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https://www.readbyqxmd.com/read/28214021/arfi-elastography-changes-after-direct-acting-antiviral-treatment-in-transplanted-livers-with-relapse-of-hepatitis-c-virus-infection
#1
M Alfageme Zubillaga, T Fontanilla Echeveste, I Pérez González, A Royuela Vicente, A M Duca, R M Ruiz Peralbo, C González Hernando
OBJECTIVE: To evaluate the changes in the values obtained in acoustic radiation force impulse (ARFI) elastography of the liver after antiviral treatment in patients with liver transplants and hepatitis C virus (HVC) infection recurring after transplantation. MATERIAL AND METHODS: We studied 15 patients infected with HVC who had received liver transplants where an HVC infection recurring in the graft within one year after the transplant was treated with direct-acting antivirals...
February 14, 2017: Radiología
https://www.readbyqxmd.com/read/28213523/identification-of-regions-in-the-spt5-subunit-of-dsif-that-are-involved-in-promoter-proximal-pausing
#2
Yijun Qiu, David S Gilmour
DRB-sensitivity inducing factor (DSIF(2), or Spt4/5) is a conserved transcription elongation factor that both inhibits and stimulates transcription elongation in metazoans. In Drosophila and vertebrates, DSIF together with negative elongation factor (NELF) associates with RNA polymerase II (Pol II) during early elongation and causes Pol II to pause in the promoter proximal region of genes. The mechanism of how DSIF establishes pausing is not known. We constructed Spt5 mutant forms of DSIF and tested their capacity to restore promoter proximal pausing to DSIF-depleted Drosophila nuclear extracts...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28213497/mitochondrial-damage-elicits-a-tcdd-inducible-poly-adp-ribose-polymerase-mediated-antiviral-response
#3
Tatsuya Kozaki, Jun Komano, Daiki Kanbayashi, Michihiro Takahama, Takuma Misawa, Takashi Satoh, Osamu Takeuchi, Taro Kawai, Shigeomi Shimizu, Yoshiharu Matsuura, Shizuo Akira, Tatsuya Saitoh
The innate immune system senses RNA viruses by pattern recognition receptors (PRRs) and protects the host from virus infection. PRRs mediate the production of immune modulatory factors and direct the elimination of RNA viruses. Here, we show a unique PRR that mediates antiviral response. Tetrachlorodibenzo-p-dioxin (TCDD)-inducible poly(ADP ribose) polymerase (TIPARP), a Cysteine3 Histidine (CCCH)-type zinc finger-containing protein, binds to Sindbis virus (SINV) RNA via its zinc finger domain and recruits an exosome to induce viral RNA degradation...
February 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28213432/targeting-cancer-cells-with-bet-bromodomain-inhibitors
#4
Yali Xu, Christopher R Vakoc
Cancer cells are often hypersensitive to the targeting of transcriptional regulators, which may reflect the deregulated gene expression programs that underlie malignant transformation. One of the most prominent transcriptional vulnerabilities in human cancer to emerge in recent years is the bromodomain and extraterminal (BET) family of proteins, which are coactivators that link acetylated transcription factors and histones to the activation of RNA polymerase II. Despite unclear mechanisms underlying the gene specificity of BET protein function, small molecules targeting these regulators preferentially suppress the transcription of cancer-promoting genes...
February 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28213086/comparison-of-protocols-for-the-analysis-of-type-1-porcine-reproductive-and-respiratory-syndrome-virus-by-rt-pcr-using-oral-fluids
#5
Elisa Gibert, Gerard Martín-Valls, Enric Mateu
The detection of porcine reproductive and respiratory syndrome virus (PRRSV) in oral fluids (OF) by quantitative real-time polymerase chain reaction (qRT-PCR) is gaining increasing popularity. However, the different steps leading to a result have not been extensively evaluated. The aim of the present study was to examine the effect on the performance of qRT-PCR with different sampling materials, conditions of storage of the OF, the need for centrifuging OF, as well as to compare RNA extraction methods and PCR mixes...
