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https://www.readbyqxmd.com/read/29144771/bursal-sided-rotator-cuff-tears-simple-versus-everted-type
#1
Hwan Jin Kim, Jung Youn Kim, Young Moon Kee, Yong Girl Rhee
BACKGROUND: No studies have focused on the everted type of bursal-sided partial-thickness rotator cuff tears (PTRCTs). PURPOSE: To evaluate the radiological characteristics, arthroscopic findings, and clinical and structural outcomes after arthroscopic repair of the everted type of bursal-sided PTRCTs. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Two groups of patients with bursal-sided PTRCTs (simple type, 25 shoulders; everted type, 25 shoulders) were enrolled...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29143995/catalytic-synthesis-of-indolines-via-hydrogen-atom-transfer-to-cobalt-iii-carbene-radicals
#2
Alexander S Karns, Monalisa Goswami, Bas de Bruin
We report a new method for the synthesis of indolines from o-aminobenzylidine N-tosylhydrazones proceeding through a cobalt(III)-carbene radical intermediate. This methodology employs the use of inexpensive commercially-available reagents and allows for the transformation of easily derivatized benzaldehyde-derived precursors to functionalized indoline products. This transformation takes advantage of the known propensity of radicals to undergo rapid intramolecular 1,5-hydrogen atom transfer (1,5-HAT) to form more stabilized radical intermediates...
November 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29143395/a-novel-classification-scheme-to-decline-the-mortality-rate-among-women-due-to-breast-tumor
#3
Bushra Mughal, Muhammad Sharif, Nazeer Muhammad, Tanzila Saba
Early screening of skeptical masses or breast carcinomas in mammograms is supposed to decline the mortality rate among women. This amount can be decreased more on development of the computer-aided diagnosis with reduction of false suppositions in medical informatics. Our aim is to provide a robust tumor detection system for accurate classification of breast masses using normal, abnormal, benign, or malignant classes. The breast carcinomas are classified on the basis of observed classes. This is highly dependent on feature extraction process...
November 16, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29142490/postoperative-elevated-resistive-indices-do-not-predict-hepatic-artery-thrombosis-in-extended-criteria-donor-livers
#4
Eric J Siskind, Fauzia Vandermeer, Tamar R Siskind, David A Bruno, Samuel Sultan, Josue Alvarez-Casas, Arielle Stafford, Barton Lane, John C Lamattina, Rolf N Barth, Steven I Hanish
Postoperative transplant liver ultrasounds were analyzed in standard criteria donor (SCD), extended criteria donor (ECD), and donation after cardiac death (DCD) liver allografts to determine if elevated resistive indices (RIs) are consistently present and if they are pathological. Postoperative transplant liver ultrasounds were reviewed from 115 consecutive patients. Hepatic arterial RIs were stratified based on the type of donor: DCD, macrosteatosis (>30%), or standard criteria. In all patients with elevated RI, subsequent ultrasounds were reviewed to demonstrate RI normalization...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29142305/assay-interference-and-off-target-liabilities-of-reported-histone-acetyltransferase-inhibitors
#5
Jayme L Dahlin, Kathryn M Nelson, Jessica M Strasser, Dalia Barsyte-Lovejoy, Magdalena M Szewczyk, Shawna Organ, Matthew Cuellar, Gurpreet Singh, Jonathan H Shrimp, Nghi Nguyen, Jordan L Meier, Cheryl H Arrowsmith, Peter J Brown, Jonathan B Baell, Michael A Walters
Many compounds with potentially reactive chemical motifs and poor physicochemical properties are published as selective modulators of biomolecules without sufficient validation and then propagated in the scientific literature as useful chemical probes. Several histone acetyltransferase (HAT) inhibitors with these liabilities are now routinely used to probe epigenetic pathways. We profile the most commonly used HAT inhibitors and confirm that the majority of them are nonselective interference compounds. Most (15 out of 23, 65%) of the inhibitors are flagged by ALARM NMR, an industry-developed counter-screen for promiscuous compounds...
November 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/29141908/two-distinct-regulatory-mechanisms-of-transcriptional-initiation-in-response-to-nutrient-signaling
#6
Jannatul Ferdoush, Rwik Sen, Amala Kaja, Priyanka Barman, Sukesh R Bhaumik
SAGA (Spt-Ada-Gcn5-Acetyltransferase) and TFIID (transcription factor IID) have been previously shown to facilitate the PIC (pre-initiation complex) formation at the promoters of two distinct sets of genes. Here, we demonstrate that TFIID and SAGA differentially participate in stimulation of the PIC formation (and hence transcriptional initiation) at the promoter of PHO84, a gene for high affinity inorganic phosphate (Pi) transporter for crucial cellular functions, in response to nutrient signaling. We show that transcriptional initiation of PHO84 occurs predominantly in the TFIID-dependent manner in the absence of Pi in the growth medium...
