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https://www.readbyqxmd.com/read/28449168/mri-sequences-in-head-neck-radiology-state-of-the-art
#1
Gerlig Widmann, Benjamin Henninger, Christian Kremser, Werner Jaschke
Background Magnetic resonance imaging (MRI) has become an essential imaging modality for the evaluation of head & neck pathologies. However, the diagnostic power of MRI is strongly related to the appropriate selection and interpretation of imaging protocols and sequences. The aim of this article is to review state-of-the-art sequences for the clinical routine in head & neck MRI and to describe the evidence for which medical question these sequences and techniques are useful. Method Literature review of state-of-the-art sequences in head & neck MRI...
May 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28449154/dual-raas-blockade-with-aliskiren-in-patients-with-severely-impaired-chronic-kidney-disease
#2
Franz Maximilian Rasche, Claudia Joel, Thomas Ebert, Thomas Frese, Filip Barinka, Volker Busch, Wilma Gertrud Rasche, Tom H Lindner, Jochen Schneider, Stephan Schiekofer
Dual renin-angiotensin-aldosterone blockade (dRAASb) is purposed in the prevention of the cardiorenal syndrome (CRS). However, all attempts with dRAASb even in patients with moderate impaired chronic kidney disease (CKD) were terminated due to the typical severe adverse events (SAE), e. g., hyperkalemia and rise of serum creatinine. The aim of our study with the direct renin inhibitor aliskiren was to evaluate the effect of dRAASb with a washout phase in patients with severely advanced CKD. We have studied 45 patients (G3b to 4, A2 and >A3; median glomerular filtration rate (GFR) CKD-EPI 31 (23-40) ml/min per 1...
April 27, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28448867/immuno-modulatory-and-cellular-antioxidant-activities-of-%C3%AE%C2%BA-selenocarrageenan-in-combination-with-epirubicin-in-h22-hepatoma-bearing-mice
#3
Na Ling, Xiaojun Zhou, Yubin Ji, Wenlan Li, Chenfeng Ji, Zheng Qi
BACKGROUND: Human hepatocellular carcinoma (HCC) has a high rate of tumor recurrence and metastasis, resulting in shortened survival time. The aim of this study is to evaluate the synergistic anti-tumor effects and underlying mechanism of κ-selenocarrageenan (KSC) in combination with the chemotherapy drug epirubicin (EPI) in H22 tumor-bearing mice. METHODS: Hepatocellular carcinoma H22 cells were implanted into mice. After the transplants were successfully established, the animals were divided into four groups: namely the control group, the KSC group, the EPI group and the KSC+EPI group...
April 24, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28447235/prevalence-of-musculoskeletal-diseases-in-a-semi-urban-nigerian-community-results-of-a-cross-sectional-survey-using-copcord-methodology
#4
Uhunmwangho U Courage, Dungwom P Stephen, Imoh C Lucius, Charles Ani, Agbaji O Oche, Agaba I Emmanuel, Adelowo O Olufemi
The International League of Associations for Rheumatology (ILAR) in collaboration with the World Health Organization (WHO) initiated the Community Oriented Program for the Control of Rheumatic diseases (COPCORD) to promote the growth of rheumatology in developing countries. This is the first COPCORD-type survey carried out in a West African community. The objective of this study was to determine the prevalence of musculoskeletal diseases in a semi-urban Nigerian community, using the COPCORD methodology. This is a cross-sectional total population survey, carried out in Katon Rikkos, Jos, Nigeria, from June 2015 to November 2016...
April 26, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28446799/expanding-the-spectrum-of-skeletal-dysplasia-with-immunodeficiency-a-commentary-on-identification-of-biallelic-extl3-mutations-in-a-novel-type-of-spondylo-epi-metaphyseal-dysplasia
#5
https://www.readbyqxmd.com/read/28446029/sugar-free-pregnane-type-steroids-from-the-roots-of-cynanchum-stauntonii
#6
An-Jun Deng, Dan Zhang, Qian Li, Zhi-Hui Zhang, Zhi-Hong Li, Hai-Lin Qin
Two new sugar-free 14,15-secopregnane-type steroids, 14-O-methyl-3-epi-hirundigenin (1) and 2-deoxyamplexicogenin A (2), along with two known sugar-free pregnane-type steroids, were isolated from the 95% ethanol extract of the roots of Cynanchum stauntonii. The structures of the new compounds were characterized on the basis of extensive spectroscopic analyses, mainly 1D and 2D NMR methods, albeit the MS experiments did not display the molecular ion peaks. Compound 2 was the aglycones of stauntosides J and K, etc...
