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https://www.readbyqxmd.com/read/28653184/reversal-of-the-platelet-inhibitory-effect-of-the-p2y12-inhibitors-clopidogrel-prasugrel-and-ticagrelor-in-vitro-a-new-approach-to-an-old-issue
#1
Lisa Schoener, Stefanie Jellinghaus, Bernhardt Richter, Christian Pfluecke, Georg Ende, Marian Christoph, Silvio Quick, Tobias Loehn, Uwe Speiser, David M Poitz, Johannes Mierke, Ruth H Strasser, Karim Ibrahim
AIM: Platelet transfusion is an effective option to reverse platelet inhibition in thienopyridine-treated patients suffering from bleedings or requiring urgent surgery. However, in ticagrelor-treated patients, the previous studies revealed significant clinical effects to platelet rich plasma (PRP) but poor response to pooled platelets (PP) as used in clinical routine. The aim of this study was to elucidate a potential pathomechanism to explain the poor response of ticagrelor to PP. METHODS AND RESULTS: From 79 whole blood samples of patients treated with ticagrelor, prasugrel, or clopidogrel, the PRI-VASP was determined before and after in vitro platelet supplementation of PP or PRP at increasing concentrations...
June 26, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/28627041/prior-exercise-speeds-pulmonary-oxygen-uptake-kinetics-and-increases-critical-power-during-supine-but-not-upright-cycling
#2
Richie P Goulding, Denise M Roche, Simon Marwood
Critical power (CP) is a fundamental parameter defining high-intensity exercise tolerance and is related to the time constant of phase II pulmonary oxygen uptake kinetics (τV̇O2 ). To test the hypothesis that this relationship is causal we determined the impact of prior exercise ("priming") on CP and τV̇O2 in the upright and supine positions. 17 healthy men were assigned to either upright or supine exercise groups, whereby CP, τV̇O2 and muscle deoxyhaemoglobin kinetics (τ[HHb] ) were determined via constant-power tests to exhaustion at four work-rates with (primed) and without (control) priming exercise at ∼31%Δ...
June 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28624225/inhibition-of-mef2a-enhances-neovascularization-via-post-transcriptional-regulation-of-14q32-micrornas-mir-329-and-mir-494
#3
Sabine M J Welten, Margreet R de Vries, Erna A B Peters, Sudhir Agrawal, Paul H A Quax, A Yaël Nossent
Improving the efficacy of neovascularization is a promising strategy to restore perfusion of ischemic tissues in patients with peripheral arterial disease. The 14q32 microRNA cluster is highly involved in neovascularization. The Mef2a transcription factor has been shown to induce transcription of the microRNAs within this cluster. We inhibited expression of Mef2a using gene-silencing oligonucleotides (GSOs) in an in vivo hind limb ischemia model. Treatment with GSO-Mef2a clearly improved blood flow recovery within 3 days (44% recovery versus 25% recovery in control) and persisted until 14 days after ischemia induction (80% recovery versus 60% recovery in control)...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28624194/sustained-inhibition-of-hbv-replication-in%C3%A2-vivo-after-systemic-injection-of-aavs-encoding-artificial-antiviral-primary-micrornas
#4
Mohube Betty Maepa, Abdullah Ely, Wayne Grayson, Patrick Arbuthnot
Chronic infection with hepatitis B virus (HBV) remains a problem of global significance and improving available treatment is important to prevent life-threatening complications arising in persistently infected individuals. HBV is susceptible to silencing by exogenous artificial intermediates of the RNA interference (RNAi) pathway. However, toxicity of Pol III cassettes and short duration of silencing by effectors of the RNAi pathway may limit anti-HBV therapeutic utility. To advance RNAi-based HBV gene silencing, mono- and trimeric artificial primary microRNAs (pri-miRs) derived from pri-miR-31 were placed under control of the liver-specific modified murine transthyretin promoter...
June 16, 2017: Molecular Therapy. Nucleic Acids
https://www.readbyqxmd.com/read/28621390/kemijski-laboratorij-celjske-kraljice-ob-580-letnici-kronanja-%C3%A4-e%C3%A5-ke-kraljice-barbare-celjske-chemical-laboratory-of-celje-queen-at-580th-anniversary-of-bohemian-coronation-of-queen-barbara-of-celje
#5
Stanislav Južnič
Barbara Celjska je bila gotovo najbogatejša alkimistka vseh časov. Prispevek skuša pojasniti kakšni poskusi so potekali v njenem laboratoriju in nakazati, katere tehniške kemijske naprave je utegnila pri tem uporabljati. Ker je bila večina leteh iz zlahka lomljivih snovi, bi bilo njihovo iskanje brškone brez haska, saj ni veliko upanja za njihovo ohranitev. Barbara of Cilli was certainly the richest female alchemist of all times. The article tries to explain what kind of experiments she carried out in her laboratory and indicate which technical chemical plant she likely has used...
