A Mitochondria-Targeted Macrocyclic Mn(II) Superoxide Dismutase Mimetic
摘要:
Superoxide (O-2(center dot-)) is the proximal mitochondrial reactive oxygen species underlying pathology and redox signaling. This central role prioritizes development of a mitochondria-targeted reagent selective for controlling O-2(center dot-). We have conjugated a mitochondria-targeting triphenylphosphonium (TPP) cation to a O-2(center dot-)-selective pentaaza macrocyclic Mn(II) superoxide dismutase (SOD) mimetic to make MitoSOD, a mitochondria-targeted SOD mimetic. MitoSOD showed rapid and extensive membrane potential-dependent uptake into mitochondria without loss of Mn and retained SOD activity. Pulse radiolysis measurements confirmed that MitoSOD was a very effective catalytic SOD mimetic. MitoSOD also catalyzes the ascorbate-dependent reduction of O-2(center dot-). The combination of mitochondrial uptake and O-2(center dot-) scavenging by MitoSOD decreased inactivation of the matrix enzyme aconitase caused by O-2(center dot-). MitoSOD is an effective mitochondria-targeted macrocyclic SOD mimetic that selectively protects mitochondria from O-2(center dot-) damage.
A Mitochondria-Targeted Macrocyclic Mn(II) Superoxide Dismutase Mimetic
作者:Geoffrey F. Kelso、Andrej Maroz、Helena M. Cochemé、Angela Logan、Tracy A. Prime、Alexander V. Peskin、Christine C. Winterbourn、Andrew M. James、Meredith F. Ross、Sally Brooker、Carolyn M. Porteous、Robert F. Anderson、Michael P. Murphy、Robin A.J. Smith
DOI:10.1016/j.chembiol.2012.08.005
日期:2012.10
Superoxide (O-2(center dot-)) is the proximal mitochondrial reactive oxygen species underlying pathology and redox signaling. This central role prioritizes development of a mitochondria-targeted reagent selective for controlling O-2(center dot-). We have conjugated a mitochondria-targeting triphenylphosphonium (TPP) cation to a O-2(center dot-)-selective pentaaza macrocyclic Mn(II) superoxide dismutase (SOD) mimetic to make MitoSOD, a mitochondria-targeted SOD mimetic. MitoSOD showed rapid and extensive membrane potential-dependent uptake into mitochondria without loss of Mn and retained SOD activity. Pulse radiolysis measurements confirmed that MitoSOD was a very effective catalytic SOD mimetic. MitoSOD also catalyzes the ascorbate-dependent reduction of O-2(center dot-). The combination of mitochondrial uptake and O-2(center dot-) scavenging by MitoSOD decreased inactivation of the matrix enzyme aconitase caused by O-2(center dot-). MitoSOD is an effective mitochondria-targeted macrocyclic SOD mimetic that selectively protects mitochondria from O-2(center dot-) damage.
Mitochondrially targeted antioxidants
申请人:Medical Research Council
公开号:US20040029851A1
公开(公告)日:2004-02-12
The invention provides mitochondrially targeted antioxidant compounds comprising a lipophilic cation moiety covalently coupled to an antioxidant moiety which is either a superoxide dismutase (SOD) mimetic or a glutathione peroxidase mimetic. These compounds can be used to treat patients who would benefit from the reduction of oxidative stress.