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https://www.readbyqxmd.com/read/28240004/gut-microbiota-and-pancreatic-diseases
#1
Marianna Signoretti, Roberta Roggiolani, Caterina Stornello, Gianfranco Delle Fave, Gabriele Capurso
Changes in diet, lifestyle and exposition to environmental risk factors account for the increased incidence of pancreatic disorders, including acute and chronic pancreatitis, and pancreatic cancer. The role of the microbiome in the development of pancreatic disorders is increasingly recognized. The translocation of gut bacteria and endotoxins following gut barrier failure is a key event contributing to the severity of acute pancreatitis, while small intestine bacterial overgrowth is common in patients with chronic pancreatitis and further worsens their symptoms and malnutrition...
February 24, 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28239986/molecular-analysis-of-the-early-interaction-between-the-grapevine-flower-and-botrytis-cinerea-reveals-that-prompt-activation-of-specific-host-pathways-leads-to-fungus-quiescence
#2
Zeraye H Mehari, Stefania Pilati, Paolo Sonego, Giulia Malacarne, Urska Vrhovsek, Kristof Engelen, Paul Tudzynski, Michela Zottini, Elena Baraldi, Claudio Moser
Grapes quality and yield can be impaired by bunch rot, caused by the necrotrophic fungus Botrytis cinerea. Infection often occurs at flowering and the pathogen stays quiescent until fruit maturity. Here, we report a molecular analysis of the early interaction between B. cinerea and Vitis vinifera flowers, using a controlled infection system, confocal microscopy and integrated transcriptomic and metabolic analysis of the host and the pathogen. Flowers from fruiting cuttings of the cv. Pinot Noir were infected with GFP-labeled B...
February 27, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28239975/preparing-to-read-the-ubiquitin-code-top-down-analysis-of-unanchored-ubiquitin-tetramers
#3
Amanda E Lee, Lucia Geis-Asteggiante, Emma K Dixon, Meredith Miller, Yan Wang, David Fushman, Catherine Fenselau
The characterization of polyubiquitin chains has been an analytical challenge for several decades. It has been shown that anchored and unanchored polyubiquitin chains with different isopeptide linkages and lengths exhibit a wide range of profoundly different cellular functions. However, structure function studies have been hindered by the difficulty of characterizing these complex chain structures. This report presents a broadly applicable workflow to characterize ubiquitin tetramers without the need for genetic mutations or reiterative immunoprecipitations...
August 2016: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28239971/characterization-of-n-methylated-amino-acids-by-gc-ms-after-ethyl-chloroformate-derivatization
#4
B Sudarshana Reddy, V Naresh Chary, P Pavankumar, S Prabhakar
Methylation is an essential metabolic process in the biological systems, and it is significant for several biological reactions in living organisms. Methylated compounds are known to be involved in most of the bodily functions, and some of them serve as biomarkers. Theoretically, all α-amino acids can be methylated, and it is possible to encounter them in most animal/plant samples. But the analytical data, especially the mass spectral data, are available only for a few of the methylated amino acids. Thus, it is essential to generate mass spectral data and to develop mass spectrometry methods for the identification of all possible methylated amino acids for future metabolomic studies...
August 2016: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28239935/isolation-and-characterization-of-an-atypical-siberian-sturgeon-herpesvirus-strain-in-russia-novel-north-american-acipenserid-herpesvirus-2-strain-in-europe
#5
A Doszpoly, I M Kalabekov, R Breyta, I S Shchelkunov
Siberian sturgeon herpesvirus (SbSHV) was isolated in Russia for the first time in 2006. Nine SbSHV isolates were recovered from different fish hatcheries producing the same cytopathic effect in cell cultures, the same clinical signs and mortality kinetics in virus-infected fish and the same virus neutralization pattern and shared identical nucleotide sequences. In 2011, a new isolate was recovered from juvenile sturgeon, which caused completely different cytopathic effect. That isolate was not readily neutralized by Siberian sturgeon hyperimmune antisera, and its DNA was not recognized by the routine PCR developed for SbSHV detection...
