isoprostanes

isoprostanes

[‚ī·sō′prä‚stānz]
(biochemistry)
A class of natural products that are isomeric with prostaglandins but are formed in vivo by the nonenzymatic, free-radical oxygenation of arachidonic acid.
References in periodicals archive ?
Isoprostanes, the stable end products of peroxidation of arachidonic acid, are widely accepted as reliable indicators of oxidative stress in vivo (1, 2).
2] isoprostanes of all study participants and also had very low concentrations of urinary [gamma]-CEHC, possibly reflecting a low dietary intake of [gamma]-tocopherol.
The commonly studied markers are products of lipid peroxidation [such as malondialdehyde (MDA), 4-hydroxynonenal, and isoprostanes (3)], oxidized amino acidic residues (such as cystine, methionine sulfoxide, 3-nitrotyrosine, and 3-Cl-tyrosine), or protein carbonyls (PCO) (1, 4).
isoprene, ethane, pentane, acetone), and other typically nonvolatile substances such as isoprostanes, peroxynitrite, or cytokines, can be measured in breath condensate (5).
Lipid peroxidation generates a variety of relatively stable decomposition end products, mainly [alpha],[beta]-unsaturated reactive aldehydes, such as malondialdehyde (MDA), 4-hydroxy-2-nonenal (HNE), and 2-propenal (acrolein) (21, 22), and isoprostanes (23, 24), which can then be measured in plasma and urine as an indirect index of oxidative stress.
It has been shown that rofecoxib can cause a marked increase in nonenzymatic generation of isoprostanes and reduce the oxygen radical antioxidant capacity (23).
Plasma FZ isoprostanes and coronary artery calcification: the CARDIA study.
Isoprostanes are a complex family of compounds produced from arachidonic acid.
Perluxan works promptly in concert with numerous biochemical pathways responsible for inflammation with both enzymatic and non-enzymatic targets such as prostaglandin E2, cyclooxygenase 1+2, interlukein-1 and isoprostanes.
Lipidomic analysis of twenty-seven prostanoids and isoprostanes by liquid chromatography/electrospray tandem mass spectrometry.
Oxidative stress-induced peroxidation of membrane lipids eventually generates a variety of mainly [alpha], [beta] unsaturated reactive aldehydes, such as malondialdehyde (MDA), 4-hydroxy-2nonenal (HNE), 2 propenal (acrolein) and isoprostanes as terminal products, which also cause tissue damage (45).