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https://www.readbyqxmd.com/read/27919640/the-french-human-biomonitoring-program-first-lessons-from-the-perinatal-component-and-future-needs
#1
Clémentine Dereumeaux, Clémence Fillol, Marie-Aline Charles, Sébastien Denys
This paper presents a progress report of the French human biomonitoring (HBM) program established in 2010. This program has been designed to provide a national representative estimation of the French population's exposure to various environmental chemicals and to study the determinants of exposure. This program currently consists in two surveys: a perinatal component related to a selection of 4145 pregnant women who have been enrolled in the Elfe cohort (the French Longitudinal Study since Childhood) in 2011, and a general population survey related to adults aged 18-74 years and children as from 6 years (Esteban)...
November 17, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27916131/synthesis-of-nano-hydroxyapatite-sorbent-for-microextraction-in-packed-syringe-of-phthalate-esters-in-water-samples
#2
Amirhassan Amiri, Mohammad Chahkandi, Azadeh Targhoo
An easy alkoxide-based sol-gel method using Ca(NO3)2·4H2O and tri-ethyl phosphate (PO(OC2H5)3; TEP) precursors employed to synthesize nano-hydroxyapatite (HAP). The structural characterization of samples was studied using XRD, TEM and elemental analysis of SEM. Scherrer and Williamson-Hall equations were applied to measurement of the crystallite size distributions and micro-strain of the synthesized HAP powder. The synthesized HAP nanoparticles were applied as an efficient sorbent for the microextraction in packed syringe (MEPS) of phthalate esters (PAEs) from water samples...
January 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/27913566/th2-responses-are-primed-by-skin-dendritic-cells-with-distinct-transcriptional-profiles
#3
Lisa M Connor, Shiau-Choot Tang, Emmanuelle Cognard, Sotaro Ochiai, Kerry L Hilligan, Samuel I Old, Christophe Pellefigues, Ruby F White, Deepa Patel, Adam Alexander T Smith, David A Eccles, Olivier Lamiable, Melanie J McConnell, Franca Ronchese
The dendritic cell signals required for the in vivo priming of IL-4-producing T cells are unknown. We used RNA sequencing to characterize DCs from skin LN of mice exposed to two different Th2 stimuli: the helminth parasite Nippostrongylus brasiliensis (Nb) and the contact sensitizer dibutyl phthalate (DBP)-FITC. Both Nb and DBP-FITC induced extensive transcriptional changes that involved multiple DC subsets. Surprisingly, these transcriptional changes were highly distinct in the two models, with only a small number of genes being similarly regulated in both conditions...
December 2, 2016: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27910926/ionic-liquids-modified-graphene-oxide-composites-a-high-efficient-adsorbent-for-phthalates-from-aqueous-solution
#4
Xinguang Zhou, Yinglu Zhang, Zuteng Huang, Dingkun Lu, Anwei Zhu, Guoyue Shi
In 2015, more than 30% of erasers were found to contain a PAE content that exceeded the 0.1% limit established by the Quality and Technology Supervision Bureau of Jiangsu Province in China. Thus, strengthening the supervision and regulation of the PAE content in foods and supplies, in particular, remains necessary. Graphene oxide (GO) and its composites have drawn great interests as promising adsorbents for polar and nonpolar compounds. However, GO-based adsorbents are typically restricted by the difficult separation after treatment because of the high pressure in filtration and low density in centrifugation...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910652/measurement-and-models-of-bent-kap-001-crystal-integrated-reflectivity-and-resolution-invited
#5
G P Loisel, M Wu, W Stolte, C Kruschwitz, P Lake, G S Dunham, J E Bailey, G A Rochau
The Advanced Light Source beamline-9.3.1 x-rays are used to calibrate the rocking curve of bent potassium acid phthalate (KAP) crystals in the 2.3-4.5 keV photon-energy range. Crystals are bent on a cylindrically convex substrate with a radius of curvature ranging from 2 to 9 in. and also including the flat case to observe the effect of bending on the KAP spectrometric properties. As the bending radius increases, the crystal reflectivity converges to the mosaic crystal response. The X-ray Oriented Programs (xop) multi-lamellar model of bent crystals is used to model the rocking curve of these crystals and the calibration data confirm that a single model is adequate to reproduce simultaneously all measured integrated reflectivities and rocking-curve FWHM for multiple radii of curvature in both 1st and 2nd order of diffraction...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27907809/does-exposure-to-phthalates-influence-thyroid-function-and-growth-hormone-homeostasis-the-taiwan-environmental-survey-for-toxicants-test-2013
#6
Han-Bin Huang, Wen-Harn Pan, Jung-Wei Chang, Hung-Che Chiang, Yue Leon Guo, Jouni J K Jaakkola, Po-Chin Huang
BACKGROUND: Previous epidemiologic and toxicological studies provide some inconsistent evidence that exposure to phthalates may affect thyroid function and growth hormone homeostasis. OBJECTIVE: To assess the relations between exposure to phthalates and indicators of thyroid function and growth hormone homeostasis disturbances both among adults and minors. METHODS: We conducted a population-based cross-sectional study of 279 Taiwanese adults (≥18 years old) and 79 minors (<18 years old) in 2013...