February 27, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28239926/documenting-dna-in-the-dust
#6
M T P Gilbert
I bought a robotic vacuum cleaner this summer and set it to work. Although my initial expectations were not high, my robot (christened Buddy) finished its cleaning cycle, and then insistently demanded that I empty its dust collection box. As I took the box out, my jaw dropped. I live in a modern house, we don't have pets, and I like to think that I keep it reasonably dust free. But, there was much dust in that box. And when I ran it again 2 days later, the same thing happened. And indeed, every 2 days, Buddy dutifully goes to work, and sucks up a similarly impressive quantity...
February 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28239901/molecular-prevalence-of-merkel-cell-polyomavirus-in-nonmelanoma-skin-cancer-in-a-brazilian-population
#7
T R Bellott, C F Baez, S G Almeida, M T Venceslau, M G Zalis, M A Guimarães, M C Rochael, F B Luz, R B Varella, J R Almeida
BACKGROUND: Merkel cell polyomavirus (MCPyV), a newly described oncogenic virus, has been found in association with tumours other than Merkel cell carcinoma (MCC). As yet, little is known about the involvement or influence of MCPyV on the development of these tumours and its prevalence in various populations. AIM: To assess the prevalence of MCPyV DNA in cases of nonmelanoma skin cancer (NMSC). METHODS: The prevalence of MCPyV DNA was assessed in 96 cases of NMSC in a Brazilian population comprising 76 subjects, and these results were correlated with epidemiological and demographical data...
February 27, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28239886/fibrocartilaginous-mesenchymoma-of-bone-a-single-institution-experience-with-molecular-investigations-and-a-review-of-the-literature
#8
M Gambarotti, A Righi, D Vanel, S Cocchi, S Benini, F M Elli, G Mantovani, P Ruggieri, S Boriani, D Donati, M Sbaraglia, A P Dei Tos, P Picci
AIMS: Fibrocartilaginous mesenchymoma is a rare intraosseous lesion with a total of 25 cases described in the literature. This study describes the clinical, radiological, and histological features of eight new cases of fibrocartilaginous mesenchymoma collected at a single institution between 1982 and 2016. The presence of GNAS and IDH1/2 mutations and MDM2 amplification was explored to evaluate possible links between fibrocartilaginous mesenchymoma, fibrous dysplasia, dedifferentiated chondrosarcoma, and low-grade osteosarcoma...
February 26, 2017: Histopathology
https://www.readbyqxmd.com/read/28239874/habitat-segregation-and-cryptic-adaptation-of-species-of-periophthalmus-gobioidei-gobiidae
#9
G Polgar, S Zaccara, M Babbucci, F Fonzi, C M Antognazza, N Ishak, Z Sulaiman, G Crosa
A study was conducted on the habitat distribution of four sympatric species of Periophthalmus (the silver-lined mudskipper Periophthalmus argentilineatus, the slender mudskipper Periophthalmus gracilis, the kalolo mudskipper Periophthalmus kalolo and the Malacca mudskipper Periophthalmus malaccensis) from northern Sulawesi. Molecular phylogenetic reconstructions based on one mtDNA marker (16S) were used to validate the morphological taxa, identifying five molecular clades. Periophthalmus argentilineatus includes two molecular species, which are named Periophthalmus argentilineatus clades F and K...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239819/mir-137-and-its-target-tgfa-modulate-cell-growth-and-tumorigenesis-of-non-small-cell-lung-cancer
#10
X Liu, L Chen, X-D Tian, T Zhang
OBJECTIVE: MiR-137 has been reported to serve as a tumor suppressor in non-small cell lung cancer (NSCLC). However, the potential mechanism remains largely unclear. The present study aimed to explore the potential molecular mechanisms by which miR-137 regulated NSCLC. MATERIALS AND METHODS: Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) was used to quantify the expression levels of miR-137 in NSCLC tissues and cell lines. Dual-luciferase reporter assay was employed to confirm the specificity of miR-137 target genes...
