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https://www.readbyqxmd.com/read/28056120/clinical-characterization-of-cngb1-related-autosomal-recessive-retinitis-pigmentosa
#1
Sarah Hull, Marcella Attanasio, Gavin Arno, Keren Carss, Anthony G Robson, Dorothy A Thompson, Vincent Plagnol, Michel Michaelides, Graham E Holder, Robert H Henderson, F Lucy Raymond, Anthony T Moore, Andrew R Webster
Importance: There are limited published data on the phenotype of retinitis pigmentosa (RP) related to CNGB1 variants. These data are needed both for prognostic counseling of patients and for understanding potential treatment windows. Objective: To describe the detailed clinical and molecular genetic findings in a series of patients with RP with likely pathogenic variants in CNGB1. Design, Setting, and Participants: In this case series, 10 patients from 9 families underwent full ophthalmologic examination...
January 5, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28046477/we-de-201-03-combined-use-of-192ir-60co-and-169yb-sources-with-the-novel-direction-modulated-brachytherapy-tandem-applicator-for-high-dose-rate-brachytherapy-planning-of-cervical-cancer
#2
H Safigholi, D Han, S Mashouf, A Soliman, A S Meigooni, A Owrangi, W Y Song
PURPOSE: To evaluate the improvement in plan quality when various combinations of 192Ir, 60Co, and 169Yb sources are used in combination with a novel direction modulated brachytherapy (DMBT) tandem applicator for high dose rate brachytherapy of cervical cancer. METHODS: The proposed DMBT tandem applicator is designed for image-guided adaptive brachytherapy (IGABT), especially MRI, of cervical cancer. It has 6 peripheral holes of 1.3-mm width, grooved along a 5.4-mm diameter nonmagnetic tungsten alloy rod of density 18...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045540/characterization-of-pegylated-liposomal-mitomycin-c-lipid-based-prodrug-promitil%C3%A2-by-high-sensitivity-differential-scanning-calorimetry-and-cryogenic-transmission-electron-microscopy
#3
Xiaohui Wei, Yogita Patil, Patricia Ohana, Yasmine Amitay, Hilary Shmeeda, Alberto Gabizon, Yechezkel Barenholz
The effect of a lipidated prodrug of mitomycin C (MLP) on the membrane of a pegylated liposome formulation (PL-MLP), also known as Promitil®, was characterized through high-sensitivity differential scanning calorimetry (DSC), and cryo-TEM. The thermodynamic analysis demonstrated that MLP led to the formation of heterogeneous domains in the membrane plane of PL-MLP. MLP concentrated in prodrug-rich domains, arranged in high-ordered crystal-like structures, as suggested by the sharp and high enthalpy endotherm in the 1st heating scanning...
January 3, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28010044/the-gpsb-files-the-truth-is-out-there
#4
Richard J Lewis
Peptidoglycan (PG), an essential stress-bearing component of the bacterial cell wall, is synthesised by penicillin binding proteins (PBPs). PG synthesis at the cell division septum is necessary for constructing new poles of progeny cells, and cells cannot elongate without inserting new PG in the side-wall. The cell division regulator GpsB appears to co-ordinate PG synthesis at the septum during division and at the side-wall during elongation in rod-shaped and ovococcoid Gram-positive bacteria. How the control over PG synthesis is exerted is unknown...
December 23, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27973793/envisaging-structural-insight-of-a-terminally-protected-proline-dipeptide-by-raman-spectroscopy-and-density-functional-theory-analyses
#5
Supriya Das, Uttam Pal, Moumita Chatterjee, Sumit Kumar Pramanik, Biswadip Banerji, Nakul C Maiti
The proline residue in a protein sequence generates constraints to its secondary structure as the associated torsion angles become a part of the heterocyclic ring. It becomes more significant when two consecutive proline residues link via amide linkage and produce additional configurational constraint to a protein's folding and stability. In the current manuscript we have illustrated conformation preference of a novel dipeptide, (R)-tert-butyl 2-((S)-2-(methoxycarbonyl)pyrrolidine-1-carbonyl)pyrrolidine-1-carboxylate...
