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https://www.readbyqxmd.com/read/28339591/comparison-of-the-force-levels-among-labial-and-lingual-self-ligating-and-conventional-brackets-in-simulated-misaligned-teeth
#1
Ahmad Alobeid, Tarek El-Bialy, Said Khawatmi, Cornelius Dirk, Andreas Jäger, Christoph Bourauel
Background/objective: The aim of this study was to evaluate force levels exerted by levelling arch wires with labial and lingual conventional and self-ligating brackets. Materials/methods: The tested orthodontic brackets were of the 0.022-in slot size for labial and 0.018-in for lingual brackets and were as follows: 1. Labial brackets: (i) conventional bracket (GAC-Twin, Dentsply), (ii) passive self-ligating (SL) brackets (Damon-Q®, ORMCO; Ortho classic H4™, Orthoclassic; FLI®SL, Rocky Mountain Orthodontics) and (iii) active SL brackets (GAC In-Ovation®C, DENTSPLY and SPEED™, Strite)...
January 25, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28334966/structural-and-mechanistic-insights-into-regulation-of-hbo1-histone-acetyltransferase-activity-by-brpf2
#2
Ye Tao, Chen Zhong, Junjun Zhu, Shutong Xu, Jianping Ding
HBO1, a member of the MYST family of histone acetyltransferases (HATs), is required for global acetylation of histone H3K14 and embryonic development. It functions as a catalytic subunit in multisubunit complexes comprising a BRPF1/2/3 or JADE1/2/3 scaffold protein, and two accessory proteins. BRPF2 has been shown to be important for the HAT activity of HBO1 toward H3K14. Here we demonstrated that BRPF2 can regulate the HAT activity of HBO1 toward free H3 and H4, and nucleosomal H3. Particularly, a short N-terminal region of BRPF2 is sufficient for binding to HBO1 and can potentiate its activity toward H3K14...
February 24, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334823/h3-y-discriminates-between-hira-and-daxx-chaperone-complexes-and-reveals-unexpected-insights-into-human-daxx-h3-3-h4-binding-and-deposition-requirements
#3
Lisa-Maria Zink, Erwan Delbarre, H Christian Eberl, Eva C Keilhauer, Clemens Bönisch, Sebastian Pünzeler, Marek Bartkuhn, Philippe Collas, Matthias Mann, Sandra B Hake
Histone chaperones prevent promiscuous histone interactions before chromatin assembly. They guarantee faithful deposition of canonical histones and functionally specialized histone variants into chromatin in a spatial- and temporally-restricted manner. Here, we identify the binding partners of the primate-specific and H3.3-related histone variant H3.Y using several quantitative mass spectrometry approaches, and biochemical and cell biological assays. We find the HIRA, but not the DAXX/ATRX, complex to recognize H3...
February 21, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28332927/leptospira-spp-in-small-mammals-from-areas-with-low-and-high-human-hantavirus-incidences-in-south-west-germany
#4
Anna Obiegala, Christoph Albrecht, Maysaa Dafalla, Stephan Drewes, Carolin Oltersdorf, Hendrik Turni, Christian Imholt, Jens Jacob, Christiane Wagner-Wiening, Rainer G Ulrich, Martin Pfeffer
INTRODUCTION: Leptospirosis is caused by Leptospira spp. and is considered the most widespread zoonotic disease worldwide. It mimics nephropathia epidemica in humans, a disease mainly caused by Puumala hantavirus (PUUV). Small mammals are reservoirs for Leptospira spp. and PUUV. Seewis virus (SWSV) is a shrew-borne hantavirus with unknown pathogenicity. The objective of this study was to estimate the prevalence for Leptospira spp. and the frequency of Leptospira-hantavirus co-infections in small mammals collected at locations with high and low incidences in humans...
March 23, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28329394/intermediate-follow-up-of-pediatric-patients-with-hemolytic-uremic-syndrome-during-the-2011-outbreak-caused-by-e-coli-o104-h4
#5
Sebastian Loos, Wiebke Aulbert, Bernd Hoppe, Thurid Ahlenstiel-Grunow, Birgitta Kranz, Charlotte Wahl, Hagen Staude, Alexander Humberg, Kerstin Benz, Martin Krause, Martin Pohl, Max C Liebau, Raphael Schild, Johanna Lemke, Ortraud Beringer, Dominik Müller, Christoph Härtel, Marianne Wigger, Udo Vester, Martin Konrad, Dieter Haffner, Lars Pape, Jun Oh, Markus J Kemper
Background.: In 2011 Escherichia coli O104:H4 caused an outbreak with over 800 cases of hemolytic uremic syndrome (HUS) in Germany, including 90 children. Data on the intermediate outcome in children after HUS due to E. coli O104:H4 have been lacking. Methods.: Follow-up data were gathered retrospectively from the medical records of patients who had been included in the German Pediatric HUS Registry during the 2011 outbreak. Results.: A total of 72/89 (81%) of the patients was included after a median follow-up of 3...
