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https://www.readbyqxmd.com/read/29789170/method-selectivity-evaluation-using-the-co-feature-ratio-in-lc-ms-metabolomics-comparison-of-hilic-stationary-phase-performance-for-the-analysis-of-plasma-urine-and-cell-extracts
#1
Albert Elmsjö, Jakob Haglöf, Mikael K R Engskog, Ida Erngren, Marika Nestor, Torbjörn Arvidsson, Curt Pettersson
Evaluation of the chromatographic separation in metabolomics studies has primarily been done using preselected sets of standards or by counting the number of detected features. An alternative approach is to calculate each feature's co-feature ratio, which is a combined selectivity measurement for the separation (i.e. extent of co-elution) and the MS-signal (i.e. adduct formation and in-source fragmentation). The aim of this study was to demonstrate how the selectivity of different HILIC stationary phases can be evaluated using the co-feature ratio approach...
May 4, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29777332/influence-of-tetanic-stimulation-on-the-staircase-phenomenon-and-the-acceleromyographic-time-course-of-neuromuscular-block-a-randomized-controlled-trial
#2
Guido Mazzinari, Carlos L Errando, Oscar Díaz-Cambronero, Manuel Martin-Flores
During neuromuscular monitoring, repeated electrical stimulation evokes muscle responses of increasing magnitude ('staircase phenomenon', SP). We aimed to evaluate whether SP affects time course and twitches' values of an acceleromyographic assessed neuromuscular block with or without previous tetanic stimulation. Fifty adult patients were randomized to receive a 50 Hz tetanic stimulus (S group) or not (C group) before monitor calibration. After 20 min of TOF ratio (TOFr) stimulation rocuronium was administered...
May 18, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29767292/short-axis-diastolic-ventricular-area-ratio-as-a-new-index-in-screening-patients-with-repaired-tetralogy-of-fallot
#3
Dala Zakaria, Sean Lang, Mallikarjuna Rettiganti, Jeffrey M Gossett, Elijah Bolin, R Thomas Collins
Right ventricular (RV) end-diastolic volume measured by cardiovascular magnetic resonance imaging (CMR) is a criterion for pulmonary valve replacement in patients with tetralogy of Fallot (TOF). We sought to determine if the ratio of echocardiographic, short-axis RV-to-left ventricular (LV) end-diastolic areas (EDA) could be used to predict RV volume on CMR. We retrospectively reviewed the echocardiograms of all patients with repaired TOF who underwent CMR at our institution from 2011 to 2015 and also had an echocardiogram within 6 months of the CMR...
May 16, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29762136/evaluation-of-a-clinical-tof-pet-detector-design-that-achieves-%C3%A2-100-ps-coincidence-time-resolution
#4
Joshua W Cates, Craig S Levin
Commercially available clinical positron emission tomography (PET) detectors employ scintillation crystals that are long (20 mm length) and narrow (4-5 mm width) optically coupled on their narrow end to a photosensor. The aspect ratio of this traditional crystal rod conguration and 511 keV photon attenuation properties yield signicant variances in scintillation light collection efficiency and transit time to the photodetector, due to variations in the 511 keV photon interaction depth in the crystal. These variances contribute significantly to coincidence time resolution degradation...
May 15, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29760475/computed-tomography-for-evaluating-right-ventricle-and-pulmonary-artery-in-pediatric-tetralogy-of-fallot-correlation-with-post-operative-pulmonary-regurgitation
#5
Yue Gao, Zhi-Gang Yang, Ke Shi, Kai-Yue Diao, Hua-Yan Xu, Ying-Kun Guo
Pulmonary regurgitation (PR) is the most common complication after tetralogy of Fallot (TOF) surgical repair, and long-term PR might result in cardiovascular events. The aim of this study was to assess the influence of pre-operative right ventricle (RV) and pulmonary artery (PA) parameters assessed by dual-source computed tomography on post-operative PR. A total of 41 TOF patients who underwent trans-valve surgical repair were retrospectively recruited. The RV and PA parameters evaluated by pre-operative DSCT were compared between the PR and non-PR groups...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29758349/habitual-aerobic-exercise-gene-apoa5-named-rs662799-snp-and-response-of-blood-lipid-and-lipoprotein-phenotypes-among-older-chinese-adult
#6
Xiangyun Liu, Guoyuan Huang, Zhanbin Niu, Yuqin Wei, Ru Wang
BACKGROUND: The genetic component of dyslipidemia has been studied in adults but little in older population. It is remains unknown regarding influence and interaction of APOA5 gene single nucleotide polymorphism (SNP) and habitual aerobic exercise (HAE) on changes of blood lipids and lipoprotein phenotypes in older Chinese adults. METHODS: Four-hundred-twenty-three old Chinese individuals with HAE were divided into hyperlipidemia and normal groups. We genotyped polymorphic loci using matrix assisted laser desorption ionization time of flight mass spectrometry detection technology (MALDI-TOF)...
