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Metabolite common among cancers
Date:2/8/2010

A study published online on February 8 in the Journal of Experimental Medicine (www.jem.org) reports that several distinct mutations found in a subset of patients with acute myelogenous leukemia (AML) result in excess production of the same metabolite.

The enzyme isocitrate dehydrogenase 1 (IDH1), which normally facilitates production of the metabolite {alpha}-ketoglutarate, is mutated in approximately 80% of secondary brain tumors. This mutant version of IDH1 promotes excess production of a different metabolite: R (-)-2-hydroxyglutarate (2-HG).

A team led by Tak Mak (Toronto) detected elevated concentrations of 2-HG in the serum of the approximately 8% of AML patients with mutations in IDH1. In addition, they identified a mutation in IDH2the sister enzyme of IDH1in some AML patients. These patients also had unusually high serum levels of 2-HG.

Additional work is needed to understand if and how 2-HG influences brain cancer and/or leukemia progression. However, as these mutations have so far only been found in cancer, they may prove useful as drug targets.


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Contact: Rita Sullivan
news@rupress.org
212-327-8603
Rockefeller University Press
Source:Eurekalert

Page: 1

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