November 28, 2016: Environmental Research
https://www.readbyqxmd.com/read/27898309/diverging-temporal-trends-of-human-exposure-to-bisphenols-and-plastizisers-such-as-phthalates-caused-by-substitution-of-legacy-edcs
#7
Irina Gyllenhammar, Anders Glynn, Bo A G Jönsson, Christian H Lindh, Per Ola Darnerud, Kettil Svensson, Sanna Lignell
Phthalates and phenolic substances were investigated in urine samples from first-time mothers in Uppsala, Sweden, collected between 2009 and 2014. These substances have a comparably fast metabolism and urinary metabolites are predominantly analysed. The main aim was to investigate if measures to decrease production and use of certain phthalates and bisphenol A (BPA) have resulted in decreased human exposure, and to determine if exposures to replacement chemicals have increased. Temporal trends were evaluated for metabolites (n=13) of seven phthalates, a phthalate replacer, four different bisphenols, triclosan, one organophosphate-based flame retardant, and for two pesticides...
November 26, 2016: Environmental Research
https://www.readbyqxmd.com/read/27888119/prenatal-phthalate-triclosan-and-bisphenol-a-exposures-and-child-visual-spatial-abilities
#8
Joseph M Braun, David C Bellinger, Russ Hauser, Robert O Wright, Aimin Chen, Antonia M Calafat, Kimberly Yolton, Bruce P Lanphear
INTRODUCTION: During fetal development, sex steroids influence sexually dimorphic behaviors, such as visual-spatial abilities. Thus, endocrine disrupting chemicals that impact sex steroids during gestation may affect these behaviors. OBJECTIVE: We investigated the relationship between prenatal urinary phthalate metabolite, triclosan, and BPA concentrations and visual-spatial abilities in a prospective cohort of 198 mother-child dyads. METHODS: Data are from a prospective cohort in Cincinnati, OH (HOME Study)...
November 23, 2016: Neurotoxicology
https://www.readbyqxmd.com/read/27885243/di-n-butyl-phthalate-induced-hypospadias-relates-to-autophagy-in-genital-tubercle-via-the-pi3k-akt-mtor-pathway
#9
Xiang Li, Jinhao Li, Ya Zhang, Yun Zhou
OBJECTIVE: To explore the mechanisms of hypospadias induced by in utero exposure to din-butyl phthalate (DBP). METHODS: Timed-pregnant Sprague-Dawley rats were administered 750 mg/kg of DBP by gavage from GD (gestation days) 13 to GD 18, whereas control group received corn oil. Genital tubercles (GTs) and blood samples were collected from male fetuses on GD 19. The serum testosterone concentration, apoptosis activity, autophagosomes and their related proteins (light chain 3 (LC3-I, LC3-II)), and sequestosomes (SQSTM1/p62) in the GTs were then measured...
November 22, 2016: Journal of Occupational Health
https://www.readbyqxmd.com/read/27884522/exposure-to-phthalates-in-children-aged-5-7years-associations-with-thyroid-function-and-insulin-like-growth-factors
#10
Wei Wu, Feng Zhou, Yue Wang, Yong Ning, Jian-Ye Yang, Yi-Kai Zhou
This study aimed to evaluate the associations between phthalate concentrations and thyroid function in preschool children. We collected demographic data and biological samples from 216 children aged 5-7years. We calculated urinary concentrations of eight mono-phthalate metabolites (mPAEs) separately for children from urban and rural areas and investigated their associations with thyroid function and growth hormones. mPAE concentrations were higher in children from the urban area than in those from the rural area, and most mPAEs were positively associated with free triiodothyronine and free thyroxine...