March 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28326671/shape-assisted-self-organization-in-highly-disordered-liquid-crystal-phases
#6
Keiki Kishikawa, Yusuke Yamamoto, Go Watanabe, Ayaka Kawamura, Michinari Kohri, Tatsuo Taniguchi
In achiral rod-like molecules, a nematic phase is the most disordered liquid crystal phase, which only has one-directional order in the direction of the molecular long axis. A dumbbell-shaped molecule (compound 3: R-C6 H10 -CH=CH-C6 H4 -CH=CH-C6 H10 -R, (R=nC5 H11 )), and its liquid crystal phase (X phase) are reported, which exhibit high scattering without thermal fluctuation between two nematic phases under a polarized light optical microscope. The X phase was investigated by X-ray diffraction, scanning electron microscopy, atomic force microscopy, and molecular dynamics simulation...
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28325750/molecular-pathways-evaluating-the-potential-for-b7-h4-as-an-immunoregulatory-target
#7
Heather L MacGregor, Pamela S Ohashi
With the clinical success of CTLA-4 and PD-1 blockade in treating malignancies, there is tremendous interest in finding new ways to augment anti-tumor responses by targeting other inhibitory molecules. In this review, we describe one such molecule. B7-H4, a member of the B7 family of immunoregulatory proteins, inhibits T cell proliferation and cytokine production through ligation of an unknown receptor expressed by activated T cells. Notably, B7-H4 protein expression is observed in a high proportion of patients' tumors across a wide variety of malignancies...
March 21, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28323055/a-6-alkylsalicylate-histone-acetyltransferase-inhibitor-inhibits-histone-acetylation-and-pro-inflammatory-gene-expression-in-murine-precision-cut-lung-slices
#8
Thea van den Bosch, Niek G J Leus, Hannah Wapenaar, Alexander Boichenko, Jos Hermans, Rainer Bischoff, Hidde J Haisma, Frank J Dekker
Lysine acetylations are post-translational modifications of cellular proteins, that are crucial in the regulation of many cellular processes. Lysine acetylations on histone proteins are part of the epigenetic code regulating gene transcription and are installed by histone acetyltransferases. Observations that inflammatory lung diseases, such as asthma and chronic obstructive pulmonary disease, are characterized by increased histone acetyltransferase activity indicate that development of small molecule inhibitors for these enzymes might be a valuable approach towards new therapies for these diseases...
March 16, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28322915/regulation-of-nucleosome-stacking-and-chromatin-compaction-by-the-histone-h4-n-terminal-tail-h2a-acidic-patch-interaction
#9
Qinming Chen, Renliang Yang, Nikolay Korolev, Chuan Fa Liu, Lars Nordenskiöld
Chromatin folding and dynamics are critically dependent on nucleosome - nucleosome interactions with important contributions from inter-nucleosome binding of the histone H4 N-terminal tail K16-R23 domain to the surface of the H2A/H2B dimer. The H4 Lys16 plays a pivotal role in this regard. Using in vitro reconstituted 12-mer nucleosome arrays we have investigated the mechanism of the H4 N-terminal tail in maintaining nucleosome-nucleosome stacking and mediating intra- and inter-array chromatin compaction, with emphasis on the role of K16 and the positive charge region, R17-R23...
March 16, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28317157/design-and-synthesis-of-novel-anti-plasmodial-histone-deacetylase-inhibitors-containing-an-alkoxyamide-connecting-unit
#10
Leandro A Alves Avelar, Jana Held, Jessica A Engel, Parichat Sureechatchaiyan, Finn K Hansen, Alexandra Hamacher, Matthias U Kassack, Benjamin Mordmüller, Katherine T Andrews, Thomas Kurz
Despite recent declines in mortality, malaria remains an important global health problem. New therapies are needed, including new drugs with novel modes of action compared to existing agents. Among new potential therapeutic targets for malaria, inhibition of parasitic histone deacetylases (HDACs) is a promising approach. Homology modeling of PfHDAC1, a known target of some anti-plasmodial HDAC inhibitors, revealed a unique threonine residue at the rim of the active site in close proximity to the location of the cap group of vorinostat-type HDAC inhibitors...
