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https://www.readbyqxmd.com/read/28440430/perfluorooctanoic-acid-induces-oxidative-damage-and-mitochondrial-dysfunction-in-pancreatic-%C3%AE-cells
#1
Kwang Sik Suh, Eun Mi Choi, Yu Jin Kim, Soo Min Hong, So Yong Park, Sang Youl Rhee, Seungjoon Oh, Sung Woon Kim, Youngmi Kim Pak, Wonchae Choe, Suk Chon
Several environmental contaminants have been linked to the development of diabetes and increased diabetes‑associated mortality. Perfluorooctanoic acid (PFOA) is a widely used perfluoroalkane found in surfactants and lubricants, and in processing aids used in the production of polymers. Furthermore, PFOA has been detected in humans, wildlife and the environment. The present study investigated the toxic effects of PFOA on rat pancreatic β‑cell‑derived RIN‑m5F cells. Cell viability, apoptosis, reactive oxygen and nitrogen species, cytokine release and mitochondrial parameters, including membrane potential collapse, reduced adenosine triphosphate levels, cardiolipin peroxidation and cytochrome c release were assessed...
April 11, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28434222/isomer-specific-transplacental-transfer-of-perfluoroalkyl-acids-results-from-a-survey-of-paired-maternal-cord-sera-and-placentas
#2
Fangfang Chen, Shanshan Yin, Barry C Kelly, Weiping Liu
Currently, information regarding isomer-specific concentrations of PFHxS, PFOS, and PFOA in human placenta, and corresponding placental-maternal ratios (RPM) of these compounds does not exist. The objective of the present study was to assess the occurrence, and distribution of different PFHxS, PFOS and PFOA isomers in maternal serum, umbilical cord serum and placenta to gain a better understanding of transplacental transport efficiency and prenatal exposure risks. The study involved quantitative determination of isomer-specific concentrations of PFHxS, PFOS and PFOA in samples of maternal serum (n = 32), cord serum (n = 32) and placenta (n = 32) from pregnant women in Wuhan, China...
April 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28431976/the-impact-of-exposure-to-environmental-contaminant-on-hepatocellular-lipid-metabolism
#3
Zongguang Hui, Rujiang Li, Li Chen
Increasing evidences show that ubiquitous perfluorooctanoic acid (PFOA), a representative environmental pollutant, is found to be linked to lipid dysmetabolism. However, the biological mechanism behind this outcome remains uninvestigated. In the present study, we established the PFOA-injured liver in mice to explore the underlying mechanism associated with PFOA-induced lipid disturbance in the liver via a group of biochemical and molecular assays. As results, PFOA-exposed mice showed increased transaminase (ALT), reduced triglyceride and free fatty acid contents in serum, as well as elevated level of hepatic triglyceride...
April 18, 2017: Gene
https://www.readbyqxmd.com/read/28426990/concentration-of-perfluorinated-compounds-and-cotinine-in-human-foetal-organs-placenta-and-maternal-plasma
#4
Linn Salto Mamsen, Bo A G Jönsson, Christian H Lindh, Rasmus H Olesen, Agnete Larsen, Erik Ernst, Thomas W Kelsey, Claus Yding Andersen
BACKGROUND: Perfluoroalkyl substances (PFASs) are bio-accumulative pollutants, and prenatal exposure to PFASs is believed to impact human foetal development and may have long-term adverse health effects later in life. Additionally, maternal cigarette smoking may be associated with PFAS levels. Foetal exposure has previously been estimated from umbilical cord plasma, but the actual concentration in foetal organs has never been measured. OBJECTIVES: The concentrations of 5 PFASs and cotinine - the primary metabolite of nicotine - were measured in human foetuses, placentas, and maternal plasma to evaluate to what extent these compounds were transferred from mother to foetus and to determine if the PFAS concentrations were associated with maternal cigarette smoking...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28418092/atmospheric-chlorinated-polyfluorinated-ether-sulfonate-and-ionic-perfluoroalkyl-acids-in-2006-to-2014-in-dalian-china
#5
Wei Liu, Hui Qin, Jingwen Li, Qian Zhang, Huanhuan Zhang, Zaoshi Wang, Xin He
Chlorinated polyfluorinated ether sulfonate (Cl-PFESA; trade name F-53B) is an alternative product for perfluorooctane sulfonate (PFOS) used in metal plating; little is known about its levels in the environment and its risks. To our knowledge, the present study constitutes the first report of Cl-PFESA in the atmosphere. In 2006 to 2014, C8 Cl-PFESA, along with ionic perfluoroalkyl acids (PFAAs), was detected in atmospheric particulate matter in Dalian, China. Concentrations of C8 Cl-PFESA increased from 140 pg/m(3) in 2007 to 722 pg/m(3) in 2014...
