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https://www.readbyqxmd.com/read/28193775/targeting-the-eed-h3k27me3-interaction-allosterically-inhibits-prc2
#1
(no author information available yet)
EED226 and A-395 bind to the H3K27me3 binding pocket of EED to allosterically inhibit PRC2.
February 13, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28192098/anti-leukemic-effects-of-hdaci-belinostat-and-hmti-3-deazaneplanocin-a-on-human-acute-promyelocytic-leukemia-cells
#2
Giedrė Valiulienė, Ieva Stirblytė, Monika Jasnauskaitė, Veronika Borutinskaitė, Rūta Navakauskienė
Development of acute myeloid leukemia is usually sustained by deregulated epigenome. Alterations in DNA methylation and histone modifications are common manifestations of the disease. Acute promyelocytic leukemia (APL) is not an exception. Therefore, drugs that target epigenetic processes suggest an appealing strategy for APL treatment. In this study we tested the anti-leukemic activity of histone deacetylase inhibitor (HDACi) Belinostat (PXD101, (2E)-N-Hydroxy-3-[3-(phenylsulfamoyl)phenyl]prop-2-enamide), and histone methyltransferase inhibitor (HMTi) 3-Deazaneplanocin A (DZNep, 5R-(4-amino-1H-imidazo[4,5-c]pyridin-1-yl)-3-(hydroxymethyl)-3-cyclopentene-1S,2R-diol) combined with retinoic acid (RA) in APL cells NB4 and HL-60...
February 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28174222/systematic-review-of-pathways-for-the-delivery-of-allergy-services
#3
Lavanya Diwakar, Carole Cummins, Richard Lilford, Tracy Roberts
OBJECTIVES: The incidence and prevalence of allergies worldwide has been increasing and allergy services globally are unable to keep up with this increase in demand. This systematic review aims to understand the delivery of allergy services worldwide, challenges faced and future directions for service delivery. METHODS: A systematic scoping review of Ovid, EMBASE, HMIC, CINAHL, Cochrane, DARE, NHS EED and INAHTA databases was carried out using predefined inclusion and exclusion criteria...
February 7, 2017: BMJ Open
https://www.readbyqxmd.com/read/28165227/discovery-of-peptidomimetic-ligands-of-eed-as-allosteric-inhibitors-of-prc2
#4
Kimberly Diane Barnash, Juliana The, Jacqueline L Norris-Drouin, Stephanie H Cholensky, Beau M Worley, Fengling Li, Jacob I Stuckey, Peter J Brown, Masoud Vedadi, Cheryl H Arrowsmith, Stephen V Frye, Lindsey I James
The function of EED within Polycomb repressive complex 2 (PRC2) is mediated by a complex network of protein-protein interactions. Allosteric activation of PRC2 by binding of methylated proteins to EED's aromatic cage is essential for full catalytic activity, but details of this regulation are not fully understood. EED's recognition of the product of PRC2 activity, histone H3 lysine 27 trimethylation (H3K27me3), stimulates PRC2 methyltransferase activity at adjacent nucleosomes leading to H3K27me3 propagation and, ultimately, gene repression...
February 6, 2017: ACS Combinatorial Science
https://www.readbyqxmd.com/read/28153450/tailored-liquid-chromatography-mass-spectrometry-analysis-improves-the-coverage-of-the-intracellular-metabolome-of-heparg-cells
#5
Matthias Cuykx, Noelia Negreira, Charlie Beirnaert, Nele Van den Eede, Robim Rodrigues, Tamara Vanhaecke, Kris Laukens, Adrian Covaci
Metabolomics protocols are often combined with Liquid Chromatography-Mass Spectrometry (LC-MS) using mostly reversed phase chromatography coupled to accurate mass spectrometry, e.g. quadrupole time-of-flight (QTOF) mass spectrometers to measure as many metabolites as possible. In this study, we optimised the LC-MS separation of cell extracts after fractionation in polar and non-polar fractions. Both phases were analysed separately in a tailored approach in four different runs (two for the non-polar and two for the polar-fraction), each of them specifically adapted to improve the separation of the metabolites present in the extract...
