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Isabel Forner-Piquer, Constantinos C Mylonas, Josep Calduch-Giner, Francesca Maradonna, Giorgia Gioacchini, Marco Allarà, Fabiana Piscitelli, Vincenzo Di Marzo, Jaume Pérez-Sánchez, Oliana Carnevali
The increasing manufacture of plastics and their mismanagement has turned plastic into a ubiquitous waste in the marine environment. Among all the substances conforming the plastic items, the effects of a dietary Bisphenol A (BPA) and Di-isononyl phthalate (DiNP) have been evaluated in adult male gilthead sea bream, focusing on their effects in the modulation of the Endocannabinoid System (ECS). In zebrafish, the ECS has been recently chosen as a new target for the activity of some Endocrine Disrupting Chemicals (EDC), since it represents a complex lipid signaling network essential for the well-being of the organisms...
June 19, 2018: Environment International
Melanie K Stewart, Deidre M Mattiske, Andrew J Pask
Exposure to estrogenic endocrine disrupting chemicals (EDCs) during in utero development has been linked to the increasing incidence of disorders of sexual development (DSDs). Hypospadias, the ectopic placement of the urethra on the ventral aspect of the penis, is one of the most common DSDs affecting men, and can also affect women by resulting in the misplacement of the urethra. This study aimed to comprehensively assess the resulting hypospadias phenotypes in male and female mice exposed in utero from embryonic day 9...
June 21, 2018: Biology of Reproduction
Fekadu Yadetie, Xiaokang Zhang, Eileen Marie Hanna, Libe Aranguren-Abadía, Marta Eide, Nello Blaser, Morten Brun, Inge Jonassen, Anders Goksøyr, Odd André Karlsen
Polycyclic aromatic hydrocarbons such as benzo[a]pyrene (BaP) that activate the aryl hydrocarbon receptor (Ahr) pathway, and endocrine disruptors acting through the estrogen receptor pathway are among environmental pollutants of major concern. In this work, we exposed Atlantic cod (Gadus morhua) precision-cut liver slices (PCLS) to BaP (10 nM and 1000 nM), ethynylestradiol (EE2) (10 nM and 1000 nM), and equimolar mixtures of BaP and EE2 (10 nM and 1000 nM) for 48 h, and performed RNA-Seq based transcriptome mapping followed by systematic bioinformatics analyses...
June 7, 2018: Aquatic Toxicology
Jacob Steven Siracusa, Lei Yin, Emily Measel, Shenuxan Liang, Xiaozhong Yu
Known endocrine disruptor bisphenol A (BPA) has been shown to be a reproductive toxicant in animal models. Its structural analogs: bisphenol S (BPS), bisphenol F (BPF), bisphenol AF (BPAF), and tetrabromobisphenol A (TBBPA) are increasingly being used in consumer products. However, these analogs may exert similar adverse effects on the reproductive system, and their toxicological data are still limited. This mini-review examined studies on both BPA and BPA analog exposure and reproductive toxicity. It outlines the current state of knowledge on human exposure, toxicokinetics, endocrine activities, and reproductive toxicities of BPA and its analogs...
June 17, 2018: Reproductive Toxicology
Bhaskar Manna
Reduced graphene oxide has been rationally functionalized with histamine for the highly sensitive and selective electrochemical determination of bisphenol A (BPA). Histamine is covalently attached to graphene oxide by amide coupling and the oxygen functionalities of graphene oxide are partially reduced electrochemically. The facilitated electrochemical oxidation of BPA was achieved in neutral pH with functionalized reduced graphene oxide. The pH of the reaction controls the oxidation of BPA. Electrochemical oxidation is not favourable at pH less than the pKa of histamine due to the protonation of the imidazole nitrogen...
June 20, 2018: Analyst
Tae-Yong Jeong, Jana Asselman, Karel A C De Schamphelaere, Filip Van Nieuwerburgh, Dieter Deforce, Sang Don Kim
Propranolol (PRO), a human β-AR (β-adrenergic receptor) antagonist, is considered to result in specific effects in a non-target species, D. magna, based on our previous studies. The present study investigated the effects of β-AR agents, including an antagonist and agonist using pharmacologically relevant endpoints as well as a more holistic gene expression approach to reveal the impacts and potential mode of actions (MOAs) in the model non-target species. Results show that the responses in cardiac endpoints and gene expression in D...
