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Chen YX, Zheng J, Zhang XF. Association analysis between organophosphorus flame retardants exposure and the risk of depression: Data from NHANES 2017-2018. J Affect Disord 2024; 355:385-391. [PMID: 38574866 DOI: 10.1016/j.jad.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 03/18/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Organophosphorus flame retardants (OPFRs) can damage the brain and may cause abnormal behaviors. There was no population-based study to reveal the relationship between OPFRs and the occurrence of depression. This study utilized a publicly available database to investigate the correlation between OPFRs exposure and the risk of depression, and the mediation effect of inflammation on the correlation. METHODS Data in this study was from the database of the National Health and Nutrition Examination Survey. Multifactorial logistic regression was used to estimate the relationship between OPFRs exposure and the risk of depression, and a mediation effect model was constructed to explore the impact of inflammation on the correlation. RESULTS Data of 1273 participants was included in the study. It was found that individuals with high urinary concentration of bis-(2-chloroethyl) phosphate had an increased risk of developing depression (OR = 1.217, 95 % CI: 1.032-1.435). Combined exposure to OPFRs was significantly associated with the increased risk of depression than single OPFRs exposure. Subgroup analyses based on inflammatory levels in the body revealed that inflammation might exert the mediation effect on the association between OPFRs exposure and the risk of depression, with the contribution proportion of 8.23 %. LIMITATIONS Cross-sectional data and rapid metabolism of OPFRs lead to uncertainty in revealing long-term exposure in the body. CONCLUSIONS There was a correlation between OPFRs exposure and the risk of depression, which may be mediated by inflammation in the body to some extent.
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Affiliation(s)
- Yi-Xin Chen
- Department of Toxicology, Public Health School, Harbin Medical University, No 157, Baojian Road, Nangang District, Harbin City 150081, Heilongjiang Province, China
| | - Jing Zheng
- Department of Environmental Health, Heilongjiang Provincial Center for Disease Prevention and Control, No 40, Youfang Street, Xiangfang District, Harbin City 150030, Heilongjiang Province, China
| | - Xiao-Feng Zhang
- Department of Toxicology, Public Health School, Harbin Medical University, No 157, Baojian Road, Nangang District, Harbin City 150081, Heilongjiang Province, China.
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Mao H, Lin T, Huang S, Xie Z, Jin S, Shen X, Jin Y, Ding Y. The impact of brominated flame retardants (BFRs) on pulmonary function in US adults: a cross-sectional study based on NHANES (2007-2012). Sci Rep 2024; 14:6486. [PMID: 38499858 PMCID: PMC10948772 DOI: 10.1038/s41598-024-57302-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/16/2024] [Indexed: 03/20/2024] Open
Abstract
Brominated flame retardants (BFRs) are a group of chemicals widely used in various applications to prevent or slow down the spread of fire. However, they have adverse effects on human health. There is a relative scarcity of population-based studies regarding BFRs, particularly their impact on the respiratory system. This study aimed to investigate the influence of BFRs on pulmonary function using data from the National Health and Nutrition Examination Survey. The study found that elevated serum concentrations of certain BFRs were associated with pulmonary ventilatory dysfunction. Adjusted analyses revealed positive correlations between PBDE47, PBDE183, and PBDE209 concentrations and ventilatory dysfunction. The analysis of mixed BFRs showed a positive relationship with pulmonary ventilation dysfunction, with PBDE47 making the most significant contribution. Our study demonstrates that both individual and combined BFRs exposure can lead to impaired pulmonary ventilation function. These findings provide evidence of the adverse effects of BFRs on lung function, emphasizing the importance of further investigating the potential health consequences of these compounds. Further large-scale longitudinal studies are needed to investigate this relationship in the future.
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Affiliation(s)
- Haiyan Mao
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Tong Lin
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Shanshan Huang
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Zhenye Xie
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Shaofeng Jin
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Xingkai Shen
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China
| | - Yuhong Jin
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China.
| | - Yi Ding
- Department of Critical Care Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, 315100, China.
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Wu X, Zhang D, Chen Y, Shen J, Li X, Zheng Q, Ma J, Xu J, Rao M, Liu X, Lu S. Organophosphate ester exposure among Chinese waste incinerator workers: Urinary levels, risk assessment and associations with oxidative stress. Sci Total Environ 2023; 854:158808. [PMID: 36115409 DOI: 10.1016/j.scitotenv.2022.158808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/04/2022] [Accepted: 09/12/2022] [Indexed: 06/15/2023]
Abstract
Organophosphate esters (OPEs), which are frequently used as flame retardants and plasticizers in versatile products, are readily released to the external environment. Although workers at municipal waste incineration plants may be extensively exposed to OPEs, only scarce health monitoring and risk assessments have been conducted in this population. In this study, we investigated the levels of eight metabolites of organophosphate esters (mOPEs) and the oxidative stress marker 8-hydroxy-2-deoxyguanosine (8-OHdG) in urine samples from 73 waste incinerator workers and 97 general residents from Shenzhen, China between September 2016 and June 2017. The overall detection rate of mOPEs was 82.2 %-100 %, and higher concentrations of di-p-cresyl phosphate and chlorinated mOPEs [bis(2-chloroethyl) phosphate (BCEP), bis(1-chloro-2propyl) phosphate (BCIPP), bis(1,3-dichloro-2-propyl) phosphate) (BDCIPP)] were found among incinerator workers than among general residents. The incinerator workers also showed significantly higher levels of 8-OHdG than general residents, but the measured levels of most mOPEs were not significantly correlated with the level of 8-OHdG; this may be because co-exposure to multiple toxic compounds can lead to oxidative stress. Risk assessment using Monte Carlo simulations revealed that 95 % of the incinerator workers were free from non-carcinogenic effects due to OPEs exposure (hazard index = 0.27, 95 % CI: 0.09, 0.77). However, the carcinogenic risk of tris(2-chloroethyl) phosphate (TCEP) for incinerator workers was between 10-6 and 10-4. These results indicate that incinerator workers are extensively exposed to OPEs, and better protective measures need to be implemented.
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Affiliation(s)
- Xiaoling Wu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Duo Zhang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Yining Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Junchun Shen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Xiangyu Li
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Quanzhi Zheng
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Jiaojiao Ma
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Jiayi Xu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Manting Rao
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China
| | - Xiang Liu
- Department of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China.
| | - Shaoyou Lu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China.
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Tsai KF, Cheng FJ, Huang WT, Kung CT, Lee CT, Cheng BC, Chen JB, Li SH, Wang CC, Wang LJ, Ou YC, Lee WC. The associations between renal disease severity and exposure to organophosphate flame retardants in patients with chronic kidney disease. Environ Int 2022; 170:107573. [PMID: 36240623 DOI: 10.1016/j.envint.2022.107573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 09/25/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Organophosphate flame retardants (OPFRs) are emerging and widespread environmental pollutants with potential health hazards, including nephrotoxicity. However, the exposure patterns and nephrotoxic potential of OPFRs are yet to be investigated in patients with chronic kidney disease (CKD). We conducted a cross-sectional study involving 166 patients with CKD stratified by estimated glomerular filtration rate (eGFR) and severity of proteinuria. The urinary concentrations of 10 OPFR compounds were measured to evaluate the exposure patterns. Clinical and urinary OPFR profiles were compared among subgroups to identify whether the OPFR compounds were independently correlated with eGFR and proteinuria. Additionally, lifestyle factors were compared among subgroups stratified by median concentrations of urinary OPFR compounds associated with renal disease severity. This study revealed universal exposure to OPFRs in the CKD population, with an overall urinary detection rate of 98.80 %. Furthermore, after adjusting for covariates, the urinary concentration of bis(2-chloroethyl) phosphate (BCEP) was identified as an independent predictor of lower eGFR (low vs high eGFR, odds ratio (OR) (95 % confidence interval (CI)), 1.761 (1.032-3.005) per log μg/g creatinine, p = 0.038), and the urinary concentration of bis(2-butoxyethyl) phosphate (BBOEP) was independently correlated with overt proteinuria in CKD patients (with vs without overt proteinuria, OR (95 % CI), 1.813 (1.065-3.086) per log μg/g creatinine, p = 0.028). Moreover, frequent seafood consumption was negatively correlated with urinary BCEP concentration (high vs low BCEP, OR (95 % CI), 0.455 (0.228-0.908), p = 0.025), and age was inversely associated with urinary BBOEP concentration (high vs low BBOEP, OR (95 % CI), 0.968 (0.937-0.999) per year, p = 0.048). In conclusion, our investigation highlights the extensive exposure to OPFRs and the independent association between renal disease severity and urinary BCEP/BBOEP concentrations in the CKD population, indicating the nephrotoxic potential of these pollutants.
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Affiliation(s)
- Kai-Fan Tsai
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Fu-Jen Cheng
- Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Wan-Ting Huang
- Department of Laboratory Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chia-Te Kung
- Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chien-Te Lee
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ben-Chung Cheng
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Jin-Bor Chen
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan; School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan, R.O.C
| | - Shau-Hsuan Li
- Division of Hematology-Oncology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chin-Chou Wang
- Department of Occupational Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Liang-Jen Wang
- Department of Child and Adolescent Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yu-Che Ou
- Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Wen-Chin Lee
- Division of Nephrology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
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Strawn JR, Xu Y, Cecil KM, Khoury J, Altaye M, Braun JM, Lanphear BP, Sjodin A, Chen A, Yolton K. Early exposure to flame retardants is prospectively associated with anxiety symptoms in adolescents: A prospective birth cohort study. Depress Anxiety 2022; 39:780-793. [PMID: 36218051 PMCID: PMC10092502 DOI: 10.1002/da.23284] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/05/2022] [Accepted: 09/11/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Anxiety disorders emerge during childhood and adolescence and are frequently preceded by subsyndromal anxiety symptoms. Environmental toxicants, including gestational polybrominated diphenyl ether (PBDE) exposure, are associated with neuropsychiatric sequelae; however, the role of PBDEs as risk factors for anxiety in adolescence is unclear. METHODS Using data from the Health Outcomes and Measures of the Environment (HOME) Study, a prospective pregnancy and birth cohort enrolled from 2003 to 2006, we investigated the relationship between gestational serum PBDE concentrations and anxiety symptoms in adolescents (N = 236). We measured five PBDE congeners (PBDE-28, -47, -99, -100, and -153) at 16 ± 3 weeks of gestation and calculated their sum (∑PBDE). We assessed self-reported anxiety symptoms using the Screen for Child Anxiety Related Emotional Disorders (SCARED) and depressive symptoms using the Children's Depression Inventory (CDI-2) at age 12 years. We estimated the associations of maternal PBDE concentrations with child anxiety and depressive symptoms using multivariable linear regression and modified Poisson regression. Covariates included child sex, maternal race, maternal age at delivery, maternal marital status, maternal education, and household income at the 12-year study visit as well as maternal depressive and anxiety symptoms. Sensitivity analyses were performed to control for maternal lead and mercury at delivery. RESULTS After adjusting for predetermined covariates, each doubling in maternal PBDE concentrations was associated with increased SCARED scores (e.g., for ∑PBDE, SCARED total score, β = 1.6 95% confidence interval [CI]: 0.3-2.9, p = .019) and a nonsignificant increase in depressive symptoms (e.g., for CDI total score, β = .8, 95% CI: -0.2-1.8, p = .11). CONCLUSIONS Gestational serum PBDE concentrations just before mid-pregnancy and during a period of active cortical and limbic neurogenesis, synaptogenesis and myelogenesis may be a risk factor for developing anxiety symptoms in early adolescence.
