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https://www.readbyqxmd.com/read/28511858/reduced-myocardial-reserve-in-young-x-linked-muscular-dystrophy-mice-diagnosed-by-two-dimensional-strain-analysis-combined-with%C3%A2-stress-echocardiography
#1
Zhenzhou Li, Ying Li, Li Zhang, Xiaoying Zhang, Rebecca Sullivan, Xiaojie Ai, Christopher Szeto, Angela Cai, Longjian Liu, Weidong Xiao, Quanshui Li, Shuping Ge, Xiongwen Chen
BACKGROUND: Early, sensitive, and reproducible evaluation of left ventricular function is imperative for the diagnosis of cardiac dysfunction in patients with Duchene muscular dystrophy. The aim of this study was to test the hypothesis that combining two-dimensional strain analysis with catecholamine stress could be a sensitive method for detecting early cardiac dysfunction. METHODS: Mdx (C57BL/10ScSn-Dmdmdx/J, a mouse model of DMD) and control (C57BL/10ScSn) mice were studied with conventional M-mode and high-frequency ultrasound-based two-dimensional speckle-tracking echocardiography using long- and short-axis images of the left ventricle at baseline and after intraperitoneal isoprenaline (ISO) administration (2 μg/g body weight)...
May 13, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28474951/_-36-96-kr_-60-low-z-boundary-of-the-island-of-deformation-at-n-60
#2
J Dudouet, A Lemasson, G Duchêne, M Rejmund, E Clément, C Michelagnoli, F Didierjean, A Korichi, G Maquart, O Stezowski, C Lizarazo, R M Pérez-Vidal, C Andreoiu, G de Angelis, A Astier, C Delafosse, I Deloncle, Z Dombradi, G de France, A Gadea, A Gottardo, B Jacquot, P Jones, T Konstantinopoulos, I Kuti, F Le Blanc, S M Lenzi, G Li, R Lozeva, B Million, D R Napoli, A Navin, C M Petrache, N Pietralla, D Ralet, M Ramdhane, N Redon, C Schmitt, D Sohler, D Verney, D Barrientos, B Birkenbach, I Burrows, L Charles, J Collado, D M Cullen, P Désesquelles, C Domingo Pardo, V González, L Harkness-Brennan, H Hess, D S Judson, M Karolak, W Korten, M Labiche, J Ljungvall, R Menegazzo, D Mengoni, A Pullia, F Recchia, P Reiter, M D Salsac, E Sanchis, Ch Theisen, J J Valiente-Dobón, M Zielińska
Prompt γ-ray spectroscopy of the neutron-rich ^{96}Kr, produced in transfer- and fusion-induced fission reactions, has been performed using the combination of the Advanced Gamma Tracking Array and the VAMOS++ spectrometer. A second excited state, assigned to J^{π}=4^{+}, is observed for the first time, and a previously reported level energy of the first 2^{+} excited state is confirmed. The measured energy ratio R_{4/2}=E(4^{+})/E(2^{+})=2.12(1) indicates that this nucleus does not show a well-developed collectivity contrary to that seen in heavier N=60 isotones...
April 21, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28466869/corrigendum-regulation-of-monocyte-cell-fate-by-blood-vessels-mediated-by-notch-signalling
#3
Jaba Gamrekelashvili, Roberto Giagnorio, Jasmin Jussofie, Oliver Soehnlein, Johan Duchene, Carlos G Briseño, Saravana K Ramasamy, Kashyap Krishnasamy, Anne Limbourg, Christine Häger, Tamar Kapanadze, Chieko Ishifune, Rabea Hinkel, Freddy Radtke, Lothar J Strobl, Ursula Zimber-Strobl, L Christian Napp, Johann Bauersachs, Hermann Haller, Koji Yasutomo, Christian Kupatt, Kenneth M Murphy, Ralf H Adams, Christian Weber, Florian P Limbourg
No abstract text is available yet for this article.
May 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/28462044/the-impacts-of-drift-and-selection-on-genomic-evolution-in-insects
#4
K Jun Tong, Sebastián Duchêne, Nathan Lo, Simon Y W Ho
Genomes evolve through a combination of mutation, drift, and selection, all of which act heterogeneously across genes and lineages. This leads to differences in branch-length patterns among gene trees. Genes that yield trees with the same branch-length patterns can be grouped together into clusters. Here, we propose a novel phylogenetic approach to explain the factors that influence the number and distribution of these gene-tree clusters. We apply our method to a genomic dataset from insects, an ancient and diverse group of organisms...