April 27, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28445063/role-of-configuration-at-c6-in-catalytic-activity-of-l-proline-derived-bifunctional-organocatalysts
#7
Hui Jin, Soo Min Cho, Juyeol Lee, Do Hyun Ryu
l-Proline-derived chiral bifunctional (thio)urea organocatalysts epi-PTU and epi-PU were newly synthesized, and their catalytic performances were compared with their C6 epimeric catalysts PTU and PU in various Michael reactions of nitrostyrene in terms of reactivities and stereoselectivities. The experimental results indicate that a proper relative stereochemistry at C2 and C6 in l-proline-derived bifunctional organocatalysts is important for successful catalysis and that catalysts (PTU and PU) with the 2S,6R configuration are much more efficient...
April 26, 2017: Organic Letters
https://www.readbyqxmd.com/read/28444853/experimental-type-2-diabetes-induction-reduces-serum-vaspin-but-not-serum-omentin-in-wistar-rats
#8
Cynthia Aparecida de Castro, Karina Ana da Silva, Marina Molina Buffo, Karina Nogueira Zambone Pinto, Fernanda de Oliveira Duarte, Keico Okino Nonaka, Fernanda de Freitas Aníbal, Ana Cláudia Garcia de Oliveira Duarte
Vaspin and omentin are adipose tissue adipokines that have often been related to obesity and its comorbidities. The aim of this study was to investigate the behaviour of serum omentin and vaspin in models of type 2 diabetes. To do this, Wistar rats (~200 g) were randomly divided into two groups: a non-diabetic group (n = 6) and a diabetic group fed on a high-fat diet (n = 6) and a low dose of streptozotocin (Sigma(®) ). All procedures were approved by the Brazilian Ethics Committee. Body weight (BW) and food intake were recorded daily...
April 25, 2017: International Journal of Experimental Pathology
https://www.readbyqxmd.com/read/28443676/pre-operative-nomograms-for-predicting-renal-function-at-1-year-after-partial-nephrectomy
#9
Cheuk Fan Shum, Clinton D Bahler, Clint Cary, Timothy A Masterson, Ronald S Boris, Thomas A Gardner, Hristos Z Kaimakliotis, Rick Foster, Richard Bihrle, Michael Koch, James E Slaven, Chandru P Sundaram
INTRODUCTION: Partial nephrectomy (PN) reduces the risk of post-operative chronic renal insufficiency (CRI). However, some patients still develop CRI after PN, and may eventually require dialysis. Being able to predict renal function before PN helps in counseling patients and managing expectations. We aimed to construct nomograms that predict estimated glomerular filtration rate (eGFR), defined by the Modification of Diet in Renal Disease (MDRD) and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formulae, at one year after PN, using only pre-operative covariates as predictors...
April 26, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28440575/divergent-total-syntheses-of-huperzine-q-lycopladine-b-lycopladine-c-and-4-epi-lycopladine-d
#10
Xiaoguang Lei, Benke Hong, Dachao Hu, Jinbao Wu, Jing Zhang, Houhua Li
We report herein our synthetic efforts towards the divergent syntheses of (-)-huperzine Q (1), (+)-lycopladines B (2), C (3) and (-)-lycopladine D (4). The 10-step total synthesis of (-)-huperzine Q (1) and the first total syntheses of (+)-lycopladines B (2) and C (3) have been accomplished via a series of cascade reactions. Our approach features a Michael addition/aldol/intramolecular C-alkylation sequence to forge the 6/9 spirocycle ring followed by an ethylene-accelerated carbonyl-olefin metathesis to construct the common 6/5/9 ring system...
