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https://www.readbyqxmd.com/read/28346891/spatial-transcriptomics-paving-the-way-for-tissue-level-systems-biology
#1
REVIEW
Andreas E Moor, Shalev Itzkovitz
The tissues in our bodies are complex systems composed of diverse cell types that often interact in highly structured repeating anatomical units. External gradients of morphogens, directional blood flow, as well as the secretion and absorption of materials by cells generate distinct microenvironments at different tissue coordinates. Such spatial heterogeneity enables optimized function through division of labor among cells. Unraveling the design principles that govern this spatial division of labor requires techniques to quantify the entire transcriptomes of cells while accounting for their spatial coordinates...
March 24, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28345780/lewis-acid-mediated-nazarov-cyclization-as-a-convergent-and-enantioselective-entry-to-c-nor-d-homo-steroids
#2
Johannes Krieger, Toni Smeilus, Oliver Schackow, Athanassios Giannis
A straightforward synthesis of C-nor-D-homo steroids starting from (+)-Wieland-Miescher ketone is reported. This convergent synthetic strategy utilizes a scalable diastereoselective Nazarov cyclization of functionalized chiral aryl vinyl ketones, allowing for further functionalization. The ability to conduct this key transformation on a multi-gram scale paves the way for the synthesis of a variety of completely new C-nor-D-homo steroids, without the need of a classic steran steroid rearrangement or achiral linear reaction sequences...
March 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28345584/terahertz-and-mid-infrared-plasmons-in-three-dimensional-nanoporous-graphene
#3
Fausto D'Apuzzo, Alba R Piacenti, Flavio Giorgianni, Marta Autore, Mariangela Cestelli Guidi, Augusto Marcelli, Ulrich Schade, Yoshikazu Ito, Mingwei Chen, Stefano Lupi
Two-dimensional (2D) graphene emerged as an outstanding material for plasmonic and photonic applications due to its charge-density tunability, high electron mobility, optical transparency and mechanical flexibility. Recently, novel fabrication processes have realised a three-dimensional (3D) nanoporous configuration of high-quality monolayer graphene which provides a third dimension to this material. In this work, we investigate the optical behaviour of nanoporous graphene by means of terahertz and infrared spectroscopy...
March 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28345089/dancing-disclinations-in-confined-active-nematics
#4
Tyler N Shendruk, Amin Doostmohammadi, Kristian Thijssen, Julia M Yeomans
The spontaneous emergence of collective flows is a generic property of active fluids and often leads to chaotic flow patterns characterised by swirls, jets, and topological disclinations in their orientation field. However, the ability to achieve structured flows and ordered disclinations is of particular importance in the design and control of active systems. By confining an active nematic fluid within a channel, we find a regular motion of disclinations, in conjunction with a well defined and dynamic vortex lattice...
March 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28345047/molecular-beam-brightening-by-shock-wave-suppression
#5
Yair Segev, Natan Bibelnik, Nitzan Akerman, Yuval Shagam, Alon Luski, Michael Karpov, Julia Narevicius, Edvardas Narevicius
Supersonic beams are a prevalent source of cold molecules used in the study of chemical reactions, atom interferometry, gas-surface interactions, precision spectroscopy, molecular cooling, and more. The triumph of this method emanates from the high densities produced in relation to other methods; however, beam density remains fundamentally limited by interference with shock waves reflected from collimating surfaces. We show experimentally that this shock interaction can be reduced or even eliminated by cryocooling the interacting surface...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28343764/channelopathies-genetic-testing-and-risk-stratification
#6
Arthur A M Wilde, Ahmad Amin
The cardiac channelopathies are a group of diseases with (disease-) specific electrocardiographic (ECG) characteristics and a disease-specific risk of sudden cardiac death (SCD). This group includes the Long QT Syndromes (LQTS), Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT), Brugada Syndrome (BrS), Short QT Syndromes (SQTS), and Early Repolarization Syndrome (ERS). In the past 2 decades the genetic basis for these disease entities has largely been unraveled and that, together with the identification of the genetic basis of the cardiomyopathies, has paved the way for the complete new field of Cardiogenetics...