February 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28239789/impairment-of-energy-dependent-processes-in-the-muscle-tissue-as-a-pathogenetic-mechanism-of-statin-induced-myopathy
#11
Z I Mikashinovich, E S Belousova, O G Sarkisyan
Administration of simvastatin was followed by a decrease in activities of superoxide dismutase and cytochrome oxidase in rat mitochondria, which attested to dysfunction of the respiratory chain. The decrease in total ATPase and Ca(2+)-ATPase activities in muscle tissue homogenates reflected impaired transport of active cations essential for muscle contraction. We conclude that abnormal relationships in the system of energy synthetic and energy-dependent processes in myocytes serve as the molecular basis for the formation of statin-induced degenerative changes...
February 27, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28239780/sesamin-extends-lifespan-through-pathways-related-to-dietary-restriction-in-caenorhabditis-elegans
#12
Yumiko Nakatani, Yukie Yaguchi, Tomomi Komura, Masakazu Nakadai, Kenji Terao, Eriko Kage-Nakadai, Yoshikazu Nishikawa
PURPOSE: Sesamin, a polyphenolic compound found in sesame seeds, has been reported to exert a variety of beneficial health effects. We have previously reported that sesamin increases the lifespan of Caenorhabditis elegans. In this study, we investigated the molecular mechanisms underlying the longevity effect of sesamin in C. elegans. METHODS: Starting from three days of age, Caenorhabditis elegans animals were fed a standard diet alone or supplemented with sesamin...
February 26, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28239773/high-resolution-solid-state-nmr-spectroscopy-of-the-yersinia-pestis-outer-membrane-protein-ail-in-lipid-membranes
#13
Yong Yao, Samit Kumar Dutta, Sang Ho Park, Ratan Rai, L Miya Fujimoto, Andrey A Bobkov, Stanley J Opella, Francesca M Marassi
The outer membrane protein Ail (Adhesion invasion locus) is one of the most abundant proteins on the cell surface of Yersinia pestis during human infection. Its functions are expressed through interactions with a variety of human host proteins, and are essential for microbial virulence. Structures of Ail have been determined by X-ray diffraction and solution NMR spectroscopy, but those samples contained detergents that interfere with functionality, thus, precluding analysis of the structural basis for Ail's biological activity...
February 26, 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/28239748/%C3%AE-synuclein-s-uniquely-long-amphipathic-helix-enhances-its-membrane-binding-and-remodeling-capacity
#14
Anthony R Braun, Michael M Lacy, Vanessa C Ducas, Elizabeth Rhoades, Jonathan N Sachs
α-Synuclein is the primary protein found in Lewy bodies, the protein and lipid aggregates associated with Parkinson's disease and Lewy body dementia. The protein folds into a uniquely long amphipathic α-helix (AH) when bound to a membrane, and at high enough concentrations, it induces large-scale remodeling of membranes (tubulation and vesiculation). By engineering a less hydrophobic variant of α-Synuclein, we previously showed that the energy associated with binding of α-Synuclein's AH correlates with the extent of membrane remodeling (Braun et al...
February 26, 2017: Journal of Membrane Biology
https://www.readbyqxmd.com/read/28239732/catalytic-decomposition-and-mechanism-of-formaldehyde-over-pt-al2o3-molecular-sieves-at-room-temperature
#15
Xiaofeng Zhu, Jiaguo Yu, Chuanjia Jiang, Bei Cheng
To overcome the drawbacks of powder-like catalysts in practical application, an Al2O3 molecular sieve supported Pt (Pt-Al2O3) catalyst was prepared by the impregnation method combined with dilute hydrochloric acid solution pretreatment. The role of the pretreatment solution in catalyst preparation and formaldehyde (HCHO) decomposition over Pt-Al2O3 catalysts was investigated. The acid solution with pH = 1 was optimal for Pt dispersion on the Al2O3 surface. The Pt-Al2O3 catalyst was capable of achieving complete and stable HCHO oxidation at ambient temperature...
