4-hydroxy-2-nonenal and uncoupling proteins: an approach for regulation of mitochondrial ROS production.

Title4-hydroxy-2-nonenal and uncoupling proteins: an approach for regulation of mitochondrial ROS production.
Publication TypeJournal Article
Year of Publication2007
AuthorsEchtay, KS, Brand, MD
JournalRedox Rep
Date Published2007
KeywordsAldehydes, Energy Metabolism, Humans, Ion Channels, Mitochondria, Mitochondrial Membranes, Mitochondrial Proteins, Models, Biological, Oxidative Stress, Reactive Oxygen Species, Signal Transduction, Uncoupling Protein 2, Uncoupling Protein 3

One factor that has the potential to regulate reactive oxygen species (ROS) generation is the mild uncoupling of oxidative phosphorylation, i.e. proton (H(+)) leak across the mitochondrial inner membrane. Proton leak has been shown to attenuate ROS generation, whereas ROS and their derivatives (such as superoxide and hydroxynonenal) have been shown to induce H(+) leak through uncoupling proteins (UCPs). This suggests the existence of a feedback loop between ROS and H(+) leak mediated through UCPs. Although the physiological functions of the new UCPs, such as UCP2 and UCP3, are still not established, extensive data support the idea that these mitochondrial carrier proteins are involved in the control of ROS generation. The molecular basis of both ROS generation and hydroxynonenal-induced uncoupling through UCPs is reviewed and the consequences of their interaction for protection against excessive ROS production at the expense of energy production is discussed.

Alternate JournalRedox Rep.
Citation Key10.1179/135100007X162158
PubMed ID17263904
Grant ListMC_U105663137 / / Medical Research Council / United Kingdom