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https://www.readbyqxmd.com/read/28921615/plasticizer-di-2-ethylhexyl-phthalate-interferes-with-osteoblastogenesis-and-adipogenesis-in-a-mouse-model
#1
Chen-Yuan Chiu, Shih-Chun Sun, Chih-Kang Chiang, Ching-Chia Wang, Ding-Cheng Chan, Huang-Jen Chen, Shing-Hwa Liu, Rong-Sen Yang
Plasticizer di(2-ethylhexyl)phthalate (DEHP) can leach from medical devices such as blood storage bags and the tubing. Recently, epidemiological studies showed that phthalate metabolites levels in the urine are associated with low bone mineral density (BMD) in older women. The detailed effect and mechanism of DEHP on osteoblastogenesis and adipogenesis and bone loss remain to be clarified. Here, we investigated the effect and mechanism of DEHP and its active metabolite mono(2 -ethylhexyl)phthalate (MEHP) on osteoblastogenesis and adipogenesis...
September 16, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28919491/potential-involvement-of-fgf10-fgfr2-and-androgen-receptor-ar-in-renal-fibrosis-in-adult-male-rat-offspring-subjected-to-prenatal-exposure-to-di-n-butyl-phthalate-dbp
#2
Wen-Lan Sun, Yi-Ping Zhu, Xiu-Shi Ni, Da-Dao Jing, Yu-Ting Yao, Wei Ding, Zhi-Hong Liu, Guo-Xian Ding, Jun-Tao Jiang
BACKGROUND: We previously demonstrated that maternal exposure to di-n-butyl phthalate (DBP) induces dysplasia of the kidney in newborn male offspring and renal fibrosis in adults. But the underlying mechanisms remain elusive. Fgf10/Fgfr2 and androgen receptor (AR) are known to be important for renal development. We therefore investigated whether these genes are involved in DBP-induced renal fibrosis. MATERIALS AND METHODS: Using Sprague-Dawley rats and rat renal proximal tubular cells (NRK52E), we determined the potential involvement of Fgf10, Fgfr2 and AR in DBP-induced renal fibrosis...
September 14, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28919451/biphasic-modulation-of-neuro-and-interrenal-steroidogenesis-in-juvenile-african-sharptooth-catfish-clarias-gariepinus-exposed-to-waterborne-di-2-ethylhexyl-phthalate
#3
Augustine Arukwe, Oju R Ibor, Aina O Adeogun
Receptor (i.e genomic) and non-receptor (or non-genomic) effects of endocrine toxicology have received limited or almost non-existent attention for tropical species and regions. In the present study, we have studied the effects of di-(2-ethylhexyl) phthalate (DEHP) on neuro- and interrenal steroidogenesis of the African catfish (Clarias gariepinus) using molecular, immunochemical and physiological approaches. Juvenile fish (mean weight and length: 5.6 ± 0.6g and 8.2 ± 1.2 cm, respectively), were randomly distributed into ten 120 L rectangular glass tanks containing 60 L of dechlorinated tap water, at 50 fish per exposure group...
September 14, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28918855/ion-pair-in-tube-solid-phase-microextraction-for-the-simultaneous-determination-of-phthalates-and-their-degradation-products-in-atmospheric-particulate-matter
#4
M Fernández-Amado, M C Prieto-Blanco, P López-Mahía, S Muniategui-Lorenzo, D Prada-Rodríguez
An in-tube solid phase microextraction, coupled with high-performance liquid chromatography with diode array detection (IT-SPME-HPLC-DAD) method, has been developed for the simultaneous determination of 13 diesters (from dimethyl to dioctylphthalate plus diisobutyl, benzylbutyl, di-2-ethylhexyl, diisononyl and diisodecylphthalate) and 2 monoesters of phthalic acid (mono-butyl and mono-(2-ethylhexyl) phthalate) in particulate matter (PM10). Triethylamine at pH=3 was used as an ion-pair reagent with a double function, of regulating the chromatographic retention of the monoesters and the most hydrophilic diesters on a monolithic silica column, and of improving their extraction on a porous polymer with divinylbenzene-4-vinylpyridine capillary...
September 6, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28916131/chemical-exposures-in-recently-renovated-low-income-housing-influence-of-building-materials-and-occupant-activities
#5
Robin E Dodson, Julia O Udesky, Meryl D Colton, Martha McCauley, David E Camann, Alice Y Yau, Gary Adamkiewicz, Ruthann A Rudel
Health disparities in low-income communities may be linked to residential exposures to chemicals infiltrating from the outdoors and characteristics of and sources in the home. Indoor sources comprise those introduced by the occupant as well as releases from building materials. To examine the impact of renovation on indoor pollutants levels and to classify chemicals by predominant indoor sources, we collected indoor air and surface wipes from newly renovated "green" low-income housing units in Boston before and after occupancy...
