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https://www.readbyqxmd.com/read/29458203/precision-pharmacology-for-alzheimer-s-disease
#1
REVIEW
Harald Hampel, Andrea Vergallo, Lisi Flores Aguilar, Norbert Benda, Karl Broich, A Claudio Cuello, Jeffrey Cummings, Bruno Dubois, Howard J Federoff, Massimo Fiandaca, Remy Genthon, Marion Haberkamp, Eric Karran, Mark Mapstone, George Perry, Lon S Schneider, Lindsay A Welikovitch, Janet Woodcock, Filippo Baldacci, Simone Lista
The complex multifactorial nature of polygenic Alzheimer's disease (AD) presents significant challenges for drug development. AD pathophysiology is progressing in a non-linear dynamic fashion across multiple systems levels - from molecules to organ systems - and through adaptation, to compensation, and decompensation to systems failure. Adaptation and compensation maintain homeostasis: a dynamic equilibrium resulting from the dynamic non-linear interaction between genome, epigenome, and environment. An individual vulnerability to stressors exists on the basis of individual triggers, drivers, and thresholds accounting for the initiation and failure of adaptive and compensatory responses...
February 16, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29458074/subthalamic-nucleus-stimulation-dopaminergic-treatment-and-impulsivity-in-parkinson-s-disease
#2
Frédérique Fluchère, Borís Burle, Franck Vidal, Wery van den Wildenberg, Tatiana Witjas, Alexandre Eusebio, Jean-Philippe Azulay, Thierry Hasbroucq
BACKGROUND: Deep brain stimulation of the subthalamic nucleus (STN DBS) is known to increase response speed and lower response accuracy in Parkinson's disease (PD) patients. It has been proposed that this speed-accuracy tradeoff is due to enhanced sensitivity of the motor system to sensory information. An alternative possibility is that this effect is due to weakened suppressive processes. The two alternative interpretations can be tested by analyzing the electromyographic activity (EMG) of the response agonists when the patients perform conflict reaction time tasks...
February 16, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29458038/diagnosing-distensible-venous-malformations-of-the-orbit-with-diffusion-weighted-magnetic-resonance-imaging
#3
Evan Kalin-Hajdu, John B Colby, Oluwatobi Idowu, F Lawson Grumbine, Jessica M Kang, Kristin S Hirabayashi, Christine M Glastonbury, M Reza Vagefi, Robert C Kersten
PURPOSE: To compare the diffusion-weighted imaging characteristics of non-thrombosed distensible venous malformations of the orbit with that of other histologically-proven orbital tumors. DESIGN: Retrospective case-control study. METHODS: Patients with non-thrombosed distensible venous malformations of the orbit and patients with other histologically-proven orbital tumors were selected for chart review. The main outcome measure was the apparent diffusion coefficient of these lesions...
February 16, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29457471/beck-depression-inventory-as-a-screening-tool-for-depression-in-chronic-haemodialysis-patients
#4
A Bautovich, I Katz, C K Loo, S B Harvey
OBJECTIVES: To evaluate the psychometric properties of the Beck Depression Inventory (BDI) and Cognitive Depression Index (CDI) as a potential screening tool for major depression in haemodialysis (HD) patients. METHODS: Forty-five HD patients completed both the BDI/CDI and diagnostic interview. The interview was conducted by two experienced clinicians and was based on DSM-IV criteria. The sensitivity, specificity and positive (PPV) and negative (NPV) predictive values were then calculated...
February 1, 2018: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
https://www.readbyqxmd.com/read/29457445/model-for-end-stage-liver-disease-and-seven-derivations-to-prioritize-liver-transplant-candidates-which-is-the-winner
#5
Fariba Tohidinezhad, Saeid Eslami, Ameen Abu-Hanna, Mohsen Aliakbarian
OBJECTIVES: Under the present liver transplant policy, patients with the highest risk of death receive preference for organ placement. The aim of this study was to evaluate the Model for End-stage Liver Disease (MELD) and seven prognostic derivatives of this test for outcome prediction in cirrhotic patients on liver transplant wait lists. MATERIAL AND METHODS: The study included 416 patients (65.9% male; age 49 ± 13.9 years) who were entered to liver transplant wait lists from January 2013 to October 2016...
