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Simulation medicine

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https://www.readbyqxmd.com/read/27912878/selecting-optimum-protein-nano-carriers-for-natural-polyphenols-using-chemoinformatics-tools
#1
AbdelKader A Metwally, Sherweit H El-Ahmady, Rania M Hathout
BACKGROUND: The normal fate of any natural product with a therapeutic potential is to be formulated into an effective medicine. However, the conventional methods of selecting the suitable formulations or carriers based on the formulator experiences, trials and errors as well as materials availability do not usually yield the optimal results. HYPOTHESIS: We hypothesize the possibility of the virtual optimum selection of a protein carrier for two polyphenolic compounds widely investigated for their chemopreventive effects; resveratrol and curcumin using a combination of some chemoinformatics tools...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27910126/gradient-echo-epi-using-a-high-degree-shim-insert-coil-at-7%C3%A2-t-implications-for-bold-fmri
#2
Tae Kim, Yoojin Lee, Tiejun Zhao, Hoby P Hetherington, Jullie W Pan
PURPOSE: To quantitatively assess the effects of high degree and order (1(st) -4(th+) ) relative to 1(st) -2(nd) degree B0 shimming at 7 Tesla (T) on gradient-echo echo planar imaging (GE-EPI) and blood-oxygen-level dependent (BOLD) activation. METHODS: Simulations and GE-EPI were performed at (2mm)(3) and (3mm)(3) resolution, evaluating the temporal signal-to-noise ratio (tSNR), transverse relaxivity ( R2*), BOLD % signal change and activated pixel counts in a breath-hold task...
December 1, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27910122/one-stage-individual-participant-data-meta-analysis-models-estimation-of-treatment-covariate-interactions-must-avoid-ecological-bias-by-separating-out-within-trial-and-across-trial-information
#3
Hairui Hua, Danielle L Burke, Michael J Crowther, Joie Ensor, Catrin Tudur Smith, Richard D Riley
Stratified medicine utilizes individual-level covariates that are associated with a differential treatment effect, also known as treatment-covariate interactions. When multiple trials are available, meta-analysis is used to help detect true treatment-covariate interactions by combining their data. Meta-regression of trial-level information is prone to low power and ecological bias, and therefore, individual participant data (IPD) meta-analyses are preferable to examine interactions utilizing individual-level information...
December 1, 2016: Statistics in Medicine
https://www.readbyqxmd.com/read/27908176/activity-cross-calibration-of-unsealed-radionuclides-utilizing-a-portable-ion-chamber
#4
Hans-Sonke Jans
PURPOSE: To present and evaluate an ion chamber-based method for the cross-calibration between sites of activity measurements of unsealed radionuclides. Notably, the method allows direct comparison of short lived (i.e., clinically used) radioisotopes and the cross-calibration of radionuclide activity meters (also known as "dose calibrators"). METHODS: A portable ion chamber has been designed which is easily shipped between sites, e.g., between a standards laboratory and a nuclear medicine department...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27903431/differential-regulation-of-baicalin-and-scutellarin-on-ampk-and-akt-in-promoting-adipose-cell-glucose-disposal
#5
Le-Le Yang, Na Xiao, Jinfeng Liu, Kang Liu, Baolin Liu, Ping Li, Lian-Wen Qi
Baicalin and scutellarin, two flavonoid glucuronic acids isolated from Scutellaria baicalensis, exhibit beneficial effects on glucose homeostasis. Baicalin and scutellarin are similar in structure except scutellarin has an additional hydroxyl at composition C-4'. In this work, we observed that baicalin and scutellarin promoted glucose disposal in mice and in adipocytes. Baicalin selectively increased phosphorylation of AMP-activated kinase (AMPK), while scutellarin selectively enhanced Akt phosphorylation. Both of them increased AS160 phosphorylation and glucose uptake in basal condition...
November 26, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27898627/publishing-trends-in-the-field-of-pediatric-emergency-medicine-from-2004-to-2013
#6
Nancy S Rixe, Jeffrey Rixe, Joshua Glick, Erik Lehman, Robert P Olympia
OBJECTIVE: To identify publishing trends within the field of pediatric emergency medicine between 2004 and 2013. METHODS: We conducted a MEDLINE search of pediatric emergency medicine articles, filtered by clinical trial, published between 2004 and 2013 in ten journals from the fields of pediatrics, emergency medicine, general medicine, and pediatric emergency medicine. Each article was classified by journal type, study design, results (positive or negative/equivocal), age/type of subjects, and major topic (based on the objective of the study)...
December 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/27896145/interprofessional-multiple-step-simulation-course-improves-pediatric-resident-and-nursing-staff-management-of-pediatric-patients-with-diabetic-ketoacidosis
#7
Linnea M Larson-Williams, Amber Q Youngblood, Dawn Taylor Peterson, J Lynn Zinkan, Marjorie L White, Hussein Abdul-Latif, Leen Matalka, Stephen N Epps, Nancy M Tofil
AIM: To investigate the use of a multidisciplinary, longitudinal simulation to educate pediatric residents and nurses on management of pediatric diabetic ketoacidosis. METHODS: A multidisciplinary, multiple step simulation course was developed by faculty and staff using a modified Delphi method from the Pediatric Simulation Center and pediatric endocrinology department. Effectiveness of the simulation for the residents was measured with a pre- and post-test and a reference group not exposed to simulation...
