• 한국자원식물학회지
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• 제29권5호
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• pp.588-597
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• 2016

Little attention has been paid to the functional aspect of the flower petal of Paeonia lactiflora, compared to that of its root. To determine the components of flower petal of Paeonia lactiflora, we conducted the Fourier transform ion cyclotron resonance (FT-ICR) MASS spectrophotometric analysis. We detected the 24 different types of ingredients from the 70% ethanol extracts of flower petal of peonia lactiflora cv. ‘Red Charm’. The main compounds were quercetin glucopyranosides, methyl gallate, paonioflolol and kaemperol glucopyranosides. We further tested its functional activity. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of the extracts was 87.9-90.4% at 0.1mg/ml. This result showed that these flower extracts have approximately 5-fold stronger antioxidant potential than a previous report with root extracts (Bang et al. 1999). The result of tyrosinase inhibition assay of Paeonia lactflora extract was almost similar to that of arbutin except significantly higher effect in the coral sunset extract at 0.1% concentration. Hyaluronidase inhibition assay showed 76.5% inhibition at 5% concentration of this flower extract, indicating that Peaonia lactiflora flower extracts have the major anti-inflammatory, anti-oxidant and brightening effects. Taken together, these results suggest these three Paeonia lactiflora species extracts might provide the basis to develop a new natural brightening agent.

• Toxicological Research
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• 제28권4호
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• pp.241-248
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• 2012

Exposure of cells to ultraviolet B (UVB) radiation can induce production of free radicals and reactive oxygen species (ROS), which damage cellular components. In addition, these agents can stimulate the expression of matrix metalloproteinase (MMP) and decrease collagen synthesis in human skin cells. In this study, we examined the anti-photoaging effects of extracts of Tetraselmis suecica (W-TS). W-TS showed the strongest scavenging activity against 2,2-difenyl-1-picrylhydrazyl (DPPH) and peroxyl radicals, followed by superoxide anions from the xanthine/xanthine oxidase system. We observed that the levels of both intracellular ROS and lipid peroxidation significantly increased in UVB-irradiated human skin fibroblast cells. Furthermore, the activities of enzymatic antioxidants (e.g., superoxide dismutase) and the levels of non-enzymatic antioxidants (e.g., glutathione) significantly decreased in cells. However, W-TS pretreatment, at the maximum tested concentration, significantly decreased intracellular ROS and malondialdehyde (MDA) levels, and increased superoxide dismutase and glutathione levels in the cells. At this same concentration, W-TS did not show cytotoxicity. Type 1 procollagen and MMP-1 released were quantified using RT-PCR techniques. The results showed that W-TS protected type 1 procollagen against UVB-induced depletion in fibroblast cells in a dose-dependent manner via inhibition of UVB-induced MMP-1. Taken together, the results of the study suggest that W-TS effectively inhibits UVB-induced photoaging in skin fibroblasts by its strong anti-oxidant ability.

• 생명과학회지
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• 제19권4호
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• pp.520-525
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• 2009

영아형 바텐병은 PPT1 결핍 및 기능장애로 인해 발병하며, 12,500명 당 1명의 발병률을 가진 신경 퇴행 질환이다. 전 세계적으로 수많은 연구가 진행 중 이지만, 아직 명확하게 밝혀진 발병원인 및 치료방법에 대해서는 알려지고 있지 않다. 본 연구에서는 뇌에서 풍부하게 발현되는 neurogranin의 발현수준이 WT과 EBD KO 쥐에서 어떤 변화를 보이는지 확인하기 위해 mRNA, 단백질, 배양된 neurospheres를 이용하여 실험을 수행하였다. real-time PCR을 통한 neurogranin의 발현수준 비교 결과 WT에서는 노화와 무관하게neurogranin mRNA 수준에 차이가 없었으나, EBD KO 쥐에서는 노화가 진행됨에 따라 neurogranin mRNA 발현수준이 감소하였으며, 뇌에서 추출된 단백질을 이용한 western blot 분석에서도 real-time PCR과 동일한 결과를 확인할 수 있었다. 또한 WT, EBD KO 쥐의 태아로 부터 neural stem cell 인 neurospheres를 배양하여 western blot 분석을 수행한 결과 PPT1 결핍에 의해 neurogranin의 정상적인 인산화에 문제가 발생함을 확인하였다. 이러한 결과들을 바탕으로 neurospheres에 산화스트레스 유발물질인 $H_2O_2$를 처리하였고, 24시간 경과 후 항산화제인 NAC을 처리하자 $H_2O_2$를 처리한 시료에서는 mock control인 인산화된 neurogranin에 비해 그 수준이 증가하였으며, $H_2O_2$ 처리 후 NAC을 투여한 시료의 인산화 수준은 mock control 보다는 높았지만 $H_2O_2$만을 처리한 시료 수준보다 neurogranin의 인산화 정도가 감소하는 결과를 확인하였다. 이러한 결과들을 통해 PPT1 결핍으로 인해 신경세포 내에 과다하게 인산화된 neurogranin이 존재하며, neurogranin 인산화 정도는 세포가 지닌 산화스트레스 정도에 의해 변화함을 알 수 있었다. 또한 항산화제를 사용하여 세포의 산화스트레스 수준을 감소시킬 경우 neurogranin의 기능을 정상적으로 회복시킬 수 있는 가능성을 확인하였다.

