An apoptosis regulator isolated from petasites japonicum = 머위로부터 분리한 apoptosis 조절물질

Abstract

During the screening of inhibitors of caspase-3 induction in U937 human monocytic leukemia cells from natural sources, Petasites japonicum, which showed a high level of inhibition was selected. The inhibiting compound was purified from the methanol extract by Sephadex LH-20 column chromatography and HPLC. The inhibitor was identified as [3-(3,4-dihydroxyphenyl)-2-oxopropyl]ester, petasiphenol, by spectroscopic methods of UV, EIMS, 1 H？NMR 13C-NMR and HMBC. It showed a caspase-3 inducing inhibitory activity at 8μg/ml of IC50 value with DNA fragmentation inhibition in U937 human leukemia cells. It also showed a free radical scavenging ability of 1,1-diphenyl-2-picrylhydrazyl.