keyword
MENU ▼
Read by QxMD icon Read
search

Bpa

keyword
https://www.readbyqxmd.com/read/29137705/novel-approach-to-high-throughput-determination-of-endocrine-disruptors-using-recycled-diatomaceous-earth-as-a-green-sorbent-phase-for-thin-film-solid-phase-microextraction-combined-with-96-well-plate-system
#1
Nicolas Kirschner, Adriana Neves Dias, Dilma Budziak, Cristian Berto da Silveira, Josias Merib, Eduardo Carasek
A sustainable approach to TF-SPME is presented using recycled diatomaceous earth, obtained from a beer purification process, as a green sorbent phase for the determination of bisphenol A (BPA), benzophenone (BzP), triclocarban (TCC), 4-methylbenzylidene camphor (4-MBC) and 2-ethylhexyl-p-methoxycinnamate (EHMC) in environmental water samples. TF-SPME was combined with a 96-well plate system allowing for high-throughput analysis due to the simultaneous extraction/desorption up to 96 samples. The proposed sorbent phase exhibited good stability in organic solvents, as well as satisfactory analytical performance...
December 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29137304/monocarboxylate-transporter-1-mct1-a-tool-to-stratify-acute-myeloid-leukemia-aml-patients-and-a-vehicle-to-kill-cancer-cells
#2
Filipa Lopes-Coelho, Carolina Nunes, Sofia Gouveia-Fernandes, Rita Rosas, Fernanda Silva, Paula Gameiro, Tânia Carvalho, Maria Gomes da Silva, José Cabeçadas, Sérgio Dias, Luís G Gonçalves, Jacinta Serpa
Dysregulation of glucose/lactate dynamics plays a role in cancer progression, and MCTs are key elements in metabolic remodeling. VEGF is a relevant growth factor in the maintenance of bone marrow microenvironment and it is also important in hematological diseases. Our aim was to investigate the role of VEGF in the metabolic adaptation of Acute myeloid leukemia (AML) cells by evaluating the metabolic profiles and cell features according to the AML lineage and testing lactate as a metabolic coin. Our in vitro results showed that AML promyelocytic (HL60) and monocytic (THP1) (but not erythroid- HEL) lineages are well adapted to VEGF and lactate rich environment...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29136846/determination-of-bisphenols-with-estrogenic-activity-in-plastic-packaged-baby-food-samples-using-solid-liquid-extraction-and-clean-up-with-dispersive-sorbents-followed-by-gas-chromatography-tandem-mass-spectrometry-analysis
#3
M T García-Córcoles, M Cipa, R Rodríguez-Gómez, A Rivas, F Olea-Serrano, J L Vílchez, A Zafra-Gómez
Bisphenols (BPs) are a family of chemicals with known endocrine disrupting activity. Bisphenol A (BPA) is the most representative prototype of this group of chemicals. Recently, the use of BPA, a prototype of endocrine disruptors, has been reduced and replaced with structural analogs due to its negative effects on both the environment and consumers. In this work, a new method is presented for the determination of seven BPs, with estrogenic activity in ready-to-eat plastic packaged baby foods. The procedure involves the isolation of the analytes using solid-liquid phase extraction with acetonitrile followed by a clean-up step with a mixture of dispersive-SPE sorbents (C18 and PSA) and magnesium sulphate, to reduce matrix effect from proteins, sugars and lipids...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29132025/micro-quechers-extraction-coupled-to-gc-ms-for-a-fast-determination-of-bisphenol-a-in-human-urine
#4
Luísa Correia-Sá, Sónia Norberto, Cristina Delerue-Matos, Conceição Calhau, Valentina F Domingues
Bisphenol A (BPA) is considered an endocrine disruptor and public concern over BPA exposure has been raised. Several studies have assessed human exposure to this plasticizer, confirming its ubiquitous presence and highlighting children as a public of special concern. A simple, efficient, cheap and green analytical procedure is reported within this paper. This paper reports, for the first time, the development of a modified Micro-QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method coupled to gas chromatography-mass spectrometry (GC-MS) as a new strategy for the efficient extraction and determination of Bisphenol A in human urine samples...
