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https://www.readbyqxmd.com/read/29302496/selective-pectoralis-major-muscle-denervation-in-breast-reconstruction-a-technical-modification-for-more-effective-and-cosmetic-results
#1
Marco Bernini, Donato Casella, Carlo Mariotti
The use of pectoralis major muscle (PMM) in breast reconstruction has been a mainstay for decades. In recent years, although, a novel approach, the so-called subcutaneous or pre-pectoral breast reconstruction, has been introduced advocating the advantages of sparing the pectoralis muscle. Such advantages include more natural implant ptosis and appearance, significant reduction of capsular contracture and also avoidance of implant animation and animation deformities. These are all drawbacks that the use of muscles in implant coverage inevitably involves overtime...
December 2017: Gland Surgery
https://www.readbyqxmd.com/read/29300972/a-recurrent-de-novo-missense-mutation-in-ubtf-causes-developmental-neuroregression
#2
Camilo Toro, Roderick T Hori, May Christine V Malicdan, Cynthia J Tifft, Amy Goldstein, William A Gahl, David R Adams, Fauni Harper, Lynne A Wolfe, Jianfeng Xiao, Mohammad M Khan, Jun Tian, Kevin A Hope, Lawrence T Reiter, Michel G Tremblay, Thomas Moss, Alexis L Franks, Chris Balak, Mark S LeDoux
UBTF (upstream binding transcription factor) exists as two isoforms; UBTF1 regulates rRNA transcription by RNA polymerase 1, whereas UBTF2 regulates mRNA transcription by RNA polymerase 2. Herein, we describe 4 patients with very similar patterns of neuroregression due to recurrent de novo mutations in UBTF (GRCh37/hg19, NC_000017.10:g.42290219C>T, NM_014233.3:c.628G>A) resulting in the same amino acid change in both UBTF1 and UBTF2 (p.Glu210Lys [p.E210K]). Disease onset in our cohort was at 2.5 to 3 yrs and characterized by slow progression of global motor, cognitive and behavioral dysfunction...
January 2, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29300056/intermolecular-configurations-dominated-by-quadrupole-quadrupole-electrostatic-interactions-explicit-correlation-treatment-of-the-five-dimensional-potential-energy-surface-and-infrared-spectra-for-the-co-n2-complex
#3
Jing-Min Liu, Yu Zhai, Xiao-Long Zhang, Hui Li
A thorough understanding of the intermolecular configurations of van der Waals complexes is a great challenge due to their weak interactions, floppiness and anharmonic nature. Although high-resolution microwave or infrared spectroscopy provides one of the most direct and precise pieces of experimental evidence, the origin and key role in determining such intermolecular configurations of a van der Waals system strongly depend on its highly accurate potential energy surface (PES) and a detailed analysis of its ro-vibrational wavefunctions...
January 4, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29291138/shuffling-active-site-substate-populations-affects-catalytic-activity-the-case-of-glucose-oxidase
#4
Dušan Petrović, David Frank, Shina Caroline Lynn Kamerlin, Kurt Hoffmann, Birgit Strodel
Glucose oxidase has wide applications in the pharmaceutical, chemical, and food industries. Many recent studies have enhanced key properties of this enzyme using directed evolution, yet without being able to reveal why these mutations are actually beneficial. This work presents a synergistic combination of experimental and computational methods, indicating how mutations, even when distant from the active site, positively affect glucose oxidase catalysis. We have determined the crystal structures of glucose oxidase mutants containing molecular oxygen in the active site...
September 1, 2017: ACS Catalysis
https://www.readbyqxmd.com/read/29192817/can-a-floppy-upper-airway-lead-to-stiff-lungs
#5
Rachel K Putman, Robert L Owens
No abstract text is available yet for this article.
December 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29183092/-methamphetamine-consumption-during-pregnancy-and-its-effects-on-neonates
#6
Alina Pflügner, Ulrich Thome, Matthias K Bernhard, Mandy Vogel, Annett Bläser, Petra Nickel, Wieland Kiess
Objective Methamphetamine (MA) has become one of the most commonly used illegal drugs during pregnancy. We sought to determine how MA abuse modifies pregnancy outcomes and the health of the newborn infants. Patients 102 newborns from mothers with antenatal MA consumption were admitted to the University Hospital Leipzig from 2004-2015. Methods The effects of MA abuse on pregnancy outcomes and neonates were researched in a retrospective controlled study. We analysed the date of pregnancy detection, number of antenatal preventive examinations, body measurements of the neonates, duration of hospitalization, rate of preterm infants, congenital malformations and symptoms of neonatal abstinence syndrome...
