caa a22 4500 477121020 CHVBK 20180405111636.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00248461 doi (NATIONALLICENCE)springer-10.1007/BF00248461 Evaluation of hydroxyl radical-scavenging property of garlic [Elektronische Daten] [Kailash Prasad, Victor Laxdal, Ming Yu, Barbara Raney] Garlic has been reported to provide protection against hypercholesterolemic atherosclerosis and ischemia-reperfusion-induced arrhythmias and infarction. Oxygen free radicals (OFRs) have been implicated as causative factors in these diseases and antioxidants have been shown to be effective against these conditions. The effectiveness of garlic in these disease states could be due to its ability to scavenge OFRs. However, the OFR-scavenging activity of garlic is not known. Also it is not known if its activity is affected by cooking. We therefore investigated, using high pressure liquid chromatography, the ability of garlic extract (heated or unheated) to scavenge exogenously generated hydroxyl radical (·OH). ·OH was generated by photolysis of H202 (1.2-10 pmoles/ml) with ultraviolet (UV) light and was trapped with salicylic acid (500 nmoles/ml). H2O2 produced ·OH in a concentration-dependent manner as estimated by ·OH adduct products 2,3-dihydroxybenzoic acid (DHBA) and 2,5-DHBA. Garlic extract (5-100 μl/ml) produced an inhibition (30-100%) of 2,3-DHBA and 2,5-DHBA generated by photolysis of H202 (5.00 pmoles/ml) in a concentration-dependent manner. Its activity is reduced by 10% approximately when heated to 100°C for 20, 40 or 60 min. The extent of reduction in activity was similar for the three heating periods. Garlic extract prevented the ·OH-induced formation of malondialdehyde in the rabbit liver homogenate in a concentration-dependent manner. It alone did not affect the MDA levels in the absence of ·OH. These results indicate that garlic extract is a powerful scavenger of ·OH and that heating reduces its activity slightly. Kluwer Academic Publishers, 1996 hydroxyl radicals nationallicence garlic extract nationallicence oxygen free radical scavenger nationallicence high pressure liquid chromatography nationallicence malondialdehyde nationallicence liver homogenate nationallicence Prasad Kailash Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut Laxdal Victor Department of Pathology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut Yu Ming Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut Raney Barbara Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut Molecular and Cellular Biochemistry Kluwer Academic Publishers 154/1(1996-03-01), 55-63 0300-8177 154:1<55 1996 154 11010 https://doi.org/10.1007/BF00248461 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00248461 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prasad Kailash Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut NATIONALLICENCE 700 1- Laxdal Victor Department of Pathology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut NATIONALLICENCE 700 1- Yu Ming Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut NATIONALLICENCE 700 1- Raney Barbara Department of Physiology, College of Medicine, University of Saskatchewan and Royal University Hospital, Saskatoon, Saskatchewan, Canada aut NATIONALLICENCE 773 0- Molecular and Cellular Biochemistry Kluwer Academic Publishers 154/1(1996-03-01), 55-63 0300-8177 154:1<55 1996 154 11010 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer