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Endocrine disrupting chemicals

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https://www.readbyqxmd.com/read/27902959/kaempferol-a-phytoestrogen-suppressed-triclosan-induced-epithelial-mesenchymal-transition-and-metastatic-related-behaviors-of-mcf-7-breast-cancer-cells
#1
Geum-A Lee, Kyung-Chul Choi, Kyung-A Hwang
As a phytoestrogen, kaempferol is known to play a chemopreventive role inhibiting carcinogenesis and cancer progression. In this study, the influences of triclosan, an anti-bacterial agent recently known for an endocrine disrupting chemical (EDC), and kaempferol on breast cancer progression were examined by measuring their effects on epithelial-mesenchymal transition (EMT) and metastatic-related behaviors of MCF-7 breast cancer cells. Morphological changes of MCF-7 cells were observed, and a wound-healing assay was performed after the treatment of triclosan and kaempferol...
November 22, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/27897085/bisphenol-a-in-soft-drinks-and-canned-foods-and-data-evaluation
#2
Manolis N Tzatzarakis, Vasiliki Karzi, Elena Vakonaki, Marina Goumenou, Matthaios Kavvalakis, Polychronis Stivaktakis, Christina Tsitsimpikou, Ioannis Tsakiris, Apostolos Rizos, Aristidis M Tsatsakis
Bisphenol A is one of the most common industrial chemicals and known to exert endocrine disruption activity. The aim of this study was the quantification of BPA in food stuffs on the Greek market. The applied LC-MS (liquid chromatography mass spectrometry) method was validated for linearity, limit of quantification, accuracy, precision and recovery. 41.7% of the canned solid phase samples, 25.0 % of the canned liquid phase samples and 43.8% of the soft drinks were positive. Mean BPA concentrations (and range) were 33...
November 29, 2016: Food Additives & Contaminants. Part B, Surveillance
https://www.readbyqxmd.com/read/27889509/ultrastructural-and-developmental-evidence-of-phytotoxicity-on-cos-lettuce-lactuca-sativa-associated-with-nonylphenol-exposure
#3
Willeke de Bruin, Chris van der Merwe, Quenton Kritzinger, Riana Bornman, Lise Korsten
It has long been understood that the presence of endocrine disrupter chemicals (EDCs) in water can affect the reproductive, behavioural and regulatory systems of different types of mammals. Thus far, only a handful of studies have examined its impact on plant systems. Present research is limited to the potential uptake of these chemicals by plants and the general phytotoxic effects it can elicit. The aim of this study was to determine what effect an EDC has on developing plant and cell organelles and how it affects it...
November 24, 2016: Chemosphere
https://www.readbyqxmd.com/read/27888310/determination-of-trace-bisphenol-a-in-environmental-water-by-high-performance-liquid-chromatography-using-magnetic-reduced-graphene-oxide-based-solid-phase-extraction-coupled-with-dispersive-liquid-liquid-microextraction
#4
Danping Li, Xiaoguo Ma, Rui Wang, Yumian Yu
Bisphenol A (BPA), an endocrine-disrupting chemical, has received much attention from researchers and the general public. In this paper, a novel method of determining BPA at trace levels was developed, using magnetic reduced graphene oxide (rGO-Fe3O4)-based solid-phase extraction coupled with dispersive liquid-liquid microextraction (DLLME), followed by high-performance liquid chromatographic determination. The rGO-Fe3O4 was prepared and then characterized by Fourier transform infrared spectroscopy, transmission electron microscopy, and vibrating sample magnetometry...
November 25, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27888119/prenatal-phthalate-triclosan-and-bisphenol-a-exposures-and-child-visual-spatial-abilities
#5
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/27884472/impact-of-untreated-wastewater-on-a-major-european-river-evaluated-with-a-combination-of-in%C3%A2-vitro-bioassays-and-chemical-analysis
#6
Maria König, Beate I Escher, Peta A Neale, Martin Krauss, Klára Hilscherová, Jiří Novák, Ivana Teodorović, Tobias Schulze, Sven Seidensticker, Muhammad Arslan Kamal Hashmi, Jörg Ahlheim, Werner Brack
Complex mixtures of micropollutants, including pesticides, pharmaceuticals and industrial chemicals emitted by wastewater effluents to European rivers may compromise the quality of these water resources and may pose a risk to ecosystem health and abstraction of drinking water. In the present study, an integrated analytical and bioanalytical approach was applied to investigate the impact of untreated wastewater effluents from the city of Novi Sad, Serbia, into the River Danube. The study was based on three on-site large volume solid phase extracted water samples collected upstream and downstream of the untreated wastewater discharge...