March 20, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28315525/insights-into-the-molecular-architecture-and-histone-h3-h4-deposition-mechanism-of-yeast-chromatin-assembly-factor-1
#11
Paul Victor Sauer, Jennifer Timm, Danni Liu, David Sitbon, Elisabetta Boeri-Erba, Christophe Velours, Norbert Mücke, Jörg Langowski, Françoise Ochsenbein, Geneviève Almouzni, Daniel Panne
How the very first step in nucleosome assembly, deposition of histone H3-H4 as tetramers or dimers on DNA, is accomplished remains largely unclear. Here we report that yeast chromatin assembly factor 1 (CAF1), a conserved histone chaperone complex that deposits H3-H4 during DNA replication, binds a single H3-H4 heterodimer in solution. We identify a new DNA binding domain in the large Cac1 subunit of CAF1, which is required for high-affinity DNA binding by the CAF1 three-subunit complex, and which is distinct from the previously described C-terminal winged-helix domain...
March 18, 2017: ELife
https://www.readbyqxmd.com/read/28315523/dna-mediated-association-of-two-histone-bound-caf-1-complexes-drives-tetrasome-assembly-in-the-wake-of-dna-replication
#12
Francesca Mattiroli, Yajie Gu, Tejas Yadav, Jeremy L Balsbaugh, Michael R Harris, Eileen S Findlay, Yang Liu, Catherine A Radebaugh, Laurie A Stargell, Natalie G Ahn, Iestyn Whitehouse, Karolin Luger
Nucleosome assembly in the wake of DNA replication is a key process that regulates cell identity and survival. Chromatin assembly factor 1 (CAF-1) is a H3-H4 histone chaperone that associates with the replisome and orchestrates chromatin assembly following DNA synthesis. Little is known about the mechanism and structure of this key complex. Here we investigate the CAF-1•H3-H4 binding mode and the mechanism of nucleosome assembly. We show that CAF-1 binding to a H3-H4 dimer activates the Cac1 winged helix domain interaction with DNA...
March 18, 2017: ELife
https://www.readbyqxmd.com/read/28301233/identification-of-type-a-influenza-viruses-from-wild-birds-on-the-delmarva-peninsula-2007-10
#13
Lauren A Preskenis, Brian S Ladman, Jack Gelb
Wild waterfowl and shorebirds in the Delaware-Maryland-Virginia (Delmarva) Peninsula region within the Atlantic Flyway were sampled as part of the Early Detection of Highly Pathogenic H5N1 Avian Influenza (AI) in Wild Migratory Birds program. The U.S. Department of Agriculture (USDA) and state wildlife agencies submitted 7858 samples for AI virus (AIV) testing by real-time reverse transcription PCR (rRT-PCR) to the University of Delaware Poultry Health System from April 2007 to March 2011. Virus isolation attempts were performed on samples with matrix gene cycle threshold (Ct) values ≤33...
March 2017: Avian Diseases
https://www.readbyqxmd.com/read/28301229/low-pathogenic-avian-influenza-viruses-in-wild-migratory-waterfowl-in-a-region-of-high-poultry-production-delmarva-maryland
#14
Diann J Prosser, Christine L Densmore, Larry J Hindman, Deborah D Iwanowicz, Chris A Ottinger, Luke R Iwanowicz, Cindy P Driscoll, Jessica L Nagel
Migratory waterfowl are natural reservoirs for low pathogenic avian influenza viruses (AIVs) and may contribute to the long-distance dispersal of these pathogens as well as spillover into domestic bird populations. Surveillance for AIVs is critical to assessing risks for potential spread of these viruses among wild and domestic bird populations. The Delmarva Peninsula on the east coast of the United States is both a key convergence point for migratory Atlantic waterfowl populations and a region with high poultry production (>4,700 poultry meat facilities)...
March 2017: Avian Diseases
https://www.readbyqxmd.com/read/28301084/the-effect-of-verapamil-a-p-glycoprotein-inhibitor-on-the-pharmacokinetics-of-peficitinib-an-orally-administered-once-daily-jak-inhibitor
#15
Tong Zhu, Corrie Howieson, Tomasz Wojtkowski, Jay P Garg, David Han, Ogert Fisniku, James Keirns
Peficitinib is an orally administered, once-daily Janus kinase inhibitor currently in development for the treatment of rheumatoid arthritis. It has been shown to be a P-glycoprotein (P-gp) substrate in vitro. The effects of verapamil, an inhibitor of the efflux pump P-gp, on the pharmacokinetic profile of peficitinib were assessed in this open-label, single-center, single-sequence, crossover drug-interaction study. Twenty-four healthy volunteers received a single 150-mg dose of peficitinib on days 1 and 12 of a 14-day treatment period and received verapamil 80 mg 3 times daily on days 5-14...