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Affiliation(s)
- Jeffrey R. Strawn
- Department of Psychiatry and Behavioral Neuroscience, Anxiety Disorders Research Program, College of MedicineUniversity of CincinnatiCincinnatiOhioUSA
- Department of Pediatrics, Cincinnati Children's Hospital Medical CenterDivision of Clinical PharmacologyCincinnatiOhioUSA
| | - Yingying Xu
- Department of Pediatrics, Cincinnati Children's Hospital Medical CenterDivision of General and Community PediatricsCincinnatiOhioUSA
| | - Kim M. Cecil
- Department of Radiology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of MedicineUniversity of CincinnatiCincinnatiOhioUSA
- Department of Environmental and Public Health Sciences, University of Cincinnati College of MedicineUniversity of CincinnatiCincinnatiOhioUSA
- Department of Radiology, University of Cincinnati College of MedicineUniversity of CincinnatiCincinnatiOhioUSA
| | - Jane Khoury
- Department of Pediatrics, Division of Biostatistics and EpidemiologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Mekibib Altaye
- Department of Pediatrics, Division of Biostatistics and EpidemiologyCincinnati Children's Hospital Medical CenterCincinnatiOhioUSA
| | - Joseph M. Braun
- Department of EpidemiologyBrown University School of Public HealthProvidenceRhode IslandUSA
| | - Bruce P. Lanphear
- BC Children's Hospital Research InstituteSimon Fraser UniversityBurnabyBritish ColumbiaCanada
| | - Andreas Sjodin
- Division of Laboratory SciencesCenters for Disease Control and PreventionAtlantaGeorgiaUSA
| | - Aimin Chen
- Department of Biostatistics, Epidemiology and InformaticsUniversity of Pennsylvania Perelman School of MedicinePhiladelphiaPennsylvaniaUSA
| | - Kimberly Yolton
- Department of Pediatrics, Cincinnati Children's Hospital Medical CenterDivision of General and Community PediatricsCincinnatiOhioUSA
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Percy Z, Vuong AM, Xu Y, Xie C, Ospina M, Calafat AM, Hoofnagle A, Lanphear BP, Braun JM, Cecil KM, Dietrich KN, Yolton K, Chen A. Maternal Urinary Organophosphate Esters and Alterations in Maternal and Neonatal Thyroid Hormones. Am J Epidemiol 2021; 190:1793-1802. [PMID: 33778842 DOI: 10.1093/aje/kwab086] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 12/23/2022] Open
Abstract
Production of organophosphate esters (OPEs), which represent a major flame-retardant class present in consumer goods, has increased over the past 2 decades. Experimental studies suggest that OPEs may be associated with thyroid hormone disruption, but few human studies have examined this association. We quantified OPE metabolites in the urine of 298 pregnant women from Cincinnati, Ohio, in the Health Outcomes and Measures of the Environment Study (enrolled 2003-2006) at 3 time points (16 and 26 weeks' gestation, and at delivery), and thyroid hormones in 16-week maternal and newborn cord sera. Urinary bis(1,3-dichloro-2-propyl)-phosphate concentrations were generally associated with decreased triiodothyronine and thyroxine levels and increased thyroid-stimulating hormone levels in maternal and newborn thyroid hormones in quartile dose-response analyses and multiple informant models. There was weaker evidence for thyroid hormone alterations in association with diphenyl-phosphate and di-n-butyl-phosphate. Bis-2-chloroethyl-phosphate was not associated with alterations in thyroid hormones in any analyses. We did not observe any evidence of effect modification by infant sex. These results suggest that gestational exposure to some OPEs may influence maternal and neonatal thyroid function, although replication in other cohorts is needed.
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Negi CK, Khan S, Dirven H, Bajard L, Bláha L. Flame Retardants-Mediated Interferon Signaling in the Pathogenesis of Nonalcoholic Fatty Liver Disease. Int J Mol Sci 2021; 22:ijms22084282. [PMID: 33924165 PMCID: PMC8074384 DOI: 10.3390/ijms22084282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/14/2021] [Accepted: 04/16/2021] [Indexed: 02/06/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a growing concern worldwide, affecting 25% of the global population. NAFLD is a multifactorial disease with a broad spectrum of pathology includes steatosis, which gradually progresses to a more severe condition such as nonalcoholic steatohepatitis (NASH), fibrosis, cirrhosis, and eventually leads to hepatic cancer. Several risk factors, including exposure to environmental toxicants, are involved in the development and progression of NAFLD. Environmental factors may promote the development and progression of NAFLD by various biological alterations, including mitochondrial dysfunction, reactive oxygen species production, nuclear receptors dysregulation, and interference in inflammatory and immune-mediated signaling. Moreover, environmental contaminants can influence immune responses by impairing the immune system’s components and, ultimately, disease susceptibility. Flame retardants (FRs) are anthropogenic chemicals or mixtures that are being used to inhibit or delay the spread of fire. FRs have been employed in several household and outdoor products; therefore, human exposure is unavoidable. In this review, we summarized the potential mechanisms of FRs-associated immune and inflammatory signaling and their possible contribution to the development and progression of NAFLD, with an emphasis on FRs-mediated interferon signaling. Knowledge gaps are identified, and emerging pharmacotherapeutic molecules targeting the immune and inflammatory signaling for NAFLD are also discussed.
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Affiliation(s)
- Chander K. Negi
- Faculty of Science, RECETOX, Masaryk University, Kamenice 5, CZ62500 Brno, Czech Republic; (L.B.); (L.B.)
- Correspondence: or
| | - Sabbir Khan
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA;
| | - Hubert Dirven
- Department of Environmental Health, Section for Toxicology and Risk Assessment, Norwegian Institute of Public Health, 0456 Oslo, Norway;
| | - Lola Bajard
- Faculty of Science, RECETOX, Masaryk University, Kamenice 5, CZ62500 Brno, Czech Republic; (L.B.); (L.B.)
| | - Luděk Bláha
- Faculty of Science, RECETOX, Masaryk University, Kamenice 5, CZ62500 Brno, Czech Republic; (L.B.); (L.B.)
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Eick SM, Hom Thepaksorn EK, Izano MA, Cushing LJ, Wang Y, Smith SC, Gao S, Park JS, Padula AM, DeMicco E, Valeri L, Woodruff TJ, Morello-Frosch R. Associations between prenatal maternal exposure to per- and polyfluoroalkyl substances (PFAS) and polybrominated diphenyl ethers (PBDEs) and birth outcomes among pregnant women in San Francisco. Environ Health 2020; 19:100. [PMID: 32938446 PMCID: PMC7495899 DOI: 10.1186/s12940-020-00654-2] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/10/2020] [Indexed: 05/22/2023]
Abstract
BACKGROUND Perfluoroalkyl substances (PFAS) and polybrominated diphenyl ethers (PBDEs) are used in consumer products for their water repellent and flame retardant properties, respectively. However, there is widespread prenatal exposure and concern about their potential harm to the developing fetus. Here, we utilized data from a demographically diverse cohort of women in San Francisco, CA to examine associations between prenatal exposure to PFAS and PBDEs with gestational age and birth weight for gestational age z-scores. METHODS Women included in this analysis were enrolled in the Chemicals in our Bodies (CIOB) cohort study (N = 506). PFAS and PBDEs were measured in serum obtained during the second trimester of pregnancy. Linear regression models were used to calculate crude and adjusted β coefficients for the association between PFAS and PBDE concentrations in tertiles and gestational age and birth weight z-scores. Individual PFAS and PBDE concentrations, as well as their sums, were examined in separate models. RESULTS The highest compared to lowest tertile of BDE-47 was associated with shorter gestational age (β = - 0.49, 95% confidence interval [CI] = - 0.95, - 0.02). Additionally, exposure to BDE-47 and BDE-99 in the middle tertile was also associated with a reduction in birth weight z-scores (β = - 0.26, 95% CI = -0.48, - 0.04; β = - 0.25, 95% CI = -0.47, - 0.04, respectively) compared to those in the lowest tertile of exposure. No consistent associations were observed between increasing PFAS concentrations and gestational age or birth weight z-scores. DISCUSSION Among a diverse group of pregnant women in the San Francisco Bay Area, we found non-linear associations between prenatal exposure to PBDEs during the second trimester of pregnancy and birth weight z-scores. However, most PFAS congeners were not associated with adverse birth outcomes. PFAS and PBDE concentrations were lower in our cohort relative to other studies. Future research should assess the effects of emerging and persistent PFAS and PBDEs on birth outcomes, as some congeners are being phased out and replaced by chemically similar structures.
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Affiliation(s)
- Stephanie M. Eick
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Elizabeth K. Hom Thepaksorn
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Monika A. Izano
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Lara J. Cushing
- Department of Environmental Health Sciences, Fielding School of Public Health, University of California, Los Angeles, CA USA
| | - Yunzhu Wang
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, CA USA
| | - Sabrina Crispo Smith
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, CA USA
| | - Songmei Gao
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, CA USA
| | - June-Soo Park
- Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, CA USA
| | - Amy M. Padula
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Erin DeMicco
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Linda Valeri
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY USA
| | - Tracey J. Woodruff
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
| | - Rachel Morello-Frosch
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, CA USA
- Department of Environmental Science, Policy and Management and School of Public Health, University of California, Berkeley, CA USA
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9
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Greeson KW, Fowler KL, Estave PM, Kate Thompson S, Wagner C, Clayton Edenfield R, Symosko KM, Steves AN, Marder EM, Terrell ML, Barton H, Koval M, Marcus M, Easley CA. Detrimental effects of flame retardant, PBB153, exposure on sperm and future generations. Sci Rep 2020; 10:8567. [PMID: 32444626 PMCID: PMC7244482 DOI: 10.1038/s41598-020-65593-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 05/06/2020] [Indexed: 02/07/2023] Open
Abstract
In 1973, the Velsicol Chemical Company, which manufactured FireMaster, a brominated flame retardant, and NutriMaster, a nutritional supplement, mistakenly shipped hundreds of pounds of FireMaster to grain mills around Michigan where it was incorporated into animal feed and then into the food chain across the state. An estimated 6.5 million Michigan residents consumed polybrominated biphenyl (PBB)-laced animal products leading to one of the largest agricultural accidents in U.S. history. To date, there have been no studies investigating the effects of PBB on epigenetic regulation in sperm, which could explain some of the endocrine-related health effects observed among children of PBB-exposed parents. Fusing epidemiological approaches with a novel in vitro model of human spermatogenesis, we demonstrate that exposure to PBB153, the primary component of FireMaster, alters the epigenome in human spermatogenic cells. Using our novel stem cell-based spermatogenesis model, we show that PBB153 exposure decreases DNA methylation at regulatory elements controlling imprinted genes. Furthermore, PBB153 affects DNA methylation by reducing de novo DNA methyltransferase activity at increasing PBB153 concentrations as well as reducing maintenance DNA methyltransferase activity at the lowest tested PBB153 concentration. Additionally, PBB153 exposure alters the expression of genes critical to proper human development. Taken together, these results suggest that PBB153 exposure alters the epigenome by disrupting methyltransferase activity leading to defects in imprint establishment causing altered gene expression, which could contribute to health concerns in the children of men exposed to PBB153. While this chemical is toxic to those directly exposed, the results from this study indicate that the epigenetic repercussions may be detrimental to future generations. Above all, this model may be expanded to model a multitude of environmental exposures to elucidate the effect of various chemicals on germline epigenetics and how paternal exposure may impact the health of future generations.
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Affiliation(s)
- Katherine Watkins Greeson
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - Kristen L Fowler
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Cell Biology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Paige M Estave
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - S Kate Thompson
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - Chelsea Wagner
- Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - R Clayton Edenfield
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - Krista M Symosko
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA
| | - Alyse N Steves
- Neuropharmacology and Neurologic Diseases, Yerkes National Primate Research Center, Atlanta, GA, USA
| | - Elizabeth M Marder
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Metrecia L Terrell
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Hillary Barton
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Cell Biology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Michele Marcus
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Charles A Easley
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA.
- Regenerative Bioscience Center, University of Georgia, Athens, GA, USA.
- Neuropharmacology and Neurologic Diseases, Yerkes National Primate Research Center, Atlanta, GA, USA.
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10
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Pace CL, Horman B, Patisaul H, Muddiman DC. Analysis of neurotransmitters in rat placenta exposed to flame retardants using IR-MALDESI mass spectrometry imaging. Anal Bioanal Chem 2020; 412:3745-3752. [PMID: 32300844 DOI: 10.1007/s00216-020-02626-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/21/2020] [Accepted: 03/27/2020] [Indexed: 01/12/2023]
Abstract
Chemical exposures can adversely impact fetal development. For many compounds, including common flame retardants, the mechanisms by which this occurs remain unclear, but emerging evidence suggests that disruption at the level of the placenta may play a role. Understanding how the placenta might be vulnerable to chemical exposures is challenging due to its complex structure. The primary objective of this study was to develop a method for detecting placental neurotransmitters and related metabolites without chemical derivatization so changes in the abundance and spatial distribution of neurotransmitters in rat placenta following chemical exposure could be determined using infrared matrix-assisted laser desorption electrospray ionization (IR-MALDESI) mass spectrometry imaging. Without chemical derivatization, 49 neurotransmitters and their related metabolites were putatively identified in untreated rat placenta sections using mass measurement accuracy and spectral accuracy. A few neurotransmitters were less abundant in placentas that were exposed to various flame retardants and were further investigated by KEGG metabolic pathway analysis. Many of these downregulated neurotransmitters shared the same enzyme responsible for metabolism, aromaticl-amino acid decarboxylase, suggesting a mechanistic role. These data constitute a new approach that could help identify novel mechanisms of toxicity in complex tissues. Graphical abstract.
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Affiliation(s)
- Crystal L Pace
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, NC, 27695, USA
| | - Brian Horman
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
| | - Heather Patisaul
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, 27695, USA
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA
| | - David C Muddiman
- FTMS Laboratory for Human Health Research, Department of Chemistry, North Carolina State University, Raleigh, NC, 27695, USA.
- Center for Human Health and the Environment, North Carolina State University, Raleigh, NC, 27695, USA.
- Molecular Education, Technology and Research Innovation Center (METRIC), North Carolina State University, Raleigh, NC, 27695, USA.
