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magnetic resonance fingerprinting

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https://www.readbyqxmd.com/read/27929400/a-systematic-evaluation-of-blood-serum-and-plasma-pre-analytics-for-metabolomics-cohort-studies
#1
Elodie Jobard, Olivier Trédan, Déborah Postoly, Fabrice André, Anne-Laure Martin, Bénédicte Elena-Herrmann, Sandrine Boyault
The recent thriving development of biobanks and associated high-throughput phenotyping studies requires the elaboration of large-scale approaches for monitoring biological sample quality and compliance with standard protocols. We present a metabolomic investigation of human blood samples that delineates pitfalls and guidelines for the collection, storage and handling procedures for serum and plasma. A series of eight pre-processing technical parameters is systematically investigated along variable ranges commonly encountered across clinical studies...
December 5, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27889428/spectroscopic-and-e-tongue-evaluation-of-medicinal-plants-a-taste-of-how-rasa-can-be-studied
#2
Rama Jayasundar, Somenath Ghatak
BACKGROUND: The use of medicinal plants in Ayurveda is based on rasa, generally taken to represent taste as a sensory perception. This chemosensory parameter plays an important role in Ayurvedic pharmacology. OBJECTIVE: The aim is to explore the use of structuro-functional information deduced from analytical techniques for the rasa-based classification of medicinal plants in Ayurveda. MATERIALS AND METHODS: Methods of differential sensing and spectroscopic metabolomics have been used in select medicinal plants from three different taste categories (sweet, pungent and multiple taste): Tribulus terrestris, Vitis vinifera and Glycyrrhiza glabra from sweet category; Piper longum, Cuminum cyminum and Capsicum annum from pungent group; Emblica officinalis with five tastes...
November 23, 2016: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/27851871/robust-sliding-window-reconstruction-for-accelerating-the-acquisition-of-mr-fingerprinting
#3
Xiaozhi Cao, Congyu Liao, Zhixing Wang, Ying Chen, Huihui Ye, Hongjian He, Jianhui Zhong
PURPOSE: To develop a method for accelerated and robust MR fingerprinting (MRF) with improved image reconstruction and parameter matching processes. THEORY AND METHODS: A sliding-window (SW) strategy was applied to MRF, in which signal and dictionary matching was conducted between fingerprints consisting of mixed-contrast image series reconstructed from consecutive data frames segmented by a sliding window, and a precalculated mixed-contrast dictionary. The effectiveness and performance of this new method, dubbed SW-MRF, was evaluated in both phantom and in vivo...
November 7, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27834866/staphylococcus-aureus-infection-reduces-nutrition-uptake-and-nucleotide-biosynthesis-in-a-human-airway-epithelial-cell-line
#4
Philipp Gierok, Manuela Harms, Karen Methling, Falko Hochgräfe, Michael Lalk
The Gram positive opportunistic human pathogen Staphylococcus aureus induces a variety of diseases including pneumonia. S. aureus is the second most isolated pathogen in cystic fibrosis patients and accounts for a large proportion of nosocomial pneumonia. Inside the lung, the human airway epithelium is the first line in defence with regard to microbial recognition and clearance as well as regulation of the immune response. The metabolic host response is, however, yet unknown. To address the question of whether the infection alters the metabolome and metabolic activity of airway epithelial cells, we used a metabolomics approach...
November 9, 2016: Metabolites
https://www.readbyqxmd.com/read/27829500/a-serum-nuclear-magnetic-resonance-based-metabolomic-signature-of-antiphospholipid-syndrome
#5
Angelica Palisi, Manuela Grimaldi, Paola Sabatini, Paola Montoro, Mario Scrima, Manuela Rodriquez, Anna Maria D'Ursi
Antiphospholipid syndrome (APS) is a rheumatic inflammatory chronic autoimmune disease inducing hypercoagulable state associated with vascular thrombosis and pregnancy loss in women. Cardiac, cerebral and vascular strokes in these patients are responsible for reduction in life expectancy. Timely diagnosis and accurate monitoring of disease are decisive to improve the accuracy of therapy. In the present work, we present a NMR-based metabolomic study of blood sera of APS patients. Our data show that individuals suffering APS have a characteristic metabolomic profile with abnormalities associated to the metabolism of methyl group donors, ketone bodies and amino acids...
