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https://www.readbyqxmd.com/read/29140247/ddm1-and-lsh-remodelers-allow-methylation-of-dna-wrapped-in-nucleosomes
#1
David B Lyons, Daniel Zilberman
Cytosine methylation regulates essential genome functions across eukaryotes, but the fundamental question of whether nucleosomal or naked DNA is the preferred substrate of plant and animal methyltransferases remains unresolved. Here, we show that genetic inactivation of a single DDM1/Lsh family nucleosome remodeler biases methylation toward inter-nucleosomal linker DNA in Arabidopsis thaliana and mouse. We find that DDM1 enables methylation of DNA bound to the nucleosome, suggesting that nucleosome-free DNA is the preferred substrate of eukaryotic methyltransferases in vivo...
November 15, 2017: ELife
https://www.readbyqxmd.com/read/29134856/boston-offender-needs-delivery-project
#2
Leila Salem, Emily Reichert, Julianne Siegfriedt, Taylor Hall, Stephanie W Hartwell
To bridge a gap in access to community services for releasing state inmates, the Boston Offender Needs Delivery (BOND) project was developed as a longitudinal study (2014-2016) of adult inmates with a history of substance use and co-occurring mental health disorders returning to the community following detention in one of Massachusetts' State correctional facilities. Pre-release inmates who were wrapping up their sentence (i.e., no community supervision) and presented with mental illness and/or substance use disorder were recruited...
November 1, 2017: International Journal of Offender Therapy and Comparative Criminology
https://www.readbyqxmd.com/read/29134216/multiple-interaction-regulated-phase-transition-behavior-of-thermo-responsive-copolymers-containing-cationic-poly-ionic-liquid-s
#3
Yingna Zhang, Hui Tang, Peiyi Wu
The effect of multiple interactions including anion-macromolecule interaction, water-mediated ion-macromolecule interaction and hydrophobic interaction on the phase transition behaviors of random copolymers P(OEGMA-co-BVIm[X]) comprising oligo(ethylene glycol)methacrylate (OEGMA) and imidazolium-based ionic liquids is investigated in the present study. Temperature-variable (1)H NMR and FT-IR investigations demonstrated that the hydration of CH2 side chains in P(OEGMA-co-BVIm[SCN]) was enhanced due to the anion-dipole interaction between a chaotropic anion SCN(-) and CH2 groups, and dehydration of C[double bond, length as m-dash]O groups served as the driving force of phase transition...
November 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29131586/single-walled-carbon-nanotubes-probed-with-insulator-based-dielectrophoresis
#4
Mohammad Towshif Rabbani, Christoph F Schmidt, Alexandra Ros
Single-walled carbon nanotubes (SWNTs) offer unique electrical and optical properties. Common synthesis processes yield SWNTs with large length polydispersity (several tens of nanometers up to centimeters) and heterogeneous electrical and optical properties. Applications often require suitable selection and purification. Dielectrophoresis is one manipulation method for separating SWNTs based on dielectric properties and geometry. Here, we present a study of surfactant and ssDNA wrapped SWNTs suspended in aqueous solutions manipulated by insulator-based dielectrophoresis (iDEP)...
November 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29130519/velocity-reconstruction-with-nonconvex-optimization-for-low-velocity-encoding-phase-contrast-mri
#5
Michael Loecher, Daniel B Ennis
PURPOSE: To introduce and demonstrate a nonconvex optimization method for reconstructing velocity data from low-velocity-encoding (Venc ) phase-contrast MRI data. THEORY AND METHODS: Solving for velocity values from phase-contrast MRI data was formulated as a nonconvex optimization problem. Weighting was added to account for intravoxel dephasing, and a Laplacian-based regularization was used to account for residual velocity aliasing. The reconstruction was tested with two low-Venc schemes: dual-Venc and a multidirectional high-moment encoding...
