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https://www.readbyqxmd.com/read/28098823/integrative-mirna-gene-expression-analysis-enables-refinement-of-associated-biology-and-prediction-of-response-to-cetuximab-in-head-and-neck-squamous-cell-cancer
#1
Loris De Cecco, Marco Giannoccaro, Edoardo Marchesi, Paolo Bossi, Federica Favales, Laura D Locati, Lisa Licitra, Silvana Pilotti, Silvana Canevari
This paper documents the process by which we, through gene and miRNA expression profiling of the same samples of head and neck squamous cell carcinomas (HNSCC) and an integrative miRNA-mRNA expression analysis, were able to identify candidate biomarkers of progression-free survival (PFS) in patients treated with cetuximab-based approaches. Through sparse partial least square-discriminant analysis (sPLS-DA) and supervised analysis, 36 miRNAs were identified in two components that clearly separated long- and short-PFS patients...
January 14, 2017: Genes
https://www.readbyqxmd.com/read/28097055/comprehensive-transcriptome-analysis-provides-new-insights-into-nutritional-strategies-and-phylogenetic-relationships-of-chrysophytes
#2
Daniela Beisser, Nadine Graupner, Christina Bock, Sabina Wodniok, Lars Grossmann, Matthijs Vos, Bernd Sures, Sven Rahmann, Jens Boenigk
BACKGROUND: Chrysophytes are protist model species in ecology and ecophysiology and important grazers of bacteria-sized microorganisms and primary producers. However, they have not yet been investigated in detail at the molecular level, and no genomic and only little transcriptomic information is available. Chrysophytes exhibit different trophic modes: while phototrophic chrysophytes perform only photosynthesis, mixotrophs can gain carbon from bacterial food as well as from photosynthesis, and heterotrophs solely feed on bacteria-sized microorganisms...
2017: PeerJ
https://www.readbyqxmd.com/read/28096681/the-relatives-voice-how-do-relatives-experience-participation-in-reablement-a-qualitative-study
#3
Kari Margrete Hjelle, Herdis Alvsvåg, Oddvar Førland
BACKGROUND: Reablement is an early and time-limited home-based model of rehabilitation intervention with an emphasis on intensive, goal-oriented, and multidisciplinary assistance for persons experiencing functional decline. When rehabilitation in general takes place in the person's own home, in contrast to an institution, relatives may have larger responsibilities in helping and supporting the family member. Although there is evidence, showing that family caregivers, such as spouses and children, experience burdens and demanding situations related to their caregiving role, there are currently few publications exploring relatives' experiences of participating in reablement...
2017: Journal of Multidisciplinary Healthcare
https://www.readbyqxmd.com/read/28095930/quantitative-risk-assessment-of-the-introduction-of-rabies-into-japan-through-the-importation-of-dogs-and-cats-worldwide
#4
N C L Kwan, K Sugiura, Y Hosoi, A Yamada, E L Snary
Japan has been free from rabies since 1958. A strict import regimen has been adopted since 2004 consisting of identification of an animal with microchip, two-time rabies vaccination, neutralizing antibody titration test and a waiting period of 180 days. The present study aims to quantitatively assess the risk of rabies introduction into Japan through the international importation of dogs and cats and hence provide evidence-based recommendations to strengthen the current rabies prevention system. A stochastic scenario tree model was developed and simulations were run using @RISK...
January 18, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28095857/real-time-inverse-kinematics-for-the-upper-limb-a-model-based-algorithm-using-segment-orientations
#5
Bence J Borbély, Péter Szolgay
BACKGROUND: Model based analysis of human upper limb movements has key importance in understanding the motor control processes of our nervous system. Various simulation software packages have been developed over the years to perform model based analysis. These packages provide computationally intensive-and therefore off-line-solutions to calculate the anatomical joint angles from motion captured raw measurement data (also referred as inverse kinematics). In addition, recent developments in inertial motion sensing technology show that it may replace large, immobile and expensive optical systems with small, mobile and cheaper solutions in cases when a laboratory-free measurement setup is needed...