December 15, 2016: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/27958468/improving-the-absorption-of-a-plasmonic-absorber-using-a-single-layer-of-graphene-at-telecommunication-wavelengths
#6
Mohammad Sadegh Zare, Najmeh Nozhat, Reza Rashiditabar
In this paper, a plasmonic absorber composed of a single layer of graphene over a metal film and separated by a 5 nm thin silica layer has been proposed. The metal film consists of two L-shaped grooves and a ring groove between the silver rods, and surrounding the silver cylindrical ring is a square of silica. The absorption of the proposed structure without the graphene is 0.85, and it is enhanced to 0.98 with a single layer of graphene in the near-infrared region. This absorption enhancement is because of the light and graphene interaction, which is reinforced by the localized surface plasmon resonance in the grooves...
December 1, 2016: Applied Optics
https://www.readbyqxmd.com/read/27933260/use-of-a-10-22%C3%A2-m-diameter-epb-shield-a-case-study-in-beijing-subway-construction
#7
Xinggao Li, Dajun Yuan, Yuhai Guo, Zhiyong Cai
INTRODUCTION: Beijing subway line 14 includes four stations and approximately 2.8 km of tunnels between the Dongfengbeiqiao and Jingshunlu areas of the city. Due to the surface and underground space limitations of this section, a double-track running tunnel instead of two single-track running tunnels was adopted to connect the two stations. The double-track tunnels were excavated by a 10.22 m diameter earth pressure balance (EPB) shield. It was the first time that an EPB shield more than 10 m in diameter was used in Beijing subway construction...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27924254/genetic-analysis-of-revertants-isolated-from-the-rod-fragile-flif-mutant-of-salmonella
#8
Hitomi Komatsu, Fumio Hayashi, Masahiro Sasa, Koji Shikata, Shigeru Yamaguchi, Keiichi Namba, Kenji Oosawa
FliF is the protein comprising the MS-ring of the bacterial flagellar basal body, which is the base for the assembly of flagellar axial structures. From a fliF mutant that easily releases the rod-hook-filament in viscous environments, more than 400 revertants that recovered their swarming ability in viscous conditions, were isolated. The second-site mutations were determined for approximately 70% of them. There were three regions where the mutations were localized: two in Region I, 112 in Region II, and 71 in Region III including the true reversion...
2016: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/27906978/correction-of-rings-and-rods-regulating-cohesin-entrapment-of-dna-to-generate-intra-and-intermolecular-tethers
#9
Robert V Skibbens
[This corrects the article DOI: 10.1371/journal.pgen.1006337.].
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27872183/roles-of-the-essential-protein-ftsa-in-cell-growth-and-division-in-streptococcus-pneumoniae
#10
Andrea Mura, Daniela Fadda, Amilcar J Perez, Madeline L Danforth, Daniela Musu, Ana Isabel Rico, Marcin Krupka, Dalia Denapaite, Ho-Ching T Tsui, Malcolm E Winkler, Pavel Branny, Miguel Vicente, William Margolin, Orietta Massidda
: Streptococcus pneumoniae is an ovoid-shaped Gram-positive bacterium that grows by carrying out peripheral and septal peptidoglycan (PG) synthesis, analogous to model bacilli such as Escherichia coli and Bacillus subtilis In the model bacilli, FtsZ and FtsA proteins assemble into a ring at midcell and are dedicated to septal PG synthesis, but not peripheral PG synthesis; hence inactivation of FtsZ or FtsA results in long filamentous cells unable to divide. Here we demonstrate that FtsA and FtsZ colocalize at midcell in S...
