, Fucic A, Leso V, Bousoumah R, Duca RC, El Yamani M, Kolossa-Gehring M, Ndaw S, Viegas S, Iavicoli I. Biomonitoring of occupational exposure to phthalates: A systematic review. Int J Hyg Environ Health 2020; 229:113548. [PMID: 32659708 DOI: 10.1016/j.ijheh.2020.113548] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/08/2020] [Accepted: 04/22/2020] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Phthalates, a group of ubiquitous industrial chemicals, have been widely used in occupational settings, mainly as plasticizers in a variety of applications. Occupational exposure to different phthalates has been studied in several occupational settings using human biomonitoring (HBM). AIM To provide a comprehensive review of the available literature on occupational exposure to phthalates assessed using HBM and to determine future data needs on the topic as part of the HBM4EU project. METHODS A systematic search was carried out in the databases of Pubmed, Scopus, and Web of Science for articles published between 2000 and September 4, 2019 using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A total of 22 studies on the occupational HBM of phthalates was considered suitable for review. RESULTS AND DISCUSSION Among the reviewed studies, 19 (86%) focused on DEHP, an old phthalate that is now subject to authorization and planned to be restricted in the EU. Concentrations of MEHHP, one of its metabolites, varied up to 13-fold between studies and across sectors when comparing extreme geometric means, ranging from 11.6 (similar to the general populations) to 151 μg/g creatinine. Only 2 studies focused on newer phthalates such as DiNP and DPHP. Concerning the geographical distribution, 10 studies were performed in Europe (including 6 in Slovakia), 8 in Asia, and 4 in North America, but this distribution is not a good reflection of phthalate production and usage levels worldwide. Most HBM studies were performed in the context of PVC product manufacturing. Future studies should focus on: i) a more uniform approach to sampling timing to facilitate comparisons between studies; ii) newer phthalates; and iii) old phthalates in waste management or recycling. CONCLUSION Our findings highlight the lack of recent occupational HBM studies on both old and new phthalate exposure in European countries and the need for a harmonized approach. Considering the important policy actions taken in Europe regarding phthalates, it seems relevant to evaluate the impact of these actions on exposure levels and health risks for workers.
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Affiliation(s)
- Nadine Fréry
- Public Health France (SpFrance), 12 rue du Val d'Osne, 94415, Saint Maurice Cedex, France.
| | - Tiina Santonen
- Finnish Institute of Occupational Health (FIOH), P.O. Box 40, FI-00032, Työterveyslaitos, Finland
| | - Simo P Porras
- Finnish Institute of Occupational Health (FIOH), P.O. Box 40, FI-00032, Työterveyslaitos, Finland
| | - Aleksandra Fucic
- Institute for Medical Research and Occupational Health (IMROH), Ksaverska cesta 2, 10000, Zagreb, Croatia
| | - Veruscka Leso
- Department of Public Health (DPH), University of Naples Federico II, Via S. Pansini 5, 80131, Naples, Italy
| | - Radia Bousoumah
- French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1 rue du Morvan, 54519, Vandœuvre-Lès-Nancy, France
| | - Radu Corneliu Duca
- National Health Laboratory (LNS), Department of Health Protection, Unit Environmental Hygiene and Human Biological Monitoring, 1 rue Louis Rech, 3555, Dudelange, Luxembourg
| | - Mounia El Yamani
- Public Health France (SpFrance), 12 rue du Val d'Osne, 94415, Saint Maurice Cedex, France
| | - Marike Kolossa-Gehring
- Federal Environment Agency (UBA, Umweltbundesamt), Bismarckpl. 1, 14193, Berlin, Germany
| | - Sophie Ndaw
- French Research and Safety Institute for the Prevention of Occupational Accidents and Diseases (INRS), 1 rue du Morvan, 54519, Vandœuvre-Lès-Nancy, France
| | - Susana Viegas
- NOVA National School of Public Health, Public Health Research Centre, Universidade NOVA de Lisboa and Health & Technology Research Center, ESTeSL-IPL, Avenida Padre Cruz, 1600-560, Lisbon, Portugal
| | - Ivo Iavicoli
- Department of Public Health (DPH), University of Naples Federico II, Via S. Pansini 5, 80131, Naples, Italy
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10
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Martínez MA, Rovira J, Sharma RP, Schuhmacher M, Kumar V. Reconstruction of phthalate exposure and DINCH metabolites from biomonitoring data from the EXHES cohort of Tarragona, Spain: A case study on estimated vs reconstructed DEHP using the PBPK model. ENVIRONMENTAL RESEARCH 2020; 186:109534. [PMID: 32361526 DOI: 10.1016/j.envres.2020.109534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/12/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
Phthalates are known endocrine disruptors (EDs) and are associated with potential diseases, such as obesity and diabetes. In 2002, the plasticizer 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) was introduced as an alternative to phthalates in the European market. The objective of this study was to evaluate the total exposure to phthalate and DINCH metabolites from EXHES Tarragona, Spain cohort of pregnant women. On the one hand, the analytical determination of phthalate and DINCH metabolites in urine was carried out. On the other hand, the reconstructed exposure was calculated for phthalates and DINCH using their metabolites concentration measured in the urine. Thirteen different phthalate metabolites and two metabolites of DINCH were measured and detected in almost all pregnant women's urine samples (n = 60). There were significant correlations between metabolites of the same parent compounds, and also between DEHP and MBzP metabolites, DiNP and BBZP metabolites, and DEHP and DiNP metabolites respectively. The exposure of pregnant women to phthalate and DINCH parent compounds were also back calculated using the levels of each metabolite found in pregnant women urine (reconstructed exposure). Besides, to demonstrate the utility of this approach, the physiologically based pharmacokinetic (PBPK) model was used to predict the cumulative amount of MEHP (a principal metabolite of DEHP in urine). To proceed with that, DEHP reconstructed exposure and estimated exposure from the same cohort (previously studied by the same authors) were simulated using the PBPK model. Results showed that the reconstructed-PBPK simulation was closer to the 24 h biomonitoring data than the estimated PBPK-simulation., This clearly shows that the combination of reconstructed exposure with the PBPK model is a good tool to predict chemicals exposure. However, some discrepancies between simulated and biomonitored values were found. This can be associated with other sources that contribute to the total exposure and emphasises the need to consider multi-routes exposure for the widely distributed chemicals like phthalates and DINCH.
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Affiliation(s)
- M A Martínez
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain.
| | - J Rovira
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain; Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain.
| | - R Prasad Sharma
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain
| | - M Schuhmacher
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain; Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201, Reus, Catalonia, Spain.
| | - V Kumar
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007, Tarragona, Catalonia, Spain; IISPV, Hospital Universitari Sant Joan de Reus, Universitat Rovira I Virgili, Reus, Spain.
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11
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Ringbeck B, Bury D, Hayen H, Weiss T, Brüning T, Koch HM. Determination of di-n-butyl adipate (DnBA) metabolites as possible biomarkers of exposure in human urine by online-SPE-LC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1141:122029. [DOI: 10.1016/j.jchromb.2020.122029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/18/2022]
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12
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Schwedler G, Rucic E, Lange R, Conrad A, Koch HM, Pälmke C, Brüning T, Schulz C, Schmied-Tobies MIH, Daniels A, Kolossa-Gehring M. Phthalate metabolites in urine of children and adolescents in Germany. Human biomonitoring results of the German Environmental Survey GerES V, 2014-2017. Int J Hyg Environ Health 2020; 225:113444. [PMID: 32058939 DOI: 10.1016/j.ijheh.2019.113444] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/17/2019] [Accepted: 12/20/2019] [Indexed: 01/20/2023]
Abstract
During the population representative German Environmental Survey of Children and Adolescents (GerES V, 2014-2017) 2256 first-morning void urine samples from 3 to 17 years old children and adolescents were analysed for 21 metabolites of 11 different phthalates (di-methyl phthalate (DMP), di-ethyl phthalate (DEP), butylbenzyl phthalate (BBzP), di-iso-butyl phthalate (DiBP), di-n-butyl phthalate (DnBP), di-cyclohexyl phthalate (DCHP), di-n-pentyl phthalate (DnPeP), di-(2-ethylhexyl) phthalate (DEHP), di-iso-nonyl phthalate (DiNP), di-iso-decyl phthalate (DiDP) and di-n-octyl phthalate (DnOP)). Metabolites of DMP, DEP, BBzP, DiBP, DnBP, DEHP, DiNP and DiDP were found in 97%-100% of the participants, DCHP and DnPeP in 6%, and DnOP in none of the urine samples. Geometric means (GM) were highest for metabolites of DiBP (MiBP: 26.1 μg/L), DEP (MEP: 25.8 μg/L), DnBP (MnBP: 20.9 μg/L), and DEHP (cx-MEPP: 11.9 μg/L). For all phthalates but DEP, GMs were consistently higher in the 3-5 years old children than in the 14-17 years old adolescents. For DEHP, the age differences were most pronounced. All detectable phthalate biomarker concentrations were positively associated with the levels of the respective phthalate in house dust. In GerES V we found considerably lower phthalate biomarker levels than in the preceding GerES IV (2003-2006). GMs of biomarker levels in GerES V were only 18% (BBzP), 23% (MnBP), 23% (DEHP), 29% (MiBP) and 57% (DiNP) of those measured a decade earlier in GerES IV. However, some children and adolescents still exceeded health-based guidance values in the current GerES V. 0.38% of the participants had levels of DnBP, 0.08% levels of DEHP and 0.007% levels of DiNP which were higher than the respective health-based guidance values. Accordingly, for these persons an impact on health cannot be excluded with sufficient certainty. The ongoing and substantial exposure of vulnerable children and adolescents to many phthalates confirms the need of a continued monitoring of established phthalates, whether regulated or not, as well as of potential substitutes. With this biomonitoring approach we provide a picture of current individual and cumulative exposure developments and body burdens to phthalates, thus providing support for timely and effective chemicals policies and legislation.