June 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/28617488/potential-use-of-the-pri-and-active-fluorescence-for-the-diagnosis-of-the-physiological-state-of-plants-under-ozone-exposure-and-high-atmospheric-vapor-pressure-deficit
#6
Elodie Merlier, Gabriel Hmimina, Matthieu Bagard, Eric Dufrêne, Kamel Soudani
Assessing photosynthesis rates with remote sensing is important for tracking the physiological state of plants. The photochemical reflectance index (PRI) is a good estimator of short-term light-use efficiency (LUE) at the leaf scale but its responses to environmental factors are poorly understood. In this study, we assessed changes in the responses of the PRI to ozone exposure and to an increase in atmospheric drought (separately and combined) in oak (Quercus robur) and holm oak (Quercus ilex) that were planted in climatic cells under controlled conditions...
June 15, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28613202/-comparison-of-two-on-line-risk-calculators-versus-the-detection-of-circulating-prostate-cells-for-the-detection-of-high-risk-prostate-cancer-at-first-biopsy
#7
Nigel P Murray, Cynthia Fuentealba, Eduardo Reyes, Omar Jacob
OBJECTIVE: The limitations of total serum PSA values remains problematic; nomograms may improve the prediction of a positive prostate biopsy (PB). We compare in a prospective study of Chilean men with suspicion of prostate cancer due to an elevated total serum PSA and/or abnormal digital rectal examination, the use of two on-line nomograms with the detection of primary malignant circulating prostate cells (CPCs) to predict a positive PB for high risk prostate cancer. METHODS: Consecutive men with suspicion of prostate cancer underwent 12 core TRUS prostate biopsy...
June 2017: Archivos Españoles de Urología
https://www.readbyqxmd.com/read/28600480/mir-193a-3p-is-a-key-tumor-suppressor-in-ulcerative-colitis-associated-colon-cancer-and-promotes-carcinogenesis-through-up-regulation-of-il17rd
#8
Joel Pekow, Katherine Meckel, Urszula Dougherty, Yong Huang, Xindi Chen, Anas Almoghrabi, Reba Mustafi, Fatma Ayaloglu-Butun, Zifeng Deng, Haider I Haider, John Hart, David T Rubin, John H Kwon, Marc Bissonnette
Purpose: Patients with ulcerative colitis (UC) are at increased risk for colorectal cancer, although mechanisms underlying neoplastic transformation are poorly understood. We sought to evaluate the role of microRNAs in neoplasia development in this high-risk population.   <p>Experimental Design: Tissue from 12 controls, 9 UC patients without neoplasia, and 11 UC patients with neoplasia was analyzed. miRNA array analysis was performed and select miRNAs assayed by real-time PCR on the discovery cohort and a validation cohort...
June 9, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28594311/a-lentiviral-vector-bearing-a-reverse-intron-demonstrates-superior-expression-of-both-proteins-and-micrornas
#9
Brigid Chiyoko Poling, Kevin Tsai, Dong Kang, Linda Ren, Edward M Kennedy, Bryan R Cullen
While lentiviral expression vectors are widely used in many facets of molecular biology, due to their ability to stably express heterologous genes in both dividing and non-dividing cells, they suffer from the disadvantage that introns inserted into the vector genome are generally rapidly lost by splicing in packaging cell lines. The presence of an intron, if achievable, has the potential to facilitate the expression of transgene cDNAs, as splicing has been extensively shown to facilitate mRNA biogenesis and function...