November 28, 2017: Klinische Pädiatrie
https://www.readbyqxmd.com/read/29168365/evaluation-of-choroidal-thickness-measurements-in-pediatric-obstructive-sleep-apnea-syndrome-patients
#7
Cem Bayraktar, Ali Şimşek
Bayraktar C, Şimşek A. Evaluation of choroidal thickness measurements in pediatric obstructive sleep apnea syndrome patients. Turk J Pediatr 2017; 59: 62-67. Choroidal vascular impairment and obstructive sleep apnea syndrome (OSAS) related disorders have been shown in adults, but there have been no investigations with regard to the choroidal thickness measurements in children with OSAS. Our aim was to investigate this relationship in the early childhood period, which correlates with OSAS peak incidence due to adenotonsillar enlargement...
2017: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/29167283/rotostep-a-chromosome-dynamics-simulator-reveals-mechanisms-of-loop-extrusion
#8
Josh Lawrimore, Brandon Friedman, Ayush Doshi, Kerry Bloom
ChromoShake is a three-dimensional simulator designed to explore the range of configurational states a chromosome can adopt based on thermodynamic fluctuations of the polymer chain. Here, we refine ChromoShake to generate dynamic simulations of a DNA-based motor protein such as condensin walking along the chromatin substrate. We model walking as a rotation of DNA-binding heat-repeat proteins around one another. The simulation is applied to several configurations of DNA to reveal the consequences of mechanical stepping on taut chromatin under tension versus loop extrusion on single-tethered, floppy chromatin substrates...
November 22, 2017: Cold Spring Harbor Symposia on Quantitative Biology
https://www.readbyqxmd.com/read/29166048/symmetry-breaking-and-spectral-considerations-of-the-surprisingly-floppy-c-c3h-radical-and-the-related-dipole-bound-excited-state-of-c-c3h
#9
Matthew K Bassett, Ryan C Fortenberry
The C3H radical is believed to be prevalent throughout the interstellar medium and may be involved in the formation of polycyclic aromatic hydrocarbons. C3H exists as both a linear and a cyclic isomer. The C2v cyclopropenylidenyl radical isomer was detected in the dark molecular cloud TMC-1, and the linear propenylidenyl radical isomer has been observed in various dark molecular clouds. Even though the c-C3H radical has been classified rotationally, the vibrational frequencies of this seemingly important interstellar molecule have never been directly observed...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29135004/floppy-molecules-as-candidates-for-achieving-optoelectronic-molecular-devices-without-skeletal-rearrangement-or-bond-breaking
#10
Ioan Bâldea
Molecular species investigated as possible candidates for molecular photoswitches often toggle between two (low and high conductance) conformations implying skeletal rearrangement, bond breaking, and substantial changes of molecular length. All these represent shortcomings that impede the switching speed and straightforward incorporation in nanodevices. In the present paper we propose a mechanism wherein the photoinduced switching is from a nonplanar conformation to a planar conformation, and involves neither skeletal rearrangement nor bond breaking or significant molecular length changes...
November 22, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29058918/spatial-factors-for-triplet-fusion-reaction-of-singlet-oxygen-photosensitization
#11
Shuming Bai, Mario Barbatti
First-principles quantum-chemical description of photosensitized singlet oxygen generation kinetics is challenging because of the intrinsic complexity of the underlying triplet fusion process in a floppy molecular complex with open-shell character. With a quantum-chemical kinetic model specifically tailored to deal with this problem, the reaction rates are investigated as a function of intermolecular incidence direction, orientation, and distance between O2 and the photosensitizer. The adopted photosensitizer, 6-azo-2-thiothymine, combines practical interest and prototypical variability...
October 25, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29045137/efficient-geometry-minimization-and-transition-structure-optimization-using-interpolated-potential-energy-surfaces-and-iteratively-updated-hessians
#12
Jingjing Zheng, Michael J Frisch
An efficient geometry optimization algorithm based on interpolated potential energy surfaces with iteratively updated Hessians is presented in this work. At each step of geometry optimization (including both minimization and transition structure search), an interpolated potential energy surface is properly constructed by using the previously calculated information (energies, gradients, and Hessians/updated Hessians), and Hessians of the two latest geometries are updated in an iterative manner. The optimized minimum or transition structure on the interpolated surface is used for the starting geometry of the next geometry optimization step...
October 18, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29038802/viscous-forces-and-bulk-viscoelasticity-near-jamming
#13
Karsten Baumgarten, Brian P Tighe
When weakly jammed packings of soft, viscous, non-Brownian spheres are probed mechanically, they respond with a complex admixture of elastic and viscous effects. While many of these effects are understood for specific, approximate models of the particles' interactions, there are a number of proposed force laws in the literature, especially for viscous interactions. We numerically measure the complex shear modulus G* of jammed packings for various viscous force laws that damp relative velocities between pairs of contacting particles or between a particle and the continuous fluid phase...
November 22, 2017: Soft Matter
https://www.readbyqxmd.com/read/28956098/how-to-size-asds-for-percutaneous-closure
#14
Isabelle Boon, Katrien Vertongen, Bernard P Paelinck, Laurent Demulier, An Van Berendoncks, Catherine De Maeyer, Fabienne Marchau, Joseph Panzer, Kristof Vandekerckhove, Daniel De Wolf
Percutaneous closure is the treatment of choice for secundum-type atrial septal defects (ASD). Balloon sizing (BS) has been the method of choice for deciding on device size. Improved 2D- and 3D-transesophageal echocardiographic (TEE) imaging challenged the necessity of BS. Balloon sizing was performed with two additional techniques to measure the stretched dimension of the ASD. The 1st method uses a stiff guide wire which stretches the ASD and 2D TEE. The second technique uses 3D TEE. Two hundred and thirty-six patients with minimum 1-year follow-up were enrolled...