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Affiliation(s)
| | - Enrico Rucic
- German Environment Agency (UBA), Berlin, Germany
| | - Rosa Lange
- German Environment Agency (UBA), Berlin, Germany
| | - André Conrad
- German Environment Agency (UBA), Berlin, Germany
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Claudia Pälmke
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | | | | | - Anja Daniels
- German Environment Agency (UBA), Berlin, Germany
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13
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Tankiewicz M, Olkowska E, Berg A, Wolska L. Advancement in Determination of Phthalate Metabolites by Gas Chromatography Eliminating Derivatization Step. Front Chem 2020; 7:928. [PMID: 32010672 PMCID: PMC6974799 DOI: 10.3389/fchem.2019.00928] [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: 10/24/2019] [Accepted: 12/19/2019] [Indexed: 11/13/2022] Open
Abstract
A gas chromatography-mass spectrometry (GC-MS) method to determine polar and thermally unstable phthalate metabolites [monomethyl phthalate-MMP, monoethyl phthalate-MEP, mono-n-butyl phthalate-MnBP, mono-(2-ethylhexyl) phthalate-MEHP] has been developed. This is the first report presenting the separation of monophthalates without derivatization step and any additional equipment or special injection port. Injection parameters (temperature, pressure, time, and volume of injection), chromatographic separation (retention gap, temperature program), and MS detection/identification (working parameters, ion selection) were investigated. Mechanisms and phenomena occurring under different conditions in the GC injector were evaluated and discussed. The limits of detection (LODs) of MMP, MEP, MnBP, MEHP in the protocol were 0.049, 0.036, 0.038, and 0.029 ng (per 2 μL of injection), respectively. The response of the monophthalates was found to be linear in the tested concentration range (for MMP: 0.15-100 ng, MEP and MnBP: 0.11-100 ng, MEHP: 0.087-100 ng per 2 μL) with the coefficient of determination higher than 0.9817 and inter-day precision in the range of 1.4-5.4%. The developed method is fast, easy and repeatable. Moreover, it allows for the elimination of derivatization agents, reduction of toxic waste production and simplification of analytical procedure.
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Affiliation(s)
- Maciej Tankiewicz
- Department of Environmental Toxicology, Faculty of Health Sciences With Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Ewa Olkowska
- Department of Environmental Toxicology, Faculty of Health Sciences With Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Andrzej Berg
- Department of Environmental Toxicology, Faculty of Health Sciences With Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Lidia Wolska
- Department of Environmental Toxicology, Faculty of Health Sciences With Institute of Maritime and Tropical Medicine, Medical University of Gdansk, Gdansk, Poland
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14
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Lee J, Ahn YA, Choi K, Park J, Moon HB, Choi G, Lee JJ, Suh E, Kim HJ, Eun SH, Kim GH, Cho G, Kim SK, Kim S, Kim SY, Kim S, Eom S, Choi S, Kim YD, Kim S. Bisphenol A in infant urine and baby-food samples among 9- to 15-month-olds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:133861. [PMID: 32380592 DOI: 10.1016/j.scitotenv.2019.133861] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 08/07/2019] [Accepted: 08/08/2019] [Indexed: 06/11/2023]
Abstract
Diet is the predominant source of bisphenol A (BPA) intake, but limited data are available on BPA levels in the diet of younger infants. This study investigated BPA levels in baby-food and urine samples collected from young infants (under 2 years old). Samples of homemade baby food (n = 210) and urine (n = 187) were collected at 9, 12, and 15 months after birth from a panel of Korean infants (n = 173). BPA levels in urine and food were measured using HPLC-MS/MS and GC-MS, respectively. BPA was above the limit of detection (LOD) in 85.5-85.7% of the urine samples and 32.5-76.3% of the baby-food samples. The median levels of BPA were 0.45 ng/g wet weight (IQR: not detectable to 5.16 ng/g wet weight) in homemade baby food, 0.93 μg/L (IQR: <LOD to 2.66 μg/L) in unadjusted urine samples, and 0.94 μg/L (IQR: <LOD to 2.80 μg/L) in urine samples adjusted for specific gravity. The BPA levels detected in this study were comparable or lower compared to previously reported levels of BPA in baby-food and infant urine samples. The BPA concentrations in the baby food of 15-month-old children (median: 5.09 ng/g) were significantly greater than those detected at 9 or 12 months of age (median: <LOD and 0.47 ng/g, respectively). Considering that the dietary changes from solid food with high water content to solid food as infants grew were accompanied by greater exposure to BPA, it is noteworthy that urinary BPA levels did not significantly differ according to infants' age. These results suggest that solid food with high water content did not drive the internal dose in younger infants, implying that there may have been other sources of exposure in their baby-food (other than weaning-food) and the environment, although further study would be needed to confirm this possibility.
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Affiliation(s)
- Jangwoo Lee
- School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Young-Ah Ahn
- School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Kyungho Choi
- School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Jeongim Park
- College of Natural Sciences, Soonchunhyang University, Asan, Republic of Korea
| | - Hyo-Bang Moon
- Department of Marine Sciences and Convergence Engineering, Hanyang University, Ansan, Republic of Korea
| | - Gyuyeon Choi
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Jeong Jae Lee
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Eunsook Suh
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Hai-Joong Kim
- College of Medicine, Korea University, Ansan, Republic of Korea
| | - So-Hee Eun
- College of Medicine, Korea University, Ansan, Republic of Korea
| | - Gun-Ha Kim
- College of Medicine, Korea University, Ansan, Republic of Korea
| | - Geumjoon Cho
- College of Medicine, Korea University, Ansan, Republic of Korea
| | - Sung Koo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Sungjoo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Su Young Kim
- College of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Seunghyo Kim
- College of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Soyong Eom
- College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Sooran Choi
- College of Medicine, Inha University, Incheon, Republic of Korea
| | - Young Don Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Sungkyoon Kim
- School of Public Health, Seoul National University, Seoul, Republic of Korea.
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15
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Jankowska A, Polańska K, Koch HM, Pälmke C, Waszkowska M, Stańczak A, Wesołowska E, Hanke W, Bose-O'Reilly S, Calamandrei G, Garí M. Phthalate exposure and neurodevelopmental outcomes in early school age children from Poland. ENVIRONMENTAL RESEARCH 2019; 179:108829. [PMID: 31677502 DOI: 10.1016/j.envres.2019.108829] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/06/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
Some phthalates are known endocrine disrupting chemicals (EDC). They are widely present in the environment thus their impact on children's health is of particular scientific interest. The aim of the study was to evaluate the association between phthalate exposure and neurodevelopmental outcomes, in particular behavioral, cognitive and psychomotor development, in 250 early school age children from the Polish Mother and Child Cohort (REPRO_PL). Urine samples were collected at the time of children's neurodevelopmental assessment and were analysed for 21 metabolites of 11 parent phthalates. Behavioral and emotional problems were assessed by the Strengths and Difficulties Questionnaire (SDQ) filled in by the mothers. To assess children's cognitive and psychomotor development, Polish adaptation of the Intelligence and Development Scales (IDS) was administered. The examination was performed by trained psychologists. Dimethyl phthalate (DMP) and di-n-butyl phthalate (DnBP) were the two phthalates showing the highest statistically significant associations, with higher total difficulties scores (β = 1.5, 95% CI 0.17; 2.7; β = 1.5, 95% CI 0.25; 2.8, respectively) as well as emotional symptoms and hyperactivity/inattention problems for DnBP (β = 0.46, 95% CI -0.024; 0.94; β = 0.72, 95% CI 0.065; 1.4, respectively), and peer relationships problems for DMP (β = 0.37, 95% CI -0.013; 0.76). In addition, DnBP and DMP have been found to be negatively associated with fluid IQ (β = -0.14, 95% CI -0.29; 0.0041) and crystallized IQ (β = -0.16, 95% CI -0.29; -0.025), respectively. In the case of mathematical skills, three phthalates, namely DMP (β = -0.17, 95% CI -0.31; -0.033), DEP (β = -0.16, 95% CI -0.29; -0.018) and DnBP (β = -0.14, 95% CI -0.28; 0.0012), have also shown statistically significant associations. This study indicates that exposure to some phthalates seems to be associated with adverse effects on behavioral and cognitive development of early school age children. Further action including legislation, educational and interventional activities to protect this vulnerable population is still needed.
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Affiliation(s)
- Agnieszka Jankowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Kinga Polańska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Claudia Pälmke
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Małgorzata Waszkowska
- Department of Health and Work Psychology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Aleksander Stańczak
- Department of Health and Work Psychology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Ewelina Wesołowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Stephan Bose-O'Reilly
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Gemma Calamandrei
- Centre for Behavioral Sciences and Mental Health, National Institute of Health (ISS), Rome, Italy
| | - Mercè Garí
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany; Institute of Computational Biology, German Research Center for Environmental Health, Helmholtz Zentrum München, Neuherberg, Germany.