February 16, 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29457287/zero-te-based-pseudo-ct-image-conversion-in-the-head-and-its-application-in-pet-mr-attenuation-correction-and-mr-guided-radiation-therapy-planning
#6
Florian Wiesinger, Mikael Bylund, Jaewon Yang, Sandeep Kaushik, Dattesh Shanbhag, Sangtae Ahn, Joakim H Jonsson, Josef A Lundman, Thomas Hope, Tufve Nyholm, Peder Larson, Cristina Cozzini
PURPOSE: To describe a method for converting Zero TE (ZTE) MR images into X-ray attenuation information in the form of pseudo-CT images and demonstrate its performance for (1) attenuation correction (AC) in PET/MR and (2) dose planning in MR-guided radiation therapy planning (RTP). METHODS: Proton density-weighted ZTE images were acquired as input for MR-based pseudo-CT conversion, providing (1) efficient capture of short-lived bone signals, (2) flat soft-tissue contrast, and (3) fast and robust 3D MR imaging...
February 18, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29457225/aperture-generation-based-on-threshold-segmentation-for-intensity-modulated-radiotherapy-treatment-planning
#7
Jie Yang, Zhiguo Gui, Liyuan Zhang, Pengcheng Zhang
PURPOSE: To reduce computation and decrease planning time with little or no loss in plan quality compared to the column-generation-based (cg) method, a simple method of aperture generation based on threshold segmentation (agts) is proposed. METHODS: The proposed agts strategy consists of two steps. First, a fuzzy controller is used for noise cancellation; then, new apertures are added using the threshold segmentation algorithm. We tested the proposed method on seven prostate tumor cases using the computational environment for radiotherapy research algorithms for the dose calculations and compared the results with those obtained by generating the plan aperture using the cg method...
February 19, 2018: Medical Physics
https://www.readbyqxmd.com/read/29457183/diabatic-potential-energy-surfaces-of-mgh-2-and-dynamic-studies-for-the-mg-3p-h-2-%C3%A2-mgh-h-reaction
#8
Jiuchuang Yuan, Di He, Shufen Wang, Maodu Chen, Keli Han
The global diabatic potential energy surfaces (PESs) of the MgH2 + system, which can be used to study the dynamics of the Mg+ (3p2 P) + H2 (X1 Σ) → MgH+ (X1 Σ+ ) + H(2 S) reaction, are structured for the first time. The diabatic PESs are correlated with the ground state 12 A' and the first excited state 22 A'. The multi-reference configuration interaction method and the VQZ basis set are used in ab initio calculations, and diabatic potential energies are calculated based on the molecular properties of the dipole moment...
February 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29457176/effect-of-hu-protein-on-the-conformation-and-compaction-of-dna-in-a-nanochannel
#9
Durgarao Guttula, Fan Liu, Jeroen A van Kan, Véronique Arluison, Johan R C van der Maarel
The effect of the heat unstable nucleoid structuring protein HU on the conformation of single DNA molecules confined in a nanochannel was investigated with fluorescence microscopy. Pre-incubated DNA molecules contract in the longitudinal direction of the channel with increasing concentration of HU. This contraction is mainly due to HU-mediated bridging of distal DNA segments and is controlled by channel diameter as well as ionic composition and strength of the buffer. For over-threshold concentrations of HU, the DNA molecules compact into an condensed form...
