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https://www.readbyqxmd.com/read/28550760/exercise-training-ameliorates-matrix-metalloproteinases-2-and-9-messenger-rna-expression-and-mitigates-adverse-left-ventricular-remodeling-in-streptozotocin-induced-diabetic-rats
#1
Flávio S Silva, Raul H Bortolin, Diego N Araújo, Dáfiny E S Marques, João Paulo M S Lima, Adriana A Rezende, Wouber H B Vieira, Naisandra B Silva, Karina C P Medeiros, Paul W Ackermann, Bento J Abreu, Fernando A L Dias
BACKGROUND: The aim was to investigate whether exercise training (ExT) would ameliorate expression of key genes for myocardial morphostructure and mitigate adverse left ventricular (LV) remodeling in experimental type 1 diabetes (T1D). METHODS AND RESULTS: Male Wistar rats were divided into four groups: sedentary control (SC, n=9), trained control (TC, n=13), sedentary diabetic (SD, n=20), and trained diabetic (TD, n=17). T1D was induced by 40 mg/kg streptozotocin (single dose, i...
May 18, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28549208/identification-of-reference-genes-for-rt-qpcr-analysis-in-peach-genotypes-with-contrasting-chilling-requirements
#2
N Marini, C B Bevilacqua, M V Büttow, M C B Raseira, S Bonow
Selecting and validating reference genes are the first steps in studying gene expression by reverse transcriptase-quantitative polymerase chain reaction (RT-qPCR). The present study aimed to evaluate the stability of five reference genes for the purpose of normalization when studying gene expression in various cultivars of Prunus persica with different chilling requirements. Flower bud tissues of nine peach genotypes from Embrapa's peach breeding program with different chilling requirements were used, and five candidate reference genes based on the RT-qPCR that were useful for studying the relative quantitative gene expression and stability were evaluated using geNorm, NormFinder, and bestKeeper software packages...
May 25, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28548882/finding-conducting-and-nurturing-science-a-virologist-s-memoir
#3
Anna Marie Ann Skalka Skalka
My laboratory investigations have been driven by an abiding interest in understanding the consequences of genetic rearrangement in evolution and disease, and in using viruses to elucidate fundamental mechanisms in biology. Starting with bacteriophages and moving to the retroviruses, my use of the tools of genetics, molecular biology, biochemistry, and biophysics has spanned more than half a century-from the time when DNA structure was just discovered to the present day of big data and epigenetics. Both riding and contributing to the successive waves of technology, my laboratory has elucidated fundamental mechanisms in DNA replication, repair, and recombination...
May 26, 2017: Annual Review of Virology
https://www.readbyqxmd.com/read/28546523/alk-protein-expression-is-related-to-neuroblastoma-aggressiveness-but-is-not-independent-prognostic-factor
#4
Ji Won Lee, Sung Hye Park, Hyoung Jin Kang, Kyung Duk Park, Hee Young Shin, Hyo Seop Ahn
Purpose: In this study, anaplastic lymphoma kinase (ALK) mutation and amplification, ALK protein expression, loss of the nuclear alpha thalassemia/mental retardation syndrome X-linked (ATRX) protein, and telomerase reverse transcriptase (TERT) protein expression were studied to investigate potential correlations between these molecular characteristics and clinical features or outcomes in neuroblastoma. Materials and Methods: Seventy-two patients were enrolled in this study...
May 22, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28544907/micrornas-that-affect-the-fanconi-anemia-brca-pathway-are-downregulated-in-imatinib-resistant-chronic-myeloid-leukemia-patients-without-detectable-bcr-abl-kinase-domain-mutations
#5
E Yap, Z A Norziha, A Simbun, N R Tumian, S K Cheong, C F Leong, C L Wong
Chronic myeloid leukemia (CML) patients who do not achieve landmark responses following treatment with imatinib mesylate (IM) are considered IM-resistant. Although IM-resistance can be due to BCR-ABL kinase domain (KD) mutations, many IM-resistant patients do not have detectable BCR-ABL KD mutations. MicroRNAs (miRNAs) are short non-coding RNAs that control gene expression. To investigate the role of miRNAs in IM-resistance, we recruited 8 chronic phase CML patients with IM-resistance who tested negative for BCR-ABL KD mutations and 2 healthy normal controls...
