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Ann M Vuong, Kimberly Yolton, Kim N Dietrich, Joseph M Braun, Bruce P Lanphear, Aimin Chen
Polybrominated diphenyl ethers (PBDEs) are recognized neurotoxicants, but the extent to which PBDEs influence various domains of behavior in children is not fully understood. As such, we reviewed epidemiologic studies published to date to provide an overview of the current state of knowledge on PBDEs' potential role in behavioral development. We identified 19 epidemiologic studies reporting on associations of prenatal and childhood concentrations of PBDEs with behaviors assessed in children from 1 to 12years, including executive function, attention, externalizing and internalizing behaviors, adaptive skills, and social behaviors/Autism Spectrum Disorder (ASD)...
November 11, 2017: Hormones and Behavior
Juan Wu, Yunqiang Yi, Zhanqiang Fang, Eric Pokeung Tsang
In this study, soil culture experiments were conducted to explore the effects of biochar-supported Ni/Fe nanoparticles on the accumulation and translocation of polybrominated diphenyl ethers (PBDEs) in soil-plant system and its phytotoxicity to Brassica chinensis. Compared with those in BDE209 contaminated soils (S 1) and Ni/Fe nanoparticle-treated soil (S 3), the plant biomass, root, and shoot lengths in biochar-supported Ni/Fe nanoparticle-treated soil (S 4) were increased by 23 mg, 1.35 cm, and 2.08 cm and 27...
November 11, 2017: Environmental Science and Pollution Research International
Whitney J Cowell, Andreas Sjödin, Richard Jones, Ya Wang, Shuang Wang, Julie B Herbstman
Polybrominated diphenyl ethers (PBDEs) are environmentally persistent chemicals that structurally resemble legacy pollutants, such as polychlorinated biphenyls (PCBs). PBDEs were added to consumer products for over 30 years, before being phased out due to evidence of toxicity. We examined temporal changes in prenatal exposure to PBDEs, as well as other sources of variation. We measured PBDEs in umbilical cord plasma from 327 minority infants born in New York City between 1998 and 2006. We used linear regression to examine changes in concentrations over time and in relation to lifestyle characteristics collected during pregnancy...
November 8, 2017: Environmental Pollution
Jiandi Wang, Yuwei Wang, Zhixiong Shi, Xianqing Zhou, Zhiwei Sun
Levels of legacy brominated flame retardants (BFRs), including tetrabromobisphenol A (TBBPA), hexabromocyclododecane isomers (HBCDs) and polybrominated diphenyl ethers (PBDEs), and six currently used novel BFRs were determined in house dust and office dust collected from a community in Beijing, China. This is the first study where the three kinds of legacy BFRs and novel BFRs were all measured in dust samples from China. HPLC-MS/MS was used for the detection of TBBPA and HBCDs, and the other BFRs were tested on a GC-NCI/MS...
November 7, 2017: Science of the Total Environment
Gulchohra Aliyeva, Carrie Amber Sinnott-Clark, Ondřej Audy, Lenka Škrdlíková, Petr Kukučka, Jana Klánová, Crispin Halsall
PBDEs were measured in air and soil across Azerbaijan to establish contemporary concentrations at 13 urban and rural sites. Polyurethane foam passive air samplers (PUF-PAS) were deployed for a period of a month with surface soil samples collected at the same sites. Unlike organochlorine pesticides previously surveyed by our group, PBDE concentrations in both contemporary air and soil were low in comparison to recent European and Asian studies. For example, mean ∑9PBDE concentrations in air and soil were 7...
November 7, 2017: Environmental Science and Pollution Research International
Elizabeth A Krumm, Vipa J Patel, Taylor S Tillery, Ali Yasrebi, Jianliang Shen, Grace L Guo, Stephanie M Marco, Brian T Buckley, Troy A Roepke
Flame retardants (FR) such as polybrominated diphenyl ethers (PBDE) and organophosphate FR (OPFR) persist in the environment and interact with multiple nuclear receptors involved in homeostasis, including estrogen receptors (ER). However, little is known about the effects of FR, especially OPFR, on mammalian neuroendocrine functions. Therefore, we investigated if exposure to FR alters hypothalamic gene expression and whole-animal physiology in adult wild-type (WT) and ERα KO mice. Intact WT and KO males and ovariectomized WT and KO females were orally dosed daily with vehicle (oil), 17α-ethynylestradiol (2...
November 3, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
Alexander Suvorov, Alex Shershebnev, Haotian Wu, Yulia Medvedeva, Oleg Sergeyev, J Richard Pilsner
Polybrominated diphenyl ethers (PBDEs) are a group of ubiquitous reproductive toxins. Given that spermatogenesis requires extensive epigenetic changes, we hypothesize that PBDEs impact sperm DNA methylation. Pregnant Wistar rats were exposed perinatally to 0.2mg/kg 2,2',4,4'-tetrabromodiphenyl ether (BDE-47) and caudal epididymal sperm were collected from offspring on postnatal days (PNDs) 65 and 120. Libraries were prepared from sperm DNA and sequenced with an average of 18.0 million unique reads per sample...
