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https://www.readbyqxmd.com/read/28943350/spatial-distribution-and-diversity-of-organohalide-respiring-bacteria-and-their-relationships-with-polybrominated-diphenyl-ether-concentration-in-taihu-lake-sediments
#1
Juan Chen, Pei-Fang Wang, Chao Wang, Jia-Jia Liu, Han Gao, Xun Wang
It is acknowledged that organohalide-respiring bacteria (OHRB) can degrade polybrominated diphenyl ethers (PBDEs); however, very little is known about the distribution of OHRB or their response to PBDE contamination in natural sediments. We collected sediments from 28 sampling sites in Taihu Lake, China, and investigated the spatial distribution and diversity of OHRB, and the relationships between the PBDE contamination levels and the PBDE removal potential. The abundances of five typical OHRB genera, namely Dehalobacter, Dehalococcoides, Dehalogenimonas, Desulfitobacterium, and Geobacter, ranged from 0...
September 21, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28937846/polybrominated-diphenyl-ethers-pbdes-in-floor-and-road-dust-from-a-manual-e-waste-dismantling-facility-and-adjacent-communities-in-thailand
#2
Dudsadee Muenhor, Hyo-Bang Moon, Sunggyu Lee, Emma Goosey
This study characterizes concentrations of polybrominated diphenyl ethers (PBDEs) in floor and road dust from a manual e-waste dismantling facility and adjacent communities in Thailand. Levels of Σ22 PBDEs in floor dust from the facility varied between 1,200 and 43,000 ng g(-1), whereas those from adjacent communities were in the range 6.6-2,200 ng g(-1). Concentrations of Σ22 PBDEs (43,000 ng g(-1)) were highest in floor dust collected from the facility. Levels of Σ22 PBDEs and all congeners studied, except for BDE-66, BDE-71, BDE-85, BDE-119, BDE-138, BDE-190 and BDE-191 in facility dust were significantly greater than those in residential dust (P = <0...
September 22, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28934650/influence-of-human-activities-and-organic-matters-on-occurrence-of-polybrominated-diphenyl-ethers-in-marine-sediment-core-a-case-study-in-the-southern-yellow-sea-china
#3
Guoguang Wang, Lijuan Feng, Jingshuai Qi, Xianguo Li
The Southern Yellow Sea (SYS) is an important reservoir of anthropogenic organic contaminants, such as polybrominated diphenyl ethers (PBDEs). To reconstruct the historical records of PBDEs and examine their relationships with the human activities and organic matters, a(210)Pb-dated sediment core was collected from the central mud area in the SYS. The concentrations of tri-to hepta-BDEs (∑7PBDEs) and BDE-209 ranged from 9.8 to 99.8 pg g(-1) d.w. and from 12.1 to 855.4 pg g(-1) d.w., respectively, both displaying the increasing trends from the bottom to the surface...
September 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28931875/ultrasensitive-nano-rt-ipcr-for-determination-of-polybrominated-diphenyl-ethers-in-natural-samples
#4
Xiaohan Zhang, Xianyin Ping, Huisheng Zhuang
Extensive polybrominated diphenyl ethers (PBDEs) use has resulted in its increasingly widespread presence in the environment. PBDEs release from existing products can still persist and accumulate in the environment as well as in human and wildlife magnifying through the food web. Due to its ultra-trace amount in the environment, a novel ultrasensitive nano-rt-iPCR assay has been developed to determine polybrominated diphenyl ethers in natural samples. Numerous amino-DNA and polyclonal antibody (anti-PBDE) were immobilized onto the single-walled carbon nanotubes (SWCNTs) to form antibody-SWCNTs-DNA signal amplifier used in the proposed immunoassay system...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28924500/comparison-of-polybrominated-diphenyl-ethers-pbdes-and-polychlorinated-biphenyls-pcbs-in-the-serum-of-hypothyroxinemic-and-euthyroid-dogs
#5
Grace Lau, Kyla Walter, Philip Kass, Birgit Puschner
OBJECTIVE: To determine the profile of 14 polybrominated diphenyl ethers (PBDEs) and 23 polychlorinated biphenyls (PCBs) in serum of domestic canines and whether this was predictive of thyroid hormone status. SAMPLES: Serum samples were collected from 51 client-owned dogs visiting the University of California Davis William R. Pritchard Veterinary Medical Teaching Hospital during 2012 to 2016 for routine appointments. Fifteen dogs were diagnosed with hypothyroxinemia while 36 were euthyroid...
