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Chen IC, Bertke SJ, Estill CF. Compare the marginal effects for environmental exposure and biomonitoring data with repeated measurements and values below the limit of detection. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2024:10.1038/s41370-024-00640-7. [PMID: 38253592 DOI: 10.1038/s41370-024-00640-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024]
Abstract
BACKGROUND Environmental exposure and biomonitoring data with repeated measurements from environmental and occupational studies are commonly right-skewed and in the presence of limits of detection (LOD). However, existing model has not been discussed for small-sample properties and highly skewed data with non-detects and repeated measurements. OBJECTIVE Marginal modeling provides an alternative to analyzing longitudinal and cluster data, in which the parameter interpretations are with respect to marginal or population-averaged means. METHODS We outlined the theories of three marginal models, i.e., generalized estimating equations (GEE), quadratic inference functions (QIF), and generalized method of moments (GMM). With these approaches, we proposed to incorporate the fill-in methods, including single and multiple value imputation techniques, such that any measurements less than the limit of detection are assigned values. RESULTS We demonstrated that the GEE method works well in terms of estimating the regression parameters in small sample sizes, while the QIF and GMM outperform in large-sample settings, as parameter estimates are consistent and have relatively smaller mean squared error. No specific fill-in method can be deemed superior as each has its own merits. IMPACT Marginal modeling is firstly employed to analyze repeated measures data with non-detects, in which only the mean structure needs to be correctly provided to obtain consistent parameter estimates. After replacing non-detects through substitution methods and utilizing small-sample bias corrections, in a simulation study we found that the estimating approaches used in the marginal models have corresponding advantages under a wide range of sample sizes. We also applied the models to longitudinal and cluster working examples.
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Affiliation(s)
- I-Chen Chen
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, OH, USA.
| | - Stephen J Bertke
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, OH, USA
| | - Cheryl Fairfield Estill
- Division of Field Studies and Engineering, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, OH, USA
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Stanfield Z, Setzer RW, Hull V, Sayre RR, Isaacs KK, Wambaugh JF. Characterizing Chemical Exposure Trends from NHANES Urinary Biomonitoring Data. ENVIRONMENTAL HEALTH PERSPECTIVES 2024; 132:17009. [PMID: 38285237 PMCID: PMC10824265 DOI: 10.1289/ehp12188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/19/2023] [Accepted: 12/12/2023] [Indexed: 01/30/2024]
Abstract
BACKGROUND Xenobiotic metabolites are widely present in human urine and can indicate recent exposure to environmental chemicals. Proper inference of which chemicals contribute to these metabolites can inform human exposure and risk. Furthermore, longitudinal biomonitoring studies provide insight into how chemical exposures change over time. OBJECTIVES We constructed an exposure landscape for as many human-exposure relevant chemicals over as large a time span as possible to characterize exposure trends across demographic groups and chemical types. METHODS We analyzed urine data of nine 2-y cohorts (1999-2016) from the National Health and Nutrition Examination Survey (NHANES). Chemical daily intake rates (in milligrams per kilogram bodyweight per day) were inferred, using the R package bayesmarker, from metabolite concentrations in each cohort individually to identify exposure trends. Trends for metabolites and parents were clustered to find chemicals with similar exposure patterns. Exposure variation by age, gender, and body mass index were also assessed. RESULTS Intake rates for 179 parent chemicals were inferred from 151 metabolites (96 measured in five or more cohorts). Seventeen metabolites and 44 parent chemicals exhibited fold-changes ≥ 10 between any two cohorts (deltamethrin, di-n -octyl phthalate, and di-isononyl phthalate had the greatest exposure increases). Di-2-ethylhexyl phthalate intake began decreasing in 2007, whereas both di-isobutyl and di-isononyl phthalate began increasing shortly before. Intake for four parabens was markedly higher in females, especially reproductive-age females, compared with males and children. Cadmium and arsenobetaine exhibited higher exposure for individuals > 65 years of age and lower for individuals < 20 years of age. DISCUSSION With appropriate analysis, NHANES indicates trends in chemical exposures over the past two decades. Decreases in exposure are observable as the result of regulatory action, with some being accompanied by increases in replacement chemicals. Age- and gender-specific variations in exposure were observed for multiple chemicals. Continued estimation of demographic-specific exposures is needed to both monitor and identify potential vulnerable populations. https://doi.org/10.1289/EHP12188.
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Affiliation(s)
- Zachary Stanfield
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - R. Woodrow Setzer
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - Victoria Hull
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
- Oak Ridge Associated Universities, Oak Ridge, Tennessee, USA
| | - Risa R. Sayre
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
- Oak Ridge Associated Universities, Oak Ridge, Tennessee, USA
| | - Kristin K. Isaacs
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - John F. Wambaugh
- Center for Computational Toxicology and Exposure, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, North Carolina, USA
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Dam (Canis familiaris) Welfare throughout the Peri-Parturient Period in Commercial Breeding Kennels. Animals (Basel) 2022; 12:ani12202820. [PMID: 36290206 PMCID: PMC9597717 DOI: 10.3390/ani12202820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Welfare problems experienced during gestation and lactation may negatively affect dams and their puppies. However, the welfare states of dams in commercial breeding (CB) kennels during this period have not been well examined. Therefore, we examined a range of behavioral, physical, and physiological metrics throughout the period around parturition to identify if changes indicative of impaired welfare were present. We tested 74 dams from eight CB kennels at 6 and 1 week prepartum, and 4 and 8 weeks postpartum. At each time point we measured their responses to a stranger approaching, their physical health, and indicators of their stress response, immune function, and parasite burden. Findings did not reveal major changes in dam welfare. Most changes observed were likely because of natural biological changes resulting from pregnancy, lactation, and weaning. However, as some changes in metrics deviated from what was expected and there were changes in environmental and management factors during this time, future research should identify how they affect dam welfare. Abstract Poor dam welfare throughout the peri-parturient period can also negatively affect that of their offspring. This study aimed to identify changes in physical, physiological, and behavioral metrics indicative of dam welfare throughout the peri-parturient period. Dams (n = 74) from eight U.S. Midwest commercial breeding (CB) kennels were tested at 6 and 1 week prepartum, and 4 and 8 weeks postpartum. At each time point dams underwent a stranger approach test, physical health assessment, hair collection for hair cortisol concentration (HCC) and fecal collection for fecal glucocorticoid metabolites (FGM), fecal secretory immunoglobulin A (sIgA) and parasite detection. Linear mixed-effects models indicated dams exhibited more affiliative behaviors towards the stranger at 4 weeks postpartum than 6 weeks prepartum (p = 0.03), increased HCC from 4-weeks to 8 weeks postpartum (p = 0.02), and increased FGM from 1 week prepartum to 8 weeks postpartum (p = 0.04). At each respective time point, the percentage of dams with intestinal parasites was 11%, 4%, 23%, and 15%. Most changes are likely due to increased energy requirements and hormonal variations. However, deviations from expected changes may have resulted from changes in environment and/ or management, which should be explored in future studies.
