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Enos Tangke Arung,Irawan Wijaya Kusuma,Sri Purwatiningsih,양재하,Soohyeon Jeon,김용웅,Edi Sukaton,Britanto Dani Wicaksono,Ferry Sandra,Joko Susilo,Yuli Astuti,Kuniyoshi Shimizu,Ryuichiro Kondo,노성수 사단법인약침학회 2009 Journal of Acupuncture & Meridian Studies Vol.2 No.4
We investigated the leaves of Kleinhovia hospita, a plant which has been traditionallyused in Indonesia as phytotherapy to cure liver disease, to describe antioxidantmaterials from plant sources. K. hospita leaves were extracted with methanol andfurther partitioned into n-hexane, diethyl ether, and ethyl acetate. The antioxidantactivity of each fraction and the residue was assessed using a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method and their cytotoxicity on HepG2liver cancer cells was determined by a MTT assay. The K. hospita leaf methanolextract showed strong antioxidant activity (96%) compared with vitamin C (98%) bythe DPPH method and the measured activity from the subsequent extracts of themethanol extract were 48.9% for n-hexane, 74.0% for diethyl ether, 84.3% for ethylacetate, and 77.1% for the residue. The MTT assay showed the cytotoxicity of themethanol extract on HepG2 cells at 14%, 76%, and 80% at concentrations of 50 μg/mL, 87.5 μg/mL, and 125 μg/mL, respectively. Leaf extracts of the medicinal plantK. hospita showed potent antioxidant activity and moderate cytotoxicity on HepG2liver cancer cells.