May 18, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28544318/neurologic-clinical-signs-in-cattle-with-astrovirus-associated-encephalitis
#6
R Deiss, S Selimovic-Hamza, T Seuberlich, M Meylan
BACKGROUND: Evidence of neurotropic astroviruses has been established using novel genetic methods in cattle suffering from viral encephalitis of previously unknown origin. OBJECTIVES: To describe the clinical signs observed in cattle with astrovirus-associated encephalitis. ANIMALS: Eight cattle (4 cows, 3 heifers, and 1 bull of 4 different breeds) admitted to the Clinic for Ruminants for neurologic disease and 1 cow investigated in the field...
May 22, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28542550/a-spatio-temporal-assessment-of-simian-human-immunodeficiency-virus-shiv-evolution-reveals-a-highly-dynamic-process-within-the-host
#7
Alison F Feder, Christopher Kline, Patricia Polacino, Mackenzie Cottrell, Angela D M Kashuba, Brandon F Keele, Shiu-Lok Hu, Dmitri A Petrov, Pleuni S Pennings, Zandrea Ambrose
The process by which drug-resistant HIV-1 arises and spreads spatially within an infected individual is poorly understood. Studies have found variable results relating how HIV-1 in the blood differs from virus sampled in tissues, offering conflicting findings about whether HIV-1 throughout the body is homogeneously distributed. However, most of these studies sample only two compartments and few have data from multiple time points. To directly measure how drug resistance spreads within a host and to assess how spatial structure impacts its emergence, we examined serial sequences from four macaques infected with RT-SHIVmne027, a simian immunodeficiency virus encoding HIV-1 reverse transcriptase (RT), and treated with RT inhibitors...
May 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28541146/assessment-of-the-immunogenicity-of-rabies-vaccine-preserved-by-vaporization-and-delivered-to-the-duodenal-mucosa-of-gray-foxes-urocyon-cinereoargenteus
#8
Todd G Smith, Xianfu Wu, James A Ellison, Ashutosh Wadhwa, Richard Franka, Gregory L Langham, Brianna L Skinner, Cathleen A Hanlon, Victor L Bronshtein
OBJECTIVE To assess the immunogenicity of thermostable live-attenuated rabies virus (RABV) preserved by vaporization (PBV) and delivered to the duodenal mucosa of a wildlife species targeted for an oral vaccination program. ANIMALS 8 gray foxes (Urocyon cinereoargenteus). PROCEDURES Endoscopy was used to place RABV PBV (n = 3 foxes), alginate-encapsulated RABV PBV (3 foxes), or nonpreserved RABV (2 foxes) vaccine into the duodenum of foxes. Blood samples were collected weekly to monitor the immune response...
June 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28540745/uvaria-angolensis-as-a-promising-source-of-inhibitors-of-hiv-1-rt-associated-rna-dependent-dna-polymerase-and-rnase-h-functions
#9
Alvine Ngoutane Mfopa, Angela Corona, Kodjo Eloh, Enzo Tramontano, Aldo Frau, Fabrice Fekam Boyom, Pierluigi Caboni, Graziella Tocco
Reverse transcriptase (RT)-associated DNA polymerase (RDDP) and ribonucleaser H (RNase H) functions are both essential for HIV-1 genome replication, and the identification of new inhibitors to block both of them is a goal actively pursued by the scientific community. In this field, natural extracts have shown a great potential as source of new antivirals. In the present work, we investigated the effect of Uvaria angolensis extracts on the HIV-1 reverse transcriptase-associated DNA polymerase and ribonuclease H activities...
May 25, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28539254/prevalence-of-primary-resistance-among-acutely-recently-hiv-infected-patients-in-rio-de-janeiro-brazil
#10
Ana Cristina G Ferreira, Lara E Coelho, Eduarda Grinsztejn, Carlos S de Jesus, Monick L Guimarães, Valdilea G Veloso, Beatriz Grinsztejn, Sandra W Cardoso
INTRODUCTION: The widespread use of antiretroviral therapy (ART) increased the transmission of antiretroviral resistant HIV strains. ART initiation during acute/recent HIV infection limits HIV reservoirs and improves immune response in HIV infected individuals. Transmitted drug resistance (TDR) may jeopardize the early goals of early ART among acute/recent HIV infected patients. METHODS: Patients with acute/recent HIV infection who underwent resistance test before ART initiation were included in this analysis...
