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https://www.readbyqxmd.com/read/28730493/magnetic-resonance-spectroscopy-mrs-based-methods-for-examining-cancer-metabolism-in-response-to-oncogenic-kinase-drug-treatment
#1
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/28712992/proton-and-multinuclear-magnetic-resonance-spectroscopy-in-the-human-brain-at-ultra-high-field-strength-a-review
#2
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/28695243/cns-metabolism-in-high-risk-drug-abuse-insights-gained-from-1-h-31-p-mrs-and-pet
#3
REVIEW
S Bodea
BACKGROUND: High-risk drug consumption is a matter of great concern for public health actors in industrialised countries. The latest trends show a market tendency towards diversification and increasing demand for high-purity synthetic drugs. While most consumers seek medical help after cannabis use, it is high-risk drugs like cocaine, heroin and amphetamines that account for most of the 1000 drug-related deaths that occur in Germany every year. PURPOSE: This article presents the most prominent in vivo cerebral metabolic information in cocaine, heroin and methamphetamine users provided by MRI spectroscopy and PET imaging...
July 10, 2017: Der Radiologe
https://www.readbyqxmd.com/read/28679377/methionyl-trna-synthetase-overexpression-is-associated-with-poor-clinical-outcomes-in-non-small-cell-lung-cancer
#4
Eun Young Kim, Ji Ye Jung, Arum Kim, Kwangsoo Kim, Yoon Soo Chang
BACKGROUND: Methionyl-tRNA synthetase (MRS) plays a critical role in initiating translation by transferring Met to the initiator tRNA (tRNAi(Met)) and protection against ROS-mediated damage, suggesting that its overexpression is related to cancer growth and drug resistance. In this study, the clinical implication of MRS expression in non-small cell lung cancer (NSCLC) was evaluated. METHODS: Immunoblot and immunohistochemical (IHC) analyses were performed using tissue lysates and formalin-fixed paraffin embedded (FFPE) tissue blocks from wild type C57BL/6, LSL-Kras G12D, and LSL-Kras G12D:p53(fl/fl) mice...
July 5, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28667365/a-high-urgency-stroke-code-reduces-in-hospital-delays-in-acute-ischemic-stroke-a-single-centre-experience
#5
Paolo Candelaresi, P Lattuada, C Uggetti, R Daccò, G Fontana, F Frediani
Timely treatment is essential in acute ischemic stroke as the chances of recovery diminish over time, so efforts are necessary to streamline in-hospital pathways and reduce delays. Here, we analyse the interventions to reduce door-to-needle time in stroke patients suitable for intravenous thrombolysis at the Emergency Department of San Carlo Borromeo Hospital, Milan, Italy. All stroke patients consecutively treated with intravenous thrombolysis at our centre from January 1, 2013 to December 31, 2015 were included in this analysis...
June 30, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28651886/investigation-of-uch-l1-levels-in-ischemic-stroke-intracranial-hemorrhage-and-metabolic-disorder-induced-impaired-consciousness
#6
Ihsan Yigit, Metin Atescelik, Mustafa Yilmaz, Mehmet Cagri Goktekin, Mehtap Gurger, Nevin Ilhan
OBJECTIVE: We aimed to determine the levels of ubiquitin C-terminal hydrolase-L1 (UCH-L1) in patients admitted to the emergency department with impaired consciousness due to metabolic or neurological reasons. MATERIALS - METHODS: The study included 80 patients with ischemic stroke (IS), 40 patients with intracranial hemorrhage (ICH), 80 patients with metabolic disorder induced impaired consciousness (MDIC) and 40 healthy controls. RESULTS: The levels of UCH-L1 [median (IQR)] were as follows: 5...
June 21, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28638945/surgical-treatment-of-unruptured-distal-basilar-artery-aneurysm-durability-and-risk-factors-for-neurological-worsening
#7
Hidetoshi Matsukawa, Hiroyasu Kamiyama, Takanori Miyazaki, Yu Kinoshita, Toshiyuki Tsuboi, Kosumo Noda, Nakao Ota, Norihiro Saito, Rihee Takeda, Sadahisa Tokuda, Rokuya Tanikawa
BACKGROUND: Distal basilar artery aneurysms (DBAs) consist of basilar apex and basilar artery-superior cerebellar artery bifurcation (BA-SCA) aneurysms. The authors aimed to investigate clinical and radiological differences between two locations and to evaluate the 12-month surgical outcome in unruptured DBAs. METHODS: Fifty-six consecutive patients who underwent surgical treatment (37 basilar apex and 19 BA-SCA aneurysms) between April 2012 and February 2016 were retrospectively evaluated...