May 11, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29755575/waist-hip-ratio-related-genetic-loci-are-associated-with-risk-of-impaired-fasting-glucose-in-chinese-children-a-case-control-study
#7
Qi-Ying Song, Xiang-Rui Meng, Anke Hinney, Jie-Yun Song, Tao Huang, Jun Ma, Hai-Jun Wang
Background: The meta-analyses of genome-wide association studies identified several waist-hip ratio (WHR) related loci in individuals of European ancestry. Since the pattern of fat distribution and the relationship between fat distribution and glucose metabolism disturbance in Chinese are different from those in Europeans, the present study aimed to explore the individual and cumulative effects of WHR-related loci on glycemic phenotypes in Chinese children. Methods: A total of 2030 children were recruited from two independent studies...
2018: Nutrition & Metabolism
https://www.readbyqxmd.com/read/29753092/sex-differences-for-major-congenital-heart-defects-in-down-syndrome-a-population-based-study
#8
Michele Santoro, Alessio Coi, Isabella Spadoni, Fabrizio Bianchi, Anna Pierini
BACKGROUND: Down syndrome (DS) is the most common autosomal chromosomal anomaly in liveborn infants. About 40% of infants with DS have a major congenital heart defect (CHD). Among them, atrioventricular septal defects (AVSD), atrial septal defects (ASD), ventricular septal defect (VSD) and Tetralogy of Fallot (ToF) are the most common. The aim of this study was to estimate the sex difference in the occurrence of CHD in infants with DS comparing it with non-DS infants. METHOD: Live birth cases of DS diagnosed by the first year of life were extracted from the Registry of Congenital Anomalies of Tuscany (2003-2015 period)...
May 9, 2018: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29751077/procyanidin-b2-protects-against-d-galactose-induced-mimetic-aging-in-mice-metabolites-and-microbiome-analysis
#9
Ying Xiao, Jialin Dong, Zhiting Yin, Qiguo Wu, Yiming Zhou, Xiaoli Zhou
To elucidate the possible mechanisms for the preventive effect of procyanidin B2 on aging, a combined analysis of metabolic profile and gut microbiome was carried out in the present study. The mimetic aged mice induced by d-galactose injection (500 mg/kg, sc daily), and the preventive group was fed with the diet plus 0.2% procyanidin B2. After 7 weeks of treatment, the spatial memory was assayed using the Morris water maze test. Procyanidin B2 significantly ameliorated the impaired memory and antioxidant abilities induced by d-galactose...
May 8, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29750765/ideal-and-actual-impact-of-rapid-diagnostic-testing-and-antibiotic-stewardship-on-antibiotic-prescribing-and-clinical-outcomes-in-children-with-positive-blood-cultures
#10
Caroline H Reuter, Hannah L Palac, Larry K Kociolek, Xiaotian T Zheng, Yusuf Y Chao, Rupal Patel, Sameer J Patel
BACKGROUND: Implementing matrix assisted laser desorption ionization time of flight (MALDI-TOF) and multiplex PCR (mPCR) has been associated with decreased mortality and hospital length of stay in adults, but the impact in pediatrics is less understood. METHODS: This pre-post quasi-experimental study compared antibiotic prescribing for positive blood cultures in patients ≤21 years collected in 2012 (pre-intervention) and in 2015 (after MALDI-TOF/mPCR). Time to effective and optimal antimicrobial therapy were evaluated using Cox proportional hazards regression...
