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Endocrine disrupting chemicals

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https://www.readbyqxmd.com/read/29679915/application-of-solar-photo-fenton-for-benzophenone-type-uv-filters-removal
#1
Henry Zúñiga-Benítez, Gustavo A Peñuela
Benzophenones (BPs) family is one of the most frequently used groups of UV-filters. However, it has been reported by different authors that this kind of chemical compounds could be associated with some endocrine disrupting activity, genotoxicity and reproductive toxicity. In addition, different studies have evidenced the presence of BPs in several environmental matrices, indicating that conventional technologies of water treatment are not able to remove them, which generates the necessity of evaluating new alternatives of remediation...
April 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29676761/estrogenic-activity-selected-plasticizers-and-potential-health-risks-associated-with-bottled-water-in-south-africa
#2
Natalie H Aneck-Hahn, Magdalena C Van Zijl, Pieter Swart, Barry Truebody, Bettina Genthe, Jessica Charmier, Christiaan De Jager
Potential endocrine disrupting chemicals (EDCs) are present in bottled water from various countries. In South Africa (SA), increased bottled water consumption and concomitant increases in plastic packaging create important consequences for public health. This study aimed to screen SA bottled water for estrogenic activity, selected target chemicals and assessing potential health risks. Ten bottled water brands were exposed to 20 °C and 40 °C over 10 days. Estrogenic activity was assessed using the recombinant yeast estrogen screen (YES) and the T47D-KBluc reporter gene assay...
April 2018: Journal of Water and Health
https://www.readbyqxmd.com/read/29668838/organizational-effects-of-the-antiandrogen-vinclozolin-on-penis-development-in-the-mouse
#3
Ciro M Amato, Morgan Boyd, Joshua Yang, Krista A McCoy
Endocrine disrupting chemicals (EDCs) are pollutants found throughout the environment that disrupt normal endocrine processes. In mice, penis development is thought to be most susceptible to EDCs during a critical developmental window occurring on embryonic days (E) 15.5-17.5. However, androgen signaling begins on E13.5 when Androgen Receptor (AR) protein is found in the genitalia and testosterone is circulating. We hypothesize that disrupting androgen signaling prior to the established critical window sensitizes the penis to future androgen disruption...
April 14, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29667746/an-integrative-approach-combining-passive-sampling-bioassays-and-effect-directed-analysis-to-assess-the-impact-of-wastewater-effluent
#4
Manoj Sonavane, Jennifer E Schollée, Anita O Hidasi, Nicolas Creusot, François Brion, Marc J-F Suter, Juliane Hollender, Selim Aït-Aïssa
Wastewater treatment plant (WWTP) effluents are major sources of endocrine disrupting chemicals (EDCs) and of other chemicals of toxicological concern for the aquatic environment. In this study, we used an integrated strategy combining passive sampling (Chemcatcher®), developmental toxicity and mechanism-based in vitro and in vivo bioassays to monitor the impacts of a WWTP on a river. In vitro screening revealed the WWTP effluent as a source of estrogen (ER), glucocorticoid (GR), aryl hydrocarbon (AhR) receptor mediated activities, impacting the downstream river site where significant activities were also measured, albeit to a lesser extent than in the effluent...
April 18, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29666409/exposure-to-phthalate-an-endocrine-disrupting-chemical-alters-the-first-trimester-placental-methylome-and-transcriptome-in-women
#5
N M Grindler, L Vanderlinden, R Karthikraj, K Kannan, S Teal, A J Polotsky, T L Powell, I V Yang, T Jansson
Phthalates are known endocrine disruptors and associated with decreased fecundity, pregnancy loss, and adverse obstetrical outcomes, however the underlying mechanisms remain to be established. Environmental factors can influence gene expression and cell function by modifying epigenetic marks, impacting the developing embryo as well as future generations of offspring. The impact of phthalates on placental gene methylation and expression is largely unknown. We studied the effect of maternal phthalate exposure on the human placental DNA methylome and transcriptome...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666266/dna-methylation-and-transcriptome-aberrations-mediated-by-er%C3%AE-in-mouse-seminal-vesicles-following-developmental-des-exposure
#6
Yin Li, Katherine J Hamilton, Tianyuan Wang, Laurel A Coons, Wendy N Jefferson, Ruifang Li, Yu Wang, Sara A Grimm, J Tyler Ramsey, Liwen Liu, Kevin E Gerrish, Carmen J Williams, Paul A Wade, Kenneth S Korach
Early transient developmental exposure to an endocrine active compound, diethylstilbestrol (DES), a synthetic estrogen, causes late-stage effects in the reproductive tract of adult mice. Estrogen receptor alpha (ERα) plays a role in mediating these developmental effects. However, the developmental mechanism is not well known in male tissues. Here, we present genome-wide transcriptome and DNA methylation profiling of the seminal vesicles (SVs) during normal development and after DES exposure. ERα mediates aberrations of the mRNA transcriptome in SVs of adult mice following neonatal DES exposure...