June 21, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28633562/advances-in-imaging-brain-metabolism
#8
Fahmeed Hyder, Douglas L Rothman
Metabolism is central to neuroimaging because it can reveal pathways by which neuronal and glial cells use nutrients to fuel their growth and function. We focus on advanced magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) methods used in brain metabolic studies. (17)O-MRS and (31)P-MRS, respectively, provide rates of oxygen use and ATP synthesis inside mitochondria, whereas (19)F-MRS enables measurement of cytosolic glucose metabolism. Calibrated functional MRI (fMRI), an advanced form of fMRI that uses contrast generated by deoxyhemoglobin, provides maps of oxygen use that track neuronal firing across brain regions...
June 21, 2017: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/28629575/outcome-of-patients-with-proximal-vessel-occlusion-of-the-anterior-circulation-and-dwi-pwi-mismatch-is-time-dependent
#9
Sibu Mundiyanapurath, Sascha Diatschuk, Sarah Loebel, Johannes Pfaff, Mirko Pham, Markus Alfred Möhlenbruch, Wolfgang Wick, Martin Bendszus, Peter A Ringleb, Alexander Radbruch
BACKGROUND AND PURPOSE: Patients with ischemic stroke and large vessel occlusion are assumed to benefit from endovascular therapy (ET) independent of the symptom onset-to-treatment time (OTT) if they present with a mismatch of diffusion- and perfusion-weighted imaging (DWI-PWI mismatch). We aimed at studying the influence of OTT on clinical outcome in these patients. METHODS: Retrospective database review in a tertiary care university hospital. All patients presented with proximal vessel occlusion of the anterior circulation and DWI-PWI mismatch...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28627225/the-relationships-between-bnp-and-neurocardiac-injury-severity-noninvasive-cardiac-output-and-outcomes-after-aneurysmal-subarachnoid-hemorrhage
#10
Amber McAteer, Marilyn Hravnak, Yuefang Chang, Elizabeth A Crago, Matthew J Gallek, Khalil M Yousef
INTRODUCTION: Neurocardiac injury, a type of myocardial dysfunction associated with neurological insult to the brain, occurs in 31-48% of aneurysmal subarachnoid hemorrhage (aSAH) patients. Cardiac troponin I (cTnI) is commonly used to diagnose neurocardiac injury. Brain natriuretic peptide (BNP), another cardiac marker, is more often used to evaluate degree of heart failure. The purpose of this study was to examine the relationships between BNP and (a) neurocardiac injury severity according to cTnI, (b) noninvasive continuous cardiac output (NCCO), and (c) outcomes in aSAH patients...
January 1, 2017: Biological Research for Nursing
https://www.readbyqxmd.com/read/28603158/long-term-prognosis-after-extracranial-intracranial-bypass-surgery-for-symptomatic-cerebrovascular-occlusive-disease
#11
Hideki Komatani, Yuji Okamoto, Takachika Aoki, Kei Noguchi, Motohiro Morioka
Prognosis after extracranial-intracranial (EC-IC) bypass surgery has only been studied for a few years and the benefits of this procedure are still controversial. In this single-center retrospective study, we examined the long-term prognosis of patients who underwent EC-IC bypass surgery. Subjects were patients with symptomatic internal carotid artery or intracranial lesion occlusive disease who underwent EC-IC bypass surgery between 1991 and 2003. Of these, long-term prognosis was examined in 57 patients (39 male, 18 female; mean age, 61...