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11
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Chen Y, Song Y, Chen YJ, Zhang Y, Li R, Wang Y, Qi Z, Chen ZF, Cai Z. Contamination profiles and potential health risks of organophosphate flame retardants in PM 2.5 from Guangzhou and Taiyuan, China. Environ Int 2020; 134:105343. [PMID: 31778934 DOI: 10.1016/j.envint.2019.105343] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 10/22/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Organophosphate flame retardants (OPFRs) are emerging contaminants in recent years. They can be present in the atmospheric fine particle (PM2.5), leading to potential adverse effects on humans. In this study, the concentrations and in vitro toxicities of OPFRs in PM2.5 samples were investigated for one year at Guangzhou and Taiyuan in China. Eleven OPFRs, including chloro-, aryl-, and alkyl-substituted OPFRs, were detected at total concentrations ranging from 3.10 to 544 ng m-3. Chloro-substituted OPFRs were the dominant contaminants. Based on the statistical analysis, the same contamination sources of all OPFRs were found except for tris(butoxyethyl) phosphate (TBOEP) and triethyl phosphate (TEP), which may come from traffic emission. The results of cell viability and dithiothreitol assays indicated that OPFRs and PM2.5 could induce the death of normal lung epithelial cells and the production of reactive oxygen species (ROS), respectively. According to the redundancy analysis, the distribution of OPFRs was significantly related to the PM2.5 concentrations and indirectly associated with ROS production induced by PM2.5 from Taiyuan. Exposure to PM2.5-bound OPFRs in Guangzhou and Taiyuan only posed minimum health risks to both toddlers and adults. These findings could provide important evidence to better clarify the contamination profiles and human health risks of OPFRs in atmospheric fine particles.
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Affiliation(s)
- Yanyan Chen
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yuanyuan Song
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yi-Jie Chen
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yanhao Zhang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Ruijin Li
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Yujie Wang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zenghua Qi
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhi-Feng Chen
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Zongwei Cai
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China.
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12
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Yin SY, Chen L, Wu DY, Wang T, Huo LJ, Zhao S, Zhou J, Zhang X, Miao YL. Tris(1,3-dichloro-2-propyl) phosphate disturbs mouse embryonic development by inducing apoptosis and abnormal DNA methylation. Environ Mol Mutagen 2019; 60:807-815. [PMID: 31411769 DOI: 10.1002/em.22322] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/15/2019] [Accepted: 08/11/2019] [Indexed: 05/21/2023]
Abstract
Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) is a kind of additive flame retardants (FRs) and was found to affect early embryonic development in zebrafish; however, there are few studies to investigate whether TDCPP will disturb the development of early mouse embryos. In our studies, we used mouse embryos as models to study the toxicology of TDCPP on the early embryos. The results showed that TDCPP disturbed the development of early mouse embryos in a dose-dependent manner. 10 μM TDCPP decreased the blastocyst formation and 100 μM TDCPP was a lethal concentration for the mouse embryos. We proved that TDCPP was detrimental to embryonic development potential by increasing the reactive oxygen species level and inducing early apoptosis. Furthermore, TDCPP changed the DNA methylation patterns of imprinted genes in treated blastocysts. The methylation of H19 and Snrpn promoter regions was increased from 37.67% to 46.00% and 31.56% to 44.38% in treated groups, respectively. In contrast, Peg3 promoter region methylation was declined from 86.55% to 73.27% in treated embryos. Taken together, our results demonstrated that TDCPP could adversely impair the early embryonic development in mouse. Environ. Mol. Mutagen. 2019. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Shu-Yuan Yin
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Li Chen
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Dan-Ya Wu
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Tao Wang
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Li-Jun Huo
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Shuhong Zhao
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Jilong Zhou
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Xia Zhang
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- National Demonstration Center for Experimental Veterinary Medicine Education, Huazhong Agricultural University, Wuhan, China
| | - Yi-Liang Miao
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, Huazhong Agricultural University, Wuhan, China
- Department of Reproductive Medical Center, Huangshi Central Hospital, Huangshi, Hubei, China
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13
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Cao Z, Chen Q, Ren M, Zhang L, Shen F, Wang X, Shi S, Zhao Y, Yan G, Peng J. Higher health risk resulted from dermal exposure to PCBs than HFRs and the influence of haze. Sci Total Environ 2019; 689:223-231. [PMID: 31271988 DOI: 10.1016/j.scitotenv.2019.06.429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 06/09/2023]
Abstract
To investigate the influence of haze on human dermal exposure to a series of halogenated flame retardants (HFRs) and polychlorinated biphenyls (PCBs), paired forehead wipes were collected from 46 volunteers (23 males, 23 females) using gauze pads soaked in isopropyl alcohol under heavy and light haze pollution levels. The median levels of ∑27HFRs and ∑27PCBs in all 92 samples were 672 and 1300ng/m2, respectively. Decabromodiphenyl ether (BDE-209) (171ng/m2) and decabromodiphenylethane (DBDPE) (134ng/m2) were the dominant components of HFRs, indicating that dermal exposure may also be the significant pathway for non-volatile compounds. PCB-37 contributed the most to ∑27PCBs, with a median concentration of 194ng/m2, followed by PCB-60 (141ng/m2). Generally, PBDE, PCB and DD (dehalogenated derivatives of DPs) levels on the foreheads of female participants (291, 1340, 0.92ng/m2) were higher (p=0.037, 0.001, and 0.031, respectively) than those of male participants (226, 989, and 0.45ng/m2). A significant difference (p=0.001) in PCBs was found between light (1690ng/m2) and heavy (996ng/m2) haze pollution conditions. Nevertheless, HFR levels under heavy (median=595ng/m2, ranging from 295 to 1490ng/m2) and light haze pollution conditions (ranging from 205 to 1220ng/m2 with a median of 689ng/m2) did not show significant differences (p=0.269). The non-carcinogenic health risk resulting from dermal exposure to ∑8HFRs and ∑27PCBs was 8.72×10-5 and 1.63×10-2, respectively, raising more concern about populations' exposure to PCBs than HFRs.
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Affiliation(s)
- Zhiguo Cao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China; Beijing Key Laboratory for Emerging Organic Contaminants Control, Tsinghua University, Beijing 100084, China.
| | - Qiaoying Chen
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Meihui Ren
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Ling Zhang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Fangfang Shen
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Xiaoying Wang
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Shiyu Shi
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Youhua Zhao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Guangxuan Yan
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Jianbiao Peng
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
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14
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Guo LC, Yu S, Wu D, Huang J, Liu T, Xiao J, Huang W, Gao Y, Li X, Zeng W, Rutherford S, Ma W, Zhang Y, Lin L. Disruption of thyroid hormone regulated proteins and gene expression by polychlorinated biphenyls, polybrominated diphenyl ethers and new flame retardants in residents of an e-waste region. Environ Pollut 2019; 254:112925. [PMID: 31454572 DOI: 10.1016/j.envpol.2019.07.093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and new flame retardants (NFRs) are known thyroid hormone (TH) disruptors, but their disrupting mechanisms in humans are not completely understood. In this study, we aimed to explore the disrupting mechanisms of the aforementioned chemicals via examining TH-regulated proteins and gene expression in human serum. Adult participants from an e-waste dismantling (exposed group) and a control region (control group) in South China provided blood samples for the research. Some compounds of PCBs, PBDEs, and NFRs showed strong binding affinity to the thyroid-stimulating hormone (TSH), thyroglobulin, thyroxine-binding globulin (TBG), gene expression of TH receptor α (TRα) and β, and iodothyronine deiodinase I (ID1). The highly exposed individuals had lower levels of TBG, TSH, and expression of TRα, but higher expression of ID1 than those of the control group. The disruption of TH-regulated proteins and gene expression suggested the exertion of different and, at times, even contradictory effects on TH disruption. However, no statistically significant difference was found in the TH levels between the exposed and the control group, implying that the TH disruption induced by these chemicals depends on the combined influence of multiple mechanisms. Gene expression appears to be an effective approach for investigations of TH disruption and the potential health effects.
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Affiliation(s)
- Ling-Chuan Guo
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Shengbing Yu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - De Wu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Jinxu Huang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Tao Liu
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Jianpeng Xiao
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China; School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Weixiong Huang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Yanhong Gao
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Xing Li
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China; School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Weilin Zeng
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | | | - Wenjun Ma
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Yonghui Zhang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China.
| | - Lifeng Lin
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
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15
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Logerová H, Tůma P, Stupák M, Pulkrábová J, Dlouhý P. Evaluation of the Burdening on the Czech Population by Brominated Flame Retardants. Int J Environ Res Public Health 2019; 16:ijerph16214105. [PMID: 31653098 PMCID: PMC6862665 DOI: 10.3390/ijerph16214105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 11/16/2022]
Abstract
The completed environmental study was concerned with assessing the exposure of the Czech population to polybrominated diphenyl ethers (PBDEs). Simultaneously, the levels of polychlorinated pollutants such as polychlorinated biphenyls (PCBs) and chlorinated diphenyl ethanes (DDTs) were also monitored. The pollutant levels were newly measured in solid fat tissue removed during plastic surgery. A total of 107 samples of fat were taken from 19–76-year-old volunteers. A total of 16 PBDE congeners were determined, of which only six occur in more than 38% of fat tissue samples. The total PBDE level attains an average value of 3.31 ng/g, which is 25% less than was measured in 2009. On the other hand, there was an increase in the levels of two PCB congeners, which was caused by an increase of the total PCB concentration from level of 625.5 ng/g, published in 2009, to the current level of 776 ng/g. The level of DDTs decreased and currently has a value of 467.4 ng/g, which is about 24% lower than in 2009. The contamination of obese middle-aged women in Czechia by more modern types of pollutants, such as PBDEs, is incomparably lower than that by PCBs and DDTs and is also decreasing in time.
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Affiliation(s)
- Hana Logerová
- Department of Hygiene, Third Faculty of Medicine, Charles University, Ruská 87, 100 00 Prague 10, Czech Republic.
- Department of Biochemistry, Cell and Molecular Biology, Third Faculty of Medicine, Charles University, Ruská 87, 100 00 Prague 10, Czech Republic.
| | - Petr Tůma
- Department of Hygiene, Third Faculty of Medicine, Charles University, Ruská 87, 100 00 Prague 10, Czech Republic.
| | - Michal Stupák
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technická 3,16628, Prague, Czech Republic.
| | - Jana Pulkrábová
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, Department of Food Analysis and Nutrition, Technická 3,16628, Prague, Czech Republic.
| | - Pavel Dlouhý
- Department of Hygiene, Third Faculty of Medicine, Charles University, Ruská 87, 100 00 Prague 10, Czech Republic.
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16
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Ait Bamai Y, Bastiaensen M, Araki A, Goudarzi H, Konno S, Ito S, Miyashita C, Yao Y, Covaci A, Kishi R. Multiple exposures to organophosphate flame retardants alter urinary oxidative stress biomarkers among children: The Hokkaido Study. Environ Int 2019; 131:105003. [PMID: 31310930 DOI: 10.1016/j.envint.2019.105003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/22/2019] [Accepted: 07/09/2019] [Indexed: 05/27/2023]
Abstract
Organophosphate flame retardants (PFRs) are used as additives in plastics and other applications such as curtains and carpets as a replacement for brominated flame retardants. As such, exposure to PFR mixtures is widespread, with children being more vulnerable than adults to associated health risks such as allergies and inflammation. Oxidative stress is thought to be able to modulate the development of childhood airway inflammation and atopic dermatitis. To evaluate these associations, the present study investigated the relationship between urinary PFR metabolites, their mixtures and urinary oxidative stress biomarkers in children as part of the Hokkaido Study on Environment and Children's Health. The levels of the oxidative stress biomarkers, such as 8-hydroxy-2'-deoxyguanosine (8-OHdG), hexanoyl-lysine (HEL), and 4-hydroxynonenal (HNE), and of 14 PFR metabolites were measured in morning spot urine samples of 7-year-old children (n = 400). Associations between PFR metabolites or PFR metabolite mixtures and oxidative stress biomarkers were examined by multiple regression analysis and weighted quantile sum regression analysis, respectively. We found that the non-chlorinated PFR metabolites, 2-ethylhexyl phenyl phosphate (EHPHP), bis(2-butoxyethyl) phosphate (BBOEP), and diphenyl phosphate (DPHP) were associated with increased levels of oxidative stress biomarkers. Furthermore, the PFR metabolite mixture was associated with increased levels of HEL and HNE, but not 8-OHdG. The combination of elevated top 2 PFR metabolites was not associated with higher urinary oxidative stress marker levels. This is the first study to report associations between urinary PFR metabolites and oxidative stress biomarkers among children.
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Affiliation(s)
- Yu Ait Bamai
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Michiel Bastiaensen
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Atsuko Araki
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
| | - Houman Goudarzi
- Hokkaido University Center for Medical Education and International Relations, Faculty of Medicine, Graduate School of Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-8638, Japan; Hokkaido University Faculty of Medicine, Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-0815, Japan
| | - Satoshi Konno
- Hokkaido University Faculty of Medicine, Graduate School of Medicine, Department of Respiratory Medicine, Kita 15, Nishi 7, Kita-ku, Sapporo 060-0815, Japan
| | - Sachiko Ito
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Chihiro Miyashita
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan
| | - Yiming Yao
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium; MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Adrian Covaci
- Toxicological Center, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Reiko Kishi
- Hokkaido University Center for Environmental and Health Sciences, Kita 12, Nishi 7, Kita-ku, Sapporo 060-0812, Japan.