April 18, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28411540/mechanism-insight-of-pfoa-degradation-by-zno-assisted-photocatalytic-ozonation-efficiency-and-intermediates
#6
Dan Wu, Xukai Li, Yiming Tang, Ping Lu, Weirui Chen, Xiaoting Xu, Laisheng Li
Zinc oxide (ZnO) nanorods were prepared by a directly pyrolysis method and employed as catalyst for perfluorooctanoic acid (PFOA) degradation. Comparative experiments were conducted to discuss the catalytic activity and flexibility of ZnO. After ZnO addition, the best PFOA degradation efficiency (70.5%) was achieved by ZnO/UV/O3 system, only 9.5% by sole ozonation and 18.2% by UV254 light irradiation. PFOA degradation was sensitive with pH value and temperature. The better PFOA removal efficiency was achieved at acidic condition...
April 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28411449/prenatal-concentrations-of-perfluoroalkyl-substances-and-early-communication-development-in-british-girls
#7
Zuha Jeddy, Terryl J Hartman, Ethel V Taylor, Cayla Poteete, Katarzyna Kordas
Perfluoroalkyl substances (PFAS), found in many household products and classed as endocrine disrupting chemicals, can be transferred through the placenta and are associated with multiple developmental deficits in offspring. Using data from the Avon Longitudinal Study of Parents and Children (ALSPAC), we investigated the association between intrauterine exposure to PFAS and early communication development in 432 mother-daughter dyads at 15 and 38months of age. Concentrations of perfluorooctane sulfonate (PFOS), perfluorooctanoate (PFOA), perfluorohexane sulfonate (PFHxS), and perfluorononanoate (PFNA) were measured in maternal serum collected during pregnancy...
April 12, 2017: Early Human Development
https://www.readbyqxmd.com/read/28402547/perfluorododecanoic-acid-induces-cognitive-deficit-in-adult-rats
#8
Kohei Kawabata, Hirokazu Matsuzaki, Sahoko Nukui, Mari Okazaki, Ayako Sakai, Yoichi Kawashima, Naomi Kudo
The brain level of perfluorododecanoic acid (PFDoA) was compared with those of perfluorooctanoic acid (PFOA) and perfluorodecanoic acid (PFDA) in rats 9 days after a single oral dose (50 mg/kg). The PFDoA level in the brain was 44.0 ± 2.0 [mu]g/g, which was higher than that in the serum (24.4 ± 1.0 [mu]g/ml). By contrast, the concentrations of PFOA and PFDA in the brain were low (<0.8 and 4.7 ± 0.4 [mu]g/g, respectively), and less than one-tenth of those in the serum. Next, to investigate the effects on brain function, the cognitive function alterations of PFOA, PFDA, and PFDoA were estimated by the novel object recognition test 5-6 days after dosing...
April 11, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28401367/perfluoroalkyl-acids-pfaas-in-sediments-from-rivers-of-the-pearl-river-delta-southern-china
#9
Baolin Liu, Hong Zhang, Juying Li, Weihua Dong, Liuwei Xie
Having been largely used in industrial and household products, perfluoroalkyl acids (PFAAs) appear in environmental and biological systems with prevalence and persistence and have raised great concern in recent years. The present study is aimed at studying concentrations and composition profiles of 16 PFAAs in surface sediments collected from 51 sampling locations in 4 main rivers of the Pearl River Delta, one of the economy-developed areas in China. The total PFAA concentrations (∑ PFAAs) were determined in a wide range of 1...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28392065/quantitative-bias-analysis-of-a-reported-association-between-perfluoroalkyl-substances-pfas-and-endometriosis-the-influence-of-oral-contraceptive-use
#10
Gerard Ngueta, Matthew P Longnecker, Miyoung Yoon, Christopher D Ruark, Harvey J Clewell, Melvin E Andersen, Marc-André Verner
An association between serum levels of perfluoroalkyl substances (PFAS) and endometriosis has recently been reported in an epidemiologic study. Oral contraceptive use to treat dysmenorrhea (pelvic pain associated with endometriosis) could potentially influence this association by reducing menstrual fluid loss, a route of excretion for PFAS. In this study, we aimed to evaluate the influence of differential oral contraceptive use on the association between PFAS and endometriosis. We used a published life-stage physiologically based pharmacokinetic (PBPK) model to simulate plasma levels of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from birth to age at study participation (range 18-44years)...