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16
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Determination of human urinary metabolites of the plasticizer di(2-ethylhexyl) adipate (DEHA) by online-SPE-HPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1124:239-246. [DOI: 10.1016/j.jchromb.2019.06.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/16/2019] [Accepted: 06/15/2019] [Indexed: 11/30/2022]
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17
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van der Meer TP, van Faassen M, Frederiksen H, van Beek AP, Wolffenbuttel BHR, Kema IP, van Vliet-Ostaptchouk JV. Development and Interlaboratory Validation of Two Fast UPLC-MS-MS Methods Determining Urinary Bisphenols, Parabens and Phthalates. J Anal Toxicol 2019; 43:452-464. [PMID: 31044238 PMCID: PMC6655542 DOI: 10.1093/jat/bkz027] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/13/2019] [Indexed: 01/02/2023] Open
Abstract
People are constantly exposed to a wide variety of chemicals. Some of these compounds, such as parabens, bisphenols and phthalates, are known to have endocrine disrupting potencies. Over the years, these endocrine disrupting chemicals (EDCs) have been a rising cause for concern. In this study, we describe setup and validation of two methods to measure EDCs in human urine, using ultra-performance liquid chromatography tandem mass spectrometry. The phenol method determines methyl-, ethyl-, propyl-, n-butyl- and benzylparaben and bisphenol A, F and S. The phthalate method determines in total 13 metabolites of dimethyl, diethyl, diisobutyl, di-n-butyl, di(2-ethylhexyl), butylbenzyl, diiso-nonyl and diisodecyl phthalate. Runtime was 7 and 8 min per sample for phenols and phthalates, respectively. The methods were validated by the National Institute of Standards & Technology (NIST) for 13 compounds. In addition, EDCs were measured in forty 24-h urine samples, of which 12 EDCs were compared with the same samples measured in an established facility (Rigshospitalet, Copenhagen, Denmark). The intra-assay coefficient of variability (CV) was highest at 10% and inter-assay CV was highest at 12%. Recoveries ranged from 86 to 115%. The limit of detection ranged from 0.06 to 0.43 ng/mL. Of 21 compounds, 10 were detected above limit of detection in ≥93% of the samples. Eight compounds were in accordance to NIST reference concentrations. Differences in intercept were found for two compounds whereas slope differed for six compounds between our method and that used in the Danish facility. In conclusion, we set up and validated two high-throughput methods with very short runtime capable of measuring 5 parabens, 3 bisphenols and 13 different metabolites of 8 phthalates. Sensitivity of the phenol method was increased by using ammonium fluoride in the mobile phase.
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Affiliation(s)
- Thomas P van der Meer
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Martijn van Faassen
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Hanne Frederiksen
- Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - André P van Beek
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Bruce H R Wolffenbuttel
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Ido P Kema
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Jana V van Vliet-Ostaptchouk
- Department of Endocrinology, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
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18
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Garí M, Koch HM, Pälmke C, Jankowska A, Wesołowska E, Hanke W, Nowak D, Bose-O'Reilly S, Polańska K. Determinants of phthalate exposure and risk assessment in children from Poland. ENVIRONMENT INTERNATIONAL 2019; 127:742-753. [PMID: 31003057 DOI: 10.1016/j.envint.2019.04.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/01/2019] [Accepted: 04/03/2019] [Indexed: 06/09/2023]
Abstract
Phthalates are a group of widely used chemicals and humans are exposed to them in their daily life. Some phthalates may affect the hormonal balance in both children and adults. The aim of this study was to assess the phthalate exposure and its determinants among children at age of 7 years from the Polish Mother and Child Cohort Study (REPRO_PL). 250 urine samples collected in 2014-2015 were analysed for 21 metabolites of 11 parent phthalates using on-line high performance liquid chromatography coupled to tandem mass spectrometry (HPLC-MS/MS). This represents the most extensive set of phthalate metabolites ever determined for Poland. Ten metabolites were quantifiable in 100% of the samples, another eight in >90%. The highest median concentrations were found for the primary monoester metabolites of di-iso-butyl (MiBP, 72.4 μg/l), di-n-butyl (MnBP, 56.3 μg/l) and diethyl (MEP, 42.0 μg/l) phthalate, followed by the sum of di-2-ethylhexyl (ΣDEHP, 89.3 μg/l) and di-iso-nonyl (ΣDiNP, 21.9 μg/l) phthalate metabolites. Metabolite concentrations were higher in children at 7 years than in the same children at age 2 or in their mothers during pregnancy. Generally, phthalate exposures in this study were much higher than exposures reported in other European populations. Multivariate regression models showed that body mass index, place of residence, breastfeeding duration, socio-economic status and parental education were associated with the metabolite levels in the 7-year old children. Daily intake and hazard index calculations revealed that a small percentage of children (around 3-10%) exceeded the tolerable daily intakes established by international institutions such as EFSA and U.S. EPA indicating that these children might be at risk of anti-androgenic effects from the individual and cumulative exposure to phthalates. Thus, further monitoring of this population, by educational programs and follow-up interventions, is required.
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Affiliation(s)
- Mercè Garí
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany; Institute of Computational Biology, German Research Center for Environmental Health, Helmholtz Zentrum München, Neuherberg, Germany.
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Claudia Pälmke
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-University Bochum (IPA), Bochum, Germany
| | - Agnieszka Jankowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Ewelina Wesołowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
| | - Dennis Nowak
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Stephan Bose-O'Reilly
- Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Kinga Polańska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine (NIOM), Lodz, Poland
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19
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Sayıcı IU, Simsek Orhon F, Topçu S, Ulukol B, Baskan S. Preliminary study on bisphenol A levels and possible exposure history of mother and exclusively breastfed infant pairs. Eur J Pediatr 2019; 178:541-550. [PMID: 30707364 DOI: 10.1007/s00431-019-03329-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 10/27/2022]
Abstract
The aims of this study were to determine bisphenol A (BPA) levels in breast milk and urine specimens of healthy mother and exclusively breastfed infant pairs having no known BPA exposure, and also to examine the relationship between BPA levels and possible BPA exposure history. Forty mothers and their 1-2-month-old exclusively breastfeed infant were included in the study. The questionnaires about sociodemographic characteristics and possible BPA exposure history were filled out. Breast milk and urine samples were taken. BPA analyses of these samples were conducted using high-performance liquid chromatography coupled with mass spectrometry. All mother-infant pairs showed detectable BPA concentrations. The geometric means of BPA levels in breast milk, maternal urine, and infant urine were determined as 0.12 μg/L (0.03-0.59), 0.12 μg/L (0.03-0.73), and 0.13 μg/L (0.02-0.44), respectively. Infants whose mothers were consuming yoghurt in plastic containers had relatively higher urinary BPA levels (p = 0.00). Mothers consuming hot beverages in plastic glass showed higher breast milk BPA levels (p = 0.033). There were no statistical associations between BPA levels and the use of plastic materials and tools (p > 0.05).Conclusion: The measurable BPA concentrations in all breast milk specimens of healthy mothers may reflect possible exposure from dietary or non-dietary sources. Exclusively, breastfed healthy infants without any known BPA exposure may be exposed to BPA from their mothers through breastfeeding. What is Known: • Fetuses, neonates and infants are exposed to BPA from their mothers through placental transfer and breastfeeding. • Breast milk is considered a continuous low-level exposure to BPA. What is New: • BPA was detected in 100% of maternal urine, infant urine, and breast milk in healthy mother-infant pairs having no known BPA exposure. • The measurable amount of BPA in breast milk and infant urine may reflect possible BPA exposure of mother-infant pairs.
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Affiliation(s)
- Ilker Ufuk Sayıcı
- School of Medicine, Department of Pediatrics, Division of Social Pediatrics, Ankara University, Dikimevi, 06100, Ankara, Turkey
| | - Filiz Simsek Orhon
- School of Medicine, Department of Pediatrics, Division of Social Pediatrics, Ankara University, Dikimevi, 06100, Ankara, Turkey.
| | - Seda Topçu
- School of Medicine, Department of Pediatrics, Division of Social Pediatrics, Ankara University, Dikimevi, 06100, Ankara, Turkey
| | - Betul Ulukol
- School of Medicine, Department of Pediatrics, Division of Social Pediatrics, Ankara University, Dikimevi, 06100, Ankara, Turkey
| | - Sevgi Baskan
- School of Medicine, Department of Pediatrics, Division of Social Pediatrics, Ankara University, Dikimevi, 06100, Ankara, Turkey
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Pinguet J, Kerckhove N, Eljezi T, Lambert C, Moreau E, Bernard L, Boeuf B, Decaudin B, Genay S, Masse M, Storme L, Sautou V, Richard D. New SPE-LC-MS/MS method for the simultaneous determination in urine of 22 metabolites of DEHP and alternative plasticizers from PVC medical devices. Talanta 2019; 198:377-389. [PMID: 30876575 DOI: 10.1016/j.talanta.2019.01.115] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 01/15/2019] [Accepted: 01/17/2019] [Indexed: 11/29/2022]
Abstract
DiEthylHexylPhthalate (DEHP) can leach out of plasticized PVC medical devices (MD) and may enter into contact with patients. This phthalate is known for its reprotoxic and endocrine disrupting effects. Its use in medical devices (MD) has been restricted and alternative plasticizers have been developed. Nevertheless, no published clinical studies exist concerning patient exposure to these alternative plasticizers during medical care. This is particularly worrisome when high-risk populations, such as newborns, are exposed to these new plasticizers in intensive care units. Our study aimed to develop a novel sensitive and selective method to simultaneously identify and quantify DEHP and 17 other plasticizer metabolites (free or glucuronide conjugates), which are specific biomarkers of DEHTP, TOTM, DINP, DINCH and DEHA exposure in human urine. This robust method uses turbulent-flow online extraction technology coupled to high performance liquid chromatography - tandem mass spectrometry. Special care was taken to address two major problems in plasticizer analysis: contamination and chromatographic separation of interfering analogue structures. The validation was assessed in synthetic urine and the linearity of response was demonstrated for all compounds (R2 > 0.99), with limits of quantification from 0.01 to 0.1 ng/ml. Accuracies ranged from 86% to 117% and inter- and intra-day precisions were <20%. The clinical applicability and suitability of our new method was assessed in patients in a neonatal intensive care unit to measure urinary concentrations of DEHP and alternative plasticizer metabolites. These metabolites were found in the majority of urine samples, with a median detection frequency of 95.2% (ranging from 12.5% to 100%). The high sensitivity, selectivity and ruggedness make the method suitable for large-scale biomonitoring studies of high-risk and general populations.