April 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29665550/polyfluorinated-iodine-alkanes-regulated-distinct-breast-cancer-cell-progression-through-binding-with-estrogen-receptor-alpha-or-beta-isoforms
#7
Wenting Song, Qian S Liu, Zhendong Sun, Xiaoxi Yang, Qunfang Zhou, Guibin Jiang
Polyfluorinated iodine alkanes (PFIs) are a kind of emerging chemicals with endocrine disrupting effects. Based on the different binding preferences of PFIs to estrogen receptor alpha and beta isoforms (ERα and β), two representative PFIs, dodecafluoro-1,6-diiodohexane (PFHxDI) and tridecafluorohexyl iodide (PFHxI), were selected to evaluate their effects on the proliferation of two kinds of breast cancer cells with different ERα/β expression levels, MCF-7 and T47D. The cell viability assay showed PFHxDI could cause higher cellular toxicity than did PFHxI in both MCF-7 and T47D...
April 14, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29665464/urinary-biomarkers-of-polycyclic-aromatic-hydrocarbons-in-pre-and-peri-pubertal-girls-in-northern-california-predictors-of-exposure-and-temporal-variability
#8
Dina Dobraca, Raymond Lum, Andreas Sjödin, Antonia M Calafat, Cecile A Laurent, Lawrence H Kushi, Gayle C Windham
BACKGROUND: Polycyclic aromatic hydrocarbons (PAHs), a class of chemicals produced as combustion by-products, have been associated with endocrine disruption. To understand exposure in children, who have been less studied than adults, we examined PAH metabolite concentrations by demographic characteristics, potential sources of exposure, and variability over time, in a cohort study of pre- and peri-pubertal girls in Northern California. METHODS: Urinary concentrations of ten PAH metabolites and cotinine were quantified in 431 girls age 6-8 years at baseline...
April 14, 2018: Environmental Research
https://www.readbyqxmd.com/read/29662485/our-environment-shapes-us-the-importance-of-environment-and-sex-differences-in-regulation-of-autoantibody-production
#9
REVIEW
Michael Edwards, Rujuan Dai, S Ansar Ahmed
Consequential differences exist between the male and female immune systems' ability to respond to pathogens, environmental insults or self-antigens, and subsequent effects on immunoregulation. In general, females when compared with their male counterparts, respond to pathogenic stimuli and vaccines more robustly, with heightened production of antibodies, pro-inflammatory cytokines, and chemokines. While the precise reasons for sex differences in immune response to different stimuli are not yet well understood, females are more resistant to infectious diseases and much more likely to develop autoimmune diseases...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29660612/perfluoroalkyl-substances-and-glycemic-status-in-pregnant-danish-women-the-odense-child-cohort
#10
Richard Christian Jensen, Dorte Glintborg, Clara Amalie Gade Timmermann, Flemming Nielsen, Henriette Boye Kyhl, Helle Raun Andersen, Philippe Grandjean, Tina Kold Jensen, Marianne Andersen
BACKGROUND: Perfluoroalkyl substances (PFASs) are persistent chemicals with suspected endocrine disrupting abilities applied in consumer products. PFASs have potentially modulating effects on glucose homeostasis. Insulin resistance prevails during third trimester of pregnancy, and this challenge of glucose homeostasis may reveal putative effects of PFAS concentrations on glycemic status. OBJECTIVE: To investigate associations between five serum PFASs and glucose-related outcomes in pregnant Danish women based on their risk of gestational diabetes mellitus (GDM)...
