• Publications
  • Influence
Mass spectrometry-based metabolomics.
This review presents an overview of the dynamically developing field of mass spectrometry-based metabolomics. Metabolomics aims at the comprehensive and quantitative analysis of wide arrays ofExpand
  • 1,531
  • 67
  • PDF
Lactic Acid and Acidification Inhibit TNF Secretion and Glycolysis of Human Monocytes
High concentrations of lactic acid (LA) are found under various pathophysiological conditions and are accompanied by an acidification of the environment. To study the impact of LA on TNF secretion,Expand
  • 227
  • 11
  • PDF
Advances in amino acid analysis
AbstractAmino acids are important targets for metabolic profiling. For decades, amino acid analysis has been accomplished by either cation-exchange or reversed-phase liquid chromatography coupled toExpand
  • 170
  • 7
Metabolic profiling of major vitamin D metabolites using Diels–Alder derivatization and ultra-performance liquid chromatography–tandem mass spectrometry
Biologically active forms of vitamin D are important analytical targets in both research and clinical practice. The current technology is such that each of the vitamin D metabolites is usuallyExpand
  • 151
  • 7
  • PDF
Delaying aging and the aging-associated decline in protein homeostasis by inhibition of tryptophan degradation
Toxicity of aggregation-prone proteins is thought to play an important role in aging and age-related neurological diseases like Parkinson and Alzheimer’s diseases. Here, we identify tryptophanExpand
  • 136
  • 7
  • PDF
Metabolite extraction from adherently growing mammalian cells for metabolomics studies: optimization of harvesting and extraction protocols
Trypsin/ethylenediaminetetraacetic acid (EDTA) treatment and cell scraping in a buffer solution were compared for harvesting adherently growing mammalian SW480 cells for metabolomics studies. InExpand
  • 168
  • 6
Urinary amino acid analysis: a comparison of iTRAQ-LC-MS/MS, GC-MS, and amino acid analyzer.
Urinary amino acid analysis is typically done by cation-exchange chromatography followed by post-column derivatization with ninhydrin and UV detection. This method lacks throughput and specificity.Expand
  • 129
  • 5
Direct and tumor microenvironment mediated influences of 5′‐deoxy‐5′‐(methylthio)adenosine on tumor progression of malignant melanoma
Recent studies have shown that a loss of methylthioadenosine phosphorylase (MTAP) gene expression exerts a tumor‐promoting effect, including induction of invasiveness, enhanced cell proliferation,Expand
  • 46
  • 4
Automated GC-MS analysis of free amino acids in biological fluids.
A gas chromatography-mass spectrometry (GC-MS) method was developed for the quantitative analysis of free amino acids as their propyl chloroformate derivatives in biological fluids. DerivatizationExpand
  • 144
  • 3
Comparison of derivatization and chromatographic methods for GC-MS analysis of amino acid enantiomers in physiological samples.
GC-MS analysis of fluorinated and non-fluorinated chloroformate and anhydride derivatives of amino acid (AA) enantiomers on two different chiral columns was compared for the direct quantification ofExpand
  • 45
  • 3