June 12, 2017: Kurume Medical Journal
https://www.readbyqxmd.com/read/28590405/breast-tissue-metabolism-by-magnetic-resonance-spectroscopy
#12
REVIEW
Naranamangalam R Jagannathan, Uma Sharma
Metabolic alterations are known to occur with oncogenesis and tumor progression. During malignant transformation, the metabolism of cells and tissues is altered. Cancer metabolism can be studied using advanced technologies that detect both metabolites and metabolic activities. Identification, characterization, and quantification of metabolites (metabolomics) are important for metabolic analysis and are usually done by nuclear magnetic resonance (NMR) or by mass spectrometry. In contrast to the magnetic resonance imaging that is used to monitor the tumor morphology during progression of the disease and during therapy, in vivo NMR spectroscopy is used to study and monitor tumor metabolism of cells/tissues by detection of various biochemicals or metabolites involved in various metabolic pathways...
June 7, 2017: Metabolites
https://www.readbyqxmd.com/read/28583636/metabolic-profile-of-liver-damage-in-non-cirrhotic-virus-c-and-autoimmune-hepatitis-a-proton-decoupled-31-p-mrs-study
#13
Antti Hakkarainen, Lauri Puustinen, Reetta Kivisaari, Sonja Boyd, Urpo Nieminen, Perttu Arkkila, Nina Lundbom
PURPOSE: To study liver (31)P MRS, histology, transient elastography, and liver function tests in patients with virus C hepatitis (HCV) or autoimmune hepatitis (AIH) to test the hypothesis that (31)P MR metabolic profile of these diseases differ. MATERIALS AND METHODS: 25 patients with HCV (n=12) or AIH (n=13) underwent proton decoupled (31)P MRS spectroscopy performed on a 3.0T MR imager. Intensities of phosphomonoesters (PME) of phosphoethanolamine (PE) and phosphocholine (PC), phosphodiesters (PDE) of glycerophosphoethanolamine (GPE) and glycerophosphocholine (GPC), and γ, α and β resonances of adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH) were determined...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28572496/effect-of-age-diet-and-tissue-type-on-pcr-response-to-creatine-supplementation
#14
Marina Yazigi Solis, Guilherme Giannini Artioli, Maria Concepción García Otaduy, Cláudia da Costa Leite, Walquiria Arruda, Raquel Ramos Veiga, Bruno Gualano
Creatine/phosphorylcreatine (PCr) responses to creatine supplementation may be modulated by age, diet and tissue, but studies assessing this possibility are lacking. Therefore, we aimed to determine whether the PCr responses vary as a function of age, diet, and tissue. Fifteen children, 17 omnivorous and 14 vegetarian adults, and 18 elderly participated in this study. Participants were given placebo and subsequently creatine (0.3 g•kg(-1)•day(-1)) for 7 days in a single-blind fashion. PCr was measured through phosphorus magnetic resonance spectroscopy ((31)P-MRS) in muscle and brain...
June 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28560829/dynamic-phosphocreatine-imaging-with-unlocalized-ph-assessment-of-the-human-lower-leg-muscle-following-exercise-at-3t
#15
Oleksandr Khegai, Guillaume Madelin, Ryan Brown, Prodromos Parasoglou
PURPOSE: To develop a high temporal resolution imaging method that measures muscle-specific phosphocreatine (PCr) resynthesis time constant (τPCr ) and pH changes in muscles of the lower leg following exercise on a clinical 3T MRI scanner. METHODS: We developed a frequency-selective 3D non-Cartesian FLORET sequence to measure PCr with 17-mm nominal isotropic resolution (28 mm actual resolution) and 6-s temporal resolution to capture dynamic metabolic muscle activity...
May 30, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28551292/clinical-outcomes-of-patients-with-acute-basilar-artery-occlusion-in-brazil-an-observational-study
#16
Francisco Antunes Dias, Frederico Fernandes Alessio-Alves, Luis Henrique Castro-Afonso, Pedro Telles Cougo, Clara Monteiro Antunes Barreira, Millene Rodrigues Camilo, Guilherme Seizem Nakiri, Daniel Giansante Abud, Octavio Marques Pontes-Neto
BACKGROUND: Intravenous thrombolysis (IVT) and endovascular therapy (EVT) were proven safe and effective for anterior circulation proximal occlusions. However, the most appropriate recanalization strategy in patients with acute basilar artery occlusion (BAO) is still controversial. This study aimed to assess outcomes of patients with BAO at an academic stroke center in Brazil. METHODS: This is a retrospective analysis of consecutive patients with BAO from a prospective stroke registry at Ribeirão Preto Medical School...