August 14, 2017: Environment International
https://www.readbyqxmd.com/read/28915543/effects-of-diisononyl-phthalate-on-danio-rerio-reproduction
#6
Stefania Santangeli, Francesca Maradonna, Maya Zanardini, Valentina Notarstefano, Giorgia Gioacchini, Isabel Forner-Piquer, Hamid Habibi, Oliana Carnevali
Di-isononyl phthalate (DiNP) is a high molecular weight phthalate commonly used as a plasticizer. It was introduced as a replacement for bis (2-ethylhexyl) phthalate (DEHP) which is used in the production of plasticized polyvinyl chloride (PVC). The purpose of this study was to investigate for the first time the effect of DiNP on female reproductive physiology in Danio rerio. Fish were exposed to five different doses of DiNP plus control (0 μg/L; 0.42 μg/L; 4.2 μg/L; 42 μg/L; 420 μg/L; 4200 μg/L) for a period of 21 days...
September 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28915506/maternal-diethylhexyl-phthalate-exposure-affects-adiposity-and-insulin-tolerance-in-offspring-in-a-pcna-dependent-manner
#7
Brian G Hunt, Yuan-Liang Wang, Min-Shan Chen, Shao-Chun Wang, Susan E Waltz
The ubiquitous plasticizer, diethylhexyl phthalate (DEHP), is a known endocrine disruptor. However, DEHP exposure effects are not well understood. Changes in industrial and agricultural practices have resulted in increased prevalence of DEHP exposure and has coincided with the heightened occurrence of metabolic syndrome and obesity. DEHP and its metabolites are detected in the umbilical cord blood of newborns; however, the prenatal and perinatal effects of DEHP exposure have not been intensively studied. Previously, we discovered that phosphorylation (p) of proliferating cell nuclear antigen (PCNA) at tyrosine 114 (Y114) is required for adipogenesis and diet-induced obesity in mice...
September 12, 2017: Environmental Research
https://www.readbyqxmd.com/read/28915396/a-novel-biodegradation-pathway-of-the-endocrine-disruptor-di-2-ethyl-hexyl-phthalate-by-pleurotus-ostreatus-based-on-quantum-chemical-investigation
#8
Miriam Ahuactzin-Pérez, Saúl Tlecuitl-Beristain, Jorge García-Dávila, Ericka Santacruz-Juárez, Manuel González-Pérez, María Concepción Gutiérrez-Ruíz, Carmen Sánchez
Di(2-ethyl hexyl) phthalate (DEHP) is a plasticizer that interfere with endocrine systems in mammals. Growth parameters for Pleurotus ostreatus grown on media containing glucose and different concentrations of DEHP (0, 500 and 1000mg/L) were evaluated. The highest biomass production was observed in medium supplemented with 1000mg of DEHP/L. Half-life of DEHP biodegradation, biodegradation constant of DEHP, and percentage of removal efficiency (%E) were also determined. P. ostreatus degraded 100% of DEHP after 504h...
September 12, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28913550/oxidative-damage-and-genetic-toxicity-induced-by-dbp-in-earthworms-eisenia-fetida
#9
Guanying Wang, Jun Wang, Lusheng Zhu, Jinhua Wang, Hengzhou Li, Yizhang Zhang, Wenjun Liu, Jianpeng Gao
Di-n-butyl phthalate (DBP) is one of the most ubiquitous plasticizers used worldwide. However, it has negatives effects on the soil, water, atmosphere, and other environmental media and can cause serious pollution. According to the artificial soil test and previous studies, this study was conducted to evaluate the toxicity of earthworms induced by DBP at different concentrations (0, 0.1, 1.0, 10, and 50 mg kg(-1)) on the 7th, 14th, 21st, and 28th days of exposure. The variations in the antioxidant activities of enzymes, such as catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), and glutathione-S-transferase (GST), in the amounts of malondialdehyde (MDA) and reactive oxygen species (ROS) and in the amount of DNA damage were measured to evaluate the toxic impact of DBP in earthworms...