November 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29128907/a-new-conditionally-immortalized-human-fetal-brain-pericyte-cell-line-establishment-and-functional-characterization-as-a-promising-tool-for-human-brain-pericyte-studies
#6
Kenta Umehara, Yuchen Sun, Satoshi Hiura, Koki Hamada, Motoyuki Itoh, Keita Kitamura, Motohiko Oshima, Atsushi Iwama, Kosuke Saito, Naohiko Anzai, Kan Chiba, Hidetaka Akita, Tomomi Furihata
While pericytes wrap around microvascular endothelial cells throughout the human body, their highest coverage rate is found in the brain. Brain pericytes actively contribute to various brain functions, including the development and stabilization of the blood-brain barrier (BBB), tissue regeneration, and brain inflammation. Accordingly, detailed characterization of the functional nature of brain pericytes is important for understanding the mechanistic basis of brain physiology and pathophysiology. Herein, we report on the development of a new human brain pericyte cell line, hereafter referred to as the human brain pericyte/conditionally immortalized clone 37 (HBPC/ci37)...
November 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29127961/fundoplication
#7
REVIEW
Bethany J Slater, Steven S Rothenberg
Gastroesophageal reflux disease (GERD) is a common condition in infants. Symptoms from pathologic GERD include regurgitation, irritability when feeding, failure to thrive, and respiratory problems. Treatment typically starts with dietary modifications and postural changes. Antireflux medications may then be added. Indications for operative management in neonates and infants include poor weight gain, failure to thrive, acute life-threatening events, and continued respiratory symptoms. Laparoscopic Nissen fundoplication has become the standard of care for surgical treatment of children with GERD...
December 2017: Clinics in Perinatology
https://www.readbyqxmd.com/read/29125283/high-lithium-storage-capacity-and-long-cycling-life-fe3s4-anodes-with-reversible-solid-electrolyte-interface-film-and-sandwiched-reduced-graphene-oxide-shell
#8
Yu-Jiao Zhang, Jin Qu, Shu-Meng Hao, Wei Chang, Qiu-Yu Ji, Zhong-Zhen Yu
Increasing demands for lithium-ion batteries (LIBs) with high energy density and high power density require highly reversible electrochemical reactions to enhance the cyclability and capacities of electrodes. As the reversible formation/decomposition of solid electrolyte interface (SEI) film during the lithiation/delithiation process of Fe3S4 could bring about a higher capacity than its theoretical value, in the present work, synthesized Fe3S4 nanoparticles are sandwich wrapped with reduced graphene oxide (RGO) to fabricate highly reversible and long cycling life anode materials for high-performance LIBs...
November 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29124558/development-of-a-simple-device-enabling-percutaneous-flow-regulation-for-a-small-vascular-graft-for-a-blalock-taussig-shunt-capable-of-flow-regulation-complete-translation-of-a-review-article-originally-published-in-pediatric-cardiology-and-cardiac-surgery
#9
Yoshikazu Motohashi, Ryo Shimada, Tomoyasu Sasaki, Takahiro Katsumata, Kazunori Dan, Yasuhiro Tsutsui, Shintaro Nemoto
OBJECTIVES: The Blalock-Taussig shunt (BTS) operation is a cornerstone as initial palliative surgery for congenital heart disease with severely reduced pulmonary blood flow (PBF). The ideal PBF provided by BTS is crucial for an uneventful postoperative course, since excess PBF results in acute distress of the systemic circulation and insufficient PBF requires another BTS surgery. Therefore, the goal of this study was to develop a simple device to control the shunt graft flow percutaneously using a constrictor balloon connected to a subcutaneous port...