April 6, 2017: Environment International
https://www.readbyqxmd.com/read/28391466/perfluoroalkyl-substances-with-isomer-analysis-in-umbilical-cord-serum-in-china
#11
Ya-Zhi Zhang, Xiao-Wen Zeng, Zhengmin Min Qian, Michael G Vaughn, Sarah Dee Geiger, Li-Wen Hu, Long Lu, Chuanxi Fu, Guang-Hui Dong
Perfluoroalkyl substances (PFASs) are a class of widely used chemicals that have been detected in the environment and general population. However, the isomer patterns in human are poorly characterized. Previous studies observed the isomer-specific maternal-fetal transfer of PFASs in human. In our current study, we first examined the profile of PFASs and isomers, including 17 linear PFASs and 10 branched PFOS/PFOA isomers by using isotopic internal standards in umbilical cord serum samples from Guangzhou, China...
April 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28390306/perfluoroalkyl-substances-in-waters-along-the-grand-canal-china
#12
H T Piao, X C Jiao, N Gai, S Chen, G H Lu, X C Yin, E Yamazaki, N Yamashita, K Y Tan, Y L Yang, J Pan
The Grand Canal, also known as the Beijing-Hangzhou Grand Canal, is a UNESCO World Heritage Site and the longest canal in the world. It is an important trunk line of the South-to-North Water Diversion Project in China. The contamination status and spatial distributions of perfluoroalky substances (PFASs) in waters of the Grand Canal were investigated. The total concentrations of PFASs (∑PFASs) range from 7.8 ng/L to 218.0 ng/L, with high ∑PFASs occurring in the southern part of the Grand Canal which is located in a highly urbanized and economically developed region...
July 2017: Chemosphere
https://www.readbyqxmd.com/read/28382450/removal-of-pfoa-and-pfos-from-aqueous-solutions-using-activated-carbon-produced-from-vitis-vinifera-leaf-litter
#13
Bamidele Oladapo Fagbayigbo, Beatrice Olutoyin Opeolu, Olalekan Siyanbola Fatoki, Terresa Ayuko Akenga, Olatunde Stephen Olatunji
The removal of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) from aqueous solutions using agro-waste biomass of Vitis vinifera (grape) leaf litter was studied. Activated carbons were produced from the biomass and chemical activation achieved by using phosphoric acid (H3PO4) and potassium hydroxide (KOH) for the modification of the carbons' surface morphology. Activated carbons were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy and Brunauer-Emmett-Teller (BET) in order to understand removal mechanisms of the contaminants by activated carbons...
April 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28360000/spatial-distribution-of-organic-contaminants-in-three-rivers-of-southern-england-bound-to-suspended-particulate-material-and-dissolved-in-water
#14
John L Wilkinson, Peter S Hooda, Julian Swinden, James Barker, Stephen Barton
The spatial distribution of pharmaceuticals, personal care products (PPCPs) and other emerging contaminants (ECs) such as plasticisers, perflourinated compounds (PFCs) and illicit drug metabolites in water and bound to suspended particulate material (SPM) is not well-understood. Here, we quantify levels of thirteen selected contaminants in water (n=88) and their partition to suspended particulate material (SPM, n=16) in three previously-unstudied rivers of Greater London and Southern England during a key reproduction/spawning period...
March 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28349882/association-of-prenatal-exposure-to-perfluoroalkyl-substances-with-cord-blood-adipokines-and-birth-size-the-hokkaido-study-on-environment-and-children-s-health
#15
Machiko Minatoya, Sachiko Itoh, Chihiro Miyashita, Atsuko Araki, Seiko Sasaki, Ryu Miura, Houman Goudarzi, Yusuke Iwasaki, Reiko Kishi
Perfluoroalkyl substances (PFASs) are synthetic chemicals that persist in the environment and in humans. There is a possible association between prenatal PFASs exposure and both neonate adipokines and birth size, yet epidemiological studies are very limited. The objective of this study was to examine associations of prenatal exposure to PFASs with cord blood adipokines and birth size. We conducted birth cohort study, the Hokkaido Study. In this study, 168 mother-child pairs were included. Perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in maternal blood were determined by liquid chromatography tandem mass spectrometry...