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17
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Góralczyk K, Majcher A. Are the civilization diseases the result of organohalogen environmental pollution? Acta Biochim Pol 2019; 66:123-127. [PMID: 31125391 DOI: 10.18388/abp.2018_2776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/12/2019] [Indexed: 11/10/2022]
Abstract
The notion of 'civilization diseases' is used to describe certain ailments whose aetiology is difficult to explain based on the knowledge about the functioning of the body and its metabolism. Only studies at the cellular level, on biochemical changes shed light on the causes of some diseases described as civilization diseases (cancers, cardiovascular and respiratory diseases, obesity, psychomotor disorders in children and an increase in the frequency of malformations). The factors whose incontestable influence on the increase in the frequency of occurrence of various 'civilization diseases' has been proved are persistent organic pollutants, among others belonging to the group of organohalogen compounds. Among organohalogen pollutants one needs to distinguish organochlorine compounds, which have been used as pesticides, and pollution emitted by various industries such as dioxins and furans, polychlorinated biphenyls, and polybrominated organic compounds used as flame retardants and perfluoroalkylated substances, which are characterized by high chemical and thermal stability as well as high surface activity due to which they may be widely used as oleophobic and hydrophobic factors.
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Affiliation(s)
- Katarzyna Góralczyk
- Institute of Ecology and Bioethics, Uniwersytet Kardynała Stefana Wyszyńskiego, Warsaw, Poland
| | - Anna Majcher
- Institute of Ecology and Bioethics, Uniwersytet Kardynała Stefana Wyszyńskiego, Waesaw, Poland
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18
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Iszatt N, Janssen S, Lenters V, Dahl C, Stigum H, Knight R, Mandal S, Peddada S, González A, Midtvedt T, Eggesbø M. Environmental toxicants in breast milk of Norwegian mothers and gut bacteria composition and metabolites in their infants at 1 month. Microbiome 2019; 7:34. [PMID: 30813950 PMCID: PMC6393990 DOI: 10.1186/s40168-019-0645-2] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 02/03/2019] [Indexed: 05/21/2023]
Abstract
BACKGROUND Early disruption of the microbial community may influence life-long health. Environmental toxicants can contaminate breast milk and the developing infant gut microbiome is directly exposed. We investigated whether environmental toxicants in breastmilk affect the composition and function of the infant gut microbiome at 1 month. We measured environmental toxicants in breastmilk, fecal short-chain fatty acids (SCFAs), and gut microbial composition from 16S rRNA gene amplicon sequencing using samples from 267 mother-child pairs in the Norwegian Microbiota Cohort (NoMIC). We tested 28 chemical exposures: polychlorinated biphenyls (PCBs), polybrominated flame retardants (PBDEs), per- and polyfluoroalkyl substances (PFASs), and organochlorine pesticides. We assessed chemical exposure and alpha diversity/SCFAs using elastic net regression modeling and generalized linear models, adjusting for confounders, and variation in beta diversity (UniFrac), taxa abundance (ANCOM), and predicted metagenomes (PiCRUSt) in low, medium, and high exposed groups. RESULTS PBDE-28 and the surfactant perfluorooctanesulfonic acid (PFOS) were associated with less microbiome diversity. Some sub-OTUs of Lactobacillus, an important genus in early life, were lower in abundance in samples from infants with relative "high" (> 80th percentile) vs. "low" (< 20th percentile) toxicant exposure in this cohort. Moreover, breast milk toxicants were associated with microbiome functionality, explaining up to 34% of variance in acetic and propionic SCFAs, essential signaling molecules. Per one standard deviation of exposure, PBDE-28 was associated with less propionic acid (- 24% [95% CI - 35% to - 14%] relative to the mean), and PCB-209 with less acetic acid (- 15% [95% CI - 29% to - 0.4%]). Conversely, PFOA and dioxin-like PCB-167 were associated with 61% (95% CI 35% to 87%) and 22% (95% CI 8% to 35%) more propionic and acetic acid, respectively. CONCLUSIONS Environmental toxicant exposure may influence infant gut microbial function during a critical developmental window. Future studies are needed to replicate these novel findings and investigate whether this has any impact on child health.
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MESH Headings
- Adult
- Humans
- Infant, Newborn
- Bacteria/classification
- Bacteria/drug effects
- Bacteria/genetics
- Biodiversity
- Cohort Studies
- DNA, Bacterial/genetics
- DNA, Ribosomal/genetics
- Environmental Pollutants/adverse effects
- Environmental Pollutants/analysis
- Fatty Acids, Volatile/analysis
- Feces/chemistry
- Feces/microbiology
- Flame Retardants/adverse effects
- Flame Retardants/analysis
- Gastrointestinal Microbiome/drug effects
- Hydrocarbons, Chlorinated/adverse effects
- Hydrocarbons, Chlorinated/analysis
- Maternal Age
- Metabolomics
- Milk, Human/chemistry
- Norway
- Pesticides/adverse effects
- Pesticides/analysis
- Polychlorinated Biphenyls/adverse effects
- Polychlorinated Biphenyls/analysis
- RNA, Ribosomal, 16S/genetics
- Sequence Analysis, DNA/methods
- Female
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Affiliation(s)
- Nina Iszatt
- Department of Environmental Exposure and Epidemiology, Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213 Oslo, Norway
| | - Stefan Janssen
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich-Heine University Dusseldorf, Dusseldorf, Germany
| | - Virissa Lenters
- Department of Environmental Exposure and Epidemiology, Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213 Oslo, Norway
| | - Cecilie Dahl
- Department of Community Medicine and Global Health, University of Oslo, Kirkeveien 166, Fredrik Holsts hus, 0450 Oslo, Norway
| | - Hein Stigum
- Department of Non-communicable Disease, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213 Oslo, Norway
| | - Rob Knight
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
- Center for Microbiome Innovation, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
- Department of Computer Science and Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
| | - Siddhartha Mandal
- Public Health Foundation of India, Delhi NCR, Plot No. 47, Sector 44, Institutional Area Gurgaon, Gurgaon 122002, India
| | - Shyamal Peddada
- Biostatistics Branch, National Institute of Environmental Health Sciences (NIEHS), 111 T.W. Alexander Drive, Durham, NC 27709 USA
| | - Antonio González
- Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
| | - Tore Midtvedt
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Nobels väg 16, Solna Campus, Box 280, SE-171 77 Stockholm, Sweden
| | - Merete Eggesbø
- Department of Environmental Exposure and Epidemiology, Infection Control and Environmental Health, Norwegian Institute of Public Health, PO Box 222, Skøyen, 0213 Oslo, Norway
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19
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Ongono JS, Dow C, Gambaretti J, Severi G, Boutron-Ruault MC, Bonnet F, Fagherazzi G, Mancini FR. Dietary exposure to brominated flame retardants and risk of type 2 diabetes in the French E3N cohort. Environ Int 2019; 123:54-60. [PMID: 30496982 DOI: 10.1016/j.envint.2018.11.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/13/2018] [Accepted: 11/16/2018] [Indexed: 06/09/2023]
Abstract
INTRODUCTION The prevalence of type 2 diabetes (T2D) is increasing worldwide. Recent studies have suggested that environmental factors, such as exposure to brominated flame retardants (BFRs), could play a role in the epidemic of T2D. The aim of this study was to analyze the association between the dietary exposure to BFRs (Hexabromocyclododecane (HBCD) and Polybromodiphenylether (PBDE)) and T2D risk in the E3N prospective cohort of French women. RESEARCH DESIGN AND METHODS Overall, 71,415 women followed for 19 years were included in the study. We performed Cox regression models to analyze the association between dietary exposure to BFRs and T2D risk. RESULTS Overall 71,415 women were included and 3667 (5.13%) developed a T2D during follow-up. The mean dietary exposure to HBCD and to PBDE was 0.22 ng/kg body weight (BW)/day and 1.21 ng/kg bw/day, respectively. There was a positive linear association between dietary exposure to HBCD and T2D risk starting from the 2nd quintile group (HR: 1.18; 95% CI: 1.06-1.30) to the 5th quintile group (HR: 1.47; 95% CI: 1.29-1.67) when compared to the 1st quintile group. We also found positive although non-linear associations between dietary exposure to PBDE and T2D risk, with an increased HR only for the 2nd and 4th vs. 1st quintile groups (HR: 1.12; 95% CI: 1.02-1.24, and HR: 1.20; 95% CI: 1.08-1.34, respectively). CONCLUSION The findings suggest an association between dietary exposure to BFRs and T2D risk, highlighting the importance of further investigating this association the long-term health effects of endocrine disruptors in the general population. Additional studies are needed to reproduce these findings in other populations and clarify the underlying biological mechanisms.
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Affiliation(s)
- Jeanne Sandrine Ongono
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Courtney Dow
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Juliette Gambaretti
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Gianluca Severi
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Marie-Christine Boutron-Ruault
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Fabrice Bonnet
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; CHU Rennes, Université de Rennes 1, Department of Endocrinology, Diabetology and Nutrition, Rennes, France
| | - Guy Fagherazzi
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France
| | - Francesca Romana Mancini
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris-Saclay, 94805, Villejuif, France; Gustave Roussy, F-94805, Villejuif, France.
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20
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Wang Y, Zhang M, Zhao L, Zhang W, Zhao T, Chu J, Qiu Y, Gong H, Li R. Effects of tetrabromobisphenol A on maize (Zea mays L.) physiological indexes, soil enzyme activity, and soil microbial biomass. Ecotoxicology 2019; 28:1-12. [PMID: 30460434 DOI: 10.1007/s10646-018-1987-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/15/2018] [Indexed: 06/09/2023]
Abstract
TetrabromobisphenolA (TBBPA) is the most widely used brominated flame retardant, and it has the characteristics of persistent organic pollutants (POPs), attracting considerable attention. Many studies mainly focus on TBBPA toxicological effects in aquatic animals and rodents, but the ecotoxicology data of TBBPA on plant-soil system are limited so far. In this study, we assessed the impacts of TBBPA on maize (Zea mays L.) physiological indexes, soil enzyme activity, and soil microbial biomass at different concentrations of TBBPA (0, 0.75, 3.75, 7.5, 15, 37.5 and 75 mg·kg-1) and explored their relationships. Results showed that the maize physiological indexes and chlorophyll contents were significantly decreased by TBBPA, the activities of anti-oxidative enzymes including catalase (CAT), peroxidase (POD) and polyphenol oxidase (PPO) and the contents of malondialdehyde (MDA) were remarkably enhanced. Meanwhile, TBBPA activated the CAT, POD and PPO activities in soil. The low concentrations TBBPA promoted the activities of soil urease (S-UE), neutral phosphatase (S-PE) and increased the soil microbial biomass carbon (SMBC) and nitrogen (SMBN) while the high concentrations TBBPA suppressed them. Notably, the data indicated microbial biomass had respectively a significant correlation with CAT, PPO and S-UE in soil in the presence of TBBPA, and maize chlorophyll contents were associated with SMBN, CAT, and PPO. Taken together, TBBPA caused soil pollution, affected soil enzyme activities and microbial biomass, and hindered maize growth under the current experimental condition, suggesting the interactions among maize growth, soil enzyme, soil microorganism in maize rhizosphere of TBBPA-polluted soils are very important aspects to comprehensively evaluate the ecotoxicological effects of TBBPA.
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Affiliation(s)
- Ying Wang
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Mei Zhang
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Lifang Zhao
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Wei Zhang
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Ting Zhao
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Jingxuan Chu
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Yanhao Qiu
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Hangyuan Gong
- Institute of Environmental Science, Shanxi University, Taiyuan, China
| | - Ruijin Li
- Institute of Environmental Science, Shanxi University, Taiyuan, China.
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21
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Chen X, Zhu Y, Huang Q, Liu J, Liu B, Zhang Y. Distributions, influencing factors, and risk assessment of Dechlorane Plus and related compounds in surficial water and sediment from the Jiulong River Estuary, Southeast China. Environ Sci Pollut Res Int 2018; 25:30292-30300. [PMID: 30159835 DOI: 10.1007/s11356-018-2874-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Dechloranes, a type of additive polychlorinated flame retardant, which include Dechlorane (Dec) Plus (DP), Dec 602, Dec 603, and Dec 604, were detected in surficial water and sediment from the Jiulong River Estuary (JRE). The total concentration of dechloranes in the water and sediments ranged from 1.4 to 4.1 ng/L and 9.3 to 36.2 ng/g dry weight, respectively. The distribution patterns of dechloranes in the water and sediments were both dominated by DP. The average values of the anti-DP fractional abundances (fanti) in the water and sediment samples both were fell in the range of commercial DP mixtures. The relationships of DP in the water with suspended particulate matter (SPM), total organic carbon (TOC), and tides indicated that the combined actions of these environmental factors influenced the distribution of DP in the JRE. The deleterious risk associated with exposure to dechloranes via the water for adults was very low, suggesting that exposure of the local population of dechloranes via water is relatively safe in the JRE.
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Affiliation(s)
- Xiangping Chen
- State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, 361102, Xiamen, Fujian Province, People's Republic of China
| | - Yaxian Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, People's Republic of China
| | - Qi Huang
- State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, 361102, Xiamen, Fujian Province, People's Republic of China
| | - Jun Liu
- Wenzhou Entry Exit Inspection and Quarantine Bureau, Wenzhou, 325027, People's Republic of China
| | - Bin Liu
- Wenzhou Entry Exit Inspection and Quarantine Bureau, Wenzhou, 325027, People's Republic of China
| | - Yong Zhang
- State Key Laboratory of Marine Environmental Science of China (Xiamen University), College of the Environment and Ecology, Xiamen University, 361102, Xiamen, Fujian Province, People's Republic of China.