June 8, 2017: RNA Biology
https://www.readbyqxmd.com/read/28589081/inhibitory-effect-of-1-8-cineol-on-%C3%AE-catenin-regulation-wnt11-expression-and-cellular-progression-in-hnscc
#10
Anna Roettger, Karl-Ludwig Bruchhage, Maren Drenckhan, Kirsten Ploetze-Martin, Ralph Pries, Barbara Wollenberg
OBJECTIVES: Head and neck squamous cell carcinoma (HNSCC) is one of the most common tumors worldwide. The high mortality rates have not changed during the last three decades, and thus there is an enormous need for innovative therapy approaches. Several recent studies suggest an important role of the Wnt/β-catenin signaling pathway in the tumorigenesis of HNSCC. We analyzed the effect of the monoterpene oxide 1,8-cineol on the regulation of the Wnt/β-catenin signaling pathway and the cellular progression of different HNSCC cell lines...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28584122/an-exportin-1-dependent-microrna-biogenesis-pathway-during-human-cell-quiescence
#11
Ivan Martinez, Karen E Hayes, Jamie A Barr, Abby D Harold, Mingyi Xie, Syed I A Bukhari, Shobha Vasudevan, Joan A Steitz, Daniel DiMaio
The reversible state of proliferative arrest known as "cellular quiescence" plays an important role in tissue homeostasis and stem cell biology. By analyzing the expression of miRNAs and miRNA-processing factors during quiescence in primary human fibroblasts, we identified a group of miRNAs that are induced during quiescence despite markedly reduced expression of Exportin-5, a protein required for canonical miRNA biogenesis. The biogenesis of these quiescence-induced miRNAs is independent of Exportin-5 and depends instead on Exportin-1...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28578740/application-of-network-methods-for-understanding-mental-disorders-pitfalls-and-promise
#12
S Guloksuz, L-K Pries, J van Os
Galvanized with the availability of sophisticated statistical techniques and large datasets, network medicine has emerged as an active area of investigation. Following this trend, network methods have been utilized to understand the interplay between symptoms of mental disorders. This realistic approach that may provide an improved framework into understanding mental conditions and underlying mechanisms is certainly to be welcomed. However, we have noticed that symptom network studies tend to lose sight of the fundamentals, overlook major limitations embedded in study designs, and make inferences that are difficult to justify with current findings...
June 5, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28567705/diagnostic-value-of-doppler-echocardiography-for-identifying-hemodynamic-significant-pulmonary-valve-regurgitation-in-tetralogy-of-fallot-comparison-with-cardiac-mri
#13
Niek E G Beurskens, Thomas M Gorter, Petronella G Pieper, Elke S Hoendermis, Beatrijs Bartelds, Tjark Ebels, Rolf M F Berger, Tineke P Willems, Joost P van Melle
Quantification of pulmonary regurgitation (PR) is essential in the management of patients with repaired tetralogy of Fallot (TOF). We sought to evaluate the accuracy of first-line Doppler echocardiography in comparison with cardiac magnetic resonance imaging (MRI) to identify hemodynamic significant PR. Paired cardiac MRI and echocardiographic studies (n = 97) in patients with repaired TOF were retrospectively analyzed. Pressure half time (PHT) and pulmonary regurgitation index (PRi) were measured using continuous wave Doppler...
May 31, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28548675/inducible-bcl-2-gene-rna-interference-mediated-by-aptamer-integrated-hdv-ribozyme-switch
#14
Yuanyuan Zhang, Jine Wang, Hui Cheng, Na Sun, Min Liu, Zhengyan Wu, Renjun Pei
The regulation of RNA interference (RNAi) could be a powerful method for the study of temporal and dose dependent effects of gene expression. In this study, we designed the hepatitis delta virus (HDV) ribozyme with an embedded theophylline aptamer as the sensor domain and the pri-miRNA of endogenous gene Bcl-2 as the effector domain to engineer an RNAi-regulatory device in MCF-7 cells. The system allowed us to control gene expression by adding theophylline into the culture media in a dose dependent fashion...
May 26, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28542522/a-mutation-in-porcine-pre-mir-15b-alters-the-biogenesis-of-mir-15b-16-1-cluster-and-strand-selection-of-mir-15b
#15
Wenyang Sun, Jing Lan, Lei Chen, Jinjie Qiu, Zonggang Luo, Mingzhou Li, Jinyong Wang, Jiugang Zhao, Tinghuan Zhang, Xi Long, Jie Chai, Zunqiang Yan, Zongyi Guo, Shuangbao Gun
MicroRNAs (miRNAs) are small non-coding RNAs that are involved in translational regulation of the messenger RNA molecules. Sequence variations in the genes encoding miRNAs could influence their biogenesis and function. MiR-15b plays an important role in cellular proliferation, apoptosis and the cell cycle. Here, we report the identification of a C58T mutation in porcine pre-miR-15b. Through in vitro and in vivo experiments, we determined that this mutation blocks the transition from pri-miRNA to pre-miRNA, alters the strand selection between miR-15b-5p and miR-15b-3p, and obstructs biogenesis of the downstream miR-16-1...
