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https://www.readbyqxmd.com/read/28445949/lmp1-slamf1high-cells-are-associated-with-drug-resistance-in-epstein-barr-virus-positive-farage-cells
#1
Heejei Yoon, Young Hyeh Ko
How Epstein-Barr virus (EBV) affects the clinical outcome of EBV-positive diffuse large B-cell lymphoma (DLBCL) remains largely unknown. The viral oncogene LMP1 is at the crux of tumorigenesis and cell survival. Therefore, we examined the association between LMP1high cells drug resistance. We first assessed SLAMF1 as a surrogate marker for LMP1high cells. LMP1 and its target gene CCL22 were highly expressed in SLAMF1high Farage cells. These cells survived longer following treatment with a combination of cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP)...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445788/an-emerging-role-for-the-ribosome-as-a-nexus-for-post-translational-modifications
#2
REVIEW
Deniz Simsek, Maria Barna
The ribosome is one of life's most ancient molecular machines that has historically been viewed as a backstage participant in gene regulation, translating the genetic code across all kingdoms of life in a rote-like fashion. However, recent studies suggest that intrinsic components of the ribosome can be regulated and diversified as a means to intricately control the expression of the cellular proteome. In this review, we discuss advances in the characterization of ribosome post-translational modifications (PTMs) from past to present...
April 22, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28445761/live-cell-super-resolution-reveals-f-actin-and-plasma-membrane-dynamics-at-the-t-cell-synapse
#3
George W Ashdown, Garth L Burn, David J Williamson, Elvis Pandžić, Ruby Peters, Michael Holden, Helge Ewers, Lin Shao, Paul W Wiseman, Dylan M Owen
The cortical actin cytoskeleton has been shown to be critical for the reorganization and heterogeneity of plasma membrane components of many cells, including T cells. Building on previous studies at the T cell immunological synapse, we quantitatively assess the structure and dynamics of this meshwork using live-cell superresolution fluorescence microscopy and spatio-temporal image correlation spectroscopy. We show for the first time, to our knowledge, that not only does the dense actin cortex flow in a retrograde fashion toward the synapse center, but the plasma membrane itself shows similar behavior...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445757/action-of-antimicrobial-peptides-on-bacterial-and-lipid-membranes-a-direct-comparison
#4
Joseph E Faust, Pei-Yin Yang, Huey W Huang
The bacterial membrane represents an attractive target for the design of new antibiotics to combat widespread bacterial resistance. Understanding how antimicrobial peptides (AMPs) and other membrane-active agents attack membranes could facilitate the design of new, effective antimicrobials. Despite intense study of AMPs on model membranes, we do not know how well the mechanism of attack translates to real biological membranes. To that end, we have characterized the attack of AMPs on Escherichia coli cytoplasmic membranes and directly compared this action to model membranes...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445747/physical-and-functional-characterization-of-a-viral-genome-maturation-complex
#5
Teng-Chieh Yang, David Ortiz, Qin Yang, Rolando W De Angelis, Saurarshi J Sanyal, Carlos E Catalano
Genome packaging is strongly conserved in the complex double-stranded DNA viruses, including the herpesviruses and many bacteriophages. In these cases, viral DNA is packaged into a procapsid shell by a terminase enzyme. The packaging substrate is typically a concatemer composed of multiple genomes linked in a head-to-tail fashion, and terminase enzymes perform two essential functions: 1) excision of a unit length genome from the concatemer (genome maturation) and 2) translocation of the duplex into a procapsid (genome packaging)...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445460/polyglutamine-tracts-regulate-beclin-1-dependent-autophagy
#6
Avraham Ashkenazi, Carla F Bento, Thomas Ricketts, Mariella Vicinanza, Farah Siddiqi, Mariana Pavel, Ferdinando Squitieri, Maarten C Hardenberg, Sara Imarisio, Fiona M Menzies, David C Rubinsztein
Nine neurodegenerative diseases are caused by expanded polyglutamine (polyQ) tracts in different proteins, such as huntingtin in Huntington's disease and ataxin 3 in spinocerebellar ataxia type 3 (SCA3). Age at onset of disease decreases with increasing polyglutamine length in these proteins and the normal length also varies. PolyQ expansions drive pathogenesis in these diseases, as isolated polyQ tracts are toxic, and an N-terminal huntingtin fragment comprising exon 1, which occurs in vivo as a result of alternative splicing, causes toxicity...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28445106/tension-free-inlay-repair-of-large-hiatal-hernias-using-dual-sided-composite-ptfe-eptfe-meshes-in-laparoscopic-surgery-for-gastroesophageal-reflux-disease
#7
Alexander M Prusa, Ivan Kristo, Erwin Rieder, Claudia Ringhofer, Reza Asari, Johannes Miholic, Sebastian F Schoppmann
BACKGROUND: Patients with gastroesophageal reflux disease (GERD) also frequently suffer from concomitant hiatal hernia. It has been described that a preoperative hiatal hernia of ≥3 cm is associated with a more than threefold relative risk for reflux symptom recurrence after fundoplication without mesh reinforcement. In this report, we describe our experience with the implantation of dual-sided composite PTFE/ePTFE meshes in a tension-free fashion during laparoscopic antireflux surgery (LARS)...