• 한국식품영양과학회지
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• 제46권1호
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• pp.18-25
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• 2017

본 연구는 삼채의 조추출물과 유기용매 분획물들을 가지고 DPPH 라디칼 소거 활성에 의한 항산화 활성 검색 결과 디클로로메탄($CH_2Cl_2$) 분획물과 에틸아세테이트(EtOAc) 분획물에서 라디칼 소거 활성을 나타냈으며, xanthine oxidase 억제 효과는 DPPH 활성 라디칼 소거 활성에서 제일 뛰어났던 에틸아세테이트 분획물에서, superoxide 소거 활성은 헥산(n-hexane) 분획물에서 활성이 나타났다. RAW 264.7 세포에 lipopolysaccharide로 자극을 주고 삼채 주정 추출물 및 유기용매 분획물들을 처리하여 확인해본 결과, 조추출물과 물 분획물을 제외한 나머지 유기용매 분획물에서 염증유발 인자(NO, $PGE_2$, iNOS, COX-2, IL-6 및 $IL-1{\beta}$) 생성억제 효과가 나타났으며, 그중 디클로로메탄 분획물과 에틸아세테이트 분획물에서 억제 효과를 확인할 수 있었다. 본 실험 결과 삼채 조추출물과 유기용매 분획물에서 항산화 효과 및 염증 유발 인자의 생성 억제 효과가 나타났으며, 이러한 결과 삼채에서 유효성분 추출을 통한 항산화, 항염증 물질의 연구 또는 예방하거나 치료할 수 있는 염증 억제 성분의 분리 및 그 작용기전 연구에 중요한 기초 자료가 될 것이라 생각한다.

• 대한임상검사과학회지
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• 제48권2호
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• pp.62-67
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• 2016

600여 종의 제주 천연 추출물을 이용하여 항산화 효과를 스크린한 결과, 조록나무 잎 추출물이 가장 높은 항산화 효과를 나타내었다. 조록나무는 조록나무과에 속하는 상록 나무로써 제주 천연자원이다. 본 연구에서는 극성이 다른 유기용매(헥산, 메틸렌 클로라이드, 에틸 아세테이트, 부탄올, 물)로 순차적으로 분획 한 조록나무 물질 5가지를 이용하여 항산화 효과 및 간세포와 폐세포를 이용하여 세포 보호능을 확인하였다. 에틸 아세테이트 분획물질은 0.5 mg/mL에서 약93%로 가장 우수한 DPPH 라디칼 소거능을 보이며 양성 대조군으로 사용한 quercetin 보다 높은 효능을 보였다. 총 페놀 함량을 확인 한 결과, 에틸 아세테이트 분획물질은 505 mg GAE/g로 가장 높은 총 페놀 함량을 보였으며, 모든 추출물에서 DPPH 라디칼 소거능과 연관성 있는 결과를 보였다. 또한 에틸 아세테이트 분획물질은 $H_2O_2$에 대한 산화적 스트레스로부터 다른 분획 물질보다 높은 세포보호효과를 나타내었다. 본 연구를 통해 조록나무의 에틸 아세테이트 분획물질의 높은 항산화 효과를 확인하였으며, 천연 항산화 소재의 가능성이 높을 것으로 사료된다.