November 21, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27883330/effects-of-17%C3%AE-estradiol-e2-on-aqueous-organisms-and-its-treatment-problem-a-review
#7
Emad Nazari, Fatihah Suja
Natural estrogens, estrone (E1), 17β-estradiol (E2) and estriol (E3) are endocrine disrupting chemicals (EDCs) that are discharged consistently and directly into surface waters with wastewater treatment plants (WWPTs) effluents, disposal sludges and in storm-water runoff. The most common and highest potential natural estrogen that causes estrogen activity in wastewater influent is E2. This review describes and attempts to summarize the main problems involved in the removal of E2 from WWTP by traditional processes, which fundamentally rely on activated sludge and provide an insufficient treatment for E2, as well as advanced oxidation processes (AOPs) that are applied in tertiary section treatment works...
December 1, 2016: Reviews on Environmental Health
https://www.readbyqxmd.com/read/27876543/in-utero-and-childhood-ddt-dde-pbde-and-pcbs-exposure-and-sex-hormones-in-adolescent-boys-the-chamacos-study
#8
Brenda Eskenazi, Stephen A Rauch, Rachel Tenerelli, Karen Huen, Nina T Holland, Robert H Lustig, Katherine Kogut, Asa Bradman, Andreas Sjodin, Kim G Harley
Dichlorodiphenyltrichloroethane (DDT), polybrominated diphenyl ether (PBDE) flame retardants, and polychlorinated biphenyls (PCBs) are believed to be endocrine-disrupting chemicals (EDCs) in humans and animals. The purpose of this study is to examine the relationship of in utero and childhood exposure to these purported EDCs and reproductive hormones in adolescent boys who participated in CHAMACOS, an ongoing birth cohort in California's Salinas Valley. We measured o,p'- and p,p'-DDT, p,p'- DDE, PBDEs and PCBs in serum collected from mothers during pregnancy or at delivery and from their sons at 9 years...
November 14, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/27866739/an-integrated-approach-for-identifying-priority-contaminant-in-the-great-lakes-basin-investigations-in-the-lower-green-bay-fox-river-and-milwaukee-estuary-areas-of-concern
#9
Shibin Li, Daniel L Villeneuve, Jason P Berninger, Brett R Blackwell, Jenna E Cavallin, Megan N Hughes, Kathleen M Jensen, Zachary Jorgenson, Michael D Kahl, Anthony L Schroeder, Kyle E Stevens, Linnea M Thomas, Matthew A Weberg, Gerald T Ankley
Environmental assessment of complex mixtures typically requires integration of chemical and biological measurements. This study demonstrates the use of a combination of instrumental chemical analyses, effects-based monitoring, and bio-effects prediction approaches to help identify potential hazards and priority contaminants in two Great Lakes Areas of Concern (AOCs), the Lower Green Bay/Fox River located near Green Bay, WI, USA and the Milwaukee Estuary, located near Milwaukee, WI, USA. Fathead minnows were caged at four sites within each AOC (eight sites total)...
November 17, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27858277/first-characterization-of-the-endocrine-disrupting-potential-of-indoor-gaseous-and-particulate-contamination-comparison-with-urban-outdoor-air-france
#10
Lucie Oziol, Fabrice Alliot, Jérémie Botton, Maya Bimbot, Viviane Huteau, Yves Levi, Marc Chevreuil
The composition of endocrine-disrupting compounds (EDCs) in the ambient air of indoor environments has already been described, but little is known about the inherent endocrine-disrupting potential of indoor air contamination. We therefore aimed to study the distribution of bioactive EDCs in the gaseous and particulate phases of indoor air using a cellular bioassay approach that integrates the interaction effects between chemicals. Organic air extracts, both gaseous and particulate, were taken from three indoor locations (office, apartment, and children's day care) in France and sampled in two different seasons in order to study their interference with the signaling of estrogen, androgen, and thyroid receptors...