2017: PeerJ
https://www.readbyqxmd.com/read/28911831/prenatal-and-postnatal-polybrominated-diphenyl-ether-pbde-exposure-and-measures-of-inattention-and-impulsivity-in-children
#6
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
Exposure to polybrominated diphenyl ethers (PBDEs) during fetal development may be associated with deficits in attention and impulse control. However, studies examining postnatal PBDE exposures and inattention and impulsivity have been inconsistent. Using data from 214 children in the Health Outcomes and Measures of the Environment (HOME) Study, a prospective pregnancy and birth cohort with enrollment from 2003 to 2006 in the Greater Cincinnati Area, we investigated the relationship of both prenatal and postnatal PBDE exposures with attention and impulse control...
September 11, 2017: Neurotoxicology and Teratology
https://www.readbyqxmd.com/read/28898241/alterations-in-the-programming-of-energy-metabolism-in-adolescents-with-background-exposure-to-dioxins-dl-pcbs-and-pbdes
#7
Marike M Leijs, Janna G Koppe, Thomas Vulsma, Kees Olie, Wim M C van Aalderen, Pim de Voogt, Juliette Legler, Gavin W Ten Tusscher
OBJECTIVES: Dioxins and PCBs are highly toxic and persistent environmental pollutants that are measurable in humans worldwide. These persistent organic pollutants are associated with a higher incidence of diabetes mellitus. We hypothesise that perinatal (background) exposure to industrial pollutants like dioxins also influences body mass development and energy metabolism in later life. STUDY DESIGN: In The Netherlands, the perinatal exposure (prenatal exposure and postnatal lactational intake) to dioxins has been studied prospectively since 1987...
2017: PloS One
https://www.readbyqxmd.com/read/28895873/prenatal-serum-concentrations-of-brominated-flame-retardants-and-autism-spectrum-disorder-and-intellectual-disability-in-the-early-markers-of-autism-study-a-population-based-case-control-study-in-california
#8
Kristen Lyall, Lisa A Croen, Lauren A Weiss, Martin Kharrazi, Michela Traglia, Gerald N Delorenze, Gayle C Windham
BACKGROUND: Prior studies suggest neurodevelopmental impacts of polybrominated diphenyl ethers (PBDEs), but few have examined diagnosed developmental disorders. OBJECTIVES: Our aim was to determine whether prenatal exposure to brominated flame retardants (BFRs) is associated with autism spectrum disorder (ASD) or intellectual disability without autism (ID). METHODS: We conducted a population-based case-control study including children with ASD (n=545) and ID (n=181) identified from the California Department of Developmental Services and general population (GP) controls (n=418) from state birth certificates...
August 30, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28893719/erratum-prenatal-pbde-and-pcb-exposures-and-reading-cognition-and-externalizing-behavior-in-children
#9
Hongmei Zhang, Kimberly Yolton, Glenys M Webster, Andreas Sjödin, Antonia M Calafat, Kim N Dietrich, Yingying Xu, Changchun Xie, Joseph M Braun, Bruce P Lanphear, Aimin Chen
[This corrects the article DOI: 10.1289/EHP478.].
June 30, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28892245/size-resolved-particle-measurements-of-polybrominated-diphenyl-ethers-indoors-implications-for-sources-and-human-exposure
#10
Katherine E Richman, Craig M Butt, Cora J Young
Polybrominated diphenyl ethers (PBDEs) are flame retardant polymer additives that are widely detected in outdoor and indoor environments. Release of PBDEs from consumer products leads to high concentrations indoors, but mechanisms of release are poorly understood. While ingestion of dust is a well-studied indoor PBDE exposure route, the importance of inhalation exposure is uncertain. To address these unknowns, dust was collected from household vacuum cleaners, and suspended particulate matter (PM) was collected from the same homes in St...