September 14, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28898977/from-the-cover-metabolomics-reveals-a-role-of-betaine-in-prenatal-dbp-exposure-induced-epigenetic-transgenerational-failure-of-spermatogenesis-in-rats
#10
Beilei Yuan, Wei Wu, Minjian Chen, Hao Gu, Qiuqin Tang, Dan Guo, Ting Chen, Yiqiu Chen, Chuncheng Lu, Ling Song, Yankai Xia, Daozhen Chen, Virender K Rehan, Jiahao Sha, Xinru Wang
There is increasing concern that early-life exposure to endocrine disruptors affects male offspring reproduction. However, whether di-n-butyl phthalate (DBP), a widely used endocrine disruptor, has transgenerational effects and, if so, the exact underlying molecular mechanisms involved remain unknown. In our study, 5 of time-mated pregnant SD rats were exposed to 0 and 500 mg/kg DBP with corn oil as the vehicle via oral gavage from embryonic days (E8-E14). Epigenetic and metabolomic of testis were analyzed after post-natal 60 days...
August 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28898934/the-associations-between-phthalate-exposure-and-insulin-resistance-%C3%AE-cell-function-and-blood-glucose-control-in-a-population-based-sample
#11
Robert Edgar Dales, Lisa Marie Kauri, Sabit Cakmak
In developed countries, phthalate exposure is ubiquitous. Previous studies have shown an association between phthalate levels and health effects. To test associations between phthalate exposures, estimated from urinary phthalate metabolites, and insulin resistance, β-cell function and glucose control. Data were obtained from a cross-sectional, nationally representative study; the Canadian Health Measures Survey (CHMS, 2009-2011). Participants under the age of 12, those with diabetes, who were pregnant or who had not fasted overnight were excluded...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28898803/cytotoxic-effects-of-commonly-used-nanomaterials-and-microplastics-on-cerebral-and-epithelial-human-cells
#12
Gabriella F Schirinzi, Ignacio Pérez-Pomeda, Josep Sanchís, Cesare Rossini, Marinella Farré, Damià Barceló
Plastic wastes are among the major inputs of detritus into aquatic ecosystems. Also, during recent years the increasing use of new materials such as nanomaterials (NMs) in industrial and household applications has contributed to the complexity of waste mixtures in aquatic systems. The current effects and the synergism and antagonisms of mixtures of microplastics (MPLs), NMs and organic compounds on the environment and in human health have, to date, not been well understood but instead they are a cause for general concern...
September 9, 2017: Environmental Research
https://www.readbyqxmd.com/read/28895924/artificial-turf-contested-terrains-for-precautionary-public-health-with-particular-reference-to-europe
#13
Andrew Watterson
Millions of adults, children and teenagers use artificial sports pitches and playgrounds globally. Pitches are artificial grass and bases may be made up of crumb rubber from recycled tires or new rubber and sand. Player injury on pitches was a major concern. Now, debates about health focus on possible exposure and uptake of chemicals within pitch and base materials. Research has looked at potential risks to users from hazardous substances such as metals, volatile organic compounds, polycyclic aromatic hydrocarbons including benzo (a) (e) pyrenes and phthalates: some are carcinogens and others may be endocrine disruptors and have developmental reproductive effects...
September 12, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28894896/-hypospadias-insights-and-challenges
#14
I Rübben, R Stein
Disorders of the ventral tubularization of the urethra, such as the hypospadias, are among the second most frequent congenital childhood malformations. An increasing incidence has been observed suggesting a doubling in the US, which could not be documented for the European area. The underlying causes of this congenital defect remain unidentified. Genetic risk constellations or environmental influences, in particular by so-called endocrine disrupting chemicals (EDCs), are discussed as triggering factors. Boys after in vitro fertilization are more likely to have hypospadias than in nonreproductive-assisted pregnancies...
September 11, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/28894178/effect-of-prenatal-dinch-plasticizer-exposure-on-rat-offspring-testicular-function-and-metabolism
#15
Enrico Campioli, Sunghoon Lee, Matthew Lau, Lucas Marques, Vassilios Papadopoulos
In 2002, the plasticizer 1,2-cyclohexane dicarboxylic acid diisononyl ester (DINCH) was introduced in the European market as a substitute for endocrine-disrupting phthalates. We found that in utero exposure of rats to DINCH from gestational day 14 until parturition affected reproductive organ physiology and reduced circulating testosterone levels at post-natal day 60, indicating a long-term effect on Leydig cells of the testis. Metabolically, animals exhibited randomly increased serum glucose concentrations not associated with impaired glucose utilization...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893586/effects-of-diisononyl-phthalate-on-osteopenia-in-intact-mice
#16
Yun-Ho Hwang, Young-Jin Son, Man-Jeong Paik, Sung-Tae Yee
Osteopenia is characterized by bone loss and deterioration of trabecular bone, which leads to osteoporotic fractures. This disease is highly prevalent in industrialized areas and is associated with exposure to endocrine disrupting chemicals (EDCs). Diisononyl phthalate (DINP) is one of these EDCs and is mainly used as a plasticizer in flexible polyvinyl chloride (PVC) products. Although it is well known that exposure to DINP is harmful to humans, no studies have been reported concerning its contribution to osteopenia...
