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https://www.readbyqxmd.com/read/28528315/bisphenol-a-and-replacements-in-thermal-paper-a-review
#1
REVIEW
Maria K Björnsdotter, Jacob de Boer, Ana Ballesteros-Gómez
Thermal paper contains potentially toxic compounds such as bisphenol A (BPA), which is used as a color developer. BPA has been reported in thermal paper in concentrations up to 42,600 μg g(-1). The exposure to BPA via dermal transfer has been recently discussed as a significant contribution to the overall human exposure and the estimated daily intake (EDI) has been reported up to 218 μg d(-1). BPA has been also detected in recycled paper with concentrations up to 46 μg g(-1). Due to the fact that BPA is a known endocrine disruptor and migrates from materials, regulatory restrictions have been established to prevent risks for the human health...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28526231/exposures-to-endocrine-disrupting-chemicals-in-consumer-products-a-guide-for-pediatricians
#2
Katelyn H Wong, Timur S Durrani
Endocrine disrupting chemicals, a group of exogenous chemicals that can interfere with hormone action in the body, have been implicated in disrupting endocrine function, which negatively affects human health and development. Endocrine disrupting chemicals are ubiquitously detected in consumer products, foods, beverages, personal care products, and household cleaning products. Due to concerns about their negative effects on human health, several professional health provider societies have recommended the reduction of common endocrine disrupting chemical exposures...
May 16, 2017: Current Problems in Pediatric and Adolescent Health Care
https://www.readbyqxmd.com/read/28526030/prenatal-bisphenol-a-exposure-and-dysregulation-of-infant-hypothalamic-pituitary-adrenal-axis-function-findings-from-the-apron-cohort-study
#3
Gerald F Giesbrecht, Maede Ejaredar, Jiaying Liu, Jenna Thomas, Nicole Letourneau, Tavis Campbell, Jonathan W Martin, Deborah Dewey
BACKGROUND: Animal models show that prenatal bisphenol A (BPA) exposure leads to sexually dimorphic disruption of the neuroendocrine system in offspring, including the hypothalamic-pituitary-adrenal (HPA) neuroendocrine system, but human data are lacking. In humans, prenatal BPA exposure is associated with sex-specific behavioural problems in children, and HPA axis dysregulation may be a biological mechanism. The objective of the current study was to examine sex differences in associations between prenatal maternal urinary BPA concentration and HPA axis function in 3 month old infants...
May 19, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28525533/phenol-concentrations-during-childhood-and-subsequent-measures-of-adiposity-among-young-girls
#4
Andrea L Deierlein, Mary S Wolff, Ashley Pajak, Susan M Pinney, Gayle C Windham, Maida P Galvez, Michael Rybak, Antonia M Calafat, Lawrence H Kushi, Frank M Biro, Susan L Teitelbaum
Phenolic compounds represent a class of environmental chemicals with potential endocrine disrupting capabilities. We investigated longitudinal associations of childhood exposures to phenols, from both man-made and natural sources, and subsequent measures of adiposity among girls enrolled in The Breast Cancer and Environment Research Program, 2004-2007. Baseline (ages 6-8 years) urinary concentrations were obtained for creatinine and phenol metabolites: enterolactone, genistein, daidzein, benzophenone-3, bisphenol A, sum of parabens (methyl, ethyl, and propyl parabens), 2,5-dichlorophenol, and triclosan...
May 19, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28521190/simultaneous-determination-of-bisphenol-a-and-estrogens-in-hair-samples-by-liquid-chromatography-electrospray-tandem-mass-spectrometry
#5
Chaelin Lee, Chong Hyeak Kim, Sunghwan Kim, Sung-Hee Cho
Bisphenol A (BPA), an endocrine disrupter, is widely used to make chemicals for polycarbonate, plastics, beverage containers, epoxy resins, and cash register receipts. BPA is one of the known xenoestrogens, which have weak estrogenic activity and cause obesity, diabetes, breast cancer, and reproductive disorders. Even though the concentration level of metabolomes in hair is usually lower than that in urine and blood, there are several reasons why we chose to use hair samples. First, the sampling procedure of hairs is simple...