2017: PeerJ
https://www.readbyqxmd.com/read/28448042/imaging-the-neutrophil-phagosome-and-cytoplasm-using-a-ratiometric-ph-indicator
#5
Juliet R Foote, Adam P Levine, Philippe Behe, Michael R Duchen, Anthony W Segal
Neutrophils are crucial to host innate defense and, consequently, constitute an important area of medical research. The phagosome, the intracellular compartment where the killing and digestion of engulfed particles take place, is the main arena for neutrophil pathogen killing that requires tight regulation. Phagosomal pH is one aspect that is carefully controlled, in turn regulating antimicrobial protease activity. Many fluorescent pH-sensitive dyes have been used to visualize the phagosomal environment. S-1 has several advantages over other pH-sensitive dyes, including its dual emission spectra, its resistance to photo-bleaching, and its high pKa...
April 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28414314/cell-competition-with-normal-epithelial-cells-promotes-apical-extrusion-of-transformed-cells-through-metabolic%C3%A2-changes
#6
Shunsuke Kon, Kojiro Ishibashi, Hiroto Katoh, Sho Kitamoto, Takanobu Shirai, Shinya Tanaka, Mihoko Kajita, Susumu Ishikawa, Hajime Yamauchi, Yuta Yako, Tomoko Kamasaki, Tomohiro Matsumoto, Hirotaka Watanabe, Riku Egami, Ayana Sasaki, Atsuko Nishikawa, Ikumi Kameda, Takeshi Maruyama, Rika Narumi, Tomoko Morita, Yoshiteru Sasaki, Ryosuke Enoki, Sato Honma, Hiromi Imamura, Masanobu Oshima, Tomoyoshi Soga, Jun-Ichi Miyazaki, Michael R Duchen, Jin-Min Nam, Yasuhito Onodera, Shingo Yoshioka, Junichi Kikuta, Masaru Ishii, Masamichi Imajo, Eisuke Nishida, Yoichiro Fujioka, Yusuke Ohba, Toshiro Sato, Yasuyuki Fujita
Recent studies have revealed that newly emerging transformed cells are often apically extruded from epithelial tissues. During this process, normal epithelial cells can recognize and actively eliminate transformed cells, a process called epithelial defence against cancer (EDAC). Here, we show that mitochondrial membrane potential is diminished in RasV12-transformed cells when they are surrounded by normal cells. In addition, glucose uptake is elevated, leading to higher lactate production. The mitochondrial dysfunction is driven by upregulation of pyruvate dehydrogenase kinase 4 (PDK4), which positively regulates elimination of RasV12-transformed cells...
May 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28410346/improved-survival-in-a-long-term-rat-model-of-sepsis-is-associated-with-reduced-mitochondrial-calcium-uptake-despite-increased-energetic-demand
#7
Bernardo B Pinto, Alex Dyson, Michele Umbrello, Jane E Carré, Cristiane Ritter, Innes Clatworthy, Michael R Duchen, Mervyn Singer
OBJECTIVES: To investigate the relationship between prognosis, changes in mitochondrial calcium uptake, and bioenergetic status in the heart during sepsis. DESIGN: In vivo and ex vivo controlled experimental studies. SETTING: University research laboratory. SUBJECTS: Male adult Wistar rats. INTERVENTIONS: Sepsis was induced by intraperitoneal injection of fecal slurry. Sham-operated animals served as controls...
April 13, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28348834/genome-scale-rates-of-evolutionary-change-in-bacteria
#8
Sebastian Duchêne, Kathryn E Holt, François-Xavier Weill, Simon Le Hello, Jane Hawkey, David J Edwards, Mathieu Fourment, Edward C Holmes
Estimating the rates at which bacterial genomes evolve is critical to understanding major evolutionary and ecological processes such as disease emergence, long-term host-pathogen associations and short-term transmission patterns. The surge in bacterial genomic data sets provides a new opportunity to estimate these rates and reveal the factors that shape bacterial evolutionary dynamics. For many organisms estimates of evolutionary rate display an inverse association with the time-scale over which the data are sampled...
November 2016: Microbial Genomics
https://www.readbyqxmd.com/read/28345102/a-highly-stable-sodium-solid-state-electrolyte-based-on-a-dodeca-deca-borate-equimolar-mixture
#9
L Duchêne, R-S Kühnel, D Rentsch, A Remhof, H Hagemann, C Battaglia
Na2(B12H12)0.5(B10H10)0.5, a new solid-state sodium electrolyte is shown to offer high Na(+) conductivity of 0.9 mS cm(-1) at 20 °C, excellent thermal stability up to 300 °C, and a large electrochemical stability window of 3 V including stability towards sodium metal anodes, all essential prerequisites for a stable room-temperature 3 V all-solid-state sodium-ion battery.
