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https://www.readbyqxmd.com/read/28818911/complete-genome-sequence-of-a-naturally-occurring-simian-foamy-virus-isolate-from-rhesus-macaque-sfvmmu_k3t
#1
Subhiksha Nandakumar, Eunhae H Bae, Arifa S Khan
The full-length genome sequence of a simian foamy virus (SFVmmu_K3T), isolated from a rhesus macaque (Macaca mulatta), was obtained using high-throughput sequencing. SFVmmu_K3T consisted of 12,983 bp and had a genomic organization similar to that of other SFVs, with long terminal repeats (LTRs) and open reading frames for Gag, Pol, Env, Tas, and Bet.
August 17, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28818518/seladelpar-mbx-8025-a-selective-ppar-%C3%AE-agonist-in-patients-with-primary-biliary-cholangitis-with-an-inadequate-response-to-ursodeoxycholic-acid-a-double-blind-randomised-placebo-controlled-phase-2-proof-of-concept-study
#2
David Jones, Pol F Boudes, Mark G Swain, Christopher L Bowlus, Michael R Galambos, Bruce R Bacon, Yvonne Doerffel, Norman Gitlin, Stuart C Gordon, Joseph A Odin, David Sheridan, Markus-Alexander Wörns, Virginia Clark, Linsey Corless, Heinz Hartmann, Mark E Jonas, Andreas E Kremer, George F Mells, Peter Buggisch, Bradley L Freilich, Cynthia Levy, John M Vierling, David E Bernstein, Marek Hartleb, Ewa Janczewska, Fedja Rochling, Hemant Shah, Mitchell L Shiffman, John H Smith, Yun-Jung Choi, Alexandra Steinberg, Monika Varga, Harinder Chera, Robert Martin, Charles A McWherter, Gideon M Hirschfield
BACKGROUND: Many patients with primary biliary cholangitis have an inadequate response to first-line therapy with ursodeoxycholic acid. Seladelpar is a potent, selective agonist for the peroxisome proliferator-activated receptor-delta (PPAR-δ), which is implicated in bile acid homoeostasis. This first-in-class study evaluated the anti-cholestatic effects and safety of seladelpar in patients with an inadequate response to ursodeoxycholic acid. METHODS: The study was a 12-week, double-blind, placebo-controlled, phase 2 trial of patients with alkaline phosphatase of at least 1·67 times the upper limit of normal (ULN) despite treatment with ursodeoxycholic acid...
August 14, 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28818226/percutaneous-ultrasound-guided-sclerotherapy-with-polidocanol-microfoam-for-lymphatic-malformations
#3
Takashi Yamaki, Yumiko Sasaki, Yuki Hasegawa, Atsuyoshi Osada, Hisato Konoeda, Atsumori Hamahata, Motohiro Nozaki, Hiroyuki Sakurai
BACKGROUND: Lymphatic malformations (LMs) are low-flow congenital lesions that consist of cysts of varying size. Sclerotherapy with intralesional bleomycin and OK-432 has been reported to yield dramatically beneficial results for this disorder. However, inflammation-related symptoms are often seen after treatment with these sclerosing agents. On the other hand, polidocanol (POL) is reportedly associated with fewer allergic and inflammatory reactions. Up to now, however, very few reports have documented the use of POL microfoam for treatment of LMs...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28818067/a-longitudinal-study-of-the-implementation-experiences-of-the-australian-national-disability-insurance-scheme-investigating-transformative-policy-change
#4
Gemma Carey, Helen Dickinson
BACKGROUND: Internationally there has been a growth in the use of publicly funded service markets as a mechanism to deliver health and social services. This has accompanied the emergence of 'self-directed care' in a number of different policy areas including disability and aged care - often referred to as 'personalisation' (Giaimo and Manow, Comp. Pol Stud 32:967-1000, 1999; Needham, Public Money Manage 30:136-8, 2010; [Hood], [The Idea of Joined-up Government: A Historical Perspective], [2005]; Klijn and Koppenjan, Public Manage 2:437-54, 2000, Greener, Policy Polit 36:93-108, 2008)...
August 17, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28816581/novel-functions-for-chromatin-dynamics-in-mrna-biogenesis-beyond-transcription
#5
Catherine Dargemont, Anna Babour
The first step of gene expression results in the production of mRNA ribonucleoparticles (mRNPs) that are exported to the cytoplasm via the NPC for translation into the cytoplasm. During this process, the mRNA molecule synthesized by RNA polymerase II (Pol II) undergoes extensive maturation, folding and packaging events that are intimately coupled to its synthesis. All these events take place in a chromatin context and it is therefore not surprising that a growing number of studies recently reported specific contributions of chromatin dynamics to various steps of mRNP biogenesis...