March 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28135237/the-eed-protein-protein-interaction-inhibitor-a-395-inactivates-the-prc2-complex
#6
Yupeng He, Sujatha Selvaraju, Michael L Curtin, Clarissa G Jakob, Haizhong Zhu, Kenneth M Comess, Bailin Shaw, Juliana The, Evelyne Lima-Fernandes, Magdalena M Szewczyk, Dong Cheng, Kelly L Klinge, Huan-Qiu Li, Marina Pliushchev, Mikkel A Algire, David Maag, Jun Guo, Justin Dietrich, Sanjay C Panchal, Andrew M Petros, Ramzi F Sweis, Maricel Torrent, Lance J Bigelow, Guillermo Senisterra, Fengling Li, Steven Kennedy, Qin Wu, Donald J Osterling, David J Lindley, Wenqing Gao, Scott Galasinski, Dalia Barsyte-Lovejoy, Masoud Vedadi, Fritz G Buchanan, Cheryl H Arrowsmith, Gary G Chiang, Chaohong Sun, William N Pappano
Polycomb repressive complex 2 (PRC2) is a regulator of epigenetic states required for development and homeostasis. PRC2 trimethylates histone H3 at lysine 27 (H3K27me3), which leads to gene silencing, and is dysregulated in many cancers. The embryonic ectoderm development (EED) protein is an essential subunit of PRC2 that has both a scaffolding function and an H3K27me3-binding function. Here we report the identification of A-395, a potent antagonist of the H3K27me3 binding functions of EED. Structural studies demonstrate that A-395 binds to EED in the H3K27me3-binding pocket, thereby preventing allosteric activation of the catalytic activity of PRC2...
January 30, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28135235/an-allosteric-prc2-inhibitor-targeting-the-h3k27me3-binding-pocket-of-eed
#7
Wei Qi, Kehao Zhao, Justin Gu, Ying Huang, Youzhen Wang, Hailong Zhang, Man Zhang, Jeff Zhang, Zhengtian Yu, Ling Li, Lin Teng, Shannon Chuai, Chao Zhang, Mengxi Zhao, HoMan Chan, Zijun Chen, Douglas Fang, Qi Fei, Leying Feng, Lijian Feng, Yuan Gao, Hui Ge, Xinjian Ge, Guobin Li, Andreas Lingel, Ying Lin, Yueqin Liu, Fangjun Luo, Minlong Shi, Long Wang, Zhaofu Wang, Yanyan Yu, Jue Zeng, Chenhui Zeng, Lijun Zhang, Qiong Zhang, Shaolian Zhou, Counde Oyang, Peter Atadja, En Li
Polycomb repressive complex 2 (PRC2) consists of three core subunits, EZH2, EED and SUZ12, and plays pivotal roles in transcriptional regulation. The catalytic subunit EZH2 methylates histone H3 lysine 27 (H3K27), and its activity is further enhanced by the binding of EED to trimethylated H3K27 (H3K27me3). Small-molecule inhibitors that compete with the cofactor S-adenosylmethionine (SAM) have been reported. Here we report the discovery of EED226, a potent and selective PRC2 inhibitor that directly binds to the H3K27me3 binding pocket of EED...