November 8, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29129240/maternal-methyl-donor-supplementation-during-gestation-counteracts-bisphenol-a-induced-oxidative-stress-in-sows-and-offspring
#5
Daolin Mou, Jun Wang, Hong Liu, Yuling Chen, Lianqiang Che, Zhengfeng Fang, Shengyu Xu, Yan Lin, Bin Feng, Jian Li, De Wu
OBJECTIVE: Maternal oxidative stress is harmful for embryonic, fetal, and placental development. The aim of this study was to investigate whether methyl donor supplementation during gestation effectively ameliorates maternal and placenta oxidative stress up to offspring. METHODS: Fifty-six Landrace × Yorkshire sows were randomly allocated to receive one of the following four diets during gestation: control diet (CON); control diet supplemented with methyl donor (MET); control diet supplemented with bisphenol A (BPA); and control diet supplemented with BPA and MET (BPA + MET)...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29129061/a-highly-sensitive-and-high-throughput-method-for-the-analysis-of-bisphenol-analogues-and-their-halogenated-derivatives-in-breast-milk
#6
Yumin Niu, Bin Wang, Yunfeng Zhao, Jing Zhang, Bing Shao
The structural analogs of bisphenol A (BPA) and their halogenated derivatives (together referred as BPs) have been found in environment, food and even human. Limited research showed that some of them exhibited similar to or even greater toxicities than BPA. Therefore, adverse effects on humans with low-dose in early life exposure were expected for BPs. Breast milk is an excellent matrix could reflect fetus and babies exposure to contaminants. Some of the emerging BPs may present with trace or ultra-trace levels in human...
November 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29128640/binding-interactions-of-halogenated-bisphenol-a-with-mouse-ppar%C3%AE-in-vitro-investigation-and-molecular-dynamics-simulation
#7
Jie Zhang, Tiezhu Li, Tuoyi Wang, Tianzhu Guan, Hansong Yu, Zhuolin Li, Yongzhi Wang, Yongjun Wang, Tiehua Zhang
The binding of bisphenol A (BPA) and its halogenated derivatives (halogenated BPAs) to mouse peroxisome proliferator-activated receptor α ligand binding domain (mPPARα-LBD) was examined by a combination of in vitro investigation and in silico simulation. Fluorescence polarization (FP) assay showed that halogenated BPAs could bind to mPPARα-LBD* as the affinity ligands. The calculated electrostatic potential (ESP) illustrated the different charge distributions of halogenated BPAs with altered halogenation patterns...
November 8, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29128613/submicromolar-bisphenol-a-induces-proliferation-and-dna-damage-in-human-hepatocyte-cell-lines-in-vitro-and-in-juvenile-rats-in-vivo
#8
Seoyoung Kim, Gilim Mun, Eun Choi, Minjeong Kim, Ji Seong Jeong, Keon Wook Kang, Sunha Jee, Kyung-Min Lim, Yun-Sil Lee
An association between bisphenol A (BPA) exposure and hepatic tumors was suggested, but the employment of high-dose levels raises questions about its relevance to human health. Here, we demonstrate that submicromolar concentrations of BPA induce the proliferation and DNA damage in human hepatocyte cell lines. In HepG2 and NKNT-3, undifferentiated and differentiated hepatocyte cell lines, respectively, submicromolar BPA concentrations promoted the cell proliferation, as indicated by enhanced DNA synthesis and elevated expression of cell-cycle proteins...
November 8, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29127374/prediction-of-human-prenatal-exposure-to-bisphenol-a-and-bisphenol-a-glucuronide-from-an-ovine-semi-physiological-toxicokinetic-model
#9
Glenn Gauderat, Nicole Picard-Hagen, Pierre-Louis Toutain, Rémi Servien, Catherine Viguié, Sylvie Puel, Marlène Z Lacroix, Tanguy Corbel, Alain Bousquet-Melou, Véronique Gayrard
Bisphenol A (BPA) risk assessment is hampered by the difficulty of determining the extent of internal exposure in the human fetus and uncertainties regarding BPA toxicokinetics (TK) in the maternal-fetal unit. A feto-maternal TK model describing BPA and BPA glucuronide (BPAG) disposition in sheep was humanized, using human TK data obtained after d6-BPA administration on a cookie, to predict BPA and BPAG kinetics in the human mother-fetus unit. Validation of the model predictions included the assessed dose proportionality of BPA and BPAG disposition and the similarity between the simulated and measured time courses of BPA and BPAG in fetal rhesus monkeys after BPA maternal dosing...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29126515/endocrine-disruptors-eds-and-hormone-dependent-cancers-correlation-or-causal-relationship
#10
Henri Rochefort
The selective increase in the incidence of hormone-dependent cancers (breast, prostate, testicular) in industrialized countries is associated with the increasing number of endocrine disruptors (EDs) in the environment and raises questions about the role of EDs in mammary carcinogenesis. Answering these questions is difficult because the number of EDs is large and varies with time. Moreover hormonal carcinogenesis is multifactorial and progresses slowly and in stages. This discussion will be limited to breast cancer and three EDs: distilbene, bisphenol A (BPA), and dichlorodiphenyltrichloroethane (DDT)...