May 10, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29744278/proteomic-identification-of-marker-proteins-and-its-application-to-authenticate-ophiocordyceps-sinensis
#11
Xinxin Tong, Yixuan Wang, Zhengyao Xue, Lu Chen, Yi Qiu, Jing Cao, Cheng Peng, Jinlin Guo
Ophi o cordyceps sinensis ( O. sinensis ) is a highly valuable fungus because of its nutritious and medicinal properties. The objective of this study was to identify protein markers using a proteomics approach followed by the development of an immunoassay to authenticate O. sinensis . Four authentic O. sinensis samples collected from four production regions and four counterfeit samples were examined individually. Overall 22 characteristic proteins of O. sinensis were identified by two-dimensional electrophoresis (2-DE) coupled with the matrix-assisted laser desorption/ionization-time-of-light mass spectrometry (MALDI-TOF/MS)...
May 2018: 3 Biotech
https://www.readbyqxmd.com/read/29724195/bioactive-components-and-mechanisms-of-chinese-poplar-propolis-alleviates-oxidized-low-density-lipoprotein-induced-endothelial-cells-injury
#12
Huasong Chang, Wenwen Yuan, Haizhu Wu, Xusheng Yin, Hongzhuan Xuan
BACKGROUND: Propolis, a polyphenol-rich natural product, has been used as a functional food in anti-inflammation. However, its bioactive components and mechanisms have not been fully elucidated. To discover the bioactive components and anti-inflammatory mechanism, we prepared and separated 8 subfractions from ethyl acetate extract of Chinese propolis (EACP) and investigated the mechanism in oxidized low density lipoprotein (ox-LDL) induced human umbilical vein endothelial cells (HUVECs) damage...
May 3, 2018: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29722285/optimal-neuromuscular-blocking-effects-of-remifentanil-during-tracheal-intubation-under-general-anesthesia
#13
So Young Kwon, Si Wook Chung, Jin Deok Joo
Objective This study was performed to determine the effect of the remifentanil dose on the onset time of rocuronium with electromyography. Methods This retrospective comparative study included 75 patients undergoing general anesthesia for elective surgery. Patients received lidocaine (40 mg) and propofol (2 mg/kg) followed by rocuronium (0.6 mg/kg) with either saline infusion (Group S), remifentanil at 0.5 µg/kg/minute (Group R 0.5), or remifentanil at 1.0 µg/kg/minute (Group R 1.0). Neuromuscular block was monitored by train-of-four (TOF) electromyography, and the times taken to reach TOF 0 and TOF ratio (TOFR) 25% were recorded...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29717409/synthesis-of-a-fucosylated-trisaccharide-via-transglycosylation-by-%C3%AE-l-fucosidase-from-thermotoga-maritima
#14
Francisco Guzmán-Rodríguez, Sergio Alatorre-Santamaría, Lorena Gómez-Ruiz, Gabriela Rodríguez-Serrano, Mariano García-Garibay, Alma Cruz-Guerrero
Fucosylated oligosaccharides, such as 2'-fucosyllactose in human milk, have important biological functions such as prebiotics and preventing infection. In this work, the effect of an acceptor substrate (lactose) and the donor substrate 4-nitrophenyl-α-L-fucopyranoside (pNP-Fuc) on the synthesis of a fucosylated trisaccharide was studied in a transglycosylation reaction using α-L-fucosidase from Thermotoga maritima. Conducting a matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS), it was demonstrated that synthesized oligosaccharide corresponded to a fucosylated trisaccharide, and high-performance liquid chromatography (HPLC) of the hydrolyzed compound confirmed it was fucosyllactose...
May 2, 2018: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/29700728/improved-quantitative-dynamic-range-of-time-of-flight-mass-spectrometry-by-simultaneously-waveform-averaging-and-ion-counting-data-acquisition
#15
Yosuke Kawai, Toshinobu Hondo, Kirk R Jensen, Michisato Toyoda, Kentaro Terada
Two different types of data acquisition methods, "averaging mode" and "ion-counting mode", have been used in a time-of-flight (TOF) mass spectrometry. The most common method is an averaging mode that sums waveform signals obtained from each flight cycle. While it is possible to process many ions arriving at the same TOF in one flight cycle, low-abundance ions are difficult to measure because ion signals are overwhelmed by noises from the detection system. An ion-counting mode is suitable for the detection of such low-concentration ions, but counting loss occurs when two or more ions arrive at the detector within the dead time of the acquisition system...