January 30, 2017: Nature Chemical Biology
https://www.readbyqxmd.com/read/28124441/confirmation-of-mutation-landscape-of-nf1-associated-malignant-peripheral-nerve-sheath-tumors
#8
Pierre Sohier, Armelle Luscan, Angharad Lloyd, Kevin Ashelford, Ingrid Laurendeau, Audrey Briand-Suleau, Dominique Vidaud, Nicolas Ortonne, Eric Pasmant, Meena Upadhyaya
The commonest tumors associated with neurofibromatosis type 1 (NF1) are benign peripheral nerve sheath tumors, called neurofibromas. Malignant transformation of neurofibromas into aggressive MPNSTs may occur with a poor patient prognosis. A co-operative role of SUZ12 or EED inactivation, along with NF1, TP53, and CDKN2A loss-of-function, has been proposed to drive progression to MPNSTs. An exome sequencing analysis of eight MPNSTs, one plexiform neurofibroma, and seven cutaneous neurofibromas was undertaken...
January 25, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28122695/environmental-enteric-dysfunction-is-associated-with-carnitine-deficiency-and-altered-fatty-acid-oxidation
#9
Richard D Semba, Indi Trehan, Ximin Li, Ruin Moaddel, M Isabel Ordiz, Kenneth M Maleta, Klaus Kraemer, Michelle Shardell, Luigi Ferrucci, Mark Manary
BACKGROUND: Environmental enteric dysfunction (EED), a condition characterized by small intestine inflammation and abnormal gut permeability, is widespread in children in developing countries and a major cause of growth failure. The pathophysiology of EED remains poorly understood. METHODS: We measured serum metabolites using liquid chromatography-tandem mass spectrometry in 400 children, aged 12-59months, from rural Malawi. Gut permeability was assessed by the dual-sugar absorption test...
January 18, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28119537/corrigendum-a-novel-mutation-in-eed-associated-with-overgrowth
#10
Ana S A Cohen, Beyhan Tuysuz, Yaoqing Shen, Sanjiv K Bhalla, Steven J M Jones, William T Gibson
No abstract text is available yet for this article.
February 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28118846/ecological-validity-of-cost-effectiveness-models-of-universal-hpv-vaccination-a-protocol-for-a-systematic-review
#11
Giampiero Favato, Emmanouil Noikokyris, Riccardo Vecchiato
BACKGROUND: Sexually transmitted infection with high-risk, oncogenic strains of human papillomavirus (HPV) still induces a relevant burden of diseases on both men and women. Although vaccines appear to be highly efficacious in preventing the infection of the most common high-risk strains (HPV 6, 11, 16, 18), important questions regarding the appropriate target population for prophylactic vaccination are still debated. Models in the extant literature seem to converge on the cost-effectiveness of high coverage (>80%) of a single cohort of 12-year-old girls...
January 25, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28111304/split-luciferase-based-biosensors-for-characterizing-eed-binders
#12
Ling Li, Lijian Feng, Minlong Shi, Jue Zeng, Zijun Chen, Li Zhong, Li Huang, Weihui Guo, Ying Huang, Wei Qi, Chris Lu, En Li, Kehao Zhao, Justin Gu
The EED (embryonic ectoderm development) subunit of the Polycomb repressive complex 2 (PRC2) plays an important role in the feed forward regulation of the PRC2 enzymatic activity. We recently identified a new class of allosteric PRC2 inhibitors that bind to the H3K27me3 pocket of EED. Multiple assays were developed and used to identify and characterize this type of PRC2 inhibitors. One of them is a genetically encoded EED biosensor based on the EED[G255D] mutant and the split firefly luciferase. This EED biosensor can detect the compound binding in the transfected cells and in the in vitro biochemical assays...
January 19, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28099588/dobutamine-stress-echocardiography-safety-in-chagas-disease-patients
#13
Daniela do Carmo Rassi, Marcelo Luiz Campos Vieira, Rogerio Gomes Furtado, Fabio de Paula Turco, Luciano Henrique Melato, Viviane Tiemi Hotta, Colandy Godoy de Oliveira Nunes, Luiz Rassi, Salvador Rassi
Background: A few decades ago, patients with Chagas disease were predominantly rural workers, with a low risk profile for obstructive coronary artery disease (CAD). As urbanization has increased, they became exposed to the same risk factors for CAD of uninfected individuals. Dobutamine stress echocardiography (DSE) has proven to be an important tool in CAD diagnosis. Despite being a potentially arrhythmogenic method, it is safe for coronary patients without Chagas disease. For Chagas disease patients, however, the indication of DSE in clinical practice is uncertain, because of the arrhythmogenic potential of that heart disease...