November 18, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27857130/early-life-exposure-to-edcs-role-in-childhood-obesity-and-neurodevelopment
#11
REVIEW
Joseph M Braun
Endocrine-disrupting chemicals (EDCs) might increase the risk of childhood diseases by disrupting hormone-mediated processes that are critical for growth and development during gestation, infancy and childhood. The fetus, infant and child might have enhanced sensitivity to environmental stressors such as EDCs due to their rapid development and increased exposure to some EDCs as a consequence of development-specific behaviour, anatomy and physiology. In this Review, I discuss epidemiological studies examining the relationship between early-life exposure to bisphenol A (BPA), phthalates, triclosan and perfluoroalkyl substances (PFAS) with childhood neurobehavioural disorders and obesity...
November 18, 2016: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/27855330/behavioural-effect-of-low-dose-bpa-on-male-zebrafish-tuning-of-male-mating-competition-and-female-mating-preference-during-courtship-process
#12
Xiang Li, Jia-Yu Guo, Xu Li, Hai-Jun Zhou, Shu-Hui Zhang, Xiao-Dong Liu, Dong-Yan Chen, Yong-Chun Fang, Xi-Zeng Feng
The ubiquity of environmental pollution by endocrine disrupting chemicals (EDCs) such as bisphenol A (BPA) is progressively considered as a major threat to aquatic ecosystems worldwide. Numerous toxicological studies have proved that BPA are hazardous to aquatic environment, along with alterations in the development and physiology of aquatic vertebrates. However, generally, there is a paucity in knowledge of behavioural and physiological effects of BPA with low concentration, for example, 0.22 nM (50 ng/L) and 2...
November 14, 2016: Chemosphere
https://www.readbyqxmd.com/read/27855314/alterations-of-gene-expression-indicating-effects-on-estrogen-signaling-and-lipid-homeostasis-in-seabream-hepatocytes-exposed-to-extracts-of-seawater-sampled-from-a-coastal-area-of-the-central-adriatic-sea-italy
#13
Paolo Cocci, Martina Capriotti, Gilberto Mosconi, Alessandra Campanelli, Emanuela Frapiccini, Mauro Marini, Giovanni Caprioli, Gianni Sagratini, Graziano Aretusi, Francesco Alessandro Palermo
Recent evidences suggest that the toxicological effects of endocrine disrupting chemicals (EDCs) involve multiple nuclear receptor-mediated pathways, including estrogen receptor (ER) and peroxisome proliferator-activated receptor (PPAR) signaling systems. Thus, our objective in this study was to detect the summated endocrine effects of EDCs with metabolic activity in coastal waters of the central Adriatic Sea by means of a toxicogenomic approach using seabream hepatocytes. Gene expression patterns were also correlated with seawater levels of polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs)...
November 2, 2016: Marine Environmental Research
https://www.readbyqxmd.com/read/27853434/expression-of-steroid-receptors-in-ameloblasts-during-amelogenesis-in-rat-incisors
#14
Sophia Houari, Sophia Loiodice, Katia Jedeon, Ariane Berdal, Sylvie Babajko
Endocrine disrupting chemicals (EDCs) play a part in the modern burst of diseases and interfere with the steroid hormone axis. Bisphenol A (BPA), one of the most active and widely used EDCs, affects ameloblast functions, leading to an enamel hypomineralization pattern similar to that of Molar Incisor Hypomineralization (MIH). In order to explore the molecular pathways stimulated by BPA during amelogenesis, we thoroughly investigated the receptors known to directly or indirectly mediate the effects of BPA. The expression patterns of high affinity BPA receptors (ERRγ, GPR30), of ketosteroid receptors (ERs, AR, PGR, GR, MR), of the retinoid receptor RXRα, and PPARγ were established using RT-qPCR analysis of RNAs extracted from microdissected enamel organ of adult rats...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27852690/maternal-use-of-mild-analgesics-during-pregnancy-associated-with-reduced-anogenital-distance-in-sons-a-cohort-study-of-1027-mother-child-pairs
#15
Dorte Vesterholm Lind, Katharina M Main, Henriette Boye Kyhl, David Møbjerg Kristensen, Jorma Toppari, Helle Raun Andersen, Marianne Skovsager Andersen, Niels E Skakkebæk, Tina Kold Jensen
STUDY QUESTION: Is maternal use of mild analgesics in pregnancy associated with anogenital distance (AGD)-the distance from the anus to the genitals-in the offspring? SUMMARY ANSWER: Maternal use of mild analgesics [especially simultaneous use of paracetamol and nonsteroidal anti-inflammatory drugs (NSAIDs)] during pregnancy was associated with a shorter AGD in boys whereas no effect was found in girls. WHAT IS KNOWN ALREADY: Mild analgesics including paracetamol (acetaminophen) and NSAIDs (e...