April 26, 2018: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29693947/use-of-sugammadex-in-a-patient-with-myotonic-dystrophy-undergoing-laparoscopic-cholecystectomy
#16
Rieko Uno, Shoko Matsuda, Kohei Murao, Kumiko Nakamura, Michiyo Shirakawa, Koh Shingu
A 37-year-old female patient with myotonic dystrophy was scheduled for laparoscopic cholecystectomy for gall stone under general anesthesia with continuous propofol infusion. Rocuronium was administered with careful monitoring using TOF- Watch®, measuring train-of-four count (Tc), TOF ratio (Tr), and posttetanic count The total amount of rocuronium was 70 mg ; 0.6 mg .kg⁻1 for anesthetic induction and 0.3 mg .kg⁻1 when Tc exceeded 1. When the operation was completed, Tc was 4, Tr was uncountable and she showed reaction to calling her name...
May 2017: Masui. the Japanese Journal of Anesthesiology
https://www.readbyqxmd.com/read/29690754/effects-of-adenosine-receptor-agonist-on-the-rocuroniuminduced-neuromuscular-block-and-sugammadex-induced-recovery
#17
Yong Beom Kim, Sangseok Lee, Hey Ran Choi, Junyong In, Young Jin Chang, Ha Jung Kim, Young Jin Ro, Hong-Seuk Yang
Background: Several types of receptors are found at neuromuscular presynaptic membranes. Presynaptic inhibitory A1 and facilitatory A2A receptors mediate different modulatory functions on acetylcholine release. This study investigated whether adenosine A1 receptor agonist contributes to the first twitch tension (T1) of train-of-four (TOF) stimulation depression and TOF fade during rocuronium-induced neuromuscular blockade, and sugammadex-induced recovery. Methods: Phrenic nerve-diaphragm tissues were obtained from 30 adult Sprague-Dawley rats...
April 25, 2018: Korean Journal of Anesthesiology
https://www.readbyqxmd.com/read/29683008/first-trimester-combined-screening-biochemistry-in-detection-of-congenital-heart-defects
#18
Julia Alanen, Teemu Korpimaki, Heikki Kouru, Mikko Sairanen, Markku Leskinen, Mika Gissler, Markku Ryynanen, Jaana Nevalainen
OBJECTIVE: To evaluate the performance of first trimester biochemical markers, pregnancy-associated plasma protein-A (PAPP-A), free beta human chorionic gonadotropin (fβ-hCG), and nuchal translucency (NT) in detection of severe congenital heart defects (CHDs). METHODS: During the study period from 1 January 2008 to 31 December 2011, biochemical markers and NT were measured in 31,144 women as part of voluntary first trimester screening program for Down's syndrome in Northern Finland...
April 22, 2018: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29676080/-quality-evaluation-of-medicinal-herb-decoction-forsythiae-fructus
#19
Jiao Xu, Jung Chao, Yun-Tao Dai, Chao Zhu, Qi Li, Tomoda Takehisa, Dan-Dan Wang, Shi-Lin Chen
To establish the quality control methods for the standard decoction of Forsythiae Fructus. Twelve batches of representative Forsythiae Fructus were collected to prepare standard decoction of Forsythiae Fructus, and then the parameters such as extraction ratio, transfer rate of the index components and pH value of the solution were calculated to evaluate the stability of the process. The simultaneous determination method of target components and fingerprint method were established, and ultra performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS) was used to identify the main common peaks in the fingerprint to clarify the main chemical constituents in the decoction...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/29676079/-quality-evaluation-of-rhei-radix-et-rhizoma-decoction
#20
Man-Jia Zhao, Jung Chao, Yun-Tao Dai, Shi-Lin Chen, Qi Li, Zi-Quan Fan, Dan-Dan Wang, Takehisa Tomoda
Decoction of single medicinal herb is a reference for the standardization of different dosage forms of Chinese medicine and it provides a new direction for solving the problems existing in the quality of Chinese medicinal granules such as no uniform dosage form and no clear quality standard. In this paper, the quality evaluation method of standard decoction of rhubarb was established to provide reference for the quality control of common dosage forms such as clinical decoction and formula granule. 10 batches of representative Rhei Radix et Rhizoma were collected to establish UPLC fingerprints were established...
March 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
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