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https://www.readbyqxmd.com/read/28731544/localized-mrs-reliability-of-in-vivo-glutamate-at-3%C3%A2-t-in-shortened-scan-times-a-feasibility-study
#1
J Eric Jensen, Randy P Auerbach, Angela Pisoni, Diego A Pizzagalli
Glutamate is the prime excitatory neurotransmitter in the mammalian brain and has been implicated in a wide range of psychiatric conditions. To improve the applicability and clinical reach of magnetic resonance spectroscopy (MRS), research is needed to develop shortened, yet reliable, MRS scanning procedures for standard 1.5-3-T clinical magnetic resonance imaging (MRI) systems, particularly with young or vulnerable populations unable to tolerate longer protocols. To this end, we evaluated the test-retest reliability of a shortened J-resolved MRS sequence in healthy adolescents (n = 22) aged 12-14 years...
July 21, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28730951/penumbra-and-re-canalization-acute-computed-tomography-in-ischemic-stroke-evaluation-practise-study-protocol
#2
Salwa El-Tawil, Joanna Wardlaw, Ian Ford, Grant Mair, Tom Robinson, Lalit Kalra, Keith W Muir
Rationale Multimodal imaging, including computed tomography angiography and computed tomography perfusion imaging, yields additional information on intracranial vessels and brain perfusion and can differentiate between ischemic core and penumbra which may affect patient selection for intravenous thrombolysis. Hypothesis The use of multimodal imaging will increase the number of patients receiving intravenous thrombolysis and lead to better treatment outcomes. Sample size 400 patients. Methods and design PRACTISE is a prospective, multicenter, randomized, controlled trial in which patients presenting within 4...
August 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28730493/magnetic-resonance-spectroscopy-mrs-based-methods-for-examining-cancer-metabolism-in-response-to-oncogenic-kinase-drug-treatment
#3
Yuen-Li Chung
Magnetic resonance spectroscopy (MRS) is an analytical technique that has been extensively used to examine reprogrammed metabolism and treatment response in cancer cells and solid tumors both in vivo and ex vivo. High-resolution MRS (HR-MRS) is one of the best methods for metabolic profiling, as it is highly quantitative, robust, and reproducible. The protocols for dual-phase extraction of cancer cells and tumors and sample preparations for high-resolution (1)H and (31)P HR-MRS analysis are described here. Descriptions of spectra acquisition and analysis are also included in this chapter...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28724648/mass-scaling-of-metabolic-rates-in-carabid-beetles-carabidae-the-importance-of-phylogeny-regression-models-and-gas-exchange-patterns
#4
Agnieszka Gudowska, Bartosz W Schramm, Marcin Czarnoleski, Andrzej Antoł, Ulf Bauchinger, Jan Kozłowski
The origin of the allometric relationship between standard metabolic rate (MR) and body mass (M), often described as MR=aM (b) , remains puzzling and interpretation of the mass-scaling exponent, b may depend on the methodological approach, shapes of residuals, coefficient of determination (r(2) ) and sample size. We investigated the mass scaling of MRs within and between species of Carabidae beetles. We used ordinary least squares (OLS) regression, phylogenetically generalized least squares (PGLS) regression and standardized major axis (SMA) regression to explore the effects of different model-fitting methods and data clustering caused by phylogenetic clades (grade shift) and gas exchange patterns (discontinuous, cyclic and continuous)...
July 19, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28724598/cystometrography-of-meningitis-retention-syndrome
#5
Yuji Tanaka, Kazuo Satomi
Although the combination of acute urinary retention and aseptic meningitis has not been well recognised, this combination can be referred to as meningitis-retention syndrome (MRS). We report a case of MRS with urodynamic follow-up. A 29-year-old man developed fever and headache, and after 7 days, he developed sudden urinary retention. Neurological examination indicated stiff neck, hyper-reflexes of the lower extremities. Cerebrospinal fluid examination showed mononuclear leucocytosis, increased protein level...
July 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28724585/effect-of-gluten-free-diet-on-cerebellar-mr-spectroscopy-in-gluten-ataxia
#6
Marios Hadjivassiliou, Richard A Grünewald, David S Sanders, Priya Shanmugarajah, Nigel Hoggard
OBJECTIVE: To evaluate the effect of gluten free diet (GFD) on magnetic resonance spectroscopy (MRS) of the cerebellum in patients with gluten ataxia (GA). METHODS: Patients with GA, defined as sporadic ataxia with positive antigliadin antibodies in the absence of an alternative cause, routinely undergo MRS at baseline and after the introduction of GFD as part of their clinical care. We present our experience of the effect of GFD on MRS of the cerebellum. RESULTS: A total of 117 consecutive patients with GA were included in this report...