August 17, 2017: Nucleus
https://www.readbyqxmd.com/read/28811466/time-lapse-crystallography-snapshots-of-a-double-strand-break-repair-polymerase-in-action
#6
Joonas A Jamsen, William A Beard, Lars C Pedersen, David D Shock, Andrea F Moon, Juno M Krahn, Katarzyna Bebenek, Thomas A Kunkel, Samuel H Wilson
DNA polymerase (pol) μ is a DNA-dependent polymerase that incorporates nucleotides during gap-filling synthesis in the non-homologous end-joining pathway of double-strand break repair. Here we report time-lapse X-ray crystallography snapshots of catalytic events during gap-filling DNA synthesis by pol μ. Unique catalytic intermediates and active site conformational changes that underlie catalysis are uncovered, and a transient third (product) metal ion is observed in the product state. The product manganese coordinates phosphate oxygens of the inserted nucleotide and PPi...
August 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28808009/a-protein-complex-regulates-rna-processing-of-intronic-heterochromatin-containing-genes-in-arabidopsis
#7
Cheng-Guo Duan, Xingang Wang, Lingrui Zhang, Xiansong Xiong, Zhengjing Zhang, Kai Tang, Li Pan, Chuan-Chih Hsu, Huawei Xu, W Andy Tao, Heng Zhang, Jian-Kang Zhu
In several eukaryotic organisms, heterochromatin (HC) in the introns of genes can regulate RNA processing, including polyadenylation, but the mechanism underlying this regulation is poorly understood. By promoting distal polyadenylation, the bromo-adjacent homology (BAH) domain-containing and RNA recognition motif-containing protein ASI1 and the H3K9me2-binding protein EDM2 are required for the expression of functional full-length transcripts of intronic HC-containing genes in Arabidopsis Here we report that ASI1 and EDM2 form a protein complex in vivo via a bridge protein, ASI1-Immunoprecipitated Protein 1 (AIPP1), which is another RNA recognition motif-containing protein...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807928/role-of-translesion-synthesis-dna-polymerases-in-dna-replication-in-the-presence-of-a-weak-dna-polymerase-%C3%AE-in-saccharomyces-cerevisiae
#8
Likui Zhang, Yanchao Huang, Xinyuan Zhu, Yuxiao Wang, Haoqiang Shi, Min Chen, Kunming Dong, Xiaojian Zhou
Translesion synthesis (TLS) DNA polymerases (pols) are often mutagenic for lesion bypass due to their low fidelity. Here, we isolated a weak yeast DNA pol δ mutant that possessed amino acid substitution V592G by genetic selection. The pol3-V592G cells were sensitive to hydroxyurea (HU), which increases the requirement for dNTPs, and their HU sensitivity was suppressed by L612M substitution. We also demonstrated that V592G substitution suppressed the phosphonoacetic acid (PAA) sensitivity of pol3-L612M cells, suggesting a cycle of mutual suppression in the HU- and PAA-sensitive yeast DNA pol δ mutants as similarly observed in the optA1- and PAA-sensitive T4 DNA pol mutants...
August 14, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28807902/h2av-facilitates-h3s10-phosphorylation-but-is-not-required-for-heat-shock-induced-chromatin-decondensation-or-transcriptional-elongation
#9
Yeran Li, Chao Wang, Weili Cai, Saheli Sengupta, Michael Zavortink, Huai Deng, Jack Girton, Jørgen Johansen, Kristen M Johansen
A model has been proposed where JIL-1 kinase-mediated H3S10 and H2Av phosphorylation is required for transcriptional elongation and heat shock-induced chromatin decondensation to occur. However, here we show that while H3S10 phosphorylation is indeed compromised in the H2Av null mutant we find that chromatin decondensation at heat shock loci is unaffected both in the absence of JIL-1 as well as of H2Av and that there is no discernable decrease in the elongating form of Pol II in either mutant. Furthermore, mRNA for the major heat shock protein Hsp70 is transcribed at robust levels in both H2Av and JIL-1 null mutants...
August 14, 2017: Development
https://www.readbyqxmd.com/read/28807685/an-rna-polymerase-ii-driven-ebola-virus-minigenome-system-as-an-advanced-tool-for-antiviral-drug-screening
#10
Emily V Nelson, Jennifer R Pacheco, Adam Hume, Tessa N Cressey, Laure R Deflubé, John B Ruedas, John H Connor, Hideki Ebihara, Elke Mühlberger
Ebola virus (EBOV) causes a severe disease in humans with the potential for significant international public health consequences. Currently, treatments are limited to experimental vaccines and therapeutics. Therefore, research into prophylaxis and antiviral strategies to combat EBOV infections is of utmost importance. The requirement for high containment laboratories to study EBOV infection is a limiting factor for conducting EBOV research. To overcome this issue, minigenome systems have been used as valuable tools to study EBOV replication and transcription mechanisms and to screen for antiviral compounds at biosafety level 2...
