• KSBB Journal
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• 제31권1호
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• pp.14-19
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• 2016

To investigate the effect of peanut sprout extract on skin care, we measured anti-oxidant activity and whitening action. As a result of measuring DPPH radical scavenging activity to examine independent anti-oxidation of peanut sprout extract, there was strongly scavenging activity. Fluorescent material DCF-DA was used to measure hydrogen peroxide created in RAW 264.7 cells, and all concentration dependently decreased ROS production. As a result of measuring nitric oxide to examine anti-inflammation of peanut sprout extract, there was strongly inhibited nitric oxide production in RAW 264.7 cells. Tyrosinase activation was found to inhibited dose-dependant. Melanin production was also prevented dose-dependant. Therefore, it is expected to be used effectively in development of functional cosmetic materials.

• 한국식품영양과학회지
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• 제39권12호
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• pp.1819-1825
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• 2010

인삼정과 제조 시 이용되는 당 용액 대신에 올리고당 함량이 높은 맥문동의 열수추출액을 이용하여 인삼정과를 제조한 후 품질 특성을 조사하였다. 맥문동 추출액으로 제조한 인삼정과는 가용성 무질소물인 탄수화물의 함량이 76.40%로 설탕으로 제조한 인삼정과의 80.01%에 비하여 약 4% 정도 낮았고, 조단백질 및 조회분 함량은 각각 1.46% 및 3.49%로 일반인삼정과의 0.59% 및 0.96%에 비하여 약 3배 이상 높았다. 맥문동 열수추출액을 이용한 인삼정과에서 유리당 조성 및 함량은 fructose가 32.42%로 가장 많았고, 그 외 올리고당이 16.91%, 설탕 및 이당류가 13.91%, glucose가 13.16%이었으며, Rh2를 비롯한 진세노사이드 11종이 검출되어 총 함량이 740.1 mg%로 일반 인삼정과(675.6 mg%)보다 더 높았다. 총 페놀화합물과 플라보노이드 함량은 각각 5.46과 0.016%로 일반인삼정과의 5.02와 0.014%보다 높았다. 맥문동 열수추출액으로 제조한 인삼정과의 항산화활성은 DPPH $IC_{50}$값이 인삼정과 중량기준으로 약 34.5 mg/mL 이었으며, hydrogen peroxide 소거능은 $50{\mu}g$/mL의 농도에서 92%의 소거능을 보여주었다.

• 한국자원식물학회지
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• 제29권1호
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• pp.11-19
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• 2016

본 연구에서는 익모초 추출물의 항산화 효과 및 자외선으로 유도된 각질형성세포 손상에 대한 보호효과를 확인하고자 익모초 열수 추출물의 생체 내 산화적 스트레스와 관련되어 있는 DPPH radical, hydroxyl radical, hydrogen peroxide, superoxide radical, lipid peroxidation에 대한 익모초 열수추출물의 소거효과 및 환원력 평가 시험을 진행하였으며, 사람 각질형성세포주인 HaCaT 세포주에서 UVB로 유도된 apoptosis에 대한 익모초의 억제 정도를 확인하였다. 그결과, 익모초 열수추출물에서 농도 의존적으로 항산화 효과가 증가함을 확인할 수 있었으며, UVB로 유도된 apoptosis에 발현 또한 억제됨을 확인할 수 있었다. 현재 국내외적으로 천연물에 대한 항산화 활성에 대한 연구가 활발히 진행되고 있는데, 이를 바탕으로 하는 피부 보호 효과에 대한 연구는 항노화 측면에서 그 효용가치가 높다고 여겨진다. 따라서 본 실험 연구의 결과를 토대로 항산화 효과가 우수한 식물종에 대해 단일 물질에 대한 분리 작업과 함께 항노화 실험 뿐만 아니라 항염증이나 항암 등의 실험이 더깊이 있게 진행된다면 새로운 천연물 유래 생리 활성 물질로서 효과적이면서도 안전한 화장품 소재로의 활용 또한 가능할 것으로 기대된다.

• 대한한의학방제학회지
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• 제10권2호
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• pp.127-141
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• 2002