July 19, 2017: Neurology
https://www.readbyqxmd.com/read/28724545/magnetic-resonance-spectroscopy-in-preterm-infants-association-with-neurodevelopmental-outcomes
#7
Reina Hyodo, Yoshiaki Sato, Miharu Ito, Yuichiro Sugiyama, Chikako Ogawa, Hisashi Kawai, Toshiki Nakane, Akiko Saito, Akihiro Hirakawa, Hiroyuki Kidokoro, Jun Natsume, Masahiro Hayakawa
OBJECTIVE: To compare magnetic resonance spectroscopy (MRS) metabolite ratios in preterm infants at term-equivalent age with those in term infants and to evaluate the association between MRS metabolites and neurodevelopmental outcomes at 18 months corrected age in preterm infants. DESIGN: We studied infants born at a gestational age <37 weeks and weighing <1500 g during 2009-2013 using MRS at term-equivalent age. Infants with major brain abnormalities were excluded...
July 19, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28724170/circulating-insulin-like-growth-factor-1-and-insulin-like-growth-factor-binding-protein-3-predict-three-months-outcome-after-ischemic-stroke
#8
Moritz Armbrust, Hans Worthmann, Reinhard Dengler, Helmut Schumacher, Ralf Lichtinghagen, Christoph Cyrill Eschenfelder, Matthias Endres, Martin Ebinger
Reports on neuroprotective effects of Insulin-like growth factor-1 (IGF-1) and Insulin-like growth factor binding protein-3 (IGFBP-3) in ischemic brain tissue are inconsistent. The aim of this study was to determine if plasma levels of IGF-1 and IGFBP-3 in acute stroke patients are indicative of 3 months functional outcome. Plasma levels were measured via chemiluminescence immunoassay in heparin blood samples of patients included in the EARLY trial (NCT00562588). Plasma samples were drawn on admission and 8 days post-stroke...
July 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28723710/controlled-attenuation-parameter-and-mr-spectroscopy-measured-liver-steatosis-are-discordant-in-hiv-infected-adults-with-high-body-mass
#9
Jennifer C Price, Jennifer L Dodge, Yifei Ma, Rebecca Scherzer, Natalie Korn, Kyle Tillinghast, Marion G Peters, Susan Noworolski, Phyllis C Tien
OBJECTIVE: Hepatic steatosis (HS) is common in HIV-infected individuals. Magnetic resonance spectroscopy (MRS) is the preferred non-invasive method for HS measurement but is expensive. Controlled attenuation parameter (CAP) also assesses HS and is conveniently performed concomitantly with transient elastography. We aimed to assess the accuracy of CAP in the setting of HIV infection. DESIGN: Cross-sectional study. METHODS: CAP and MRS were performed in 82 subjects (39 HIV-monoinfected;7 HCV-monoinfected;21 HIV/HCV-coinfected; 15 with neither infection)...