June 12, 2018: Environmental Pollution
Raja Rezg, Anne Abot, Bessem Mornagui, Samir Aydi, Claude Knauf
Since 2010, Bisphenol A (BPA), an endocrine disruptor has been restricted and replaced by analogues like Bisphenol S (BPS). However, little is known about BPS effects and growing concern have suspected the "BPA-free" Label. Several recent studies suggest that BPS is associated with increased risk of diabetes and obesity. However, the underlying mechanisms remain unidentified. The current study investigates investigate BPS effects on hypothalamic neuropeptides regulating feeding behavior, either orexigenic or anorexigenic in Swiss Albino mice...
June 14, 2018: Ecotoxicology and Environmental Safety
Yu-Wen Huang, Hua Kwang Lee, Hou-Kuang Shih, Jen-Fon Jen
A dumbbell-shaped magnetic stir-bar with sublimate sorbent was prepared for the stir bar sorptive extraction (SBSE) of pesticides in an aqueous sample prior to gas chromatography-micro-electron capture detection (GC-μECD). Cyclododecane (CDD) was coated onto a magnetic stir-bar surface as a sublimate sorbent, and steel balls were placed on both ends to form a dumbbell-shaped magnetic stir-bar for SBSE. Four EDC pesticides including chlorpyrifos, ethion, bromopropylate, and λ-cyhalothrin in aqueous samples were selected as model species to examine the proposed SBSE and the following desorption...
June 6, 2018: Journal of Chromatography. A
Mart Bittremieux, Rita M La Rovere, Haidar Akl, Claudio Martines, Kirsten Welkenhuyzen, Kathia Dubron, Myriam Baes, Ann Janssens, Peter Vandenberghe, Luca Laurenti, Katja Rietdorf, Giampaolo Morciano, Paolo Pinton, Katsuhiko Mikoshiba, Martin D Bootman, Dimitar G Efremov, Humbert De Smedt, Jan B Parys, Geert Bultynck
Anti-apoptotic Bcl-2 proteins are upregulated in different cancers, including diffuse large B-cell lymphoma (DLBCL) and chronic lymphocytic leukemia (CLL), enabling survival by inhibiting pro-apoptotic Bcl-2-family members and inositol 1,4,5-trisphosphate (IP3 ) receptor (IP3 R)-mediated Ca2+ -signaling. A peptide tool (Bcl-2/IP3 R Disruptor-2; BIRD-2) was developed to abrogate the interaction of Bcl-2 with IP3 Rs by targeting Bcl-2's BH4 domain. BIRD-2 triggers cell death in primary CLL cells and in DLBCL cell lines...
June 13, 2018: Cell Death and Differentiation
Ali Asli, Isra Sadiya, Meirav Avital-Shacham, Mickey Kosloff
Understanding the molecular basis of interaction specificity between RGS (regulator of G protein signaling) proteins and heterotrimeric (αβγ) G proteins would enable the manipulation of RGS-G protein interactions, explore their functions, and effectively target them therapeutically. RGS proteins are classified into four subfamilies (R4, R7, RZ, and R12) and function as negative regulators of G protein signaling by inactivating Gα subunits. We found that the R12 subfamily members RGS10 and RGS14 had lower activity than most R4 subfamily members toward the Gi subfamily member Gαo Using structure-based energy calculations with multiple Gα-RGS complexes, we identified R12-specific residues in positions that are predicted to determine the divergent activity of this subfamily...