September 8, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28892847/relationship-between-maternal-phthalate-exposure-and-offspring-size-at-birth
#17
Yingshuang Zhu, Yanjian Wan, Bin Zhang, Aifen Zhou, Wenqian Huo, Chuansha Wu, Hongxiu Liu, Yangqian Jiang, Zong Chen, Minmin Jiang, Yang Peng, Shunqing Xu, Wei Xia, Yuanyuan Li
Research findings on effects of prenatal phthalate exposure on fetal growth were inconsistent. Increasing evidence from animal studies has indicated a potential sex-specific effect of phthalates on fetal growth, but the current human data was limited. In this study, we aimed to estimate the relationships between maternal phthalate exposure and infant birth size. Six major phthalate metabolite levels of urine samples were measured among pregnant women (n=1002) from the Healthy Baby Cohort (HBC), China. The associations between urinary phthalate metabolites levels and birth size (birth weight, birth length, birth weight z-scores and ponderal index) were estimated using linear regression models...
September 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28890219/use-of-monte-carlo-analysis-in-a-risk-based-prioritization-of-toxic-constituents-in-house-dust
#18
Gary L Ginsberg, Giuliana Belleggia
Many chemicals have been detected in house dust with exposures to the general public and particularly young children of potential health concern. House dust is also an indicator of chemicals present in consumer products and the built environment that may constitute a health risk. The current analysis compiles a database of recent house dust concentrations from the United States and Canada, focusing upon semi-volatile constituents. Seven constituents from the phthalate and flame retardant categories were selected for risk-based screening and prioritization: diethylhexyl phthalate (DEHP), butyl benzyl phthalate (BBzP), diisononyl phthalate (DINP), a pentabrominated diphenyl ether congener (BDE-99), hexabromocyclododecane (HBCDD), tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) and tris(2-chloroethyl) phosphate (TCEP)...
September 7, 2017: Environment International
https://www.readbyqxmd.com/read/28889278/endocrine-disrupting-compounds-from-the-source-water-of-the-huai-river-huainan-city-china
#19
Siping Niu, Cunliang Zhang
The occurrence and environmental risk of eight endocrine disrupting compounds (EDCs), namely dimethyl phthalate (DMP), diethyl phthalate (DEP), benzyl butyl phthalate (BBP), dibutyl phthalate (DBP), nonyl phenol (NP), bisphenol A (BPA), 17α-ethinylestradiol (EE2) and estrone (E1), from four water sources (Pingshantou, Wanfenggang, Shisi, and Shiyi) of Huai River (Huainan section) were investigated in this study. Except for DMP only found in Pingshantou, all of the selected EDCs existed widely in the source water...
September 9, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28886917/effects-of-the-phthalate-exposure-during-three-gestation-periods-on-birth-weight-and-their-gender-differences-a-birth-cohort-study-in-china
#20
Yun-Wei Zhang, Hui Gao, Lei-Jing Mao, Xing-Yong Tao, Xing Ge, Kun Huang, Peng Zhu, Jia-Hu Hao, Qu-Nan Wang, Yuan-Yuan Xu, Zhong-Xiu Jin, Jie Sheng, Ye-Qing Xu, Shuang-Qin Yan, Xu-Guang Tao, Fang-Biao Tao
Phthalate has been widely used as a type of plasticiser in various consuming products in daily life. Recent studies have suggested that prenatal phthalate exposure may have adverse effects on fetal development. We aimed to identify the effects of in utero phthalate exposure on birth weight (BW). We evaluated a birth cohort comprising 3474 pregnant women and their single infants; 3103, 2975 and 2838 urine samples were collected in the first, second and third trimesters, respectively. Phthalate metabolites included monomethyl phthalate (MMP), monoethyl phthalate (MEP), mono-n-butyl phthalate (MBP), monobenzyl phthalate (MBzP), mono-(2-ethylhexyl) phthalate (MEHP), mono-(2-ethyl-5-oxohexyl) phthalate (MEHHP), and mono-(2-ethyl-5-hydroxylhexyl) phthalate (MEOHP), which were analysed in the urine by using high performance liquid chromatography-tandem mass spectrometry...
September 5, 2017: Science of the Total Environment
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