Occurrence of singlet oxygen oxygenation of oleic acid and linoleic acid in the skin of live mice.
To assess the contribution of singlet molecular oxygen [O(2) ((1)Delta(g))] to lipid peroxidation in vivo, this study combined gas chromatography-mass spectrometry with thin layer chromatography to analyse peroxidized lipids in the skin of hairless mice. Hydroxyoctadecenoate isomers and unconjugated hydroxyoctadecadienoate isomers derived from peroxidized oleic acid and linoleic acid, respectively, which are specific to O(2) ((1)Delta(g))-dependent oxygenation, were detected in the skin of live mice under ordinary feeding conditions. Short-term ultraviolet A (UVA)-irradiation of the skin in vivo elevated levels of the unconjugated hydroxyoctadecadienoate isomers significantly, whereas the irradiation of skin homogenate in vitro increased levels of all isomers derived from both O(2) ((1)Delta(g)) and free radical-dependent oxygenation to a much greater extent. This is the first report to demonstrate the occurrence of O(2) ((1)Delta(g))-specific oxygenation of unsaturated fatty acids in living animals.
Minami
Yuko
Y
Department of Food Science, Graduate School of Nutrition and Bioscience, The University of Tokushima, Tokushima, Japan.
Yokoyama
Kanako
K
Bando
Noriko
N
Kawai
Yoshichika
Y
Terao
Junji
J
D000818:Animals; D002849:Chromatography, Gas / Q000379:methods; D002855:Chromatography, Thin Layer; D005609:Free Radicals; D019787:Linoleic Acid / Q000737:chemistry*; D015227:Lipid Peroxidation; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D051379:Mice; D008812:Mice, Hairless; D019301:Oleic Acid / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D026082:Singlet Oxygen; D012867:Skin / Q000378:metabolism*; D014466:Ultraviolet Rays
D005609:Free Radicals; D026082:Singlet Oxygen; D019301:Oleic Acid; D019787:Linoleic Acid; D010100:Oxygen