November 16, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27849367/fetal-exposure-to-low-levels-of-the-plasticizer-dehp-predisposes-the-adult-male-adrenal-gland-for-endocrine-disruption
#16
S Lee, D B Martinez-Arguelles, E Campioli, V Papadopoulos
In utero exposure to endocrine disrupting chemicals (EDCs) may affect adult health. Di-(2-ethylhexyl) phthalate (DEHP) is an EDC widely used in the production of polyvinyl chloride products and an ubiquitous environmental contaminant. Previously, we used a rat model system to show that fetal exposure to DEHP decreased levels of major steroid hormones in adulthood and that environmentally-relevant levels of DEHP affected both gene expression and epigenomic loci that were affected by exposure to high levels. In the adrenal gland, we reported that the peroxisome proliferator-activated receptor (PPAR) and cholesterol biosynthesis pathways were sensitive targets of DEHP...
November 16, 2016: Endocrinology
https://www.readbyqxmd.com/read/27837466/thyroid-disruption-by-perfluorooctane-sulfonate-pfos-and-perfluorooctanoate-pfoa
#17
REVIEW
F Coperchini, O Awwad, M Rotondi, F Santini, M Imbriani, L Chiovato
BACKGROUND: Perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) are two fluorinated compounds widely used in industry because of their useful chemical characteristics. They were identified as endocrine disruptors due to their ability to interfere with thyroid function. The resistance of PFOA and PFOS to environmental degradation, their bio-accumulation in food chains, and their long half-life raised concern in the scientific community, and several studies were performed with the aim to establish the real dangerousness of these compounds for the human health...
November 11, 2016: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/27834078/epidemiology-of-childhood-obesity-in-korea
#18
REVIEW
Kyoung Hwa Ha, Dae Jung Kim
Over the past several decades, the prevalence of obesity has increased dramatically worldwide and is increasing not only in developed countries, but also in developing countries. This increase may lead to an increase in the incidence of chronic diseases throughout the lifespan. In Korean children and adolescents, the prevalence of obesity increased from 6.8% in 1998 to 10.0% in 2013. Obesity is a state that more commonly influences children and adolescents of lower socioeconomic status (SES) than those with a higher SES...
November 3, 2016: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27830418/do-estrogenic-compounds-in-drinking-water-migrating-from-plastic-pipe-distribution-system-pose-adverse-effects-to-human-an-analysis-of-scientific-literature
#19
Ze-Hua Liu, Hua Yin, Zhi Dang
With the widespread application of plastic pipes in drinking water distribution system, the effects of various leachable organic chemicals have been investigated and their occurrence in drinking water supplies is monitored. Most studies focus on the odor problems these substances may cause. This study investigates the potential endocrine disrupting effects of the migrating compound 2,4-di-tert-butylphenol (2,4-d-t-BP). The summarized results show that the migration of 2,4-d-t-BP from plastic pipes could result in chronic exposure and the migration levels varied greatly among different plastic pipe materials and manufacturing brands...
November 9, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27829162/second-trimester-amniotic-fluid-bisphenol-a-concentration-is-associated-with-decreased-birth-weight-in-term-infants
#20
Sara E Pinney, Clementina A Mesaros, Nathaniel W Snyder, Christine M Busch, Rui Xiao, Sara Aijaz, Naila Ijaz, Ian A Blair, Jeanne M Manson
Bisphenol A (BPA) is an endocrine disrupting chemical with ubiquitous environmental exposure. Animal studies have demonstrated that in utero BPA exposure leads to increased adult body weight. Our aim was to characterize human fetal BPA exposure by measuring BPA concentration in second trimester amniotic fluid (AF) samples and to study its relationship with birth weight (BW) in full term infants. To achieve these goals, we developed a total BPA assay utilizing derivatization with pentafluorobenzyl followed by analysis with LC-ECAPCI-MS/MS with a limit of detection of 0...
November 6, 2016: Reproductive Toxicology
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