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Tuesday, July 29, 2014
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Whole Body Endogenous Nitric Oxide Production in Patients with Decompensated Liver Disease
Demoncheaux E., Elphick D.A., Dürner M.B., Higgins G.E., Crowther D., Williams E.J., Higenbottam T.W and Gleeson D

Increased nitric oxide (NO) production has been implicated in the pathogenesis of the hyperdynamic circulation found in patients with advanced liver disease. There were no differences between patients with liver disease and controls with regard whole body NO production. Our results, in a well characterised set of patients, argue against greater basal NOS-dependent whole body NO production in patients with decompensated liver disease.

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MS-Xelerator™: Advanced Algorithms for LC/MS Data Processing Applied to Biomarker Discovery, Differential Analysis and Quantitative Proteomics
M.M.A. Ruijken

LC-MS based proteomic experiments are used to compare complex biological samples across multiple conditions. Fast, powerful computational tools are needed to explore and detect differences in the areas of Expression Proteomics and Biomarker Discovery. In general, specialized steps are necessary to solve these difficult problems (binning, alignment & normalization, peak picking, relative quantitation, etc.). MS-Xelerator is a collection of software tools dedicated to all of the above tasks.

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Caveolin-1 Expression as a Possible Biomarker in Pancreatic Cancer Diagnosis
C. Tanase, E. Raducan, L. Albulescu, E. Codorean, M.I. Nicolescu, D.I. Popescu, M.L. Cruceru and A.C. Popa

Caveolin1 (Cav-1) function either as a tumor supressor or as a promoter of metastasis. Overexpresion of cav-1 was correlated with: tumoral grading, proliferration markers (Ki67, p53), serum tumor markers (CEA, CA19.9) and angiogenic markers (VEGF, bFGF).

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Challenges and Considerations for Building an Automated Method Development System
Margaret Antler, Michael McBrien, Andrey Vazhentsev and Vadim Tashlitsky

Automated chromatographic method development systems have been offered for a number of years, with varying degrees of effectiveness. A new system for automated method development, ACD/AutoChrom, is currently under development, and addresses some of the weaknesses of earlier configurations. AutoChrom uses both UV-Visible and MS detection to unequivocally track and resolve trace components, performing a chemometric evaluation of these detection techniques.

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Uranium Oxide Particulate Surrounding a Former Processing Facility
Nicholas S. Lloyd, Randall R. Parrish, Tim S. Brewer, Simon R. Chenery, Sarah V. Hainsworth

This research project aims to improve understanding of the behaviour of DU particulate in the environment, using a case study of a site that is heavily contaminated by past emissions. The research will help predict the long-term fate of pollution from uranium oxide particulate.

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A Sensitive Fluorimetric Assay for Detection of ß-Secretase Activity Using a Novel FRET Peptide Substrate
Xudong Zhu, Xing Han, Manpreet Mann, Rich Meyer, Xiaohe Tong, Anita Hong and Vera Rakhmanova

In order to facilitate high throughput screening of AD drug candidates, we have developed a new SensoLyte™ 520 b-secretase assay kit using a fluorescence resonance energy transfer (FRET) peptide, HiLyte Fluor™ 488-Glu-Val-Asn-Leu-Asp-Ala-Glu-Phe-Lys(QXL™ 520)-OH. The longer excitation and emission wavelengths of HiLyte Fluor™488 minimize the interference from autofluorescence and absorbance of test compounds.

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Glycoprotein Labeling and Detection: Novel Click Chemistry-based Applications for gel Electrophoresis, Flow Cytometry and Fluorescence Microscopy
Brian Agnew, Nancy Ahnert, Suzanne Buck, Scott Clarke, Courtenay Hart, Kapil Kumar, and Tamara Nyberg

We demonstrate highly-selective and sensitive labeling methods for the detection of specific glycoprotein subclasses, including cell surface N- and O-linked glycoproteins and intracellular O-GlcNAc modified proteins, utilizing the copper-catalyzed cycloaddition reaction between azides and alkynes, or click chemistry.

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PRIMe: Platform for RIKEN Metabolomics
Atsushi Fukushima, Miyako Kusano, Kenji Akiyama, Takeshi Obayashi, Takayuki Tohge, Masami Yokota Hirai, Shigehiko Kanaya, Masanori Arita, Yoko Shinbo, Kazuo Shinozaki, Tetsuya Sakurai and Kazuki Saito

We have developed a web-based database, "PRIMe (Platform for RIKEN Metabolomics)," which contains powerful tools for researchers to analyze gene co-expression data and mass spectral data. PRIMe has been developed with the main aim of facilitating integrated analysis for transcriptomics and metabolomics.

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Proteomic Profiling in Defining Chemoresistant Breast Cancer
Chuthapisith S, Layfield R, Kerr I, Hughes C and Eremin O

This study aims to identify protein profiles in breast cancer cells as predictors of chemoresistance by using two-dimensional gel electrophoresis and MALDI-TOF peptide mass fingerprinting. Our findings provide further insights into the complex mechanisms of chemoresistance, as well as representing an attractive starting point for the identification of potential protein biomarkers to predict response to chemotherapy in breast cancer in vivo.

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Showing Results 61 - 70 of 84
Scientific News
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.
Using LC-MS to Analyse Sulfonamides in Food Grade Honey
Sulfonamides are one of a number of groups of chemicals whose presence in honey is limited by international regulations.
Reimagining UHPLC
To learn more about the new Vanquish UHPLC system from Thermo Fisher Scientific we spoke to Wulff Niedner, Director of HPLC Product Marketing.
Mass Spec Predicts Improved Response to Anti-HER2 Therapy in Breast Cancer
Immunohistochemistry is the standard technique for detecting HER2 protein expression, it does not provide absolute quantification of this receptor and is prone to false-positives.
Mass Spectrometry Tool Helps Guide Brain Cancer Surgery
A tool to help brain surgeons test and more precisely remove cancerous tissue was successfully used during surgery, according to a Purdue University and Brigham and Women's Hospital study.
Evaluating Acute Hydrogen Sulfide Poisoning in Rats through Serum Metabolomics
Through the use of GC/MS-based metabolomics, researchers have evaluated the effect of acute hydrogen sulfide poisoning on the metabolic profiles of rats.
Simultaneous Determination of Free Urinary Steroids
Researchers have described an LC–MS/MS method that accurate, precise and is in accordance with FDA guidelines.
Human Proteome Project Uncovers 193 Proteins Not Known to Exist
The team of international researchers reports the identification of 193 novel proteins that came from regions of the genome not predicted to code for proteins.
Comparison of Pesticide Residues in Surface and Ground Water
Measurement of pesticide residues can be used as baseline levels to monitor the future changes and to predict their future impact on the population of the area.
New Innovation in Food Safety Testing
Researchers have used MALDI-TOF MS as a tool to detect Listeria contamination in food.
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