2017: PloS One
https://www.readbyqxmd.com/read/28540403/analysis-of-primary-mirna-3662-and-its-mature-form-may-improve-detection-of-the-lung-adenocarcinoma
#16
Tomasz Powrózek, Radosław Mlak, Marcin Dziedzic, Teresa Małecka-Massalska, Dariusz Sagan
INTRODUCTION: Because of the alarming data concerning lung cancer morbidity and mortality, investigation of new molecular markers allowing early cancer detection is desirable. In the present study, we investigated the potential role of miRNA-3662 precursor (pri-miRNA-3662) as potential novel diagnostic marker of lung adenocarcinoma (AC). MATERIALS AND METHODS: Expression of miRNA-3662 and pri-miRNA-3662 was analyzed in 56 fresh-frozen tissues of non-small cell lung cancer and corresponding adjacent non-cancerous tissues using (NCT) qRT-PCR...
May 24, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28523549/dna-methylation-in-schizophrenia
#17
Lotta-Katrin Pries, Sinan Gülöksüz, Gunter Kenis
Schizophrenia is a highly heritable psychiatric condition that displays a complex phenotype. A multitude of genetic susceptibility loci have now been identified, but these fail to explain the high heritability estimates of schizophrenia. In addition, epidemiologically relevant environmental risk factors for schizophrenia may lead to permanent changes in brain function. In conjunction with genetic liability, these environmental risk factors-likely through epigenetic mechanisms-may give rise to schizophrenia, a clinical syndrome characterized by florid psychotic symptoms and moderate to severe cognitive impairment...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28515295/natural-variation-of-epstein-barr-virus-genes-proteins-and-pri-mirna-revised
#18
Samantha Correia, Anne Palser, Claudio Elgueta Karstegl, Jaap M Middeldorp, Octavia Ramayanti, Jeffrey I Cohen, Allan Hildesheim, Maria Dolores Fellner, Joelle Wiels, Robert E White, Paul Kellam, Paul J Farrell
Viral gene sequences from an enlarged set of about 200 Epstein-Barr virus (EBV) strains including many primary isolates have been used to investigate variation in key viral genetic regions, particularly LMP1, Zp, gp350, EBNA1 and the BART miRNA cluster 2. Determination of type 1 and type 2 EBV in saliva samples from people from a wide range of geographic and ethnic backgrounds demonstrates a small percentage of healthy white Caucasian British people carrying predominantly type 2 EBV. Linkage of Zp and gp350 variants to type 2 EBV is likely to be due to their genes being adjacent to the EBNA3 locus, which is one of the major determinants of the type 1/type 2 distinction...
May 17, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28498072/paravertebral-foramen-screw-fixation-for-posterior-cervical-spine-fusion-biomechanical-study-and-description-of-a-novel-technique
#19
Satoshi Maki, Masaaki Aramomi, Yusuke Matsuura, Takeo Furuya, Mitsutoshi Ota, Yasushi Iijima, Junya Saito, Takane Suzuki, Chikato Mannoji, Kazuhisa Takahashi, Masashi Yamazaki, Masao Koda
OBJECTIVE Fusion surgery with instrumentation is a widely accepted treatment for cervical spine pathologies. The authors propose a novel technique for subaxial cervical fusion surgery using paravertebral foramen screws (PVFS). The authors consider that PVFS have equal or greater biomechanical strength than lateral mass screws (LMS). The authors' goals of this study were to conduct a biomechanical study of PVFS, to investigate the suitability of PVFS as salvage fixation for failed LMS, and to describe this novel technique...
May 12, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28496318/pri-microrna-124-rs531564-polymorphism-minor-allele-increases-the-risk-of-pulmonary-artery-hypertension-by-abnormally-enhancing-proliferation-of-pulmonary-artery-smooth-muscle-cells
#20
Quanzhong Li, Zongjie Qian, Linqing Wang
MicroRNA-124 (miR-124) has been reported to be downregulated in the cells exposed to hypoxia, which was confirmed in our study. We then used online microRNA target prediction tools to identify GRB2, SMAD5, and JAG1 as the candidate target genes of miR-124, and we next validated GRB2 as a direct gene by using luciferase reporter system. We also established the regulatory relationship between miR-124 and GRB2 by showing the negative linear relationship between GRB2 and miR-124 expression. Furthermore, we investigated the miR-124 and GRB2 expression levels of different genotypes including CC (n=30), GC (n=18), and GG (n=4), which supported the hypothesis that the presence of minor allele (C) of rs531564 polymorphism compromised the expression of miR-124...
2017: International Journal of Chronic Obstructive Pulmonary Disease
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