September 11, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28886598/a-human-mixture-risk-assessment-for-neurodevelopmental-toxicity-associated-with-polybrominated-diphenyl-ethers-used-as-flame-retardants
#11
Olwenn V Martin, Richard M Evans, Michael Faust, Andreas Kortenkamp
BACKGROUND: The European Food Safety Authority recently concluded that the exposure of small children (1-3 y old) to brominated diphenyl ether (BDE)-99 may exceed acceptable levels defined in relation to neurodevelopmental toxicity in rodents. The flame retardant BDE-209 may release BDE-99 and other lower brominated BDEs through biotic and abiotic degradation, and all age groups are exposed not only to BDE-209 and -99 but also to a cocktail of BDE congeners with evidence of neurodevelopmental toxicity...
August 23, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28884398/developmental-exposure-of-decabromodiphenyl-ether-impairs-subventricular-zone-neurogenesis-and-morphology-of-granule-cells-in-mouse-olfactory-bulb
#12
Mingrui Xu, Yingxue Huang, Kaikai Li, Xinran Cheng, Guohong Li, Mengmeng Liu, Yufei Nie, Shu Geng, Shanting Zhao
Polybrominated diphenyl ethers (PBDEs) are additive flame retardants widely used in various products (e.g., textiles, consumer electronics, and plastics). Strong evidence indicates that PBDEs are developmental neurotoxicants that can cause neurodevelopmental disabilities and cognitive defects. Currently, decabromodiphenyl ether (BDE 209) is the only PBDE permitted for production in most countries. This study investigated the impact of BDE 209 on postnatal neurogenesis in the subventricular zone (SVZ) of ICR mice...
September 7, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28881238/in-silico-investigation-of-gas-particle-partitioning-equilibrium-of-polybrominated-diphenyl-ethers-pbdes
#13
Xiaoxuan Wei, Quan Yuan, Bakire Serge, Ting Xu, Guangcai Ma, Haiying Yu
Polybrominated diphenyl ethers (PBDEs), a group of typical brominated flame retardants (BFRs), have drawn an increasing concern due to their widespread manufacture, usage and disposal around the world and the frequent detection in a variety of environmental media. In the present study, we investigated the molecular mechanism of the partitioning equilibrium of PBDEs between gas and atmospheric particles, and developed a new temperature-dependent predictive model for the gas/particle partition coefficient (KP) of these chemicals...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28880749/exposure-to-decabromodiphenyl-ether-bde-209-produces-mitochondrial-dysfunction-in-rat-liver-and-cell-death
#14
Lilian C Pereira, Alecsandra O Souza, Maria J Tasso, Alana M C Oliveira, Filipe V Duarte, Carlos M Palmeira, Daniel J Dorta
Polybrominated diphenyl ethers (PBDE) are ubiquitous environmental pollutants. Exposure to these chemicals has been associated with developmental neurotoxicity, endocrine dysfunctions, reproductive disorders, and hepatotoxicity. The widespread use of PBDE as flame retardants has culminated in daily exposure of humans and wildlife to these contaminants and resulted in their banned use. Thus assessment of the potential effects of each PBDE congener on living organisms has become cause for concern. The aim of this study was to (1) examine the effects of decabromodiphenyl ether (BDE)-209 on different functions of HepG2 cells and (2) investigate whether this congener is involved in mitochondrial toxicity...
September 7, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28871397/vertical-distribution-of-archaeal-communities-associated-with-anaerobic-degradation-of-pentabromodiphenyl-ether-bde-99-in-river-based-groundwater-recharge-with-reclaimed-water
#15
Yulin Yan, Mengsi Ma, Xiang Liu, Weifang Ma, Yangyao Li
When groundwater is recharged with reclaimed water, the presence of trace amounts of biorefractory pentabromodiphenyl ether (PBDE, specifically BDE-99) might cause potential groundwater pollution. A laboratory-scale column was designed to investigate the distribution of the community of archaea in this scenario and the associated anaerobic degradation of BDE-99. The concentration of BDE-99 decreased significantly as soil depth increased, and fluorescence in situ hybridization (FISH) analysis suggested that archaea exerted significant effects on the biodegradation of PBDE...