May 24, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28549111/diabetic-db-db-mice-do-not-develop-heart-failure-upon-pressure-overload-a-longitudinal-in-vivo-pet-mri-and-mrs-study-on-cardiac-metabolic-structural-and-functional-adaptations
#17
Desiree Abdurrachim, Miranda Nabben, Verena Hoerr, Michael T Kuhlmann, Philipp Bovenkamp, Jolita Ciapaite, Ilvy M E Geraets, Will Coumans, Joost J F P Luiken, Jan F C Glatz, Michael Schäfers, Klaas Nicolay, Cornelius Faber, Sven Hermann, Jeanine J Prompers
Aim: Heart failure is associated with altered myocardial substrate metabolism and impaired cardiac energetics. Comorbidities like diabetes may influence the metabolic adaptations during heart failure development. We quantified to what extent changes in substrate preference, lipid accumulation, and energy status predict the longitudinal development of hypertrophy and failure in the non-diabetic and the diabetic heart. Methods and results: Transverse aortic constriction (TAC) was performed in non-diabetic ( db /+) and diabetic ( db/db ) mice to induce pressure overload...
May 26, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28544208/ultra-high-field-magnetic-resonance-spectroscopy-in-non-alcoholic-fatty-liver-disease-novel-mechanistic-and-diagnostic-insights-of-energy-metabolism-in-non-alcoholic-steatohepatitis-and-advanced-fibrosis
#18
Stefan Traussnigg, Christian Kienbacher, Martin Gajdošík, Ladislav Valkovič, Emina Halilbasic, Judith Stift, Christian Rechling, Harald Hofer, Petra Steindl-Munda, Peter Ferenci, Fritz Wrba, Siegfried Trattnig, Martin Krššák, Michael Trauner
BACKGROUND & AIMS: With the rising prevalence of non-alcoholic fatty liver disease (NAFLD) and steatohepatitis (NASH) non-invasive tools obtaining pathomechanistic insights to improve risk stratification are urgently needed. We therefore explored high- and ultra-high-field magnetic resonance spectroscopy (MRS) to obtain novel mechanistic and diagnostic insights into alterations of hepatic lipid, cell membrane and energy metabolism across the spectrum of NAFLD. METHODS: MRS and liver biopsy were performed in 30 NAFLD patients with NAFL (n=8) or NASH (n=22)...
April 24, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28540565/radiological-exams-on-end-stage-oncologic-patients-before-hospice-admission
#19
Elena Belloni, Stefania Tentoni, Alessandra Cella, Davide Cassinelli, Raffaella Bertè, Paola Scagnelli
PURPOSE: To evaluate frequency, type, and cost of diagnostic and interventional radiological exams performed on end-stage oncologic patients in the 90 days before Hospice admission. MATERIALS AND METHODS: Data of patients admitted to Hospice from January 2012 through June 2013 (18 months) were cross-checked with data from the digital archive of the Radiology Department. Frequency and type of exams performed before admission were analyzed across three 1-month periods, namely M-3, M-2, M-1, corresponding to 90-61, 60-31 and 30-1 days before admission...
May 25, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28521774/correlation-of-cell-free-dna-plasma-concentration-with-severity-of-non-alcoholic-fatty-liver-disease
#20
Thomas Karlas, Lara Weise, Stephanie Kuhn, Felix Krenzien, Matthias Mehdorn, David Petroff, Nicolas Linder, Alexander Schaudinn, Harald Busse, Volker Keim, Johann Pratschke, Johannes Wiegand, Katrin Splith, Moritz Schmelzle
BACKGROUND: The assessment of fibrosis and inflammatory activity is essential to identify patients with non-alcoholic fatty liver disease (NAFLD) at risk for progressive disease. Serum markers and ultrasound-based methods can replace liver biopsy for fibrosis staging, whereas non-invasive characterization of inflammatory activity remains a clinical challenge. Cell-free DNA (cfDNA) is a novel non-invasive biomarker for assessing cellular inflammation and cell death, which has not been evaluated in NAFLD...
May 19, 2017: Journal of Translational Medicine
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