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Cosemans C, Van Larebeke N, Janssen BG, Martens DS, Baeyens W, Bruckers L, Den Hond E, Coertjens D, Nelen V, Schoeters G, Hoppe HW, Wolfs E, Smeets K, Nawrot TS, Plusquin M. Glyphosate and AMPA exposure in relation to markers of biological aging in an adult population-based study. Int J Hyg Environ Health 2022; 240:113895. [PMID: 34883335 DOI: 10.1016/j.ijheh.2021.113895] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND/AIM Glyphosate, a broad-spectrum herbicide, and its main metabolite aminomethylphosphonic acid (AMPA) are persistent in the environment. Studies showed associations between glyphosate or AMPA exposure and several adverse cellular processes, including metabolic alterations and oxidative stress. OBJECTIVE To determine the association between glyphosate and AMPA exposure and biomarkers of biological aging. METHODS We examined glyphosate and AMPA exposure, mtDNA content and leukocyte telomere length in 181 adults, included in the third cycle of the Flemish Environment and Health Study (FLEHSIII). DNA was isolated from leukocytes and the relative mtDNA content and telomere length were determined using qPCR. Urinary glyphosate and AMPA concentrations were measured by Gas Chromatography-Tandem Mass Spectrometry (GC-MS-MS). We used multiple linear regression models to associate mtDNA content and leukocyte telomere length with glyphosate or AMPA exposure while adjusting for confounding variables. RESULTS A doubling in urinary AMPA concentration was associated with 5.19% (95% CI: 0.49 to 10.11; p = 0.03) longer leukocyte telomere length, while no association was observed with urinary glyphosate concentration. No association between mtDNA content and urinary glyphosate nor AMPA levels was observed. CONCLUSIONS This study showed that AMPA exposure may be associated with telomere biology in adults.
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Affiliation(s)
- Charlotte Cosemans
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Nicolas Van Larebeke
- Department of Radiotherapy and Experimental Cancerology, Ghent University, Ghent, Belgium; Department of Analytical, Environmental and Geo-Chemistry, Vrije Universiteit Brussel, Brussels, Belgium
| | - Bram G Janssen
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Willy Baeyens
- Department of Analytical and Environmental Chemistry, Vrije Universiteit Brussel, Brussels, Belgium
| | - Liesbeth Bruckers
- Interuniversity Institute for Biostatistics and Statistical Bioinformatics, Hasselt University, Hasselt, Belgium
| | | | - Dries Coertjens
- Faculty of Social Sciences and IMDO, University of Antwerp, Antwerp, Belgium
| | - Vera Nelen
- Faculty of Social Sciences and IMDO, University of Antwerp, Antwerp, Belgium
| | - Greet Schoeters
- Environmental Risk and Health, Flemish Institute for Technological Research (VITO), Mol, Belgium
| | | | - Esther Wolfs
- Biomedical Research Institute, Faculty of Medicine, Hasselt University, Belgium
| | - Karen Smeets
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium; School of Public Health, Occupational & Environmental Medicine, Leuven University, Leuven, Belgium
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium.
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Escriba-Montagut X, Basagaña X, Vrijheid M, Gonzalez JR. Software Application Profile: exposomeShiny—a toolbox for exposome data analysis. Int J Epidemiol 2021. [PMCID: PMC8855999 DOI: 10.1093/ije/dyab220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Motivation Studying the role of the exposome in human health and its impact on different omic layers requires advanced statistical methods. Many of these methods are implemented in different R and Bioconductor packages, but their use may require strong expertise in R, in writing pipelines and in using new R classes which may not be familiar to non-advanced users. ExposomeShiny provides a bridge between researchers and most of the state-of-the-art exposome analysis methodologies, without the need of advanced programming skills. Implementation ExposomeShiny is a standalone web application implemented in R. It is available as source files and can be installed in any server or computer avoiding problems with data confidentiality. It is executed in RStudio which opens a browser window with the web application. General features The presented implementation allows the conduct of: (i) data pre-processing: normalization and missing imputation (including limit of detection); (ii) descriptive analysis; (iii) exposome principal component analysis (PCA) and hierarchical clustering; (iv) exposome-wide association studies (ExWAS) and variable selection ExWAS; (v) omic data integration by single association and multi-omic analyses; and (vi) post-exposome data analyses to gain biological insight for the exposures, genes or using the Comparative Toxicogenomics Database (CTD) and pathway analysis. Availability The exposomeShiny source code is freely available on Github at [https://github.com/isglobal-brge/exposomeShiny], Git tag v1.4. The software is also available as a Docker image [https://hub.docker.com/r/brgelab/exposome-shiny], tag v1.4. A user guide with information about the analysis methodologies as well as information on how to use exposomeShiny is freely hosted at [https://isglobal-brge.github.io/exposome_bookdown/].
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Affiliation(s)
| | - Xavier Basagaña
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Martine Vrijheid
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
- Department of Mathematics, Universitat Autònoma de Barcelona (UAB), Bellaterra (Barcelona), Spain
| | - Juan R Gonzalez
- Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
- Centro de Investigación Biomédica en Red en Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
- Department of Mathematics, Universitat Autònoma de Barcelona (UAB), Bellaterra (Barcelona), Spain
- Corresponding author. Barcelona Biomedical Research Park (PRBB), Doctor Aiguader, 88. 08003 Barcelona, Spain. E-mail:
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Marques M, Maitre A, Choisnard L, Demeilliers C, Persoons R. Simultaneous analysis of PAH urinary mono- and dihydroxylated metabolites by GC-MS-MS following SPE and two-stage derivatization. Anal Bioanal Chem 2021; 413:6823-6835. [PMID: 34494123 DOI: 10.1007/s00216-021-03638-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 08/19/2021] [Accepted: 08/30/2021] [Indexed: 10/20/2022]
Abstract
A new gas chromatography-tandem mass spectrometry method for the determination of mono- and dihydroxylated polycyclic aromatic hydrocarbon metabolites (OH-PAHs and diol-PAHs) in urine was developed and validated. Various sample preparation procedures were compared, namely liquid-liquid extraction (LLE), dispersive solid-phase extraction (dSPE), and SPE, alone or combined. A novel two-stage derivatization approach using 2 silylation reagents was developed, and an experimental procedure design was used to optimize the programmed temperature vaporization-solvent vent injection (PTV-SV) GC parameters. The method focused on 11 target compounds resulting from four- to five-ring suspected carcinogenic PAHs. SPE was identified as an acceptable and more convenient extraction method for all tested metabolites, with extraction rates ranging from 63 to 86% and relative standard deviations lower than 20%. The two-stage derivatization approach successfully allowed first the derivatization of OH-PAHs by MTBSTFA (N-tert-butyldimethylsilyl-N-methyltrifluoroacetamide) and then diol-PAHs by BSTFA (N,O-bis(trimethylsilyl)trifluoroacetamide) in a single run. The limits of quantification were in the range of 0.01-0.02 μg l-1 for OH-PAHs and 0.02-0.2 μg l-1 for diol-PAHs. The intra- and interday precisions were lower than 10%. The method was applied to determine PAH metabolites in urine collected at the beginning and at the end of the working week from 6 workers involved in aluminum production. The mean diol-PAH levels at the end of the week were 10 to 20 times higher (0.86-2.34 μg g-1 creatinine) than those of OH-PAHs (0.03-0.30 μg g-1). These results confirmed the usefulness of this new analytical technique for detecting and characterizing metabolic patterns of PAHs in urine and assessing carcinogenic occupational exposures.
