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https://www.readbyqxmd.com/read/28208302/real-time-monitoring-atp-in-mitochondrion-of-living-cells-a-specific-fluorescent-probe-for-atp-by-dual-recognition-sites
#1
Kai-Yue Tan, Chun-Yan Li, Yong-Fei Li, Junjie Fei, Bin Yang, Ya-Jun Fu, Fang Li
Adenosine triphosphate (ATP) is mainly produced in the mitochondrion and used as a universal energy source for various cellular events. Various fluorescent probes for ATP have been established successfully, but most of them are not appropriate for monitoring the fluctuation of the mitochondrial ATP level. Herein, a fluorescent probe named Mito-Rh is first synthesized and used to recognize ATP in mitochondrion. In the probe, rhodamine, diethylenetriamine, and triphenylphosphonium are selected as fluorophore, reaction site, and mitochondrion-targeting group, respectively...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28205643/optical-switching-using-transition-from-dipolar-to-charge-transfer-plasmon-modes-in-ge2sb2te5-bridged-metallodielectric-dimers
#2
Arash Ahmadivand, Burak Gerislioglu, Raju Sinha, Mustafa Karabiyik, Nezih Pala
Capacitive coupling and direct shuttling of charges in nanoscale plasmonic components across a dielectric spacer and through a conductive junction lead to excitation of significantly different dipolar and charge transfer plasmon (CTP) resonances, respectively. Here, we demonstrate the excitation of dipolar and CTP resonant modes in metallic nanodimers bridged by phase-change material (PCM) sections, material and electrical characteristics of which can be controlled by external stimuli. Ultrafast switching (in the range of a few nanoseconds) between amorphous and crystalline phases of the PCM section (here Ge2Sb2Te5 (GST)) allows for designing a tunable plasmonic switch for optical communication applications with significant modulation depth (up to 88%)...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28202246/analysis-of-myocardial-perfusion-parameters-in-an-ex-vivo-porcine-heart-model-using-third-generation-dual-source-ct
#3
Gert Jan Pelgrim, Taylor M Duguay, J Marco A Stijnen, Akos Varga-Szemes, Sjoerd Van Tuijl, U Joseph Schoepf, Matthijs Oudkerk, Rozemarijn Vliegenthart
PURPOSE: To evaluate the relationship between fractional flow reserve (FFR)-determined coronary artery stenosis severity and myocardial perfusion parameters derived from dynamic myocardial CT perfusion imaging (CTP) in an ex-vivo porcine heart model. METHODS: Six porcine hearts were perfused according to Langendorff. Circulatory parameters such as arterial blood flow (ABF) (L/min), mean arterial pressure (MAP) (mmHg) and heart rate (bpm) were monitored. Using an inflatable cuff and monitored via a pressure wire, coronary artery stenoses of different FFR grades were created (no stenosis, FFR = 0...
February 3, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28198820/predicting-short-term-survival-after-liver-transplantation-on-eight-score-systems-a-national-report-from-china-liver-transplant-registry
#4
Qi Ling, Haojiang Dai, Runzhou Zhuang, Tian Shen, Weilin Wang, Xiao Xu, Shusen Zheng
To compare the performance of eight score systems (MELD, uMELD, MELD-Na. iMELD, UKELD, MELD-AS, CTP, and mCTP) in predicting the post-transplant mortality, we analyzed the data of 6,014 adult cirrhotic patients who underwent liver transplantation between January 2003 and December 2010 from the China Liver Transplant Registry database. In hepatitis B virus (HBV) group, MELD, uMELD and MELD-AS showed good predictive accuracies at 3-month mortality after liver transplantation; by comparison with other five models, MELD presented the best ability in predicting 3-month, 6-month and 1-year mortality, showing a significantly better predictive ability than UKELD and iMELD...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28187903/the-influence-of-trocar-fenestration-and-volume-on-connective-tissue-progenitor-cells-stem-cells-in-arthroscopic-bone-marrow-aspiration-from-the-proximal-humerus
#5
Andreas Voss, Mary Beth McCarthy, Hardeep Singh, Knut Beitzel, Jessica DiVenere, Mark P Cote, Alexander R Hoberman, Michael Nowak, Andreas B Imhoff, Augustus D Mazzocca
PURPOSE: To evaluate the number of connective tissue progenitor cells (CTPs) and nucleated cells obtained during bone marrow aspiration (BMA) from the proximal humerus using either a fenestrated or a nonfenestrated trocar and determine differences in varying amounts of aspiration volume. The first hypothesis was that the number of CTPs extracted with the fenestrated trocar would be greater due to its potential to extract more cells through its fenestrations. The second hypothesis was that using consecutive aspirations with either trocar would provide a consistent number of CTPs and nucleated cells throughout the aspiration with no significant decrease of cells at the end...