January 30, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27824358/you-say-prefrontal-cortex-and-i-say-anterior-cingulate-meta-analysis-of-spatial-overlap-in-amygdala-to-prefrontal-connectivity-and-internalizing-symptomology
#6
H A Marusak, M E Thomason, C Peters, C Zundel, F Elrahal, C A Rabinak
Connections between the amygdala and medial prefrontal cortex (mPFC) are considered critical for the expression and regulation of emotional behavior. Abnormalities in frontoamygdala circuitry are reported across several internalizing conditions and associated risk factors (for example, childhood trauma), which may underlie the strong phenotypic overlap and co-occurrence of internalizing conditions. However, it is unclear if these findings converge on the same localized areas of mPFC or adjacent anterior cingulate cortex (ACC)...
November 8, 2016: Translational Psychiatry
https://www.readbyqxmd.com/read/27790751/repeatability-of-magnetic-resonance-fingerprinting-t1-and-t2-estimates-assessed-using-the-ismrm-nist-mri-system-phantom
#7
Yun Jiang, Dan Ma, Kathryn E Keenan, Karl F Stupic, Vikas Gulani, Mark A Griswold
PURPOSE: The purpose of this study was to evaluate accuracy and repeatability of T1 and T2 estimates of a MR fingerprinting (MRF) method using the ISMRM/NIST MRI system phantom. METHODS: The ISMRM/NIST MRI system phantom contains multiple compartments with standardized T1 , T2 , and proton density values. Conventional inversion-recovery spin echo and spin echo methods were used to characterize the T1 and T2 values in the phantom. The phantom was scanned using the MRF-FISP method over 34 consecutive days...
October 27, 2016: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/27777928/cervicovaginal-fluid-acetate-a-metabolite-marker-of-preterm-birth-in-symptomatic-pregnant-women
#8
Emmanuel Amabebe, Steven Reynolds, Victoria Stern, Graham Stafford, Martyn Paley, Dilly O C Anumba
Changes in vaginal microbiota that is associated with preterm birth (PTB) leave specific metabolite fingerprints that can be detected in the cervicovaginal fluid (CVF) using metabolomics techniques. In this study, we characterize and validate the CVF metabolite profile of pregnant women presenting with symptoms of threatened preterm labor (PTL) by both (1)H-nuclear magnetic resonance spectroscopy (NMR) and enzyme-based spectrophotometry. We also determine their predictive capacity for PTB, singly, and in combination, with current clinical screening tools - cervicovaginal fetal fibronectin (FFN) and ultrasound cervical length (CL)...
2016: Frontiers in Medicine
https://www.readbyqxmd.com/read/27765209/cultivar-classification-of-apulian-olive-oils-use-of-artificial-neural-networks-for-comparing-nmr-nir-and-merceological-data
#9
Giulio Binetti, Laura Del Coco, Rosa Ragone, Samanta Zelasco, Enzo Perri, Cinzia Montemurro, Raffaele Valentini, David Naso, Francesco Paolo Fanizzi, Francesco Paolo Schena
The development of an efficient and accurate method for extra-virgin olive oils cultivar and origin authentication is complicated by the broad range of variables (e.g., multiplicity of varieties, pedo-climatic aspects, production and storage conditions) influencing their properties. In this study, artificial neural networks (ANNs) were applied on several analytical datasets, namely standard merceological parameters, near-infra red data and (1)H nuclear magnetic resonance (NMR) fingerprints, obtained on mono-cultivar olive oils of four representative Apulian varieties (Coratina, Ogliarola, Cima di Mola, Peranzana)...
March 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27760442/metabolomics-guided-isolation-of-anti-trypanosomal-metabolites-from-the-endophytic-fungus-lasiodiplodia-theobromae
#10
Nurkhalida Kamal, Christina V Viegelmann, Carol J Clements, RuAngelie Edrada-Ebel
Fungal endophytes offer diverse and unique secondary metabolites, making these organisms potential sources of promising drug leads. The application of high-resolution-liquid chromatography mass spectrometry and nuclear magnetic resonance-based metabolomics to fungal endophytes is practical in terms of dereplication studies and the mining of bioactive compounds. In this paper, we report the application of metabolomics in parallel with anti-trypanosomal assays to determine the ideal conditions for the medium-scale fermentation of the endophyte Lasiodiplodia theobromae...
October 19, 2016: Planta Medica
https://www.readbyqxmd.com/read/27746236/coexistence-of-obesity-and-asthma-determines-a-distinct-respiratory-metabolic-phenotype
#11
Mauro Maniscalco, Debora Paris, Dominique J Melck, Maria D'Amato, Anna Zedda, Matteo Sofia, Cristiana Stellato, Andrea Motta
BACKGROUND: Epidemiologic and clinical evidence supports the existence of an obesity-related asthma phenotype. No distinct pathophysiologic elements or specific biomarkers have been identified thus far, but increased oxidative stress has been reported. OBJECTIVE: We aimed at verifying whether metabolomics of exhaled breath condensate from obese asthmatic (OA) patients, lean asthmatic (LA) patients, and obese nonasthmatic (ONA) subjects could recognize specific and statistically validated biomarkers for a separate "asthma-obesity" respiratory metabolic phenotype, here defined as "metabotype...