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Affiliation(s)
- Marie Marques
- Université Grenoble Alpes, CNRS Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France
| | - Anne Maitre
- Université Grenoble Alpes, CNRS Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France
| | - Luc Choisnard
- Département de Pharmachimie Moléculaire, UMR CNRS 5063, Université Grenoble Alpes, 38000, Grenoble, France
| | - Christine Demeilliers
- Université Grenoble Alpes, CNRS Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France
| | - Renaud Persoons
- Université Grenoble Alpes, CNRS Grenoble INP, CHU Grenoble Alpes, TIMC, 38000, Grenoble, France.
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Rodzaj W, Wileńska M, Klimowska A, Dziewirska E, Jurewicz J, Walczak-Jędrzejowska R, Słowikowska-Hilczer J, Hanke W, Wielgomas B. Concentrations of urinary biomarkers and predictors of exposure to pyrethroid insecticides in young, Polish, urban-dwelling men. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145666. [PMID: 33596511 DOI: 10.1016/j.scitotenv.2021.145666] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/09/2021] [Accepted: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Pyrethroid insecticides are a class of pesticides with multiple agricultural and residential applications. However, widespread use of these chemicals may pose a threat to human health. Biomarkers of pyrethroid exposure are frequently detected in populations around the world, but some groups may be underrepresented. Moreover, there is an ongoing debate on factors contributing to pyrethroid burden in humans. To address these problems, we measured urinary biomarkers of pyrethroid exposure in urine samples from 306 young men living in urban area of Łódź, Poland, and gathered questionnaire data to identify predictors of exposure. Limit of detection (LOD) of gas chromatography-mass spectrometry (GC-MS) method was 0.1 ng/mL for all quantified pyrethroid metabolites, namely cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid (cis-DCCA), trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylic acid (trans-DCCA), cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane carboxylic acid (cis-DBCA), and 3-phenoxybenzoic acid (3-PBA). Detection rate ranged from 32% (cis-DBCA) to 76% (trans-DCCA). Concentrations of urinary biomarkers in studied sample were in lower range of these observed in similar studies, with unadjusted geometric means (GMs) of most prevalent biomarkers, trans-DCCA and 3-PBA, equal to 0.268 and 0.228 ng/mL, respectively. As for questionnaire data, the statistical analysis revealed that non-dietary factors, especially dog ownership and pesticide use on household pets, contribute significantly to urinary trans-DCCA and 3-PBA concentrations (p ≤ 0.009). Moreover, a few dietary sources of exposure were identified, such as seeds and nuts consumption for 3-PBA (p < 0.001) and vegetable juice intake for trans-DCCA (p = 0.015). Multivariate analyses further highlighted the importance of non-dietary factors in pyrethroid exposure. Compared to other works, our results confirm widespread exposure to pyrethroids observed in other studies and stress the role of residential pyrethroid use in pyrethroid burden in humans.
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Affiliation(s)
- Wojciech Rodzaj
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, 107 Hallera Street, 80-416 Gdańsk, Poland
| | - Malwina Wileńska
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, 107 Hallera Street, 80-416 Gdańsk, Poland
| | - Anna Klimowska
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, 107 Hallera Street, 80-416 Gdańsk, Poland
| | - Emila Dziewirska
- Departament of Chemical Safety, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Łódź, Poland
| | - Joanna Jurewicz
- Departament of Chemical Safety, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Łódź, Poland
| | - Renata Walczak-Jędrzejowska
- Department of Andrology and Reproductive Endocrinology, Medical University of Łódź, 251 Pomorska Street, 92-213 Łódź, Poland
| | - Jolanta Słowikowska-Hilczer
- Department of Andrology and Reproductive Endocrinology, Medical University of Łódź, 251 Pomorska Street, 92-213 Łódź, Poland
| | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Łódź, Poland
| | - Bartosz Wielgomas
- Department of Toxicology, Faculty of Pharmacy, Medical University of Gdańsk, 107 Hallera Street, 80-416 Gdańsk, Poland.
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Dolinski AC, Jankowski MD, Fair JM, Owen JC. The association between SAα2,3Gal occurrence frequency and avian influenza viral load in mallards (Anas platyrhynchos) and blue-winged teals (Spatula discors). BMC Vet Res 2020; 16:430. [PMID: 33167978 PMCID: PMC7653716 DOI: 10.1186/s12917-020-02642-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 10/26/2020] [Indexed: 12/05/2022] Open
Abstract
Background Individual heterogeneity in pathogen load can affect disease transmission dynamics; therefore, identifying intrinsic factors responsible for variation in pathogen load is necessary for determining which individuals are prone to be most infectious. Because low pathogenic avian influenza viruses (LPAIV) preferentially bind to alpha-2,3 sialic acid receptors (SAα2,3Gal) in the intestines and bursa of Fabricius in wild ducks (Anas and Spatula spp.), we investigated juvenile mallards (Anas platyrhyncos) and blue-winged teals (Anas discors) orally inoculated with A/northern pintail/California/44221–761/2006 (H5N9) and the virus titer relationship to occurrence frequency of SAα2,3Gal in the intestines and bursa. To test the natural variation of free-ranging duck populations, birds were hatched and raised in captivity from eggs collected from nests of free-ranging birds in North Dakota, USA. Data generated from qPCR were used to quantify virus titers in cloacal swabs, ileum tissue, and bursa of Fabricius tissue, and lectin histochemistry was used to quantify the occurrence frequency of SAα2,3Gal. Linear mixed models were used to analyze infection status, species, and sex-based differences. Multiple linear regression was used to analyze the relationship between virus titer and SAα2,3Gal occurrence frequency. Results In mallards, we found high individual variation in virus titers significantly related to high variation of SAα2,3Gal in the ileum. In contrast to mallards, individual variation in teals was minimal and significant relationships between virus titers and SAα2,3Gal were not determined. Collectively, teals had both higher virus titers and a higher occurrence frequency of SAα2,3Gal compared to mallards, which may indicate a positive association between viral load and SAα2,3Gal. Statistically significant differences were observed between infected and control birds indicating that LPAIV infection may influence the occurrence frequency of SAα2,3Gal, or vice versa, but only in specific tissues. Conclusions The results of this study provide quantitative evidence that SAα2,3Gal abundance is related to LPAIV titers; thus, SAα2,3Gal should be considered a potential intrinsic factor influencing variation in LPAIV load. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-020-02642-7.