November 4, 2016: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/27893952/acceptability-and-impact-of-a-required-palliative-care-rotation-with-prerotation-and-postrotation-observed-simulated-clinical-experience-during-internal-medicine-residency-training-on-primary-palliative-communication-skills
#8
Maxwell T Vergo, Sharona Sachs, Meredith A MacMartin, Kathryn B Kirkland, Amelia M Cullinan, Lisa A Stephens
BACKGROUND: Improving communication training for primary palliative care using a required palliative care rotation for internal medicine (IM) residents has not been assessed. OBJECTIVE: To assess skills acquisition and acceptability for IM residents not selecting an elective. DESIGN: A consecutive, single-arm cohort underwent preobjective structured clinical examination (OSCE) with learner-centric feedback, two weeks of clinical experience, and finally a post-OSCE to crystallize learner-centric take home points...
November 28, 2016: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/27891152/venipuncture-induced-complex-regional-pain-syndrome-presenting-as-inflammatory-arthritis
#9
Punit Pruthi, Pramod Arora, Manoj Mittal, Anugrah Nair, Waqia Sultana
Venipuncture is one of the most commonly done medical procedures. We report a unique case of a 23-year-old young male who presented with features suggestive of inflammatory arthritis. The symptoms, which initially started on the right side, also involved the other side after a few weeks. Although the patient's symptoms and signs were simulating inflammatory arthritis, he had atypical features like poor response to anti-inflammatory medicines and normal laboratory parameters. His musculoskeletal ultrasonography was also not suggestive of arthritis...
2016: Case Reports in Medicine
https://www.readbyqxmd.com/read/27890007/a-current-perspective-on-the-inhibition-of-cholinesterase-by-natural-and-synthetic-inhibitors
#10
Anzer A Shah, Showkat A Ganie, Mohammad A Kamal, Tanveer Ali Dar
Majority of the observed cognitive and behavioral changes in Alzheimer's diseaseare postulated to be due to the deficiencies in cholinergic pathways of the brain. Enhancement of cholinergic transmission may thus stimulate the cholinergic receptors or prolong the availability of acetylcholine in synaptic cleft and hence improve the Alzheimer's disease associated symptoms. Of these two, the inhibition of cholinesterases (Acetylcholinesterase and Butyrylcholinesterase) by cholinesterase inhibitors is suggested to be a promising strategy...
November 23, 2016: Current Drug Metabolism
https://www.readbyqxmd.com/read/27889326/-inventory-of-training-of-internal-medicine-in-france-results-of-a-national-survey
#11
M Samson, B Terrier, O Mangin, L Mouthon
OBJECTIVE: To make an inventory of training of Internal Medicine in France. METHOD: This study was conducted between May and September 2015 with coordinators (interviews of 45minutes) of local Internal Medicine training and fellows (online questionnaire). RESULTS: All coordinators (n=28) responded to the interviews. Local training of Internal Medicine exists in 86% of regions (3.1±3.1hours/month) and an interregional training in all interregions (34...
November 23, 2016: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/27888946/difficult-doctors-difficult-patients-building-empathy
#12
Patricia F Anderson, Elise Wescom, Ruth C Carlos
Effective doctor-patient communication facilitates the therapeutic relationship, promotes patient physical and mental health, and improves physician satisfaction. Methods of teaching effective communication use a range of techniques, typically combining didactic instruction with simulated communication encounters and reflective discussion. Rarely are patients and physicians exposed to these instructions as colearners. The evidence for the utility of graphic stories, comics, and cartoons to improve patient comprehension and self-regulation is small but encouraging...
December 2016: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/27885821/exploring-simulation-in-the-internal-medicine-clerkship
#13
Brian Kwan, Glory Bui, Paul Jain, Nilesh Shah, Derek Juang
BACKGROUND: Simulation-based medical education has been shown to produce substantial educational benefits; however, the integration and effectiveness of high-fidelity simulation within the internal medicine (IM) clerkship remains largely unexplored. Investigators sought to determine the effectiveness of simulation in improving student confidence in acute coronary syndrome (ACS) and the Advanced Cardiac Life Support (ACLS) curriculum. Secondary goals included examining student perceptions of the role of simulation in medical education...
November 25, 2016: Clinical Teacher
https://www.readbyqxmd.com/read/27885707/spatial-resolution-and-velocity-field-improvement-of-4d-flow-mri
#14
Fraser M Callaghan, Stuart M Grieve
PURPOSE: 4D-flow MRI obtains a time-dependent 3D velocity field; however, its use for the calculation of higher-order parameters is limited by noise. We present an algorithm for denoising 4D-flow data. THEORY AND METHODS: By integrating a velocity field and eliminating streamlines in noisy flow, depicted by high curvature, a denoised dataset may be extracted. This method, defined as the velocity field improvement (VFIT) algorithm, was validated in an analytical dataset and using in vivo data in comparison with a computation fluid dynamics (CFD) simulation...