February 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28180928/safety-and-efficacy-of-sodium-tetradecyl-sulfate-and-lipiodol-foam-in-balloon-occluded-retrograde-transvenous-obliteration-brto-for-large-porto-systemic-shunts
#6
Amar Mukund, Ganesh Deogaonkar, S Rajesh, Saggerre Muralikrishna Shasthry, Shiv Kumar Sarin
OBJECTIVE: To evaluate the safety and efficacy sodium tetradecyl sulfate and lipiodol foam (STS foam) in BRTO for large (caliber ≥15 mm) porto-systemic shunt and gastric fundal varices. MATERIALS AND METHODS: It is a retrospective record-based study of patients who underwent BRTO using STS foam at the Institute of Liver and Biliary Sciences, New Delhi, for gastric variceal bleed or refractory hepatic encephalopathy (HE) who had large porto-systemic shunt (diameter ≥15 mm) with or without associated gastric varices...
February 8, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28174234/ct-perfusion-as-an-early-biomarker-of-treatment-efficacy-in-advanced-ovarian-cancer-an-acrin-and-gog-study
#7
Chaan Ng, Zheng Zhang, Susanna I Lee, Helga S Marques, Kyle Burgers, Feng Su, Joseph Bauza, Robert S Mannel, Joan Walker, Warner K Huh, Stephen C Rubin, Paul DiSilvestro, Lainie P Martin, John K Chan, Michael A Bookman, Robert L Coleman, Ting-Yim Lee
PURPOSE: ACRIN 6695 was a feasibility study investigating whether CT perfusion (CTP) biomarkers are associated with progression-free survival at 6 months (PFS-6) in patients with advanced ovarian cancer who were treated with carboplatin and either dose-dense (weekly) or conventional (3-weekly) paclitaxel, with optional bevacizumab in the prospective phase III GOG-0262 trial. EXPERIMENTAL DESIGN: ACRIN 6695 recruited participants with residual disease after primary cytoreductive surgery or planned interval cytoreduction following neoadjuvant therapy, to undergo CTP studies before (T0), 3-weeks (T1) and 4-weeks (T2) after chemotherapy initiation...
February 7, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28171804/hemodynamic-and-neuro-monitoring-for-neurocritically-ill-patients-an-international-survey-of-intensivists
#8
Sanjeev Sivakumar, Fabio S Taccone, Mohammed Rehman, Holly Hinson, Neeraj Naval, Christos Lazaridis
PURPOSE: To investigate multimodality systemic and neuro-monitoring practices in acute brain injury (ABI) and to analyze differences among "neurointensivists" (NI; clinical practice comprised >1/3 by neurocritical care), and other intensivists (OI). METHODS: Anonymous 22-question Web-based survey among physician members of SCCM and ESICM. RESULTS: Six hundred fifty-five responded (66% completion rate); 422 (65%) were OI, and 226 (35%) were NI...
January 21, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28169427/financial-incentive-does-not-affect-p300-in-response-to-certain-episodic-and-semantic-probe-stimuli-in-the-complex-trial-protocol-ctp-version-of-the-concealed-information-test-cit-in-detection-of-malingering
#9
J Peter Rosenfeld, Elena Labkovsky, Elena Davydova, Anne Ward, Lauren Rosenfeld
Previous research indicated that the skin conductance response of the autonomic nervous system in the Concealed Information Test (CIT) is typically increased in subjects who are financially and otherwise incentivized to defeat the CIT (the paradoxical "motivational impairment" effect). This is not the case for RT-based CITs, nor P300 tests based on the three-stimulus protocol for detection of cognitive malingering (although these are not the same as CITs). The present report is the first attempt to study the effect of financial motivation on the P300-based Complex Trial Protocol using both episodic and semantic memory probe and irrelevant stimuli...