September 27, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28942764/ocular-manifestations-of-obstructive-sleep-apnea
#15
Matthew Santos, R Jeffrey Hofmann
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) incurs a host of systemic side effects. The eyes are particularly susceptible to both mechanical and vascular sequelae of the disease. This paper outlines the ocular manifestations of sleep apnea. The authors hope to increase awareness of the ocular complications of this common disorder and increase communication and co-management between eye-care providers and sleep specialists alike. METHODS: Data were collected from PubMed and the Brown University Library Collection...
November 15, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28937828/the-effects-of-systemic-alfuzosin-and-tamsulosin-hydrochloride-on-choroidal-thickness-and-pupil-diameter-sizes-in-cases-with-benign-prostatic-hyperplasia
#16
Mustafa Dogan, Bunyamin Kutluksaman, Ibrahim Keles, Mustafa Karalar, Ahmet Omer Halat
PURPOSE: To compare the effects of alfuzosin hydrochloride and tamsulosin hydrochloride on choroidal thickness (CT) and pupil diameter (PD) sizes in patients with benign prostatic hyperplasia. SUBJECTS AND METHODS: Sixty-three men patients with newly diagnosis of benign prostatic hyperplasia were randomly assigned to either alfuzosin hydrochloride or to tamsulosin hydrochloride groups in this prospective, randomized, parallel-group clinical trial. Enhanced depth imaging spectral-domain optical coherence tomography, pupillography were obtained at baseline, 1st and 3rd month, and choroidal thicknesses and pupil diameter sizes were compared between the two groups...
September 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28929061/drug-induced-sleep-endoscopy-as-a-selection-tool-for-surgical-management-of-obstructive-sleep-apnoea-syndrome-our-personal-experience
#17
M B Bharathi, J Rajendra Prasad, K Satish
The role of Drug-induced sleep endoscopy as a selection tool for surgical management of obstructive sleep apnoea syndrome. SOURCE OF DATA: Polysomnography proved OSA patients, who are planned for surgery in dept. of ENT AND HEAD& NECK, JSS Hospital, Mysore. STUDY DESIGN: A prospective clinical study. METHOD: 30 Polysomnography proved OSA patients, age between 20 and 60 years have been selected for Drug Induced Sleep Endoscopy (DISE) after taking informed consent for proposed surgery...
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28910892/-study-on-pharyngeal-wall-floppiness-of-patients-with-obstructive-sleep-apnea-hypopnea-syndrome-attributable-to-non-structural-factors
#18
Z Q Lin, K L Jiang, L Zhao, S N Li, S Shao, W Qian, Z Z Tao
Objective: Acoustic pharyngealmetry technology is utilized to evaluate the change and clinical significance of obstructive sleep apnea-hypopnea syndrome (OSAHS) patients caused by non-upper airway structural factor and normal individuals' PWF(pharyngeal wall floppiness). Methods: Acoustic pharyngealmetry instrument of Ecconvision was utilized to examine 102 OSAHS patients and 50 normal individuals, separately recorded their volume of pharyngeal cavity in sit or supine position, calculated PWF in sit or supine position, and SPSS 12...
September 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28903962/an-evaluation-of-intracameral-mydriasis-for-routine-cataract-surgery
#19
Christopher B Schulz, Srini V Goverdhan, Roger C Humphry
BACKGROUND: Intracameral Mydrane might facilitate a more streamlined cataract service and improve the patient experience. There is limited 'real-world' evidence of its use in a UK setting. METHODS: As part of a local evaluation of cataract surgery using intracameral Mydrane (group 2; n=60), data were collected on intraoperative pupil size and postoperative visual acuity (VA), as well as the rate of mechanical pupil dilation, intraoperative floppy iris syndrome (IFIS) and complications...
September 13, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28901745/terminating-dna-tile-assembly-with-nanostructured-caps
#20
Deepak K Agrawal, Ruoyu Jiang, Seth Reinhart, Abdul M Mohammed, Tyler D Jorgenson, Rebecca Schulman
Precise control over the nucleation, growth, and termination of self-assembly processes is a fundamental tool for controlling product yield and assembly dynamics. Mechanisms for altering these processes programmatically could allow the use of simple components to self-assemble complex final products or to design processes allowing for dynamic assembly or reconfiguration. Here we use DNA tile self-assembly to develop general design principles for building complexes that can bind to a growing biomolecular assembly and terminate its growth by systematically characterizing how different DNA origami nanostructures interact with the growing ends of DNA tile nanotubes...
October 24, 2017: ACS Nano
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