GÜLÇİN, İlhamielias, RiadGepdiremen, ALİ AKÇAHANChea, AunTopal, Fevzi2020-10-292020-10-292010-02-01GÜLÇİN İ., elias R., Gepdiremen A. A. , Chea A., Topal F., -Antioxidant activity of bisbenzylisoquinoline alkaloids from Stephania rotunda: cepharanthine and fangchinoline-, JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY, cilt.25, ss.44-53, 2010http://hdl.handle.net/20.500.12645/25356In the present study, we determined the antioxidant activity of cepharanthine and fangchinoline from Stephania rotunda by performing different in vitro antioxidant assays, including 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging, 2,2--azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging, N,N-dimethyl-p-phenylenediamine dihydrochloride (DMPD) radical scavenging, superoxide anion (O-2(center dot-)) radical scavenging, hydrogen peroxide scavenging, total antioxidant activity, reducing power, and ferrous ion (Fe2+) chelating activities. Cepharanthine and fangchinoline showed 94.6 and 93.3% inhibition on lipid peroxidation of linoleic acid emulsion at 30 mu g/mL concentration, respectively. On the other hand, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), alpha-tocopherol, and trolox indicated inhibitions of 83.3, 92.2, 72.4, and 81.3% on peroxidation of linoleic acid emulsion at the same concentration (30 mu g/mL), respectively. According to the results, cepharanthine and fangchinoline have effective antioxidant and radical scavenging activity.ArticleWOS:0002750009000067434913058710.3109/14756360902932792