April 11, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28341808/protein-coalation-a-redox-regulated-protein-modification-by-coenzyme-ain-mammalian-cells
#10
Yugo Tsuchiya, Sew Peak-Chew, Clare Newell, Sheritta Miller-Aidoo, Sriyash Mangal, Alexander Zhyvoloup, Jovana Baković, Oksana Malanchuk, Gonçalo Pereira, Vassilios Kotiadis, Gyorgy Szabadkai, Michael Duchen, Mark Campbell, Sergio Rodriguez Cuenca, Antonio Vidal-Puig, Andrew James, Michael P Murphy, Valeriy Filonenko, Mark Skehel, Ivan Gout
Coenzyme A (CoA) is an obligatory cofactor in all branches of life. CoA and its derivatives are involved in major metabolic pathways, allosteric interactions and the regulation of gene expression. Abnormal biosynthesis and homeostasis of CoA and its derivatives have been associated with various human pathologies, including cancer, diabetes and neurodegeneration. Using an anti-CoA monoclonal antibody and mass spectrometry we identified a wide range of cellular proteins which are modified by covalent attachment of CoA to cysteine thiols (CoAlation)...
March 24, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28338310/metastatic-prostate-cancer-in-the-modern-era-of-psa-screening
#11
Philip A Fontenot, Avinash Nehra, William Parker, Hadley Wyre, Moben Mirza, David A Duchene, Jeffrey Holzbeierlein, James Brantley Thrasher, Peter Van Veldhuizen, Eugene K Lee
INTRODUCTION: To characterize initial presentation and PSA screening status in a contemporary cohort of men treated for metastatic prostate cancer at our institution. MATERIALS AND METHODS: We reviewed records of 160 men treated for metastatic prostate cancer between 2008-2014 and assessed initial presentation, categorizing patients into four groups. Groups 1 and 2 presented with localized disease and received treatment. These men suffered biochemical recurrence late (>1 year) or earlier (<1 year), respectively, and developed metastases...
March 24, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
https://www.readbyqxmd.com/read/28333201/new-statistical-criteria-detect-phylogenetic-bias-caused-by-compositional-heterogeneity
#12
David A Duchêne, Sebastian Duchêne, Simon Y W Ho
In statistical phylogenetic analyses of DNA sequences, models of evolutionary change commonly assume that base composition is stationary through time and across lineages. This assumption is violated by many data sets, but it is unclear whether the magnitude of these violations is sufficient to mislead phylogenetic inference. We investigated the impacts of compositional heterogeneity on phylogenetic estimates using a method for assessing model adequacy. Based on a detailed simulation study, we found that common frequentist criteria are highly conservative, such that the model is often rejected when the phylogenetic estimates do not show clear signs of bias...
June 1, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28325024/balance-quality-assessment-as-an-early-indicator-of-physical-frailty-in-older-people
#13
Aly Chkeir, Doha Safieddine, D Bera, M Collart, J L Novella, M Drame, David J Hewson, Jacques Duchene
Frailty is an increasingly common geriatric condition that results in an increased risk of adverse health outcomes such as falls. The most widely-used means of detecting frailty is the Fried phenotype, which includes several objective measures such as grip strength and gait velocity. One method of screening for falls is to measure balance, which can be done by a range of techniques including the assessment of the Centre of Pressure (CoP) during a balance assessment. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that can evaluate balance quality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28286806/assessment-of-cellular-redox-state-using-nad-p-h-fluorescence-intensity-and-lifetime
#14
Thomas S Blacker, Tunde Berecz, Michael R Duchen, Gyorgy Szabadkai
NADH and NADPH are redox cofactors, primarily involved in catabolic and anabolic metabolic processes respectively. In addition, NADPH plays an important role in cellular antioxidant defence. In live cells and tissues, the intensity of their spectrally-identical autofluorescence, termed NAD(P)H, can be used to probe the mitochondrial redox state, while their distinct enzyme-binding characteristics can be used to separate their relative contributions to the total NAD(P)H intensity using fluorescence lifetime imaging microscopy (FLIM)...
January 20, 2017: Bio-protocol
https://www.readbyqxmd.com/read/28273061/neanderthal-behaviour-diet-and-disease-inferred-from-ancient-dna-in-dental-calculus
#15
Laura S Weyrich, Sebastian Duchene, Julien Soubrier, Luis Arriola, Bastien Llamas, James Breen, Alan G Morris, Kurt W Alt, David Caramelli, Veit Dresely, Milly Farrell, Andrew G Farrer, Michael Francken, Neville Gully, Wolfgang Haak, Karen Hardy, Katerina Harvati, Petra Held, Edward C Holmes, John Kaidonis, Carles Lalueza-Fox, Marco de la Rasilla, Antonio Rosas, Patrick Semal, Arkadiusz Soltysiak, Grant Townsend, Donatella Usai, Joachim Wahl, Daniel H Huson, Keith Dobney, Alan Cooper
Recent genomic data have revealed multiple interactions between Neanderthals and modern humans, but there is currently little genetic evidence regarding Neanderthal behaviour, diet, or disease. Here we describe the shotgun-sequencing of ancient DNA from five specimens of Neanderthal calcified dental plaque (calculus) and the characterization of regional differences in Neanderthal ecology. At Spy cave, Belgium, Neanderthal diet was heavily meat based and included woolly rhinoceros and wild sheep (mouflon), characteristic of a steppe environment...