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Affiliation(s)
- Amanda C Dolinski
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI, USA.
| | - Mark D Jankowski
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI, USA.,U.S. Environmental Protection Agency, Seattle, WA, USA
| | - Jeanne M Fair
- Los Alamos National Laboratory, Biosecurity & Public Health, Los Alamos, NM, USA
| | - Jennifer C Owen
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI, USA.,Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI, USA
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Roy CL, Jankowski M, Ponder J, Chen D. Sublethal and Lethal Methods to Detect Recent Imidacloprid Exposure in Birds with Application to Field Studies. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:1355-1366. [PMID: 32274821 PMCID: PMC8164728 DOI: 10.1002/etc.4721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 09/23/2019] [Accepted: 03/30/2020] [Indexed: 06/10/2023]
Abstract
We used domestic chickens (Gallus gallus domesticus) as a model for granivorous birds to identify methods to detect recent imidacloprid exposure in wild birds. We conducted dosing experiments of 1, 5, 10, and 20% of a reported median lethal dose for domestic chickens using repeated daily exposures over 7 d, at dosages equating to 1.04, 5.2, 10.4, and 20.8 mg/kg/d. We examined the parent compound and metabolites in serial collections of feces and blood during exposures and for 15 d after exposures. We also collected liver, kidney, brain, muscle, and spleen at the experiment end. Mean concentrations of parent compound at 15 d postexposure were highest in the feces and brain, followed by the liver, muscle, spleen, and kidney; but mean concentrations of metabolites 5-OH-imidacloprid and imidacloprid-olefin were highest in feces; then liver, spleen, muscle, and kidney; and then brain. Imidacloprid was rapidly cleared from blood, with only one individual in any dose group having detectable concentrations after 48 h. In contrast, fecal pellets had the highest frequency of imidacloprid detection after 15 d. Concentrations of metabolites were higher than those of the parent compound at all sampling times examined but provided no information about time since exposure. Feces may provide a reliable nonlethal method for detection of recent imidacloprid exposure in wild birds. Additional work is needed to disentangle exposure dose concentration and time since exposure in field-collected samples. Environ Toxicol Chem 2020;39:1355-1366. © 2020 SETAC.
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Affiliation(s)
- Charlotte L. Roy
- Minnesota Department of Natural Resources, Grand Rapids, Minnesota, USA
| | - Mark Jankowski
- United States Environmental Protection Agency, Seattle, Washington, USA
| | - Julia Ponder
- The Raptor Center, The University of Minnesota College of Veterinary Medicine, St. Paul, Minnesota, USA
| | - Da Chen
- Southern Illinois University, Carbondale, Illinois, USA
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Wise CF, Hammel SC, Herkert N, Ma J, Motsinger-Reif A, Stapleton HM, Breen M. Comparative Exposure Assessment Using Silicone Passive Samplers Indicates That Domestic Dogs Are Sentinels To Support Human Health Research. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:7409-7419. [PMID: 32401030 PMCID: PMC7655112 DOI: 10.1021/acs.est.9b06605] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Silicone wristbands are promising passive samplers to support epidemiological studies in characterizing exposure to organic contaminants; however, investigating associated health risks remains challenging because of the latency period for many chronic diseases that take years to manifest. Dogs provide valuable insights as sentinels for exposure-related human disease because they share similar exposures in the home, have shorter life spans, share many clinical/biological features, and have closely related genomes. Here, we evaluated exposures among pet dogs and their owners using silicone dog tags and wristbands to determine if contaminant levels were correlated with validated exposure biomarkers. Significant correlations between measures on dog tags and wristbands were observed (rs = 0.38-0.90; p < 0.05). Correlations with their respective urinary biomarkers were stronger in dog tags compared to that in human wristbands (rs = 0.50-0.71; p < 0.01) for several organophosphate esters. This supports the value of using silicone bands with dogs to investigate health impacts on humans from shared exposures.
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Affiliation(s)
- Catherine F. Wise
- Department of Biological Sciences, Environmental and Molecular Toxicology Program, North Carolina State University, 850 Main Campus Drive, Raleigh, North Carolina 27606, United States
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina 27607, United States
| | - Stephanie C. Hammel
- Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Nicholas Herkert
- Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
| | - Jun Ma
- Department of Statistics, North Carolina State University, Raleigh, North Carolina 27607, United States
- Bioinformatics Research Center, North Carolina State University, Raleigh, North Carolina 27607, United States
| | - Alison Motsinger-Reif
- Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Durham, North Carolina 27709, United States
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
- Duke Cancer Institute, Durham, North Carolina, United States
| | - Matthew Breen
- Department of Biological Sciences, Environmental and Molecular Toxicology Program, North Carolina State University, 850 Main Campus Drive, Raleigh, North Carolina 27606, United States
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, North Carolina 27607, United States
- Duke Cancer Institute, Durham, North Carolina, United States
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina 27607, United States
- Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina 27607, United States
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11
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Lee GO, Comina G, Hernandez-Cordova G, Naik N, Gayoso O, Ticona E, Coronel J, Evans CA, Zimic M, Paz-Soldan VA, Gilman RH, Oberhelman R. Cough dynamics in adults receiving tuberculosis treatment. PLoS One 2020; 15:e0231167. [PMID: 32511248 PMCID: PMC7279573 DOI: 10.1371/journal.pone.0231167] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 03/17/2020] [Indexed: 11/19/2022] Open
Abstract
Cough is a characteristic symptom of tuberculosis, is the main cause of transmission, and is used to assess treatment response. We aimed to identify the best measure of cough severity and characterize changes during initial tuberculosis therapy. We conducted a prospective cohort of recently diagnosed ambulatory adult patients with pulmonary tuberculosis in two tertiary hospitals in Lima, Peru. Pre-treatment and five times during the first two months of treatment, a vibrometer was used to capture 4-hour recordings of involuntary cough. A total of 358 recordings from 69 participants were analyzed using a computer algorithm. Total time spent coughing (seconds per hour) was a better predictor of microbiologic indicators of disease severity and treatment response than the frequency of cough episodes or cough power. Patients with prior tuberculosis tended to cough more than patients without prior tuberculosis, and patients with tuberculosis and diabetes coughed more than patients without diabetes co-morbidity. Cough characteristics were similar regardless of HIV co-infection and for drug-susceptible versus drug-resistant tuberculosis. Tuberculosis treatment response may be meaningfully assessed by objectively monitoring the time spent coughing. This measure demonstrated that cough was increased in patients with TB recurrence or co-morbid diabetes, but not because of drug resistance or HIV co-infection.
