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https://www.readbyqxmd.com/read/27913638/ms23-a-master-basic-helix-loop-helix-factor-regulates-the-specification-and-development-of-tapetum-in-maize
#1
Guo-Ling Nan, Jixian Zhai, Siwaret Arikit, Darren Morrow, John Fernandes, Lan Mai, Nhi Nguyen, Blake C Meyers, Virginia Walbot
Successful male gametogenesis involves orchestration of sequential gene regulation for somatic differentiation in pre-meiotic anthers. We report here the cloning of Male Sterile23 (Ms23), encoding an anther-specific predicted basic helix-loop-helix (bHLH) transcription factor required for tapetal differentiation; transcripts localize initially to the precursor secondary parietal cells then predominantly to daughter tapetal cells. In knockout ms23-ref mutant anthers, five instead of the normal four wall layers are observed...
December 2, 2016: Development
https://www.readbyqxmd.com/read/27895550/closed-loop-task-difficulty-adaptation-during-virtual-reality-reach-to-grasp-training-assisted-with-an-exoskeleton-for-stroke-rehabilitation
#2
Florian Grimm, Georgios Naros, Alireza Gharabaghi
Stroke patients with severe motor deficits of the upper extremity may practice rehabilitation exercises with the assistance of a multi-joint exoskeleton. Although this technology enables intensive task-oriented training, it may also lead to slacking when the assistance is too supportive. Preserving the engagement of the patients while providing "assistance-as-needed" during the exercises, therefore remains an ongoing challenge. We applied a commercially available seven degree-of-freedom arm exoskeleton to provide passive gravity compensation during task-oriented training in a virtual environment...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27871971/speed-bridge-arthroscopic-reinsertion-of-tibial-eminence-fracture-complementary-to-the-adjustable-button-fixation-technique
#3
A Hardy, L Casabianca, O Grimaud, A Meyer
In comminuted fracturesof the intercondyloid eminence of the tibial spine, the quality of the reduction and the arthroscopic fixation, notably adjustable suture buttonfixation, is sometimes disappointing with reduction defects of theanterior bone block. In the Speed-Bridge technique, the two traction sutures of the adjustable button fixation are replaced with two braided sutures of different colors. After the button is placed above the eminence, reduction is obtained by tightening the loop of the button. The accessory communitive fragments are then packed in the depressionaround the main fragment...
November 18, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/27867131/neuronavigation-based-on-track-density-image-extracted-from-deterministic-high-definition-fiber-tractography-a-case-report
#4
Peng-Hu Wei, Fei Cong, Ge Chen, Ming-Chu Li, Xin-Guang Yu, Yu-Hai Bao
BACKGROUND: Diffusion tensor imaging(DTI)-based navigation is unable to resolve crossing fibers or to determine with accuracy the fanning, origin, and termination of fibers. It is important to improve the accuracy of localizing white matter fibers for improved surgical approaches. We propose a solution to this problem using navigation based on track density imaging(TDI)extracted from high definition fiber tractography(HDFT). CASE DESCRIPTION: A 28-year-old asymptomatic female patient with a left-lateral ventricle meningioma was enrolled in the present study...
November 17, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27822701/aglh-a-thermophilic-udp-n-acetylglucosamine-1-phosphate-dolichyl-phosphate-glcnac-1-phosphotransferase-initiating-protein-n-glycosylation-pathway-in-sulfolobus-acidocaldarius-is-capable-of-complementing-the-eukaryal-alg7
#5
Benjamin H Meyer, Hosam Shams-Eldin, Sonja-Verena Albers
AglH, a predicted UDP-GlcNAc-1-phosphate:dolichyl phosphate GlcNAc-1-phosphotransferase, is initiating the protein N-glycosylation pathway in the thermoacidophilic crenarchaeon Sulfolobus acidocaldarius. AglH successfully replaced the endogenous GlcNAc-1-phosphotransferase activity of Alg7 in a conditional lethal Saccharomyces cerevisiae strain, in which the first step of the eukaryal protein N-glycosylation process was repressed. This study is one of the few examples of cross-domain complementation demonstrating a conserved polyprenyl phosphate transferase reaction within the eukaryal and archaeal domain like it was demonstrated for Methanococcus voltae (Shams-Eldin et al...
