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|Ref Type||Journal Article|
|Authors||Seltzer MJ, Bennett BD, Joshi AD, Gao P, Thomas AG, Ferraris DV, Tsukamoto T, Rojas CJ, Slusher BS, Rabinowitz JD, Dang CV, Riggins GJ|
|Title||Inhibition of glutaminase preferentially slows growth of glioma cells with mutant IDH1.|
|Date||2010 Nov 15|
|Abstract Text||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.|
|Molecular Profile||Treatment Approach|
|Gene Name||Source||Synonyms||Protein Domains||Gene Description||Gene Role|
|Drug Name||Trade Name||Synonyms||Drug Classes||Drug Description|
|BPTES||bis-2-(5-phenylacetamido-1,2,4-thiadiazol-2-yl)ethyl sulfide||BPTES is a small molecule that inhibits glutaminase, which results in decreased conversion of glutamine to glutamate, and potentially leads to decreased tumor cell growth (PMID: 21045145, PMID: 25915584).|
|Gene||Variant||Impact||Protein Effect||Variant Description||Associated with drug Resistance|
|Molecular Profile||Indication/Tumor Type||Response Type||Therapy Name||Approval Status||Evidence Type||Efficacy Evidence||References|
|IDH1 R132H||malignant glioma||sensitive||BPTES||Preclinical - Cell culture||Actionable||In a preclinical study, a glioma cell line expressing IDH1 R132H demonstrated increased sensitivity to growth inhibition by BPTES compared to a cell line expressing wild-type IDH1 in culture (PMID: 21045145).||21045145|