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State of art

Katharina Osterhage, Patrick Czorlich, Till R Burkhardt, Roman Rotermund, Ulrich Grzyska, Jörg Flitsch
OBJECTIVE: To identify symptomatic vasospasms as a rare complication after pituitary surgery with emphasis on management and outcome. DESIGN AND METHODS: In a retrospective design, 1997 patient charts undergoing microscopic transsphenoidal surgery from 2008 till 2016 were retrospectively analyzed regarding postoperative vasospastic events, its' clinical management, and neurological outcome. RESULTS: Four patients (0.2%) were identified, who developed neurological deficits in the postoperative phase caused by proven vasospasms due to subarachnoid hemorrhage (SAH)...
October 15, 2017: World Neurosurgery
Xing Chen, Di Xie, Qi Zhao, Zhu-Hong You
Plenty of microRNAs (miRNAs) were discovered at a rapid pace in plants, green algae, viruses and animals. As one of the most important components in the cell, miRNAs play a growing important role in various essential and important biological processes. For the recent few decades, amounts of experimental methods and computational models have been designed and implemented to identify novel miRNA-disease associations. In this review, the functions of miRNAs, miRNA-target interactions, miRNA-disease associations and some important publicly available miRNA-related databases were discussed in detail...
October 17, 2017: Briefings in Bioinformatics
Michael Molnar, Ehsan Haghshenas, Lucian Ilie
Summary: De novo genome assembly of next-generation sequencing data is a fundamental problem in bioinformatics. There are many programs that assemble small genomes, but very few can assemble whole human genomes. We present a new algorithm for parallel overlap graph construction that is capable of assembling human genomes and improves upon the current state-of-the-art in genome assembly. Availability: SAGE2 is written in C ++ and OpenMP and is freely available at github...
October 13, 2017: Bioinformatics
Xianjun Shen, Li Yi, Xingpeng Jiang, Tingting He, Jincai Yang, Wei Xie, Po Hu, Xiaohua Hu
How to identify protein complex is an important and challenging task in proteomics. It would make great contribution to our knowledge of molecular mechanism in cell life activities. However, the inherent organization and dynamic characteristic of cell system have rarely been incorporated into the existing algorithms for detecting protein complexes because of the limitation of protein-protein interaction (PPI) data produced by high throughput techniques. The availability of time course gene expression profile enables us to uncover the dynamics of molecular networks and improve the detection of protein complexes...
2017: PloS One
Timur Aksoy, Ziga Spiclin, Franjo Pernus, Gozde Unal
Registration of 3D pre-interventional to 2D intra-interventional medical images has an increasingly important role in surgical planning, navigation and treatment, because it enables the physician to co-locate depth information given by pre-interventional 3D images with the live information in intra-interventional 2D images such as X-ray. Most tasks during image-guided interventions are carried out under a monoplane X-ray, which is a highly ill-posed problem for state-of-the-art 3D to 2D registration methods...
October 18, 2017: Physics in Medicine and Biology
Lena Griebel, Heidi Enwald, Heidi Gilstad, Anna-Lena Pohl, Julia Moreland, Martin Sedlmayr
The concept of electronic health (eHealth) literacy evolved from the social and information sciences and describes competencies necessary to use electronic health services. As it is a rather new topic, and as there is no current overview of the state of the art in research, it is not possible to identify research gaps. Therefore, the objective of this viewpoint article is to increase knowledge on the current state of the art of research in eHealth literacy and to identify gaps in scientific research which should be focused on by the research community in the future...
October 18, 2017: Informatics for Health & Social Care
Veronica De Rosa, Antonio La Cava, Giuseppe Matarese
The prevalence of autoimmune disorders in affluent countries has reached epidemic proportions. Over the past 50 years, a reverse trend between the frequency of infectious diseases and the incidence of autoimmune and allergic diseases led to the so-called 'hygiene hypothesis'. Given the epidemiological evidence and recent experimental data, we propose that this concept should also include metabolic pressure secondary to exposure to excessive daily caloric intake and overnutrition. We discuss how metabolic workload can modulate immunological tolerance and review the molecular mechanisms and the state of the art of the field...
October 18, 2017: Nature Immunology
José Maria De la Rosa, Pedro M Martin-Sanchez, Santiago Sanchez-Cortes, Bernardo Hermosin, Heike Knicker, Cesareo Saiz-Jimenez
Two novel species of the fungal genus Ochroconis, O. lascauxensis and O. anomala have been isolated from the walls of the Lascaux Cave, France. The interest in these fungi and their melanins lies in the formation of black stains on the walls and rock art which threatens the integrity of the paintings. Here we report solid-state cross polarization magic-angle spinning (13)C and (15)N nuclear magnetic resonance (NMR) spectroscopy and surface-enhanced Raman spectroscopy (SERS) of the melanins extracted from the mycelia of O...
