4-[(4-(((1,1-DIMETHYLETHYL)OXIDOIMINO)METHYL)PHENOXY)BUTYL]TRIPHENYLPHOSPHONIUM BROMIDE

Description

MitoPBN is a mitochondria-targeted antioxidant.¹ It accumulates in the mitochondria following the generation of a mitochondrial membrane potential by succinate, an effect that is blocked by addition of the mitochondrial membrane potential uncoupler FCCP . MitoPBN inhibits superoxide activation of mitochondrial uncoupling protein 1 (UCP1), UCP2, and UCP3 when used at a concentration of 250 nM in vitro but does not react with superoxide. It traps hydroxyl (IC₅₀ = ~77 μM) and carbon-centered radicals and inhibits the initiation of lipid peroxidation in isolated bovine heart mitochondria.

References

1. Murphy, M.P., Echtay, K.S., Blaikie, F.H., et al. Superoxide activates uncoupling proteins by generating carbon-centered radicals and initiating lipid peroxidation: Studies using a mitochondria-targeted spin trap derived from α-phenyl-N-tert-butylnitrone J. Biol. Chem. 278(49),48534-48545(2003).