January 16, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28098939/a-systematic-review-of-economic-evaluations-of-treatments-for-patients-with-epilepsy
#14
REVIEW
Ben F M Wijnen, Ghislaine A P G van Mastrigt, Silvia M A A Evers, Olga Gershuni, Danielle A J E Lambrechts, Marian H J M Majoie, Debby Postulart, Bert A P Aldenkamp, Reina J A de Kinderen
The increasing number of treatment options and the high costs associated with epilepsy have fostered the development of economic evaluations in epilepsy. It is important to examine the availability and quality of these economic evaluations and to identify potential research gaps. As well as looking at both pharmacologic (antiepileptic drugs [AEDs]) and nonpharmacologic (e.g., epilepsy surgery, ketogenic diet, vagus nerve stimulation) therapies, this review examines the methodologic quality of the full economic evaluations included...
January 18, 2017: Epilepsia
https://www.readbyqxmd.com/read/28094489/the-sex-specific-internal-and-external-demands-imposed-on-players-during-ultimate-frisbee-game-play
#15
Maria C Madueno, Crystal O Kean, Aaron T Scanlan
BACKGROUND: Despite the growing popularity of Ultimate Frisbee (UF) across sexes, the game demands imposed on players have been predominately examined in males. This study aimed to compare the internal and external demands of UF game-play in males and females. METHODS: Male (N = 10) and female (N = 10) recreational UF players competed in separate sex-specific, indoor UF games. Internal responses (blood lactate concentration ([BLa-]), rating of perceived exertion (RPE), and heart rate (HR)) and external responses (direction-specific and total relative (·min-1) PlayerLoadTM (PL), and Estimated Equivalent Distance (EED)) were measured...
January 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28092155/discovery-of-first-in-class-potent-and-orally-bioavailable-eed-inhibitor-with-robust-anti-cancer-efficacy
#16
Ying Huang, Jeff Zhang, Zhengtian Yu, Hailong Zhang, Youzhen Wang, Andreas Lingel, Wei Qi, X Justin Gu, Kehao Zhao, Michael David Shultz, Long Wang, Xingnian Fu, Yongfeng Sun, Qiong Zhang, Xiangqing Jiang, Jiang-Wei Zhang, Chunye Zhang, Ling Li, Jue Zeng, Lijian Feng, Chao Zhang, Yueqin Liu, Man Zhang, Lijun Zhang, Mengxi Zhao, Zhenting Gao, Xianghui Liu, Douglas Fang, Haibing Guo, Yuan Mi, Tobias Gabriel, Michael P Dillon, Peter Atadja, Counde Oyang
Overexpression and somatic heterozygous mutations of EZH2, the catalytic subunit Polycomb repressive complex 2 (PRC2), are associated with several tumor types. EZH2 inhibitor, EPZ-6438 (Tazemetostat), demonstrated clinical efficacy in patients with acceptable safety profile as monotherapy. EED, another subunit of PRC2 complex, is essential for its histone methyltransferase activity through direct binding to trimethylated lysine 27 on histone 3 (H3K27Me3). Herein we disclose the discovery of a first-in-class potent, selective and orally bioavailable EED inhibitor EED226 (compound 43)...