April 13, 2018: Environment International
https://www.readbyqxmd.com/read/29649703/modeling-the-exposure-of-wild-fish-to-endocrine-active-chemicals-potential-linkages-of-total-estrogenicity-to-field-observed-intersex
#11
Maricor J Arlos, Wayne J Parker, José R Bicudo, Pam Law, Keegan A Hicks, Meghan L M Fuzzen, Susan A Andrews, Mark R Servos
Decades of studies on endocrine disruption have suggested the need to manage the release of key estrogens from municipal wastewater treatment plants (WWTP). However, the proposed thresholds are below the detection limits of most routine chemical analysis, thereby restricting the ability of watershed managers to assess the environmental exposure appropriately. In this study, we demonstrated the utility of a mechanistic model to address the data gaps on estrogen exposure. Concentrations of the prominent estrogenic contaminants in wastewaters (estrone, estradiol, and ethinylestradiol) were simulated in the Grand River in southern Ontario (Canada) for nine years, including a period when major WWTP upgrades occurred...
April 3, 2018: Water Research
https://www.readbyqxmd.com/read/29642594/allosteric-activation-of-gdp-bound-ras-isoforms-by-bisphenol-derivative-plasticisers
#12
Miriam Schöpel, Oleksandr Shkura, Jana Seidel, Klaus Kock, Xueyin Zhong, Stefanie Löffek, Iris Helfrich, Hagen S Bachmann, Jürgen Scherkenbeck, Christian Herrmann, Raphael Stoll
The protein family of small GTPases controls cellular processes by acting as a binary switch between an active and an inactive state. The most prominent family members are H-Ras, N-Ras, and K-Ras isoforms, which are highly related and frequently mutated in cancer. Bisphenols are widespread in modern life because of their industrial application as plasticisers. Bisphenol A (BPA) is the best-known member and has gained significant scientific as well as public attention as an endocrine disrupting chemical, a fact that eventually led to its replacement...
April 10, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29629442/assessment-of-endocrine-disruption-potential-of-essential-oils-of-culinary-herbs-and-spices-involving-glucocorticoid-androgen-and-vitamin-d-receptors
#13
Iveta Bartoňková, Zdeněk Dvořák
Essential oils (EOs) of culinary herbs and spices are consumed on a daily basis. They are multicomponent mixtures of compounds with already demonstrated biological activities. Taking into account regular dietary intake and the chemical composition of EOs, they may be considered as candidates for endocrine-disrupting entities. Therefore, we examined the effects of 31 EOs of culinary herbs and spices on transcriptional activities of glucocorticoid receptor (GR), androgen receptor (AR) and vitamin D receptor (VDR)...
April 9, 2018: Food & Function
https://www.readbyqxmd.com/read/29623614/effects-of-halogenated-contaminants-on-reproductive-development-in-wild-mink-neovison-vison-from-locations-in-canada
#14
John E Elliott, David Anthony Kirk, Pamela A Martin, Laurie K Wilson, Gabriela Kardosi, Sandi Lee, Tana McDaniel, Kimberley D Hughes, Barry D Smith, Abde Miftah Idrissi
The concept of the Anthropocene, that humans are now re-engineering global ecosystems, is in part evidenced by the pervasive pollution by persistent organic pollutants (POPs). Certain POPs are hormone mimics and can disrupt endocrine and hence reproductive processes, shown mainly by laboratory studies with model species. There are, in contrast, fewer confirmations of such disruption from eco-epidemiological studies of wild mammals. Here we used the American mink (Neovison vison) as a sentinel species for such a study...
April 6, 2018: Ecotoxicology
https://www.readbyqxmd.com/read/29623359/endocrine-disrupting-activities-and-organic-contaminants-associated-with-oil-and-gas-operations-in-wyoming-groundwater
#15
Christopher D Kassotis, Danh C Vu, Phuc H Vo, Chung-Ho Lin, Jennifer N Cornelius-Green, Sharyle Patton, Susan C Nagel
Unconventional oil and natural gas (UOG) operations couple horizontal drilling with hydraulic fracturing to access previously inaccessible fossil fuel deposits. Hydraulic fracturing, a common form of stimulation, involves the high-pressure injection of water, chemicals, and sand to fracture the target layer and release trapped natural gas and/or oil. Spills and/or discharges of wastewater have been shown to impact surface, ground, and drinking water. The goals of this study were to characterize the endocrine activities and measure select organic contaminants in groundwater from conventional oil and gas (COG) and UOG production regions of Wyoming...