April 26, 2017: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28445033/c-h-functionalization-of-azines
#8
Kei Murakami, Shuya Yamada, Takeshi Kaneda, Kenichiro Itami
Azines, which are six-membered aromatic compounds containing one or more nitrogen atoms, serve as ubiquitous structural cores of aromatic species with important applications in biological and materials sciences. Among a variety of synthetic approaches toward azines, C-H functionalization represents the most rapid and atom-economical transformation, and it is advantageous for the late-stage functionalization of azine-containing functional molecules. Since azines have several C-H bonds with different reactivities, the development of new reactions that allow for the functionalization of azines in a regioselective fashion has comprised a central issue...
April 26, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28444998/large-population-cell-characterization-using-quantitative-phase-cytometer
#9
Di Jin, Yongjin Sung, Niyom Lue, Yang-Hyo Kim, Peter T C So, Zahid Yaqoob
A major challenge in cellular analysis is the phenotypic characterization of large cell populations within a short period of time. Among various parameters for cell characterization, the cell dry mass is often used to describe cell size but is difficult to be measured directly with traditional techniques. Here, we propose an interferometric approach based on line-focused beam illumination for high-content precision dry mass measurements of adherent cells in a non-invasive fashion-we call it quantitative phase cytometry (QPC)...
April 26, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28444826/indium-iii-catalyzed-aza-conia-ene-reaction-for-the-synthesis-of-indolizines
#10
Karl Anker Jørgensen, Marta Meazza, Lars Astrup Leth, Jeremy David Erickson
A novel indium(III)-catalyzed reaction for the synthesis of a series of indolizine scaffolds has been developed. This methodology is highly efficient, allowing a low catalyst loading of 2 mol% (down to 0.5 mol%) and rendering the products in high yields through a 5-exo-dig aza-Conia-ene reaction. Further-more, the possibility of incorporating an electrophile to the generated pyrrolidine-ring in a one-pot synergistic fashion is demonstrated. Finally, based on experimental observations, a mechanism proposal is outlined...
April 26, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28444778/development-and-implementation-of-an-84-channel-matrix-gradient-coil
#11
Sebastian Littin, Feng Jia, Kelvin J Layton, Stefan Kroboth, Huijun Yu, Jürgen Hennig, Maxim Zaitsev
PURPOSE: Design, implement, integrate, and characterize a customized coil system that allows for generating spatial encoding magnetic fields (SEMs) in a highly-flexible fashion. METHODS: A gradient coil with a high number of individual elements was designed. Dimensions of the coil were chosen to mimic a whole-body gradient system, scaled down to a head insert. Mechanical shape and wire layout of each element were optimized to increase the local gradient strength while minimizing eddy current effects and simultaneously considering manufacturing constraints...
April 25, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28444541/reverse-shoulder-arthroplasty-for-massive-irreparable-rotator-cuff-tears-and-cuff-tear-arthropathy-a-systematic-review
#12
REVIEW
S Petrillo, U G Longo, R Papalia, V Denaro
PURPOSE: To report the outcomes and complications of reverse shoulder arthroplasty (RSA) in massive irreparable rotator cuff tears (MIRCT) and cuff tear arthropathy (CTA). METHODS: A systematic review of the literature contained in Medline, Cochrane, EMBASE, Google Scholar and Ovid databases was conducted on May 1, 2016, according to PRISMA guidelines. The key words "reverse total shoulder arthroplasty" or "reverse total shoulder prostheses" with "rotator cuff tears"; "failed rotator cuff surgery"; "massive rotator cuff tears"; "irreparable rotator cuff tears"; "cuff tear arthropathy"; "outcomes"; "complications" were matched...
April 25, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28444399/development-of-a-multipurpose-scaffold-for-the-display-of-peptide-loops
#13
Maxim Rossmann, Sandra J Greive, Tommaso Moschetti, Michael Dinan, Marko Hyvönen
Protein-protein interactions (PPIs) determine a wide range of biological processes and analysis of these dynamic networks is increasingly becoming a mandatory tool for studying protein function. Using the globular ATPase domain of recombinase RadA as a scaffold, we have developed a peptide display system (RAD display), which allows for the presentation of target peptides, protein domains or full-length proteins and their rapid recombinant production in bacteria. The design of the RAD display system includes differently tagged versions of the scaffold, which allows for flexibility in the protein purification method, and chemical coupling for small molecule labeling or surface immobilization...