January 16, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28072869/discovery-and-molecular-basis-of-a-diverse-set-of-polycomb-repressive-complex-2-inhibitors-recognition-by-eed
#17
Ling Li, Hailong Zhang, Man Zhang, Mengxi Zhao, Lijian Feng, Xiao Luo, Zhenting Gao, Ying Huang, Ophelia Ardayfio, Ji-Hu Zhang, Ying Lin, Hong Fan, Yuan Mi, Guobin Li, Lei Liu, Leying Feng, Fangjun Luo, Lin Teng, Wei Qi, Johannes Ottl, Andreas Lingel, Dirksen E Bussiere, Zhengtian Yu, Peter Atadja, Chris Lu, En Li, Justin Gu, Kehao Zhao
Polycomb repressive complex 2 (PRC2), a histone H3 lysine 27 methyltransferase, plays a key role in gene regulation and is a known epigenetics drug target for cancer therapy. The WD40 domain-containing protein EED is the regulatory subunit of PRC2. It binds to the tri-methylated lysine 27 of the histone H3 (H3K27me3), and through which stimulates the activity of PRC2 allosterically. Recently, we disclosed a novel PRC2 inhibitor EED226 which binds to the K27me3-pocket on EED and showed strong antitumor activity in xenograft mice model...
2017: PloS One
https://www.readbyqxmd.com/read/28060453/model-based-economic-evaluations-in-smoking-cessation-and-their-transferability-to-new-contexts-a-systematic-review
#18
REVIEW
Marrit L Berg, Kei Long Cheung, Mickaël Hiligsmann, Silvia Evers, Reina J A de Kinderen, Puttarin Kulchaitanaroaj, Subhash Pokhrel
AIMS: To identify different types of models used in economic evaluations of smoking cessation, analyse the quality of the included models examining their attributes and ascertain their transferability to a new context. METHODS: A systematic review of the literature on the economic evaluation of smoking cessation interventions published between 1996 and April 2015, identified via Medline, EMBASE, NHS EED, and HTA. Checklist-based quality of the included studies and transferability scores were based on European Network of Health Economic Evaluation Databases (EURONHEED) criteria...
January 6, 2017: Addiction
https://www.readbyqxmd.com/read/28049658/stage-and-subunit-specific-functions-of-polycomb-repressive-complex-2-in-bladder-urothelial-formation-and-regeneration
#19
Chunming Guo, Zarine R Balsara, Warren G Hill, Xue Li
Urothelium is the protective lining of the urinary tract. The mechanisms underlying urothelial formation and maintenance are largely unknown. Here, we report the stage-specific roles of PRC2 epigenetic regulators in embryonic and adult urothelial progenitors. Without Eed, the obligatory subunit of PRC2, embryonic urothelial progenitors demonstrate reduced proliferation with concomitant dysregulation of genes including Cdkn2a (p16), Cdkn2b (p15) and Shh. These mutants display premature differentiation of keratin 5-positive (Krt5(+)) basal cells and ectopic expression of squamous-like differentiation markers...
February 1, 2017: Development
https://www.readbyqxmd.com/read/28042859/a-novel-role-of-silibinin-as-a-putative-epigenetic-modulator-in-human-prostate-carcinoma
#20
Ioannis Anestopoulos, Aristeidis P Sfakianos, Rodrigo Franco, Katerina Chlichlia, Mihalis I Panayiotidis, David J Kroll, Aglaia Pappa
Silibinin, extracted from milk thistle (Silybum marianum L.), has exhibited considerable preclinical activity against prostate carcinoma. Its antitumor and chemopreventive activities have been associated with diverse effects on cell cycle, apoptosis, and receptor-dependent mitogenic signaling pathways. Here we hypothesized that silibinin's pleiotropic effects may reflect its interference with epigenetic mechanisms in human prostate cancer cells. More specifically, we have demonstrated that silibinin reduces gene expression levels of the Polycomb Repressive Complex 2 (PRC2) members Enhancer of Zeste Homolog 2 (EZH2), Suppressor of Zeste Homolog 12 (SUZ12), and Embryonic Ectoderm Development (EED) in DU145 and PC3 human prostate cancer cells, as evidenced by Real Time Polymerase Chain Reaction (RT-PCR)...
December 31, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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