September 4, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28869876/associations-between-internal-exposure-levels-of-persistent-organic-pollutants-in-adipose-tissue-and-deep-infiltrating-endometriosis-with-or-without-concurrent-ovarian-endometrioma
#16
Stéphane Ploteau, German Cano-Sancho, Christelle Volteau, Arnaud Legrand, Anaïs Vénisseau, Vincent Vacher, Philippe Marchand, Bruno Le Bizec, Jean-Philippe Antignac
Endometriosis is a gynaecological disease characterized by the presence of ectopic endometrial tissue. Histologically, it appears as different sub-types, being peritoneal endometriosis, ovarian endometrioma (OvE) and deep infiltrating endometriosis (DIE), which are of major relevance due to their varying clinical presentations. A number of persistent organic pollutants (POPs) have been associated with the onset of endometriosis, yet the overall set of existing studies remains fairly divergent. In this preliminary case-control study we aimed to assess the potential associations between the internal exposure to POPs and the presence of DIE with or without concurrent OvE...
September 1, 2017: Environment International
https://www.readbyqxmd.com/read/28869857/bde-47-and-bde-85-stimulate-insulin-secretion-in-ins-1-832-13-pancreatic-%C3%AE-cells-through-the-thyroid-receptor-and-akt
#17
Shpetim Karandrea, Huquan Yin, Xiaomei Liang, Emma A Heart
PBDEs (polybrominated diphenyl ethers) are environmental pollutants that have been linked to the development of type 2 diabetes, however, the precise mechanisms are not clear. Particularly, their direct effect on insulin secretion is unknown. In this study, we show that two PBDE congeners, BDE-47 and BDE-85, potentiate glucose-stimulated insulin secretion (GSIS) in INS-1 832/13 cells. This effect of BDE-47 and BDE-85 on GSIS was dependent on thyroid receptor (TR). Both BDE-47 and BDE-85 (10μM) activated Akt during an acute exposure...
September 1, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28865385/intake-distribution-and-metabolism-of-decabromodiphenyl-ether-and-its-main-metabolites-in-chickens-and-implications-for-human-dietary-exposure
#18
Jing-Xin Wang, Lian-Jun Bao, Pei Luo, Lei Shi, Charles S Wong, Eddy Y Zeng
Diet is considered as the most important human exposure pathway for polybrominated diphenyl ethers (PBDEs). Metabolism and accumulation patterns of PBDEs in different growth periods of chickens are helpful for evaluating human dietary exposure, but such information is scarce. In this study, female chickens were fed with food spiked with BDE-209 at 85 mg kg(-1), and the intake, accumulation, and excretion of BDE-209 and its main metabolites in various tissues were examined. Concentrations of BDE-209 in chicken tissues increased over time in a tissue-specific manner; they were the greatest in liver and generally the lowest in breast meat during the entire exposure period...
August 30, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28864748/novel-interactions-between-gut-microbiome-and-host-drug-processing-genes-modify-the-hepatic-metabolism-of-the-environmental-chemicals-pbdes
#19
Cindy Yanfei Li, Soowan Lee, Sara Cade, Li-Jung Kuo, Irvin R Schultz, Deepak K Bhatt, Bhagwat Prasad, Theo K Bammler, Julia Yue Cui
The gut microbiome is a novel frontier in xenobiotic metabolism. Polybrominated diphenyl ethers (PBDEs), especially BDE-47 and BDE-99, are among the most abundant and persistent environmental contaminants that produce a variety of toxicities. Little is known about how the gut microbiome affects the hepatic metabolism of PBDEs and the PBDE-mediated regulation of drug-processing genes (DPGs) in vivo. The goal of this study was to determine the role of gut microbiome in modulating the hepatic biotransformation of PBDEs...
September 1, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28863388/children-s-exposure-to-brominated-flame-retardants-in-indoor-environments-a-review
#20
REVIEW
Eleftheria Malliari, Olga-Ioanna Kalantzi
The aim of this review is to present up-to-date research on children's exposure to brominated flame retardants (BFRs) in indoor environments. Large geographical variations were observed for all BFRs [polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane (HBCDD), tetrabromobisphenol A (TBBPA)], with the highest concentrations of PBDEs measured in North America (BDE-47) and Europe (BDE-209), where higher concentrations of PBDEs are present in dust from houses, daycare centers and primary schools. In Asia the highest PBDE concentrations were measured in China, near e-waste recycling areas...
August 28, 2017: Environment International
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