April 24, 2017: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/28443910/spin-state-variability-in-fe-2-complexes-of-substituted-2-pyridin-2-yl-1-10-phenanthroline-ligands-as-versatile-terpyridine-analogues
#14
Holm Petzold, Paul Djomgoue, Gerald Hörner, Silvio Heider, Charles Lochenie, Birgit Weber, Tobias Rüffer, Dieter Schaarschmidt
Fe(2+) spin crossover complexes [Fe(L)2](2+) (L = 2-(6-R(1)-pyridin-2-yl)-1,10-phenanthroline with R(1) = H, methoxy, bromo, -(1H-pyrazol-1-yl) or L = 2-(3-methoxy-pyridin-2-yl)-1,10-phenanthroline) were prepared. These air stable and durable complexes show SCO behaviour with very different transition temperatures T1/2 ranging from 130 K to 600 K depending on the substitution pattern. The use of (1)H NMR spectroscopy to elucidate the thermodynamics and kinetics of SCO in a solution of this series is described in detail...
April 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28443039/primary-emotional-systems-and-personality-an-evolutionary-perspective
#15
Christian Montag, Jaak Panksepp
The present article highlights important concepts of personality including stability issues from the perspective of situational demands and stability over the life-course. Following this more introductory section, we argue why individual differences in primary emotional systems may represent the phylogenetically oldest parts of human personality. Our argumentation leads to the need to increasingly consider individual differences in the raw affects/emotions of people to understand human personality in a bottom-up fashion, which can be coordinated with top-down perspectives...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28442953/role-of-flupirtine-in-reducing-preoperative-anxiety-of-patients-undergoing-craniotomy-procedure
#16
Ghanshyam Yadav, Gaurav Jain, Malkhan Singh
BACKGROUND: Kv7 neuronal channels are recognized as a potential drug target for anxiolytic effects. We hypothesize that flupirtine as a potassium channel opener would effectively reduce the preoperative anxiety of patients undergoing craniotomy procedure. METHODS: In prospective-double-blinded fashion, 124 counseled patients were randomized to receive 5 sequential doses of capsule flupirtine 100 mg (F Group) or physically similar starch capsules (C Group), at 12 h intervals during preoperative hospitalization...
April 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28442883/a-comment-on-frontal-fibrosing-alopecia-axel-munthe-s-syndrome
#17
Ralph M Trüeb
Frontal fibrosing alopecia (FFA) represents a peculiar condition with a quasi-symmetrical, marginal alopecia along the frontal and temporal hairline with scarring. Steven Kossard is credited with the original description of the condition in 1994. Since its first description, FFA has become increasingly common while its etiology has remained obscure. While FFA has been related to lichen planopilaris, in fact, the pattern of clinical disease presentation might be more specific for the condition than the underlying inflammatory autoimmune reaction...
October 2016: International Journal of Trichology
https://www.readbyqxmd.com/read/28442739/mixing-of-quantum-states-a-new-route-to-creating-optical-activity
#18
Anvar S Baimuratov, Nikita V Tepliakov, Yurii K Gun'ko, Alexander V Baranov, Anatoly V Fedorov, Ivan D Rukhlenko
The ability to induce optical activity in nanoparticles and dynamically control its strength is of great practical importance due to potential applications in various areas, including biochemistry, toxicology, and pharmaceutical science. Here we propose a new method of creating optical activity in originally achiral quantum nanostructures based on the mixing of their energy states of different parities. The mixing can be achieved by selective excitation of specific states or via perturbing all the states in a controllable fashion...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28442713/a-self-consistent-spin-diffusion-model-for-micromagnetics
#19
Claas Abert, Michele Ruggeri, Florian Bruckner, Christoph Vogler, Aurelien Manchon, Dirk Praetorius, Dieter Suess
We propose a three-dimensional micromagnetic model that dynamically solves the Landau-Lifshitz-Gilbert equation coupled to the full spin-diffusion equation. In contrast to previous methods, we solve for the magnetization dynamics and the electric potential in a self-consistent fashion. This treatment allows for an accurate description of magnetization dependent resistance changes. Moreover, the presented algorithm describes both spin accumulation due to smooth magnetization transitions and due to material interfaces as in multilayer structures...
December 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28441388/a-population-based-approach-for-implementing-change-from-opt-out-to-opt-in-research-permissions
#20
Elizabeth A Marshall, Jim C Oates, Azza Shoaibi, Jihad S Obeid, Melissa L Habrat, Robert W Warren, Kathleen T Brady, Leslie A Lenert
Due to recently proposed changes in the Common Rule regarding the collection of research preferences, there is an increased need for efficient methods to document opt-in research preferences at a population level. Previously, our institution developed an opt-out paper-based workflow that could not be utilized for research in a scalable fashion. This project was designed to demonstrate the feasibility of implementing an electronic health record (EHR)-based active opt-in research preferences program. The first phase of implementation required creating and disseminating a patient questionnaire through the EHR portal to populate discreet fields within the EHR indicating patients' preferences for future research study contact (contact) and their willingness to allow anonymised use of excess tissue and fluid specimens (biobank)...
2017: PloS One
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