February 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29456958/etiology-of-noise-induced-hearing-loss-nihl-and-its-symptomatic-correlation-with-audiometry-observations-in-type-ii-diabetes
#10
Meena K Yadav, K S Yadav
Type II diabetic mellitus (DM) is a chronic metabolic disease that impairs normal insulin production and glucose transport to the liver and muscles. In the India, about 1-5% population suffer from diabetes or related complication. So there is need to cure this disease. DM chronic auditory complications may include spiral ganglia atrophy, degeneration of the vestibulocochlear nerve myelin sheath, reduction of the number of spiral lamina nerve fibres, and thickening of the capillary walls of the stria vascularis and small arteries...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456954/comparison-of-the-transient-evoked-otoacoustic-emissions-teoaes-and-distortion-products-otoacoustic-emissions-dpoaes-in-normal-hearing-subjects-with-and-without-tinnitus
#11
Maryam Emadi, Mohammad Rezaei, Sirvan Najafi, Ali Faramarzi, Farhad Farahani
The aim of this study was to investigate the possible role of cochlear outer hair cell function with TEOAE and DPOAE tests in patients with normal hearing and tinnitus. 25 tinnitus patients with normal hearing sensitivity selected as study group. Control group consist of 50 normal hearing subjects without tinnitus. All subjects had thresholds below 25 dBHL at frequencies 250-8,000 Hz, tympanogram type A and normal acoustic reflex thresholds. TEOAE were recorded with click stimulus at 80 dB SPL at 1,000, 2,000, 3,000 and 4000 Hz...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456945/audiological-profile-in-primary-sj%C3%A3-gren-s-syndrome-in-a-tertiary-care-setting-and-its-clinical-implications
#12
C V Thanooja, Ann Mary Augustine, Anjali Lepcha, Pulukool Sandhya, Amit Kumar Tyagi, Debashish Danda, Achamma Balraj
This study aims to assess the frequency and the profile of hearing loss among patients with primary Sjögren's syndrome in a tertiary care hospital in India and to look for an association between hearing loss and immunological parameters (anti-SSA antibody, anti-SSB antibody, anticardiolipin antibodies, complements C3 and C4). This prospective observational study was done from January 2011 to October 2011 on consecutive patients diagnosed with primary Sjögren's syndrome in our tertiary care hospital. All patients underwent a puretone audiogram, tympanogram and acoustic reflex testing...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456939/outcomes-of-bone-anchored-hearing-aid-implant-at-universiti-kebangsaan-malaysia-medical-centre-ukmmc
#13
Suhana Abdul Rahim, Bee-See Goh, Safinaz Zainor, Roslenda Abdul Rahman, Asma Abdullah
The cross sectional study was conducted in Universiti Kebangsaan Malaysia Medical Center (UKMMC), Malaysia from August 2012 to December 2013. All patients implanted with in UKMMC from December 2001 until December 2012 was included. Glasgow Benefit Inventory (GBI) questionnaires and UKMMC questionnaires were used as part of the assessment tool. The GBI is a scoring which measures the change in health status produced by surgical interventions. UKMMC questionnaires was invented by our department to assess questions related to social and life style of patients and also the cosmetic perspective Baha implant and other daily related activities...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456937/to-evaluate-and-compare-the-result-of-ossiculoplasty-using-different-types-of-graft-materials-and-prosthesis-in-cases-of-ossicular-discontinuity-in-chronic-suppurative-otitis-media-cases
#14
Suresh Kumar, Kanak Yadav, Tarun Ojha, Abhishek Sharma, Amit Singhal, Saurabh Gakhar
Chronic suppurative otitis media, with and without cholesteatoma, frequently results in disruption of the ossicular chain. The present study was designed to compare the outcome using autologous ossicle and titanium prosthesis in two groups of suitable patients presenting with chronic suppurative otitis media for middle ear reconstructive surgeries. A prospective study done from July 2012 to December 2013, at Mahatma Gandhi Medical College and Hospital, Sitapura, Jaipur (Rajasthan). The target group included patients with chronic suppurative otitis media admitted and planned for reconstructive middle ear surgery...
March 2018: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/29456913/investigating-the-7-year-cost-effectiveness-of-single-level-cervical-disc-replacement-compared-to-anterior-cervical-discectomy-and-fusion
#15
Steven J McAnany, Robert K Merrill, Samuel C Overley, Jun S Kim, Robert L Brochin, Sheeraz A Qureshi
Study Design: Cost-effectiveness analysis. Objectives: To determine the 7-year cost-effectiveness of cervical disc replacement (CDR) and anterior cervical discectomy and fusion (ACDF). Methods: We analyzed 7-year Short Form-36 Health Survey data collected from the Prestige Cervical Disc investigational device exemption study (IDE). The SF-6D algorithm was used to convert this data into health state utilities. Costs were calculated from the payer perspective, and quality adjusted life years (QALYs) were used to represent effectiveness...