October 28, 2017: Reproductive Toxicology
Govindan Malarvannan, Kim Van Hoorenbeeck, Ann Deguchtenaere, Stijn L Verhulst, Eveline Dirinck, Luc Van Gaal, Philippe G Jorens, Adrian Covaci
We have investigated the dynamics of various persistent organic pollutants (POPs) in the serum of 94 obese adolescents (34 boys and 60 girls: age range 11-19years) before (0M) and after 5months (5M) of undergoing weight loss treatment. Six groups of POPs, such as polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs), chlordane compounds (CHLs), hexachlorocyclohexane isomers (HCHs), hexachlorobenzene (HCB) and polybrominated diphenyl ethers (PBDEs), were detected in all samples in the decreasing order of median levels: DDTs>PCBs>HCB>HCHs>CHLs>PBDEs...
January 2018: Environment International
Maria Ospina, Nayana K Jayatilaka, Lee-Yang Wong, Paula Restrepo, Antonia M Calafat
BACKGROUND: Use of organophosphate flame retardants (OPFRs) including tris(1,3-dichloro-2-propyl) phosphate, triphenyl phosphate, tris(1-chloro-2-propyl) phosphate, and tris-2-chloroethyl phosphate, in consumer products is on the rise because of the recent phase out of polybrominated diphenyl ether (PBDE) flame retardants. Some of these chemicals are also used as plasticizers or lubricants in many consumer products. OBJECTIVES: To assess human exposure to these chlorinated and non-chlorinated organophosphates, and non-PBDE brominated chemicals in a representative sample of the U...
January 2018: Environment International
Arnold Schecter, Jenevieve Kincaid, Hoang Trong Quynh, Joel Lanceta, Hanh Thi Tuyet Tran, Riley Crandall, William Shropshire, Linda S Birnbaum
OBJECTIVE: Electronic-waste is increasing.Its frequently conducted in developing countries.This is the first study to report metals, polybrominated diphenyl-ethers(PBDEs), polychlorinated biphenyls(PCBs), 2,2-bis(4-chlorophenyl)-1,1,1-trichloroethane(p,p'-DDT), and p,p'-DDE concentrations in female e-waste workers. METHODS: Female Vietnamese recyclers and non-recyclers were studied. Metals and halogenated organics were measured in blood and urine, and compared to levels in women in the US National Health and Nutrition Examination Survey(NHANES)...
November 2, 2017: Journal of Occupational and Environmental Medicine
Cheng Zhang, Pei Li, Shun Zhang, Rongrong Lei, Bei Li, Xue Wu, Chunyang Jiang, Xiaofei Zhang, Rulin Ma, Lu Yang, Chao Wang, Xiao Zhang, Tao Xia, Aiguo Wang
Polybrominated diphenyl ethers, a ubiquitous persistent organic pollutant used as brominated flame retardants, is known to damage nervous system, however the underlying mechanism is still elusive. In this study, we used human neuroblastoma SH-SY5Y cells to explore the effects of PBDE-47 on autophagy and investigate the role of autophagy in PBDE-47-induced cell death. Results showed PBDE-47 could increase autophagic level (performation of cell ultrastructure with double membrane formation, MDC-positive cells raised, autophagy-related proteins LC3-II, Beclin1 and P62 increased) after cells exposed to PBDE-47...
October 19, 2017: Environmental Toxicology and Pharmacology
Peipei Liu, Jingjing Miao, Ying Song, Luqing Pan, Pengfei Yin
The reported adverse effects of Polybrominated diphenyl ether (PBDE) congeners on gonadogenesis in fish may also occur in marine bivalves especially the burrowing species such as manila clam Ruditapes philippinarum. In this study, clams were exposed to BDE-47 for 25days at 0, 0.1 and 1μg/L. By using the water temperature control method, gonadal maturation from resting to ripe stage were observed successively in both the control and the treatment groups during 25days. The results showed that exposure to BDE-47 at concentration below 1μg/L did not delay the gonadogenesis process of the clam R...
October 26, 2017: Aquatic Toxicology
Bingqing Zhu, James C W Lam, Paul K S Lam
A total of 43 surface sediment collected from rivers and the estuaries in the Pearl River Delta (PRD) region and Mirs Bay from the South China were analyzed for twelve halogenated flame retardants (HFRs) including polybrominated diphenyl ethers (PBDEs) using liquid chromatography-tandem mass spectrometer system. Their levels, spacial distribution, congener profiles and possible sources were investigated. Decabromodiphenyl ethane (DBDPE) was the predominant contaminant (1.520-1714ng/g dw) in the study area exceeding those of PBDEs (8...