February 7, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28164118/multislice-analysis-of-blood-flow-values-in-ct-perfusion-studies-of-lung-cancer
#10
Silvia Malavasi, Domenico Barone, Giampaolo Gavelli, Alessandro Bevilacqua
Objectives. Tumour heterogeneity represents a key issue in CT perfusion (CTp), where all studies are usually based on global mean or median values of perfusion maps, often computed on whole tumour. We sought to determine whether, and to what extent, such global values can be representative of tumour heterogeneity, with respect to single slices, and could be used for therapy assessment. Materials and Methods. Twelve patients with one primary non-small cell lung cancer lesion were enrolled in this study, for a total amount of 26 CTp examinations and 118 slices...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28154829/hba1c-based-score-model-for-predicting-death-risk-in-patients-with-hepatocellular-carcinoma-and-type-2-diabetes-mellitus
#11
Lingling He, Shuan Zhang, Xiaoli Liu, Yuyong Jiang, Xianbo Wang, Zhiyun Yang
Aim. To establish a new score model to predict risk of death in patients with hepatocellular carcinoma and type 2 diabetes mellitus. Methods. This was a retrospective study of 147 patients with hepatocellular carcinoma and type 2 diabetes mellitus who came to Beijing Ditan Hospital between October 2008 and June 2013. Univariate and multivariate logistic regression analysis was performed to obtain the independent factors associated with death risk. A new score model was devised according to these factors. Results...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28153767/hybrid-modeling-of-microbial-exopolysaccharide-eps-production-the-case-of-enterobacter-a47
#12
Rodolfo Marques, Moritz von Stosch, Rui M C Portela, Cristiana A V Torres, Sílvia Antunes, Filomena Freitas, Maria A M Reis, Rui Oliveira
Enterobacter A47 is a bacterium that produces high amounts of a fucose-rich exopolysaccharide (EPS) from glycerol residue of the biodiesel industry. The fed-batch process is characterized by complex non-linear dynamics with highly viscous pseudo-plastic rheology due to the accumulation of EPS in the culture medium. In this paper, we study hybrid modeling as a methodology to increase the predictive power of models for EPS production optimization. We compare six hybrid structures that explore different levels of knowledge-based and machine-learning model components...
January 30, 2017: Journal of Biotechnology
https://www.readbyqxmd.com/read/28151705/biomarkers-of-tobacco-exposure-summary-of-an-fda-sponsored-public-workshop
#13
Cindy M Chang, Selvin Edwards, Aarthi Arab, Arseima Del Valle-Pinero, Ling Yang, Dorothy K Hatsukami
Since 2009, the United States (U.S.) Food and Drug Administration (FDA) Center for Tobacco Products (CTP) has had the authority to regulate the manufacturing, distribution, and marketing of tobacco products in order to reduce the death and disease caused by tobacco use. Biomarkers of exposure pertain to actual human exposure to chemicals arising from tobacco use and could play an important role across a number of FDA regulatory activities, including assessing new and modified risk tobacco products and identifying and evaluating potential product standards...
November 9, 2016: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28135785/changes-in-cardiac-output-and-incidence-of-volume-overload-in-cirrhotics-receiving-20-albumin-infusion
#14
Saggere Muralikrishna Shasthry, Manoj Kumar, Jelen Singh Khumuckham, Shiv Kumar Sarin
Cirrhotic patients are prone to develop volume over load, have increased capillary permeability and latent or overt cardiomyopathy. Whether albumin infusion causes volume overload in cirrhotics has not been adequately studied PATIENTS AND METHODS: Ninety nine consecutive cirrhotic patients receiving 1gm per kg albumin infusion were evaluated for development of volume overload. Clinical, echocardiographic and hemodynamic changes were closely monitored during and after albumin infusion RESULTS: Thirty (30.30%) patients developed volume overload...
January 30, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28130886/classification-of-hemodynamically-significant-stenoses-from-dynamic-ct-perfusion-and-cta-myocardial-territories
#15
Marco Giordano, Dirk H J Poot, Adriaan Coenen, Theo van Walsum, Michela Tezza, Koen Nieman, Wiro J Niessen
PURPOSE: Myocardial blood flow (MBF) obtained by dynamic CT perfusion (CTP) has been recently introduced to assess hemodynamic significance of coronary stenosis in coronary artery disease. The diagnostic performance of dynamic CTP MBF is limited due to subjective interpretation of MBF maps and MBF variations caused by physiological, methodological and technical issues. In this paper we introduce a novel method to quantify the hypoperfused volume (HPV) in myocardial territories derived from CT angiography (CTA) in order to overcome the limitations of current dynamic CTP MBF analysis methods...