November 21, 2016: Journal of Bacteriology
https://www.readbyqxmd.com/read/27866940/anterior-pre-tensioned-external-fixator-for-pelvic-fractures-and-dislocations-initial-clinical-series
#11
A Queipo-de-Llano, M Lombardo-Torre, A Leiva-Gea, F B Delgado-Rufino, F Luna-González
In the treatment of unstable pelvic ring fractures, external fixators have the limitation of not adequately stabilizing the injured posterior elements. This article presents a novel and simple technique of temporary external fixation of the pelvic ring, able to produce compression of both the anterior and posterior pelvic elements. A curved flexible carbon-fiber rod is used, pre-tensioned before attachment to supra-acetabular Schanz screws. Although more extensive clinical experience is required, favorable preliminary results in a series of 13 patients with unstable pelvic fracture were encouraging: the aim of closing the posterior and anterior elements of the pelvic ring was achieved in all cases treated with this technique, and 12 patients survived...
December 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27844412/anti-rods-rings-autoantibody-seropositivity-does-not-affect-response-to-telaprevir-treatment-for-chronic-hepatitis-c-infection
#12
S John Calise, Nicola Bizzaro, Thuy Nguyen, Danila Bassetti, Brunetta Porcelli, Paolo Almi, Giuseppina Barberio, Giampaola Pesce, Minoru Satoh, Edward K L Chan
PURPOSE: Autoantibodies to intracellular 'rods and rings' structures (anti-rods/rings or anti-RR) are strongly associated with hepatitis C (HCV) patients treated with interferon-α/ribavirin (IFN/RBV) and are linked with non-responsiveness to IFN/RBV or relapse, especially in Italian patients. This is the first study to determine whether there is any correlation of anti-RR with non-responsiveness to IFN/RBV treatment in patients also treated with telaprevir (TPV), one of several new therapies for chronic HCV recently implemented...
December 2016: Auto- Immunity Highlights
https://www.readbyqxmd.com/read/27825365/a-prospective-case-series-for-a-minimally-invasive-internal-fixation-device-for-anterior-pelvic-ring-fractures
#13
Wayne Hoskins, Andrew Bucknill, James Wong, Edward Britton, Rodney Judson, Kellie Gumm, Roselyn Santos, Rohan Sheehy, Xavier Griffin
BACKGROUND: External fixation is commonly used as a means of definitive fixation of pelvic fractures. Pin site infection is common, with some cases of osteomyelitis and inpatient nursing can be challenging. The aim of this study is to report the outcomes and complications of an alternative minimally invasive technique, known as INFIX, utilising spinal pedicle screws inserted into the supra-acetabular bone and connected by a subcutaneous rod. METHODS: A single-centre prospective case series was performed...
November 8, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27822341/model-acupuncture-point-bone-marrow-derived-stromal-stem-cells-are-moved-by-a-weak-electromagnetic-field
#14
Artem N Emelyanov, Marina V Borisova, Vera V Kiryanova
AIM: To show the existence of a structural formative role of magnetic fields (MFs) with respect to biological objects by using our proposed model of an acupoint. METHODS: We introduced a magnetised 10-100 μT metal rod (needle) into culture dishes with a negatively charged working surface and observed during 24 h how cells were arranged by MFs and by electrical fields (EFs) when attached. Rat and human bone marrow-derived stromal stem cells (rBMSCs and hBMSCs), human nonadherent mononuclear blood cells, NCTCs and A172 cells, and Escherichia coli (E...
October 26, 2016: World Journal of Stem Cells
https://www.readbyqxmd.com/read/27818950/type-three-secretion-system-in-attaching-and-effacing-pathogens
#15
REVIEW
Meztlli O Gaytán, Verónica I Martínez-Santos, Eduardo Soto, Bertha González-Pedrajo
Enteropathogenic Escherichia coli and enterohemorrhagic E. coli are diarrheagenic bacterial human pathogens that cause severe gastroenteritis. These enteric pathotypes, together with the mouse pathogen Citrobacter rodentium, belong to the family of attaching and effacing pathogens that form a distinctive histological lesion in the intestinal epithelium. The virulence of these bacteria depends on a type III secretion system (T3SS), which mediates the translocation of effector proteins from the bacterial cytosol into the infected cells...