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22
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Guo LC, Xiao J, Zhang Y, Yu S, Lin H, Su G, Liu T, Li X, Lv S, Rutherford S, Ma W. Association between serum polybrominated diphenyl ethers, new flame retardants and thyroid hormone levels for school students near a petrochemical complex, South China. Chemosphere 2018; 202:476-482. [PMID: 29579682 DOI: 10.1016/j.chemosphere.2018.03.120] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 02/25/2018] [Accepted: 03/18/2018] [Indexed: 06/08/2023]
Abstract
As surrogates of polybrominated diphenyl ethers (PBDEs), new flame retardants (NFRs) include a series of chlorinated and brominated flame retardants. Though the NFRs are thought to induce similar thyroid hormone (TH) disrupting effects as PBDEs, few studies have focused on them. Given the increasing levels of NFRs in the environment, more in depth investigation of the potential TH disrupting effects of NFRs is warranted. This research involved a health survey to collect data and examine the associations between PBDEs, NFRs and TH. 174 school students lived near a petrochemical complex in South China participated in the survey, completing questionnaires and providing blood samples. Thirteen congeners of PBDEs, eight species of NFRs, TH and thyroid-stimulating hormone (TSH) were measured. The median levels of ΣPBDE (sum of thirteen congeners of PBDEs) and ΣNFR (sum of eight species of NFRs) for students were 140 and 240 ng g-1 lipid, respectively. Nonmonotonic relationships were observed between quartile levels of PBDEs, NFRs and corresponding TH. In contrast to ΣPBDE that was positively associated with triidothyrine (T3) level, ΣNFR was not statistically associated with TH. ΣPBDE + NFR (sum of thirteen congeners of PBDEs and eight species of NFRs) was significantly associated with T3 level.
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Affiliation(s)
- Ling-Chuan Guo
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Jianpeng Xiao
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China; School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Yonghui Zhang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China.
| | - Shengbing Yu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Hualiang Lin
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Guangning Su
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Tao Liu
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China
| | - Xing Li
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China; School of Public Health, Southern Medical University, Guangzhou 510515, China
| | - Shaomin Lv
- Guangzhou Blood Center, Guangzhou 510095, China
| | - Shannon Rutherford
- Centre for Environment and Population Health, School of Medicine, Griffith University, Brisbane QLD 4111, Australia
| | - Wenjun Ma
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou 511430, China.
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23
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Čechová E, Vojta Š, Kukučka P, Kočan A, Trnovec T, Murínová ĽP, de Cock M, van de Bor M, Askevold J, Eggesbø M, Scheringer M. Legacy and alternative halogenated flame retardants in human milk in Europe: Implications for children's health. Environ Int 2017; 108:137-145. [PMID: 28843142 DOI: 10.1016/j.envint.2017.08.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 08/10/2017] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Abstract
In this study, 10 polybrominated diphenyl ethers (PBDEs) and 19 alternative halogenated flame retardants (AFRs) were determined in >450 human milk samples across three European countries, representing northern, western and eastern Europe. This study provides first insights into the occurrence of selected AFRs in mother milk samples and compares them among three European countries. Sums of median concentrations of the most frequently detected PBDEs were 2.16, 0.88 and 0.45ngg-1 lipid weight (lw) in Norway, the Netherlands and Slovakia, respectively. The sum of the concentrations of AFRs ranged from 0.14 to 0.25ngg-1lw in all countries, which was 2 to 15 times less compared to Σ7PBDEs. The Penta-BDE replacement, bis(2-ethylhexyl) tetrabromophthalate, BEH-TEBP, was present at the greatest concentrations of any of the AFRs and in some samples exceeded concentrations of BDE 47 and BDE 153. Four AFRs including bromobenzenes (hexabromobenzene, pentabromobenzene, pentabromotoluene) and another Penta-BDE replacement (2-ethylhexyl-2,3,4,5-tetrabromobenzoate, EH-TBB) were detected in >42% of all human milk samples. Because of the potential developmental neurotoxicity of the halogenated flame retardants, infant dietary intakes via breastfeeding were estimated; in four cases the intakes of BDE 47 exceeded the reference dose indicating that the present concentrations may pose a risk for children.
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Affiliation(s)
- Eliška Čechová
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Šimon Vojta
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Petr Kukučka
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Anton Kočan
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic
| | - Tomáš Trnovec
- Department of Environmental Medicine, Slovak Medical University, Limbová 12, 83303 Bratislava, Slovakia
| | | | - Marijke de Cock
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Margot van de Bor
- Department of Environment and Health, Vrije Universiteit, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Joakim Askevold
- Norwegian Institute of Public Health, Lovisenberggata 8, 0403 Oslo, Norway
| | - Merete Eggesbø
- Norwegian Institute of Public Health, Lovisenberggata 8, 0403 Oslo, Norway
| | - Martin Scheringer
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic; Institute for Chemical and Bioengineering, ETH Zürich, Vladimir-Prelog-Weg 1, CH-8093 Zürich, Switzerland.
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24
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Affiliation(s)
- Bilal B Mughal
- CNRS/UMR7221, Muséum National d'Histoire Naturelle/Université Paris-Sorbonne, 7 rue Cuvier, 75005 Paris, France
| | - Barbara A Demeneix
- CNRS/UMR7221, Muséum National d'Histoire Naturelle/Université Paris-Sorbonne, 7 rue Cuvier, 75005 Paris, France
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25
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Ding JJ, Yang FX. [Progress in environmental exposure of organophosphate flame retardants]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 51:570-576. [PMID: 28592106 DOI: 10.3760/cma.j.issn.0253-9624.2017.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Organophosphate flame retardants (OPFRs), which have both great properties of flame retardation and plasticization, are currently widely used as additive flame retardants. Due to the restriction and phase-out of brominated flame retardants (BFRs), the market demand for OPFRs as excellent alternatives of BFRs has been rapid increasing. OPFRs can be slowly released into the environment during production and application. Some OPFRs might be persistent in the environment. As a result, OPFRs have been detected in various matrices in the environment and are expected to accumulate in human body through various pathways. OPFRs may cause adverse effects to human health as some of them have been identified as neurotoxicants, reproductive toxicants and potential carcinogens. The article summarized the occurrence and patterns of OPFRs in various environmental matrices such as air, dust, water, food and so on, and in human specimens, estimates the exposure status through different pathways and body burdens of OPFRs. The expected hotspots of OPFRs were also discussed in the future.
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Affiliation(s)
- J J Ding
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
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26
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Goodyer CG, Poon S, Aleksa K, Hou L, Atehortua V, Carnevale A, Koren G, Jednak R, Emil S, Bagli D, Dave S, Hales BF, Chevrier J. A Case-Control Study of Maternal Polybrominated Diphenyl Ether (PBDE) Exposure and Cryptorchidism in Canadian Populations. Environ Health Perspect 2017; 125:057004. [PMID: 28557710 PMCID: PMC5726354 DOI: 10.1289/ehp522] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 09/22/2016] [Accepted: 10/08/2016] [Indexed: 05/05/2023]
Abstract
BACKGROUND Polybrominated diphenyl ethers (PBDEs) are flame retardants found in North American household products during the past four decades. These chemicals leach out in dust as products age, exposing individuals daily through inhalation and ingestion. Animal studies suggest that PBDEs disrupt sex hormones and adversely affect development of the reproductive system. OBJECTIVES In the present study, we examined whether there is a link between maternal hair PBDE concentrations and the risk of cryptorchidism (undescended testes) in male infants; testis descent is known to be dependent on androgens. METHODS Full-term male infants were recruited through clinics in Montreal, Toronto, and London, Canada. Boys with cryptorchidism at 3-18 months of age (n=137) were identified by pediatric urologists and surgeons; similar-aged controls (n=158) had no genitourinary abnormalities as assessed by pediatricians. Eight BDE congeners (BDE-28, -47, -99, -100, -153, -154, -183, -209) were measured by GC-MS (gas chromatography-mass spectrometry) in maternal hair samples collected at the time of recruitment. RESULTS The ∑PBDE geometric mean for maternal hair was 45.35 pg/mg for controls and 50.27 pg/mg for cases; the concentrations of three BDEs (BDE-99, -100, and -154) were significantly higher in cases than controls in unadjusted models. In adjusted models, every 10-fold increase in the concentration of maternal hair BDE-99 [OR=2.53 (95% CI: 1.29, 4.95) or BDE-100 [OR=2.45 (95% CI: 1.31, 4.56)] was associated with more than a doubling in the risk of cryptorchidism. BDE-154 [OR=1.88 (95% CI: 1.08, 3.28) was also significant. CONCLUSIONS Our results suggest that maternal exposure to BDE-99, -100, and -154 may be associated with abnormal migration of testes in the male fetus. This may be due to the anti-androgenic properties of the PBDEs. https://doi.org/10.1289/EHP522.
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Affiliation(s)
- Cynthia G Goodyer
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada
| | - Shirley Poon
- Department of Pharmacology and Toxicology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Katarina Aleksa
- Department of Pharmacology and Toxicology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
- Leslie Dan School of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - Laura Hou
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
| | - Veronica Atehortua
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
| | - Amanda Carnevale
- Department of Pharmacology and Toxicology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Roman Jednak
- Department of Pediatric Urology, McGill University, Montreal, Quebec, Canada
| | - Sherif Emil
- Department of Pediatric General and Thoracic Surgery, McGill University, Montreal, Quebec, Canada
| | - Darius Bagli
- Department of Pediatric Urology, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Sumit Dave
- Division of Pediatric Urology, London Health Sciences Centre, London, Ontario, Canada
| | - Barbara F Hales
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Jonathan Chevrier
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
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Lipscomb ST, McClelland MM, MacDonald M, Cardenas A, Anderson KA, Kile ML. Cross-sectional study of social behaviors in preschool children and exposure to flame retardants. Environ Health 2017; 16:23. [PMID: 28274271 PMCID: PMC5343384 DOI: 10.1186/s12940-017-0224-6] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 02/22/2017] [Indexed: 05/18/2023]
Abstract
BACKGROUND Children are exposed to flame retardants from the built environment. Brominated diphenyl ethers (BDE) and organophosphate-based flame retardants (OPFRs) are associated with poorer neurocognitive functioning in children. Less is known, however, about the association between these classes of compounds and children's emotional and social behaviors. The objective of this study was to determine if flame retardant exposure was associated with measurable differences in social behaviors among children ages 3-5 years. METHODS We examined teacher-rated social behaviors measured using the Social Skills Improvement Rating Scale (SSIS) and personal exposure to flame retardants in children aged 3-5 years who attended preschool (n = 72). Silicone passive samplers worn for 7 days were used to assess personal exposure to 41 compounds using gas chromatography-mass spectrophotometer. These concentrations were then summed into total BDE and total OPFR exposure prior to natural log transformation. Separate generalized additive models were used to evaluate the relationship between seven subscales of the SSIS and lnΣBDE or lnΣOPFR adjusting for other age, sex, adverse social experiences, and family context. RESULTS All children were exposed to a mixture of flame retardant compounds. We observed a dose dependent relationship between lnΣOPFR and two subscales where children with higher exposures were rated by their preschool teachers as having less responsible behavior (p = 0.07) and more externalizing behavior problems (p = 0.03). Additionally, children with higher lnΣBDE exposure were rated by teachers as less assertive (p = 0.007). CONCLUSIONS We observed a cross-sectional association between children's exposure to flame retardant compounds and teacher-rated social behaviors among preschool-aged children. Children with higher flame retardant exposures exhibited poorer social skills in three domains that play an important role in a child's ability to succeed academically and socially.
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Affiliation(s)
| | - Megan M. McClelland
- College of Public Health and Human Sciences, Oregon State University, 15 Milam Hall, Corvallis, OR 97331 USA
| | - Megan MacDonald
- College of Public Health and Human Sciences, Oregon State University, 15 Milam Hall, Corvallis, OR 97331 USA
| | | | - Kim A. Anderson
- Oregon State University, College of Agricultural Sciences, Corvallis, OR USA
| | - Molly L. Kile
- College of Public Health and Human Sciences, Oregon State University, 15 Milam Hall, Corvallis, OR 97331 USA
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28
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Zhang X, Zou W, Mu L, Chen Y, Ren C, Hu X, Zhou Q. Rice ingestion is a major pathway for human exposure to organophosphate flame retardants (OPFRs) in China. J Hazard Mater 2016; 318:686-693. [PMID: 27484948 DOI: 10.1016/j.jhazmat.2016.07.055] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/25/2016] [Accepted: 07/22/2016] [Indexed: 05/25/2023]
Abstract
Although organophosphate flame retardants (OPFRs) have been shown to accumulate in abiotic and biotic environmental compartments, data about OPFRs concentrations in various foods are limited and are none in humans through diets. In this work, the concentrations of 6 typical OPFRs were investigated in 50 rice samples, 75 commonly consumed foods and 45 human hair samples from China. The dietary intakes of OPFRs for adult people via food ingestion were estimated. The concentrations of ΣOPFRs in foods ranged from 0.004ng/g to 287ng/g. OPFRs were detected in 53.3% of the human hair samples. The highest OPFRs concentrations were found in rice and vegetables. Tri(2-chloroethyl)phosphate(TCEP), tris(2-chloroisopropyl)phosphate(TCIPP), and tri(2-ethyltexyl)phosphate(TEHP) were predominant in all food samples. OPFRs concentrations in foods were not significantly affected by the packaging materials. The mean dietary intakes of ΣOPFRs for adult males and females were 539 and 601ng/kg body weight/day, respectively. The greatest contribution to these values is from rice, accounting for approximately 60% of the total intake, particularly from rice protein. Rice ingestion was considered a potential major pathway for human exposure to OPFRs, and regional differences in the levels of OPFRs in foods and dietary differences should be given more attention in the future.