July 18, 2017: AIDS
https://www.readbyqxmd.com/read/28721046/brain-metabolite-values-in-children-with-breath-holding-spells
#10
Mustafa Calik, Dilek Sen Dokumaci, Suna Sarikaya, Mahmut Demir, Ilhan Isik, Halil Kazanasmaz, Cemil Kaya, Hasan Kandemir
Breath-holding spells are benign, paroxysmal events with apnea and postural tone changes after a crying episode in infants. The objective of this study was to investigate the pathologies in brain metabolite values in the absence of seizure in children with breath-holding spells by using magnetic resonance spectroscopy (MRS). Brain MRS examination was performed on 18 children with breath-holding spells and 13 neurologically normal children who were included as the control group. There was no significant difference in terms of N-acetyl aspartate (NAA), choline (Cho), creatine (Cr), and myoinositol (mI) levels and also in terms of NAA/Cr, Cho/Cr, and mI/Cr ratios between the patients and the control group (all P>0...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28716717/big-gaba-edited-mr-spectroscopy-at-24-research-sites
#11
Mark Mikkelsen, Peter B Barker, Pallab K Bhattacharyya, Maiken K Brix, Pieter F Buur, Kim M Cecil, Kimberly L Chan, David Y-T Chen, Alexander R Craven, Koen Cuypers, Michael Dacko, Niall W Duncan, Ulrike Dydak, David A Edmondson, Gabriele Ende, Lars Ersland, Fei Gao, Ian Greenhouse, Ashley D Harris, Naying He, Stefanie Heba, Nigel Hoggard, Tun-Wei Hsu, Jacobus F A Jansen, Alayar Kangarlu, Thomas Lange, R Marc Lebel, Yan Li, Chien-Yuan E Lin, Jy-Kang Liou, Jiing-Feng Lirng, Feng Liu, Ruoyun Ma, Celine Maes, Marta Moreno-Ortega, Scott O Murray, Sean Noah, Ralph Noeske, Michael D Noseworthy, Georg Oeltzschner, James J Prisciandaro, Nicolaas A J Puts, Timothy P L Roberts, Markus Sack, Napapon Sailasuta, Muhammad G Saleh, Michael-Paul Schallmo, Nicholas Simard, Stephan P Swinnen, Martin Tegenthoff, Peter Truong, Guangbin Wang, Iain D Wilkinson, Hans-Jörg Wittsack, Hongmin Xu, Fuhua Yan, Chencheng Zhang, Vadim Zipunnikov, Helge J Zöllner, Richard A E Edden
Magnetic resonance spectroscopy (MRS) is the only biomedical imaging method that can noninvasively detect endogenous signals from the neurotransmitter γ-aminobutyric acid (GABA) in the human brain. Its increasing popularity has been aided by improvements in scanner hardware and acquisition methodology, as well as by broader access to pulse sequences that can selectively detect GABA, in particular J-difference spectral editing sequences. Nevertheless, implementations of GABA-edited MRS remain diverse across research sites, making comparisons between studies challenging...
July 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28714169/reliable-quantification-of-marrow-fat-content-and-unsaturation-level-using-in-vivo-mr-spectroscopy
#12
Kaipin Xu, Sigurdur Sigurdsson, Vilmundur Gudnason, Trisha Hue, Ann Schwartz, Xiaojuan Li
PURPOSE: To develop a novel technique for reliable quantification of bone marrow fat content and composition using in vivo MR spectroscopy (MRS). METHODS: An MRS quantification method combining both advantages of Voigt line shape model and time-domain analysis was developed. The proposed method was tested using computer-simulated data and in vivo data acquired at lumbar vertebral bodies of 23 subjects (age, 83.8 ± 3.7 y; male, n = 13; female, n = 10) from L1 to L4...
July 16, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28713789/screening-of-oxalate-degrading-lactic-acid-bacteria-of-food-origin
#13
Nicoletta Murru, Giuseppe Blaiotta, Maria Francesca Peruzy, Serena Santonicola, Raffaelina Mercogliano, Maria Aponte
A screening for oxalate degrading abilities was initially carried on within Lactic Acid Bacteria cultures of different food origin. Seventy-nine strains were drop-inoculated onto MRS agar plates containing calcium oxalate. By comparing colonies diameters, 31 strains were used to inoculate, in parallel, MRS and MRS modified by sodium oxalate addition. Differences in the strains' growth were assessed by colony forming unit counts. For two strains, the growth in oxalate enriched medium was significantly higher; while, for eleven strains an opposite behaviour was recorded...
April 13, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/28713330/access-to-thrombolysis-for-non-resident-and-resident-stroke-patients-a-registry-based-comparative-study-from-berlin
#14
Ludwig Schlemm, Guillaume Turc, Heinrich J Audebert, Martin Ebinger
OBJECTIVES: Stroke can happen to people away from home. It is unknown whether non-resident and resident stroke patients have equal access to thrombolysis. MATERIALS AND METHODS: Consecutive patients cared for by the Stroke Emergency Mobile between 2011 and 2016 after prompting suspicion of acute stroke during the emergency call were included in our registry. Patients were categorized as residents or non-residents based on their main address. Clinical characteristics, thrombolysis rates, and time intervals from symptom onset/last seen well to alarm and to thrombolysis were compared between groups adjusting for age, pre-stroke modified Rankin Scale (mRS) score, and National Institutes of Health Stroke Scale (NIHSS) score...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28713087/clinical-factors-related-to-post-stroke-fatigue-within-the-first-3-month-after-acute-cerebrovascular-events
#15
Iryna I Delva, Mykhaylo Y Delva, Volodymyr A Poltorapavlov
INTRODUCTION: Post-stroke fatigue (PSF) is a common stroke complication with long-term negative consequences. AIM: Assess the rates of certain PSF domains within first 3 months after different acute cerebrovascular events (ACE) and identify clinical factors associated with each PSF domain. MATERIAL AND METHODS: There were examined 285 patients (195 with ischemic strokes, 39 with hemorrhagic strokes and 51 with transient ischemic attacks (TIA)) consequently at hospital stay, in 1 month and in 3 months after ACE...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28712992/proton-and-multinuclear-magnetic-resonance-spectroscopy-in-the-human-brain-at-ultra-high-field-strength-a-review
#16
Anke Henning
Magnetic Resonance Spectroscopy (MRS) allows for a non-invasive and non-ionizing determination of in vivo tissue concentrations and metabolic turn-over rates of more than 20 metabolites and compounds in the central nervous system of humans. The aim of this review is to give a comprehensive overview about the advantages, challenges and advances of ultra-high field MRS with regard to methodological development, discoveries and applications from its beginnings around 15 years ago up to the current state. The review is limited to human brain and spinal cord application at field strength of 7T and 9...