March 18, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28342851/site-specific-photocoupling-of-pbpa-mutated-scfv-antibodies-for-use-in-affinity-proteomics
#7
Mattias Brofelth, Lars Wagner Städe, Anna Isinger Ekstrand, Linn Petersson Edfeldt, Rebeka Kovačič, Thorbjørn Terndrup Nielsen, Kim Lambertsen Larsen, Laurent Duroux, Christer Wingren
Recombinant antibody libraries can provide a source of renewable and high-performing binders tailored for use in affinity proteomics. In this context, the process of generating site-specific 1:1 tagging/functionalization and/or orientated surface immobilization of antibodies has, however, proved to be challenging. Hence, novel ways of generating such engineered antibodies for use in affinity proteomics could have a major impact on array performance. In this study, we have further tailored the design of human recombinant scFv antibodies for site-specific photocoupling through the use of an unnatural amino acid (UAA) and the Dock'n'Flash technology...
March 22, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28342735/inhibition-of-effector-antigen-specific-t-cells-by-intradermal-administration-of-heme-oxygenase-1-inducers
#8
Thomas Simon, Julien Pogu, Séverine Rémy, Frédéric Brau, Sylvie Pogu, Maud Maquigneau, Jean-François Fonteneau, Nicolas Poirier, Bernard Vanhove, Gilles Blancho, Eliane Piaggio, Ignacio Anegon, Philippe Blancou
Developing protocols aimed at inhibiting effector T cells would be key for the treatment of T cell-dependent autoimmune diseases including type 1 autoimmune diabetes (T1D) and multiple sclerosis (MS). While heme oxygenase-1 (HO-1) inducers are clinically approved drugs for non-immune-related diseases, they do have immunosuppressive properties when administered systemically in rodents. Here we show that HO-1 inducers inhibit antigen-specific effector T cells when injected intradermally together with the T cell cognate antigens in mice...
March 22, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28342324/short-bursts-of-cyclic-mechanical-compression-modulate-tissue-formation-in-a-3d-hybrid-scaffold
#9
M Brunelli, C M Perrault, D Lacroix
Among the cues affecting cells behaviour, mechanical stimuli are known to have a key role in tissue formation and mineralization of bone cells. While soft scaffolds are better at mimicking the extracellular environment, they cannot withstand the high loads required to be efficient substitutes for bone in vivo. We propose a 3D hybrid scaffold combining the load-bearing capabilities of polycaprolactone (PCL) and the ECM-like chemistry of collagen gel to support the dynamic mechanical differentiation of human embryonic mesodermal progenitor cells (hES-MPs)...
March 18, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28342286/switching-aurora-a-kinase-on-and-off-at-an-allosteric-site
#10
REVIEW
Richard Bayliss, Selena G Burgess, Patrick J McIntyre
Protein kinases are central players in the regulation of cell cycle and signalling pathways. Their catalytic activities are strictly regulated through post-translational modifications and protein-protein interactions that control switching between inactive and active states. These states have been studied extensively using protein crystallography, although the dynamic nature of protein kinases makes it difficult to capture all relevant states. Here we describe two recent structures of Aurora-A kinase that trap its active and inactive states...