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Affiliation(s)
- Xingli Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Wei Zou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Li Mu
- Institute of Agro-environmental Protection, Ministry of Agriculture, Tianjin 300191, China
| | - Yuming Chen
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Chaoxiu Ren
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
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Marshall A, Waller L, Lekberg Y. Cascading effects of fire retardant on plant-microbe interactions, community composition, and invasion. Ecol Appl 2016; 26:996-1002. [PMID: 27509743 DOI: 10.1890/16-0001.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Climate change, historical fire suppression, and a rise in human movements in urban-forest boundaries have resulted in an increased use of long-term fire retardant (LTFR). While LTFR is an effective fire-fighting tool, it contains high concentrations of nitrogen and phosphorus, and little is known about how this nutrient pulse affects terrestrial ecosystems. We used field surveys and greenhouse experiments to quantify effects of LTFR on plant productivity, community composition, and plant interactions with the ubiquitous root symbiont arbuscular mycorrhizal fungi (AMF). In the field, LTFR applications were associated with persistent shifts in plant communities toward exotic annuals with little or no dependency of AMF. Plants exposed to LTFR were less colonized by AMF, both in field surveys and in the greenhouse, and this was most likely due to the substantial and persistent increase in soil available phosphorus. All plants grew bigger with LTFR in the greenhouse, but the invasive annual cheatgrass (Bromus tectorum) benefitted most. While LTFR can control fires, it may cause long-term changes in soil nutrient availabilities, disrupt plant interactions with beneficial soil microbes, and exasperate invasion by some exotic plants.
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30
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Affiliation(s)
- Angela M. Leung
- Division of Endocrinology, UCLA David Geffen School of Medicine, Los Angeles, California
- Division of Endocrinology, VA Greater Los Angeles Healthcare System, Los Angeles, California
| | - Tim I.M. Korevaar
- The Generation R Study Group; Department of Internal Medicine; Rotterdam Thyroid Center; Erasmus Medical Center, Rotterdam, the Netherlands
| | - Robin P. Peeters
- The Generation R Study Group; Department of Internal Medicine; Rotterdam Thyroid Center; Erasmus Medical Center, Rotterdam, the Netherlands
| | - R. Thomas Zoeller
- Biology Department and Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, Massachusetts
| | - Josef Köhrle
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - Gregory A. Brent
- Division of Endocrinology, UCLA David Geffen School of Medicine, Los Angeles, California
- Division of Endocrinology, VA Greater Los Angeles Healthcare System, Los Angeles, California
| | - Barbara A. Demeneix
- Evolution des Régulations Endocriniennes, Département Régulations, Développement et Diversité Moléculaire, Muséum National d'Histoire Naturelle, Paris, France
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31
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Toms LML, Mazaheri M, Brommer S, Clifford S, Drage D, Mueller JF, Thai P, Harrad S, Morawska L, Harden FA. Polybrominated diphenyl ethers (PBDEs) in dust from primary schools in South East Queensland, Australia. Environ Res 2015; 142:135-40. [PMID: 26142718 DOI: 10.1016/j.envres.2015.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 06/02/2015] [Accepted: 06/03/2015] [Indexed: 05/17/2023]
Abstract
PBDE concentrations are higher in children compared to adults with exposure suggested to include dust ingestion. Besides the home environment, children spend a great deal of time in school classrooms which may be a source of exposure. As part of the "Ultrafine Particles from Traffic Emissions and Children's Health (UPTECH)" project, dust samples (n=28) were obtained in 2011/12 from 10 Brisbane, Australia metropolitan schools and analysed using GC and LC-MS for polybrominated diphenyl ethers (PBDEs) -17, -28, -47, -49, -66, -85, -99, -100, -154, -183, and -209. Σ11PBDEs ranged from 11-2163 ng/g dust; with a mean and median of 600 and 469 ng/g dust, respectively. BDE-209 (range n.d. -2034 ng/g dust; mean (median) 402 (217)ng/g dust) was the dominant congener in most classrooms. Frequencies of detection were 96%, 96%, 39% and 93% for BDE-47, -99, -100 and -209, respectively. No seasonal variations were apparent and from each of the two schools where XRF measurements were carried out, only two classroom items had detectable bromine. PBDE intake for 8-11 year olds can be estimated at 0.094 ng/day BDE-47; 0.187 ng/day BDE-99 and 0.522ng/day BDE-209 as a result of ingestion of classroom dust, based on mean PBDE concentrations. The 97.5% percentile intake is estimated to be 0.62, 1.03 and 2.14 ng/day for BDEs-47, -99 and -209, respectively. These PBDE concentrations in dust from classrooms, which are higher than in Australian homes, may explain some of the higher body burden of PBDEs in children compared to adults when taking into consideration age-dependant behaviours which increase dust ingestion.
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Affiliation(s)
- Leisa-Maree L Toms
- School of Public Health and Social Work and Institute of Health and Biomedical Innovation, Faculty of Health, Queensland University of Technology, Brisbane, Australia.
| | - Mandana Mazaheri
- International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia
| | - Sandra Brommer
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Samuel Clifford
- International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia; Centre for Air Quality and Health Research and Evaluation, 431 Glebe Point Road, Glebe, Australia
| | - Daniel Drage
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jochen F Mueller
- The University of Queensland, National Research Centre for Environmental Toxicology, Brisbane, Australia
| | - Phong Thai
- The University of Queensland, National Research Centre for Environmental Toxicology, Brisbane, Australia
| | - Stuart Harrad
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Lidia Morawska
- International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, Australia
| | - Fiona A Harden
- School of Clinical Sciences and Institute of Health and Biomedical Innovation, Faculty of Health, Queensland University of Technology, Brisbane, Australia
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32
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Ding G, Yu J, Cui C, Chen L, Gao Y, Wang C, Zhou Y, Tian Y. Association between prenatal exposure to polybrominated diphenyl ethers and young children's neurodevelopment in China. Environ Res 2015; 142:104-111. [PMID: 26133807 DOI: 10.1016/j.envres.2015.06.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/04/2015] [Accepted: 06/06/2015] [Indexed: 06/04/2023]
Abstract
The use of polybrominated diphenyl ethers (PBDEs) has been dramatically increasing over the last two decades in China. Animal studies suggest that prenatal exposure to PBDEs may result in neurodevelopmental deficits. Two hundred thirty-two participating mothers were recruited from a prospective birth cohort in rural northern China between September 2010 and February 2012. We analyzed 232 cord blood specimens for selected PBDE congeners and examined their association with children's developmental quotients (DQs) at 12 (n=192) and 24 (n=149) months of age based on the Gesell Developmental Schedules (motor, adaptive, language, and social domains). There were no substantial differences by demographic characteristics among the three time points: baseline, 12 and 24 months of age. Median cord blood levels of PBDE congeners 47, 99, 100, and 153 were 3.71, 6.70, 2.63, and 2.19 ng/g lipid, respectively. At 12 months of age, neither the individual nor total (the sum of BDEs 47, 99, 100, and 153) congener levels were associated with any of the four domain DQs. However, at 24 months of age, a 10-fold increase in BDE-99 levels was associated with a 2.16-point decrease [95% confidence interval (CI): -4.52, -0.20] in language domain DQs and a 10-fold increase in BDE-47 levels was associated with a 1.89-point decrease (95% CI: -3.75, -0.03) in social domain DQs. Prenatal exposure to PBDEs was associated with lower DQs in young children. The results contribute to the growing evidence that PBDEs could act as developmental neurotoxicants,and the findings have implications for children's environmental health in China.
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Affiliation(s)
- Guodong Ding
- MOE and Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Pediatrics, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jing Yu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Chang Cui
- Research Base of Key Laboratory of Surveillance and Early-warning on Infectious Disease in China CDC, Shanghai Pudong New Area Center for Disease Control and Prevention, Shanghai, China
| | - Limei Chen
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yu Gao
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Caifeng Wang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yijun Zhou
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Tian
- MOE and Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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33
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Lopez-Espinosa MJ, Costa O, Vizcaino E, Murcia M, Fernandez-Somoano A, Iñiguez C, Llop S, Grimalt JO, Ballester F, Tardon A. Prenatal Exposure to Polybrominated Flame Retardants and Fetal Growth in the INMA Cohort (Spain). Environ Sci Technol 2015; 49:10108-16. [PMID: 26181825 PMCID: PMC4573079 DOI: 10.1021/acs.est.5b01793] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 07/10/2015] [Accepted: 07/16/2015] [Indexed: 05/22/2023]
Abstract
Our aim was to investigate the relation between PBDEs and fetal growth or newborn anthropometry in a Spanish cohort (2003-2008). PBDE congeners (BDE-47, -99, -153, -154, and -209) were determined in serum of 670 mothers at gestational week 12 and in 534 umbilical cord samples. Abdominal circumference (AC), estimated fetal weight (EFW), femur length (FL), and biparietal diameter (BPD) during gestation were measured by ultrasounds. At birth, weight (BW), head circumference (HC), and length (BL) were also measured. We assessed growth in the intervals between 12-20 and 20-34 weeks of gestation and size at birth by standard deviation (SD)-scores adjusted for constitutional characteristics. We conducted multivariate linear regression analyses between PBDE congeners and their sum (ΣPBDEs) and outcomes. We found statistically significant inverse associations between ΣPBDEs and AC, EFW, and BPD at weeks 20-34 and HC at birth. Regarding congeners, the association was clearer with BDE-99, with inverse associations being found with AC, EFW, and BPD at weeks 20-34, and with BW and HC at delivery. These outcomes decreased between 1.3% and 3.5% for each 2-fold PBDE increase. Concerning matrices, we found statistically significant inverse associations with BPD, HC, and BW when using maternal serum, and for AC and EFW with cord serum. In conclusion, PBDEs may impair fetal growth in late pregnancy and reduce birth size.
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Affiliation(s)
- Maria-Jose Lopez-Espinosa
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
- Phone: (+34) 96 1925941; e-mail: ; mail: Foundation for
the Promotion of Health and Biomedical Research in the Valencian Region,
FISABIO-Public Health, Avda Catalunya 21, 46020 Valencia, Spain
| | - Olga Costa
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
| | - Esther Vizcaino
- Department
of Preventive Medicine and Public Health, University of Oviedo, Campus del Cristo s/n, 33006 Oviedo, Asturias, Spain
- Department
of Environmental Chemistry, Institute of
Environmental Assessment and Water Research (IDÆA-CSIC), Jordi Girona, 18, 08034 Barcelona, Spain
| | - Mario Murcia
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Ana Fernandez-Somoano
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
- Department
of Preventive Medicine and Public Health, University of Oviedo, Campus del Cristo s/n, 33006 Oviedo, Asturias, Spain
| | - Carmen Iñiguez
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Sabrina Llop
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Joan O. Grimalt
- Department
of Environmental Chemistry, Institute of
Environmental Assessment and Water Research (IDÆA-CSIC), Jordi Girona, 18, 08034 Barcelona, Spain
| | - Ferran Ballester
- FISABIO−Universitat
Jaume I−Universitat de València Joint Research Unit
of Epidemiology and Environmental Health, Avenida de Catalunya 21, 46020 Valencia, Spain
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - Adonina Tardon
- Spanish
Consortium for Research on Epidemiology and Public Health (CIBERESP), Calle Monforte de Lemos 3-5, 28029 Madrid, Spain
- Department
of Preventive Medicine and Public Health, University of Oviedo, Campus del Cristo s/n, 33006 Oviedo, Asturias, Spain
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Shi YJ, Xu XB, Zheng XQ, Lu YL. Responses of growth inhibition and antioxidant gene expression in earthworms (Eisenia fetida) exposed to tetrabromobisphenol A, hexabromocyclododecane and decabromodiphenyl ether. Comp Biochem Physiol C Toxicol Pharmacol 2015; 174-175:32-8. [PMID: 26117064 DOI: 10.1016/j.cbpc.2015.06.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 06/16/2015] [Accepted: 06/17/2015] [Indexed: 11/15/2022]
Abstract
Tetrabromobisphenol A (TBBPA), hexabromocyclododecane (HBCD) and decabromodiphenyl ether (BDE 209), suspected ubiquitous contaminants, account for the largest volume of brominated flame retardants (BFRs) since penta-BDE and octa-BDE have been phased out globally. In this paper, the growth inhibition and gene transcript levels of antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT)) and the stress-response gene involved in the prevention of oxidative stress (Hsp70) of earthworms (Eisenia fetida) exposed to TBBPA, HBCD and BDE 209 were measured to identify the toxicity effects of selected BFRs on earthworms. The growth of earthworms treated by TBBPA at 200 and 400 mg/kg dw were inhibited at rate of 13.7% and 22.0% respectively, while there was no significant growth inhibition by HBCD and BDE 209. A significant (P<0.01) up-regulation of SOD expression level was observed in earthworms exposed to TBBPA at 50 mg/kg dw (1.77-fold) and to HBCD at 400 mg/kg dw (2.06-fold). The transcript level of Hsp70 gene was significantly up-regulated (P<0.01) when earthworms exposed to TBBPA at concentration of 50-200 mg/kg (2.16-2.19-fold) and HBCD at 400 mg/kg (2.61-fold). No significant variation of CAT gene expression in all the BFRs treatments was observed, neither does all the target gene expression level exposed to BDE 209. Assessed by growth inhibition and the changes at mRNA levels of encoding genes in earthworms, TBBPA showed the greatest toxicity, followed by HBCD and BDE 209, consistent with trends in molecular properties. The results help to understand the molecular mechanism of antioxidant defense.
