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The chemistry of cell signaling by reactive oxygen and nitrogen species and 4-hydroxynonenal Forman HJ; Fukuto JM; Miller T; Zhang H; Rinna A; Levy SArch Biochem Biophys 2008[Sep]; 477 (2): 183-95During the past several years, major advances have been made in understanding how reactive oxygen species (ROS) and nitrogen species (RNS) participate in signal transduction. Identification of the specific targets and the chemical reactions involved still remains to be resolved with many of the signaling pathways in which the involvement of reactive species has been determined. Our understanding is that ROS and RNS have second messenger roles. While cysteine residues in the thiolate (ionized) form found in several classes of signaling proteins can be specific targets for reaction with H(2)O(2) and RNS, better understanding of the chemistry, particularly kinetics, suggests that for many signaling events in which ROS and RNS participate, enzymatic catalysis is more likely to be involved than non-enzymatic reaction. Due to increased interest in how oxidation products, particularly lipid peroxidation products, also are involved with signaling, a review of signaling by 4-hydroxy-2-nonenal (HNE) is included. This article focuses on the chemistry of signaling by ROS, RNS, and HNE and will describe reactions with selected target proteins as representatives of the mechanisms rather attempt to comprehensively review the many signaling pathways in which the reactive species are involved.|*Models, Biological[MESH]|Aldehydes/*metabolism[MESH]|Animals[MESH]|Humans[MESH]|Hydrogen Peroxide/*metabolism[MESH]|Reactive Nitrogen Species/*metabolism[MESH]|Reactive Oxygen Species/*metabolism[MESH]|Signal Transduction/*physiology[MESH] |