November 15, 2017: Genetics
https://www.readbyqxmd.com/read/29141141/electronic-and-torsional-effects-on-hydrogen-atom-transfer-from-aliphatic-c-h-bonds-a-kinetic-evaluation-via-reaction-with-the-cumyloxyl-radical
#7
Michela Salamone, Teo Martin, Michela Milan, Miquel Costas, Massimo Bietti
A kinetic study on the HAT reactions from the aliphatic C-H bonds of a series of 1-Z-pentyl, 1-Z-propyl and Z-cyclohexyl derivatives, and of a series of N-alkylamides and N-alkylphthalimides to the electrophilic cumyloxyl radical (CumO•) has been carried out. With 1-pentyl and 1-propyl derivatives, α-CH2 activation towards CumO• is observed for Z = Ph, OH, NH2, NHAc, evidenced by an increase in kH as compared to the unsubstituted alkane substrate. A decrease in kH has been instead measured for Z = OAc, NPhth, CO2Me, Cl, Br, CN, indicative of α-CH2 deactivation with HAT that predominantly occurs from the most remote methylenic site...
November 15, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29136583/heterocyclic-schiff-bases-as-non-toxic-antioxidants-solvent-effect-structure-activity-relationship-and-mechanism-of-action
#8
Angamaly Antony Shanty, Puzhavoorparambil Velayudhan Mohanan
Phenolic heterocyclic imine based Schiff bases from Thiophene-2-carboxaldehyde and Pyrrole-2-carboxaldehyde were synthesized and characterized as novel antioxidants. The solvent effects of these Schiff bases were determined and compared with standard antioxidants, BHA employing DPPH assay and ABTS assay. Fixed reaction time and Steady state measurement were used for study. IC50 and EC50 were calculated. Structure-activity relationship revealed that the electron donating group in the phenolic ring increases the activity where as the electron withdrawing moiety decreases the activity...
November 7, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29131822/impact-of-the-ebola-outbreak-on-trypanosoma-brucei-gambiense-infection-medical-activities-in-coastal-guinea-2014-2015-a-retrospective-analysis-from-the-guinean-national-human-african-trypanosomiasis-control-program
#9
Mariame Camara, Eric Ouattara, Alexandre Duvignaud, René Migliani, Oumou Camara, Mamadou Leno, Philippe Solano, Bruno Bucheton, Mamadou Camara, Denis Malvy
BACKGROUND: The 2014-2015 Ebola outbreak massively hit Guinea. The coastal districts of Boffa, Dubreka and Forecariah, three major foci of Human African Trypanosomiasis (HAT), were particularly affected. We aimed to assess the impact of this epidemic on sleeping sickness screening and caring activities. METHODOLOGY/PRINCIPAL FINDINGS: We used preexisting data from the Guinean sleeping sickness control program, collected between 2012 and 2015. We described monthly: the number of persons (i) screened actively; (ii) or passively; (iii) treated for HAT; (iv) attending post-treatment follow-up visits...
November 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29131190/tailoring-lens-functionality-by-3d-laser-printing
#10
Shlomi Lightman, Gilad Hurvitz, Raz Gvishi, Ady Arie
Conversion of a Gaussian beam into a top-hat beam or to an annular beam is demonstrated using 3D direct laser printing. Micron-scale refractive phase elements were designed and printed directly on standard commercially available lenses. These structures modify the phase of the incoming beam into either three intensity-flattened profiles, having line, square, or circular shapes, or to an annular beam profile. This method to functionalize lenses opens new and exciting opportunities for compact and robust beam shaping, as well as for reduction of the aberrations of the lens itself...
