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. 2018 Jan 19;9(4):300-305.
doi: 10.1021/acsmedchemlett.7b00421. eCollection 2018 Apr 12.

Discovery of AG-120 (Ivosidenib): A First-in-Class Mutant IDH1 Inhibitor for the Treatment of IDH1 Mutant Cancers

Affiliations

Discovery of AG-120 (Ivosidenib): A First-in-Class Mutant IDH1 Inhibitor for the Treatment of IDH1 Mutant Cancers

Janeta Popovici-Muller et al. ACS Med Chem Lett. .

Abstract

Somatic point mutations at a key arginine residue (R132) within the active site of the metabolic enzyme isocitrate dehydrogenase 1 (IDH1) confer a novel gain of function in cancer cells, resulting in the production of d-2-hydroxyglutarate (2-HG), an oncometabolite. Elevated 2-HG levels are implicated in epigenetic alterations and impaired cellular differentiation. IDH1 mutations have been described in an array of hematologic malignancies and solid tumors. Here, we report the discovery of AG-120 (ivosidenib), an inhibitor of the IDH1 mutant enzyme that exhibits profound 2-HG lowering in tumor models and the ability to effect differentiation of primary patient AML samples ex vivo. Preliminary data from phase 1 clinical trials enrolling patients with cancers harboring an IDH1 mutation indicate that AG-120 has an acceptable safety profile and clinical activity.

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Conflict of interest statement

The authors declare the following competing financial interest(s): S.d.B. serves on advisory boards for Agios and Celgene. S.S.M.S is a consultant for Agios.

Figures

Figure 1
Figure 1
Mean ± SD concentrations of AG-120 in plasma and 2-HG in tumor after single oral administration of AG-120 at 50 or 150 mg/kg in a mouse HT1080 xenograft tumor model (n = 3 at each time point).
Figure 2
Figure 2
Percent intracellular 2-HG remaining relative to DMSO control after 6 days’ treatment with AG-120 in mIDH1-R132H or mIDH1-R132C patient samples (mean ± SEM from cells from four patients with mIDH1 AML).

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