NOX Inhibitor IV, GKT136901

An orally bioavailable, non-toxic pyrazolopyridinedione based compound that acts as a potent and reversible inhibitor of NOX1- and NOX4-containing NADPH oxidase activity (K_i = 160 and 165 nM, respectively, Amplex Red assay) and devoid of antioxidant properties. At higher concentrations, affects NOX2 (K_i = 1.53 uM). Blocks NOX-mediated ROS (reactive oxygen species) outburst in NOX isozyme expressing PMN cell membranes. Exhibits poor affinity towards xanthine oxidase, lipoxygenases-5/12, myeloperoxidase, MAO-B, iNOS and eNOS, several cytochrome P450 isozymes, PTP1B and a panel containing representative ion-channels and kinases at 10 µM. Functions as a selective scavenger of peroxynitrite over nitric oxide, superoxide radical anion and hydroxyl radical.

Please note that the molecular weight for this compound is batch-specific due to variable water content. Please refer to the vial label or the certificate of analysis for the batch-specific molecular weight. The molecular weight provided represents the baseline molecular weight without water.

Cell permeable: yes

Primary Target
NOX1- and NOX4-containing NADPH oxidase activity

Reversible: yes

Packaged under inert gas

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.

Schildknecht, S., et al. 2014. Curr. Med. Chem.21, 365.
Laleu, B., et al. 2010. J. Med. Chem.53, 7715.
Sedeek, M., et al. 2010. Am. J. Physiol. Renal Physiol.299, F1348.

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

Toxicity: Standard Handling (A)