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Affiliation(s)
- Ya-juan Shi
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xiang-bo Xu
- Beijing Municipal Environmental Monitoring Center, Beijing 100048, China
| | - Xiao-qi Zheng
- National Center for Climate Change Strategy and International Cooperation, Beijing 100038, China
| | - Yong-long Lu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Feng Y, Hu Q, Meng G, Wu X, Zeng W, Zhang X, Yu Y, Wang Y. Simulating long-term occupational exposure to decabrominated diphenyl ether using C57BL/6 mice: biodistribution and pathology. Chemosphere 2015; 128:118-124. [PMID: 25687576 DOI: 10.1016/j.chemosphere.2015.01.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 12/30/2014] [Accepted: 01/07/2015] [Indexed: 06/04/2023]
Abstract
Decabrominated biphenyl ether (BDE-209) is a fully brominated diphenyl ether compound used widely as an additive brominated flame retardant in a variety of consumer products. In recent years, BDE-209 has been reported to be abundant and persistent in the environment, and comparatively high burdens have been found in occupational environmental compartments and exposed individuals. In the present study, an animal model for simulating long-term occupational exposure to BDE-209 was set up. Female C57BL/6 mice (n=10) were intragastrically administered BDE-209 at a dose of 800 mg kg(-1) bw at 2-d intervals for 2 years with an internal blood level of approximately 200 ng mL(-1), which was comparable to the high level of BDE-209 detected in the occupational population, and the biodistribution and biological effects were evaluated systematically. The results showed that large amounts of the chemical accumulated in most tissues, and the preferential organs were the ovary and uterus, liver and lung. Decreased survival was observed in the exposed mice. The subsequent pathological analysis revealed hepatomegaly in the exposed mice, accompanied by obvious histopathological changes in the liver, lung, brain, spleen, kidney and ovary. No neoplastic lesions were observed in this lifetime exposure study. Although the number of experimental mice was limited, our observations offer a comprehensive understanding of the chronic toxicology of BDE-209 after continuous high-dose exposure.
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Affiliation(s)
- Yan Feng
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Qingliang Hu
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Ge Meng
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Xiaomeng Wu
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Weihong Zeng
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Xing Zhang
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China
| | - Yingxin Yu
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Yan Wang
- Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, PR China.
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Jarque S, Piña B. Deiodinases and thyroid metabolism disruption in teleost fish. Environ Res 2014; 135:361-375. [PMID: 25462686 DOI: 10.1016/j.envres.2014.09.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 09/09/2014] [Accepted: 09/26/2014] [Indexed: 06/04/2023]
Abstract
Many xenobiotic compounds with endocrine disrupting activity have been described since the late eighties. These compounds are able to interact with natural hormone systems and potentially induce deleterious effects in wildlife, notably piscine species. However, while the characterization of endocrine disruptors with "dioxin-like", estrogenic or androgenic activities is relatively well established, little is known about environmentally relevant pollutants that may act at thyroid system level. Iodothyronine deiodinases, the key enzymes in the activation and inactivation of thyroid hormones, have been suggested as suitable biomarkers for thyroid metabolism disruption. The present article reviews the biotic and abiotic factors that are able to modulate deiodinases in teleosts, a representative model organism for vertebrates. Data show that deiodinases are highly sensitive to several physiological and physical variables, so they should be taken into account to establish natural basal deiodination patterns to further understand responses under chemical exposure. Among xenobiotic compounds, brominated flame retardants are postulated as chemicals of major concern because of their similar structure shared with thyroid hormones. More ambiguous results are shown for the rest of compounds, i.e. polychlorinated biphenyls, perfluorinated chemicals, pesticides, metals and synthetic drugs, in part due to the limited information available. The different mechanisms of action still remain unknown for most of those compounds, although several hypothesis based on observed effects are discussed. Future tasks are also suggested with the aim of moving forward in the full characterization of chemical compounds with thyroid disrupting activity.
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Affiliation(s)
- Sergio Jarque
- Masaryk University, Faculty of Science, RECETOX, Kamenice 5/753, CZ62500 Brno, Czech Republic.
| | - Benjamin Piña
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Jordi Girona, 18, 08034 Barcelona, Spain.
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Araki A, Saito I, Kanazawa A, Morimoto K, Nakayama K, Shibata E, Tanaka M, Takigawa T, Yoshimura T, Chikara H, Saijo Y, Kishi R. Phosphorus flame retardants in indoor dust and their relation to asthma and allergies of inhabitants. Indoor Air 2014; 24:3-15. [PMID: 23724807 DOI: 10.1111/ina.12054] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Accepted: 05/26/2013] [Indexed: 06/02/2023]
Abstract
Organophosphate esters are used as additives in flame retardants and plasticizers, and they are ubiquitous in the indoor environment. Phosphorus flame retardants (PFRs) are present in residential dust, but few epidemiological studies have assessed their impact on human health. We measured the levels of 11 PFRs in indoor floor dust and multi-surface dust in 182 single-family dwellings in Japan. We evaluated their correlations with asthma and allergies of the inhabitants. Tris(2-butoxyethyl) phosphate was detected in all samples (median value: 580 μg/g in floor dust, 111 μg/g in multi-surface dust). Tris(2-chloro-iso-propyl) phosphate (TCIPP) was detected at 8.69 μg/g in floor dust and 25.8 μg/g in multi-surface dust. After adjustment for potential confounders, significant associations were found between the prevalence of atopic dermatitis and the presence of TCIPP and tris(1,3-dichloro-2-propyl) phosphate in floor dust [per log10 -unit, odds ratio (OR): 2.43 and 1.84, respectively]. Tributyl phosphate was significantly associated with the prevalence of asthma (OR: 2.85 in floor dust, 5.34 in multi-surface dust) and allergic rhinitis (OR: 2.55 in multi-surface dust). PFR levels in Japan were high compared with values reported previously for Europe, Asia-Pacific, and the USA. Higher levels of PFRs in house dust were related to the inhabitants' health status.
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Affiliation(s)
- A Araki
- Hokkaido University Center for Environmental and Health Sciences, Sapporo, Japan; Department of Public Health Sciences, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Watkins DJ, McClean MD, Fraser AJ, Weinberg J, Stapleton HM, Webster TF. Associations between PBDEs in office air, dust, and surface wipes. Environ Int 2013; 59:124-32. [PMID: 23797055 PMCID: PMC3759556 DOI: 10.1016/j.envint.2013.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 05/13/2013] [Accepted: 06/02/2013] [Indexed: 05/06/2023]
Abstract
Increased use of flame-retardants in office furniture may increase exposure to PBDEs in the office environment. However, partitioning of PBDEs within the office environment is not well understood. Our objectives were to examine relationships between concurrent measures of PBDEs in office air, floor dust, and surface wipes. We collected air, dust, and surface wipe samples from 31 offices in Boston, MA. Correlation and linear regression were used to evaluate associations between variables. Geometric mean (GM) concentrations of individual BDE congeners in air and congener specific octanol-air partition coefficients (Koa) were used to predict GM concentrations in dust and surface wipes and compared to the measured concentrations. GM concentrations of PentaBDEs in office air, dust, and surface wipes were 472pg/m(3), 2411ng/g, and 77pg/cm(2), respectively. BDE209 was detected in 100% of dust samples (GM=4202ng/g), 93% of surface wipes (GM=125pg/cm(2)), and 39% of air samples. PentaBDEs in dust and air were moderately correlated with each other (r=0.60, p=0.0003), as well as with PentaBDEs in surface wipes (r=0.51, p=0.003 for both dust and air). BDE209 in dust was correlated with BDE209 in surface wipes (r=0.69, p=0.007). Building (three categories) and PentaBDEs in dust were independent predictors of PentaBDEs in both air and surface wipes, together explaining 50% (p=0.0009) and 48% (p=0.001) of the variation respectively. Predicted and measured concentrations of individual BDE congeners were highly correlated in dust (r=0.98, p<0.0001) and surface wipes (r=0.94, p=002). BDE209 provided an interesting test of this equilibrium partitioning model as it is a low volatility compound. Associations between PentaBDEs in multiple sampling media suggest that collecting dust or surface wipes may be a convenient method of characterizing exposure in the indoor environment. The volatility of individual congeners, as well as physical characteristics of the indoor environment, influence relationships between PBDEs in air, dust, and surface wipes.
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Affiliation(s)
- Deborah J Watkins
- Boston University School of Public Health, Dept. of Environmental Health, 715 Albany Street, Boston, MA 02118, USA.
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Suzuki G, Tue NM, Malarvannan G, Sudaryanto A, Takahashi S, Tanabe S, Sakai SI, Brouwer A, Uramaru N, Kitamura S, Takigami H. Similarities in the endocrine-disrupting potencies of indoor dust and flame retardants by using human osteosarcoma (U2OS) cell-based reporter gene assays. Environ Sci Technol 2013; 47:2898-908. [PMID: 23398518 DOI: 10.1021/es304691a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Indoor dust is a sink for many kinds of pollutants, including flame retardants (FRs), plasticizers, and their contaminants and degradation products. These pollutants can be migrated to indoor dust from household items such as televisions and computers. To reveal high-priority end points of and contaminant candidates in indoor dust, using CALUX reporter gene assays based on human osteosarcoma (U2OS) cell lines, we evaluated and characterized the endocrine-disrupting potencies of crude extracts of indoor dust collected from Japan (n = 8), the United States (n = 21), Vietnam (n = 10), the Philippines (n = 17), and Indonesia (n = 10) and for 23 selected FRs. The CALUX reporter gene assays used were specific for compounds interacting with the human androgen receptor (AR), estrogen receptor α (ERα), progesterone receptor (PR), glucocorticoid receptor (GR), and peroxisome proliferator-activated receptor γ2 (PPARγ2). Indoor dust extracts were agonistic to ERα, GR, and PPARγ2 and antagonistic against AR, PR, GR, and PPARγ2. In comparison, a majority of FRs was agonistic to ERα and PPARγ2 only, and some FRs demonstrated receptor-specific antagonism against all tested nuclear receptors. Hierarchical clustering clearly indicated that agonism of ERα and antagonism of AR and PR were common, frequently detected end points for indoor dust and tested FRs. Given our previous results regarding the concentrations of FRs in indoor dust and in light of our current results, candidate contributors to these effects include not only internationally controlled brominated FRs but also alternatives such as some phosphorus-containing FRs. In the context of indoor pollution, high-frequency effects of FRs such as agonism of ERα and antagonism of AR and PR are candidate high-priority end points for further investigation.
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Affiliation(s)
- Go Suzuki
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba, Japan, Tsukuba 305-8506, Japan.
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Shoeib M, Harner T, Webster GM, Sverko E, Cheng Y. Legacy and current-use flame retardants in house dust from Vancouver, Canada. Environ Pollut 2012; 169:175-182. [PMID: 22402458 DOI: 10.1016/j.envpol.2012.01.043] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Accepted: 01/29/2012] [Indexed: 05/31/2023]
Abstract
Fifteen polybrominated diphenyl ethers (PBDEs) and eighteen non-PBDEs were measured in 116 dust samples collected from homes in Vancouver, Canada during 2007-2008 as part of the Chemicals Health and Pregnancy (CHirP) study. The highest concentrations of PBDEs in house dust were observed for BDE 209, with a median concentration of 1350 ng/g. This is about two times greater than the median concentration of the PentaBDE (represented by the most abundant compounds in this formulation, ΣBDE 47, 99 and 100). In the case of non-PBDE FRs, a detection frequency between 81% and 100% was observed for nine analytes including: HBCD, BTBPE, BEHTBP, EHTBB, HBB, PBTO, PBBe, ATE and DP. The high detection of new FRs in indoor environments reflects their ubiquitous presence in indoor environment due to regulation of the PBDEs. Exposure to FRs are estimated based on these data for adults and toddlers.
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Affiliation(s)
- Mahiba Shoeib
- Atmospheric Science and Technology Directorate, Environment Canada, Toronto, Ontario, Canada.