October 14, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27720849/beneficial-effect-of-commercial-rhodiolaextract-in-rats-with-scopolamine-induced-memory-impairment-on-active-avoidance
#12
Liliya V Vasileva, Damianka P Getova, Nina D Doncheva, Andrey S Marchev, Milen I Georgiev
: Rhodiola rosea L., family Crassulaceae also known as Golden Root or Arctic root is one of the most widely used medicinal plants with effect on cognitive dysfunction, psychological stress and depression. The aim of the study was to examine the effect of a standardized commercial Rhodiola extract on learning and memory processes in naive rats as well as its effects in rats with scopolamine-induced memory impairment. MATERIALS AND METHODS: Sixty male Wistar rats were used in the study...
October 5, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27703465/using-the-disease-state-fingerprint-tool-for-differential-diagnosis-of-frontotemporal-dementia-and-alzheimer-s-disease
#13
Miguel Ángel Muñoz-Ruiz, Anette Hall, Jussi Mattila, Juha Koikkalainen, Sanna-Kaisa Herukka, Minna Husso, Tuomo Hänninen, Ritva Vanninen, Yawu Liu, Merja Hallikainen, Jyrki Lötjönen, Anne M Remes, Irina Alafuzoff, Hilkka Soininen, Päivi Hartikainen
BACKGROUND: Disease State Index (DSI) and its visualization, Disease State Fingerprint (DSF), form a computer-assisted clinical decision making tool that combines patient data and compares them with cases with known outcomes. AIMS: To investigate the ability of the DSI to diagnose frontotemporal dementia (FTD) and Alzheimer's disease (AD). METHODS: The study cohort consisted of 38 patients with FTD, 57 with AD and 22 controls. Autopsy verification of FTD with TDP-43 positive pathology was available for 14 and AD pathology for 12 cases...
May 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/27662586/limited-prolonged-effects-of-rifaximin-treatment-on-irritable-bowel-syndrome-related-differences-in-the-fecal-microbiome-and-metabolome
#14
Natalia Zeber-Lubecka, Maria Kulecka, Filip Ambrozkiewicz, Agnieszka Paziewska, Krzysztof Goryca, Jakub Karczmarski, Tymon Rubel, Wojciech Wojtowicz, Piotr Mlynarz, Lukasz Marczak, Roman Tomecki, Michal Mikula, Jerzy Ostrowski
Irritable bowel syndrome (IBS) is a chronic functional disorder and its development may be linked, directly and indirectly, to intestinal dysbiosis. Here we investigated the interactions between IBS symptoms and the gut microbiome, including the relation to rifaximin (1200 mg daily; 11.2 g per a treatment). We recruited 72 patients, including 31 with IBS-D (diarrhea), 11 with IBS-C (constipation), and 30 with IBS-M (mixed constipation and diarrhea) and 30 healthy controls (HCs). Of them, 68%, 64%, and 53% patients with IBS-D, IBS-C, and IBS-M, respectively, achieved 10-12 week-term improvement after the rifaximin treatment...
September 2, 2016: Gut Microbes
https://www.readbyqxmd.com/read/27646345/-1-h-nmr-to-explore-the-metabolome-of-exhaled-breath-condensate-in-%C3%AE-1-antitrypsin-deficient-patients-a-pilot-study
#15
Cristina Airoldi, Carlotta Ciaramelli, Marco Fumagalli, Rita Bussei, Valeria Mazzoni, Simona Viglio, Paolo Iadarola, Jan Stolk
The metabolomic analysis of exhaled breath condensate (EBC) may provide insights on both the pathology of pulmonary disorders and the response to therapy. This pilot study describes the ability of nuclear magnetic resonance (NMR)-based metabolomics to discriminate α1-antitrypsin deficient (AATD)-patients, who were diagnosed with moderate to severe emphysema, from healthy individuals. Comparative analysis of samples from these two homogeneous cohorts of individuals resulted in the generation of NMR profiles that were different from both a qualitative and a quantitative point-of-view...