January 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28095650/bone-tissue-engineering-in-oral-peri-implant-defects-in-preclinical-in-vivo-research-a-systematic-review-and-meta-analysis
#6
REVIEW
Siddharth Shanbhag, Nikolaos Pandis, Kamal Mustafa, Jens R Nyengaard, Andreas Stavropoulos
Regeneration and establishment of osseointegration within oral peri-implant bone defects remains a clinical challenge. Bone tissue engineering (BTE) is emerging as a promising alternative to autogenous and/or biomaterial-based bone grafting. The objective of this systematic review was to answer the focused question: in animal models, do cell-based BTE strategies enhance bone regeneration and/or implant osseointegration in experimental peri-implant defects, compared to grafting with autogenous bone or only biomaterial scaffolds? Electronic databases were searched for controlled animal studies reporting on peri-implant defects and implantation of mesenchymal stem cells (MSC) or other cells seeded on biomaterial scaffolds, following PRISMA guidelines...
January 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28095332/signal-and-binding-ii-converting-physico-chemical-responses-to-macromolecule-ligand-interactions-into-thermodynamic-binding-isotherms
#7
REVIEW
Wlodzimierz Bujalowski, Maria J Jezewska, Paul J Bujalowski
Physico-chemical titration techniques are the most commonly used methods in characterizing molecular interactions. These methods are mainly based on spectroscopic, calorimetric, hydrodynamic, etc., measurements. However, truly quantitative physico-chemical methods are absolutely based on the determination of the relationship between the measured signal and the total average degree of binding in order to obtain meaningful interaction parameters. The relationship between the observed physico-chemical signal of whatever nature and the degree of binding must be determined and not assumed, based on some ad hoc intuitive relationship/model, leading to determination of the true binding isotherm...
December 30, 2016: Biophysical Chemistry
https://www.readbyqxmd.com/read/28095178/current-trends-in-multidrug-optimization
#8
Andrea Weiss, Patrycja Nowak-Sliwinska
The identification of effective and long-lasting cancer therapies still remains elusive, partially due to patient and tumor heterogeneity, acquired drug resistance, and single-drug dose-limiting toxicities. The use of drug combinations may help to overcome some limitations of current cancer therapies by challenging the robustness and redundancy of biological processes. However, effective drug combination optimization requires the careful consideration of numerous parameters. The complexity of this optimization problem is clearly nontrivial and likely requires the assistance of advanced heuristic optimization techniques...
December 1, 2016: Journal of Laboratory Automation
https://www.readbyqxmd.com/read/28094988/multi-reference-perturbation-theory-with-cholesky-decomposition-for-the-density-matrix-renormalization-group
#9
Leon Freitag, Stefan Knecht, Celestino Angeli, Markus Reiher
We present a second-order N-electron valence state perturbation theory (NEVPT2) based on a density matrix renormalization group (DMRG) reference wave function that exploits a Cholesky decomposition of the two-electron repulsion integrals (CD-DMRG-NEVPT2). With a parameter-free multireference perturbation theory approach at hand, the latter allows us to efficiently describe static and dynamic correlation in large molecular systems. We demonstrate the applicability of CD-DMRG-NEVPT2 for spin-state energetics of spin-crossover complexes involving calculations with more than 1000 atomic basis functions...
January 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28094936/computation-of-the-isotropic-hyperfine-coupling-constant-efficiency-and-insights-from-a-new-approach-based-on-wave-function-theory
#10
Emmanuel Giner, Lorenzo Tenti, Celestino Angeli, Nicolas Ferré
The present paper reports an original computational strategy for the computation of the isotropic hyperfine coupling constants (hcc). The algorithm proposed here is based on an approach recently introduced by some of the authors, namely the first order breathing orbital self consistent field (FOBO-SCF). The approach is an almost parameter-free wave function method capable to accurately treat the spin delocalization together with the spin polarization effects while staying in a restricted formalism and avoiding spin contamination...
January 17, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28094885/free-radical-carbo-cyanation-of-olefins
#11
Yannick Landais, Vincent Pirenne, Haitham Hassan, Frédéric Robert, Maren Wissing, Chahinaz Khiar, Ashique Hussain
The free-radical 3-component carbo-cyanation of electron-rich olefins has been investigated using p-tosyl cyanide as a cyanide source. Scope and limitation of the process was established varying the nature of the alkene and that of the radical precursor. Carbocyanation of chiral allylsilanes was shown to occur with high diastereocontrol, leading to syn β-silyl nitriles. The origin of the stereocontrol was rationalized through a Felkin-Anh type transition state model. Finally, a tin-free carbocyanation process was also devised, based on the use of a new alkylsulfonyl cyanide incorporating both carbon fragments to be added across the olefinic Π-system...