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Affiliation(s)
- Gwenyth O. Lee
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana, United States of America
- Department of Epidemiology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Germán Comina
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana, United States of America
| | - Gustavo Hernandez-Cordova
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana, United States of America
| | - Nehal Naik
- School of Medicine, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Oscar Gayoso
- Pulmonology Department, Hospital Nacional Cayetano Heredia, Lima, Peru
| | - Eduardo Ticona
- Facultad de Medicina, Universidad Nacional Mayor de San Marcos, San Marcos, Peru
- Servicio de Enfermedades Infecciosas y Tropicales, Hospital Nacional Dos de Mayo Lima, Mayo, Lima, Perú
| | - Jorge Coronel
- Laboratorio de Investigación en Enfermedades Infecciosas, Laboratorio de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Carlton A. Evans
- Asociación Benéfica PRISMA, Lima, Perú
- Laboratory of Research and Development, Innovation For Health And Development (IFHAD), Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Infectious Disease, Imperial College London, London, United Kingdom
| | - Mirko Zimic
- Laboratorio de Investigación en Enfermedades Infecciosas, Laboratorio de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
- Laboratorio de Bioinformática y Biología Molecular, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Valerie A. Paz-Soldan
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana, United States of America
- Asociación Benéfica PRISMA, Lima, Perú
| | - Robert H. Gilman
- Laboratorio de Investigación en Enfermedades Infecciosas, Laboratorio de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, Lima, Peru
- Asociación Benéfica PRISMA, Lima, Perú
- Department of International Health, Program in Global Disease Epidemiology and Control, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Richard Oberhelman
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana, United States of America
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12
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Gaballah S, Swank A, Sobus JR, Howey XM, Schmid J, Catron T, McCord J, Hines E, Strynar M, Tal T. Evaluation of Developmental Toxicity, Developmental Neurotoxicity, and Tissue Dose in Zebrafish Exposed to GenX and Other PFAS. ENVIRONMENTAL HEALTH PERSPECTIVES 2020; 128:47005. [PMID: 32271623 PMCID: PMC7228129 DOI: 10.1289/ehp5843] [Citation(s) in RCA: 194] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
BACKGROUND Per- and polyfluoroalkyl substances (PFAS) are a diverse class of industrial chemicals with widespread environmental occurrence. Exposure to long-chain PFAS is associated with developmental toxicity, prompting their replacement with short-chain and fluoroether compounds. There is growing public concern over the safety of replacement PFAS. OBJECTIVE We aimed to group PFAS based on shared toxicity phenotypes. METHODS Zebrafish were developmentally exposed to 4,8-dioxa-3H-perfluorononanoate (ADONA), perfluoro-2-propoxypropanoic acid (GenX Free Acid), perfluoro-3,6-dioxa-4-methyl-7-octene-1-sulfonic acid (PFESA1), perfluorohexanesulfonic acid (PFHxS), perfluorohexanoic acid (PFHxA), perfluoro-n-octanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), or 0.4% dimethyl sulfoxide (DMSO) daily from 0-5 d post fertilization (dpf). At 6 dpf, developmental toxicity and developmental neurotoxicity assays were performed, and targeted analytical chemistry was used to measure media and tissue doses. To test whether aliphatic sulfonic acid PFAS cause the same toxicity phenotypes, perfluorobutanesulfonic acid (PFBS; 4-carbon), perfluoropentanesulfonic acid (PFPeS; 5-carbon), PFHxS (6-carbon), perfluoroheptanesulfonic acid (PFHpS; 7-carbon), and PFOS (8-carbon) were evaluated. RESULTS PFHxS or PFOS exposure caused failed swim bladder inflation, abnormal ventroflexion of the tail, and hyperactivity at nonteratogenic concentrations. Exposure to PFHxA resulted in a unique hyperactivity signature. ADONA, PFESA1, or PFOA exposure resulted in detectable levels of parent compound in larval tissue but yielded negative toxicity results. GenX was unstable in DMSO, but stable and negative for toxicity when diluted in deionized water. Exposure to PFPeS, PFHxS, PFHpS, or PFOS resulted in a shared toxicity phenotype characterized by body axis and swim bladder defects and hyperactivity. CONCLUSIONS All emerging fluoroether PFAS tested were negative for evaluated outcomes. Two unique toxicity signatures were identified arising from structurally dissimilar PFAS. Among sulfonic acid aliphatic PFAS, chemical potencies were correlated with increasing carbon chain length for developmental neurotoxicity, but not developmental toxicity. This study identified relationships between chemical structures and in vivo phenotypes that may arise from shared mechanisms of PFAS toxicity. These data suggest that developmental neurotoxicity is an important end point to consider for this class of widely occurring environmental chemicals. https://doi.org/10.1289/EHP5843.
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Affiliation(s)
- Shaza Gaballah
- Oak Ridge Institute for Science and Education, Integrated Systems Toxicology Division (ISTD), National Health and Environmental Effects Research Laboratory (NHEERL), Office of Research and Development (ORD), U.S. Environmental Protection Agency (EPA), Research Triangle Park, North Carolina, USA
| | - Adam Swank
- Research Cores Unit, NHEERL, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Jon R. Sobus
- Exposure Methods and Measurement Division, National Exposure Research Laboratory, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Xia Meng Howey
- Oak Ridge Institute for Science and Education, Integrated Systems Toxicology Division (ISTD), National Health and Environmental Effects Research Laboratory (NHEERL), Office of Research and Development (ORD), U.S. Environmental Protection Agency (EPA), Research Triangle Park, North Carolina, USA
| | - Judith Schmid
- Toxicology Assessment Division, NHEERL, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Tara Catron
- Oak Ridge Institute for Science and Education, Integrated Systems Toxicology Division (ISTD), National Health and Environmental Effects Research Laboratory (NHEERL), Office of Research and Development (ORD), U.S. Environmental Protection Agency (EPA), Research Triangle Park, North Carolina, USA
| | - James McCord
- Exposure Methods and Measurement Division, National Exposure Research Laboratory, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Erin Hines
- National Center for Environmental Assessment, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Mark Strynar
- Exposure Methods and Measurement Division, National Exposure Research Laboratory, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
| | - Tamara Tal
- ISTD, NHEERL, ORD, U.S. EPA, Research Triangle Park, North Carolina, USA
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13
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Fent KW, Toennis C, Sammons D, Robertson S, Bertke S, Calafat AM, Pleil JD, Wallace MAG, Kerber S, Smith D, Horn GP. Firefighters' absorption of PAHs and VOCs during controlled residential fires by job assignment and fire attack tactic. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2020; 30:338-349. [PMID: 31175324 PMCID: PMC7323473 DOI: 10.1038/s41370-019-0145-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 04/11/2019] [Accepted: 04/17/2019] [Indexed: 05/07/2023]
Abstract
To better understand the absorption of combustion byproducts during firefighting, we performed biological monitoring (breath and urine) on firefighters who responded to controlled residential fires and examined the results by job assignment and fire attack tactic. Urine was analyzed for metabolites of polycyclic aromatic hydrocarbons (PAHs) and breath was analyzed for volatile organic compounds (VOCs) including benzene. Median concentrations of PAH metabolites in urine increased from pre-firefighting to 3-h post firefighting for all job assignments. This change was greatest for firefighters assigned to attack and search with 2.3, 5.6, 3.9, and 1.4-fold median increases in pyrene, phenanthrene, naphthalene, and fluorene metabolites. Median exhaled breath concentrations of benzene increased 2-fold for attack and search firefighters (p < 0.01) and 1.4-fold for outside vent firefighters (p = 0.02). Compared to interior attack, transitional attack resulted in 50% less uptake of pyrene (p = 0.09), 36% less uptake phenanthrene (p = 0.052), and 20% less uptake of fluorene (p < 0.01). Dermal absorption likely contributed to firefighters' exposures in this study. Firefighters' exposures will vary by job assignment and can be reduced by employing a transitional fire attack when feasible.