November 9, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29123114/structural-basis-for-ragulator-functioning-as-a-scaffold-in-membrane-anchoring-of-rag-gtpases-and-mtorc1
#10
Tianlong Zhang, Rong Wang, Zhijing Wang, Xiangxiang Wang, Fang Wang, Jianping Ding
Amino acid-dependent activation of the mechanistic target of rapamycin complex 1 (mTORC1) is mediated by Rag GTPases, which are recruited to the lysosome by the Ragulator complex consisting of p18, MP1, p14, HBXIP and C7orf59; however, the molecular mechanism is elusive. Here, we report the crystal structure of Ragulator, in which p18 wraps around the MP1-p14 and C7orf59-HBXIP heterodimers and the interactions of p18 with MP1, C7orf59, and HBXIP are essential for the assembly of Ragulator. There are two binding sites for the Roadblock domains of Rag GTPases: helix α1 of p18 and the two helices side of MP1-p14...
November 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/29117903/histopathological-and-immunohistochemical-analysis-of-the-use-of-collagen-dressing-as-a-reinforcement-of-esophagic-anastomosis-in-a-rat-experimental-model
#11
Rocio Garcia-Perez, Vicente Munitiz, Carlos Manuel Martinez-Caceres, David Ruiz de Angulo, Angeles Ortiz, Luisa F Martinez de Haro, Diana Navas, Pascual Parrilla
INTRODUCTION: One of the most severe complications after esophaguectomy is anastomotic dehiscence. The use of collagen sponges could be an effective way to resolve this complication. Our objective was to perform an experimental model of esophageal anastomosis in rats to study these mechanisms. METHODS: A total of 50 Sprague-Dawley rats were used divided into 2 groups, Tachosil(®) group (n=25) and control group (n=25). After the section of the abdominal esophagus a single-layer esophago-gastric anastomosis was performed reinforced with 1cm of Tachosil(®) wrapping the anastomosis in group 1...
November 5, 2017: Cirugía Española
https://www.readbyqxmd.com/read/29117761/full-driving-soft-robotic-colonoscope-in-compliant-colon-tissue
#12
Kundong Wang, Jiayi Ma, Feng Wang, Zhiwu Wang, Guozheng Yan, Yilu Zhou
Robotic colonoscopy is an efficient examination method for finding malignant tumour in its early stage. This research developed a novel robotic endoscope with 13 mm diameter, 105 mm length and 22.3 g weight. A contact biomechanical model is proposed to increase the locomotion safety and efficiency in the soft tissue. The model shows that the friction difference between the robot and the tissue is a key factor to locomotion capability. A soft, full bellow with excellent compatibility was designed to package the robot body...
November 9, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29116961/it-s-a-wrap
#13
(no author information available yet)
No abstract text is available yet for this article.
November 7, 2017: Nursing Management
https://www.readbyqxmd.com/read/29115657/wrapping-degloved-fingers-with-a-distal-based-radial-forearm-perforator-flap-a-repair-method-for-multiple-digital-degloving-injury
#14
Yusuf Kenan Çoban, Özcan Öcük, Kaan Bekircan
Degloving hand injuries present challenging situations to hand surgeons as they present with difficulties in reconstructive microsurgery, particularly in multiple digital injuries. Time is a limiting factor when multiple degloving finger amputations are present. Thus, we proposed a repair method for multiple degloving finger injuries that involves coverage with a distal-based reverse forearm flap of all injured fingers in a two-stage procedure. Early vigorous physical therapy after pedicle division of the flap at postoperative third week eliminates joint stiffness problems at wrist and metacarpophalangeal joints...
November 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/29113125/single-shot-dense-depth-sensing-with-color-sequence-coded-fringe-pattern
#15
Fu Li, Baoyu Zhang, Guangming Shi, Yi Niu, Ruodai Li, Lili Yang, Xuemei Xie
A single-shot structured light method is widely used to acquire dense and accurate depth maps for dynamic scenes. In this paper, we propose a color sequence coded fringe depth sensing method. To overcome the phase unwrapping problem encountered in phase-based methods, the color-coded sequence information is embedded into the phase information. We adopt the color-encoded De Bruijn sequence to denote the period of the phase information and assign the sequence into two channels of the pattern, while the third channel is used to code the phase information...