October 18, 2017: Scientific Reports
S Bulja, R Kopf, K Nolan, R Lundy, A Tate, T C Hu, M Norooziarab, R Cahill, W Templ
Electro-chromic materials (EC) are a new class of electronically reconfigurable thin films that have the ability to reversibly change optical properties by electric charge insertion/extraction. Since their discovery by Deb, they have been employed in applications related to display technology, such as smart windows and mirrors and active optical filters. In this sense, a variety of studies related to the tuneable optical characteristics of EC materials have recently been reported, however, their microwave tuneable dielectric characteristics have been left somewhat unexplored...
October 18, 2017: Scientific Reports
M C E Galbraith, S Scheit, N V Golubev, G Reitsma, N Zhavoronkov, V Despré, F Lépine, A I Kuleff, M J J Vrakking, O Kornilov, H Köppel, J Mikosch
Observing the crucial first few femtoseconds of photochemical reactions requires tools typically not available in the femtochemistry toolkit. Such dynamics are now within reach with the instruments provided by attosecond science. Here, we apply experimental and theoretical methods to assess the ultrafast nonadiabatic vibronic processes in a prototypical complex system-the excited benzene cation. We use few-femtosecond duration extreme ultraviolet and visible/near-infrared laser pulses to prepare and probe excited cationic states and observe two relaxation timescales of 11 ± 3 fs and 110 ± 20 fs...
October 18, 2017: Nature Communications
Eleonora Ottina, Victor Peperzak, Katia Schoeler, Emma Carrington, Roswitha Sgonc, Marc Pellegrini, Simon Preston, Marco J Herold, Andreas Strasser, Andreas Villunger
The Tet-On/Off system for conditional transgene expression constitutes state-of-the-art technology to study gene function by facilitating inducible expression in a timed and reversible manner. Several studies documented the suitability and versatility of this system to trace lymphocyte fate and to conditionally express oncogenes or silence tumour suppressor genes in vivo. Here, we show that expression of the tetracycline/doxycycline-controlled Tet-transactivator, while tolerated well during development and in immunologically unchallenged animals, impairs the expansion of antigen-stimulated T and B cells and thereby curtails adaptive immune responses in vivo...
October 18, 2017: Nature Communications
Verena Ibl, Jenny Peters, Eva Stöger, Elsa Arcalís
The cereal endosperm is a complex structure comprising distinct cell types, characterized by specialized organelles for the accumulation of storage proteins. Protein trafficking in these cells is complicated by the presence of several different storage organelles including protein bodies (PBs) derived from the endoplasmic reticulum (ER) and dynamic protein storage vacuoles (PSVs). In addition, trafficking may follow a number of different routes depending on developmental stage, showing that the endomembrane system is capable of massive reorganization...
2018: Methods in Molecular Biology
Sascha Lutz, Eloisa Lopez-Calle, Pamela Espindola, Christoph Boehm, Thorsten Brueckner, Juergen Spinke, Moritz Marcinowski, Thomas Keller, Armin Tgetgel, Nicolas Herbert, Thomas Fischer, Erik Beiersdorf
We present a novel fully integrated centrifugal microfluidic platform for highly sensitive immunoassays in point-of-care settings. The platform consists of a disposable cartridge containing structures for assay processing, a porous membrane and all dried reagents required for the analysis. Additionally, a blister containing a washing buffer is connected to a new aliquoting structure enabling the serial aliquoting of washing buffer for repetitive bound-free separation steps. The proof-of-concept for two immunoassays is shown in the cartridge with each requiring only 30 μL of whole blood or plasma as the sample material...
October 18, 2017: Analyst
Liren Qian, Ciprian Tomuleasa, Ioan-Alexandru Florian, Jianliang Shen, Ioan-Stefan Florian, Mihnea Zdrenghea, Delia Dima
Primary central nervous system lymphoma (PCNSL) is a type of highly invasive non-Hodgkin lymphoma. With a growing number of organ transplantation and immunosuppressant therapy, the incidence of PCNSL has been growing rapidly in recent years, which is attributed to the increased incidence of HIV/AIDS, a prominent risk factor for developing PCNSL. The rising rate of PCNSL incidence is the highest among the intracranial tumors. In the past 20 years, dozens of clinical trials related to PCNSL have been registered, but adequate therapeutics are still challenging...