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Affiliation(s)
- Kenneth W Fent
- Division of Surveillance, Hazard Evaluations, and Field Studies, National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), Cincinnati, OH, USA.
| | - Christine Toennis
- Division of Applied Research and Technology, NIOSH, CDC, Cincinnati, OH, USA
| | - Deborah Sammons
- Division of Applied Research and Technology, NIOSH, CDC, Cincinnati, OH, USA
| | - Shirley Robertson
- Division of Applied Research and Technology, NIOSH, CDC, Cincinnati, OH, USA
| | - Stephen Bertke
- Division of Surveillance, Hazard Evaluations, and Field Studies, National Institute for Occupational Safety and Health (NIOSH), Centers for Disease Control and Prevention (CDC), Cincinnati, OH, USA
| | - Antonia M Calafat
- Division of Laboratory Services, National Center for Environmental Health, CDC, Atlanta, GA, USA
| | - Joachim D Pleil
- National Exposure Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - M Ariel Geer Wallace
- National Exposure Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Steve Kerber
- Firefighter Safety Research Institute, Underwriters Laboratories, Columbia, MD, USA
| | - Denise Smith
- Skidmore College, Saratoga Springs, New York, NY, USA
- Illinois Fire Service Institute, University of Illinois at Urbana-, Champaign, IL, USA
| | - Gavin P Horn
- Illinois Fire Service Institute, University of Illinois at Urbana-, Champaign, IL, USA
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Persoons R, Roseau L, Petit P, Hograindleur C, Montlevier S, Marques M, Ottoni G, Maitre A. Towards a recommended biomonitoring strategy for assessing the occupational exposure of roofers to PAHs. Toxicol Lett 2020; 324:54-64. [PMID: 32007588 DOI: 10.1016/j.toxlet.2020.01.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/03/2020] [Accepted: 01/30/2020] [Indexed: 10/25/2022]
Abstract
The aims of this work were to assess the PAH exposure among roofers and to identify relevant biomarkers for monitoring occupational exposure. Several campaigns were conducted between 2004 and 2017, with 28 individual air samples and 240 urinary samples collected from 73 roofers. Seventeen parent PAHs and 14 urinary biomarkers, metabolites of pyrene (1-OHP), benzo(a)pyrene (3-OHBaP and TetraolBaP), naphthalene (1- and 2-naphtols), fluorene (1- 2- 3- 9-fluorenols) and phenanthrene (1- 2- 3- 4- 9-phenanthrols), were analysed. Three exposure groups were considered: soft-applied roofing using polymer-modified bitumen ("PMB"), hot-applied roofing using oxidized bitumen ("OB") and the tearing off of old roof coatings containing coal tar ("CT"). The PAHs containing 2-3 rings were much more abundant, and the highest airborne levels were observed in the "CT" group. The biomonitoring results were consistent with these results, with a large predominance of 2-3 ring PAH metabolites. 1-OHP, 3-fluorenol and 2-phenanthrol were better correlated with airborne levels and less influenced by smoking than the other metabolites. Conversely, 1-/2-naphtol levels were heavily influenced by smoking and not correlated with airborne naphthalene levels. Moreover, 3-OHBaP and TetraolBaP levels were very low when applying bitumen membranes, and much higher exposures were observed during tear-off activities. In this context, the recommended strategy for roofer biomonitoring should include 1-OHP, fluorenols and phenanthrols, as well as carcinogenic BaP metabolites (3-OHBaP or TetraolBaP) when evaluating the occupational exposure of roofers that are tearing off old roof coatings.
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Affiliation(s)
- Renaud Persoons
- Occupational and Environmental Toxicology Laboratory, Biology and Pathology Institute, CHU Grenoble Alpes, France; EPSP Team, TIMC IMAG Laboratory, UMR CNRS 5525, Medical University, Université Grenoble Alpes, France.
| | - Laure Roseau
- Occupational and Environmental Toxicology Laboratory, Biology and Pathology Institute, CHU Grenoble Alpes, France
| | - Pascal Petit
- EPSP Team, TIMC IMAG Laboratory, UMR CNRS 5525, Medical University, Université Grenoble Alpes, France
| | - Claire Hograindleur
- Occupational and Environmental Toxicology Laboratory, Biology and Pathology Institute, CHU Grenoble Alpes, France
| | - Sarah Montlevier
- Occupational and Environmental Toxicology Laboratory, Biology and Pathology Institute, CHU Grenoble Alpes, France
| | - Marie Marques
- EPSP Team, TIMC IMAG Laboratory, UMR CNRS 5525, Medical University, Université Grenoble Alpes, France
| | | | - Anne Maitre
- Occupational and Environmental Toxicology Laboratory, Biology and Pathology Institute, CHU Grenoble Alpes, France; EPSP Team, TIMC IMAG Laboratory, UMR CNRS 5525, Medical University, Université Grenoble Alpes, France
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15
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Fent KW, Toennis C, Sammons D, Robertson S, Bertke S, Calafat AM, Pleil JD, Geer Wallace MA, Kerber S, Smith DL, Horn GP. Firefighters' and instructors’ absorption of PAHs and benzene during training exercises. Int J Hyg Environ Health 2019; 222:991-1000. [PMID: 31272797 PMCID: PMC8848677 DOI: 10.1016/j.ijheh.2019.06.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/04/2019] [Accepted: 06/19/2019] [Indexed: 01/09/2023]
Abstract
Introduction: Training fires may constitute a major portion of some firefighters’ occupational exposures to smoke. However, the magnitude and composition of those exposures are not well understood and may vary by the type of training scenario and fuels. Objectives: To understand how structure fire training contributes to firefighters’ and instructors’ select chemical exposures, we conducted biological monitoring during exercises involving combustion of pallet and straw and oriented strand board (OSB) or the use of simulated smoke. Methods: Urine was analyzed for metabolites of polycyclic aromatic hydrocarbons (PAHs) and breath was analyzed for volatile organic compounds (VOCs) including benzene. Results: Median concentrations of nearly all PAH metabolites in urine increased from pre-to 3-hr post-training for each scenario and were highest for OSB, followed by pallet and straw, and then simulated smoke. For instructors who supervised three trainings per day, median concentrations increased at each collection. A single day of OSB exercises led to a 30-fold increase in 1-hydroxypyrene for instructors, culminating in a median endof-shift concentration 3.5-fold greater than median levels measured from firefighters in a previous controlledresidential fire study. Breath concentrations of benzene increased 2 to 7-fold immediately after the training exercises (with the exception of simulated smoke training). Exposures were highest for the OSB scenario and instructors accumulated PAHs with repeated daily exercises. Conclusions: Dermal absorption likely contributed to the biological levels as the respiratory route was well protected. Training academies should consider exposure risks as well as instructional objectives when selecting training exercises.