July 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28712957/secretory-expression-of-%C3%AE-mannanase-from-bacillus-circulans-nt-6-7-in-lactobacillus-plantarum
#17
Kwankanit Intaratrukul, Sunee Nitisinprasert, Thu-Ha Nguyen, Dietmar Haltrich, Suttipun Keawsompong
The β-mannanase gene of Bacillus circulans NT 6.7 was successfully cloned in Lactobacillus plantarum WCFS1 using the pSIP403 expression vector and secreted to the supernatant rather than accumulated in the cells. The highest activity was achieved by controlling the pH at 6 during cultivation. Maximum mannanase activities detected in the supernatant and cell-free extract of 200 ml MRS broth were 8.2 and 0.86 U/ml, respectively. Enzyme activity in the supernatant increased to 27 U/ml by fermentation in a 5-L bioreactor with automatic pH control...
July 13, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28712909/comparison-of-grading-scales-regarding-perioperative-complications-and-clinical-outcomes-of-brain-arteriovenous-malformations-after-endovascular-therapy-a-multicenter-study
#18
Hengwei Jin, Yuhua Jiang, Huijian Ge, Jing Luo, Conghui Li, Hongxing Wu, Youxiang Li
OBJECTIVES: Several scales have been proposed for risk assessment and outcome determination in brain arteriovenous malformations (bAVMs) treated by endovascular therapy. We aim to validate and compare the efficacy of these scales in predicting perioperative complications and clinical outcomes. METHODS: We retrospectively reviewed bAVM patients who underwent endovascular therapy at 4 centers in China from January 2012 to December 2015. The primary outcomes were complications, unfavorable outcome (mRS≥3) and complete obliteration...
July 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28712897/safety-and-efficacy-of-a-600mg-loading-dose-of-clopidogrel-24-hours-before-pipeline-embolization-device-treatment
#19
Elias Atallah, Hassan Saad, Kimon Bekelis, Nohra Chalouhi, Stavropoula Tjoumakaris, David Hasan, Hekmat Zarzour, Michelle Smith, Robert H Rosenwasser, Pascal Jabbour
BACKGROUND: Clopidogrel/aspirin antiplatelet therapy is routinely administered 7 to 10 days prior to pipeline aneurysm treatment. Our study assessed the safety and efficacy of a 600mg loading dose of clopidogrel 24 hours before PED treatment. METHODS: We performed a retrospective cohort study involving patients treated with pipeline from October 2010 to May 2016. 39.7%(n=158) patients were dispensed a loading dose of 650mg of aspirin plus at least 600mg of clopidogrel 24 hours preceding PED deployment; 60...
July 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28712618/would-a-large-tpa-trial-for-those-4-5-to-6-0-hours-from-stroke-onset-be-good-value-for-information
#20
Djøra I Soeteman, Nicolas A Menzies, Ankur Pandya
OBJECTIVES: To quantify the potential value of new research in patients treated with thrombolytic treatment (tissue-type plasminogen activator [tPA]) in the 4.5- to 6.0-hour time window after stroke onset and to determine the optimal size of a future trial using value of information analysis. METHODS: Expected value of partial perfect and sample information (EVPPI and EVSI) analyses were conducted using a probabilistic Markov model. Data for modified Rankin Scale (mRS) distributions in patients 4...
July 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
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