April 25, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28438799/erratum-for-gonz%C3%A3-lez-herrera-et-al-simvastatin-attenuates-endothelial-activation-through-15-epi-lipoxin-a4-production-in-murine-chronic-chagas-cardiomyopathy
#11
Fabiola González-Herrera, Allysson Cramer, Pollyana Pimentel, Christian Castillo, Ana Liempi, Ulrike Kemmerling, Fabiana S Machado, Juan D Maya
No abstract text is available yet for this article.
May 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28438711/can-transverse-relaxation-rates-in-deep-gray-matter-be-approximated-from-functional-and-t2-weighted-flair-scans-for-relative-brain-iron-quantification
#12
Benjamín Garzón, Rouslan Sitnikov, Lars Bäckman, Grégoria Kalpouzos
Alterations in iron concentration in certain deep gray matter regions are known to occur in aging and several clinical conditions. In vivo measurements of R2(∗) transverse relaxation rates and quantitative susceptibility mapping (QSM) have been shown to be strongly correlated with iron concentration in tissue, but their calculation requires the acquisition of a multi-echo gradient recalled echo sequence (MGRE). In the current study, we examined the feasibility of approximating R2(∗) rates using metrics derived from fMRI-EPI and T2-weighted FLAIR images, which are widely available...
April 21, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28438709/characterization-of-high-resolution-gradient-echo-and-spin-echo-epi-for-fmri-in-the-human-visual-cortex-at-7t
#13
Catarina Rua, Mauro Costagli, Mark R Symms, Laura Biagi, Graziella Donatelli, Mirco Cosottini, Alberto Del Guerra, Michela Tosetti
The increased signal-to-noise ratio (SNR) offered by functional Magnetic Resonance Imaging (fMRI) at 7T allows the acquisition of functional data at sub-millimetric spatial resolutions. However, simply reducing partial volume effects is not sufficient to precisely localize task-induced activation due to the indirect mechanisms that relate brain function and the changes in the measured signal. In this work T2* and T2 weighted Echo Planar Imaging (EPI) schemes based on Gradient Recalled Echo (GRE) and Spin Echo (SE) were evaluated in terms of temporal SNR, percent signal change, contrast to noise ratio (CNR), activation volume, and sensitivity and specificity to gray matter...
April 21, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28438666/how-to-choose-the-right-mr-sequence-for-your-research-question-at-7-t-and-above
#14
José P Marques, David G Norris
The choice of a pulse sequence at ultra-high field can be influenced by a number of considerations and constraints that are not always the same as those at lower fields. Foremost amongst these is of course the information required and the time available, but considerations of static main field- and transmit field- inhomogeneities as well as power deposition can also play an important role. In this review we first briefly examine the characteristics of high field MRI, and then describe the performance and constraints relevant to the major imaging readouts, and their implementation with parallel imaging techniques...
April 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28438214/predictors-of-job-satisfaction-among-nurses-working-in-ethiopian-public-hospitals-2014-institution-based-cross-sectional-study
#15
Ayele Semachew, Tefera Belachew, Temamen Tesfaye, Yohannes Mehretie Adinew
BACKGROUND: Nurses play a pivotal role in determining the efficiency, effectiveness, and sustainability of health care systems. Nurses' job satisfaction plays an important role in the delivery of quality health care. There is paucity of studies addressing job satisfaction among nurses in the public hospital setting in Ethiopia. Thus, this study aimed to assess job satisfaction and factors influencing it among nurses in Jimma zone public hospitals, southwestern Ethiopia. METHODS: An institution-based census was conducted among 316 nurses working in Jimma zone public hospitals from March to April, 2014...