November 7, 2016: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/27707496/early-goal-directed-mobilisation-in-the-surgical-intensive-care-unit-a-randomised-controlled-trial
#6
RANDOMIZED CONTROLLED TRIAL
Stefan J Schaller, Matthew Anstey, Manfred Blobner, Thomas Edrich, Stephanie D Grabitz, Ilse Gradwohl-Matis, Markus Heim, Timothy Houle, Tobias Kurth, Nicola Latronico, Jarone Lee, Matthew J Meyer, Thomas Peponis, Daniel Talmor, George C Velmahos, Karen Waak, J Matthias Walz, Ross Zafonte, Matthias Eikermann
BACKGROUND: Immobilisation predicts adverse outcomes in patients in the surgical intensive care unit (SICU). Attempts to mobilise critically ill patients early after surgery are frequently restricted, but we tested whether early mobilisation leads to improved mobility, decreased SICU length of stay, and increased functional independence of patients at hospital discharge. METHODS: We did a multicentre, international, parallel-group, assessor-blinded, randomised controlled trial in SICUs of five university hospitals in Austria (n=1), Germany (n=1), and the USA (n=3)...
October 1, 2016: Lancet
https://www.readbyqxmd.com/read/27647682/active-delineation-of-meyer-s-loop-using-oriented-priors-through-magnetic-tractography-magnet
#7
Maxime Chamberland, Benoit Scherrer, Sanjay P Prabhu, Joseph Madsen, David Fortin, Kevin Whittingstall, Maxime Descoteaux, Simon K Warfield
Streamline tractography algorithms infer connectivity from diffusion MRI (dMRI) by following diffusion directions which are similarly aligned between neighboring voxels. However, not all white matter (WM) fascicles are organized in this manner. For example, Meyer's loop is a highly curved portion of the optic radiation (OR) that exhibits a narrow turn, kissing and crossing pathways, and changes in fascicle dispersion. From a neurosurgical perspective, damage to Meyer's loop carries a potential risk of inducing vision deficits to the patient, especially during temporal lobe resection surgery...
January 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/27633147/closed-loop-gastric-electrical-stimulation-versus-laparoscopic-adjustable-gastric-band-for-the-treatment-of-obesity-a-randomized-12-month-multicenter-study
#8
T Horbach, G Meyer, S Morales-Conde, I Alarcón, F Favretti, M Anselmino, G M Rovera, J Dargent, C Stroh, M Susewind, A J Torres
OBJECTIVE: To compare the weight loss, change in quality of life (QOL) and safety of closed-loop gastric electrical stimulation (CLGES) versus adjustable gastric band (LAGB) in the treatment of obesity. METHODS: This multicenter, randomized, non-inferiority trial randomly assigned the patients in a 2:1 ratio to laparoscopic CLGES versus LAGB and followed them for 1 year. We enrolled 210 patients, of whom 50 were withdrawn preoperatively. Among 160 remaining patients (mean age=39±11 years; 75% women; mean body mass index=43±6 kg m(-)(2)) 106 received CLGES and 54 received LAGB...
December 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27589505/a-new-therapeutic-application-of%C3%A2-brain-machine-interface-bmi-training-followed-by-hybrid-assistive-neuromuscular-dynamic-stimulation-hands-therapy-for%C3%A2-patients-with-severe-hemiparetic-stroke-a-proof-of-concept-study
#9
Michiyuki Kawakami, Toshiyuki Fujiwara, Junichi Ushiba, Atsuko Nishimoto, Kaoru Abe, Kaoru Honaga, Atsuko Nishimura, Katsuhiro Mizuno, Mitsuhiko Kodama, Yoshihisa Masakado, Meigen Liu
BACKGROUND: Hybrid assistive neuromuscular dynamic stimulation (HANDS) therapy improved paretic upper extremity motor function in patients with severe to moderate hemiparesis. We hypothesized that brain machine interface (BMI) training would be able to increase paretic finger muscle activity enough to apply HANDS therapy in patients with severe hemiparesis, whose finger extensor was absent. OBJECTIVE: The aim of this study was to assess the efficacy of BMI training followed by HANDS therapy in patients with severe hemiparesis...
September 21, 2016: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/27566714/the-evolving-utility-of-diffusion-tensor-tractography-in-the-surgical-management-of-temporal-lobe-epilepsy-a-review
#10
Sananthan Sivakanthan, Elliot Neal, Ryan Murtagh, Fernando L Vale
BACKGROUND: Diffusion tensor imaging (DTI) is a relatively new imaging modality that has found many peri-operative applications in neurosurgery. METHODS: A comprehensive survey of the applications of diffusion tensor imaging (DTI) in planning for temporal lobe epilepsy surgery was conducted. The presentation of this literature is supplemented by a case illustration. RESULTS: The authors have found that DTI is well utilized in epilepsy surgery, primarily in the tractography of Meyer's loop...
