Biological and Pharmaceutical Bulletin
Online ISSN : 1347-5215
Print ISSN : 0918-6158
Magnoflorine from Coptidis Rhizoma Protects High Density Lipoprotein during Oxidant Stress
Tran Manh HungJong Pill LeeByung Sun MinJae Sue ChoiMinKyun NaXinFeng ZhangTran Minh NgocIkSoo LeeKiHwan Bae
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Volume 30 (2007) Issue 6 Pages 1157-1160

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The objective of the present study was to investigate the beneficial properties of magnoflorine, an alkaloid isolated from Coptidis Rhizoma, on protecting human high density lipoprotein (HDL) against lipid peroxidation. Magnoflorine exerts an inhibitory effect against Cu2+-induced lipid peroxidation of HDL, as showed by prolongation of lag time from 62 to 123 min at the concentration of 3.0 μM. It also inhibits the generation of thiobarbituric acid reactive substances (TBARS) in the dose-dependent maners with IC50 values of 2.3±0.2 μM and 6.2±0.5 μM since HDL oxidation mediated by either catalytic Cu2+ or thermo-labile radical initiator (AAPH), respectively. Separately, Cu2+ oxidized HDL lost the antioxidant action but the inclusion of magnoflorine/Cu2+ oxidized HDL can protect LDL oxidation according to increasing magnoflorine concentration. The results suggest that magnoflorine may have a role to play in preventing the HDL oxidation.

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© 2007 The Pharmaceutical Society of Japan
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