August 11, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28807060/current-dietary-supplement-use-of-australian-military-veterans-of-middle-east-operations
#11
Jolieke C van der Pols, Jeeva Kanesarajah, Alison Bell, Chi-Wai Lui
OBJECTIVE: To assess patterns and levels of dietary supplement use among Australian Defence Forces, previously deployed to the Middle East Area of Operations. DESIGN: A cross-sectional study. Participants of a large survey self-completed questions about dietary supplement use, health status, personal and job-related characteristics, and lifestyle factors. Frequency of current use of supplements was assessed in three categories (bodybuilding, energy and weight loss)...
August 15, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28806503/identification-of-the-dimer-exchange-interface-of-the-bacterial-dna-damage-response-protein-umud
#12
David A Murison, Rebecca C Timson, Bilyana Koleva, Michael Ordazzo, Penny J Beuning
The Escherichia coli SOS response, an induced DNA damage response pathway, confers survival on bacterial cells by providing accurate repair mechanisms as well as the potentially mutagenic pathway translesion synthesis (TLS). The umuD gene products are upregulated after DNA damage and play roles in both non-mutagenic and mutagenic aspects of the SOS response. Full-length UmuD is expressed as a homodimer of 139-amino-acid subunits, which eventually cleaves its N-terminal 24 amino acids to form UmuD'. The cleavage product, UmuD', together with UmuC, form the Y-family polymerase DNA Pol V (UmuD'2C) capable of performing TLS...
August 14, 2017: Biochemistry
https://www.readbyqxmd.com/read/28805387/polymyxin-binding-to-the-bacterial-outer-membrane-reveals-cation-displacement-and-increasing-membrane-curvature-in-susceptible-but-not-in-resistant-lps-chemotypes
#13
Denys Ewerton da Silva Santos, Laércio Pol-Fachin, Roberto D Lins, Thereza A Soares
Lipid-A is the causative agent of Gram-negative sepsis and responsible for increasingly high mortality rate among hospitalized patients. Compounds that bind Lipid-A can limit this inflammatory process. The cationic antimicrobial peptide polymyxin B (Pmx-B) is one of the simplest molecules capable of selectively bind to Lipid-A, and may serve as a model for further development of Lipid-A binding agents. Gram-negative bacteria resistance to Pmx-B relies on the upregulation of a number of regulatory systems, which promote chemical modifications of the LPS structure, and leads to major changes in the physical-chemical properties of the outer membrane...
August 14, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28803729/the-ground-state-and-evolution-of-promoter-region-directionality
#14
Yi Jin, Umut Eser, Kevin Struhl, L Stirling Churchman
Eukaryotic promoter regions are frequently divergently transcribed in vivo, but it is unknown whether the resultant antisense RNAs are a mechanistic by-product of RNA polymerase II (Pol II) transcription or biologically meaningful. Here, we use a functional evolutionary approach that involves nascent transcript mapping in S. cerevisiae strains containing foreign yeast DNA. Promoter regions in foreign environments lose the directionality they have in their native species. Strikingly, fortuitous promoter regions arising in foreign DNA produce equal transcription in both directions, indicating that divergent transcription is a mechanistic feature that does not imply a function for these transcripts...
August 9, 2017: Cell
https://www.readbyqxmd.com/read/28803101/persulfate-oxidation-assisted-hydrochar-production-from-platanus-orientalis-leaves-physiochemical-and-combustion-characteristics
#15
Lin Gu, Sifan Wu, Binglian Li, Haifeng Wen, Daofang Zhang, Jianfeng Ye, Liang Wang
Platanus Orientalis Leaves (POL), a widely planted tree in parks and along streets, was employed by sequential persulfate oxidation (Fe(2+)and persulfate) and hydrothermal treatment (HTC) to improve the thermal stability, energy yield and combustion behavior of hydrochars (HCs). Higher heating values (HHVs) of HCs derived from persulfate pretreated POL was increased by 30.5% at mild HTC temperature (i.e., 210°C) as compared to char without pretreatment. Elevating Fe(2+)/persulfate ratio to 0.2 enables HCs with high fractions of lignin, thus promoting the energy yield going up to 64...