November 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27555588/plekhg3-enhances-polarized-cell-migration-by-activating-actin-filaments-at-the-cell-front
#11
Trang Thi Thu Nguyen, Wei Sun Park, Byung Ouk Park, Cha Yeon Kim, Yohan Oh, Jin Man Kim, Hana Choi, Taeyoon Kyung, Cheol-Hee Kim, Gabsang Lee, Klaus M Hahn, Tobias Meyer, Won Do Heo
Cells migrate by directing Ras-related C3 botulinum toxin substrate 1 (Rac1) and cell division control protein 42 (Cdc42) activities and by polymerizing actin toward the leading edge of the cell. Previous studies have proposed that this polarization process requires a local positive feedback in the leading edge involving Rac small GTPase and actin polymerization with PI3K likely playing a coordinating role. Here, we show that the pleckstrin homology and RhoGEF domain containing G3 (PLEKHG3) is a PI3K-regulated Rho guanine nucleotide exchange factor (RhoGEF) for Rac1 and Cdc42 that selectively binds to newly polymerized actin at the leading edge of migrating fibroblasts...
September 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27448534/acute-heart-failure-in-the-young-clinical-characteristics-and-biomarker-profiles
#12
Jasper Tromp, Sven Meyer, Robert J Mentz, Christopher M O'Connor, Marco Metra, Howard C Dittrich, Piotr Ponikowski, John R Teerlink, Gad Cotter, Beth Davison, John G F Cleland, Michael M Givertz, Daniel M Bloomfield, Dirk J van Veldhuisen, Hans L Hillege, Adriaan A Voors, Peter van der Meer
BACKGROUND: Young patients (<50years) exhibit specific characteristics in chronic heart failure (HF), but their phenotype in acute heart failure (AHF) is not well described. METHODS AND RESULTS: 2033 patients of the PROTECT trial were divided into two groups: young patients (≤50years) and older patients (>50years). Biomarkers from different pathophysiological domains were available in 1266 patients. Patients were compared with regard to clinical characteristics, biomarker profiles, and in-hospital (worsening renal function [WRF] and decongestion) and post-discharge (180-day survival) outcome...
October 15, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27445658/closed-loop-neuroprosthesis-for-reach-to-grasp-assistance-combining-adaptive-multi-channel-neuromuscular-stimulation-with-a-multi-joint-arm-exoskeleton
#13
Florian Grimm, Alireza Gharabaghi
Stroke patients with severe motor deficits cannot execute task-oriented rehabilitation exercises with their affected upper extremity. Advanced rehabilitation technology may support them in performing such reach-to-grasp movements. The challenge is, however, to provide assistance as needed, while maintaining the participants' commitment during the exercises. In this feasibility study, we introduced a closed-loop neuroprosthesis for reach-to-grasp assistance which combines adaptive multi-channel neuromuscular stimulation with a multi-joint arm exoskeleton...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27371565/glypican-1-stimulates-skp2-autoinduction-loop-and-g1-s-transition-in-endothelial-cells
#14
(no author information available yet)
No abstract text is available yet for this article.
July 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27256450/a-novel-set-up-for-the-ex-vivo-analysis-of-mechanical-properties-of-mouse-aortic-segments-stretched-at-physiological-pressure-and-frequency
#15
Arthur J A Leloup, Cor E Van Hove, Ammar Kurdi, Sofie De Moudt, Wim Martinet, Guido R Y De Meyer, Dorien M Schrijvers, Gilles W De Keulenaer, Paul Fransen
KEY POINTS: Cyclic stretch is known to alter intracellular pathways involved in vessel tone regulation. We developed a novel set-up that allows straightforward characterization of the biomechanical properties of the mouse aorta while stretched at a physiological heart rate (600 beats min(-1) ). Active vessel tone was shown to have surprisingly large effects on isobaric stiffness. The effect of structural vessel wall alterations was confirmed using a genetic mouse model. This set-up will contribute to a better understanding of how active vessel wall components and mechanical stimuli such as stretch frequency and amplitude regulate aortic mechanics...
