Pan-IDH1/2 inhibitor (AG881) selectively inhibit mutant IDH protein and induce cell differentiation in in vitro and in vivo models. Upon administration, pan-IDH mutant inhibitor AG-881 specifically inhibits mutant forms of IDH1 and IDH2, thereby inhibiting the formation of the oncometabolite 2-hydroxyglutarate (2HG) from alpha-ketoglutarate (a-KG). This prevents 2HG-mediated signaling and leads to both an induction of cellular differentiation and an inhibition of cellular proliferation in tumor cells expressing IDH mutations.
In vivo
AG-881 fully penetrates the blood-brain barrier. AG-881 has been developed and is in early phase I testing for patients with IDH mutation-positive hematologic malignancies and solid tumors, including glioma.