Objectives: Haeganjeon(HGJ) has been used for the treatment of liver disease in traditional medicine. The present study was carried out to evaluate the antioxidant and protective effects of HGJ extract on oxidative damage of hepatocytes by tert-butyl hydroperoxide(t-BHP). Methods: In the linoleic acid water-alcohol system, the levels of lipid peroxide(LPO) were determined by TBA method. The scavenging effect of HGJ on ${\alpha},{\alpha}-diphenyl-{\beta}-picrylhydrazyl$(DPPH) radical was determined according to the method of Hatano. In the Fenton system(ferrous ion reaction with hydrogen peroxide), the levels of hydroxyl radical induced LPO in rat liver homogenate were determined according to the method of TBA. Inhibitory effect of HGJ on superoxide generation was measured by xanthine-xanthine oxidase system. In order to evaluate antioxidative activity of HGJ in the liver cell, cultured normal rat liver cells(Ac2F) were prepared and incubated with or without HGJ. After 18hr, cells placed in DMEM medium without serum, and then incubated with 1mM tert-butyl hydroperoxide(t-BHP) for 2hrs. Viable cells were detected by MTT assay. Conclusions: In the linoleic acid autoxidation system, HGJ extract significantly inhibited the time course of the lipid peroxidation. These effects were similar to those of BHA HGJ extracts showed about 70% scavenging effect on DPPH radical. And HGJ extract inhibited the lipid peroxide formation in rat liver homogenate induced by hydroxyl radical derived from Fenton system. In addition, HGJ extract protected the cell death induced by t-BHP and significantly increased cell viability in the normal rat liver cell. These result indicated that HGJ extract might playa protective role against oxidative hepatic cell injury by means of free radical scavenger.

• 한국식품영양과학회지
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• 제34권9호
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• pp.1297-1301
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• 2005

활나물의 항산화 효과를 측정하기 위하여 잎, 줄기, 뿌리 및 종자의 부위 별로 분리하여 methylen chloride와 ethanol 혼합용매에 의해 추출하였다. 활나물의 부위로 추출수율은 줄기 $4.47\%$, 잎 $3.95\%$, 종자 $2.90\%$, 뿌리 $2.67\%$의 순으로 줄기 부분의 추출수율이 가장 높았다. 총 페놀성 화합물 함량은 잎 2.98, 뿌리 2.34, 종자 2.26, 줄기 2.11 mg/mL로 잎추출물에서 가장 높았다. SOD 유사활성은 잎 추출물의 활성이 $86.27\%$로 가장 높았으며, 줄기와 뿌리 추출물은 각각 56.32, $50.29\%$이었으며, 종자 추출물은 경우 $16.82\%$로 가장 낮았다. 잎, 줄기, 뿌리 추출물의 SOD 유사활성은 천연항산화제 인 tocopherol보다 매우 높았다. 활나물 부위별 추출물의 전자공여능은 잎과 줄기 추출물에서 각각 16.87, $16.06\%$로 매우 높았으며, 뿌리 추출물과 종자 추출물이 각각 11.13, $9.31\%$로 tocopherol $9.28\%$보다 높았다. 활나물 부위별 추출물에 대한 hydroxy radical 소거 활성은 잎 추출물에서 $42.90\%$로 가장 높게 나타났고, 줄기, 종자, 뿌리 추출물은 각각 41.03, 37.80, $37.62\%$이었으며, 천연항산화제 인 tocopherol $32.38\%$ 이 가장 낮은 결과를 보여주었다. 종자 추출물의 hydrogen radical 소거능이 $53.51\%$로 가장 높게 나타났으며, tocopherol의 $53.81\%$와 비슷한 활성 수준을 보여 주었다. 따라서 활나물 부위 별 추출물의 항산화 효과를 측정한 결과 잎 추출물이 가장 항산화 활성이 높았으며, 활나물은 천연항산화제로의 개발 가능성이 있음을 확인할 수 있었다.

• 대한의생명과학회지
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• 제14권1호
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• pp.33-38
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• 2008

In order to examine oxidative stress of reactive oxygen species and the antioxidant effect of Citri Reticulatae Pericarpium (CRP) extract, human skin melanoma cells were treated with various concentrations of hydrogen peroxide ($H_2O_2$). Antioxidant effect of CRP extract on $H_2O_2$-induced cytotoxicity, cell viability, DPPH-radical scavenging activity and superoxide dismutase (SOD)-like activity. In this study, $H_2O_2$ decreased cell viability of cultured human skin melanoma cells in dose- and time-dependent manners, and then, midcytotoxicity value (MCV) was determined at $60\;{\mu}M$ after human skin melanoma cells were cultured for 5 hours in the media containing $20{\sim}60\;{\mu}M$ of $H_2O_2$, respectively. The $H_2O_2$ was on cultured human skin melanoma cells because MCV of $H_2O_2$ was lower than $100\;{\mu}M$. In the antioxidant effect of CRP extract, CRP extract increased cell viability DPPH-radical scavenging activity and SOD-like activity. From these results, it is suggested that $H_2O_2$ was very toxic on cultured human skin melanoma cells. And also, CRP extract has the antioxidant effect on $H_2O_2$-induced cytotoxicity.

