| Literature DB >> 25908561 |
Kumar Pichumani1, Tomoyuki Mashimo2, Hyeon-Man Baek3, James Ratnakar4, Bruce Mickey5, Ralph J DeBerardinis6, Elizabeth A Maher7, Robert M Bachoo7, Craig R Malloy8, Zoltan Kovacs4.
Abstract
(13)C NMR (nuclear magnetic resonance) spectroscopy of extracts from patient tumor samples provides rich information about metabolism. However, in isocitrate dehydrogenase (IDH)-mutant gliomas, (13)C labeling is obscured in oncometabolite 2-hydroxyglutaric acid (2 HG) by glutamate and glutamine, prompting development of a simple method to resolve the metabolites. J-coupled multiplets in 2 HG were similar to glutamate and glutamine and could be clearly resolved at pH 6. A cryogenically cooled (13)C probe, but not J-resolved heteronuclear single quantum coherence spectroscopy, significantly improved detection of 2 HG. These methods enable the monitoring of (13)C-(13)C spin-spin couplings in 2 HG expressing IDH-mutant gliomas.Entities:
Keywords: (13)C NMR; 2-Hydroxyglutarate; Cryoprobe; IDH-mutant gliomas
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Year: 2015 PMID: 25908561 PMCID: PMC4458399 DOI: 10.1016/j.ab.2015.04.017
Source DB: PubMed Journal: Anal Biochem ISSN: 0003-2697 Impact factor: 3.365