Biochem/physiol Actions

Primary TargetRIP1 Kinase

Cell permeable: yes

General description

A cell-permeable furopyrimidinyl-phenyl urea compound that potently inhibits RIP1 kinase activity (IC₅₀ = 13 nM; [ATP] = 50 µM) by targeting RIPK1 ATP-binding pocket in its inactive DLG-out conformation (IC₅₀ = 63 nM in competitive binding assays against 5 nM ATP-site ligand) without affecting RIPK2 or RIPK5 activity even at concentrations as high as 1 µM ([ATP] = 10 µM). Effectively prevents TNFα-induced necroptosis in Z-VAD(OMe)-FMK- (Cat. No. 627610) treated U937 cultures (EC₅₀ = 250 nM) in vitro and is efficacious in protecting mice from body temperature loss (by 77%; 20 mg/kg p.o.) when administered 15 min prior to TNFα i.v. injection in vivo with good oral availability (plasma C_max = 1100 ng/mL, T_max = 4 h, AUC = 14 µg⋅h/mL; 2 mg/kg p.o.). Selectivity profiling in a 300-kinase panel shows significant inhibition against only 25 targets (IC₅₀﹤1 µM), notably RET, EPHA7, FLT3, EPHA6, HIPK4, DDR2, FMS, PDGFRa, and TrkC (% inhibition at 1 µM = 97%, 97%, 96%, 92%, 91%, 90%, 86%, 84%, 84%, respectively).

A cell-permeable, potent, reversible inhibitor of RIP1 kinase (IC₅₀ = 63 nM in RIP fluorescence polarization assay).

A cell-permeable, orally available furopyrimidinyl-phenyl urea compound that acts as a potent and reversible inhibitor of receptor interacting protein 1 (RIP1) kinase (IC₅₀ = 63 nM and 13 nM in RIP fluorescence polarization and ADP-Glo kinase assays, respectively). Binds to the ATP-binding pocket of RIP1 kinase with enzyme adopting a DLG-out inactive conformation. Shown to be moderately effective in inhibiting 25 other protein kinases in a screening of 300 kinases by radiolabeled assay, but only at high concentrations (~ 1 µM in the presence of 10 mM ATP). Blocks TNFα-induced necrotic cell death (IC₅₀ = 250 nM in U937 cells) and protects mice from TNFα-induced hypothermic shock when injected 15 min. prior to i.v. administration of TNFα. Displays desirable pharmacokinetic properties with good systemic exposure following an oral dose (AUC= 14 mg/h/ml; C_max = 1,100 ng/ml at 4 hours).Please note that the molecular weight for this compound is batch-specific due to variable water content.

Legal Information

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

Other Notes

Harris, P.A., et al. 2013. ACS Med. Chem. Lett.4, 1238.

Packaging

10 mg in Glass bottle

Reconstitution

Following reconstitution, aliquot and freeze (-20°C).

Use only fresh DMSO for reconstitution.

Warning

Toxicity: Standard Handling (A)