The fruits of Cornus kousa Burg. were extracted with 80% aqueous methanol (MeOH) and the concentratedextract was partitioned with ethyl acetate (EtOAc), n-butanol (n-BuOH), and H2O. From the EtOAc fraction, 5 triterpenoidswere isolated through repeated silica gel (SiO2), octadecyl silica gel (ODS), and Sephadex LH-20 column chromatography(c.c.). These compounds were determined to be ursolic acid (1), corosolic acid (2), taraxasterol (3), betulinic acid (4), andbetulinic aldehyde (5) on the basis of their spectroscopic data including electronic ionization mass spectrometry, ultravioletspectroscopy, infrared spectroscopy, and nuclear magnetic resonance. This is the first reported isolation of these compoundsfrom this plant. Also, compounds 1, 3, 4, and 5 show a relatively high inhibitory activity against human acyl-CoA: cholesterolacyltransferase-1 (hACAT-1) with inhibition values of 52.8±0.7, 91.1±0.4, 93.0±0.7, and 96.2±0.2% at a concentration of100µM, respectively.
목차
Abstract Introduction Materials and Methods Results and Discussion References
Dae-Young Lee [ Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Yongin, Gyeonggi 446-701, Korea ]
Lakoon Jung [ Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Yongin, Gyeonggi 446-701, Korea ]
Ha-Na Lyu [ Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Yongin, Gyeonggi 446-701, Korea ]
Tae-Sook Jeong [ National Research Laboratory of Lipid Metabolism and Atherosclerosis, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Korea ]
Youn-Hyung Lee [ Department of Horticultural Biotechnology, Kyung Hee University, Yongin, Gyeonggi 446-701, Korea ]
Nam-In Baek [ Graduate School of Biotechnology and Plant Metabolism Research Center, Kyung Hee University, Yongin, Gyeonggi 446-701, Korea ]
Corresponding author