November 21, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27882676/highly-selective-coextraction-of-rhodamine-b-and-dibenzyl-phthalate-based-on-high-density-dual-template-imprinted-shells-on-silica-microparticles
#11
Zerong Long, Weiwei Xu, Yumei Peng, Yi Lu, Qian Luo, Hongdeng Qiu
A simple one-pot approach based on molecularly imprinted polymer shells dispersed on the surface of silica for simultaneous determination of rhodamine B and dibenzyl phthalate has been developed. Highly dense molecularly imprinted polymer shells were formed in the mixture of acetonitrile and toluene by the copolymerization of methacrylic acid and ethylene glycol dimethacrylate, as well as two templates, rhodamine B and dibenzyl phthalate, at the directing by the vinyl end groups functional monolayer at surface silica microspheres after 3-methacryloxypropyl trimethoxysilane modification...
November 24, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27876227/phthalate-levels-and-related-factors-in-children-aged-6-12-years
#12
Wei Wu, Feng Zhou, Yue Wang, Yong Ning, Jian-Ye Yang, Yi-Kai Zhou
Although previous studies showed that children are widely exposed to phthalates, the sources of phthalate exposure for school-aged children in China are not well understood. This study aimed to assess phthalate metabolite levels and explore the factors influencing exposure in children. We collected demographic data and biological samples from 336 children aged 6-12 years. We calculated urinary concentrations of 14 mono-phthalate metabolites and conducted chi-square (χ(2)) tests and logistic regression analysis to determine the variables associated with phthalate levels...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27875712/urinary-phthalate-and-phthalate-alternative-metabolites-and-isoprostane-among-couples-undergoing-fertility-treatment
#13
Haotian Wu, Alexandra Olmsted, David E Cantonwine, Shahin Shahsavari, Tayyab Rahil, Cynthia Sites, J Richard Pilsner
BACKGROUND: Epidemiological data suggest associations between phthalate exposures to a variety of adverse reproductive outcomes including reduced sperm quality and reproductive success. While mechanisms of these associations are not fully elucidated, oxidative stress has been implicated as a potential mediator. We examined associations of urinary metabolites of phthalates and phthalate alternative plasticizers with oxidative stress among couples seeking fertility treatment. METHODS: Seventeen urinary plasticizer metabolites and 15-F2t isoprostane, a biomarker of oxidative stress, were quantified in spot samples from 50 couples seeking fertility treatment who enrolled in the Sperm Environmental Epigenetics and Development Study during 2014-2015...
November 19, 2016: Environmental Research
https://www.readbyqxmd.com/read/27871981/oral-exposure-to-diisodecyl-phthalate-aggravates-allergic-dermatitis-by-oxidative-stress-and-enhancement-of-thymic-stromal-lymphopoietin
#14
Shiping Shen, Jinquan Li, Huihui You, Zhuo Wu, Yang Wu, Yun Zhao, Yuqing Zhu, Qing Guo, Xiaoxiao Li, Rui Li, Ping Ma, Xu Yang, Mingqing Chen
Diisodecyl phthalate (DIDP) is extensively used as an environmentally friendly plasticizer. However, little is known about the adverse effects and the underlying mechanisms of DIDP exposure on immunological diseases. We aimed to determine the role and mechanisms of DIDP exposure in allergic contact dermatitis-like skin lesions. We show that oral DIDP exposure can aggravate allergic dermatitis in mice. Moreover, an increase of ROS, total serum IgE and IL-4 levels were concomitant with this deterioration. We detected the expression of Thymic stromal lymphopoietin (TSLP) and the activation of STATs and NF-κB signal pathways...
November 18, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27866379/effects-of-oral-exposure-to-the-phthalate-substitute-acetyl-tributyl-citrate-on-female-reproduction-in-mice
#15
Lindsay M Rasmussen, Nivedita Sen, Xiaosong Liu, Zelieann R Craig
Acetyl tributyl citrate (ATBC), is a phthalate substitute used in food and medical plastics, cosmetics and toys. Although systemically safe up to 1000 mg kg(-1)  day(-1) , its ability to cause reproductive toxicity in females at levels below 50 mg kg(-1)  day(-1) has not been examined. This study evaluated the effects of lower ATBC exposures on female reproduction using mice. Adult CD-1 females (n = 7-8 per treatment) were dosed orally with tocopherol-stripped corn oil (vehicle), 5 or 10 mg kg(-1)  day(-1) ATBC daily for 15 days, and then bred with a proven breeder male...