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Affiliation(s)
- Jérémy Pinguet
- CHU Clermont-Ferrand, Université Clermont-Auvergne, service de Pharmacologie médicale, UMR INSERM 1107 Neuro-Dol, F-63000 Clermont-Ferrand, France.
| | - Nicolas Kerckhove
- CHU Clermont-Ferrand, Université Clermont-Auvergne, service de Pharmacologie médicale, UMR INSERM 1107 Neuro-Dol, F-63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Délégation Recherche Clinique & Innovation, F-63000 Clermont-Ferrand, France
| | - Teuta Eljezi
- CHU Clermont-Ferrand, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France; CHRU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - Céline Lambert
- CHU Clermont-Ferrand, Unité de Biostatistiques, Délégation Recherche Clinique & Innovation, F-63000 Clermont-Ferrand, France
| | - Emmanuel Moreau
- Université Clermont-Auvergne, INSERM U1240 Imagerie Moléculaire et Stratégies Théranostiques, F-63000 Clermont Ferrand, France
| | - Lise Bernard
- CHU Clermont-Ferrand, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Benoit Boeuf
- CHU Clermont-Ferrand, service de réanimation pédiatrique et périnatalogie, F-63000 Clermont-Ferrand, France
| | - Bertrand Decaudin
- Université Lille II, EA 7365 - GRITA, F-59000 Lille, France; CHRU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - Stéphanie Genay
- Université Lille II, EA 7365 - GRITA, F-59000 Lille, France; CHRU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - Morgane Masse
- Université Lille II, EA 7365 - GRITA, F-59000 Lille, France; CHRU Lille, Institut de Pharmacie, F-59000 Lille, France
| | - Laurent Storme
- CHRU Lille, Service de Médecine Néonatale, F-59000 Lille, France; Université Lille I, UPRES EA 4489, Laboratoire de Périnatalité et croissance, F-59000 Lille, France
| | - Valérie Sautou
- CHU Clermont-Ferrand, CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France
| | - Damien Richard
- CHU Clermont-Ferrand, Université Clermont-Auvergne, service de Pharmacologie médicale, UMR INSERM 1107 Neuro-Dol, F-63000 Clermont-Ferrand, France
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Analyzing terephthalate metabolites in human urine as biomarkers of exposure: Importance of selection of metabolites and deconjugation enzyme. J Chromatogr B Analyt Technol Biomed Life Sci 2018; 1100-1101:91-92. [DOI: 10.1016/j.jchromb.2018.09.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/27/2018] [Accepted: 09/28/2018] [Indexed: 11/23/2022]
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Bertoncello Souza M, Passoni MT, Pälmke C, Meyer KB, Venturelli AC, Araújo G, de Castilhos BS, Morais RN, Dalsenter PR, Swan SH, Koch HM, Martino-Andrade AJ. Unexpected, ubiquitous exposure of pregnant Brazilian women to diisopentyl phthalate, one of the most potent antiandrogenic phthalates. ENVIRONMENT INTERNATIONAL 2018; 119:447-454. [PMID: 30031264 DOI: 10.1016/j.envint.2018.06.042] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/13/2018] [Accepted: 06/30/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Human exposure to phthalates and other non-persistent chemicals in developing countries is largely unknown. A preliminary analysis of urinary samples from pregnant Brazilian women revealed the presence of metabolites of Diisopentyl phthalate (DiPeP). OBJECTIVES Reliably quantify DiPeP metabolites in human urine and investigate the potential antiandrogenic activity of this phthalate in rats. METHODS We initiated a pilot pregnancy cohort in Curitiba, Brazil, to examine phthalate exposure in urine samples collected in early pregnancy (n = 50) or pooled samples from early, mid and late pregnancy (n = 44). Our well established phthalate method was modified to include the primary DiPeP metabolite, monoisopentyl phthalate (MiPeP), and two additional secondary oxidized metabolites, 3OH-MiPeP and 4OH-MiPeP. In a parallel approach, we orally exposed pregnant rats to DiPeP or Di-n-butyl phthalate (DnBP; reference phthalate) at 0, 125, 250, and 500 mg/kg/day from gestation day 14 to 18 and measured ex vivo fetal testis testosterone production. RESULTS We were able to detect and quantify specific DiPeP metabolites in nearly all (98%) of the early pregnancy urine samples and in all gestational pool samples with a median concentration for MiPeP of 3.65 and 3.15 μg/L, respectively, and for the two oxidized metabolites between 1.00 and 1.70 μg/L. All three urinary DiPeP metabolites were strongly correlated (r = 0.89 to 0.99). In the rat model, the effective dose (mg/kg/day) inhibiting fetal testosterone production by 50% (ED50 [95% confidence interval]) was 93.6 [62.9-139.3] for DiPeP which was significantly lower than for DnBP (220.3 [172.9-280.7]), highlighting the strong antiandrogenic potency of DiPeP within the spectrum of the phthalates. CONCLUSIONS We unveiled and confirmed the exposure of pregnant Brazilian women to DiPeP via specific urinary metabolites. This unexpected and ubiquitous DiPeP exposure indicates to unique DiPeP exposure sources in Brazil. These exposures spark considerable concern because DiPeP is one of the most potent antiandrogenic phthalates.
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Affiliation(s)
| | | | - Claudia Pälmke
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Ruhr University Bochum, Bochum, Germany
| | - Katlyn Barp Meyer
- Department of Physiology, Federal University of Paraná, Curitiba, Brazil
| | | | - Giulia Araújo
- Department of Physiology, Federal University of Paraná, Curitiba, Brazil
| | | | | | | | - Shanna Helen Swan
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Holger Martin Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Ruhr University Bochum, Bochum, Germany
| | - Anderson Joel Martino-Andrade
- Department of Physiology, Federal University of Paraná, Curitiba, Brazil.; Department of Pharmacology, Federal University of Paraná, Curitiba, Brazil..
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23
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Salthammer T, Zhang Y, Mo J, Koch HM, Weschler CJ. Erfassung der Humanexposition mit organischen Verbindungen in Innenraumumgebungen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tunga Salthammer
- Fachbereich Materialanalytik und Innenluftchemie; Fraunhofer WKI; 38108 Braunschweig Bienroder Weg 54E Deutschland
| | - Yinping Zhang
- Department of Building Science; Tsinghua University; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control; Beijing 100084 PR China
| | - Jinhan Mo
- Department of Building Science; Tsinghua University; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control; Beijing 100084 PR China
| | - Holger M. Koch
- Institut für Prävention und Arbeitsmedizin der Deutschen Gesetzlichen Unfallversicherung (IPA); Institut der Ruhr-Universität Bochum; 44789 Bochum Bürkle-de-la-Camp Platz 1 Deutschland
| | - Charles J. Weschler
- Environmental and Occupational Health Sciences Institute (EOHSI); Rutgers University; 170 Frelinghuysen Road Piscataway NJ 08854 USA
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Salthammer T, Zhang Y, Mo J, Koch HM, Weschler CJ. Assessing Human Exposure to Organic Pollutants in the Indoor Environment. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201711023] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tunga Salthammer
- Department of Material Analysis and Indoor Chemistry; Fraunhofer WKI; 38108 Braunschweig Bienroder Weg 54E Germany
| | - Yinping Zhang
- Department of Building Science; Tsinghua University; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control; Beijing 100084 PR China
| | - Jinhan Mo
- Department of Building Science; Tsinghua University; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control; Beijing 100084 PR China
| | - Holger M. Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA); Institute of the Ruhr-University Bochum; 44789 Bochum Bürkle-de-la-Camp Platz 1 Germany
| | - Charles J. Weschler
- Environmental and Occupational Health Sciences Institute (EOHSI); Rutgers University; 170 Frelinghuysen Road Piscataway NJ 08854 USA
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25
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Kim JH, Lee J, Moon HB, Park J, Choi K, Kim SK, Kim S. Association of phthalate exposures with urinary free cortisol and 8-hydroxy-2'-deoxyguanosine in early childhood. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:506-513. [PMID: 29426173 DOI: 10.1016/j.scitotenv.2018.01.125] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 01/13/2018] [Accepted: 01/13/2018] [Indexed: 05/26/2023]
Abstract
Several studies suggested potential links of phthalates to stress-related outcomes. However, limited evidence has been available for the relationships between phthalate metabolites and free cortisol and 8-hydroxy-2'-deoxyguanosine (8-OHdG) in perinatal and postnatal environments. Therefore, we evaluated the relationships between phthalate metabolites and free cortisol and 8-OHdG in mother-child pairs. We repeatedly collected urine samples of 287 mother-child pairs from just before delivery to 15 months of age to measure the levels of four phthalate metabolites - mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP), mono-isobutyl phthalate (MiBP), and mono-n-butyl phthalate (MnBP) - and free cortisol and 8-OHdG. We used linear mixed effect models and generalized additive mixed models to estimate the relationship between the phthalate metabolites and free cortisol and 8-OHdG after adjusting for the child's gender, urine collection time, and maternal smoking status. The four phthalate metabolite levels were strongly correlated each other (all, p < .0001), and intra-class correlation for each metabolite in children ranged from 0.18 to 0.96. All four phthalate metabolites were positively associated with both free cortisol (MEHHP, β = 0.18 and p < .0001; MEOHP, β = 0.17 and p < .0001; MiBP, β = 0.13 and p = .0001; MnBP, β = 0.21 and p < .0001; and molar sum of metabolites, β = 0.21 and p < .0001) and 8-OHdG (MEHHP, β = 0.20 and p < .0001; MEOHP, β = 0.18 and p < .0001; MiBP, β = 0.23 and p < .0001; MnBP, β = 0.28 and p < .0001; and molar sum of metabolites, β = 0.29 and p < .0001) in childhood. Our findings suggest that phthalate exposures increase free cortisol and 8-OHdG levels in early childhood.
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Affiliation(s)
- Jin Hee Kim
- Department of Integrative Bioscience & Biotechnology, Sejong University, Seoul, Republic of Korea; Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Jangwoo Lee
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Hyo-Bang Moon
- Department of Marine Science and Convergence Engineering, Hanyang University, Ansan, Republic of Korea
| | - Jeongim Park
- College of Natural Sciences, Soonchunhyang University, Asan, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea; Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Sung Koo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Sungkyoon Kim
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea; Institute of Health and Environment, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.