May 11, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28521160/evidence-for-bisphenol-a-induced-disruption-of-maternal-thyroid-homeostasis-in-the-pregnant-ewe-at-low-level-representative-of-human-exposure
#6
Davy Guignard, Véronique Gayrard, Marlène Z Lacroix, Sylvie Puel, Nicole Picard-Hagen, Catherine Viguié
Many uncertainties remain regarding the potential of bisphenol A (BPA) as a thyroid disruptor in mammals and the relevance of experimental data to humans. The relevance of the exposure schemes used in experimental in vivo studies is also a major source of uncertainty when analysing the risk of BPA exposure for human health. In this context, the goals of our study, conducted in an ovine model relevant to human gestation and thyroid physiologies, were to: 1) determine the equivalence of subcutaneous and dietary exposures and 2) determine if environmentally relevant doses of BPA can alter gestational and newborn thyroid functions...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28516806/is-bisphenol-a-exposure-associated-with-the-development-of-glucose-intolerance-and-increased-insulin-resistance-in-thais
#7
La-Or Chailurkit, Pechngam Tengpraettanakorn, Suwannee Chanprasertyotin, Boonsong Ongphiphadhanakul
Bisphenol A (BPA), the monomeric component of polycarbonate plastics, reportedly possesses endocrine-disrupting effects. Exposure to low levels of BPA during more vulnerable periods leads to abnormalities related to sexual development in experimental animals. Moreover, recently a few epidemiological studies in Caucasians have demonstrated the association of BPA exposure with type 2 diabetes. Therefore, in the present study we examined the association of BPA exposure and abnormal glucose tolerance in Thais. This is a cross-sectional study of 240 participants aged at least 50 years, randomly selected by computer-generated random numbers within each glucose tolerance status from an oral glucose tolerance study of 661 participants...
January 1, 2017: Nutrition and Health
https://www.readbyqxmd.com/read/28512708/titanium-dioxide-based-sonophotocatalytic-mineralization-of-bisphenol-a-and-its-intermediates
#8
Sharmini Sunasee, Kien Tiek Wong, Gooyong Lee, Saravanan Pichiah, Shaliza Ibrahim, Chulhwan Park, Nam Chan Kim, Yeomin Yoon, Min Jang
In this study, bisphenol A (BPA) removal by sonophotocatalysis coupled with commercially available titanium dioxide (TiO2, P25) was assessed in batch tests using energy-based advanced oxidation combining ultrasound (US) and ultraviolet (UV). The kinetics of BPA removal were systematically evaluated by changing operational parameters, such as US frequency and power, mechanical stirring speed, and temperature, but also comparison of single and coupled systems under the optimum US conditions (35 kHz, 50 W, 300 rpm stirring speed, and 20 °C)...
May 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28511354/occurrence-distribution-and-sources-of-bisphenol-analogues-in-a-shallow-chinese-freshwater-lake-taihu-lake-implications-for-ecological-and-human-health-risk
#9
Yanhua Liu, Shenghu Zhang, Ninghui Song, Ruixin Guo, Meihong Chen, Dina Mai, Zhengyu Yan, Zhihua Han, Jianqiu Chen
Since the production and use of BPA were regulated in China around 2008, several bisphenol analogues were widely used to substitute BPA in the manufacture of polycarbonates, epoxy resins, and plastics. However, there is limited understanding of the spatial distribution, potential sources and risk assessment for those bisphenol analogues. In this study, seven bisphenol analogues were investigated in water and sediment samples from Taihu Lake, China. Compared to the same lake in 2013 (range: 5.4-87ng/L for waters and 0...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28511040/removal-of-selected-ppcps-edcs-and-antibiotic-resistance-genes-in-landfill-leachate-by-a-full-scale-constructed-wetlands-system
#10
Xinzhu Yi, Ngoc Han Tran, Tingru Yin, Yiliang He, Karina Yew-Hoong Gin
Landfill leachate could be a significant source of emerging contaminants (ECs) and antibiotic resistance genes (ARGs) into the environment. This study provides the first information on the occurrence of selected ECs and ARGs in raw leachate from 16-year old closed landfill site in Singapore. Among the investigated ECs, acetaminophen (ACT), bisphenol A (BPA), clofibric acid (CA), caffeine (CF), crotamiton (CTMT), diclofenac (DCF), N,N-diethyl-m-toluamide (DEET), gemfibrozil (GFZ), lincomycin (LIN), salicylic acid (SA), and sulfamethazine (SMZ) were the most frequently detected compounds in raw landfill leachate...
