Oxidation of Plasmalogen, Low-Density Lipoprotein and RAW 264.7 Cells by Photoactivatable Atomic Oxygen Precursors.
The oxidation of lipids by endogenous or environmental reactive oxygen species (ROS) generates a myriad of different lipid oxidation products that have important roles in disease pathology. The lipid oxidation products obtained in these reactions are dependent upon the identity of the reacting ROS. The photoinduced deoxygenation of various aromatic heterocyclic oxides has been suggested to generate ground state atomic oxygen (O[3P]) as an oxidant; however, very little is known about reactions between lipids and O(3P). To identify lipid oxidation products arising from the reaction of lipids with O(3P), photoactivatable precursors of O(3P) were irradiated in the presence of lysoplasmenylcholine, low-density lipoprotein and RAW 264.7 cells under aerobic and anaerobic conditions. Four different aldehyde products consistent with the oxidation of plasmalogens were observed. The four aldehydes were: tetradecanal, pentadecanal, 2-hexadecenal and hexadecanal. Depending upon the conditions, either pentadecanal or 2-hexadecenal was the major product. Increased amounts of the aldehyde products were observed in aerobic conditions.
Department of Chemistry, Saint Louis University, St. Louis, MO, USA.
Max T
MT
Bourdillon
Benjamin A
BA
Ford
Ashley T
AT
Knulty
Colleen N
CN
Gray
Miao
M
Zhang
David
D
Ford
Ryan D
RD
McCulla
D000332:Aerobiosis; D000447:Aldehydes / Q000737:chemistry; D000693:Anaerobiosis; D000818:Animals; D002460:Cell Line; D008077:Lipoproteins, LDL / Q000737:chemistry*; D008246:Lysophospholipids / Q000737:chemistry* / Q000494:pharmacology; D008264:Macrophages / Q000187:drug effects*; D051379:Mice; D015394:Molecular Structure; D016877:Oxidants; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry* / Q000378:metabolism; D010782:Photolysis; D010955:Plasmalogens / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000494:pharmacology*
D000447:Aldehydes; D008077:Lipoproteins, LDL; D008246:Lysophospholipids; D016877:Oxidants; D010955:Plasmalogens; D017382:Reactive Oxygen Species; C021215:lysoplasmalogens; D010100:Oxygen; C519712:2-hexadecenal