February 14, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28212298/prevalence-and-clinical-impact-of-human-pegivirus-1-infection-in-hiv-1-infected-individuals-in-yunnan-china
#6
Zhijiang Miao, Li Gao, Yindi Song, Ming Yang, Mi Zhang, Jincheng Lou, Yue Zhao, Xicheng Wang, Yue Feng, Xingqi Dong, Xueshan Xia
Human Pegivirus-1 (HPgV-1) may have a beneficial impact on disease progression in human immunodeficiency virus-1 (HIV-1) infection. However, analysis of the genotypic diversity of HPgV-1 and its relevance to the progression of HIV-1 disease remains limited. A total of 1062 HIV-1-infected individuals were recruited in all sixteen prefectures of Yunnan province, China. The reverse transcription nested polymerase chain reaction (RT-nPCR), phylogenetic analyses, and clinical data analyses were used to detect HPgV-1 infection, determine genotype, and analyze HPgV-1 genotype impact on HIV-1 disease progression...
February 15, 2017: Viruses
https://www.readbyqxmd.com/read/28211909/a-crispr-cpf1-system-for-efficient-genome-editing-and-transcriptional-repression-in-plants
#7
Xu Tang, Levi G Lowder, Tao Zhang, Aimee A Malzahn, Xuelian Zheng, Daniel F Voytas, Zhaohui Zhong, Yiyi Chen, Qiurong Ren, Qian Li, Elida R Kirkland, Yong Zhang, Yiping Qi
Clustered regularly interspaced short palindromic repeats (CRISPR)-Cpf1 has emerged as an effective genome editing tool in animals. Here we compare the activity of Cpf1 from Acidaminococcus sp. BV3L6 (As) and Lachnospiraceae bacterium ND2006 (Lb) in plants, using a dual RNA polymerase II promoter expression system. LbCpf1 generated biallelic mutations at nearly 100% efficiency at four independent sites in rice T0 transgenic plants. Moreover, we repurposed AsCpf1 and LbCpf1 for efficient transcriptional repression in Arabidopsis, and demonstrated a more than tenfold reduction in miR159b transcription...
February 17, 2017: Nature Plants
https://www.readbyqxmd.com/read/28209778/role-for-dithiolopyrrolones-in-disrupting-bacterial-metal-homeostasis
#8
Andrew N Chan, Anthony L Shiver, Walter J Wever, Sayyeda Zeenat A Razvi, Matthew F Traxler, Bo Li
Natural products harbor unique and complex structures that provide valuable antibiotic scaffolds. With an increase in antibiotic resistance, natural products once again hold promise for new antimicrobial therapies, especially those with unique scaffolds that have been overlooked due to a lack of understanding of how they function. Dithiolopyrrolones (DTPs) are an underexplored class of disulfide-containing natural products, which exhibit potent antimicrobial activities against multidrug-resistant pathogens...
February 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28209525/stromal-vascular-fraction-shows-robust-wound-healing-through-high-chemotactic-and-epithelialization-property
#9
Dong-Sic Chae, Seongho Han, Mina Son, Sung-Whan Kim
BACKGROUND: Although human stromal vascular fraction (SVF) has been regarded as an attractive stem cell source, its therapeutic mechanism in wound healing has not been fully elucidated. AIMS: In this study, we investigated the molecular characteristics and therapeutic property of SVF for wound healing. METHODS: Microarray data showed that SVF cells are enriched with a higher level of wound healing or epithelium development-related genes and micro RNA...
February 13, 2017: Cytotherapy
https://www.readbyqxmd.com/read/28209402/chemokine-receptor-patterns-and-right-heart-failure-in-mechanical-circulatory-support
#10
Aditi Nayak, Colin Neill, Robert L Kormos, Luigi Lagazzi, Indrani Halder, Charles McTiernan, Jennifer Larsen, Ana Inashvili, Jeffrey Teuteberg, Timothy N Bachman, Karen Hanley-Yanez, Dennis M McNamara, Marc A Simon
BACKGROUND: Right ventricular failure (RVF) complicates 9% to 44% of left ventricular assist device (LVAD) implants post-operatively. Current prediction scores perform only modestly in validation studies, and do not include immune markers. Chemokines are inflammatory signaling molecules with a fundamental role in cardiac physiology and stress adaptation. In this study we investigated chemokine receptor regulation in LVAD recipients who develop RVF. METHODS: Expression of chemokine receptor (CCR) genes 3 to 8 were examined in the peripheral blood of 111 LVAD patients, collected 24 hours before implant...