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26
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Lee J, Choi K, Park J, Moon HB, Choi G, Lee JJ, Suh E, Kim HJ, Eun SH, Kim GH, Cho GJ, Kim SK, Kim S, Kim SY, Kim S, Eom S, Choi S, Kim YD, Kim S. Bisphenol A distribution in serum, urine, placenta, breast milk, and umbilical cord serum in a birth panel of mother-neonate pairs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 626:1494-1501. [PMID: 29146078 DOI: 10.1016/j.scitotenv.2017.10.042] [Citation(s) in RCA: 174] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 06/07/2023]
Abstract
Bisphenol A (BPA) exposure during the perinatal and postnatal periods increases the susceptibility to disease over the life cycle. However, information on the BPA delivered to fetuses or infants via the placenta and breastfeeding is limited. We determined the BPA exposure levels in various bodily fluids and tissues of pregnant women and described fetus and infant exposures to BPA based on associations and BPA ratios in mother-neonate paired samples. Maternal serum, urine, placenta, breast milk, cord serum, and neonatal urine samples were collected from 318 mother-neonate pairs at six university hospitals in Korea. BPA levels were detected using liquid chromatography tandem mass spectrometry. The ratios of the BPA levels in the other sample types to the levels in maternal serum were calculated. BPA was detected in 79.5-100% of the maternal and fetal samples. The median BPA concentration in the samples decreased in the order of neonatal urine (4.75ng/mL), maternal urine (2.86ng/mL), cord serum (1.71ng/mL), maternal serum (1.56ng/mL), breast milk (0.74ng/mL), and the placenta (0.53ng/g). We estimated the ratios of BPA levels in the other sample types to those in maternal serum. The median (95th percentile) cord serum-to-maternal serum ratio was 1.12 (15.2) for 160 mother-fetal pairs, in which BPA was detected in both samples. The placenta-, maternal urine-, neonatal urine-, and breast milk-to-maternal serum ratios were 0.28 (5.31), 1.79 (29.9), 1.98 (28.2), and 0.51 (10.5), respectively. In addition, the median (95th percentile) cord serum-to-placenta ratio was 4.03 (45.8), and the neonatal urine-to-cord serum ratio was 1.95 (25.6). The 95th percentile values were 14-20-fold greater than the medians. Urine contained the highest BPA concentrations, followed by serum, breast milk, and the placenta. The variations of BPA ratio show individual differences in the amounts of BPA delivered from mother to fetus.
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Affiliation(s)
- Jangwoo Lee
- Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Kyungho Choi
- Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Jeongim Park
- College of Natural Sciences, Soonchunhyang University, Asan, Republic of Korea
| | - Hyo-Bang Moon
- Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan, Republic of Korea
| | - Gyuyeon Choi
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Jeong Jae Lee
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Eunsook Suh
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Hai-Joong Kim
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - So-Hee Eun
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Gun-Ha Kim
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Geum Joon Cho
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Sung Koo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Sungjoo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Su Young Kim
- College of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Seunghyo Kim
- College of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Soyong Eom
- College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Sooran Choi
- College of Medicine, Inha University, Incheon, Republic of Korea
| | - Young Don Kim
- Department of Pediatrics, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Republic of Korea
| | - Sungkyoon Kim
- Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea.
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27
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Comprehensive monitoring of specific metabolites of tri-(2-ethylhexyl) trimellitate (TEHTM) in urine by column-switching liquid chromatography-tandem mass spectrometry. Anal Bioanal Chem 2018; 410:4343-4357. [DOI: 10.1007/s00216-018-1086-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/21/2018] [Accepted: 04/13/2018] [Indexed: 11/30/2022]
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28
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Obesity or diet? Levels and determinants of phthalate body burden – A case study on Portuguese children. Int J Hyg Environ Health 2018; 221:519-530. [DOI: 10.1016/j.ijheh.2018.02.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/01/2018] [Accepted: 02/01/2018] [Indexed: 02/06/2023]
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Lessmann F, Bury D, Weiss T, Hayen H, Brüning T, Koch HM. De-novo identification of specific exposure biomarkers of the alternative plasticizer di(2-ethylhexyl) terephthalate (DEHTP) after low oral dosage to male volunteers by HPLC-Q-Orbitrap-MS. Biomarkers 2018; 23:196-206. [DOI: 10.1080/1354750x.2017.1410856] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Frederik Lessmann
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
- Institute for Occupational and Maritime Medicine (ZfAM), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Daniel Bury
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
| | - Tobias Weiss
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
| | - Heiko Hayen
- Institute of Inorganic and Analytical Chemistry, University of Münster, Münster, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
| | - Holger M. Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bochum, Germany
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30
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Bury D, Belov VN, Qi Y, Hayen H, Volmer DA, Brüning T, Koch HM. Determination of Urinary Metabolites of the Emerging UV Filter Octocrylene by Online-SPE-LC-MS/MS. Anal Chem 2017; 90:944-951. [DOI: 10.1021/acs.analchem.7b03996] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Daniel Bury
- Institute
for Prevention and Occupational Medicine of the German Social Accident
Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz
1, 44789 Bochum, Germany
| | - Vladimir N. Belov
- Max Planck Institute for Biophysical Chemistry (MPI BPC), Facility for Synthetic Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Yulin Qi
- Institute
of Bioanalytical Chemistry, Saarland University, Campus B2.2, 66123 Saarbrücken, Germany
| | - Heiko Hayen
- Institute
of Inorganic and Analytical Chemistry, University of Münster, Corrensstraße
30, 48149 Münster, Germany
| | - Dietrich A. Volmer
- Institute
of Bioanalytical Chemistry, Saarland University, Campus B2.2, 66123 Saarbrücken, Germany
| | - Thomas Brüning
- Institute
for Prevention and Occupational Medicine of the German Social Accident
Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz
1, 44789 Bochum, Germany
| | - Holger M. Koch
- Institute
for Prevention and Occupational Medicine of the German Social Accident
Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz
1, 44789 Bochum, Germany
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31
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Lessmann F, Correia-Sá L, Calhau C, Domingues VF, Weiss T, Brüning T, Koch HM. Exposure to the plasticizer di(2-ethylhexyl) terephthalate (DEHTP) in Portuguese children - Urinary metabolite levels and estimated daily intakes. ENVIRONMENT INTERNATIONAL 2017; 104:25-32. [PMID: 28407489 DOI: 10.1016/j.envint.2017.03.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/27/2017] [Accepted: 03/31/2017] [Indexed: 05/16/2023]
Abstract
Classical ortho-phthalate plasticizers are, due to their endocrine disrupting potency and reproductive toxicity, increasingly replaced by alternative plasticizers. Di(2-ethylhexyl) terephthalate (DEHTP) is one of these substitutes. In this study, we investigated DEHTP exposure in 107 Portuguese children (4-17years old) by analyzing specific DEHTP metabolites in their urine using a newly developed LC-MS/MS method. We could detect the major, specific DEHTP metabolite mono(2-ethyl-5-carboxypentyl) terephthalate (5cx-MEPTP) in 100% of the samples with levels above the limit of quantification in 96% of the samples (median concentration 4.19μg/L; 95th percentile 26.4μg/L; maximum 3400μg/L). Other minor DEHTP metabolites (5OH-MEHTP, 5oxo-MEHTP and 2cx-MMHTP) were detected at lower rates and levels. Daily DEHTP intakes calculated from urinary 5cx-MEPTP levels were generally far below the tolerable daily intake (TDI) of 1000μg/kgbw/d (median 0.67μg/kgbw/d; 95th percentile 6.25μg/kgbw/d; maximum 690μg/kgbw/d). However, for one child the biomarker-derived health-based guidance value (HBM-I value) for 5cx-MEPTP of 1800μg/L was exceeded by about a factor of two. Levels of 5cx-MEPTP and calculated daily DEHTP intakes were higher in normal/under-weight children who nourished on their usual diet compared to overweight/obese children who received nutritional guidance with fresh and unprocessed food (p=0.043 and p<0.001 respectively). This indicates to processed and fatty foodstuff as a major source of DEHTP exposure. Additionally, we found children of lower age having higher DEHTP intakes (p=0.045). Again, foodstuff as a major DEHTP source, together with other child specific DEHTP sources such as mouthing of toys or ingestion of dust might be contributing factors. With the present study, we provide a first data set on the omnipresent DEHTP exposure in children. So far, general levels of DEHTP exposure seem no cause for concern. However, due to the increasing use of DEHTP as an ortho-phthalate substitute, possible increasing exposures in the future should be followed closely.
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Affiliation(s)
- Frederik Lessmann
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Luísa Correia-Sá
- REQUIMTE/LAQV-GRAQ, Instituto Superior de Engenharia do Porto do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal; Centro de Investigação em Tecnologias e Sistemas de Informação em Saúde (CINTESIS), Centro de Investigação Médica, 2° piso, edif. Nascente, Faculdade de Medicina da Universidade do Porto, Rua Dr Plácido da Costa s/n, 4200-450 Porto, Portugal
| | - Conceição Calhau
- Centro de Investigação em Tecnologias e Sistemas de Informação em Saúde (CINTESIS), Centro de Investigação Médica, 2° piso, edif. Nascente, Faculdade de Medicina da Universidade do Porto, Rua Dr Plácido da Costa s/n, 4200-450 Porto, Portugal
| | - Valentina F Domingues
- REQUIMTE/LAQV-GRAQ, Instituto Superior de Engenharia do Porto do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal
| | - Tobias Weiss
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany.
