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장생도라지 (Platycodon grandiflorum)의 항산화 활성 평가
김충현(Chung Hyeon Kim),정봉용(Bong Yong Jung),정선기(Sun Ki Jung),이철호(Chul Ho Lee),이현선(Hyun Sun Lee),김봉희(Bong-Hee Kim),김상겸(Sang Kyum Kim) 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.1
Platycodon grandiflorum, Doraji as Korean name, is one of the most widely used traditional oriental medicine for bronchial diseases and also used as a folk remedy for geriatric diseases and inflammatory diseases. In recent studies, it has been reported that some effect of P. grandijlorum is derived from its antioxidant activity, although there is still a lack of evidence to establish its oxy-radical scavenging activity. In this study, total oxy-radical scavenging capacity (TOSC) assay was used to evaluate antioxidant activity of total extracts (T-PG), polysaccharide fraction (Po-PG), and saponin fraction (Sa-PG) isolated from P. grandiflorum against peroxyl radicals and peroxynitrites. And MTT assay was taken to assess cyto-protective effects of T-PG, Po-PG and Sa-PG in H4IIE cells treated with hydrogen peroxide and tert-butylhydroperoxide. In the TOSC assay, Sa-PG showed strong oxy-radical scavenging capacity compared with T-PG and Po-PG. In cell-based assay, T-PG and Po-PG protected cells from oxidative stress, but Sa-PG did not protect cells because of cytotoxicity of Sa-PG. These results suggest that the saponin components of P. grandiflorum have relatively strong antioxidant capacity and cytotoxicity in rat hepatoma cells.
박신영(Shin Young Park),정보섭(Bo Sup Chung),이형규(Hyeong Kyu Lee),이현선(Hyun Sun Lee),류종현(Jong Hyeon Ryu) 한국생약학회 1989 생약학회지 Vol.20 No.1
In order to establish the standard method for the preparation of processed Aconiti Tuber, Aconiti Tubers were processed under various conditions and the amount and the composition of alkaloids were determined by HPLC. The ratio of sum of benzoylhypaconine and benzoylmesaconine over the sum of aconitine, mesaconitine, benzoylmesaconine and benzoylhypaconine was used as a detoxification index ((BM+BH)×100/MA+AC+BM+BH). The adequate value of index was obtained from Japanese `ka-gong bu-ja` which has been used in Japan. The processing procedure was largely devided into two categories. First is heat treatment at 120° and 1.2 lbs for 60 min. Second is treatment with various kinds of alkaline solutions followed by heat treatment at 120° and 1.2 lbs for 60 min. Among the source of processed Aconiti Tubers, dried bu-ja and yom bu-ja, dried bu-ja was more adequate than yom bu-ja because yom bu-ja has the lower value of index than dried bu-ja and lost active components through the desalting periods. Dried bu-ja which was treated with alkaline solutions followed by heat treatment has the detoxification index, 50% and dried bu-ja which was treated only with heat has 71.8%. Compared to the value of index of Japanese `ka-gong bu-ja`, 72%, the dried bu-ja treated with heat at 120 and 1.21bs for 60 min was the most adequate. The LD<sub>50</sub> value of the processed bu-ja was higher than 15 g crude drugs/㎏, p.o. in mice.