September 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/29126512/what-is-an-endocrine-disruptor
#11
Claude Monneret
Endocrine disrupting chemicals (EDCs) and potential EDCs are mostly man-made found in various materials. By interfering with the body's endocrine system, endocrine disruptors produce adverse developmental, reproductive, neurological, and immune effects in humans, abnormal growth patterns and neurodevelopmental delays in children. Thus, diethylstilbestrol (DES) a non-steroidal estrogen, which is regarded as a proof of concept, induces clear cell carcinoma among young women. EDCS may be found in plastic bottles and metal food cans (BPA), medical devices (phthalates), detergents, flame retardants (polybrominated diphenyl ethers), food (BPA), toys (phthalates), cosmetics and drugs (parabens), and pesticides (alkyl phenols such as nonylphenol)...
September 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/29121558/high-performance-and-versatile-electrochemical-aptasensor-based-on-self-supported-nanoporous-gold-microelectrode-and-enzyme-induced-signal-amplification
#12
Lei Shi, Xiaojiao Rong, Yan Wang, Shiming Ding, Wanying Tang
Herein, novel and versatile electrochemical aptasensors were constructed on a self-supported nanoporous gold (np-Au) microelectrode, integrating with an exonuclease III (Exo III) induced signal amplification strategy. Self-supported np-Au microelectrode with 3D bicontinuous nanoporous structures possesses tremendously large specific area, clean surface, high stability and biocompatibility, bringing about significant advantages in both molecular recognition and signal response. As paradigms, two analytes of bisphenol A (BPA) and ochratoxin A (OTA) were selected to demonstrate the superiority and versatility of designed aptasensors...
November 6, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29115172/ecotoxicological-effects-of-bisphenol-a-and-nonylphenol-on-the-freshwater-cladocerans-ceriodaphnia-silvestrii-and-daphnia-similis
#13
Mariângela Spadoto, Ana Paula Erbetta Sueitt, Carlos Alexandre Galinaro, Tiago da Silva Pinto, Caroline Moço Erba Pompei, Clarice Maria Rispoli Botta, Eny Maria Vieira
Toxicities of bisphenol A (BPA) and nonylphenol (NP) to the neotropical freshwater cladocerans Ceriodaphnia silvestrii and Daphnia similis were studied under laboratory conditions. Acute exposures to BPA generated mean 48-h EC50 values of 14.44 (6.02-22.85) mg L(-1) for C. silvestrii and 12.05 (1.73-22.37) mg L(-1) for D. similis. When the organisms were exposed to acute doses of NP, mean 48-h EC50 values were 0.055 (0.047-0.064) mg L(-1) (C. silvestrii) and 0.133 (0.067-0.200) mg L(-1) (D. similis). Ceriodaphnia silvestrii was also tested in chronic bioassays, which resulted in mean 8-d IC25 values of 2...
November 8, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29113915/bisphenol-a-accelerates-meiotic-progression-in-embryonic-chickens-via-the-estrogen-receptor-%C3%AE-signaling-pathway
#14
Minli Yu, Yali Xu, Ming Li, Dongfeng Li, Yinglin Lu, Debing Yu, Wenxing Du
Bisphenol A (BPA) as an endocrine-disrupting chemical with weak estrogenic activity affects formation of primordial follicles. This study aimed to identify the potential effects and molecular mechanisms of BPA on meiosis and primordial follicle formation in chickens. The results suggest that the cortical layer was thickened and the number of germ cells that entered into meiosis was increased in BPA-treated ovaries. The percentage of γH2AX-positive cells increased significantly. In addition, up-regulated mRNA expression of meiotic genes, including stimulated by retinoic acid gene 8 (Stra8), disrupted meiotic cDNA 1 homologue (Dmc1) and synaptonemal complex protein 3 (Scp3) were observed in BPA-treated ovaries...
November 4, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29111387/hyperlipidemia-induced-hepassocin-in-the-liver-contributes-to-insulin-resistance-in-skeletal-muscle
#15
Tae Woo Jung, Yoon Hee Chung, Hyoung-Chun Kim, A M Abd El-Aty, Ji Hoon Jeong
Hepassocin (HPS) has recently been identified as a novel hepatokine that causes hepatic steatosis. However, the role of HPS in the development of insulin resistance in skeletal muscle under obesity remains unclear. The effect of hyperlipidemia on hepatic HPS expression was evaluated in primary hepatocytes and liver of mice. HPS-mediated signal pathways were explored using small interfering (si) RNAs of specific genes or inhibitors. We found that treatment of primary hepatocytes with palmitate could induce HPS expression through C/EBPβ-mediated transcriptional activation...
