title: In vitro studies on the influence of L-ascorbic acid 2-[3,4-dihydro- 2,5,7,8-tetramethyl-2-(4,8,12-trimethyltridecyl)-2H-1-benzopyran-6yl-hy drogen phosphate] potassium salt on lipid peroxidation and phospholipase A2 activity.
abstract: The effects of L-ascorbic acid 2-[3,4-dihydro-2,5,7,8-tetramethyl-2- (4,8,12-trimethyltridecyl)-2H-1-benzopyran-6yl-hydrogen phosphate] potassium salt (EPC-K1, CAS 127061-56-7), a new compound for ischemia-reperfusion injuries, on lipid peroxidation and phospholipase A2 activity were studied in vitro using rat brain homogenates and human plasma. EPC-K1 inhibited phospholipase A2 activity in human plasma in a concentration-dependent manner (IC50 = 7.3 x 10(-4) mol/l), whereas a mixture of alpha-tocopherol and ascorbic acid did not exhibit this effect. In rat brain homogenates, EPC-K1 also inhibited lipid peroxidation in a concentration-dependent manner (IC50 = 2.3 x 10(-6) mol/l). alpha-Tocopherol was less active than EPC-K1. These properties of EPC-K1 suggest that EPC-K1 may prove useful in the treatment of ischemia-reperfusion injuries.
authors.affiliation: Research Laboratory, Senju Pharmaceutical Co., Ltd., Itami, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kuribayashi
authors.forename: K
authors.initials: K
authors.lastname: Yoshida
authors.forename: T
authors.initials: T
authors.lastname: Sakaue
authors.forename: A
authors.initials: A
authors.lastname: Okumura
mesh_terms: D000818:Animals; D001205:Ascorbic Acid / Q000494:pharmacology; D001921:Brain / Q000201:enzymology; D001923:Brain Chemistry / Q000187:drug effects; D066298:In Vitro Techniques; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D010741:Phospholipases A / Q000037:antagonists & inhibitors*; D054467:Phospholipases A2; D051381:Rats; D017208:Rats, Wistar; D014810:Vitamin E / Q000494:pharmacology
chemical_list: D014810:Vitamin E; D010741:Phospholipases A; D054467:Phospholipases A2; D001205:Ascorbic Acid