May 8, 2017: Water Research
https://www.readbyqxmd.com/read/28505529/influence-of-bisphenol-a-on-the-transport-and-deposition-behaviors-of-bacteria-in-quartz-sand
#11
Dan Wu, Lei He, Ruonan Sun, Meiping Tong, Hyunjung Kim
The influence of Bisphenol A (BPA) on the transport and deposition behaviors of bacteria in quartz sand was examined in both NaCl (10 and 25 mM) and CaCl2 solutions (1.2 and 5 mM) by comparing the breakthrough curves and retained profiles of cell with BPA in suspensions versus those without BPA. Gram-negative Escherichia coli and Gram-positive Bacillus subtilis were employed as model cells in the present study. The extended Derjaguin-Landau-Verwey-Overbeek interaction energy calculation revealed that the presence of BPA in cell suspensions led to a lower repulsive interaction between the cells and the quartz sand...
May 7, 2017: Water Research
https://www.readbyqxmd.com/read/28505145/dna-methylation-targets-influenced-by-bisphenol-a-and-or-genistein-are-associated-with-survival-outcomes-in-breast-cancer-patients
#12
Rohit R Jadhav, Julia Santucci-Pereira, Yao V Wang, Joseph Liu, Theresa D Nguyen, Jun Wang, Sarah Jenkins, Jose Russo, Tim H-M Huang, Victor X Jin, Coral A Lamartiniere
Early postnatal exposures to Bisphenol A (BPA) and genistein (GEN) have been reported to predispose for and against mammary cancer, respectively, in adult rats. Since the changes in cancer susceptibility occurs in the absence of the original chemical exposure, we have investigated the potential of epigenetics to account for these changes. DNA methylation studies reveal that prepubertal BPA exposure alters signaling pathways that contribute to carcinogenesis. Prepubertal exposure to GEN and BPA + GEN revealed pathways involved in maintenance of cellular function, indicating that the presence of GEN either reduces or counters some of the alterations caused by the carcinogenic properties of BPA...
May 15, 2017: Genes
https://www.readbyqxmd.com/read/28503266/inhalation-toxicity-of-bisphenol-a-and-its-effect-on-estrous-cycle-spatial-learning-and-memory-in-rats-upon-whole-body-exposure
#13
Yong Hyun Chung, Jeong Hee Han, Sung-Bae Lee, Yong-Hoon Lee
Bisphenol A (BPA) is a monomer used in a polymerization reaction in the production of polycarbonate plastics. It has been used in many consumer products, including plastics, polyvinyl chloride, food packaging, dental sealants, and thermal receipts. However, there is little information available on the inhalation toxicity of BPA. Therefore, the aim of this study was to determine its inhalation toxicity and effects on the estrous cycle, spatial learning, and memory. Sprague-Dawley rats were exposed to 0, 10, 30, and 90 mg/m(3) BPA, 6 hr/day, 5 days/week for 8 weeks via whole-body inhalation...
April 2017: Toxicological Research
https://www.readbyqxmd.com/read/28502780/biodegradation-of-endocrine-disruptors-in-urban-wastewater-using-pleurotus-ostreatus-bioreactor
#14
Zdena Křesinová, Lucie Linhartová, Alena Filipová, Martin Ezechiáš, Pavel Mašín, Tomáš Cajthaml
The white rot fungus Pleurotus ostreatus HK 35, which is also an edible industrial mushroom commonly cultivated in farms, was tested in the degradation of typical representatives of endocrine disrupters (EDCs; bisphenol A, estrone, 17β-estradiol, estriol, 17α-ethinylestradiol, triclosan and 4-n-nonylphenol); its degradation efficiency under model laboratory conditions was greater than 90% within 12 days and better than that of another published strain P. ostreatus 3004. A spent mushroom substrate from a local farm was tested for its applicability in various batch and trickle-bed reactors in degrading EDCs in model fortified and real communal wastewater...
May 11, 2017: New Biotechnology
https://www.readbyqxmd.com/read/28501790/obesity-aggravates-toxic-effect-of-bpa-on-spermatogenesis
#15
Weiyue Hu, Tianyu Dong, Lingling Wang, Quanquan Guan, Ling Song, Daozhen Chen, Zuomin Zhou, Minjian Chen, Yankai Xia, Xinru Wang
Both bisphenol A (BPA) and obesity affect male reproductive system. However, whether there is an interaction between them remains poorly understood. The aim of the present study was to evaluate the interaction between BPA exposure and obesity on semen quality and elucidate the mechanism in humans and animals. We firstly analyzed the interaction on semen volume, sperm count per ejaculate, sperm concentration and sperm motility in 357 men, and found that urinary BPA concentration was significantly correlated with sperm count per ejaculate in obese men (β=-34...