December 23, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28209295/aluternative-regulation-for-gene-expression
#11
REVIEW
Ling-Ling Chen, Li Yang
Alu elements belong to the primate-specific SINE family of retrotransposons and constitute almost 11% of the human genome. Alus are transcribed by RNA polymerase (Pol) III and are inserted back into the genome with the help of autonomous LINE retroelements. Since Alu elements are preferentially located near to or within gene-rich regions, they can affect gene expression by distinct mechanisms of action at both DNA and RNA levels. In this review we focus on recent advances of how Alu elements are pervasively involved in gene regulation...
February 10, 2017: Trends in Cell Biology
https://www.readbyqxmd.com/read/28209205/long-noncoding-agap2-as1-is-activated-by-sp1-and-promotes-cell-proliferation-and-invasion-in-gastric-cancer
#12
Fuzhen Qi, Xianghua Liu, Hao Wu, Xiang Yu, Chenchen Wei, Xiaodan Huang, Guozhong Ji, Fengqi Nie, Keming Wang
BACKGROUND: Long noncoding RNAs (lncRNAs) have emerged as important regulators of tumorigenesis and cancer progression. Recently, the lncRNA AGAP2-AS1 was identified as an oncogenic lncRNA in human non-small cell lung cancer (NSCLC) and its elevated expression was linked to NSCLC development and progression. However, the expression pattern and molecular mechanism of AGAP2-AS1 in gastric cancer (GC) have not been characterized. METHODS: Bioinformatic analysis was performed to determine AGAP2-AS1 expression levels in the GC and normal tissues using gene profiling data from the Gene Expression Omnibus...
February 16, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28208987/bcl6-mrna-expression-level-in-invasive-duct-carcinoma-not-otherwise-specified
#13
Eman Badr, Eman Masoud, Asmaa Gaber Abdou, Marwa Serag Eldien
INTRODUCTION: B-Cell Lymphoma 6 (BCL6) has an oncogenic role in tumourigenesis of various malignancies. It represses genes involved in terminal differentiation and plays complementary role with Signal Transducer and Activator of Transcription 3 (STAT3) in triple-negative breast cancer cellular function. AIM: To evaluate the expression of BCL6 in cancer breast and determine its correlation with the clinico-pathological features including the molecular subtype of breast carcinoma...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208743/elaborated-action-of-the-human-primosome
#14
REVIEW
Andrey G Baranovskiy, Tahir H Tahirov
The human primosome is a 340-kilodalton complex of primase (DNA-dependent RNA polymerase) and DNA polymerase α, which initiates genome replication by synthesizing chimeric RNA-DNA primers for DNA polymerases δ and ϵ. Accumulated biochemical and structural data reveal the complex mechanism of concerted primer synthesis by two catalytic centers. First, primase generates an RNA primer through three steps: initiation, consisting of dinucleotide synthesis from two nucleotide triphosphates; elongation, resulting in dinucleotide extension; and termination, owing to primase inhibition by a mature 9-mer primer...
February 8, 2017: Genes
https://www.readbyqxmd.com/read/28208653/molecular-characterization-of-mycolactone-producing-mycobacteria-from-aquatic-environments-in-buruli-ulcer-non-endemic-areas-in-c%C3%A3-te-d-ivoire
#15
Marcellin B Tano, Christelle Dassi, Lydia Mosi, Marina Koussémon, Bassirou Bonfoh
Non-tuberculous mycobacteria (NTM), particularly mycolactone producing mycobacteria (MPM), are bacteria found in aquatic environments causing skin diseases in humans like Buruli ulcer (BU). Although the causative agent for BU, Mycobacterium ulcerans has been identified and associated with slow-moving water bodies, the real transmission route is still unknown. This study aimed to characterize MPMs from environmental aquatic samples collected in a BU non-endemic community, Adiopodoumé, in Côte d'Ivoire. Sixty samples were collected in four types of matrices (plant biofilms, water filtrate residues, plant detritus and soils) from three water bodies frequently used by the population...
