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https://www.readbyqxmd.com/read/28944490/hybrid-ultrasound-mr-guided-hifu-treatment-method-with-3d-motion-compensation
#1
Zarko Celicanin, Gibran Manasseh, Lorena Petrusca, Klaus Scheffler, Vincent Auboiroux, Lindsey A Crowe, Jean-Noel Hyacinthe, Yutaka Natsuaki, Francesco Santini, Christoph D Becker, Sylvain Terraz, Oliver Bieri, Rares Salomir
PURPOSE: Treatments using high-intensity focused ultrasound (HIFU) in the abdominal region remain challenging as a result of respiratory organ motion. A novel method is described here to achieve 3D motion-compensated ultrasound (US) MR-guided HIFU therapy using simultaneous ultrasound and MRI. METHODS: A truly hybrid US-MR-guided HIFU method was used to plan and control the treatment. Two-dimensional ultrasound was used in real time to enable tracking of the motion in the coronal plane, whereas an MR pencil-beam navigator was used to detect anterior-posterior motion...
September 24, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28943861/a-practical-and-time-efficient-high-intensity-interval-training-program-modifies-cardio-metabolic-risk-factors-in-adults-with-risk-factors-for-type-ii-diabetes
#2
Bethan E Phillips, Benjamin M Kelly, Mats Lilja, Jesús Gustavo Ponce-González, Robert J Brogan, David L Morris, Thomas Gustafsson, William E Kraus, Philip J Atherton, Niels B J Vollaard, Olav Rooyackers, James A Timmons
INTRODUCTION: Regular physical activity (PA) can reduce the risk of developing type 2 diabetes, but adherence to time-orientated (150 min week(-1) or more) PA guidelines is very poor. A practical and time-efficient PA regime that was equally efficacious at controlling risk factors for cardio-metabolic disease is one solution to this problem. Herein, we evaluate a new time-efficient and genuinely practical high-intensity interval training (HIT) protocol in men and women with pre-existing risk factors for type 2 diabetes...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28943107/analyses-of-sustained-vowels-in-down-syndrome-ds-a-case-study-using-spectrograms-and-perturbation-data-to-investigate-voice-quality-in-four-adults-with-ds
#3
Tracy Jeffery, Stuart Cunningham, Sandra P Whiteside
OBJECTIVES: Automatic acoustic measures of voice quality in people with Down syndrome (DS) do not reliably reflect perceived voice qualities. This study used acoustic data and visual spectral data to investigate the relationship between perceived voice qualities and acoustic measures. STUDY DESIGN: Participants were four young adults (two males, two females; mean age 23.8 years) with DS and severe learning disabilities, at least one of whom had a hearing impairment...
September 21, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28942783/japanese-registry-for-mechanically-assisted-circulatory-support-first-report
#4
Takeshi Nakatani, Kazuhiro Sase, Hiroaki Oshiyama, Masatoshi Akiyama, Masao Horie, Kan Nawata, Tomohiro Nishinaka, Yoshihisa Tanoue, Koichi Toda, Masao Tozawa, Shunichi Yamazaki, Masanobu Yanase, Hiroshi Ohtsu, Michiko Ishida, Ayaka Hiramatsu, Kensuke Ishii, Soichiro Kitamura
BACKGROUND: In Japan, ventricular assist devices (VADs) have been used for patients with severe heart failure as a bridge to transplantation (BTT) since 1992. However, it was not until 1997, when the Organ Transplant Law was enacted, that medical devices received approval by the national health insurance system for that use. To encourage research and development of innovative medical devices, the Pharmaceuticals and Medical Devices Agency has established a public-private partnership in collaboration with academic societies, hospitals and manufacturers...
October 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28942743/genetic-risk-scores-and-family-history-as-predictors-of-schizophrenia-in-nordic-registers
#5
Y Lu, J G Pouget, O A Andreassen, S Djurovic, T Esko, C M Hultman, A Metspalu, L Milani, T Werge, P F Sullivan
BACKGROUND: Family history is a long-standing and readily obtainable risk factor for schizophrenia (SCZ). Low-cost genotyping technologies have enabled large genetic studies of SCZ, and the results suggest the utility of genetic risk scores (GRS, direct assessments of inherited common variant risk). Few studies have evaluated family history and GRS simultaneously to ask whether one can explain away the other. METHODS: We studied 5959 SCZ cases and 8717 controls from four Nordic countries...
