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AN INTEGRATED 1H NMR, GC-MS AND HPLC-(ESI/TOF) BASED METABOLOMICS APPROACH TO THE STUDY OF ACUTE EXERCISE IN HUMAN SERUM METABOLOME

There is an increasing concern about the different response and effect that acute exercise induces on diabetic people and a novel insight into this effect can be performed using a metabolomic approach. Metabolomic is becoming widely spread used as a new and powerful tool for discerning significant changes at metabolic level. In this study we aimed to perform a non-targeted analysis and to identify metabolic differences arisen after 30 minutes of acute exercise in both young men suffering from Ty

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Nucleic Acid Reagents and Experimental Results in the NCBI Probe Database
Svetlana Iazvovskaia, Ilene Karsch Mizrachi, Kirill Rotmistrovsky, and Savani Tatake

Five years ago, the NCBI Probe database (ProbeDB) was established to provide a centralized archive of molecular probes used in biomedical applications. Currently ProbeDB contains around 10 million probes of 65 types including gene silencing agents, in situ hybridization probes, and probes for variation analysis and genome mapping. Presently, ProbeDB is the largest and most extensive database of this type available in public domain.

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Alignment of 1H-NMR data using a Generalized Fuzzy Hough Transform
Erik Alm, Leonard Csenki, Ralf J.O. Torgrip, K. Magnus Åberg, Lars I. Nord, Ina Schuppe-Koistinen and Johan Lindberg

In metabolic profiling, multivariate data analysis techniques are used to interpret 1D 1H–NMR data. Multivariate data analysis techniques require that peaks are located in the same variables in every spectrum – this requirement is not met in native NMR spectra. Current state-of-the-art alignment algorithms are unable to align peaks when the spatial order of the peaks changes. We present the Fuzzy Generalized Hough Transform alignment which solves the alignment problem.

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Alteration of urinary metabolic profile in rats treated with methylmercury
Pierre Ayotte, Dinesh Kumar, Pierre-Yves Tremblay, Xiaolei Jin, Sevini Shahbaz, Rekha Mehta, Hing Man Chan, and Oliver Fiehn

A metabolomic approach was used to detect changes in urinary metabolic profile of rats treated orally with methylmercury (MeHg), a ubiquitous fish contaminant with well known neurotoxic properties. An aliquot of urine was collected on day 14, extracted and the extract successively methoxymated and trimethylsilylated prior to analysis by GC/TOF-MS. Results indicate that several metabolic pathways were altered by MeHg treatment, including urea cycle, glutathione metabolism and amino acid degradati

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Metabolite profiling of sesquiterpene lactones and phenolics of bioactive extracts from Asteraceae medicinal plants by HPLC-UV-MS
Gobbo-Neto, L.; Silva, V.C.; Passoni, F.D.; Chagas-Paula, D.A.; Oliveira, R.B.; Da Costa, F.B.

Metabolite profiling (HPLC-UV-MS) was performed for extracts from Tithonia diversifolia (Td) and Smallanthus sonchifolius (Ss) leaves [aqueous crude (ACE); leaf rinse (LRE); 70%MeOH rinsed leaves (GFE)]. LREs presented mainly sesquiterpene lactones (SLs) and flavonoids. FGEs and ACEs presented mainly chlorogenic acids. SLs were not detected in GFEs but traces were detected in ACEs. All extracts presented anti-inflammatory potential. LREs were highly toxic while GFEs did not presented significant

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Predicting hepatotoxicity: Reactive metabolite trapping using glutathione and freshly isolated hepatocytes
Birks, V., Webber, G., Geoffroy, S., Cole, R., and Wood, S.

This poster presents our results to date using clozapine (a compound known to be associated with GSH-adduct formation) as substrate and using stable isotope GSH (GSH13C2,15N) to enhance specificity. In addition, all analyses have been conducted using an Waters Acquity UPLC-MS/MS. Results we have obtained in hepatocytes are compared against findings using human liver microsomes (HLM).

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The Human Serum Metabolome
Nick Psychogios, David Hau, Jun Peng, Igor Sinelnikov, Souhaila Bouatra, Rupasri Mandal, Ram Krishna Murthy, Jianguo Xia, Fiona Bamforth, Janet McManus, Theresa Pedersen, Russ Greiner, Bruce McManus, John Newman and David Wishart

As part of our objective to systematically characterize the human metabolome and advance the fields of quantitative metabolomics, we present a global metabolic profiling of the human serum. Our experimental results indicated that global metabolic profiling methods can routinely detect more than 4200 different compounds in serum.

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Comparison of In Vivo and In Vitro 1-H NMR Spectroscopy in the Rat Brain: Technical Considerations, Effects of Brain Regions and Post Weaning Isolation
Philippine C. Geiszler, A. Napolitano, M.I. Schubert, C.A. Jones, K.C.F. Fone, C.A. Daykin, D.P. Auer

In vivo and in vitro magnetic resonance (MR) spectroscopy are both used to obtain complementary information about the metabolic state of living tissue/tissue extracts, respectively. However, comparisons between in vivo and in vitro measurements are rare. The aim of this study was to compare results from in vivo and in vitro MR spectroscopy to study inter-regional variations and the effects of social isolation on metabolite levels in rat brain.

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Mass-Spectrometric Analysis with Sequenom EpiTYPER of GNAS Methylation in Pseudohypoparathyroydism Type Ib Patients Reveals Overall Methylation Defects also for the Familial Cases
Benedetta Izzi1, Bart Claes2, Diether Lambrechts2, Chris Van Geet1,3, Kathleen Freson1

Sequenom EpiTYPER analysis of GNAS methylation in Pseudohypoparathyroidism type Ib patients reveals overall GNAS methylation defects also for the familial cases. Such abnormalities are not detectable via old methodologies such as PCR followed by methylation specific restriction digestion and are here for the first time described.

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Showing Results 21 - 30 of 62
Scientific News
Light-activated Drug Could Reduce Side Effects of Diabetes Medication
Scientists have created a drug for type 2 diabetes that is switched on by blue light, which they hope will improve treatment of the disease.
Getting Metabolism Right
Analysis of 89 models of metabolic processes finds flaws in 44 of them — but suggests corrections.
Biologists Find An Early Sign Of Cancer
Patients show boost in certain amino acids years before diagnosis of pancreatic cancer.
Comparison of Caffeinated and Decaffeinated Coffee - Implications for Alzheimer's Disease
Researchers from the National University of Singapore successfully demonstrated the viability of GC-TOF-MS as an analytical platform for metabolomics analysis of coffee samples.
Single Enzyme is Necessary for Development of Diabetes
12-LO enzyme promotes the obesity-induced oxidative stress in the pancreatic cells.
A New Player in Lipid Metabolism Discovered
Specially engineered mice gained no weight, and normal counterparts became obese on the same high-fat, obesity-inducing Western diet.
UT Southwestern Researchers Uncover New Brain Pathways
New therapies for treating Type 2 diabetes and obesity.
Mass Spec-Based Metabolomics Workflows to Evaluate Plant Immunity
This article reviews metabolomics studies used to evaluate plant immunity with an emphasis on mass spectrometry in its many forms.
Assessing Anticancer Drugs Efficacy by Amino Acid Metabolomics
Researchers aimed to develop a method that determines the therapeutic efficacy of anticancer drugs based on the changes in amino acid metabolism at the cellular level.
Time Of Day Crucial to Accurately Test for Diseases
A new study published in PNAS has found that time of day and sleep deprivation have a significant effect on our metabolism.
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