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16
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Wallace MAG, Pleil JD, Oliver KD, Whitaker DA, Mentese S, Fent KW, Horn GP. Targeted GC-MS analysis of firefighters' exhaled breath: Exploring biomarker response at the individual level. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2019; 16:355-366. [PMID: 30932751 PMCID: PMC7027924 DOI: 10.1080/15459624.2019.1588973] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Biomarker measurements can provide unambiguous evidence of environmental exposures as well as the resultant biological responses. Firefighters have a high rate of occupational cancer incidence, which has been proposed to be linked in part to their increased environmental exposure to byproducts of combustion and contaminants produced during fire responses. In this article, the uptake and elimination of targeted volatile organic compounds were investigated by collecting the exhaled breath of firefighters on sorbent tubes before and after controlled structure burns and analyzing samples using automated thermal desorption-gas chromatography (ATD-GC/MS). Volatile organic compounds exposure was assessed by grouping the data according to firefighting job positions as well as visualizing the data at the level of the individual firefighter to determine which individuals had expected exposure responses. When data were assessed at the group level, benzene concentrations were found to be elevated post-exposure in both fire attack, victim search, and outside ventilation firefighting positions. However, the results of the data analysis at the individual level indicate that certain firefighters may be more susceptible to post-exposure volatile organic compounds increases than others, and this should be considered when assessing the effectiveness of firefighting protective gear. Although this work focuses on firefighting activity, the results can be translated to potential human health and ecological effects from building and forest fires.
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Affiliation(s)
- M Ariel Geer Wallace
- a U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory , Research Triangle Park , North Carolina
| | - Joachim D Pleil
- a U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory , Research Triangle Park , North Carolina
| | - Karen D Oliver
- a U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory , Research Triangle Park , North Carolina
| | - Donald A Whitaker
- a U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory , Research Triangle Park , North Carolina
| | - Sibel Mentese
- b Department of Environmental Engineering , Çanakkale Onsekiz Mart University , Merkez/ Çanakkale , Turkey
| | - Kenneth W Fent
- c Division of Surveillance, Hazard Evaluations and Field Studies , National Institute for Occupational Safety and Health (NIOSH) , Cincinnati , Ohio
| | - Gavin P Horn
- d Illinois Fire Service Institute, University of Illinois at Urbana-Champaign , Champaign , Illinois
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O’Lenick CR, Pleil JD, Stiegel MA, Sobus JR, Wallace MAG. Detection and analysis of endogenous polar volatile organic compounds (PVOCs) in urine for human exposome research. Biomarkers 2019; 24:240-248. [PMID: 30475075 PMCID: PMC10614422 DOI: 10.1080/1354750x.2018.1548031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/24/2018] [Accepted: 11/04/2018] [Indexed: 12/14/2022]
Abstract
Background: The human exposome, defined as '…everything that is not the genome', comprises all chemicals in the body interacting with life processes. The exposome drives genes x environment (GxE) interactions that can cause long-term latency and chronic diseases. The exposome constantly changes in response to external exposures and internal metabolism. Different types of compounds are found in different biological media. Objective: Measure polar volatile organic compounds (PVOCs) excreted in urine to document endogenous metabolites and exogenous compounds from environmental exposures. Methods: Use headspace collection and sorbent tube thermal desorption coupled with bench-top gas chromatography-mass spectrometry (GC-MS) for targeted and non-targeted approaches. Identify and categorize PVOCs that may distinguish among healthy and affected individuals. Results: Method is successfully demonstrated to tabulate a series of 28 PVOCs detected in human urine across 120 samples from 28 human subjects. Median concentrations range from below detect to 165 ng/mL. Certain PVOCs have potential health implications. Conclusions: Headspace collection with sorbent tubes is an effective method for documenting PVOCs in urine that are otherwise difficult to measure. This methodology can provide probative information regarding biochemical processes and adverse outcome pathways (AOPs) for toxicity testing.
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Affiliation(s)
| | - Joachim D. Pleil
- U.S. Environmental Protection Agency, Exposure Methods and Measurements Division, NERL/ORD, Research Triangle Park, NC, USA
| | | | - Jon R. Sobus
- U.S. Environmental Protection Agency, Exposure Methods and Measurements Division, NERL/ORD, Research Triangle Park, NC, USA
| | - M. Ariel Geer Wallace
- U.S. Environmental Protection Agency, Exposure Methods and Measurements Division, NERL/ORD, Research Triangle Park, NC, USA
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Mozurkewich EL, Berman DR, Vahratian A, Clinton CM, Romero VC, Chilimigras JL, Vazquez D, Qualls C, Djuric Z. Effect of prenatal EPA and DHA on maternal and umbilical cord blood cytokines. BMC Pregnancy Childbirth 2018; 18:261. [PMID: 29940888 PMCID: PMC6019705 DOI: 10.1186/s12884-018-1899-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/14/2018] [Indexed: 01/09/2023] Open
Abstract
Background Investigators have hypothesized that omega-3 fatty acid supplementation may modulate the immune response. However, available evidence is conflicting. We performed this study to investigate the effect of prenatal eicosapentaenoic acid (EPA)- and docosahexaenoic acid (DHA)-rich fish oil supplementation on maternal and fetal cytokine production. Methods This study is a secondary analysis of a randomized controlled trial designed to assess whether prenatal EPA- or DHA-rich fish oil supplementation would prevent perinatal depressive symptoms among women at risk. Enrolled participants received EPA-rich fish oil (1060 mg EPA plus 274 mg DHA), DHA-rich fish oil (900 mg DHA plus 180 mg EPA) or soy oil placebo. Maternal venous blood was collected at enrollment (12–20 weeks gestation) and after supplementation (34–36 weeks gestation). Umbilical cord blood was collected at delivery. We analyzed stored plasma specimens for 16 human cytokines using multiplex immunoassays. Maternal and cord blood cytokine levels were compared among the treatment groups. Associations of serum DHA and EPA with maternal and cord blood cytokines were explored via regression analysis. Results We enrolled 126 women, of whom 118 completed the trial. Prenatal supplementation with EPA-rich fish oil significantly lowered maternal IL6, IL15, and TNFα concentrations. However, supplementation with DHA-rich fish oil had no significant effect on maternal cytokine profiles. Maternal serum DHA fraction was significantly associated with IL1α, and maternal serum DHA and EPA fractions were significantly associated with IL 10 concentrations after supplementation. Compared with placebo, supplementation with EPA- or DHA-rich fish oils had no significant effect on cord blood cytokine concentrations. Conclusions Prenatal supplementation with EPA-rich fish oil significantly reduced levels of several inflammatory cytokines in maternal plasma, while prenatal DHA-rich fish oil had no significant effect on cytokine concentrations. Supplementation with EPA- and DHA- rich fish oil had no significant effect on umbilical cord blood cytokine concentrations. Trial registration Clinical Trial Registration: registration number NCT00711971 7/7/2008.