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Solid phase extraction using molecular imprinted polymers for phthalate determination in water and wine samples by HPLC-ESI-MS. Microchem J 2017. [DOI: 10.1016/j.microc.2017.02.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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González-Mariño I, Rodil R, Barrio I, Cela R, Quintana JB. Wastewater-Based Epidemiology as a New Tool for Estimating Population Exposure to Phthalate Plasticizers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:3902-3910. [PMID: 28240866 DOI: 10.1021/acs.est.6b05612] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
This study proposes the monitoring of phthalate metabolites in wastewater as a nonintrusive and economic alternative to urine analysis for estimating human exposure to phthalates. To this end, a solid-phase extraction-liquid chromatography-tandem mass spectrometry method was developed, allowing for the determination of eight phthalate metabolites in wastewater (limits of quantification between 0.5 and 32 ng L-1). The analysis of samples from the NW region of Spain showed that these substances occur in raw wastewater up to ca. 1.6 μg L-1 and in treated wastewater up to ca. 1 μg L-1. Concentrations in raw wastewater were converted into levels of exposure to six phthalate diesters. For two of them, these levels were always below the daily exposure thresholds recommended by the U.S. Environmental Protection Agency and the European Food Safety Authority. For the other four, however, estimates of exposure surpassed such a threshold (especially the toddler threshold) in some cases, highlighting the significance of the exposure to phthalates in children. Finally, concentrations in wastewater were also used to estimate metabolite concentrations in urine, providing a reasonable concordance between our results and the data obtained in two previous biomonitoring studies.
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Affiliation(s)
- Iria González-Mariño
- Department of Analytical Chemistry, Nutrition and Food Sciences, IIAA - Institute for Food Analysis and Research, University of Santiago de Compostela , Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Rosario Rodil
- Department of Analytical Chemistry, Nutrition and Food Sciences, IIAA - Institute for Food Analysis and Research, University of Santiago de Compostela , Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Iván Barrio
- Department of Analytical Chemistry, Nutrition and Food Sciences, IIAA - Institute for Food Analysis and Research, University of Santiago de Compostela , Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Rafael Cela
- Department of Analytical Chemistry, Nutrition and Food Sciences, IIAA - Institute for Food Analysis and Research, University of Santiago de Compostela , Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - José Benito Quintana
- Department of Analytical Chemistry, Nutrition and Food Sciences, IIAA - Institute for Food Analysis and Research, University of Santiago de Compostela , Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
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Chang JW, Lee CC, Pan WH, Chou WC, Huang HB, Chiang HC, Huang PC. Estimated Daily Intake and Cumulative Risk Assessment of Phthalates in the General Taiwanese after the 2011 DEHP Food Scandal. Sci Rep 2017; 7:45009. [PMID: 28327585 PMCID: PMC5361203 DOI: 10.1038/srep45009] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 02/20/2017] [Indexed: 01/06/2023] Open
Abstract
A food scandal occurred in Taiwan in 2011 because the DEHP (di-2-ethylhexyl phthalate) had been intentionally used in food products. We assessed the daily intakes (DIs) and cumulative risk of phthalates in Taiwan’s general population after the scandal. The DIs of 6 phthalates, including di-n-butyl phthalate (DnBP), di-iso-butyl phthalate (DiBP), and DEHP, were evaluated using urinary phthalate metabolites. Hazard quotients of phthalates classified as affecting the reproductive (HQrep) and hepatic (HQhep) systems were assessed using cumulative approach. The creatinine-based model showed that the highest DI values in children 7-to 12- years-old were for DEHP (males: median: 4.79 μg/kg bw/d; females: median: 2.62 μg/kg bw/d). The 95th percentile (P95) of HQrep values were all >1 in the 7- to 12-year-old and 18- to 40-year-old male groups. The P95 of HQhep values were all >1 in the 7- to 18- year-old male groups. Most of the HQrep was attributable to the HQs of DnBP and DiBP (53.9–84.7%), and DEHP contributed most to HQhep (83.1–98.6%), which reveals that DnBP, DiBP and DEHP were the main risk of phthalate exposure for Taiwanese. Taiwan’s general population is widely exposed to DnBP, DiBP and DEHP, especially for young children.
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Affiliation(s)
- Jung-Wei Chang
- Research Center for Environmental Trace Toxic Substances, National Cheng Kung University, Tainan, Taiwan
| | - Ching-Chang Lee
- Research Center for Environmental Trace Toxic Substances, National Cheng Kung University, Tainan, Taiwan.,Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wen-Harn Pan
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Division of Preventive Medicine and Health Service Research, Institute of Population Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Wei-Chun Chou
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Han-Bin Huang
- School of Public Health, National Defense Medical Center, Taipei, Taiwan
| | - Hung-Che Chiang
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Po-Chin Huang
- National Environmental Health Research Center, National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan.,Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Safety, Health and Environmental Engineering, National United University, Miaoli, Taiwan
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Yoshida T. Analytical method for urinary metabolites as biomarkers for monitoring exposure to phthalates by gas chromatography/mass spectrometry. Biomed Chromatogr 2017; 31. [PMID: 27925246 DOI: 10.1002/bmc.3910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 11/21/2016] [Accepted: 11/30/2016] [Indexed: 01/03/2023]
Abstract
Phthalates, widely used as plasticizers, have been detected in indoor air, but there have been few reports on methods of analyzing urinary metabolites as biomarkers to monitor exposure to di-n-pentyl phthalate or di-n-hexyl phthalate. Presented here is a cost-effective and sensitive analytical method for the determination of urinary metabolites of phthalates containing these two compounds. Nine urinary phthalate metabolites were enzymatically hydrolyzed and extracted with toluene: monomethyl phthalate, monoethyl phthalate, monoisobutyl phthalate, mono-n-butyl phthalate, mono-n-pentyl phthalate, mono-n-hexyl phthalate, monocyclohexyl phthalate, monobenzyl phthalate and mono(2-ethyl-5-carboxypentyl) phthalate. After transformation to their tert-butyldimethylsilyl derivatives, they were analyzed by gas chromatography/mass spectrometry in the electron impact ionization mode. The calibration curves for the metabolites were linear at urinary concentrations of up to 30 μg/L, showing that they could be determined accurately and precisely (detection limits 0.1-0.4 μg/L, quantification limits 0.3-1.3 μg/L). The urine samples collected could be stored for up to 1 month at -20°C. The proposed analytical method was used to examine urine samples from seven healthy volunteers. This method should be useful for monitoring phthalate exposure in the general population.
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Hollow fiber liquid-phase microextraction-gas chromatography-mass spectrometry method to analyze bisphenol A and other plasticizer metabolites. J Chromatogr A 2017; 1481:31-36. [DOI: 10.1016/j.chroma.2016.12.043] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 12/06/2016] [Accepted: 12/15/2016] [Indexed: 01/19/2023]
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Tsochatzis ED, Tzimou-Tsitouridou R, Gika HG. Analytical Methodologies for the Assessment of Phthalate Exposure in Humans. Crit Rev Anal Chem 2016; 47:279-297. [DOI: 10.1080/10408347.2016.1273754] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Emmanouil D. Tsochatzis
- Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - R. Tzimou-Tsitouridou
- Analytical Chemistry Laboratory, Department of Chemical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Helen G. Gika
- Laboratory of Forensic Medicine & Toxicology, Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Koch HM, Rüther M, Schütze A, Conrad A, Pälmke C, Apel P, Brüning T, Kolossa-Gehring M. Phthalate metabolites in 24-h urine samples of the German Environmental Specimen Bank (ESB) from 1988 to 2015 and a comparison with US NHANES data from 1999 to 2012. Int J Hyg Environ Health 2016; 220:130-141. [PMID: 27863804 DOI: 10.1016/j.ijheh.2016.11.003] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 10/11/2016] [Accepted: 11/07/2016] [Indexed: 11/30/2022]
Abstract
The German Environmental Specimen Bank (ESB) continuously collects 24-h urine samples since the early 1980s in Germany. In this study we analyzed 300 urine samples from the years 2007 to 2015 for 21 phthalate metabolites (representing exposure to 11 parent phthalates) and combined the data with two previous retrospective measurement campaigns (1988 to 2003 and 2002 to 2008). The combined dataset comprised 1162 24-h urine samples spanning the years 1988 to 2015. With this detailed set of human biomonitoring data we describe the time course of phthalate exposure in Germany over a time frame of 27 years. For the metabolites of the endocrine disrupting phthalates di(2-ethylhexyl) phthalate (DEHP), di-n-butyl phthalate (DnBP) and butylbenzyl phthalate (BBzP) we observed a roughly ten-fold decline in median metabolite levels from their peak levels in the late 1980s/early 1990s compared to most recent levels from 2015. Probably, bans (first enacted in 1999) and classifications/labelings (enacted in 2001 and 2004) in the European Union lead to this drop. A decline in di-isobutyl phthalate (DiBP) metabolite levels set in only quite recently, possibly due to its later classification as a reproductive toxicant in the EU in 2009. In a considerable number of samples collected before 2002 health based guidance values (BE, HBM I) have been exceeded for DnBP (27.2%) and DEHP (2.3%) but also in recent samples some individual exceedances can still be observed (DEHP 1.0%). A decrease in concentration for all low molecular weight phthalates, labelled or not, was seen in the most recent years of sampling. For the high molecular weight phthalates, DEHP seems to have been substituted in part by di-isononyl phthalate (DiNP), but DiNP metabolite levels have also been declining in the last years. Probably, non-phthalate alternatives increasingly take over for the phthalates in Germany. A comparison with NHANES (National Health and Nutrition Examination Survey) data from the United States covering the years 1999 to 2012 revealed both similarities and differences in phthalate exposure between Germany and the US. Exposure to critical phthalates has decreased in both countries with metabolite levels more and more aligning with each other, but high molecular weight phthalates substituting DEHP (such as DiNP) seem to become more important in the US than in Germany.