April 20, 2017: Nature
https://www.readbyqxmd.com/read/28265814/a-comparative-study-of-the-sensitivity-of-diffusion-related-parameters-obtained-from-diffusion-tensor-imaging-diffusional-kurtosis-imaging-q-space-analysis-and-bi-exponential-modelling-in-the-early-disease-course-24%C3%A2-h-of-hyperacute-6%C3%A2-h-ischemic-stroke-patients
#16
Gaëtan Duchêne, Frank Peeters, André Peeters, Thierry Duprez
OBJECTIVES: To compare the sensitivity and early temporal changes of diffusion parameters obtained from diffusion tensor imaging (DTI), diffusional kurtosis imaging (DKI), q-space analysis (QSA) and bi-exponential modelling in hyperacute stroke patients. MATERIALS AND METHODS: A single investigational acquisition allowing the four diffusion analyses was performed on seven hyperacute stroke patients with a 3T system. The percentage change between ipsi- and contralateral regions were compared at admission and 24 h later...
March 6, 2017: Magma
https://www.readbyqxmd.com/read/28262838/galectin-3-is-a-non-classic-rna-binding-protein-that-stabilizes-the-mucin-muc4-mrna-in-the-cytoplasm-of-cancer-cells
#17
Lucie Coppin, Audrey Vincent, Frédéric Frénois, Belinda Duchêne, Fatima Lahdaoui, Laurence Stechly, Florence Renaud, Céline Villenet, Isabelle Van Seuningen, Emmanuelle Leteurtre, Johann Dion, Cyrille Grandjean, Françoise Poirier, Martin Figeac, Delphine Delacour, Nicole Porchet, Pascal Pigny
Pancreatic cancer cells express high levels of MUC1, MUC4 and MUC16 mRNAs that encode membrane-bound mucins. These mRNAs share unusual features such as a long half-life. However, it remains unknown how mucin mRNA stability is regulated. Galectin-3 (Gal-3) is an endogenous lectin playing important biological functions in epithelial cells. Gal-3 is encoded by LGALS3 which is up-regulated in pancreatic cancer. Despite the absence of a RNA-recognition motif, Gal-3 interacts indirectly with pre-mRNAs in the nucleus and promotes constitutive splicing...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28227723/balance-quality-assessment-as-an-early-indicator-of-physical-frailty-in-older-people
#18
Aly Chkeir, Doha Safieddine, D Bera, M Collart, J L Novella, M Drame, David J Hewson, Jacques Duchene, Aly Chkeir, Doha Safieddine, D Bera, M Collart, J L Novella, M Drame, David J Hewson, Jacques Duchene, J L Novella, David J Hewson, Jacques Duchene, M Collart, Aly Chkeir, D Bera, M Drame, Doha Safieddine
Frailty is an increasingly common geriatric condition that results in an increased risk of adverse health outcomes such as falls. The most widely-used means of detecting frailty is the Fried phenotype, which includes several objective measures such as grip strength and gait velocity. One method of screening for falls is to measure balance, which can be done by a range of techniques including the assessment of the Centre of Pressure (CoP) during a balance assessment. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that can evaluate balance quality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217242/investigating-state-restriction-in-fluorescent-protein-fret-using-time-resolved-fluorescence-and-anisotropy
#19
Thomas S Blacker, WeiYue Chen, Edward Avezov, Richard J Marsh, Michael R Duchen, Clemens F Kaminski, Angus J Bain
Most fluorescent proteins exhibit multiexponential fluorescence decays, indicating a heterogeneous excited state population. FRET between fluorescent proteins should therefore involve multiple energy transfer pathways. We recently demonstrated the FRET pathways between EGFP and mCherry (mC), upon the dimerization of 3-phosphoinositide dependent protein kinase 1 (PDK1), to be highly restricted. A mechanism for FRET restriction based on a highly unfavorable κ(2) orientation factor arising from differences in donor-acceptor transition dipole moment angles in a far from coplanar and near static interaction geometry was proposed...
January 26, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
https://www.readbyqxmd.com/read/28204787/inference-of-evolutionary-jumps-in-large-phylogenies-using-levy-processes
#20
Pablo Duchen, Christoph Leuenberger, Sandor M Szilagyi, Luke Harmon, Jonathan Eastman, Manuel Schweizer, Daniel Wegmann
No abstract text is available yet for this article.
February 16, 2017: Systematic Biology
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