October 27, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29110462/aerobic-soil-biodegradation-of-bisphenol-bpa-alternatives-bisphenol-s-and-bisphenol-bpaf-compared-to-bpa
#16
Youn Jeong Choi, Linda S Lee
Pressures to ban bisphenol A (BPA) has led to the use of alternate chemicals such as BPA analogues bisphenol S and bisphenol AF in production of consumer products; however, information on their environmental fate is scarce. In this study, aerobic degradation of BPA, BPAF and BPS at 100 μg/kg soil and 22  2 ℃ was monitored for up to 180 d in a forest soil and an organic farm soil. At each sampling point, soils were extracted three times and analyzed by liquid chromatography high resolution mass or time of flight mass spectrometry...
November 7, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29107605/human-health-risks-related-to-the-consumption-of-foodstuffs-of-animal-origin-contaminated-by-bisphenol-a
#17
Sébastien Gorecki, Nawel Bemrah, Alain-Claude Roudot, Eric Marchioni, Bruno Le Bizec, Franck Faivre, Manik Kadawathagedara, Jérémie Botton, Gilles Rivière
Bisphenol A (BPA) is used in a wide variety of products and objects for consumers use (digital media such as CD's and DVD's, sport equipment, food and beverage containers, medical equipment). For humans, the main route of exposure to BPA is food. Based on previous estimates, almost 20% of the dietary exposure to BPA in the French population would be from food of animal origin. However, due to the use of composite samples, the source of the contamination had not been identified. Therefore, 322 individual samples of non-canned foods of animal origin were collected with the objectives of first updating the estimation of the exposure of the French population and second identifying the source of contamination of these foodstuffs using a specific analytical method...
October 28, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29104009/a-plurality-of-molecular-targets-the-receptor-ecosystem-for-bisphenol-a-bpa
#18
REVIEW
Harry MacKay, Alfonso Abizaid
Bisphenol-A (BPA) is a well-known endocrine disrupting compound (EDC), capable of affecting the normal function and development of the reproductive system, brain, adipose tissue, and more. In spite of these diverse and well characterized effects, there is often comparatively little known about the molecular mechanisms which bring them about. BPA has traditionally been regarded as a primarily estrogenic EDC, and this perspective is often what guides research into the effects of BPA. However, emerging data from in-vitro and in-silico models show that BPA binds with a significant number of hormone receptors, including a number of nuclear and membrane-bound estrogen receptors, androgen receptors, as well as the thyroid hormone receptor, glucocorticoid receptor, and PPARγ...
November 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/29103408/effects-of-bisphenol-a-treatment-during-pregnancy-on-kidney-development-in-mice-a-stereological-and-histopathological-study
#19
P Nuñez, T Fernandez, M García-Arévalo, P Alonso-Magdalena, A Nadal, C Perillan, J Arguelles
Bisphenol A (BPA) is a chemical found in plastics that resembles oestrogen in organisms. Developmental exposure to endocrine-disrupting chemicals, such as BPA, increases the susceptibility to type 2 diabetes (T2DM) and cardiovascular diseases. Animal studies have reported a nephron deficit in offspring exposed to maternal diabetes. The aim of this study was to investigate the prenatal BPA exposure effects on nephrogenesis in a mouse model that was predisposed to T2DM. This study quantitatively evaluated the renal structural changes using stereology and histomorphometry methods...
November 6, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/29103116/toward-new-benchmark-adsorbents-preparation-and-characterization-of-activated-carbon-from-argan-nut-shell-for-bisphenol-a-removal
#20
Mohamed Zbair, Kaisu Ainassaari, Asmaa Drif, Satu Ojala, Michael Bottlinger, Minna Pirilä, Riitta L Keiski, Mohammed Bensitel, Rachid Brahmi
The use of argan nut shell as a precursor for producing activated carbon was investigated in this work. Two activated carbons AC-HP and AC-Na were prepared from argan nut shell by chemical activation method using phosphoric acid (H3PO4) and sodium hydroxide (NaOH), respectively. Textural, morphological, and surface chemistry characteristics were studied by nitrogen physisorption, TGA, SEM, TXRF, FTIR, XRD, and by determining the pHPZC of the AC-HP. The adsorption experiments revealed that AC-HP was more efficient in adsorption of BPA due to high specific surface area (1372 m(2)/g) compared to AC-Na (798 m(2)/g)...
November 4, 2017: Environmental Science and Pollution Research International
keyword
keyword
20764
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"