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Affiliation(s)
- Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1 Bochum, Germany.
| | - Maria Rüther
- German Environment Agency (UBA), Corrensplatz 1, Berlin, Germany
| | - André Schütze
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1 Bochum, Germany
| | - André Conrad
- German Environment Agency (UBA), Corrensplatz 1, Berlin, Germany
| | - Claudia Pälmke
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1 Bochum, Germany
| | - Petra Apel
- German Environment Agency (UBA), Corrensplatz 1, Berlin, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance - Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1 Bochum, Germany
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Phthalate Metabolites, Consumer Habits and Health Effects. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13070717. [PMID: 27428989 PMCID: PMC4962258 DOI: 10.3390/ijerph13070717] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/08/2016] [Accepted: 07/13/2016] [Indexed: 01/05/2023]
Abstract
Phthalates are multifunctional chemicals used in a wide variety of consumer products. The aim of this study was to investigate whether levels of urinary phthalate metabolites in urine samples of Austrian mothers and their children were associated with consumer habits and health indicators. Within an Austrian biomonitoring survey, urine samples from 50 mother-child pairs of five communities (two-stage random stratified sampling) were analysed. The concentrations of 14 phthalate metabolites were determined, and a questionnaire was administered. Monoethyl phthalate (MEP), mono-n-butyl phthalate (MnBP), mono-isobutyl phthalate (MiBP), monobenzyl phthalate (MBzP), mono-(2-ethylhexyl) phthalate (MEHP), mono-(2-ethyl-5-hydroxyhexyl) phthalate (5OH-MEHP), mono-(2-ethyl-5-oxohexyl) phthalate (5oxo-MEHP), mono-(5-carboxy-2-ethylpentyl) phthalate (5cx-MEPP), and 3-carboxy-mono-propyl phthalate (3cx-MPP) could be quantified in the majority of samples. Significant correlations were found between the use of hair mousse, hair dye, makeup, chewing gum, polyethylene terephthalate (PET) bottles and the diethyl phthalate (DEP) metabolite MEP. With regard to health effects, significant associations of MEP in urine with headache, repeated coughing, diarrhoea, and hormonal problems were observed. MBzP was associated with repeated coughing and MEHP was associated with itching.
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Lessmann F, Schütze A, Weiss T, Langsch A, Otter R, Brüning T, Koch HM. Metabolism and urinary excretion kinetics of di(2-ethylhexyl) terephthalate (DEHTP) in three male volunteers after oral dosage. Arch Toxicol 2016; 90:1659-67. [PMID: 27116293 DOI: 10.1007/s00204-016-1715-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 04/14/2016] [Indexed: 11/26/2022]
Abstract
Di(2-ethylhexyl) terephthalate (DEHTP) is used as a substitute for di(2-ethylhexyl) phthalate (DEHP), an ortho-phthalate-based plasticizer that is classified and labeled due to its toxicity to reproduction. In this study the metabolism and urinary excretion kinetics of DEHTP were investigated by single oral dosage of 50 mg DEHTP to three male volunteers (resulting in individual dosages between 0.55 and 0.59 mg/kg body weight). Separate urine samples were consecutively collected for 48 h. In analogy to DEHP, we quantified specific side-chain-oxidized monoester metabolites of DEHTP (5OH-MEHTP, 5oxo-MEHTP, 5cx-MEPTP and 2cx-MMHTP) by HPLC-MS/MS with online sample clean-up and isotope dilution. All postulated metabolites were detectable in all samples after dosage. The predominant, specific urinary metabolite was 5cx-MEPTP representing about 13.0 % of the applied dose as mean of the three volunteers (range 7.0-20.4 %) in urine, followed by 5OH-MEHTP (mean: 1.8 %; range 1.3-2.4 %) and 5oxo MEHTP (mean: 1.0 %; range 0.6-1.6 %). 2cx-MMHTP was a minor metabolite representing only 0.3 % (range 0.2-0.4 %). In total, about 16.1 % of the dose was recovered in urine as the above investigated specific metabolites within 48 h with the major share (95 %) being excreted within the first 24 h. Investigation of the glucuronidation patterns revealed that the carboxy-metabolites are excreted almost completely in their free form (>90 %), whereas for 5OH-MEHTP and 5oxo-MEHTP, glucuronidation is preferred (>70 %). With this study we provide reliable urinary excretion factors to calculate DEHTP intakes based on metabolite concentrations in environmental and occupational studies.
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Affiliation(s)
- Frederik Lessmann
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - André Schütze
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Tobias Weiss
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | | | | | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany.
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Kim JH, Park H, Lee J, Cho G, Choi S, Choi G, Kim SY, Eun SH, Suh E, Kim SK, Kim HJ, Kim GH, Lee JJ, Kim YD, Eom S, Kim S, Moon HB, Park J, Choi K, Kim S, Kim S. Association of diethylhexyl phthalate with obesity-related markers and body mass change from birth to 3 months of age. J Epidemiol Community Health 2016; 70:466-72. [PMID: 26834143 PMCID: PMC4862064 DOI: 10.1136/jech-2015-206315] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Accepted: 11/07/2015] [Indexed: 11/03/2022]
Abstract
BACKGROUND Several studies have suggested potential links of phthalates to obesity in children and adults. Limited evidence, however, has been available for the relations between diethylhexyl phthalate (DEHP) and obesity-related markers or body mass change in early life. METHODS 128 healthy pregnant women were recruited and, after delivery, their newborns' first urine and umbilical cord blood samples were collected. We measured urinary levels of two DEHP metabolites, mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) and mono-(2-ethyl-5-oxohexyl) phthalate (MEOHP). We also measured the levels of leptin, total cholesterol and triglyceride (TG) in cord serum, and used them along with weight, length, head circumference and ponderal index (PI, 100 g/cm(3)) at birth, as obesity-related markers, and estimated the relations between DEHP metabolites and obesity-related markers using generalised linear models. For the evaluation of body mass increase by early life DEHP exposure, body mass index (BMI) z-score change during 3 months after birth by DEHP metabolites in the first urine samples of the newborns were evaluated using logistic regression. RESULTS DEHP exposure was associated with decrease of PI and increase of TG (PI, β=-0.11, p=0.070 and TG, β=0.14, p=0.027), especially for boys (PI, β=-0.13, p=0.021; and TG, β=0.19, p=0.025). Moreover, DEHP exposure was positively associated with body mass increase during 3 months after birth (change of BMI z-scores, OR=4.35, p=0.025). CONCLUSIONS Our findings suggest that DEHP exposure may affect body mass change in early life through changes of obesity-related markers.
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Affiliation(s)
- Jin Hee Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Hyunkyung Park
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Jangwoo Lee
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Geumjoon Cho
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Sooran Choi
- College of Medicine, Inha University, Incheon, Republic of Korea College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Gyuyeon Choi
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Su Young Kim
- Jeju National University School of Medicine, Jeju, Republic of Korea
| | - So-Hee Eun
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Eunsook Suh
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Sung Koo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Hai-Joong Kim
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Gun-Ha Kim
- College of Medicine, Korea University, Seoul, Republic of Korea
| | - Jeong Jae Lee
- College of Medicine, Soonchunhyang University, Seoul, Republic of Korea
| | - Young Don Kim
- Jeju National University School of Medicine, Jeju, Republic of Korea
| | - Soyong Eom
- College of Medicine, Yonsei University, Seoul, Republic of Korea
| | - Seunghyo Kim
- Jeju National University School of Medicine, Jeju, Republic of Korea
| | - Hyo-Bang Moon
- Department of Marine Sciences and Convergent Technology, Hanyang University, Ansan, Republic of Korea
| | - Jeongim Park
- College of Natural Sciences, Soonchunhyang University, Asan, Republic of Korea
| | - Kyungho Choi
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
| | - Sungjoo Kim
- College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Sungkyoon Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Republic of Korea
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Determination of metabolites of di(2-ethylhexyl) terephthalate (DEHTP) in human urine by HPLC-MS/MS with on-line clean-up. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1011:196-203. [DOI: 10.1016/j.jchromb.2015.12.042] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 12/07/2015] [Accepted: 12/19/2015] [Indexed: 02/02/2023]
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Heffernan AL, Thompson K, Eaglesham G, Vijayasarathy S, Mueller JF, Sly PD, Gomez MJ. Rapid, automated online SPE-LC-QTRAP-MS/MS method for the simultaneous analysis of 14 phthalate metabolites and 5 bisphenol analogues in human urine. Talanta 2016; 151:224-233. [PMID: 26946031 DOI: 10.1016/j.talanta.2016.01.037] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/14/2016] [Accepted: 01/17/2016] [Indexed: 11/18/2022]
Abstract
Phthalates and bisphenol A (BPA) have received special attention in recent years due to their frequent use in consumer products and potential for adverse effects on human health. BPA is being replaced with a number of alternatives, including bisphenol S, bisphenol B, bisphenol F and bisphenol AF. These bisphenol analogues have similar potential for adverse health effects, but studies on human exposure are limited. Accurate measurement of multiple contaminants is important for estimating exposure. This paper describes a sensitive and automated method for the simultaneous determination of 14 phthalate metabolites, BPA and four bisphenol analogues in urine using online solid phase extraction coupled with high-performance liquid chromatography/tandem mass spectrometry using a hybrid triple-quadrupole linear ion trap mass spectrometer (LC-QTRAP-MS/MS), requiring very little sample volume (50µL). Quantification was performed under selected reaction monitoring (SRM) mode with negative electrospray ionization. The use of SRM combined with an enhanced product ion scan within the same analysis was examined. Unequivocal identification was provided by the acquisition of three SRM transitions per compound and isotope dilution. The analytical performance of the method was evaluated in synthetic and human urine. Linearity of response over three orders of magnitude was demonstrated for all of the compounds (R(2)>0.99), with method detection limits of 0.01-0.5ng/mL and limits of reporting of 0.07-3.1ng/mL. Accuracy ranged from 93% to 113% and inter- and intra-day precision were <22%. Finally, the validated method has been successfully applied to a cohort of pregnant women to measure biomarker concentrations of phthalates and bisphenols, with median concentrations ranging from 0.3ng/mL (bisphenol S) to 18.5ng/mL (monoethyl phthalate).