March 16, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28297710/corrigendum-the-histone-h4-lysine-16-acetyltransferase-hmof-regulates-the-outcome-of-autophagy
#16
Jens Füllgrabe, Melinda A Lynch-Day, Nina Heldring, Wenbo Li, Robert B Struijk, Qi Ma, Ola Hermanson, Michael G Rosenfeld, Daniel J Klionsky, Bertrand Joseph
No abstract text is available yet for this article.
March 15, 2017: Nature
https://www.readbyqxmd.com/read/28295881/manganese-silylene-hydride-complexes-synthesis-and-reactivity-with-ethylene-to-afford-silene-hydride-complexes
#17
Jeffrey S Price, David J H Emslie, James F Britten
Reaction of the ethylene hydride complex trans-[(dmpe)2 MnH(C2 H4 )] (1) with Et2 SiH2 at 20 °C afforded the silylene hydride [(dmpe)2 MnH(=SiEt2 )] (2 a) as the trans-isomer. By contrast, reaction of 1 with Ph2 SiH2 at 60 °C afforded [(dmpe)2 MnH(=SiPh2 )] (2 b) as a mixture of the cis (major) and trans (minor) isomers, featuring a Mn-H-Si interaction in the former. The reaction to form 2 b also yielded [(dmpe)2 MnH2 (SiHPh2 )] (3 b); [(dmpe)2 MnH2 (SiHR2 )] (R=Et (3 a) and Ph (3 b)) were accessed cleanly by reaction of 2 a and 2 b with H2 , and the analogous reactions with D2 afforded [(dmpe)2 MnD2 (SiHR2 )] exclusively...
March 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28292308/surveillance-of-avian-influenza-viruses-in-south-korea-between-2012-and-2014
#18
Eun-Kyoung Lee, Hyun-Mi Kang, Byung-Min Song, Yu-Na Lee, Gyeong-Beum Heo, Hee-Soo Lee, Youn-Jeong Lee, Jae-Hong Kim
BACKGROUND: National surveillance of avian influenza virus (AIV) in South Korea has been annually conducted for the early detection of AIV and responses to the introduction of highly pathogenic avian influenza (HPAI) virus. In this study, we report on a nationwide surveillance study of AIV in domestic poultry and wild birds in South Korea between 2012 and 2014. METHODS: During the surveillance programs between 2012 and 2014, 141,560 samples were collected. Of these, 102,199 were from poultry farms, 8215 were from LBMs, and 31,146 were from wild bird habitats...
March 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28290371/release-of-dipeptidyl-peptidase-iv-dpp-iv-inhibitory-peptides-from-milk-protein-isolate-mpi-during-enzymatic-hydrolysis
#19
Alice B Nongonierma, Caterina Mazzocchi, Sara Paolella, Richard J FitzGerald
The release of dipeptidyl peptidase IV (DPP-IV) inhibitory peptides from bovine milk protein isolate (MPI) during trypsin hydrolysis was studied using a design of experiments (DOE) approach. A 3 factor×3 level DOE including temperature (40, 50 and 60°C), enzyme to substrate ratio (E:S; 0.50, 1.25 and 2.00% (w/w)) and hydrolysis time (60, 150 and 240min) was used during the generation of 15 hydrolysates (H1-H15). The degree of hydrolysis (DH) varied between 6.98±0.31 (H8) to 12.75±0.62% (H10). The DPP-IV half maximal inhibitory concentration (IC50) ranged from 0...
April 2017: Food Research International
https://www.readbyqxmd.com/read/28289918/geodermatophilus-daqingensis-sp-nov-isolated-from-petroleum-contaminated-soil
#20
Yang Wang, Liguo Zhang, Xiaofei Zhang, Jinying Huang, Yu Zhao, Yuanling Zhao, Jianxin Liu, Cui Huang, Jing Wang, Yingying Hu, Guoling Ren, Xiuhong Xu
A novel Gram-positive actinobacterium, designated WT-2-1(T), was isolated from a sample of petroleum-contaminated soil collected in Daqing, Heilongjiang province, China and characterised using a polyphasic taxonomic approach. The optimal growth for strain WT-2-1(T) was found to be at 25-35 °C and at pH 6.0-9.0 and with 0-4% (w/v) NaCl, forming blackish green-coloured colonies. Chemotaxonomic and molecular characteristics of the isolate match those described for members of the genus Geodermatophilus. The peptidoglycan was found to contain meso-diaminopimelic acid; galactose, glucose and xylose were detected as diagnostic sugars...
March 13, 2017: Antonie Van Leeuwenhoek
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