September 25, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28942609/custom-extracellular-matrix-cylinder-mitral-valve-in-a-pediatric-patient
#6
Clifford L Cua, Pace Johnston, Jill Harmon, Kathryn Shelton, Patrick I McConnell
Mitral valve construction using extracellular matrix (ECM) is a relatively new procedure. In this case, a 15-month-old boy with a history of severe mitral valve regurgitation secondary to endocarditis underwent mitral valve surgery. Mitral valve repair was not possible, and thus, a 17 mm extracellular matrix cylinder valve (ECM-CV) was constructed for valve replacement. The ECM-CV is clearly imaged using echocardiography, especially three-dimensional imaging, that helped define valve function. As the use of ECM for valve construction increases, echocardiography will play an essential role in evaluating the function and mechanics of these novel valves...
September 24, 2017: Echocardiography
https://www.readbyqxmd.com/read/28942474/svct2-expression-and-function-in-reactive-astrocytes-is-a-common-event-in-different-brain-pathologies
#7
Katterine Salazar, Fernando Martínez, Margarita Pérez-Martín, Manuel Cifuentes, Laura Trigueros, Luciano Ferrada, Francisca Espinoza, Natalia Saldivia, Romina Bertinat, Katherine Forman, María José Oviedo, Antonio J López-Gambero, Christian Bonansco, Ernesto R Bongarzone, Francisco Nualart
Ascorbic acid (AA), the reduced form of vitamin C, acts as a neuroprotector by eliminating free radicals in the brain. Sodium/vitamin C co-transporter isoform 2 (SVCT2) mediates uptake of AA by neurons. It has been reported that SVCT2 mRNA is induced in astrocytes under ischemic damage, suggesting that its expression is enhanced in pathological conditions. However, it remains to be established if SVCT expression is altered in the presence of reactive astrogliosis generated by different brain pathologies. In the present work, we demonstrate that SVCT2 expression is increased in astrocytes present at sites of neuroinflammation induced by intracerebroventricular injection of a GFP-adenovirus or the microbial enzyme, neuraminidase...
September 23, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28942277/the-role-of-bioassays-in-the-evaluation-of-ecotoxicological-aspects-within-the-pef-oef-protocols-the-case-of-wwtps
#8
Roberta Pedrazzani, Irma Cavallotti, Edoardo Bollati, Marta Ferreri, Giorgio Bertanza
The suitability evaluation of any industrial process should rely on economic, technical, social and, in particular, environmental aspects. The Commission Recommendation 2013/179/UE enables the improvement and the harmonization of the conventional evaluation of environmental footprints, such as LCA (Life Cycle Assessment), Carbon and Water Footprint, by suggesting the assessment of life cycle environmental performance of products and organisations (PEF, OEF). Novelty aspects reside in including new impact categories (namely, human toxicity cancer effects, human toxicity not-cancer effects and eco-toxicity)...
September 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28940211/ergodicity-and-model-quality-in-template-restrained-canonical-and-temperature-hamiltonian-replica-exchange-coarse-grained-molecular-dynamics-simulations-of-proteins
#9
Agnieszka S Karczyńska, Cezary Czaplewski, Paweł Krupa, Magdalena A Mozolewska, Keehyoung Joo, Jooyoung Lee, Adam Liwo
Molecular simulations restrained to single or multiple templates are commonly used in protein-structure modeling. However, the restraints introduce additional barriers, thus impairing the ergodicity of simulations, which can affect the quality of the resulting models. In this work, the effect of restraint types and simulation schemes on ergodicity and model quality was investigated by performing template-restrained canonical molecular dynamics (MD), multiplexed replica-exchange molecular dynamics, and Hamiltonian replica exchange molecular dynamics (HREMD) simulations with the coarse-grained UNRES force field on nine selected proteins, with pseudo-harmonic log-Gaussian (unbounded) or Lorentzian (bounded) restraint functions...