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Affiliation(s)
- A L Heffernan
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
| | - K Thompson
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
| | - G Eaglesham
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
| | - S Vijayasarathy
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
| | - J F Mueller
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
| | - P D Sly
- Queensland Children's Medical Research Institute, and Children's Health and Environment Program, The University of Queensland, Centre for Children's Health Research, Level 7, 62 Graham St South, Brisbane, QLD, 4101, Australia.
| | - M J Gomez
- National Research Centre for Environmental Toxicology, The University of Queensland, 39 Kessels Rd, Coopers Plains, Brisbane, QLD 4108, Australia.
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Baharin SNA, Muhamad Sarih N, Mohamad S, Shahabuddin S, Sulaiman K, Ma'amor A. Removal of endocrine disruptor di-(2-ethylhexyl)phthalate by modified polythiophene-coated magnetic nanoparticles: characterization, adsorption isotherm, kinetic study, thermodynamics. RSC Adv 2016. [DOI: 10.1039/c6ra04172h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Superparamagnetic nanosorbent poly(phenyl(4-(6-thiophen-3-yl-hexyloxy)-benzylidene)-amine)/Fe3O4 nanoparticles (Fe3O4@P3TArH) were successfully synthesized via a simplistic method for the enhanced extraction of potent endocrine disruptor, di-(2-ethylhexyl)phthalate (DEHP).
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Affiliation(s)
- Siti Nor Atika Baharin
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Malaysia
- Faculty of Applied Science
| | | | - Sharifah Mohamad
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Malaysia
- University of Malaya Centre for Ionic Liquids (UMCiL)
| | - Syed Shahabuddin
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Malaysia
| | - Khaulah Sulaiman
- Department of Physics
- Faculty of Science
- University of Malaya
- Malaysia
| | - Azman Ma'amor
- Department of Chemistry
- Faculty of Science
- University of Malaya
- Malaysia
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Analytical methods for the determination of biomarkers of exposure to phthalates in human urine samples. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.06.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Morrison GC, Weschler CJ, Bekö G, Koch HM, Salthammer T, Schripp T, Toftum J, Clausen G. Role of clothing in both accelerating and impeding dermal absorption of airborne SVOCs. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2016; 26:113-8. [PMID: 26058800 DOI: 10.1038/jes.2015.42] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 05/09/2015] [Indexed: 05/27/2023]
Abstract
To assess the influence of clothing on dermal uptake of semi-volatile organic compounds (SVOCs), we measured uptake of selected airborne phthalates for an individual wearing clean clothes or air-exposed clothes and compared these results with dermal uptake for bare-skinned individuals under otherwise identical experimental conditions. Using a breathing hood to isolate dermal from inhalation uptake, we measured urinary metabolites of diethylphthalate (DEP) and di-n-butylphthalate (DnBP) from an individual exposed to known concentrations of these compounds for 6 h in an experimental chamber. The individual wore either clean (fresh) cotton clothes or cotton clothes that had been exposed to the same chamber air concentrations for 9 days. For a 6-h exposure, the net amounts of DEP and DnBP absorbed when wearing fresh clothes were, respectively, 0.017 and 0.007 μg/kg/(μg/m(3)); for exposed clothes the results were 0.178 and 0.261 μg/kg/(μg/m(3)), respectively (values normalized by air concentration and body mass). When compared against the average results for bare-skinned participants, clean clothes were protective, whereas exposed clothes increased dermal uptake for DEP and DnBP by factors of 3.3 and 6.5, respectively. Even for non-occupational environments, wearing clothing that has adsorbed/absorbed indoor air pollutants can increase dermal uptake of SVOCs by substantial amounts relative to bare skin.
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Affiliation(s)
- Glenn C Morrison
- Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri, USA
| | - Charles J Weschler
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, New Jersey, USA
- Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark
| | - Gabriel Bekö
- Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark
| | - Holger M Koch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, Bochum, Germany
| | - Tunga Salthammer
- Department of Material Analysis and Indoor Chemistry, Fraunhofer WKI, Bienroder Weg 54E, Braunschweig, Germany
| | - Tobias Schripp
- Department of Material Analysis and Indoor Chemistry, Fraunhofer WKI, Bienroder Weg 54E, Braunschweig, Germany
| | - Jørn Toftum
- Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark
| | - Geo Clausen
- Department of Civil Engineering, International Centre for Indoor Environment and Energy, Technical University of Denmark, Lyngby, Denmark
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Gómara B, Lebrón-Aguilar R, González M, Quintanilla-López J. Insight into the retention processes of phthalate metabolites on different liquid chromatography stationary phases for the development of improved separation methods. J Chromatogr A 2015; 1423:86-95. [DOI: 10.1016/j.chroma.2015.10.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/20/2015] [Accepted: 10/22/2015] [Indexed: 12/28/2022]
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Weschler CJ, Bekö G, Koch HM, Salthammer T, Schripp T, Toftum J, Clausen G. Transdermal Uptake of Diethyl Phthalate and Di(n-butyl) Phthalate Directly from Air: Experimental Verification. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:928-34. [PMID: 25850107 PMCID: PMC4590762 DOI: 10.1289/ehp.1409151] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Accepted: 04/03/2015] [Indexed: 05/20/2023]
Abstract
BACKGROUND Fundamental considerations indicate that, for certain phthalate esters, dermal absorption from air is an uptake pathway that is comparable to or greater than inhalation. Yet this pathway has not been experimentally evaluated and has been largely overlooked when assessing uptake of phthalate esters. OBJECTIVES This study investigated transdermal uptake, directly from air, of diethyl phthalate (DEP) and di(n-butyl) phthalate (DnBP) in humans. METHODS In a series of experiments, six human participants were exposed for 6 hr in a chamber containing deliberately elevated air concentrations of DEP and DnBP. The participants either wore a hood and breathed air with phthalate concentrations substantially below those in the chamber or did not wear a hood and breathed chamber air. All urinations were collected from initiation of exposure until 54 hr later. Metabolites of DEP and DnBP were measured in these samples and extrapolated to parent phthalate intakes, corrected for background and hood air exposures. RESULTS For DEP, the median dermal uptake directly from air was 4.0 μg/(μg/m(3) in air) compared with an inhalation intake of 3.8 μg/(μg/m(3) in air). For DnBP, the median dermal uptake from air was 3.1 μg/(μg/m(3) in air) compared with an inhalation intake of 3.9 μg/(μg/m(3) in air). CONCLUSIONS This study shows that dermal uptake directly from air can be a meaningful exposure pathway for DEP and DnBP. For other semivolatile organic compounds (SVOCs) whose molecular weight and lipid/air partition coefficient are in the appropriate range, direct absorption from air is also anticipated to be significant.
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Affiliation(s)
- Charles J Weschler
- Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, New Jersey, USA
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Eckert E, Müller J, Göen T. Simultaneous determination of polyvinylchloride plasticizers di(2-ethylhexyl) phthalate and tri(2-ethylhexyl) trimellitate and its degradation products in blood by liquid chromatography-tandem mass spectrometry. J Chromatogr A 2015; 1410:173-80. [DOI: 10.1016/j.chroma.2015.07.083] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 07/02/2015] [Accepted: 07/22/2015] [Indexed: 10/23/2022]
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Sabaredzovic A, Sakhi AK, Brantsæter AL, Thomsen C. Determination of 12 urinary phthalate metabolites in Norwegian pregnant women by core-shell high performance liquid chromatography with on-line solid-phase extraction, column switching and tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1002:343-52. [PMID: 26355271 DOI: 10.1016/j.jchromb.2015.08.040] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 08/25/2015] [Accepted: 08/27/2015] [Indexed: 11/16/2022]
Abstract
Phthalates (dialkyl or alkyl phenyl esters of phthalic acid, benzene-1.2-dicarboxylic acid) are a group of industrial chemicals that have been used for more than 50 years. Phthalates are ubiquitous and can potentially have adverse effects on humans. The present study presents an accurate, sensitive and automated analytical method for measuring 12 phthalate metabolites (free and conjugated) in human urine using on-line solid phase extraction coupled to high performance liquid chromatography - electrospray ionization - tandem mass spectrometry. A small volume of urine sample (300μL) is required. Glucoronidated phthalate metabolites are deconjugated by incubation with glucoronidase enzyme (Escherihia coli-K 12) and the reaction is stopped by adding formic acid. This is the only sample preparation needed prior to injection into the column switching system. Thus, the method involves minimal sample handling and minimizes possible contaminations from the surroundings. The method was validated by spiking synthetic urine at 5-8 levels in the range of 0.1-500ng phthalate metabolites/mL synthetic urine. The method is sensitive with limits of detection in the low nanogram range, and rapid with a total run time about 25min. The accuracy was between 90 and 120 % and the intermediate precision was given as relative standard deviation was below 20% for most of the compounds. The high sensitivity, high throughput and minimal manual handling make the method suitable for large-scale biomonitoring studies. The present method was applied for the determination of phthalate metabolites in urine samples from 116 pregnant women, a subproject within the Norwegian Mother and Child Cohort Study. Concentrations of all the twelve phthalate metabolites was >LOQ in 100% of the samples analysed. Mean urinary concentrations for different phthalate metabolites ranged from 1 to 100ng/mL, the highest concentrations were observed for di-2-ethylhexyl phthalate (DEHP) metabolites and lowest for di-iso-nonyl phthalate (DiNP) metabolites. The urinary concentrations for most of the phthalate metabolites in the present study were found to be in the same range as found in other studies of pregnant women.
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Affiliation(s)
- Azemira Sabaredzovic
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen, 0403 Oslo, Norway.
| | - Amrit Kaur Sakhi
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen, 0403 Oslo, Norway
| | - Anne Lise Brantsæter
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen, 0403 Oslo, Norway
| | - Cathrine Thomsen
- Division of Environmental Medicine, Norwegian Institute of Public Health, P.O. Box 4404, Nydalen, 0403 Oslo, Norway
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