March 25, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28341415/diuretic-strategies-in-acute-heart-failure-and-renal-dysfunction-conventional-vs-carbohydrate-antigen-125-guided-strategy-clinical-trial-design
#11
Sergio García-Blas, Clara Bonanad, Pau Llàcer, Silvia Ventura, José María Núñez, Ruth Sánchez, Carlos Chamorro, Lorenzo Fácila, Rafael de la Espriella, Juana María Vaquer, Alberto Cordero, Mercè Roqué, Víctor Ortiz, Paolo Racugno, Vicent Bodí, Ernesto Valero, Enrique Santas, María Del Carmen Moreno, Gema Miñana, Arturo Carratalá, Lourdes Bondanza, Ana Payá, Ingrid Cardells, Raquel Heredia, Mauricio Pellicer, Guillermo Valls, Patricia Palau, María José Bosch, Rafael Raso, Andrés Sánchez, Vicente Bertomeu-González, Vicente Bertomeu-Martínez, Vicente Montagud-Balaguer, Cristina Albiach-Montañana, Jezabel Pendás-Meneau, Goitzane Marcaida, Sonia Cervantes-García, Rodolfo San Antonio, Elisabet de Mingo, Francisco J Chorro, Juan Sanchis, Julio Núñez
INTRODUCTION AND OBJECTIVES: The optimal treatment of patients with acute heart failure (AHF) and cardiorenal syndrome type 1 (CRS-1) is far from being well-defined. Arterial hypoperfusion in concert with venous congestion plays a crucial role in the pathophysiology of CRS-I. Plasma carbohydrate antigen 125 (CA125) has emerged as a surrogate of fluid overload in AHF. The aim of this study was to evaluate the clinical usefulness of CA125 for tailoring the intensity of diuretic therapy in patients with CRS-1...
March 21, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28341267/in-vivo-clinical-and-radiological-effects-of-platelet-rich-plasma-on-interstitial-supraspinatus-lesion-case-series
#12
A Lädermann, M A Zumstein, F C Kolo, M Grosclaude, L Koglin, A J P Schwitzguebel
BACKGROUND: Rotator cuff tear (RCT) is a frequent condition of clinical relevance that can be managed with a symptomatic conservative treatment, but surgery is often needed. Biological components like leukocytes and platelet rich plasma (L-PRP) could represent an alternative curative method for interstitial RCT. HYPOTHESES: It has been hypothesized that an ultrasound guided L-PRP injection in supraspinatus interstitial RCT could induce radiological healing. MATERIAL AND METHODS: A prospective case series including 25 patients was performed in order to assess the effect of L-PRP infiltration into supraspinatus interstitial RCTs...
December 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28340341/tridimensional-visualization-and-analysis-of-early-human-development
#13
Morgane Belle, David Godefroy, Gérard Couly, Samuel A Malone, Francis Collier, Paolo Giacobini, Alain Chédotal
Generating a precise cellular and molecular cartography of the human embryo is essential to our understanding of the mechanisms of organogenesis in normal and pathological conditions. Here, we have combined whole-mount immunostaining, 3DISCO clearing, and light-sheet imaging to start building a 3D cellular map of the human development during the first trimester of gestation. We provide high-resolution 3D images of the developing peripheral nervous, muscular, vascular, cardiopulmonary, and urogenital systems...
March 23, 2017: Cell
https://www.readbyqxmd.com/read/28339887/periostin-paves-the-way-for-neonatal-heart-regeneration
#14
James E Hudson, Enzo R Porrello
No abstract text is available yet for this article.
February 28, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28339261/ultimate-precision-of-adaptive-noise-estimation
#15
Stefano Pirandola, Cosmo Lupo
We consider the estimation of noise parameters in a quantum channel, assuming the most general strategy allowed by quantum mechanics. This is based on the exploitation of unlimited entanglement and arbitrary quantum operations, so that the channel inputs may be interactively updated. In this general scenario, we draw a novel connection between quantum metrology and teleportation. In fact, for any teleportation-covariant channel (e.g., Pauli, erasure, or Gaussian channel), we find that adaptive noise estimation cannot beat the standard quantum limit, with the quantum Fisher information being determined by the channel's Choi matrix...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28339209/nitrogen-terminated-diamond-111-surface-for-room-temperature-quantum-sensing-and-simulation
#16
Jyh-Pin Chou, Alex Retzker, Adam Gali
The nitrogen-vacancy (NV) centre in diamond has shown great promise of nano-scale sensing applications, however, near-surface NV suer from relatively short spin coherence time that limits its sensitivity. This is presumably caused by improper surface termination. Using rst-principles calculations, we demonstrate that nitrogen terminated (111) diamond provides electrical inactivity and surface spin noise free properties. We also prove that the nitrogen terminated (111) surface can be fabricated by nitrogen plasma treatment...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28339029/hydroxychloroquine-sensitizes-chronic-myeloid-leukemia-cells-to-v%C3%AE-9v%C3%AE-2-t-cell-mediated-lysis-independent-of-autophagy
#17
Biqing Han, Yanmin Zhao, Yu Lin, Shan Fu, Limengmeng Wang, Mingming Zhang, Ruxiu Tie, Binsheng Wang, Yi Luo, Lizhen Liu, Jian Yu, He Huang
Hydroxychloroquine (HCQ) is the only autophagy inhibitor in clinical use and it has shown great potential in treating chronic myeloid leukemia (CML). By inhibiting autophagy, HCQ enhances the anti-CML efficiency of chemotherapy. In the present study, we demonstrated that HCQ sensitized CML cells to Vγ9Vδ2 T cell-mediated lysis. HCQ inhibited autophagy in CML cells, but the sensitizing effects of HCQ were autophagy-independent. Since the sensitization was not mimicked by ATG7 knockdown and even occurred in the absence of ATG7...