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Affiliation(s)
- Ellen L Mozurkewich
- Department of Obstetrics and Gynecology, University of New Mexico School of Medicine, MSC 10 5580, 1 University of New Mexico, Albuquerque, NM, 87131, USA.
| | - Deborah R Berman
- Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA
| | - Anjel Vahratian
- Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA
| | | | - Vivian C Romero
- Obstetrics and Gynecology, Spectrum Health Maternal Fetal Medicine, Grand Rapids, MI/Michigan State University College of Human Medicine, East Lansing, MI, USA
| | - Julie L Chilimigras
- Department of Obstetrics and Gynecology, University of New Mexico School of Medicine, MSC 10 5580, 1 University of New Mexico, Albuquerque, NM, 87131, USA
| | - Delia Vazquez
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
| | - Clifford Qualls
- Clinical and Translational Center, University of New Mexico, Albuquerque, NM, USA
| | - Zora Djuric
- Family Medicine, University of Michigan, Ann Arbor, MI, USA
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Persoons R, Richard J, Herve C, Montlevier S, Marques M, Maitre A. Biomonitoring of styrene occupational exposures: Biomarkers and determinants. Toxicol Lett 2018; 298:99-105. [PMID: 29940302 DOI: 10.1016/j.toxlet.2018.06.1211] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/25/2018] [Accepted: 06/19/2018] [Indexed: 01/20/2023]
Abstract
INTRODUCTION High styrene exposures are still experienced in various occupational settings, requesting regular exposure assessments. The aims of this study were to study occupational exposures in various industrial sectors and to determine factors influencing styrene urinary metabolites levels. METHODS Biomonitoring was conducted in 141 workers from fiberglass-reinforced plastic (FRP) manufacture, thermoplastic polymers production, vehicle repair shops and cured-in-place pipe lining (CIPP). Urinary styrene (StyU) as well as Mandelic (MA) / Phenyglyoxylic Acids (PGA) were quantified at the beginning and at the end of week, and multivariate linear regression models were used. RESULTS StyU levels revealed very low, rarely exceeding 3 μg.L-1. Highest concentrations of MA + PGA were observed in FRP sector, with levels reaching up to 1100 mg.g-1 of creatinine. Factors influencing end-of-week MA + PGA concentrations were levels at the beginning of week, open molding processes, proximity to the emission source, respiratory protection, styrene content in raw materials. Elevated levels were also observed during CIPP process, whereas thermoplastic injection and vehicle repair shop workers exhibited much lower exposures. CONCLUSIONS Intervention on process (decreasing styrene proportion, using closed molding), protective equipment (local exhaust ventilation, respiratory protection) and individual practices (stringent safety rules) are expected to decrease occupational exposures. Urinary MA + PGA remain the most appropriate biomarkers for occupational biomonitoring.
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Affiliation(s)
- Renaud Persoons
- Laboratoire de Toxicologie Professionnelle et Environnementale, Département de Biochimie Toxicologie Pharmacologie (DBTP), Pôle de Biologie, Institut de Biologie et Pathologie, CHU Grenoble Alpes, France; Equipe EPSP, Laboratoire TIMC, UMR CNRS 5525, Faculté de Médecine, Université Grenoble Alpes, France.
| | - Justine Richard
- Centre de consultations de pathologies professionnelles (CCPP), Département de Médecine et Santé au Travail, CHU Grenoble Alpes, France; Laboratoire de Toxicologie Professionnelle et Environnementale, Département de Biochimie Toxicologie Pharmacologie (DBTP), Pôle de Biologie, Institut de Biologie et Pathologie, CHU Grenoble Alpes, France
| | - Claire Herve
- Laboratoire de Toxicologie Professionnelle et Environnementale, Département de Biochimie Toxicologie Pharmacologie (DBTP), Pôle de Biologie, Institut de Biologie et Pathologie, CHU Grenoble Alpes, France
| | - Sarah Montlevier
- Laboratoire de Toxicologie Professionnelle et Environnementale, Département de Biochimie Toxicologie Pharmacologie (DBTP), Pôle de Biologie, Institut de Biologie et Pathologie, CHU Grenoble Alpes, France
| | - Marie Marques
- Equipe EPSP, Laboratoire TIMC, UMR CNRS 5525, Faculté de Médecine, Université Grenoble Alpes, France
| | - Anne Maitre
- Laboratoire de Toxicologie Professionnelle et Environnementale, Département de Biochimie Toxicologie Pharmacologie (DBTP), Pôle de Biologie, Institut de Biologie et Pathologie, CHU Grenoble Alpes, France; Equipe EPSP, Laboratoire TIMC, UMR CNRS 5525, Faculté de Médecine, Université Grenoble Alpes, France
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Pleil JD, Wallace MAG, Stiegel MA, Funk WE. Human biomarker interpretation: the importance of intra-class correlation coefficients (ICC) and their calculations based on mixed models, ANOVA, and variance estimates. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2018; 21:161-180. [PMID: 30067478 PMCID: PMC6704467 DOI: 10.1080/10937404.2018.1490128] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Human biomonitoring is the foundation of environmental toxicology, community public health evaluation, preclinical health effects assessments, pharmacological drug development and testing, and medical diagnostics. Within this framework, the intra-class correlation coefficient (ICC) serves as an important tool for gaining insight into human variability and responses and for developing risk-based assessments in the face of sparse or highly complex measurement data. The analytical procedures that provide data for clinical and public health efforts are continually evolving to expand our knowledge base of the many thousands of environmental and biomarker chemicals that define human systems biology. These chemicals range from the smallest molecules from energy metabolism (i.e., the metabolome), through larger molecules including enzymes, proteins, RNA, DNA, and adducts. In additiona, the human body contains exogenous environmental chemicals and contributions from the microbiome from gastrointestinal, pulmonary, urogenital, naso-pharyngeal, and skin sources. This complex mixture of biomarker chemicals from environmental, human, and microbiotic sources comprise the human exposome and generally accessed through sampling of blood, breath, and urine. One of the most difficult problems in biomarker assessment is assigning probative value to any given set of measurements as there are generally insufficient data to distinguish among sources of chemicals such as environmental, microbiotic, or human metabolism and also deciding which measurements are remarkable from those that are within normal human variability. The implementation of longitudinal (repeat) measurement strategies has provided new statistical approaches for interpreting such complexities, and use of descriptive statistics based upon intra-class correlation coefficients (ICC) has become a powerful tool in these efforts. This review has two parts; the first focuses on the history of repeat measures of human biomarkers starting with occupational toxicology of the early 1950s through modern applications in interpretation of the human exposome and metabolic adverse outcome pathways (AOPs). The second part reviews different methods for calculating the ICC and explores the strategies and applications in light of different data structures.
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Affiliation(s)
- Joachim D. Pleil
- Office of Research and Development, US Environmental Protection Agency (EPA), Research Triangle Park, NC, USA
| | - M. Ariel Geer Wallace
- Office of Research and Development, US Environmental Protection Agency (EPA), Research Triangle Park, NC, USA
| | - Matthew A. Stiegel
- Department of Occupational and Environmental Safety, Duke University Medical Center, Durham, NC, USA
| | - William E. Funk
- Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
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