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Björklund JA, Sellström U, de Wit CA, Aune M, Lignell S, Darnerud PO. Comparisons of polybrominated diphenyl ether and hexabromocyclododecane concentrations in dust collected with two sampling methods and matched breast milk samples. Indoor Air 2012; 22:279-288. [PMID: 22212125 DOI: 10.1111/j.1600-0668.2011.00765.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
UNLABELLED Household dust from 19 Swedish homes was collected using two different sampling methods: from the occupant's own home vacuum cleaner after insertion of a new bag and using a researcher-collected method where settled house dust was collected from surfaces above floor level. The samples were analyzed for 16 polybrominated diphenyl ether (PBDE) congeners and total hexabromocyclododecane (HBCD). Significant correlations (r = 0.60-0.65, Spearman r = 0.47-0.54, P < 0.05) were found between matched dust samples collected with the two sampling methods for ∑OctaBDE and ∑DecaBDE but not for ∑PentaBDE or HBCD. Statistically significantly higher concentrations of all PBDE congeners were found in the researcher-collected dust than in the home vacuum cleaner bag dust (VCBD). For HBCD, however, the concentrations were significantly higher in the home VCBD samples. Analysis of the bags themselves indicated no or very low levels of PBDEs and HBCD. This indicates that there may be specific HBCD sources to the floor and/or that it may be present in the vacuum cleaners themselves. The BDE-47 concentrations in matched pairs of VCBD and breast milk samples were significantly correlated (r = 0.514, P = 0.029), indicating that one possible exposure route for this congener may be via dust ingestion. PRACTICAL IMPLICATIONS The statistically significant correlations found for several individual polybrominated diphenyl ether (PBDE) congeners, ∑OctaBDE and ∑DecaBDE between the two dust sampling methods in this study indicate that the same indoor sources contaminate both types of dust or that common processes govern the distribution of these compounds in the indoor environment. Therefore, either method is adequate for screening ∑OctaBDE and ∑DecaBDE in dust. The high variability seen between dust samples confirms results seen in other studies. For hexabromocyclododecane (HBCD), divergent results in the two dust types indicate differences in contamination sources to the floor than to above-floor surfaces. Thus, it is still unclear which dust sampling method is most relevant for HBCD as well as for ∑PentaBDE in dust and, further, which is most relevant for determining human exposure to PBDEs and HBCD.
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Affiliation(s)
- J A Björklund
- Department of Applied Environmental Science (ITM), Stockholm University, Stockholm, Sweden National Food Administration, Uppsala, Sweden.
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Fernie KJ, Marteinson SC, Bird DM, Ritchie IJ, Letcher RJ. Reproductive changes in American kestrels (Falco sparverius) in relation to exposure to technical hexabromocyclododecane flame retardant. Environ Toxicol Chem 2011; 30:2570-2575. [PMID: 21898552 DOI: 10.1002/etc.652] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/06/2011] [Accepted: 07/28/2011] [Indexed: 05/31/2023]
Abstract
Recently, the ban of hexabromocyclododecane (HBCD), a high-production-volume flame retardant, was announced in Europe and North America. However, the effects of HCBD remain understudied in birds. The objectives of the present comparative effects study were to determine whether exposure to an HBCD technical mixture (HBCD-TM) altered avian reproductive measures at an environmentally relevant concentration. American kestrels were exposed daily by food to HBCD-TM, i.e., 0.51 µg HBCD/g kestrel/d; exposed kestrels laid eggs that had α-HBCD concentrations (163.5 ± 75.1 ng/g wet wt) tenfold greater than β- and γ-HBCD isomers, an isomer profile and concentrations similar to those of eggs of wild peregrine falcons (Falco peregrinus). Concentrations of HBCD were not detected in the control kestrel eggs. In comparison with controls, the kestrels exposed to HBCD began to lay their eggs 6 d earlier and laid larger clutches of smaller eggs. The size of the eggs was inversely correlated with the in ovo α-HBCD concentrations. The smaller eggs of the HBCD exposed kestrels also lost more weight by midincubation, suggesting increased eggshell porosity since eggshell thickness was comparable. Generally birds that lay more eggs and lay earlier in the breeding season gain the advantage of better hatching and fledging success, yet the kestrels exposed to HBCD failed to have better reproductive success than the control birds. These reproductive changes were a function of HBCD exposure, likely through changes in food consumption, with possible impacts on, for example, reproductive behavior and/or alterations in thyroid hormones.
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Affiliation(s)
- Kim J Fernie
- Wildlife and Landscape Science Directorate, Environment Canada, Burlington, Ontario, Canada.
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Abstract
The authors studied 194 women exposed to polybrominated biphenyls (PBB) in utero when their mothers consumed products accidentally contaminated in Michigan in 1973. Generalized estimating equations were used to examine the effect of in utero PBB exposure on adult pregnancy-related outcomes. Compared to those with the lowest exposure (≤1 ppb), those with mid-range (>1-3.16 ppb) and high (≥3.17 ppb) PBB exposure had increased odds of spontaneous abortion with wide confidence intervals (odds ratio [OR] = 2.75, 95% confidence interval [CI] = 0.64-11.79, OR = 4.08, 95% CI = 0.94-17.70; respectively; p for trend = .05). Exposure during infancy to PBB-contaminated breast milk further increased this risk. Time to pregnancy and infertility were not associated with in utero exposure to PBB. Future studies should examine the suggested relationship between spontaneous abortion and other brominated flame retardants.
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Affiliation(s)
- Chanley M Small
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA 30322, USA.
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Tue NM, Sudaryanto A, Minh TB, Isobe T, Takahashi S, Viet PH, Tanabe S. Accumulation of polychlorinated biphenyls and brominated flame retardants in breast milk from women living in Vietnamese e-waste recycling sites. Sci Total Environ 2010; 408:2155-2162. [PMID: 20116831 DOI: 10.1016/j.scitotenv.2010.01.012] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 01/06/2010] [Accepted: 01/08/2010] [Indexed: 05/28/2023]
Abstract
This study investigated the contamination status of PCBs, PBDEs and HBCDs in human and possible exposure pathways in three Vietnamese e-waste recycling sites: Trang Minh (suburb of Hai Phong city), Dong Mai and Bui Dau (Hung Yen province), and one reference site (capital city Hanoi) by analysing human breast milk samples and examining the relationships between contaminant levels and lifestyle factors. Levels of PBDEs, but not PCBs and HBCDs, were significantly higher in Trang Minh and Bui Dau than in the reference site. The recyclers from Bui Dau had the highest levels of PBDEs (20-250 ng g(-1) lipid wt.), higher than in the reference group by two orders of magnitude and more abundant than PCBs (28-59 ng g(-1) lipid wt.), and were also the only group with significant exposure to HBCDs (1.4-7.6 ng g(-1) lipid wt.). A specific accumulation, unrelated to diet, of low-chlorinated PCBs and high-brominated PBDEs was observed in e-waste recyclers, suggesting extensive exposure to these compounds during e-waste recycling activities, possibly through inhalation and ingestion of dust. The estimated infant intake dose of PBDEs from breast milk of some mothers occupationally involved in e-waste recycling were close to or higher than the reference doses issued by the U.S. EPA.
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Affiliation(s)
- Nguyen Minh Tue
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan
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Hachisuka A, Nakamura R, Sato Y, Nakamura R, Shibutani M, Teshima R. [Effects of perinatal exposure to the brominated flame-retardant hexabromocyclododecane (HBCD) on the developing immune system in rats]. Kokuritsu Iyakuhin Shokuhin Eisei Kenkyusho Hokoku 2010:58-64. [PMID: 21381397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
To evaluate the developmental immunotoxicity of brominated flame retardant, hexabromocyclododecane (HBCD) , maternal Sprague-Dawley rats were given HBCD at dietary concentrations of 0, 100, 1000, 10000 ppm from gestational day 10 to postnatal day 21 (postnatal week 3, PNW3). At PNW3 and PNW11, lymphocytes in the spleen, thymus, and peripheral blood of male pups were subjected to flow cytometric analyses for expression of surface markers (CD3, CD4, CD8a, CD25, CD45RA, CD71, and CD161 (NKRP1A)). The spleen and thymus weights, and number of white blood cells of two organs did not change between HBCD-exposed and control groups at PNW3 and PNW11. A significant decrease in thyroid hormone T3 and increase in serum albumin concentration were observed at PNW3 and lasted until PNW11. By flow cytometric analysis, the dramatic change was not observed in the population of the splenic and thymic T/B lymphocyte between the HBCD treated groups and control group. In the peripheral blood of BNW3 rats, the population of activated T cells was decreased and that of inactivated B cells was increased. And the population of NK cells in the spleen was decreased. All of these changes were mild in degree, and returned to the normal levels by PNW11. Production of anti-KLH IgG antibody after KLH immunization was reduced by the 10000 ppm HBCD treatment. These results suggest that developmental exposure to the highest dose of HBCD had a weak immunomodulatory effect at PNW3, and most of the immunomodulatory effect had recovered to normal levels by PNW11.
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47
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Small CM, DeCaro JJ, Terrell ML, Dominguez C, Cameron LL, Wirth J, Marcus M. Maternal exposure to a brominated flame retardant and genitourinary conditions in male offspring. Environ Health Perspect 2009; 117:1175-9. [PMID: 19654930 PMCID: PMC2717147 DOI: 10.1289/ehp.0800058] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Accepted: 02/27/2009] [Indexed: 05/03/2023]
Abstract
BACKGROUND The upward trend in industrial nations in the incidence of male genitourinary (GU) conditions may be attributed to increased exposure to endocrine disruptors. Polybrominated biphenyl (PBB), a brominated flame retardant, is one such suspected endocrine disruptor. OBJECTIVE We investigated the relationship between maternal serum levels of PBBs and GU conditions among male offspring exposed in utero. METHODS In this cohort study of sons born to women accidentally exposed to PBBs during 1973-1974, we examined self-reported data on GU conditions among male offspring in relation to maternal serum PBB levels. We used generalized estimating equations to calculate odds ratios (ORs), controlling for gestational age at birth. RESULTS Of 464 sons, 33 reported any GU condition (13 hernias, 10 hydroceles, 9 cryptorchidism, 5 hypospadias, and 1 varicocele). Four reported both hernia and hydrocele, and one both hernia and cryptorchidism. After adjustment for gestational age at birth, sons of highly exposed women (> 5 ppb) were twice as likely to report any GU condition compared with sons of the least exposed women [< or =1 ppb; OR = 2.0; 95% confidence interval (CI), 0.8-5.1]. This risk was increased when we excluded sons born after the exposure but before the mother's serum PBB measurement (OR = 3.1; 95% CI, 1.0-9.1). We found evidence of a 3-fold increase in reported hernia or hydrocele among sons with higher PBB exposure (test of trend p-value = 0.04). Neither hypospadias nor cryptorchidism was individually associated with PBB exposure. CONCLUSIONS Although cryptorchidism and hypospadias were not associated with in utero PBB exposure, this study suggests that other GU conditions may be associated with exposure to endocrine-disrupting chemicals during development.
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Affiliation(s)
- Chanley M Small
- Department of Epidemiology, Emory University, Atlanta, Georgia 30322, USA.
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Costa LG, Giordano G, Tagliaferri S, Caglieri A, Mutti A. Polybrominated diphenyl ether (PBDE) flame retardants: environmental contamination, human body burden and potential adverse health effects. Acta Biomed 2008; 79:172-183. [PMID: 19260376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are an important class of flame retardants, widely used in a variety of consumer products. In the past several years, PBDEs have become widespread environmental pollutants, and have been detected in water, soil, air, animals and human tissues. Exposure occurs in particular through the diet and the indoor environment. Infants and toddlers have the highest body burden, due to exposure via maternal milk and through house dust. Tetra-, penta- and hexa-BDEs are the congeners most commonly found in humans. Recent concerns on possible adverse health effects of PBDEs are focusing on their potential endocrine disrupting effects and on developmental neurotoxicity.
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Affiliation(s)
- Lucio G Costa
- Department of Human Anatomy, Pharmacology, and Forensic Science, University of Parma Medical School, Parma, Italy.
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49
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50
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Akutsu K, Takatori S, Nozawa S, Yoshiike M, Nakazawa H, Hayakawa K, Makino T, Iwamoto T. Polybrominated diphenyl ethers in human serum and sperm quality. Bull Environ Contam Toxicol 2008; 80:345-350. [PMID: 18320132 DOI: 10.1007/s00128-008-9370-4] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Accepted: 01/28/2008] [Indexed: 05/26/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are widely used flame retardants; currently, they are identified as ubiquitous environmental contaminants. Several studies indicate that PBDEs might affect male fertility. We present the results of a pilot study on the relationship between human serum PBDEs and sperm quality. The PBDE levels in Japan are comparable to those found in European countries. Strong inverse correlations were observed between the serum concentration of 2,2',4,4',5,5'-hexabromodiphenyl ether and sperm concentration (r = -0.841, p = 0.002) and testis size (r = -0.764, p = 0.01). Extensive studies on the relationship between PBDEs and sperm quality are required.
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Affiliation(s)
- K Akutsu
- Division of Food Chemistry, Osaka Prefectural Institute of Public Health, Osaka, 537-0025, Japan.
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