HIF Inhibitor VII

Biochem/physiol Actions

Reversible: yes

Primary TargetHIF-2α

Cell permeable: yes

General description

A cell-permeable, metabolically stable (t_1/2 = 14 h in 786-0 cultures; no metabolization up to 24 h in medium alone), non-cytotoxic (up to 30 µM & 24 h in 786-0 and Hep3B cultures) benzoxadiazolamine that prevents HIF-2α-HIF-β/ARNT (aryl hydrocarbon receptor nuclear translocator) heterodimeration by perturbing HIF-2α Per-ARNT-Sim/PAS-B domain surface β-sheet conformation via a 1:1 stoichiometric binding to HIF-2α PAS-B internal cavity (K_D = 81 nM), while exhibiting no affinity toward HIF-1α PAS-B domain (K_D >>5 µM). Shown to inhibit nuclear HIF-2α-ARNT, but not HIF-1α-ARNT, association in hypoxic Hep3B cells in a dose-dependent manner (0.1 to 10 µM) and selectively decrease hypoxia-induced HIF-2α DNA binding and HIF-2α-dependent EPO mRNA upregulation (% inhibition/time/dose = 60%/6 h/1 µM, 90%/6 h/10 µM, 45%/12 h/1 µM, 93%/12 h/10 µM), displaying little effect toward HIF-1α DNA binding or HIF-1α-dependent PGK1 mRNA upregulation. Unlike HIF Inhibitors I-VI, this compound does not affect the cellular protein or mRNA levels of HIF-1α & HIF-2α.

A cell-permeable benzoxadiazolamine that prevents HIF-2α-HIF-β/ARNT heterodimeration by perturbing HIF-2α Per-ARNT-Sim/PAS-B domain surface β-sheet conformation via a 1:1 stoichiometric binding (K_D = 81 nM), while exhibiting no affinity toward HIF-1αPAS-B domain. Shown to be metabolically stable and non-cytotoxic in cultures and selectively inhibit hypoxia-induced HIF-2α DNA binding and HIF-2α-dependent EPO mRNA upregulation (1 to10 µM for 6 to 12 h), but not HIF-1α DNA binding or HIF-1α-dependent PGK1 mRNA upregulation, in Hep3B cells. Unlike HIF Inhibitors I-VI, this compound does not affect the cellular protein or mRNA levels of HIF-1α & HIF-2α.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Other Notes

Wu, D., et al. 2015. Nature in press.Scheuermann, T.H., et al. 2013. Nat. Chem. Biol.9, 271.

Packaging

Packaged under inert gas

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Use only fresh DMSO for reconstitution.

Warning

Toxicity: Standard Handling (A)