2016: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/27803076/mutational-analysis-and-overproduction-effects-of-motx-an-essential-component-for-motor-function-of-na-driven-polar-flagella-of-vibrio
#16
Norihiro Takekawa, Seiji Kojima, Michio Homma
The bacterial flagellar motor is a rotary motor complex composed of various proteins. The motor contains a central rod, multiple ring-like structures and stators. The Na(+)-driven polar flagellar motor of the marine bacterium Vibrio alginolyticus has a specific ring, called the 'T-ring', which consists of two periplasmic proteins, MotX and MotY. The T-ring is essential for assembly of the torque-generating unit, the PomA/PomB stator complex, into the motor. To investigate the role of the T-ring for motor function, we performed random mutagenesis of the motX gene on a plasmid...
October 25, 2016: Journal of Biochemistry
https://www.readbyqxmd.com/read/27798680/loukoumasomes-are-distinct-subcellular-structures-from-rods-and-rings-and-are-structurally-associated-with-map2-and-the-nuclear-envelope-in-retinal-cells
#17
Jake W Noble, Diana V Hunter, Calvin D Roskelley, Edward K L Chan, Julia Mills
"Rods and rings" (RR) and loukoumasomes are similarly shaped, subcellular macromolecular structures with as yet unknown function. RR, so named because of their shape, are formed in response to inhibition in the GTP or CTP synthetic pathways and are highly enriched in the two key enzymes of the nucleotide synthetic pathway. Loukoumasomes also occur as linear and toroidal bodies and were initially inferred to be the same as RR, largely due to their shared shape and size and the fact that it was unclear if they shared the same subcomponents...
2016: PloS One
https://www.readbyqxmd.com/read/27788133/of-rings-and-rods-regulating-cohesin-entrapment-of-dna-to-generate-intra-and-intermolecular-tethers
#18
REVIEW
Robert V Skibbens
The clinical relevance of cohesin in DNA repair, tumorigenesis, and severe birth defects continues to fuel efforts in understanding cohesin structure, regulation, and enzymology. Early models depicting huge cohesin rings that entrap two DNA segments within a single lumen are fading into obscurity based on contradictory findings, but elucidating cohesin structure amid a myriad of functions remains challenging. Due in large part to integrated uses of a wide range of methodologies, recent advances are beginning to cast light into the depths that previously cloaked cohesin structure...
October 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27755822/%C3%AF-extended-star-shaped-polycyclic-aromatic-hydrocarbons-based-on-fused-truxenes-synthesis-self-assembly-and-facilely-tunable-emission-properties
#19
Cheng Cheng, Yi Jiang, Cheng-Fang Liu, Jian-Dong Zhang, Wen-Yong Lai, Wei Huang
A new set of star-shaped polycyclic aromatic hydrocarbons (PAHs) based on naphthalene-fused truxenes, TrNaCn (n=1-4), were synthesized and characterized. The synthesis involved a microwave-assisted six-fold Suzuki coupling reaction, followed by oxidative cyclodehydrogenation. Multiple dehydrocyclization products could be effectively isolated in a single reaction, thus suggesting that the oxidative cyclodehydrogenation reaction involved a stepwise ring-closing process. The thermal, optical, and electrochemical properties and the self-assembly behavior of the resulting oxidized samples were investigated to understand the impact of the ring-fusing process on the properties of the star-shaped PAHs...
December 19, 2016: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/27753486/aggregation-dispersion-transition-for-nanoparticles-in-semiflexible-ring-polymer-nanocomposite-melts
#20
Zhenyu Deng, Yangwei Jiang, Linli He, Linxi Zhang
By employing molecular dynamics simulations, we explored the conformation transition of nanoparticles (NPs) in semiflexible ring polymer nanocomposite melts. A novel aggregation-dispersion transition for NPs in ring polymer nanocomposites occurs when the bending energy of ring chains increases. The conformations of flexible ring chains near NPs are radial distribution, and the entropic depletion interactions between a pair of NPs in flexible ring polymer nanocomposite melts are attractive, however, the rod-like ring chains wrap around the NPs and the entropic depletion interactions between NPs in rod-like ring polymer melts are repulsive...
November 10, 2016: Journal of Physical Chemistry. B
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