Lipid peroxidation in rat uterus.
Lipid peroxidation in rat uterus has been studied using NADPH- and ascorbate-induced systems. Lipid peroxidation in rat uterus is low as compared to rat liver. Uterus is more sensitive to ascorbate-induced lipid peroxidation than that induced by NADPH. Uterus contains lower amounts of phospholipids and has a lesser degree of unsaturation in lipids. Co-factor studies show that Fe2+ is more important for ascorbate-induced lipid peroxidation. Endometrium is more sensitive to ascorbate-induced lipid peroxidation than myometrium. It also contains more total lipids and phospholipids besides having a higher degree of unsaturation in the lipids as compared to myometrium. Among the subcellular fractions, mitochondria are more prone to ascorbate-induced lipid peroxidation, whereas microsomes are more sensitive to NADPH-induced lipid peroxidation. Uteri from old rats (24 months) and pregnant rats are more resistant to lipid peroxidation than those from 3-month-old control rats. Uterus of pregnant rats contains more factors which inhibit lipid peroxidation and also has a lesser degree of unsaturation in lipids compared with uterus of control rats. The possible consequences of the resistance of uterus to lipid peroxidation, especially during pregnancy and senescence, are discussed.
D000818:Animals; D001205:Ascorbic Acid / Q000494:pharmacology; D005260:Female; D005978:Glutathione / Q000378:metabolism; D008054:Lipid Peroxides / Q000378:metabolism*; D008099:Liver / Q000378:metabolism; D009249:NADP / Q000494:pharmacology; D009251:NADPH-Ferrihemoprotein Reductase / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013482:Superoxide Dismutase / Q000378:metabolism; D014599:Uterus / Q000378:metabolism*; D014810:Vitamin E / Q000378:metabolism
D008054:Lipid Peroxides; D014810:Vitamin E; D009249:NADP; D013482:Superoxide Dismutase; D009251:NADPH-Ferrihemoprotein Reductase; D005978:Glutathione; D001205:Ascorbic Acid