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Ref Type Journal Article
PMID (27355333)
Authors Fujii T, Khawaja MR, DiNardo CD, Atkins JT, Janku F
Title Targeting isocitrate dehydrogenase (IDH) in cancer.
Journal Discovery medicine
Vol 21
Issue 117
Date 2016 05
URL
Abstract Text Isocitrate dehydrogenase (IDH) is an essential enzyme for cellular respiration in the tricarboxylic acid (TCA) cycle. Recurrent mutations in IDH1 or IDH2 are prevalent in several cancers including glioma, acute myeloid leukemia (AML), cholangiocarcinoma and chondrosarcoma. The mutated IDH1 and IDH2 proteins have a gain-of-function, neomorphic activity, catalyzing the reduction of α-ketoglutarate (α-KG) to 2-hydroxyglutarate (2-HG) by NADPH. Cancer-associated IDH mutations block normal cellular differentiation and promote tumorigenesis via the abnormal production of the oncometabolite 2-HG. High levels of 2-HG have been shown to inhibit α-KG dependent dioxygenases, including histone and deoxyribonucleic acid (DNA) demethylases, which play a key role in regulating the epigenetic state of cells. Current targeted inhibitors of IDH1 (AG120, IDH305), IDH2 (AG221), and pan-IDH1/2 (AG881) selectively inhibit mutant IDH protein and induce cell differentiation in in vitro and in vivo models. Preliminary results from phase I clinical trials with IDH inhibitors in patients with advanced hematologic malignancies have demonstrated an objective response rate ranging from 31% to 40% with durable responses (>1 year) observed. Furthermore, the IDH inhibitors have demonstrated early signals of activity in solid tumors with IDH mutations, including cholangiocarcinomas and low grade gliomas.

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Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
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