January 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28094136/day-and-night-glycaemic-control-with-closed-loop-insulin-delivery-versus-conventional-insulin-pump-therapy-in-free-living-adults-with-well-controlled-type-1-diabetes-an-open-label-randomised-crossover-study
#12
Lia Bally, Hood Thabit, Harald Kojzar, Julia K Mader, Jehona Qerimi-Hyseni, Sara Hartnell, Martin Tauschmann, Janet M Allen, Malgorzata E Wilinska, Thomas R Pieber, Mark L Evans, Roman Hovorka
BACKGROUND: Tight control of blood glucose concentration in people with type 1 diabetes predisposes to hypoglycaemia. We aimed to investigate whether day-and-night hybrid closed-loop insulin delivery can improve glucose control while alleviating the risk of hypoglycaemia in adults with HbA1c below 7·5% (58 mmol/mol). METHODS: In this open-label, randomised, crossover study, we recruited adults (aged ≥18 years) with type 1 diabetes and HbA1c below 7·5% from Addenbrooke's Hospital (Cambridge, UK) and Medical University of Graz (Graz, Austria)...
January 13, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28093411/age-and-sex-related-influences-on-left-ventricular-mechanics-in-elderly-individuals-free-of-prevalent-heart-failure-the-aric-study-atherosclerosis-risk-in-communities
#13
Chung-Lieh Hung, Alexandra Gonçalves, Amil M Shah, Susan Cheng, Dalane Kitzman, Scott D Solomon
BACKGROUND: Advanced age is related to left ventricular (LV) remodeling. We sought to investigate the relationships between aging, elevated hemodynamic load, cardiac mechanics, and LV remodeling in an elderly community-based population. METHODS AND RESULTS: We studied 1105 subjects (76±5 years, 61% women) without prevalent heart failure, who attended the visit 5 of the ARIC study (Atherosclerosis Risk in Communities). LV global longitudinal strain, global circumferential strain, and torsion indices were analyzed using 3-dimensional echocardiography...
January 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28093051/prolonged-job-strain-and-subsequent-risk-of-cancer-in-women-a-longitudinal-study-based-on-the-danish-nurse-cohort
#14
Gitte K Vesterlund, Beverley L Høeg, Christoffer Johansen, Berit L Heitmann, Pernille E Bidstrup
BACKGROUND: The role of psychological stress in cancer risk is continuously debated. Stress at work is the most common form of stress and previous studies have shown inconsistent results regarding cancer risk. In this longitudinal study, we examined the association between prolonged job strain across six years and subsequent cancer risk. METHODS AND MATERIALS: We used data from 6571 cancer-free women from the Danish Nurse Cohort aged 45-70 years at inclusion, and self-reported questionnaires on job strain at baseline in 1993 and again in 1999...
January 17, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28092996/chromosome-1-amplification-has-similar-prognostic-value-to-del-17p13-and-t-4-14-p16-q32-in-multiple-myeloma-patients-analysis-of-real-life-data-from-the-polish-myeloma-study-group
#15
Norbert Grzasko, Roman Hajek, Marek Hus, Sylwia Chocholska, Marta Morawska, Krzysztof Giannopoulos, Krzysztof Czarnocki, Agnieszka Druzd-Sitek, Barbara Pienkowska-Grela, Jolanta Rygier, Lidia Usnarska-Zubkiewicz, Dominik Dytfeld, Tadeusz Kubicki, Artur Jurczyszyn, Maciej Korpysz, Anna Dmoszynska
The study aimed to assess prognostic significance of del(13q14), del(17p13), t(4;14)(p16;q32), and amp(1q21) in newly diagnosed myeloma patients treated mostly with thalidomide-based therapies. All genetic abnormalities except del(13q14) were independent prognostic factors associated with shortened progression-free survival (PFS) and overall survival (OS). Patients with no abnormalities, one abnormality, and ≥2 abnormalities had a median PFS of 41.8, 17.0, and 10.0 months, respectively; a median OS was not reached, 48...