August 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28800143/immunohistochemistry-reveals-an-increased-proportion-of-myc-positive-cells-in-subcutaneous-panniculitis-like-t-cell-lymphoma-compared-with-lupus-panniculitis
#16
Sebastian Fernandez-Pol, Danielle De Stefano, Jinah Kim
BACKGROUND: Subcutaneous panniculitis-like T-cell lymphoma (SPTCL) is a malignant primary cutaneous T-cell lymphoma that shares significant clinical, histopathologic, and immunophenotypic overlap with lupus erythematosus panniculitis (LEP). METHODS: We performed immunohistochemistry for the MYC oncoprotein on 23 cases of SPTCL (one CD8 negative) and 12 cases of LEP to evaluate if there are quantitative or qualitative differences in protein expression of this marker in these entities...
August 11, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28796815/effect-of-teriflunomide-on-cortex-basal-ganglia-thalamus-cxbgth-circuit-glutamatergic-dysregulation-in-the-theiler-s-murine-encephalomyelitis-virus-mouse-model-of-multiple-sclerosis
#17
Claire M Modica, Ferdinand Schweser, Michelle L Sudyn, Nicola Bertolino, Marilena Preda, Paul Polak, Danielle M Siebert, Jacqueline C Krawiecki, Michele Sveinsson, Jesper Hagemeier, Michael G Dwyer, Suyog Pol, Robert Zivadinov
BACKGROUND: Pathology of gray matter is associated with development of physical and cognitive disability in patients with multiple sclerosis. In particular, glutamatergic dysregulation in the cortex-basal ganglia-thalamus (CxBGTh) circuit could be associated with decline in these behaviors. OBJECTIVES: To investigate the effect of an immunomodulatory therapy (teriflunomide, Aubagio®) on changes of the CxBGTh loop in the Theiler's Murine Encephalomyelitis Virus, (TMEV) mouse model of MS...
2017: PloS One
https://www.readbyqxmd.com/read/28795954/the-first-characterization-of-hiv-1-subtypes-and-drug-resistance-mutations-among-antiretrovirally-treated-patients-in-kermanshah-iran
#18
Reza Golmohammadi, Kazem Baesi, Abdolvahab Moradi, Molood Farrokhi, Willi McFarland, Shahryar Parsamajd
BACKGROUND: Insufficient therapy during HIV-1 replication can promote the emergence of drug-resistant strains, reduce the effectiveness of antiretroviral treatment (ART), and increase the likelihood of the onward transmission of drug-resistant viruses. We characterized, for the first time, the prevalence of HIV-1 subtypes and drug resistance mutations in a western region of Iran. METHODS: This study was conducted among 122 patients on ART at a major referral center in Kermanshah, Iran...
August 10, 2017: Intervirology
https://www.readbyqxmd.com/read/28795863/a-new-era-of-studying-p53-mediated-transcription-activation
#19
Wei-Li Liu, Robert A Coleman, Sameer K Singh
To prevent tumorigenesis, p53 stimulates transcription by facilitating the recruitment of the transcription machinery on target gene promoters. Cryo-Electron Microscopy studies on p53-bound RNA Polymerase II (Pol II) reveal that p53 structurally regulates Pol II to affect its DNA binding and elongation, providing new insights into p53-mediated transcriptional regulation.
August 10, 2017: Transcription
https://www.readbyqxmd.com/read/28795354/drug-resistance-mutation-profiles-of-the-drug-na%C3%A3-ve-and-first-line-regimen-treated-hiv-1-infected-population-of-suzhou-china
#20
Tingting Li, Feng Qian, Ting Yuan, Weilu Xu, Li Zhu, Jinlong Huang, Haiyan Wang, Yueping Zhu, Yinling Wang, Xiaohong Li, Saihong Gu, Zhuqing Tan, Hui Chen, Xiangrong Luo, Wei Zhu, Wenjuan Lu, Ping Xu, Ming Li, Yuying Chen, Yong Gao, Rongge Yang, Chuanwu Zhu, Binlian Sun
Little is known about the prevalence of drug-resistant mutations in HIV-1-positive individuals in Suzhou, China. To elucidate the transmitted drug resistance (TDR) and acquired drug resistance mutation (ADR) profiles, we collected blood specimens from 127 drug-naïve and 117 first-line drug-treated HIV-1-infected individuals sampled from 2014 to 2016 in Suzhou. We successfully amplified pol fragments from 100 drug-naïve and 20 drug-treated samples. We then determined the drug-resistant mutations to protease (PR) and reverse-transcriptase (RT) inhibitors according to the Stanford drug resistance database...
August 7, 2017: Virologica Sinica
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