November 6, 2017: Sensors
https://www.readbyqxmd.com/read/29111372/transmural-capillary-ingrowth-is-essential-for-confluent-vascular-graft-healing
#16
Timothy Pennel, Deon Bezuidenhout, Josepha Koehne, Neil Davies, Peter Zilla
Spontaneous endothelialization of synthetic vascular grafts may occur via three independent or concurrent modalities: transanastomotic (TA) outgrowth, transmural (TM) ingrowth or fallout (FO) from the blood. The limited TA and FO endothelialization, which occurs in humans, results in poor long-term patency in the small diameter position, where TM ingrowth may offer a clinically relevant alternative. To achieve sequential analysis of each mode of healing, loop grafts comprising anastomotically isolated angiopermissive polyurethane control grafts were abluminally sealed using either ePTFE wraps or solid polyurethane skins and implanted in the rat infrerenal aortic loop model for twelve weeks...
October 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29109511/ash1l-histone-methyltransferase-regulates-the-handoff-between-damage-recognition-factors-in-global-genome-nucleotide-excision-repair
#17
Chiara Balbo Pogliano, Marco Gatti, Peter Rüthemann, Zuzana Garajovà, Lorenza Penengo, Hanspeter Naegeli
Global-genome nucleotide excision repair (GG-NER) prevents ultraviolet (UV) light-induced skin cancer by removing mutagenic cyclobutane pyrimidine dimers (CPDs). These lesions are formed abundantly on DNA wrapped around histone octamers in nucleosomes, but a specialized damage sensor known as DDB2 ensures that they are accessed by the XPC initiator of GG-NER activity. We report that DDB2 promotes CPD excision by recruiting the histone methyltransferase ASH1L, which methylates lysine 4 of histone H3. In turn, methylated H3 facilitates the docking of the XPC complex to nucleosomal histone octamers...
November 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/29107538/hybrid-structure-of-the-raga-c-ragulator-mtorc1-activation-complex
#18
Ming-Yuan Su, Kyle L Morris, Do Jin Kim, Yangxue Fu, Rosalie Lawrence, Goran Stjepanovic, Roberto Zoncu, James H Hurley
The lysosomal membrane is the locus for sensing cellular nutrient levels, which are transduced to mTORC1 via the Rag GTPases and the Ragulator complex. The crystal structure of the five-subunit human Ragulator at 1.4 Å resolution was determined. Lamtor1 wraps around the other four subunits to stabilize the assembly. The Lamtor2:Lamtor3 dimer stacks upon Lamtor4:Lamtor5 to create a platform for Rag binding. Hydrogen-deuterium exchange was used to map the Rag binding site to the outer face of the Lamtor2:Lamtor3 dimer and to the N-terminal intrinsically disordered region of Lamtor1...
October 25, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29107381/circumferential-adipofascial-graft-for-prevention-of-recurrence-of-posttraumatic-radioulnar-synostosis
#19
REVIEW
Michael Wigton, Megan Friend, Zhongyu Li
Radioulnar synostosis can cause substantial loss of function, and surgical treatment can be challenging. Recurrence of the contracture related to scar or reformation of the synostosis is problematic. Several techniques have been described for prevention of recurrence. We present a technique utilizing a free wrap around adipofascial graft for interposition and circumferential coverage of the ulna after resection of the heterotopic bone. We believe this technique has the advantages of technical simplicity, secure interposition, and reliable outcomes...
October 26, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29104926/a-demonstration-of-le-chatelier-s-principle-on-the-nanoscale
#20
Wayne Lin, Catherine J Murphy
Photothermal desorption of molecules from plasmonic nanoparticles is an example of a light-triggered molecular release due to heating of the system. However, this phenomenon ought to work only if the molecule-nanoparticle interaction is exothermic in nature. In this study, we compare protein adsorption behavior onto gold nanoparticles for both endothermic and exothermic complexation reactions, and demonstrate that Le Chatelier's principle can be applied to predict protein adsorption or desorption on nanomaterial surfaces...
October 25, 2017: ACS Central Science
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