April 24, 2017: Human Resources for Health
https://www.readbyqxmd.com/read/28436701/two-cytotoxic-6-7-seco-spiro-lacton-ent-kauranoids-from-isodon-rubescens
#16
Guo-Yong Luo, Rui Deng, Jing-Jie Zhang, Jiang-Hai Ye, Lu-Tai Pan
The present study was performed to investigate the chemical components of the branches and leaves of Isodon rubescens. Two 6,7-seco-spiro-lacton-ent-kauranoids were obtained. Based on the extensive spectroscopic analyses, their structures were elucidated as 6-epi-11-O-acetylangustifolin (1) and 11-O-acetylangustifolin (2), respectively. The structure of 2 was further comfirmed by X-ray crystallography analysis. MTT method was employed to evaluate their cytotoxity against human lung cancer cell lines A549 and leukemia cell lines K562...
April 24, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28434703/glomerular-filtration-rate-estimation-in-people-older-than-85-comparison-between-ckd-epi-mdrd-idms-and-bis1-equations
#17
Fernando Bustos-Guadaño, José Luis Martín-Calderón, Juan José Criado-Álvarez, Raquel Muñoz-Jara, Adolfo Cantalejo-Gutiérrez, María Concepción Mena-Moreno
BACKGROUND: The evidence of glomerular filtration rate (GFR) estimating with serum creatinine based formulae in the elderly population is scarce. The purpose of this study is to compare CKD-EPI, MRD4-IDMS and BIS1 equations to analyse correlation and concordance in a population older than 85 years old. PATIENTS AND METHODS: We designed a retrospective cross-sectional study, which included data from 600 patients older than 85 years. GFR was estimated by the following equations: CKD-EPI, MDR4-IDMS and BIS1, using as variables sex, age and serum creatinine concentration...
March 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/28434010/dynamic-analysis-of-kidney-function-and-its-correlation-with-nutritional-indicators-in-a-large-sample-of-hospitalized-elderly-patients
#18
Li Qingping, Wei Ribao, Wang Yang, Su Tingyu, Yang Xi, Huang Mengjie, Miao Hui, Chen Xiangmei
BACKGROUND The aim of this study was to analyze changes in kidney function and its correlation with nutritional metabolism indicators in hospitalized elderly patients in a large medical center over the past 7 years. MATERIAL AND METHODS The renal function of patients over 60 years old in the Chinese PLA General Hospital in 2008, 2011, and 2014 were comparatively analyzed. The hemoglobin, serum albumin, triglycerides, cholesterol, uric acid, and urea nitrogen data were collected and used as the nutritional metabolism indicators...
April 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28432796/an-acetone-based-phantom-for-quantitative-diffusion-mri
#19
Xiaoke Wang, Scott B Reeder, Diego Hernando
PURPOSE: To propose and evaluate an acetone-D2 O phantom that has an extended range of apparent diffusion coefficient (ADC) for quantitative diffusion magnetic resonance imaging (MRI), as well as to compare its properties to previously described water-based phantoms. MATERIALS AND METHODS: The proposed acetone-D2 O, and previously described sucrose water solution and polyvinylpyrrolidone (PVP) water solution phantoms, were constructed in a number of concentrations between 0% and 50%...
April 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28431600/assessment-of-on-treatment-platelet-reactivity-and-relationship-with-cerebral-micro-embolic-signals-in-asymptomatic-and-symptomatic-carotid-stenosis
#20
Justin A Kinsella, W Oliver Tobin, Sean Tierney, Timothy M Feeley, Bridget Egan, Tara Coughlan, D Ronan Collins, Desmond O'Neill, Joseph A Harbison, Colin P Doherty, Prakash Madhavan, Dermot J Moore, Sean M O'Neill, Mary-Paula Colgan, Maher Saqqur, Raymond P Murphy, Niamh Moran, George Hamilton, Dominick J H McCabe
INTRODUCTION: The relationship between on-treatment platelet reactivity and cerebral micro-embolic signals (MES) is unknown, and has not been previously simultaneously assessed in asymptomatic and symptomatic carotid stenosis patients. METHODS: Consecutive eligible patients with ≥50% asymptomatic or recently symptomatic carotid stenosis (≤4weeks following TIA/ischaemic stroke) were recruited to this pilot study. Symptomatic patients were followed up to the 'late' phase (≥3months) following symptom onset or carotid intervention; longitudinal data were analysed from symptomatic patients with data available at both time-points...
May 15, 2017: Journal of the Neurological Sciences
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