September 22, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28939903/determination-of-extracellular-matrix-collagen-fibril-architectures-and-pathological-remodeling-by-polarization-dependent-second-harmonic-microscopy
#10
Denis Rouède, Emmanuel Schaub, Jean-Jacques Bellanger, Frédéric Ezan, Jean-Claude Scimeca, Georges Baffet, François Tiaho
Polarization dependence second harmonic generation (P-SHG) microscopy is gaining increase popularity for in situ quantification of fibrillar protein architectures. In this report, we combine P-SHG microscopy, new linear least square (LLS) fitting and modeling to determine and convert the complex second-order non-linear optical anisotropy parameter ρ of several collagen rich tissues into a simple geometric organization of collagen fibrils. Modeling integrates a priori knowledge of polyhelical organization of collagen molecule polymers forming fibrils and bundles of fibrils as well as Poisson photonic shot noise of the detection system...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28939617/the-j-curve-in-patients-randomly-assigned-to-different-systolic-blood-pressure-targets-an-experimental-approach-to-an-observational-paradigm
#11
Deborah N Kalkman, Tom F Brouwer, Jim T Vehmeijer, Wouter R Berger, Reinoud E Knops, Robbert J de Winter, Ron J Peters, Bert-Jan H van den Born
Background -Low systolic blood pressure (SBP) values are associated with an increased risk of cardiovascular events, giving rise to the so called J-curve phenomenon. We assessed the association between on-treatment SBP levels, cardiovascular events and all-cause mortality in patients randomized to different SBP targets. Methods -Data from two large randomized trials that randomly allocated hypertensive patients at high-risk for cardiovascular disease to intensive (SBP<120 mmHg) or conventional treatment (SBP<140 mmHg) were pooled and harmonized for outcomes and follow-up duration...
September 22, 2017: Circulation
https://www.readbyqxmd.com/read/28939354/a-deep-learning-approach-to-estimate-chemically-treated-collagenous-tissue-nonlinear-anisotropic-stress-strain-responses-from-microscopy-images
#12
Liang Liang, Minliang Liu, Wei Sun
Biological collagenous tissues comprised of networks of collagen fibers are suitable for a broad spectrum of medical applications owing to their attractive mechanical properties. In this study, we developed a noninvasive approach to estimate collagenous tissue elastic properties directly from microscopy images using Machine Learning (ML) techniques. Glutaraldehyde-treated bovine pericardium (GLBP) tissue, widely used in the fabrication of bioprosthetic heart valves and vascular patches, was chosen to develop a representative application...
September 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28939208/discovery-and-characterization-of-human-amniochorionic-membrane-microfractures
#13
Lauren S Richardson, Gracie Vargas, Tyra Brown, Lorenzo Ochoa, Samantha Sheller-Miller, George R Saade, Robert N Taylor, Ramkumar Menon
This study obtained visual evidence of novel cellular and extracellular matrix level structural alterations in term and preterm human fetal amniochorionic membrane. Amniochorions were collected from term cesarean (not in labor) or vaginal deliveries (labor), preterm premature rupture of the membranes, and spontaneous preterm birth. To determine the effect of oxidative stress on membranes at term or preterm labor, term not in labor samples in an organ explant culture in vitro were exposed to cigarette smoke extract...
September 19, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28938829/point-to-set-dynamic-length-scale-in-binary-lennard-jones-glass-formers
#14
Baicheng Mei, Zhenhua Wang, Yuyuan Lu, Hongfei Li, Lijia An
Our recent molecular dynamics simulation results of binary particle glass-former systems demonstrated that the non-monotonic temperature T-dependence of the point-to-set dynamic length scale ξc(dyn) in harmonic (HM) systems is not an intrinsic property of bulk liquids but originates from wall effects. We would expect our results to apply equally to other simple models, such as Lennard-Jones (LJ) systems. However, Hocky et al. presented a monotonic T-dependent ξc(dyn) in a LJ system. Therefore, the present work employs molecular dynamics simulations to investigate the T-dependent behavior of ξc(dyn) in the LJ system employed by Hocky et al...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28938826/crystalline-structures-of-particles-interacting-through-the-harmonic-repulsive-pair-potential
#15
V A Levashov
The behavior of identical particles interacting through the harmonic-repulsive pair potential has been studied in 3D using molecular dynamics simulations at a number of different densities. We found that at many densities, as the temperature of the systems decreases, the particles crystallize into complex structures whose formation has not been anticipated in previous studies on the harmonic-repulsive pair potential. In particular, at certain densities, crystallization into the structure Ia3¯d (space group #230) with 16 particles in the unit cell occupying Wyckoff special positions (16b) was observed...