May 21, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28535764/in-smokers-sonic-hedgehog-modulates-pulmonary-endothelial-function-through-vascular-endothelial-growth-factor
#11
Priscilla Henno, Stanislas Grassin-Delyle, Emeline Belle, Marion Brollo, Emmanuel Naline, Edouard Sage, Philippe Devillier, Dominique Israël-Biet
BACKGROUND: Tobacco-induced pulmonary vascular disease is partly driven by endothelial dysfunction. The Sonic hedgehog (SHH) pathway is involved in vascular physiology. We sought to establish whether the SHH pathway has a role in pulmonary endothelial dysfunction in smokers. METHODS: The ex vivo endothelium-dependent relaxation of pulmonary artery rings in response to acetylcholine (Ach) was compared in 34 current or ex-smokers and 8 never-smokers. The results were expressed as a percentage of the contraction with phenylephrine...
May 23, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28535583/molecular-testing-of-brain-tumor
#12
REVIEW
Sung-Hye Park, Jaekyung Won, Seong-Ik Kim, Yujin Lee, Chul-Kee Park, Seung-Ki Kim, Seung-Hong Choi
The World Health Organization (WHO) classification of central nervous system (CNS) tumors was revised in 2016 with a basis on the integrated diagnosis of molecular genetics. We herein provide the guidelines for using molecular genetic tests in routine pathological practice for an accurate diagnosis and appropriate management. While astrocytomas and IDH-mutant (secondary) glioblastomas are characterized by the mutational status of IDH, TP53 , and ATRX , oligodendrogliomas have a 1p/19q codeletion and mutations in IDH, CIC , FUBP1 , and the promoter region of telomerase reverse transcriptase ( TERTp )...
May 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28535013/htert-c250t-promoter-mutation-and-telomere-length-as-a-molecular-markers-of-cancer-progression-in-patients-with-head-and-neck-cancer
#13
Wojciech Barczak, Wiktoria M Suchorska, Agnieszka Sobecka, Karolina Bednarowicz, Piotr Machczynski, Pawel Golusinski, Blazej Rubis, Michal M Masternak, Wojciech Golusinski
Squamous cell carcinoma of the head and neck (HNSCC) is the sixth leading cause of cancer worldwide, representing over half a million incidents every year. Cancer cells, including HNSCC, are characterized by increased telomerase activity. This enzymatic complex is active in ~90% of all cancer types and is responsible for the lengthening of telomeres. Highly recurrent point mutations in the human telomerase reverse transcriptase (hTERT) promoter have recently been reported in a number of human neoplasms. The aim of the present study was to analyze the prevalence of the hTERT promoter C250T mutation and telomere length in the blood leukocytes of 61 patients with HNSCC and 49 healthy individuals...
May 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28533985/metabarcoding-monitoring-analysis-the-pros-and-cons-of-using-co-extracted-environmental-dna-and-rna-data-to-assess-offshore-oil-production-impacts-on-benthic-communities
#14
Olivier Laroche, Susanna A Wood, Louis A Tremblay, Gavin Lear, Joanne I Ellis, Xavier Pochon
Sequencing environmental DNA (eDNA) is increasingly being used as an alternative to traditional morphological-based identification to characterize biological assemblages and monitor anthropogenic impacts in marine environments. Most studies only assess eDNA which, compared to eRNA, can persist longer in the environment after cell death. Therefore, eRNA may provide a more immediate census of the environment due to its relatively weaker stability, leading some researchers to advocate for the use of eRNA as an additional, or perhaps superior proxy for portraying ecological changes...
2017: PeerJ
https://www.readbyqxmd.com/read/28530472/telomerase-expression-in-medaka-oryzias-melastigma-pharyngeal-teeth
#15
W H Tan, P E Witten, C Winkler, D W T Au, A Huysseune
Nonmammalian vertebrates have the capacity of lifelong tooth replacement. In all vertebrates, tooth formation requires contact and interaction between the oral or pharyngeal epithelium and the underlying mesenchyme. To secure lifelong replacement, the presence of odontogenic stem cells has been postulated, particularly in the epithelial compartment. This study uses an advanced teleost fish species, the marine medaka Oryzias melastigma, a close relative to Oryzias latipes, to examine the expression and distribution of telomerase reverse transcriptase (Tert), the catalytic unit of telomerase, in developing pharyngeal teeth and to relate these data to the proliferative activity of the cells...