October 5, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27638475/urinary-metabolic-profiling-by-1-h-nmr-spectroscopy-in-patients-with-cirrhosis-may-discriminate-overt-but-not-covert-hepatic-encephalopathy
#16
Mark J W McPhail, Sara Montagnese, Manuela Villanova, Hamza El Hadi, Piero Amodio, Mary M E Crossey, Roger Williams, I Jane Cox, Simon D Taylor-Robinson
To date urinary metabolic profiling has been applied to define a specific metabolic fingerprint of hepatocellular carcinoma on a background of cirrhosis. Its utility for the stratification of other complications of cirrhosis, such as hepatic encephalopathy (HE), remains to be established. Urinary proton nuclear magnetic resonance ((1)H-NMR) spectra were acquired and NMR data from 52 patients with cirrhosis (35 male; 17 female, median (range) age [60 (18-81) years]) and 17 controls were compared. A sub-set of 45 patients (33 male; 12 female, [60 (18-90) years, median model for end stage liver disease (MELD) score 11 (7-27)]) were fully characterised by West-Haven criteria, Psychometric Hepatic Encephalopathy Score (PHES) and electroencephalogram (EEG), and defined as overt HE (OHE, n = 21), covert HE (cHE, n = 7) or no HE (n = 17)...
September 17, 2016: Metabolic Brain Disease
https://www.readbyqxmd.com/read/27618836/gut-microbiota-metabolome-and-immune-signatures-in-patients-with-uncomplicated-diverticular-disease
#17
Giovanni Barbara, Eleonora Scaioli, Maria Raffaella Barbaro, Elena Biagi, Luca Laghi, Cesare Cremon, Giovanni Marasco, Antonio Colecchia, Gianfranco Picone, Nunzio Salfi, Francesco Capozzi, Patrizia Brigidi, Davide Festi
OBJECTIVE: The engagement of the gut microbiota in the development of symptoms and complications of diverticular disease has been frequently hypothesised. Our aim was to explore colonic immunocytes, gut microbiota and the metabolome in patients with diverticular disease in a descriptive, cross-sectional, pilot study. DESIGN: Following colonoscopy with biopsy and questionnaire phenotyping, patients were classified into diverticulosis or symptomatic uncomplicated diverticular disease; asymptomatic subjects served as controls...
September 12, 2016: Gut
https://www.readbyqxmd.com/read/27604568/temporal-dynamics-of-antidepressant-ketamine-effects-on-glutamine-cycling-follow-regional-fingerprints-of-ampa-and-nmda-receptor-densities
#18
Meng Li, Liliana Ramona Demenescu, Lejla Colic, Coraline Metzger, Hans-Jochen Heinze, Johann Steiner, Oliver Speck, Anna Fejtova, Giacomo Salvadore, Martin Walter
The anterior cingulate cortex (ACC) has shown decreased glutamate levels in patients with major depressive disorder (MDD). Subanesthetic doses of ketamine were repeatedly shown to improve depressive symptoms within 24 h after infusion and this antidepressant effect was attributed to increased AMPA throughput. To elucidate ketamine's mechanism of action, we tested if the clinical time course of the improvement is mirrored by the change of glutamine/glutamate ratio and if such effects show a regional and temporal specificity in two distinct subdivisions of ACC with different AMPA/NMDA receptor profiles...
September 8, 2016: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27545094/reconciling-local-structure-disorder-and-the-relaxor-state-in-bi1-2na1-2-tio3-batio3
#19
Pedro B Groszewicz, Melanie Gröting, Hergen Breitzke, Wook Jo, Karsten Albe, Gerd Buntkowsky, Jürgen Rödel
Lead-based relaxor ferroelectrics are key functional materials indispensable for the production of multilayer ceramic capacitors and piezoelectric transducers. Currently there are strong efforts to develop novel environmentally benign lead-free relaxor materials. The structural origins of the relaxor state and the role of composition modifications in these lead-free materials are still not well understood. In the present contribution, the solid-solution (100-x)(Bi1/2Na1/2)TiO3-xBaTiO3 (BNT-xBT), a prototypic lead-free relaxor is studied by the combination of solid-state nuclear magnetic resonance (NMR) spectroscopy, dielectric measurements and ab-initio density functional theory (DFT)...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27526996/multiparametric-imaging-with-heterogeneous-radiofrequency-fields
#20
Martijn A Cloos, Florian Knoll, Tiejun Zhao, Kai T Block, Mary Bruno, Graham C Wiggins, Daniel K Sodickson
Magnetic resonance imaging (MRI) has become an unrivalled medical diagnostic technique able to map tissue anatomy and physiology non-invasively. MRI measurements are meticulously engineered to control experimental conditions across the sample. However, residual radiofrequency (RF) field inhomogeneities are often unavoidable, leading to artefacts that degrade the diagnostic and scientific value of the images. Here we show that, paradoxically, these artefacts can be eliminated by deliberately interweaving freely varying heterogeneous RF fields into a magnetic resonance fingerprinting data-acquisition process...
2016: Nature Communications
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