June 12, 2018: Science Signaling
G Manasa, Ronald J Mascarenhas, Ashis K Satpati, Basavanakote M Basavaraja, Sriram Kumar
Due to the enforcement of regulatory restrictions to prevent risk to human health from Bisphenol A (BPA), its structural analogue Bisphenol F (BPF) has been introduced into the market as an alternative. But however recent studies describe BPF as an effectual endocrine disruptor. Hence, there is an indispensible need for research concerning BPF human and environmental exposure level. In this work, we have elicited the development of an economical electrochemical sensor, to quantify and investigate in detail the electrochemical behavior of BPF using carbon paste electrode (CPE) modified with zinc oxide reduced graphene nanocomposite (ZnO/G) and cetyltrimethylammonium bromide (CTAB)...
June 4, 2018: Colloids and Surfaces. B, Biointerfaces
Jonathan J Sabbagh, Ricardo A Cordova, Dali Zheng, Marangelie Criado-Marrero, Andrea Lemus, Pengfei Li, Jeremy D Baker, Bryce A Nordhues, April L Darling, Carlos Martinez-Licha, Daniel A Rutz, Shreya Patel, Johannes Buchner, James W Leahy, John Koren, Chad A Dickey, Laura J Blair
Genetic and epigenetic alterations in FK506-binding protein 5 (FKBP5) have been associated with increased risk for psychiatric disorders, including post-traumatic stress disorder (PTSD). These variants can increase the expression of FKBP5, the gene that encodes FKBP51. Excess FKBP51 promotes hypothalamic-pituitary-adrenal (HPA) axis dysregulation through altered glucocorticoid receptor (GR) signaling. Thus, we hypothesized that GR activity could be restored by perturbing FKBP51. Here, we report that depletion of FKBP51 from the GR/90kDa heat shock protein (Hsp90) complex increased GR signaling in vivo...
June 12, 2018: ACS Chemical Biology
Ondřej Longin, Mohammed Hezwani, Helmus van de Langemheen, Rob M J Liskamp
Syntheses of novel semi-orthogonally protected CycloTriVeratrilene (CTV) analogues with enhanced water solubility, that is 3 and 4, derived from the previously described CTV scaffold derivative 2 are described here. These scaffolds 2-4 enabled a sequential introduction of three different complementarity determining region (CDR) mimics via Cu(i)-catalysed azide-alkyne cycloaddition towards medium-sized protein mimics denoted as "synthetic antibodies". The highly optimised sequential introduction enabled selective attachment of three different CDR mimics in a one-pot fashion...
June 12, 2018: Organic & Biomolecular Chemistry
Aleksandra Fucic, Karen S Galea, Radu Corneliu Duca, Mounia El Yamani, Nadine Frery, Lode Godderis, Thórhallur Ingi Halldorsson, Ivo Iavicoli, Sophie Ndaw, Edna Ribeiro, Susana Viegas, Hanns Moshammer
Endocrine disruptors (EDs) belong to large and diverse groups of agents that may cause multiple biological effects associated with, for example, hormone imbalance and infertility, chronic diseases such as diabetes, genome damage and cancer. The health risks related with the exposure to EDs are typically underestimated, less well characterized, and not regulated to the same extent as, for example, carcinogens. The increased production and utilization of identified or suspected EDs in many different technological processes raises new challenges with respect to occupational exposure settings and associated health risks...
June 11, 2018: International Journal of Environmental Research and Public Health
Linda Dunder, Margareta Halin Lejonklou, Lars Lind, Ulf Risérus, P Monica Lind
BACKGROUND: Bisphenol A (BPA) is an endocrine disruptor and also a suggested obesogen and metabolism-disrupting chemical. Accumulating data indicates that the fatty acid (FA) profile and their ratios in plasma and other metabolic tissues are associated with metabolic disorders. Stearoyl-CoA desaturase 1 (SCD-1) is a key regulator of lipid metabolism and its activity can be estimated by dividing the FA product by its precursor measured in blood or other tissues. OBJECTIVE: The primary aim of this study was to investigate the effect of low-dose developmental BPA exposure on tissue-specific FA composition including estimated SCD-1 activity, studied in 5- and 52-week (wk)-old Fischer 344 (F344) rat offspring...