November 24, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27885191/-modeling-and-simulation-of-trabecular-pattern-formation-in-a-cancellous-bone-defect-under-mechanical-forces
#15
Taiji Adachi
Understanding regeneration of the trabecular structure in cancellous bone defects is an important issue in bone tissue engineering and regenerative medicine. Biochemical and biomechanical viewpoints are indispensable for understanding the fundamental mechanism that underlies the regeneration of the trabecular structure. In vitro observations of the Turing pattern-like bone differentiation into osteoblasts from human mesenchymal stem cells suggest that mathematical modeling and simulation based on a reaction-diffusion system model would help us to understand the mechanism of trabecular pattern formation during cancellous bone regeneration...
2016: Clinical Calcium
https://www.readbyqxmd.com/read/27875310/extending-halogen-based-medicinal-chemistry-to-proteins-iodo-insulin-as-a-case-study
#16
Krystel El Hage, Vijay Pandyarajan, Nelson B Phillips, Brian J Smith, John G Menting, Jonathan Whittaker, Michael C Lawrence, Markus Meuwly, Michael A Weiss
Insulin, a protein critical for metabolic homeostasis, provides a classical model for protein design with application to human health. Recent efforts to improve its pharmaceutical formulation demonstrated that iodination of a conserved tyrosine (Tyr(B26)) enhances key properties of a rapid-acting clinical analog. Moreover, the broad utility of halogens in medicinal chemistry has motivated use of hybrid quantum- and molecular-mechanical methods to study proteins. Here, we (i) undertook quantitative atomic-level simulations of 3-I-Tyr(B26)-insulin to predict its structural features and (ii) tested these predictions by X-ray crystallography...
November 14, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27873353/adaptively-optimized-combination-aoc-of-phased-array-mr-spectroscopy-data-in-the-presence-of-correlated-noise-compared-with-noise-decorrelated-or-whitened-methods
#17
Minjie Wu, Liang Fang, Charles E Ray, Anand Kumar, Shaolin Yang
PURPOSE: A method for adaptively optimized combination (AOC) of MR spectroscopic data from a coil array was recently introduced. The superior performance of the AOC method is evident when compared with the methods that assume uncorrelated noise between coil elements. However, it is unclear whether the AOC method represents the most optimal combination in the presence of correlated noise, when compared with the noise-decorrelated or whitened methods that specifically tackle the correlated noise between coil elements...
November 21, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27872650/the-cholesterol-lowering-effect-of-alisol-acetates-based-on-hmg-coa-reductase-and-its-molecular-mechanism
#18
Fei Xu, Hui Yu, Cai Lu, Jun Chen, Wei Gu
This study measured the impact of alisol B 23-acetate and alisol A 24-acetate, the main active ingredients of the traditional Chinese medicine Alismatis rhizoma, on total cholesterol (TC), triglyceride (TG), high density lipoprotein-cholesterol (HDL-C), and low density lipoprotein-cholesterol (LDL-C) levels of hyperlipidemic mice. The binding of alisol B 23-acetate and alisol A 24-acetate to the key enzyme involved in the metabolism of TC, 3-hydroxy-3-methylglutary-coenzyme A (HMG-CoA) reductase, was studied using the reagent kit method and the western blotting technique combined with a molecular simulation technique...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/27868238/suppression-of-ghost-artifacts-arising-from-long-t1-species-in-segmented-inversion-recovery-imaging
#19
Elizabeth R Jenista, Wolfgang G Rehwald, Nayla H Chaptini, Han W Kim, Michele A Parker, David C Wendell, Enn-Ling Chen, Raymond J Kim
PURPOSE: We demonstrate an improved segmented inversion-recovery sequence that suppresses ghost artifacts arising from tissues with long T1 ( > 1.5 s). THEORY AND METHODS: Long T1 species such as pericardial fluid can create bright ghost artifacts in segmented, inversion-recovery MRI because of oscillations in longitudinal magnetization between segments. A single dummy acquisition at the beginning of the sequence can reduce oscillations; however, its effectiveness in suppressing long T1 artifacts is unknown...
November 20, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27867250/approaches-to-the-estimation-of-the-local-average-treatment-effect-in-a-regression-discontinuity-design
#20
Aidan G O'Keeffe, Gianluca Baio
Regression discontinuity designs (RD designs) are used as a method for causal inference from observational data, where the decision to apply an intervention is made according to a 'decision rule' that is linked to some continuous variable. Such designs are being increasingly developed in medicine. The local average treatment effect (LATE) has been established as an estimator of the intervention effect in an RD design, particularly where a design's 'decision rule' is not adhered to strictly. Estimating the variance of the LATE is not necessarily straightforward...
December 2016: Scandinavian Journal of Statistics, Theory and Applications
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