October 24, 2017: Marine Pollution Bulletin
Ann M Vuong, Kimberly Yolton, Kendra L Poston, Changchun Xie, Glenys M Webster, Andreas Sjödin, Joseph M Braun, Kim N Dietrich, Bruce P Lanphear, Aimin Chen
Prenatal exposure to polybrominated diphenyl ethers (PBDEs) have been reported to impair executive function in children, but little is known whether childhood PBDE exposures play a role. Using the Health Outcomes and Measures of the Environment (HOME) Study, a prospective birth cohort in the greater Cincinnati area, we investigated the association between repeated measures of PBDEs during childhood and executive function at 8 years in 208 children and whether effect modification by child sex was present. We used child serum collected at 1, 2, 3, 5, and 8 years to measure PBDEs...
October 16, 2017: International Journal of Hygiene and Environmental Health
Javier Castro-Jiménez, Badreddine Barhoumi, Andrea Paluselli, Marc Tedetti, Begoña Jiménez, Juan Muñoz-Arnanz, Henri Wortham, Mohamed Ridha Driss, Richard Sempéré
A comparative study for 62 toxic chemicals based on the simultaneous monthly collection of aerosol samples during 2015-2016 in two coastal cities at both the African (Bizerte, Tunisia) and European (Marseille, France) edges of the Western Mediterranean basin is presented. Legacy polychlorinated biphenyls (∑18PCBs) and polychlorinated dibenzo-p-dioxins and dibenzofurans (∑17PCDD/Fs) show generally higher median levels at the African edge (2.1 and 0.2 pg m(-3), respectively) compared to the European coastal site (1...
November 3, 2017: Environmental Science & Technology
Pierre Hennebert, Montserrat Filella
The plastics of waste of electric and electronic equipment (WEEE) are improved for fire safety by flame retardants, and particularly brominated flame retardants (BFR). As waste, the management of these plastic fractions must comply with the update of the regulation of waste hazard classification (2014, 2017), the publication of a technical standard on management of WEEE (2015), and a restriction of use for decabromodiphenylether in the product regulation (2017). Data of bromine (n=4283) and BFR concentrations (n=98) in plastics from electric and electronic equipment (EEE), and from WEEE processing facilities before and after sorting for bromine in four sites in France have been studied for chemical composition and for regulatory classification...
October 10, 2017: Waste Management
Jiyan Zhang, Lu Chen, Lin Xiao, Fengxiu Ouyang, Qing-Ying Zhang, Zhong-Cheng Luo
BACKGROUND: Polybrominated diphenyl ethers (PBDEs) are a class of flame retardants of ubiquitous presence in numerous consumer products. PBDEs may impair neurodevelopment in infants. There is a lack of meta-analysis on PBDE concentrations in human breast milk worldwide. We aimed to summarize global research data on PBDE concentrations in human breast milk specimens in recent years. METHODS: We conducted a systematic review through PubMed search of original studies on PBDE concentrations in human individual breast milk specimens collected in the general population over the recent 15-year period (2000-2015) worldwide...
October 2017: Epidemiology
Inna Ermilova, Samuel Stenberg, Alexander P Lyubartsev
A series of 19 hydroxylated polybrominated diphenyl ethers (OH-PBDEs) have been studied using density functional theory (DFT) and molecular dynamics simulations with the purpose of investigating eventual correlations between their physicochemical properties and toxic action. Dissociation constants (pKa), solvation free energies and octanol-water partition coefficients (log P) have been computed. Additionally, metadynamics simulations of OH-PBDEs passing through a lipid bilayer have been carried out for four OH-PBDE species...
October 25, 2017: Physical Chemistry Chemical Physics: PCCP
Kristiann Fry, Melinda C Power
BACKGROUND: Persistent organic pollutants (POPs) are environmentally and biologically persistent chemicals that include polybrominated diphenyl ethers (PBDEs), per- and polyfluoroalkyl substances (PFASs), polychlorinated biphenyls (PCBs), and organochlorine (OC) pesticides. Currently, data on the associations between exposure to POPs and the risk of mortality in the U.S. population is limited. Our objective was to determine if higher exposure to POPs is associated with greater risk of all-cause, cancer, heart/cerebrovascular disease, or other-cause mortality...
October 10, 2017: Environmental Health: a Global Access Science Source
Athanasios Besis, Gerhard Lammel, Petr Kukučka, Constantini Samara, Aysun Sofuoglu, Yetkin Dumanoglu, Kostas Eleftheriadis, Giorgos Kouvarakis, Sait C Sofuoglu, Vassiliki Vassilatou, Dimitra Voutsa
The occurrence and atmospheric behavior of tri- to deca-polybrominated diphenyl ethers (PBDEs) were investigated during a 2-week campaign concurrently conducted in July 2012 at four background sites around the Aegean Sea. The study focused on the gas/particle (G/P) partitioning at three sites (Ag. Paraskevi/central Greece/suburban, Finokalia/southern Greece/remote coastal, and Urla/Turkey/rural coastal) and on the size distribution at two sites (Neochorouda/northern Greece/rural inland and Finokalia/southern Greece/remote coastal)...
October 9, 2017: Environmental Science and Pollution Research International
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