September 2017: Blood Research
Y Anraku, H Kuwahara, Y Fukusato, A Mizoguchi, T Ishii, K Nitta, Y Matsumoto, K Toh, K Miyata, S Uchida, K Nishina, K Osada, K Itaka, N Nishiyama, H Mizusawa, T Yamasoba, T Yokota, K Kataoka
Recently, nanocarriers that transport bioactive substances to a target site in the body have attracted considerable attention and undergone rapid progression in terms of the state of the art. However, few nanocarriers can enter the brain via a systemic route through the blood-brain barrier (BBB) to efficiently reach neurons. Here we prepare a self-assembled supramolecular nanocarrier with a surface featuring properly configured glucose. The BBB crossing and brain accumulation of this nanocarrier are boosted by the rapid glycaemic increase after fasting and by the putative phenomenon of the highly expressed glucose transporter-1 (GLUT1) in brain capillary endothelial cells migrating from the luminal to the abluminal plasma membrane...
October 17, 2017: Nature Communications
Alexander S Pirozhkov, Yuji Fukuda, Mamiko Nishiuchi, Hiromitsu Kiriyama, Akito Sagisaka, Koichi Ogura, Michiaki Mori, Maki Kishimoto, Hironao Sakaki, Nicholas P Dover, Kotaro Kondo, Nobuhiko Nakanii, Kai Huang, Masato Kanasaki, Kiminori Kondo, Masaki Kando
J-KAREN-P is a high-power laser facility aiming at the highest beam quality and irradiance for performing state-of-the art experiments at the frontier of modern science. Here we approached the physical limits of the beam quality: diffraction limit of the focal spot and bandwidth limit of the pulse shape, removing the chromatic aberration, angular chirp, wavefront and spectral phase distortions. We performed accurate measurements of the spot and peak fluence after an f/1.3 off-axis parabolic mirror under the full amplification at the power of 0...
August 21, 2017: Optics Express
Hugo Larocque, Jérémie Gagnon-Bischoff, Dominic Mortimer, Yingwen Zhang, Frédéric Bouchard, Jeremy Upham, Vincenzo Grillo, Robert W Boyd, Ebrahim Karimi
The orbital angular momentum (OAM) carried by optical beams is a useful quantity for encoding information. This form of encoding has been incorporated into various works ranging from telecommunications to quantum cryptography, most of which require methods that can rapidly process the OAM content of a beam. Among current state-of-the-art schemes that can readily acquire this information are so-called OAM sorters, which consist of devices that spatially separate the OAM components of a beam. Such devices have found numerous applications in optical communications, a field that is in constant demand for additional degrees of freedom, such as polarization and wavelength, into which information can also be encoded...
August 21, 2017: Optics Express
Miaomiao Xu, Hong Hua
The human visual system can perceive a much wider range of contrast than the addressable dynamic range afforded by the state-of-art head mounted displays (HMD). Increasing the dynamic range of HMDs becomes critical especially for augmented reality applications where the dynamic range of outdoor scenes can be as large as 14 orders of magnitude. In this paper, we present the integrated work of the design, implementation, calibration, and image-rendering algorithm of a high dynamic range HMD system. By using a pair of LCoS microdisplays as the spatial light modulators, accompanied with the relay optics to optically overlay the modulation layers, we demonstrate the reconstruction of high dynamic range images with high accuracy...
September 18, 2017: Optics Express
Chi Wang, Alexander Wilkie, Petr Harcuba, Lukas Novosad
Microfacet-based BRDF models are a common tool to describe light scattering from glossy surfaces. Apart from their wide-ranging applications in optics, such models also play a significant role in computer graphics for photorealistic rendering purposes. In this paper, we mainly investigate the computer graphics aspect of this technology, and present a polarisation-aware brute force simulation of light interaction with both single and multiple layered micro-facet surfaces. Such surface models are commonly used in computer graphics, but the resulting BRDF is ultimately often only approximated...
September 18, 2017: Optics Express
Chao Tian, Shengchun Liu
Fringe analysis in two-shot phase-shifting interferometry is important but meets challenges due to a limited number of images, corrupting noise, and background modulation. Here we propose an effective algorithm for phase retrieval from two interferograms with unknown phase shifts. The algorithm first evaluates the phase shift in a local mask through phase fitting and global optimization and then computes a full-field phase map using an arctangent function. Since the phase shift evaluation is performed within a local mask, the algorithm is fast compared with conventional optimization-based algorithms and typically needs tens of seconds to complete the processing...
September 4, 2017: Optics Express
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