January 16, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28092776/periosteum-tissue-engineering-in-an-orthotopic-in%C3%A2-vivo-platform
#16
J G Baldwin, F Wagner, L C Martine, B M Holzapfel, C Theodoropoulos, O Bas, F M Savi, C Werner, E M De-Juan-Pardo, D W Hutmacher
The periosteum plays a critical role in bone homeostasis and regeneration. It contains a vascular component that provides vital blood supply to the cortical bone and an osteogenic niche that acts as a source of bone-forming cells. Periosteal grafts have shown promise in the regeneration of critical size defects, however their limited availability restricts their widespread clinical application. Only a small number of tissue-engineered periosteum constructs (TEPCs) have been reported in the literature. A current challenge in the development of appropriate TEPCs is a lack of pre-clinical models in which they can reliably be evaluated...
November 20, 2016: Biomaterials
https://www.readbyqxmd.com/read/28092514/a-multivariate-approach-for-patient-specific-eeg-seizure-detection-using-empirical-wavelet-transform
#17
Abhijit Bhattacharyya, Ram Bilas Pachori
OBJECTIVE: This paper investigates the multivariate oscillatory nature of electroencephalogram (EEG) signals in adaptive frequency scales for epileptic seizure detection. METHODS: The empirical wavelet transform (EWT) has been explored for the multivariate signals in order to determine the joint instantaneous amplitudes and frequencies in signal adaptive frequency scales. The proposed multivariate extension of EWT has been studied on multivariate multi-component synthetic signal, as well as on multivariate EEG signals of CHB-MIT scalp EEG database...
January 9, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28089192/commissioning-monte-carlo-algorithm-for-robotic-radiosurgery-using-cylindrical-3d-array-with-variable-density-inserts
#18
D Dechambre, V Baart, S Cucchiaro, C Ernst, N Jansen, P Berkovic, C Mievis, P Coucke, A Gulyban
INTRODUCTION: To commission the Monte Carlo (MC) algorithm based model of CyberKnife robotic stereotactic system (CK) and evaluate the feasibility of patient specific QA using the ArcCHECK cylindrical 3D-array (AC) with Multiplug inserts (MP). RESULTS: Four configurations were used for simple beam setup and two for patient QA, replacing water equivalent inserts by lung. For twelve collimators (5-60mm) in simple setup, mean (SD) differences between MC and RayTracing algorithm (RT) of the number of points failing the 3%/1mmgamma criteria were 1(1), 1(3), 1(2) and 1(2) for the four MP configurations...
January 11, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28088762/the-super-n-motifs-model-a-novel-alignment-free-approach-for-representing-and-comparing-rna-secondary-structures
#19
Jean-Pierre Séhi Glouzon, Jean-Pierre Perreault, Shengrui Wang
MOTIVATION: Comparing ribonucleic acid (RNA) secondary structures of arbitrary size uncovers structural patterns that can provide a better understanding of RNA functions. However, performing fast and accurate secondary structure comparisons is challenging when we take into account the RNA configuration (i.e. linear or circular), the presence of pseudoknot and G-quadruplex (G4) motifs and the increasing number of secondary structures generated by high-throughput probing techniques. To address this challenge, we propose the super-n-motifs model based on a latent analysis of enhanced motifs comprising not only basic motifs but also adjacency relations...
January 14, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28088750/continuous-minimally-invasive-alcohol-monitoring-using-microneedle-sensor-arrays
#20
A M Vinu Mohan, Joshua Ray Windmiller, Rupesh K Mishra, Joseph Wang
The present work describes an attractive skin-worn microneedle sensing device for the minimally invasive electrochemical monitoring of subcutaneous alcohol. The device consists of an assembly of pyramidal microneedle structures integrated with Pt and Ag wires, each with a microcavity opening. The microneedle aperture was modified by electropolymerizing o-phenylene diamine onto the Pt wire microtransducer, followed by the immobilization of alcohol oxidase (AOx) in an intermediate chitosan layer, along with an outer Nafion layer...
January 10, 2017: Biosensors & Bioelectronics
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