June 6, 2018: Environmental Research
Jun Sub Park, Hyun Lee, Bo Woon Choi, Seonggu Ro, Doyoung Lee, Jeong Eun Na, Jeoung-Ho Hong, Jae-Seon Lee, Bong-Woo Kim, Young-Gyu Ko
Mitsugumin 53 (MG53) is an E3 ligase that induces insulin receptor substrate-1 (IRS-1) ubiquitination and degradation in skeletal muscle. We previously demonstrated that the pharmaceutical disruption of the MG53-IRS-1 interaction improves insulin sensitivity by abrogating IRS-1 ubiquitination and increasing IRS-1 levels in C2C12 myotubes. Here, we developed a novel MG53-IRS-1 interaction disruptor (MID-00935) that ameliorates insulin resistance in diet-induced obese (DIO) mice. MID-00935 disrupted the molecular interaction of MG53 and IRS-1, abrogated MG53-induced IRS-1 ubiquitination and degradation and improved insulin signaling in C2C12 myotubes...
June 6, 2018: Experimental & Molecular Medicine
Asma Siavashpour, Younes Ghasemi, Bahman Khalvati, Fereshteh Jeivad, Negar Azarpira, Hossein Niknahad
Organophosphate pesticides are considered as endocrine disruptors that interfere with reproductive functions. The corpus luteum (CL) is a transient endocrine gland that produces progesterone, a crucial hormone for a successful beginning and maintenance of pregnancy . Steroidogenic acute regulatory protein ( StAR ) facilitates the rate-limiting transfer of cholesterol from the outer mitochondrial membrane to the inner organelle membranes. We investigated the effect of Diazinon (DZN), an organophosphate, on StAR mRNA expression by Sybergreen Real Time-PCR in a time-dependent manner in luteal phase...
2018: Iranian Journal of Pharmaceutical Research: IJPR
Danilo Basili, Ji-Liang Zhang, John Herbert, Kevin J Kroll, Nancy D Denslow, Christopher J Martyniuk, Francesco Falciani, Philipp Antczak
In recent years, decreases in fish populations have been attributed, in part, to the effect of environmental chemicals on ovarian development. Determining the molecular events underlying ovarian development is expected to contribute to the prevention of population decline in fish species by identifying the critical windows by which chemicals exert their effects on this process. Using computational modelling, we developed a dynamic model of ovary development linking gene transcription to key physiological endpoints, such as gonadosomatic index (GSI), plasma levels of estradiol (E2) and vitellogenin (VTG), in largemouth bass ( Micropterus salmoides)...
June 7, 2018: Environmental Science & Technology
Bodhisattwa Mondal, Hongxia Chen, Weihua Wen, Ercole L Cavalieri, Eleanor G Rogan, Muhammad Zahid
Arsenic trioxide (As2 O3 ) is an environmental carcinogen and a putative endocrine disruptor. Resveratrol has been shown to reverse As2 O3 -induced oxidative damage. In immortalized but nontransformed estrogen receptor α-negative human breast cells (MCF10A), we observed that 25 μM resveratrol ameliorated As2 O3 -induced cytotoxicity. As2 O3 , in the presence or absence of 25 μM resveratrol, induced quinone reductase (NAD(P)H quinone dehydrogenase 1), via the induction of NFE2-related factor 2. As2 O3 caused a repression of cytochrome P450 (CYP)1B1, but the addition of 25 μM resveratrol rescued the expression of cytochrome P450 1B1 and kept it at a constant level...
May 31, 2018: ACS Omega
Elisângela Martins-Santos, Cristiano Guimarães Pimenta, Pollyana Rabelo Nunes Campos, André Gustavo Oliveira, Germán Arturo Bohórquez Mahecha, Cleida Aparecida Oliveira
The widely used herbicide atrazine is a potent endocrine disruptor known to cause increased aromatase expression and transient increase in testicular weight followed by remarkable testis atrophy. However, whether the effects of atrazine on the testes are primary or secondary to dysfunctions in other components of male reproductive tract remains unknown. Given the high sensitivity of the efferent ductules to estrogen imbalance and the similarity to alterations previously described for other disruptors of these ductules function, and the testicular alterations observed after atrazine exposure, we hypothesized that the efferent ductules could be a target for atrazine...
February 2018: Chemosphere
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