치자 껍질의 phytic acid 함량과 CM (chloroform:methanol, 2:1, v/v), n-부탄올 및 70% 에탄올을 사용한 추출물의 용매(3가지) 별 총 페놀 함량 및 항산화 활성 능력 등을 통하여 치자 껍질의 효용 가치를 검토한 결과, phytic acid 함량은 4.966±0.996 mg PAE/g DW (dry weight)로 나타났으며, 용매 별 생리 활성은 농도(0.2, 0.4, 0.6 mg/mL)가 높아질수록 유의적으로 증가하였으며(p<0.05), 양성대조군으로 사용된 ascorbic acid, BHA, trolox 보다는 각 농도에서 낮은 활성이 관찰되었다. 치자 껍질의 총 페놀 함량은 CM, n-부탄올, 70% 에탄올 추출물 순으로 CM 추출물에서 39.74±0.15 mg CAE/g으로 가장 높았으며, nitric oxide (NO) 라디칼 소거능과 지질과산화 저해능은 용매 별로 CM > 70% 에탄올 > n-부탄올, nitrite (NO2) 소거능은 n-부탄올 > CM > 70% 에탄올, β-carotene 탈색 저해능과 환원력은 CM > n-부탄올 > 70% 에탄올 순의 활성이 나타났다. 이상의 결과, 치자 껍질의 용매 별 총 페놀 함량 순과 항산화력, 환원력은 일치 하였으며, 질소산화물 소거능과 지질과산화 저해능 분석에서는 일치하지 않은 것으로 확인되었다. 이는 질소산화물 소거능과 지질과산화 저해능은 페놀 성분 보다 다른 생리활성물질이 더 큰 영향을 주는 것으로 추정된다. 이에, 치자 껍질은 질소산화물 소거능, 항산화능 및 지질과산화 저해능 등이 우수한 것으로 나타나 기능성 식품 소재로서의 가치가 있는 것으로 판단된다.

치자 껍질의 70% methanol, ethyl acetate (EA) 및 distilled water (DW)의 용매 별 추출물 의 total phenol 함량 및 질소 산화물 소거능, 환원력, β-carotene 탈색을 이용한 항산화력 및 지질과 산화 저해능 측정을 통하여 치자의 기능성 식품 소재로서의 가치를 검토한 결과, anthocyanin 함량은 3.519±0.635 mg/100 g DW로 나타났으며, 용매 별 추출 수율은 DW (39.87%), 70% methanol (36.26%), EA (2.88%) 로 관찰되었다. 추출 용매 별 항산화 활성은 농도(0.2, 0.4, 0.6 mg/mL)가 증가 할수록 유의적으로 증가하였으며 control로 사용된 ascorbic acid, BHA, trolox 보다는 낮은 활성이 확 인되었다. 치자 껍질의 total phenol 함량은 EA, 70% methanol, DW 추출물 순으로 EA 추출물에서 26.59±0.20 CAE (caffeic acid equivalents) mg/g으로 가장 높았으며, Nitric oxide (NO) radical 소거 능에서는 70% methanol (70.32~76.15%), DW (52.66~59.31%), EA (34.65~46.98%) 추출물 순으로 나타났다. Nitrite (NO2) 소거능은 70% methanol (34.57~39.33%), DW (32.53~38.47%), EA (27.59~32.62%) 순으로 관찰되었다. β-carotene 탈색 저해능은 DW (41.55~50.97%), 70% methanol (23.37~44.80%), EA (13.37~25.24%) 순으로 동정되었다. Reducing power (optical density)는 70% methanol (0.044~0.127), DW (0.033~0.099), EA (0.026~0.097) 순으로 확인되었다. 지질과산화 저해 능은 껍질 추출물 중 70% methanol (56.51~76.21%), EA (54.59~63.34%), DW (47.92~61.11%) 순 으로 관찰되었다(p<0.05). 이에, 치자 껍질은 기능성 식품 및 천연 항산화제로서의 가치가 매우 높을 것 으로 판단된다.

Tremella fuciformis were collected from dead Quercus limbs at Haenam, Jeonnam province in 2003 and cultured in artificial media with Hypoxylon sp., a symbiotic fungi. Various extracts were prepared from this cultured mushroom according to three experimental settings and their antioxidant properties were examined. Antioxidant activity of extracts from Tremella fuciformis was evaluated by scavenging activity of 2,2´-azinobis-(3-ethylbenzothiazoline- 6-sulfonic acid) radical cation (ABTS+), 1,1- diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and superoxide dismutase(SOD)-like activity. Among the extracts, the chloroform extract from in experimental setting I showed the most potent radical scavenging activity in each assay, showing 56% of DPPH radical scavenging activity at 1,000 ppm and 35.7% of ABTS+ scavenging activity at 1,000 ppm. Total phenolic content were estimated in various extract by using caffeic acid, chlorogenic acid, catechin, and ferulic acid as standards. Correlations of phenolic content in each extracts with antioxidant activity will be discussed in this study.

Tremella fuciformis were collected from dead Quercus limbs at Haenam, Jeonnam province in 2003 and cultured in artificial media with Hypoxylon sp., a symbiotic fungi. Various extracts were prepared from this cultured mushroom according to three experimental settings and their antioxidant properties were examined. Antioxidant activity of extracts from Tremella fuciformis was evaluated by scavenging activity of 2,2´-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS+), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and superoxide dismutase(SOD)-like activity. Among the extracts, the chloroform extract from in experimental setting I showed the most potent radical scavenging activity in each assay, showing 56% of DPPH radical scavenging activity at 1,000 ppm and 35.7% of ABTS+scavenging activity at 1,000 ppm. Total phenolic content were estimated in various extract by using caffeic acid, chlorogenic acid, catechin, and ferulic acid as standards. Correlations of phenolic content in each extracts with antioxidant activity will be discussed in this study.

Schisandra chinensis have been traditionally used in Asia for the treatment of dyspnea, cough, mouth dryness, spontaneous diaphoresis, nocturnal diaphoresis, nocturnal emission, dysentery, insomnia and amnesia. The purpose of this study is to evaluate the protective effects of Schisandra chinensis on oxidative DNA damage and lipid peroxidation induced by ROS in non cellular and cellular system. DPPH radical, hydroxyl radical and hydrogen peroxide scavenging assay were used to measure the antioxidant activities. Phi X-174RF I plasmid DNA cleavage assay and intracellular DNA migration assay were used to evaluate the protective effect on oxidative DNA damage. MTT assay and lipid peroxidation assay were used for evaluating the protective effect on oxidative cell damage. It was found to scavenge DPPH radical, hydrogen peroxide and hydroxyl radical and it inhibited oxidative DNA damage, lipid peroxidation and cell death induced by hydroxyl radical. These data indicate that Schisandra chinensis possesses a spectrum of antioxidant and DNA-protective properties