May 11, 2017: Environment International
https://www.readbyqxmd.com/read/28501544/the-dna-methylation-status-alteration-of-two-steroidogenic-genes-in-gonads-of-rare-minnow-after-bisphenol-a-exposure
#16
Ting Zhang, Yan Liu, Hong Chen, Jiancao Gao, Yingying Zhang, Cong Yuan, Zaizhao Wang
Both cytochrome P450c17 (CYP17A1) and P-450 side chain cleavage (CYP11A1) play important roles in steroid biosynthesis. According to our previous studies, bisphenol A (BPA) could regulate the mRNA expression of cyp17a1 and cyp11a1 in rare minnow Gobiocypris rarus. However, the potential mechanism of the regulation is barely understood. In the present study, aiming to explore how BPA affects the mRNA expression of cyp17a1 and cyp11a1 in testes and ovaries of G. rarus, we firstly cloned 340-bp fragment of 5' flanking region of cyp11a1 and then detected the methylation level of CpG loci involved in 5' flanking of cyp11a1 and cyp17a1 and their mRNA expression levels...
May 10, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/28501355/sono-photo-fenton-oxidation-of-bisphenol-a-over-a-lafeo3-perovskite-catalyst
#17
Meral Dükkancı
In this study, oxidation of bisphenol-A (IUPAC name - 2,2-(4,4-dihydroxyphenyl, BPA), which is an endocrine disrupting phenolic compound used in the polycarbonate plastic and epoxy resin industry, was investigated using sono-photo-Fenton process under visible light irradiation in the presence of an iron containing perovskite catalyst, LaFeO3. The catalyst prepared by sol-gel method, calcined at 500°C showed a catalytic activity in BPA oxidation using sono-photo-Fenton process with a degradation degree and a chemical oxygen demand (COD) reduction of 21...
May 5, 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28500084/bisphenol-a-promotes-hepatic-lipid-deposition-involving-kupffer-cell-m1-polarization-in-male-mice
#18
Qiong Lv, Rufei Gao, Chuan Peng, Juan Yi, Lulu Liu, Shumin Yang, Danting Li, Jinbo Hu, Ting Luo, Mei Mei, Ying Song, Chaodong Wu, Xiaoqiu Xiao, Qifu Li
Bisphenol A (BPA), as one of the most common environmental endocrine disruptors, is considered to promote hepatic lipid deposition, but the mechanisms has not been fully elucidated. The polarization of Kupffer cells (KCs) plays an important role in hepatic inflammation by promoting pro-inflammatory M1 phenotype (M1KCs), which contributes to dysregulated lipid metabolism. The purpose of this study is to investigate the role of KC polarization in BPA-induced hepatosteatosis in male mice. In this study, we examined hepatic lipid contents and quantified M1KC in BPA-treated CD1 mice, and further explored the interaction between KCs and hepatocytes by using conditional HepG2 cell culture...
May 12, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28499613/effects-of-bisphenol-a-on-incidence-and-severity-of-cardiac-lesions-in-the-nctr-sprague-dawley-rat-a-clarity-bpa-study
#19
Robin Gear, Jessica A Kendziorski, Scott M Belcher
The goal of this study was to determine whether bisphenol A (BPA) had adverse effects indicative of cardiac toxicity. As part of the "Consortium Linking Academic and Regulatory Insights on BPA Toxicity" (CLARITY-BPA), study dams and offspring were exposed by daily gavage to five doses of BPA ranging from 2.5 to 25000μg/kg/day, 0.05 or 0.5μg/kg/day 17α-ethinyl-estradiol (EE) or 0.3% carboxymethylcellulose vehicle. Exposure-related effects were analyzed in isolated hearts by quantitative morphometry and histopathology...
May 9, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28498545/fluorogenic-sensing-of-carcinogenic-bisphenol-a-using-aptamer-capped-mesoporous-silica-nanoparticles
#20
Angela Ribes, Elena Aznar, Andrea Bernardos, Maria D Marcos, Pedro Amorós, Ramón Martínez-Máñez, Felix Sancenon
Mesoporous silica nanoparticles loaded with rhodamine B and capped with a bisphenol A aptamer were used for the selective and sensitive detection of this lethal chemical. The pores of the nanoparticles are selectively opened in the presence of bisphenol A (through its selective coordination with the grafted aptamer) with subsequent rhodamine B delivery. With this capped material a limit of detection as low as 3.5 M of bisphenol A was measured.
May 12, 2017: Chemistry: a European Journal
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