June 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28529718/recent-advances-in-understanding-hiv-evolution
#16
REVIEW
Sophie M Andrews, Sarah Rowland-Jones
The human immunodeficiency virus (HIV) evolves rapidly owing to the combined activity of error-prone reverse transcriptase, recombination, and short generation times, leading to extensive viral diversity both within and between hosts. This diversity is a major contributing factor in the failure of the immune system to eradicate the virus and has important implications for the development of suitable drugs and vaccines to combat infection. This review will discuss the recent technological advances that have shed light on HIV evolution and will summarise emerging concepts in this field...
2017: F1000Research
https://www.readbyqxmd.com/read/28528306/the-group-ii-intron-maturase-a-reverse-transcriptase-and-splicing-factor-go-hand-in-hand
#17
REVIEW
Chen Zhao, Anna Marie Pyle
The splicing of group II introns in vivo requires the assistance of a multifunctional intron encoded protein (IEP, or maturase). Each IEP is also a reverse-transcriptase enzyme that enables group II introns to behave as mobile genetic elements. During splicing or retro-transposition, each group II intron forms a tight, specific complex with its own encoded IEP, resulting in a highly reactive holoenzyme. This review focuses on the structural basis for IEP function, as revealed by recent crystal structures of an IEP reverse transcriptase domain and cryo-EM structures of an IEP-intron complex...
May 18, 2017: Current Opinion in Structural Biology
https://www.readbyqxmd.com/read/28528141/portland-cement-induces-human-periodontal-ligament-cells-to-differentiate-by-upregulating-mir-146a
#18
Min-Ching Wang, Li-Yin Yeh, Wen-Yu Shih, Wan-Chun Li, Kuo-Wei Chang, Shu-Chun Lin
BACKGROUND/PURPOSE: Bioaggregates such as Portland cement (PC) can be an economical alternative for mineral trioxide aggregate (MTA) with additional benefit of less discoloration. MTA has been known to induce differentiations of several dental cells. MicroRNAs are important regulators of biological processes, including differentiation, physiologic homeostasis, and disease progression. This study is to explore how PC enhances the differentiation of periodontal ligament (PDL) cells in microRNAs level...
May 18, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28527659/curcumin-administration-suppress-acetylcholinesterase-gene-expression-in-cadmium-treated-rats
#19
Ayodele Jacob Akinyemi, Ganiyu Oboh, Adewale Oluwaseun Fadaka, Babawale Peter Olatunji, Seun Akomolafe
Curcumin, the main polyphenolic component of turmeric (Curcuma longa) rhizomes have been reported to exert anticholinesterase potential with limited information on how they regulate acetylcholinesterase (AChE) gene expression. Hence, this study sought to evaluate the effect of curcumin on cerebral cortex acetylcholinesterase (AChE) activity and their mRNA gene expression level in cadmium (Cd)-treated rats. Furthermore, in vitro effect of different concentrations of curcumin (1-5μg/mL) on rat cerebral cortex AChE activity was assessed...
May 17, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28525279/double-winged-3-hydroxypyrimidine-2-4-diones-potent-and-selective-inhibition-against-hiv-1-rnase-h-with-significant-antiviral-activity
#20
Sanjeev Kumar V Vernekar, Jing Tang, Bulan Wu, Andrew D Huber, Mary C Casey, Nataliya S Myshakina, Daniel J Wilson, Jayakanth Kankanala, Karen A Kirby, Michael A Parniak, Stefan G Sarafianos, Zhengqiang Wang
Human immunodeficiency virus (HIV) reverse transcriptase (RT)-associated ribonuclease H (RNase H) remains the only virally encoded enzymatic function yet to be exploited as an antiviral target. One of the possible challenges may be that targeting HIV RNase H is confronted with a steep substrate barrier. We have previously reported a 3-hydroxypyrimidine-2,4-dione (HPD) subtype that potently and selectively inhibited RNase H without inhibiting HIV in cell culture. We report herein a critical redesign of the HPD chemotype featuring an additional wing at the C5 position that led to drastically improved RNase H inhibition and significant antiviral activity...
May 19, 2017: Journal of Medicinal Chemistry
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