November 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29129676/exercise-enhances-cognitive-function-and-neurotrophin-expression-in-the-hippocampus-accompanied-by-changes-in-epigenetic-programming-in-senescence-accelerated-mice
#11
Hiroshi Maejima, Naohiko Kanemura, Takanori Kokubun, Kenji Murata, Kiyomi Takayanagi
Aerobic exercise is known to increase expression of neurotrophins, particularly brain-derived neurotrophic factor (BDNF), in the hippocampus and to improve cognitive function. Exercise exerts neuroprotective effects in the hippocampus by inducing epigenetic changes, which play crucial roles in aging and neurodegenerative diseases. Specifically, the activity levels of histone acetyltransferases (HATs) and histone deacetylases (HDACs) regulate histone acetylation and modulate gene transcription. The objective of the present study was to assess the interactive effects of exercise and aging on cognitive function, expression of neurotrophins (BDNF and neurotrophin-4) and their receptors (tyrosine receptor kinase B and p75), and epigenetic regulations, including the activity of HATs and HADCs in the hippocampus...
November 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29125744/design-and-synthesis-of-brain-penetrant-trypanocidal-n-myristoyltransferase-inhibitors
#12
Tracy Bayliss, David A Robinson, Victoria C Smith, Stephen Brand, Stuart P McElroy, Leah S Torrie, Chido Mpamhanga, Suzanne Norval, Laste Stojanovski, Ruth Brenk, Julie A Frearson, Kevin D Read, Ian H Gilbert, Paul G Wyatt
N-Myristoyltransferase (NMT) represents a promising drug target within the parasitic protozoa Trpanosoma brucei (T. brucei), the causative agent for human African trypanosomiasis (HAT) or sleeping sickness. We have previously validated T. brucei NMT as a promising druggable target for the treatment of HAT in both stage 1 and 2 of the disease. We report on the use of the previously reported DDD85646 (1) as a start point for the design of a class of potent, brain penetrant inhibitors of T. brucei NMT.
November 10, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29123019/photoredox-catalyzed-deuteration-and-tritiation-of-pharmaceutical-compounds
#13
Yong Yao Loh, Kazunori Nagao, Andrew J Hoover, David Hesk, Nelo R Rivera, Steven L Colletti, Ian W Davies, David W C MacMillan
Deuterium- and tritium-labeled pharmaceutical compounds are pivotal diagnostic tools in pharmaceutical drug discovery research, providing vital information about the biological fate of drugs and drug metabolites. Herein, we demonstrate that a photoredox-mediated hydrogen atom transfer (HAT) protocol can efficiently and selectively install deuterium and tritium at α-amino sp(3) C-H bonds in a single step, using isotopically labeled water (D2O or T2O) as the source of hydrogen isotope. In this context, we also report a convenient synthesis of T2O from T2, providing access to high specific activity T2O...
November 9, 2017: Science
https://www.readbyqxmd.com/read/29122847/human-airway-trypsin-like-protease-exerts-potent-antifibrotic-action-in-pulmonary-fibrosis
#14
Awen Menou, Pauline Flajolet, JanWillem Duitman, Aurélien Justet, Sophie Moog, Madeleine Jaillet, Laure Tabèze, Brigitte Solhonne, Marc Garnier, Hervé Mal, Pierre Mordant, Yves Castier, Aurélie Cazes, Jean-Michel Sallenave, Arnaud A Mailleux, Bruno Crestani
Idiopathic pulmonary fibrosis (IPF) is characterized by the deposition of excessive extracellular matrix and the destruction of lung parenchyma, resulting from an aberrant wound-healing response. Although IPF is often associated with an imbalance in protease activity, the mechanisms underlying the sustained repair mechanisms are not fully understood. Here, we addressed the role of the recently identified, membrane-anchored serine protease human airway trypsin-like protease (HAT). In the present study, we show that both HAT expression and activity were up-regulated in human IPF specimens...
November 9, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29113731/oral-fexinidazole-for-late-stage-african-trypanosoma-brucei-gambiense-trypanosomiasis-a-pivotal-multicentre-randomised-non-inferiority-trial
#15
Victor Kande Betu Ku Mesu, Wilfried Mutombo Kalonji, Clélia Bardonneau, Olaf Valverde Mordt, Séverine Blesson, François Simon, Sophie Delhomme, Sonja Bernhard, Willy Kuziena, Jean-Pierre Fina Lubaki, Steven Lumeya Vuvu, Pathou Nganzobo Ngima, Hélène Mahenzi Mbembo, Médard Ilunga, Augustin Kasongo Bonama, Josué Amici Heradi, Jean Louis Lumaliza Solomo, Guylain Mandula, Lewis Kaninda Badibabi, Francis Regongbenga Dama, Papy Kavunga Lukula, Digas Ngolo Tete, Crispin Lumbala, Bruno Scherrer, Nathalie Strub-Wourgaft, Antoine Tarral
BACKGROUND: Few therapeutic options are available to treat late-stage human African trypanosomiasis, a neglected tropical disease caused by Trypanosoma brucei gambiense (g-HAT). The firstline treatment nifurtimox eflornithine combination therapy needs to be administered intravenously in a hospital setting by trained personnel, which is not optimal, given that patients often live in remote areas with few health resources. Therefore, we aimed to assess the safety and efficacy of an oral regimen of fexinidazole (a 2-substituted 5-nitroimidazole with proven trypanocidal activity) versus nifurtimox eflornithine combination therapy in patients with late-stage g-HAT...