November 1, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27216180/antagonizing-integrin-%C3%AE-3-increases-immunosuppression-in-cancer
#16
Xinming Su, Alison K Esser, Sarah R Amend, Jingyu Xiang, Yalin Xu, Michael H Ross, Gregory C Fox, Takayuki Kobayashi, Veronica Steri, Kirsten Roomp, Francesca Fontana, Michelle A Hurchla, Brett L Knolhoff, Melissa A Meyer, Elizabeth A Morgan, Julia C Tomasson, Joshua S Novack, Wei Zou, Roberta Faccio, Deborah V Novack, Stephen D Robinson, Steven L Teitelbaum, David G DeNardo, Jochen G Schneider, Katherine N Weilbaecher
Integrin β3 is critical for tumor invasion, neoangiogenesis, and inflammation, making it a promising cancer target. However, preclinical and clinical data of integrin β3 antagonists have demonstrated no benefit or worse outcomes. We hypothesized that integrin β3 could affect tumor immunity and evaluated tumors in mice with deletion of integrin β3 in macrophage lineage cells (β3KOM). β3KOM mice had increased melanoma and breast cancer growth with increased tumor-promoting M2 macrophages and decreased CD8(+) T cells...
June 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/27214312/corticosteroid-binding-globulin-a-review-of-basic-and-clinical-advances
#17
E J Meyer, M A Nenke, W Rankin, J G Lewis, D J Torpy
Corticosteroid-binding globulin (CBG, transcortin) is the primary cortisol binding protein. It is a non-inhibitory serine protease inhibitor, capable of conformational change from a high cortisol-binding affinity form to a low affinity form upon cleavage of its reactive centre loop by various proteases, such as neutrophil elastase. The burgeoning inflammatory role of CBG applies to acute, severe inflammation where depletion is associated with mortality, and to chronic inflammation where defects in cortisol delivery may perpetuate inflammation...
June 2016: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/27208278/regulatory-role-of-a-receptor-like-kinase-in-specifying-anther-cell-identity
#18
Li Yang, Xiaoling Qian, Mingjiao Chen, Qili Fei, Blake C Meyers, Wanqi Liang, Dabing Zhang
In flowering plants, sequential formation of anther cell types is a highly ordered process that is essential for successful meiosis and sexual reproduction. Differentiation of meristematic cells and cell-cell communication are proposed to coordinate anther development. Among the proposed mechanisms of cell fate specification are cell surface-localized Leu-rich repeat receptor-like kinases (LRR-RLKs) and their putative ligands. Here, we present the genetic and biochemical evidence that a rice (Oryza sativa) LRR-RLK, MSP1 (MULTIPLE SPOROCYTE1), interacts with its ligand OsTDL1A (TPD1-like 1A), specifying the cell identity of anther wall layers and microsporocytes...
July 2016: Plant Physiology
https://www.readbyqxmd.com/read/27107046/proposing-a-novel-technique-to-exclude-the-left-ventricle-with-an-assist-device-insights-from-4-dimensional-flow-magnetic-resonance-imaging
#19
Stefan Klotz, Roza Meyer-Saraei, Alex Frydrychowicz, Michael Scharfschwerdt, Leon M Putman, Stefanie Halder, Hans-Hinrich Sievers
OBJECTIVES: Left ventricular assist device (LVAD) implantation has become an effective treatment for end-stage heart failure patients. However, LVAD support disrupts the natural intracavitary blood flow path through the heart, introducing flow patterns potentially associated with thrombosis especially around the inflow cannula. We present initial insights into in vitro 4D flow magnetic resonance imaging (MRI)-based analysis of flow patterns and an enzyme-activated milk test in a porcine left ventricular (LV) model during LVAD support, in a standard implant technique and in combination with a novel cone-shaped LV sparing prosthesis...
September 2016: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/27090262/tendon-collagen-crosslinking-offers-potential-to-improve-suture-pullout-in-rotator-cuff-repair-an-ex-vivo-sheep-study
#20
Roland S Camenzind, Karl Wieser, Gion Fessel, Dominik C Meyer, Jess G Snedeker
BACKGROUND: The suture-tendon interface is often the weakest link in tendon to bone repair of massive rotator cuff tears. Genipin is a low-toxicity collagen crosslinker derived from the gardenia fruit that has been shown to augment collagen tissue strength and mechanically arrest tendon-tear progression. QUESTION/PURPOSE: The purpose of the current study was to evaluate whether genipin crosslinking can sufficiently augment the suture-tendon interface to improve suture pullout strength using simple single-loop sutures and the modified Mason-Allen technique...
August 2016: Clinical Orthopaedics and related Research
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