February 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29456880/cost-effectiveness-of-nivolumab-in-patients-with-advanced-renal-cell-carcinoma-treated-in-the-united-states
#16
Charles McCrea, Sukhvinder Johal, Shuo Yang, Justin Doan
Background: We evaluated the cost-effectiveness of nivolumab versus everolimus in patients with advanced renal cell carcinoma (RCC) from a US payer perspective. Methods: A partitioned survival model consisting of three health states, progression-free survival (PFS), progressive disease, and death, was developed to evaluate the cost-effectiveness of intravenous nivolumab versus oral everolimus over a lifetime. The proportion of patients in each state was calculated based on parametric distributions fitted to PFS and overall survival (OS) data from CheckMate 025 (N = 821), a large randomized phase 3 trial of nivolumab versus everolimus for advanced RCC...
2018: Experimental Hematology & Oncology
https://www.readbyqxmd.com/read/29456831/early-afterdepolarisation-tendency-as-a-simulated-pro-arrhythmic-risk-indicator
#17
Beth McMillan, David J Gavaghan, Gary R Mirams
Drug-induced Torsades de Pointes (TdP) arrhythmia is of major interest in predictive toxicology. Drugs which cause TdP block the hERG cardiac potassium channel. However, not all drugs that block hERG cause TdP. As such, further understanding of the mechanistic route to TdP is needed. Early afterdepolarisations (EADs) are a cell-level phenomenon in which the membrane of a cardiac cell depolarises a second time before repolarisation, and EADs are seen in hearts during TdP. Therefore, we propose a method of predicting TdP using induced EADs combined with multiple ion channel block in simulations using biophysically-based mathematical models of human ventricular cell electrophysiology...
November 1, 2017: Toxicology Research
https://www.readbyqxmd.com/read/29456757/the-natural-history-of-spinal-deformity-in-patients-with-coffin-lowry-syndrome
#18
M Welborn, S Farrell, P Knott, E Mayekar, S Mardjetko
Purpose: Little is known about the natural history of spinal deformities in Coffin-Lowry syndrome (CLS). Our goal was to evaluate the spinal deformity progression and clinical impact. Methods: In this institutional review board-approved study, we performed a multinational retrospective review of six male CLS patients, aged 13 to 22 years at final follow-up, for a mean of 7.25 years (3 to 13). Results: All showed delayed skeletal maturity. Three had calcifications of their lower cervical ligamentum flavum, all experienced neural axis abnormalities, including lower extremity weakness, numbness and tingling and in one, quadriparesis...
February 1, 2018: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/29456513/stochastic-effects-in-autoimmune-dynamics
#19
Farzad Fatehi, Sergey N Kyrychko, Aleksandra Ross, Yuliya N Kyrychko, Konstantin B Blyuss
Among various possible causes of autoimmune disease, an important role is played by infections that can result in a breakdown of immune tolerance, primarily through the mechanism of "molecular mimicry". In this paper we propose and analyse a stochastic model of immune response to a viral infection and subsequent autoimmunity, with account for the populations of T cells with different activation thresholds, regulatory T cells, and cytokines. We show analytically and numerically how stochasticity can result in sustained oscillations around deterministically stable steady states, and we also investigate stochastic dynamics in the regime of bi-stability...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29456498/using-spm-12-s-second-level-bayesian-inference-procedure-for-fmri-analysis-practical-guidelines-for-end-users
#20
Hyemin Han, Joonsuk Park
Recent debates about the conventional traditional threshold used in the fields of neuroscience and psychology, namely P < 0.05, have spurred researchers to consider alternative ways to analyze fMRI data. A group of methodologists and statisticians have considered Bayesian inference as a candidate methodology. However, few previous studies have attempted to provide end users of fMRI analysis tools, such as SPM 12, with practical guidelines about how to conduct Bayesian inference. In the present study, we aim to demonstrate how to utilize Bayesian inference, Bayesian second-level inference in particular, implemented in SPM 12 by analyzing fMRI data available to public via NeuroVault...
2018: Frontiers in Neuroinformatics
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