January 28, 2017: Medical Physics
https://www.readbyqxmd.com/read/28129985/safety-and-efficacy-of-pitolisant-on-cataplexy-in-patients-with-narcolepsy-a-randomised-double-blind-placebo-controlled-trial
#16
Zoltan Szakacs, Yves Dauvilliers, Vladimir Mikhaylov, Irina Poverennova, Sergei Krylov, Slavko Jankovic, Karel Sonka, Philippe Lehert, Isabelle Lecomte, Jeanne-Marie Lecomte, Jean-Charles Schwartz
BACKGROUND: Histaminergic neurons are crucial to maintain wakefulness, but their role in cataplexy is unknown. We assessed the safety and efficacy of pitolisant, a histamine H3 receptor inverse agonist, for treatment of cataplexy in patients with narcolepsy. METHODS: For this randomised, double-blind, placebo-controlled trial we recruited patients with narcolepsy from 16 sleep centres in nine countries (Bulgaria, Czech Republic, Hungary, Macedonia, Poland, Russia, Serbia, Turkey, and Ukraine)...
January 24, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28107416/validation-of-a-modified-child-turcotte-pugh-classification-system-utilizing-insulin-like-growth-factor-1-for-patients-with-hepatocellular-carcinoma-in-an-hbv-endemic-area
#17
Dong Hyeon Lee, Jeong-Hoon Lee, Yong Jin Jung, Jungsoo Gim, Won Kim, Byeong Gwan Kim, Kook Lae Lee, Yuri Cho, Jeong-Ju Yoo, Minjong Lee, Young Youn Cho, Eun Ju Cho, Su Jong Yu, Yoon Jun Kim, Jung-Hwan Yoon
BACKGROUND: Recently, a modified insulin-like growth factor-1 (IGF)-Child-Turcotte-Pugh (CTP) classification was proposed to improve the original CTP classification. This study aimed to validate the new IGF-CTP classification system as a prognostic maker for patients with hepatocellular carcinoma (HCC) in a hepatitis B virus endemic area. METHODS: We conducted a post-hoc analysis of a prospective cohort study. We used Harrell's C-index and U-statistics to compare the prognostic performance of both IGF-CTP and CTP classifications for overall survival...
2017: PloS One
https://www.readbyqxmd.com/read/28089233/epicardial-adipose-tissue-and-myocardial-ischemia-assessed-by-computed-tomography-perfusion-imaging-and-invasive-fractional-flow-reserve
#18
Rahul G Muthalaly, Nitesh Nerlekar, Dennis T L Wong, James D Cameron, Sujith K Seneviratne, Brian S Ko
BACKGROUND: Epicardial adipose tissue (EAT) is a metabolically active fat depot that is associated with incident coronary artery disease (CAD) and major adverse cardiovascular events. The relationship between EAT and myocardial ischemia remains unclear. This study investigated the relationship between EAT volume and the presence of perfusion defects on myocardial computed tomographic perfusion imaging (CTP) and functional stenoses on invasive fractional flow-reserve (FFR). METHODS: Data were obtained from a previous prospective cross-sectional study in patients with suspected CAD...
January 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28086792/irish-general-practitioner-attitudes-toward-decriminalisation-and-medical-use-of-cannabis-results-from-a-national-survey
#19
Des Crowley, Claire Collins, Ide Delargy, Eamon Laird, Marie Claire Van Hout
BACKGROUND: Governmental debate in Ireland on the de facto decriminalisation of cannabis and legalisation for medical use is ongoing. A cannabis-based medicinal product (Sativex®) has recently been granted market authorisation in Ireland. This unique study aimed to investigate Irish general practitioner (GP) attitudes toward decriminalisation of cannabis and assess levels of support for use of cannabis for therapeutic purposes (CTP). METHODS: General practitioners in the Irish College of General Practitioner (ICGP) database were invited to complete an online survey...
January 13, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28077270/instructions-to-suppress-semantic-memory-enhances-or-has-no-effect-on-p300-in-a-concealed-information-test-cit
#20
J Peter Rosenfeld, Anne Ward, Jesse Drapekin, Elena Labkovsky, Samuel Tullman
The present study investigated the extent to which people can suppress semantic memory as indexed with the P300 ERP and the autobiographical implicit association test (aIAT). In EXP 1, participants (22) were run in a counterbalanced repeated measures study in both simply knowledgeable (SK) and knowledgeable with suppression (SP) conditions. A P300-based, concealed information test ("Complex Trial Protocol"; CTP) with a 50/50 Target/Nontarget (T/NT) ratio was given both with and without instructions to suppress semantic memories...
January 7, 2017: International Journal of Psychophysiology
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