November 3, 2017: Lancet
https://www.readbyqxmd.com/read/29112810/electronic-effects-on-room-temperature-gas-phase-c-h-bond-activations-by-cluster-oxides-and-metal-carbides-the-methane-challenge
#16
Helmut Schwarz, Sason Shaik, Jilai Li
This Perspective discusses a story of one molecule (methane), a few metal-oxide cationic clusters (MOCCs), dopants, metal-carbide cations, oriented-electric fields (OEFs), and a dizzying mechanistic landscape of methane activation! One mechanism is hydrogen atom transfer (HAT), which occurs whenever the MOCC possesses a localized oxyl radical (M-O(•)). Whenever the radical is delocalized, e.g., in [MgO]n(•+) the HAT barrier increases due to the penalty of radical localization. Adding a dopant (Ga2O3) to [MgO]2(•+) localizes the radical and HAT transpires...
November 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29110471/microscale-dynamics-of-oil-droplets-at-a-membrane-surface-deformation-reversibility-and-implications-for-fouling
#17
Gali Fux, Guy Z Ramon
Despite their excellent capabilities, wide implementation of membranes for oil/water emulsion separation is limited due to severe fouling. To date, microscale dynamics of the oil-water-membrane system are poorly understood. The present study uses confocal microscopy at unprecedented resolution for direct observation of oil droplet deposition, deformation, and detachment during separation and cleaning, respectively. The 3D shape of the droplets was imaged as a function of the permeation rate, J, droplet radius, R, membrane permeance, k, water viscosity, μ, and the water/oil interfacial tension coefficient, σ...
November 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29107243/new-evidence-for-primordial-action-site-of-fluazifop-p-butyl-on-acanthospermum-hispidum-seedlings-from-the-effects-on-chlorophyll-fluorescence-characteristics-and-histological-observation
#18
Yuhong Shang, Congjun Yang, Zhihang Liu, Jiqing Song, Pingliang Li, Lingxu Li, Fei Zhou, Hua Xin, Fanghao Wan, Hiroshi Matsumoto, Xiaoyong Luo
Acanthospermum hispidum DC, an Asteraceae weed species, was very susceptible to fluazifop-P-butyl, but tolerant to other aryloxyphenoxypropionate herbicides, such as haloxyfop-P-methyl. However, other Asteraceae weeds including Bidens pilosa were all tolerant to fluazifop-P-butyl. Membrane lipid peroxidation by increasing the levels of reactive oxygen species (ROS) was proposed as an action mechanism of fluazifop-P-butyl in A. hispidum. To further clarify the primordial action site of fluazifop-P-butyl in this species, the effects on chlorophyll fluorescence characteristics and cytohistology of apical meristems were studied...
October 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29106842/hats-off-a-study-of-different-operating-room-headgear-assessed-by-environmental-quality-indicators
#19
Troy A Markel, Thomas Gormley, Damon Greeley, John Ostojic, Angie Wise, Jonathan Rajala, Rahul Bharadwaj, Jennifer Wagner
BACKGROUND: The effectiveness of operating room headgear in preventing airborne contamination has been called into question. We hypothesized that bouffant style hats would be as effective in preventing bacterial and particulate contamination in the operating room compared with disposable or cloth skull caps, and bouffant style hats would have similar permeability, particle penetration, and porosity compared with skull caps. STUDY DESIGN: Disposable bouffant and skull cap hats and newly laundered cloth skull caps were tested...
November 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/29101944/wolf-hat-by-preston-singletary
#20
Margaret R Wentz
Recognizing the contribution art has had in the Mayo Clinic environment since the original Mayo Clinic Building was finished in 1914, Mayo Clinic Proceedings features some of the numerous works of art displayed throughout the buildings and grounds on Mayo Clinic campuses as interpreted by the author.
November 2017: Mayo Clinic Proceedings
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