November 20, 2016: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/27865856/melatonin-loaded-silica-coated-with-hydroxypropyl-methylcellulose-phthalate-for-enhanced-oral-bioavailability-preparation-and-in-vitro-in-vivo-evaluation
#16
Yuanyuan Li, Xiuhua Zhao, Yuangang Zu, Lingling Wang, Weiwei Wu, Yiping Deng, Chang Zu, Yanjie Liu
Melatonin (MLT) is a small molecule with low water solubility and high permeability. According to the Biopharmaceutics Classification System, MLT is a class II drug exhibiting a very short half-life and minimal and variable bioavailability. This work aimed to establish a delivery system composed of an enteric MLT nanosphere with favorably controlled and sustained release characteristics superior to those of raw MLT. The nanosphere was composed of hydroxypropyl methylcellulose phthalate (HP55) and silica (SiO2) with MLT...
November 17, 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27864543/long-non-coding-rnas-a-novel-paradigm-for-toxicology
#17
REVIEW
Joseph L Dempsey, Julia Yue Cui
Long non-coding RNAs (lncRNAs) are over 200 nucleotides in length and are transcribed from the mammalian genome in a tissue-specific and developmentally regulated pattern. There is growing recognition that lncRNAs are novel biomarkers and/or key regulators of toxicological responses in humans and animal models. Lacking protein-coding capacity, the numerous types of lncRNAs possess a myriad of transcriptional regulatory functions that include cis and trans gene expression, transcription factor activity, chromatin remodeling, imprinting, and enhancer up-regulation...
November 17, 2016: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/27863867/prenatal-di-2-ethylhexyl-phthalate-exposure-and-cord-blood-adipokine-levels-and-birth-size-the-hokkaido-study-on-environment-and-children-s-health
#18
Machiko Minatoya, Atsuko Araki, Chihiro Miyashita, Seiko Sasaki, Yuko Goto, Tamie Nakajima, Reiko Kishi
Di-2-ethylhexyl phthalate (DEHP) is one of the most widely used phthalates. Metabolites of DEHP are detectable in majority of the population. Findings on adverse health outcomes, particularly birth weight in association with prenatal exposure to DEHP remain equivocal. Besides, there is insufficient evidence to address influence on metabolic function from epidemiological studies. Thus, our objective was to investigate cord blood adipokine levels and birth size in association with prenatal DEHP exposure in prospective birth cohort study...
November 15, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27863804/phthalate-metabolites-in-24-h-urine-samples-of-the-german-environmental-specimen-bank-esb-from-1988-to-2015-and-a-comparison-with-us-nhanes-data-from-1999-to-2012
#19
Holger M Koch, Maria Rüther, André Schütze, André Conrad, Claudia Pälmke, Petra Apel, Thomas Brüning, Marike Kolossa-Gehring
The German Environmental Specimen Bank (ESB) continuously collects 24-h urine samples since the early 1980s in Germany. In this study we analyzed 300 urine samples from the years 2007 to 2015 for 21 phthalate metabolites (representing exposure to 11 parent phthalates) and combined the data with two previous retrospective measurement campaigns (1988 to 2003 and 2002 to 2008). The combined dataset comprised 1162 24-h urine samples spanning the years 1988 to 2015. With this detailed set of human biomonitoring data we describe the time course of phthalate exposure in Germany over a time frame of 27 years...
November 9, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27863430/diisononyl-phthalate-aggravates-allergic-dermatitis-by-activation-of-nf-kb
#20
Jun Kang, Jing Song, Shiping Shen, Baizhan Li, Xu Yang, Mingqing Chen
Several epidemiological studies have suggested a possible link between exposure to Diisononyl phthalate (DINP) and the development of allergies. These findings remain controversial since there is insufficient scientific evidence to assess the ability of DINP to influence allergic immune responses. In addition, the mechanisms behind DINP-caused allergic diseases have not been fully elucidated. In this study, Balb/c mice were orally exposed to DINP for 3 weeks and were then sensitized with fluorescein isothiocyanate (FITC)...
November 16, 2016: Oncotarget
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