February 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28239731/formation-of-hybrid-abx3-perovskite-compounds-for-solar-cell-application-first-principles-calculations-of-effective-ionic-radii-and-determination-of-tolerance-factors
#16
Markus Becker, Thorsten Klüner, Michael Wark
The development of hybrid organic-inorganic perovskite solar cells is one of the most rapidly growing fields in the photovoltaic community and is on its way to challenge polycrystalline silicon and thin film technologies. High power conversion efficiencies can be achieved by simple processing with low cost. However, due to the limited long-term stability and environmental toxicity of lead in the prototypic CH3NH3PbI3, there is a need to find alternative ABX3 constitutional combinations in order to promote commercialization...
February 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28239722/transient-inhomogeneous-flow-patterns-in-supercooled-liquids-under-shear
#17
Ingo Fuereder, Patrick Ilg
Supercooled liquids and other soft glassy systems show characteristic spatial inhomogeneities in their local dynamical properties. Using detailed molecular dynamics simulations, we find that for sufficiently low temperatures and sufficiently high shear rates supercooled liquids also show transient inhomogeneous flow patterns (shear banding) in the start-up of steady shear flow, similar to what has already been observed for many other soft glassy systems. We verify that the onset of transient shear banding coincides quite well with the appearance of a stress overshoot for temperatures in the supercooled regime...
February 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28239718/solvent-control-of-intramolecular-proton-transfer-is-4-hydroxy-3-piperidin-1-ylmethyl-1-naphthaldehyde-a-proton-crane
#18
Y Manolova, H Marciniak, S Tschierlei, F Fennel, F S Kamounah, S Lochbrunner, L Antonov
The solvent dependent excited state dynamics of 4-hydroxy-3-(piperidin-1-ylmethyl)-1-naphthaldehyde (compound 2), a candidate for a molecular switch based on intramolecular proton transfer, was investigated by ultrafast spectroscopy and quantum-chemical calculations. In acetonitrile a mixture of molecules in the enol and zwitterionic proton transfer (PT) form exists in the ground state. However, the zwitterion is the energetically favored one in the electronically excited state. Optical excitation of the enol form results in intramolecular proton transfer and formation of the PT form within 1...
February 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28239703/the-effect-of-active-fluctuations-on-the-dynamics-of-particles-motors-and-dna-hairpins
#19
Hans Vandebroek, Carlo Vanderzande
Inspired by recent experiments on the dynamics of particles and polymers in artificial cytoskeletons and in cells, we introduce a modified Langevin equation for a particle in an environment that is a viscoelastic medium and that is brought out of equilibrium by the action of active fluctuations caused by molecular motors. We show that within such a model, the motion of a free particle crosses over from superdiffusive to subdiffusive as observed for tracer particles in an in vitro cytoskeleton or in a cell. We investigate the dynamics of a particle confined by a harmonic potential as a simple model for the motion of the tethered head of kinesin-1...
February 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28239700/light-driven-rotary-molecular-motors-without-point-chirality-a-minimal-design
#20
Jun Wang, Baswanth Oruganti, Bo Durbeej
A fundamental requirement for achieving photoinduced unidirectional rotary motion about an olefinic bond in a molecular motor is that the potential energy surface of the excited state is asymmetric with respect to clockwise and counterclockwise rotations. In most available light-driven rotary molecular motors, such asymmetry is guaranteed by the presence of a stereocenter. Here, we present non-adiabatic molecular dynamics simulations based on multiconfigurational quantum chemistry to demonstrate that this chiral feature is not essential for inducing unidirectional rotary motion in molecules that incorporate a cyclohexenylidene moiety into a protonated Schiff-base framework...
February 27, 2017: Physical Chemistry Chemical Physics: PCCP
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