March 24, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28338700/enhanced-piezoelectric-effect-at-the-edges-of-stepped-molybdenum-disulfide-nanosheets
#18
Xiaoxue Song, Fei Hui, Keith Gilmore, Bingru Wang, Guangyin Jing, Zhongchao Fan, Enric Grustan-Gutierrez, Yuanyuan Shi, Lucia Lombardi, Stephen A Hodge, Andrea C Ferrari, Mario Lanza
The development of piezoelectric layered materials may be one of the key elements enabling expansion of nanotechnology, as they offer a solution for the construction of efficient transducers for a wide range of applications, including self-powered devices. Here, we investigate the piezoelectric effect in multilayer (ML) stepped MoS2 flakes obtained by liquid-phase exfoliation, which is especially interesting because it may allow the scalable fabrication of electronic devices using large area deposition techniques (e...
March 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28338656/focal-adhesion-kinase-depletion-reduces-human-hepatocellular-carcinoma-growth-by-repressing-enhancer-of-zeste-homolog-2
#19
Daniela Gnani, Ilaria Romito, Simona Artuso, Marco Chierici, Cristiano De Stefanis, Nadia Panera, Annalisa Crudele, Sara Ceccarelli, Elena Carcarino, Valentina D'Oria, Manuela Porru, Ezio Giorda, Karin Ferrari, Luca Miele, Erica Villa, Clara Balsano, Diego Pasini, Cesare Furlanello, Franco Locatelli, Valerio Nobili, Rossella Rota, Carlo Leonetti, Anna Alisi
Hepatocellular carcinoma (HCC) is the most common type of liver cancer in humans. The focal adhesion tyrosine kinase (FAK) is often over-expressed in human HCC and FAK inhibition may reduce HCC cell invasiveness. However, the anti-oncogenic effect of FAK knockdown in HCC cells remains to be clarified. We found that FAK depletion in HCC cells reduced in vitro and in vivo tumorigenicity, by inducing G2/M arrest and apoptosis, decreasing anchorage-independent growth, and modulating the expression of several cancer-related genes...
March 24, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28338551/standardizing-robotic-lobectomy-feasibility-and-safety-in-128-consecutive-lobectomies-within-a-single-healthcare-system
#20
John F Lazar, Laurence N Spier, Alan R Hartman, Richard S Lazzaro
OBJECTIVE: Single-surgeon cohorts assessing robotically assisted video-assisted thoracic (RA-VATS) lobectomy have reported good outcomes, but there are little data regarding multiple surgeons applying a standard technique in separate hospitals. The purpose of this study was to show how a standardized robotic technique is both safe and reproducible between surgeons and institutions. METHODS: From July 1, 2012, to October 1, 2013, patients undergoing RA-VATS lobectomy for both benign and malignant disease were identified from a prospectively collected database of two thoracic surgeons from different hospitals within the same healthcare system and retrospectively analyzed...
March 23, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
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