March 27, 2017: Environmental Research
https://www.readbyqxmd.com/read/28340623/changes-in-clinical-symptoms-and-functional-disability-in-patients-with-coexisting-patellofemoral-and-tibiofemoral-osteoarthritis-a-1-year-prospective-cohort-study
#16
Hirotaka Iijima, Naoto Fukutani, Takuya Isho, Yuko Yamamoto, Masakazu Hiraoka, Kazuyuki Miyanobu, Masashi Jinnouchi, Eishi Kaneda, Tomoki Aoyama, Hiroshi Kuroki, Shuichi Matsuda
BACKGROUND: This 1-year prospective cohort study aimed to compare the changes in clinical symptoms and functional disability between patients with coexisting patellofemoral (PF) and tibiofemoral (TF) osteoarthritis (OA) and those with isolated TFOA. METHODS: Seventy-two patients with medial knee OA were enrolled. Knee pain and functional disability were assessed at baseline and at 1-year follow-up using the Japanese Knee Osteoarthritis Measure (JKOM) and a visual analog scale (VAS)...
March 24, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28340460/interactions-between-three-typical-endocrine-disrupting-chemicals-edcs-in-binary-mixtures-exposure-on-myocardial-differentiation-of-mouse-embryonic-stem-cell
#17
Ren Zhou, Wei Cheng, Yan Feng, Hongying Wei, Fan Liang, Yan Wang
In recent years, various kinds of endocrine-disrupting chemicals (EDCs) have been detected in human blood and urine. Thus, it was important to investigate the combined toxicity effect of EDCs. In the present study, we evaluated the individual and combined developmental toxicities of three classic EDCs: perfluorooctane sulfonate (PFOS), perfluorooctanoic acid (PFOA), and bisphenol A (BPA) by embryonic stem cell test (EST). The similarities and differences between combination of same chemical group as well as different chemical groups were investigated in this research...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28336137/an-ultra-sensitive-method-for-the-analysis-of-perfluorinated-alkyl-acids-in-drinking-water-using-a-column-switching-high-performance-liquid-chromatography-tandem-mass-spectrometry
#18
Kavitha Dasu, Shoji F Nakayama, Mitsuha Yoshikane, Marc A Mills, J Michael Wright, Shelley Ehrlich
In epidemiological research, it has become increasingly important to assess subjects' exposure to different classes of chemicals in multiple environmental media. It is a common practice to aliquot limited volumes of samples into smaller quantities for specific trace level chemical analyses. A novel method was developed for the determination of 14 perfluorinated alkyl acids (PFAAs) in small volumes (10mL) of drinking water using off-line solid phase extraction (SPE) pre-treatment followed by on-line pre-concentration on a WAX column before analysis on column-switching high performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS)...
March 6, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28325044/predictors-of-per-and-polyfluoroalkyl-substance-pfas-plasma-concentrations-in-6-10-year-old-american-children
#19
Maria H Harris, Sheryl L Rifas-Shiman, Antonia M Calafat, Xiaoyun Ye, Ana Maria Mora, Thomas F Webster, Emily Oken, Sharon K Sagiv
Certain per- and polyfluoroalkyl substances (PFASs) are suspected developmental toxicants, but data on PFAS concentrations and exposure routes in children are limited. We measured plasma PFASs in children aged 6-10 years from the Boston-area Project Viva prebirth cohort, and used multivariable linear regression to estimate associations with sociodemographic, behavioral, and health-related factors, and maternal PFASs measured during pregnancy. PFAS concentrations in Project Viva children (sampled 2007-2010) were similar to concentrations among youth participants (aged 12-19 years) in the 2007-8 and 2009-10 National Health and Nutrition Examination Survey (NHANES); mean concentrations of most PFASs declined from 2007 to 2010 in Project Viva and NHANES...
April 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28314391/trace-determination-of-perfluorooctane-sulfonate-and-perfluorooctanoic-acid-in-environmental-samples-surface-water-wastewater-biota-sediments-and-sewage-sludge-using-liquid-chromatography-orbitrap-mass-spectrometry
#20
D Zacs, V Bartkevics
An analytical method was established and validated for the analysis of the most frequently monitored representatives among the group of perfluorinated compounds (PFAS), namely, perfluorooctanoic acid (PFOA) and prefluorooctane sulfonate (PFOS) in environmental samples (surface water, wastewater, sediments, sewage sludge, and biota). High performance liquid chromatography (HPLC) coupled to Orbitrap mass spectrometry (Orbitrap-MS) employing a heated electrospray ionization (HESI) interface operated in negative mode was used for the quantitative determination of these contaminants...
November 18, 2016: Journal of Chromatography. A
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