September 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28938576/computational-prediction-of-human-disease-related-micrornas-by-path-based-random-walk
#16
Israel Mugunga, Ying Ju, Xiangrong Liu, Xiaoyang Huang
MicroRNAs (miRNAs) are a class of small, endogenous RNAs that are 21-25 nucleotides in length. In animals and plants, miRNAs target specific genes for degradation or translation repression. Discovering disease-related miRNA is fundamental for understanding the pathogenesis of diseases. The association between miRNA and a disease is mainly determined via biological investigation, which is complicated by increased biological information due to big data from different databases. Researchers have utilized different computational methods to harmonize experimental approaches to discover miRNA that articulates restrictively in specific environmental situations...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938214/dermal-transfer-and-environmental-release-of-ceo2-nanoparticles-used-as-uv-inhibitors-on-outdoor-surfaces-implications-for-human-and-environmental-health
#17
Justin G Clar, William E Platten, Eric J Baumann, Andrew Remsen, Steve M Harmon, Christina L Bennett-Stamper, Treye A Thomas, Todd P Luxton
A major area of growth for "nano-enabled" consumer products have been surface coatings, including paints stains and sealants. Ceria (CeO2) nanoparticles (NPs) are of interest as they have been used as additives in these these products to increase UV resistance. Currently, there is a lack of detailed information on the potential release, and speciation (i.e., ion vs. particle) of CeO2 NPs used in consumer-available surface coatings during intended use scenarios. In this study, both Micronized-Copper Azole pressure-treated lumber (MCA), and a commercially available composite decking were coated with CeO2 NPs dispersed in Milli-Q water or wood stain...
September 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28937957/whole-blood-based-multiplex-immunoassays-for-the-evaluation-of-human-biomarker-responses-to-emerging-viruses-in-resource-limited-regions
#18
Jessica R Harmon, Stuart T Nichol, Christina F Spiropoulou, Anita K McElroy
Many emerging viruses such as Ebola and Lassa occur in resource-limited areas of the world. The advent of multiplex immunoassays has facilitated the study of biomarkers of disease since only small amounts of clinical material are required; however, such assays are designed and validated for only plasma or serum. This is a significant impediment when studying infectious diseases in the context of an outbreak in a developing nation. Plasma or serum can be difficult to obtain in the field due to the need for additional processing of infectious materials...
September 22, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28936356/implementation-of-the-european-health-interview-survey-ehis-into-the-german-health-update-geda
#19
C Lange, J D Finger, J Allen, S Born, J Hoebel, R Kuhnert, S Müters, J Thelen, P Schmich, M Varga, E von der Lippe, M Wetzstein, T Ziese
BACKGROUND: This methodological paper describes the integration of the 'European Health Interview Survey wave 2' (EHIS 2) into the 'German Health Update' 2014/2015 (GEDA 2014/2015-EHIS). METHODS: GEDA 2014/2015-EHIS is a cross-sectional health survey. A two-stage stratified cluster sampling approach was used to recruit persons aged 15 years and older with permanent residence in Germany. Two different modes of data collection were used, self-administered web questionnaire and self-administered paper questionnaire...
2017: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/28936280/enhancing-diffusion-mri-measures-by-integrating-grey-and-white-matter-morphometry-with-hyperbolic-wasserstein-distance
#20
Wen Zhang, Jie Shi, Jun Yu, Liang Zhan, Paul M Thompson, Yalin Wang
In order to improve the preclinical diagnose of Alzheimer's disease (AD), there is a great deal of interest in analyzing the AD related brain structural changes with magnetic resonance image (MRI) analyses. As the major features, variation of the structural connectivity and the cortical surface morphometry provide different views of structural changes to determine whether AD is present on presymptomatic patients. However, the large scale tensor-valued information and relatively low imaging resolution in diffusion MRI (dMRI) have created huge challenges for analysis...
2017: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
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