• Advances in Traditional Medicine
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• 제8권4호
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• pp.329-338
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• 2008

The aim of the study is to investigate the antioxidant activity through, reducing power, 2, 2-diphenyl-1-picryl hydrazyl radical (DPPH), nitric oxide radical (NO), superoxide radical, hydrogen peroxide radical ($H_2O_2$) scavenging activity and the amount of total phenolic compounds of chloroform, ethyl acetate, methanol and aqueous extracts of the leaves of Talinum portulacifolium. Chloroform extract of leaves of T. portulacifolium showed highest antioxidant activity, with a direct relationship between activity and concentration of extracts ($15-240\;{\mu}g/mL$). Among all the extracts, the highest amount of the total polyphenolic compounds was found in the chloroform extract. Chloroform extract of T. portulacifolium showed an important free radical scavenging activity towards the DPPH, NO, Superoxide and $H_2O_2$ radicals, with $IC_{50}$ values of 133.26, 165.75, 156.34 and $135.29\;{\mu}g/mL$, respectively. In the lipid peroxidation assay, extracts of chloroform and ethyl acetate showed a remarkable inhibitory activity. The extracts showed significant activity in all the experiments but lower than the standard antioxidant, ascorbic acid.

• 대한의생명과학회지
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• 제14권3호
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• pp.193-198
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• 2008

In order to evaluate on the effect of kaempferol on the cytotoxicity of oxygen tree radicals, XTT assay was performed to determine the cell viability after skin fibroblasts derived from human (Detroit 51) that were treated with various concentrations of hydrogen peroxide $(H_2O_2)$. And also, the effect of kaempferol on the cytotoxicity induced by H202 that was examined by cell viability, lactate dehydrogenase (LDH) activity and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity in these cultures. $H_2O_2$ decreased cell viability in dose-dependent manner in these cultures and the $XTT_{90}\;and\;XTT_{50}$ values were determined at concentration of $35{\mu}M\;and\;90{\mu}M$ of $H_2O_2$ after skin fibroblasts derived from human were treated with $15{\sim}90{\mu}M$ of $H_2O_2$ for 6 hours, respectively. $H_2O_2$ was highly toxic on cultured skin fibroblasts derived from human by toxic criteria of Brenfreund and Puerner (1984). In the protective effect of kaempferol on $H_2O_2$-induced cytotoxicity, kaempferol increased DPPH radical scavenging activity and significantly decreased LDH activity. From these results, it is suggested that oxygen tree radical, $H_2O_2$, was highly toxic on cultured skin fibroblasts derived from human, and also kaempferol of flavonoid showed the protection on $H_2O_2$-induced cytotoxicity.

• ALGAE
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• 제21권1호
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• pp.149-156
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• 2006

The aim of the present study was to evaluate the antioxidant activity of red algae in Jeju Island. The algal extracts were obtained with MeOH and fresh water at 20 and 70°C, and screened for antioxidant activities using hydroxyl radical (HO·), superoxide anion (O2–), hydrogen peroxide (H2O2) and DPPH free radical scavenging assays. Among them, Gracilaria verrucosa methanolic extract at 20°C (20ME, 96.85%), G. textorii aqueous extract at 20°C (20AE, 88.01%), Grateloupia filicina 20AE (85.35%), and Polysiphonia japonica 20ME (94.92%) exhibited the highest scavenging activities against HO·, O2–, H2O2, and DPPH free radicals, respectively. Moreover, P. japonica (20ME and 70ME) is correlated between DPPH free radical scavenging activity and polyphenolic contents. These results indicate that some red algae in Jeju Island could be potential candidates for development of antioxidants.

• ALGAE
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• 제20권3호
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• pp.251-260
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• 2005

Antioxidative activities of Chlorophyta and Phaeophyta in Jeju Island were measured by superoxide anion ($O_2^{{\cdot}-}$), hydroxyl radical ($HO^{\cdot}$), hydrogen peroxide ($H_2O_2$) and DPPH free radical scavenging assays. Methanolic and aqueous extracts of the seaweeds were prepared at both temperatures, higher (70$^{\circ}C$) and room temperature (20$^{\circ}C$), and screened for the construction of an extract bank from seaweeds in Jeju Island. A variety of extracts showed positive effect against reactive oxygen species (ROS). Especially, Sargassum thunbergii methanolic extract at 70$^{\circ}C$ (70ME, 97.41%), S. fulvellum methanolic extract at 20$^{\circ}C$ (20ME, 84.66%), Codium fragile aqueous extract at 70$^{\circ}C$ (70AE, 96.61%) and S. thunbergii 20ME (97.44%) exhibited the highest scavenging activities against $O_2^{{\cdot}-}$, $HO^{\cdot}$, $H_2O_2$ and DPPH free radicals, respectively. Total phenolic contents also examined but did not show a positive correlation with ROS scavenging abilities (except for a few extracts). These results indicate that further investigation is needed to identify and purify the responsible antioxidative components.