February 11, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28207760/preferential-expression-of-scores-of-functionally-and-evolutionarily-diverse-dna-and-rna-binding-proteins-during-oxytricha-trifallax-macronuclear-development
#16
Zachary T Neeb, Daniel J Hogan, Sol Katzman, Alan M Zahler
During its sexual reproduction, the stichotrichous ciliate Oxytricha trifallax orchestrates a remarkable transformation of one of the newly formed germline micronuclear genomes. Hundreds of thousands of gene pieces are stitched together, excised from chromosomes, and replicated dozens of times to yield a functional somatic macronuclear genome composed of ~16,000 distinct DNA molecules that typically encode a single gene. Little is known about the proteins that carry out this process. We profiled mRNA expression as a function of macronuclear development and identified hundreds of mRNAs preferentially expressed at specific times during the program...
2017: PloS One
https://www.readbyqxmd.com/read/28207326/micro-rna-146a-but-not-irak1-is-associated-with-rheumatoid-arthritis-in-the-tunisian-population
#17
Hana Ben Hassine, Asma Boumiza, Rim Sghiri, Khadija Baccouche, Imen Boussaid, Ahlem Atig, Zahid Shakoor, Elyes Bouajina, Ramzi Zemni
BACKGROUND: Rheumatoid arthritis (RA) is characterized by the production of an array of proinflammatory cytokines through the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathway. Interleukin-1 receptor (IL-1R) and Toll-like receptors contain a common cytoplasmic motif the Toll/IL-1R (TIR) homology domain. This motif is required for NF-κB activation. IL-1R-associated kinase 1 (IRAK1) is a key adapter molecule recruited during the signaling cascade of the TIR...
February 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28205459/effects-of-an-antagonistic-analog-of-growth-hormone-releasing-hormone-on-endometriosis-in-a-mouse-model-and-in-vitro
#18
Frank Köster, Li Jin, Yuanming Shen, Andrew V Schally, Ren-Zhi Cai, Norman L Block, Daniela Hornung, Gabriele Marschner, Achim Rody, Jörg B Engel, Dominique Finas
Endometriosis is a benign gynecologic disorder causing dysmenorrhea, pelvic pain, and subfertility. Receptors for the growth hormone-releasing hormone (GHRH) were found in endometriotic tissues. Antagonists of GHRH have been used to inhibit the growth of endometriotic endometrial stromal cells. In this study, the GHRH receptor splice variant (SV) 1 was detected in human endometrial tissue samples by Western blots and quantitative reverse transcription polymerase chain reaction (qRT-PCR). The highest messenger RNA (mRNA) and protein levels of SV1 were found in eutopic endometrium from patients with endometriosis compared to ectopic endometriotic tissues and endometrium from normal patients...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28204553/the-rna-polymerase-associated-factor-1-complex-is-required-for-plant-touch-responses
#19
Gregory S Jensen, Kateryna Fal, Olivier Hamant, Elizabeth S Haswell
No abstract text is available yet for this article.
January 1, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28203566/increased-spontaneous-recombination-in-rnase-h2-deficient-cells-arises-from-multiple-contiguous-rnmps-and-not-from-single-rnmp-residues-incorporated-by-dna-polymerase-epsilon
#20
Anastasiya Epshtein, Catherine J Potenski, Hannah L Klein
Ribonucleotides can become embedded in DNA from insertion by DNA polymerases, failure to remove Okazaki fragment primers, R-loops that can prime replication, and RNA/cDNA-mediated recombination. RNA:DNA hybrids are removed by RNase H enzymes. Single rNMPs in DNA are removed by RNase H2 and if they remain on the leading strand, can lead to mutagenesis in a Top1-dependent pathway. rNMPs in DNA can also stimulate genome instability, among which are homologous recombination gene conversion events. We previously found that, similar to the rNMP-stimulated mutagenesis, rNMP-stimulated recombination was also Top1-dependent...
June 2016: Microbial Cell
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