April 5, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29615977/overview-of-the-pathophysiological-implications-of-organotins-on-the-endocrine-system
#16
REVIEW
Vinicius Bermond Marques, Rodrigo Alves Faria, Leonardo Dos Santos
Organotins (OTs) are pollutants that are used widely by industry as disinfectants, pesticides, and most frequently as biocides in antifouling paints. This mini-review presents the main evidences from the literature about morphophysiological changes induced by OTs in the mammal endocrine system, focusing on the metabolism and reproductive control. Similar to other toxic compounds, the main effects with potential health risks to humans and experimental animals are not only related to dose and time of exposure but also to age, gender, and tissue/cell exposed...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29615064/childhood-and-adolescent-phenol-and-phthalate-exposure-and-the-age-of-menarche-in-latina-girls
#17
Alexandra M Binder, Camila Corvalan, Antonia M Calafat, Xiaoyun Ye, Verónica Mericq, Ana Pereira, Karin B Michels
BACKGROUND: The age of menarche has been associated with metabolic and cardiovascular disease, as well as cancer risk. The decline in menarcheal age over the past century may be partially attributable to increased exposure to endocrine disrupting chemicals (EDCs). METHODS: We assessed the influence of 26 phenol and phthalate biomarkers on the timing of menarche in a longitudinal cohort of Chilean girls. These EDCs were quantified in urine collected prior to the onset of breast development (Tanner 1; B1), and during adolescence (Tanner 4; B4)...
April 3, 2018: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29611697/high-throughput-screening-and-quantitative-chemical-ranking-for-sodium-iodide-symporter-nis-inhibitors-in-toxcast-phase-i-chemical-library
#18
Jun Wang, Daniel Hallinger, Ashley Murr, Angela Buckalew, Steven O'Neal Simmons, Susan C Laws, Tammy Stoker
Thyroid uptake of iodide via the sodium-iodide symporter (NIS) is the first step in the biosynthesis of thyroid hormones that are critical for health and development in humans and wildlife. Despite having long been a known target of endocrine disrupting chemicals such as perchlorate, information regarding NIS inhibition activity is still unavailable for the vast majority of environmental chemicals. This study applied a previously validated high-throughput approach to screen for NIS inhibitors in the ToxCast phase I library, representing 293 important environmental chemicals...
April 3, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29610974/the-role-of-pollutants-in-type-2-diabetes-mellitus-t2dm-and-their-prospective-impact-on-phytomedicinal-treatment-strategies
#19
John Baptist Nzukizi Mudumbi, Seteno Karabo Obed Ntwampe, Lukhanyo Mekuto, Tandi Matsha, Elie Fereche Itoba-Tombo
Type 2 diabetes mellitus (T2DM) is the most common form of diabetes and it is characterized by high blood sugar and abnormal sera lipid levels. Although the specific reasons for the development of these abnormalities are still not well understood, traditionally, genetic and lifestyle behavior have been reported as the leading causes of this disease. In the last three decades, the number of diabetic patients has drastically increased worldwide, with current statistics suggesting the number is to double in the next two decades...
April 2, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29606598/maternal-urinary-phthalate-metabolites-during-pregnancy-and-thyroid-hormone-concentrations-in-maternal-and-cord-sera-the-home-study
#20
Megan E Romano, Melissa N Eliot, R Thomas Zoeller, Andrew N Hoofnagle, Antonia M Calafat, Margaret R Karagas, Kimberly Yolton, Aimin Chen, Bruce P Lanphear, Joseph M Braun
BACKGROUND: Phthalates, endocrine-disrupting chemicals that are commonly found in consumer products, may adversely affect thyroid hormones, but findings from prior epidemiologic studies are inconsistent. OBJECTIVES: In a prospective cohort study, we investigated whether maternal urinary phthalate metabolite concentrations and phthalate mixtures measured during pregnancy were associated with thyroid hormones among pregnant women and newborns. METHODS: We measured nine phthalate metabolites [monoethyl phthalate (MEP), mono-n-butyl phthalate, mono-isobutyl phthalate, monobenzyl phthalate (MBzP), and four monoesthers of di(2-ethylhexyl) phthalate] in urine collected at approximately 16 and 26 weeks' gestation among women in the Health Outcomes and Measures of the Environment Study (2003-2006, Cincinnati, Ohio)...
March 23, 2018: International Journal of Hygiene and Environmental Health
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