Send to

Choose Destination
Cancer Res. 2010 Nov 15;70(22):8981-7. doi: 10.1158/0008-5472.CAN-10-1666. Epub 2010 Nov 2.

Inhibition of glutaminase preferentially slows growth of glioma cells with mutant IDH1.

Author information

Department of Neurosurgery, and Brain Science Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, USA.


Mutation at the R132 residue of isocitrate dehydrogenase 1 (IDH1), frequently found in gliomas and acute myelogenous leukemia, creates a neoenzyme that produces 2-hydroxyglutarate (2-HG) from α-ketoglutarate (α-KG). We sought to therapeutically exploit this neoreaction in mutant IDH1 cells that require α-KG derived from glutamine. Glutamine is converted to glutamate by glutaminase and further metabolized to α-KG. Therefore, we inhibited glutaminase with siRNA or the small molecule inhibitor bis-2-(5-phenylacetamido-1,2,4-thiadiazol-2-yl)ethyl sulfide (BPTES) and found slowed growth of glioblastoma cells expressing mutant IDH1 compared with those expressing wild-type IDH1. Growth suppression of mutant IDH1 cells by BPTES was rescued by adding exogenous α-KG. BPTES inhibited glutaminase activity, lowered glutamate and α-KG levels, and increased glycolytic intermediates while leaving total 2-HG levels unaffected. The ability to selectively slow growth in cells with IDH1 mutations by inhibiting glutaminase suggests a unique reprogramming of intermediary metabolism and a potential therapeutic strategy.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center