• 대한본초학회지
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• 제33권3호
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• pp.37-43
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• 2018

Objectives : Butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA) were well known as anti-oxidant, but they were limited to use because of toxicity. So, many studies are being done to develope natural anti-oxidant. Total phenolic and flavonoid contents along with total antioxidant capacity of the ethanolic extract of Plantaginis Herba (PH) were evaluated to explore the reliable and potential sources of novel natural antioxidants. Methods : Total polyphenol contents and total flavonoid contents in PH ethanol extract were determined by colorimetric method. And DPPH(1.1-diphenyl-2-picrylhydrazyl), ABTS(2'-azino-bis (3-ethylbenzothiazoline-6-Surfonicacid)) free radical scavenging capacity and reducing power inhibition activities of PH ethanol extract were measured at 100, 500, 1000, $5000{\mu}g/m{\ell}$ concentrations by spectrometric assay. Results : The total polyphenol contents and total flavonoid contents of the extract were 161.99 mg/g, 144.05 mg/g, respectively. Also, DPPH, ABTS free radical scavenging capacity and reducing power of PH ethanol extract in treated concentrations (100, 500, 1000, $5000{\mu}g/m{\ell}$) increased dose dependently. In particular, DPPH free radical scavenging capacity of PH ethanol extract from $500{\mu}g/m{\ell}$ was significantly increased compared to positive control (BHA). ABTS free radical scavenging capacity of PH ethanol extract from $1000{\mu}g/m{\ell}$ was significantly higher than BHA. Also, reducing power showed that PH ethanol extract from $500{\mu}g/m{\ell}$ was significantly increased compared to BHA. Conclusions : These results suggest that PH ethanol extract has effects to scavenge free radicals, thus PH has potential and applicable benefits for development of materials and products to have anti-oxidation functions.

• 한국응용과학기술학회지
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• 제37권5호
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• pp.1306-1313
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• 2020

본 연구의 목적은 LPS로 자극된 RAW264.7 대식세포에서 Sapindus mukorossi 열매 추출물(SME)의 항산화 효능을 확인하는 것이다. 그 결과, SME가 LPS로 자극된 RAW264.7 세포에서 ROS 생성을 현저하게 감소시켰고 전염증성 단백질인 COX-2 및 iNOS의 발현을 억제하였다. 또한 SME는 HO-1 및 Nrf2 발현을 상향 조절하였고 Akt 및 GSK-3β의 인산화를 증가시켰다. 이러한 결과는 SME가 Nrf2/HO-1 신호전달 경로의 활성화를 통하여 산화적 스트레스를 완화시킬 수 있음을 시사한다.

• 생약학회지
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• 제47권3호
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• pp.204-210
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• 2016

Phytochemical investigation of the 80% MeOH extract from the stems of Lagerstroemia indica resulted in the isolation of eighteen compounds; four norsesquiterpenes, fourteen phenolic derivatives. Their chemical structures were characterized by spectroscopic methods to be tachioside (1), isotachioside (2), 2,4,6-trimethoxyphenyl ${\beta}$-D-glucopyranoside (3), gallic acid 4-methyl ether (4), protocatechuic acid (5), gallic acid (6), vanillic acid (7), vanillin (8), 2-methoxy-5-hydroxymethyl-phenyl-1-O-(6"-galloyl)-${\beta}$-D-glucopyranoside (9), 2,4,6-trimethoxyphenol-1-O-${\beta}$-D-(6'-O-galloyl)-glucopyranoside (10), 4-hydroxy-3-methoxyphenyl-1-O-(6'-O-galloyl)-${\beta}$-D-glucopyranoside (11), vomifoliol (12), vomifoliol 9-O-${\beta}$-D-glucopyranoside (13), 6R,9R-3-oxo-${\alpha}$-ionol-9-O-${\beta}$-D-glucopyranoside (14), dihydrophaseic acid 4'-O-${\beta}$-D-glucopyranoside (15), ${\beta}$-hydroxypropiovanillone 3-O-${\beta}$-D-glucopyranoside (16), myrciaphenone A (17), and coumaric acid (18). Compounds 1-5 and 7-18 were isolated for the first time from this plant. Compounds 1-18 were investigated for their antioxidant properties using DPPH and ABTS radical scavenging capacity assay, $Fe^{2+}$ chelating, and FRAP assay. It was found that 4, 6, and 11 possessed the highest antioxidant capacities.

• 혜화의학회지
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• 제20권2호
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• pp.53-65
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• 2012

In order to investigate the possibility of SHT as therapeutic for the treatment of atopic dermatitis (AD), cytotoxicity, anti-oxidant activity, modulatory and suppression activities of SHT were tested. 90% or higher cell viability was observed in all tested groups from 25 to 200 ug/ml using Raw 264.7 cells. SHT showed dose-dependent DPPH scavenging activity, with more than 80% scavenging activities at 400 and 800 ug/ml concentrations. SHT showed dose-dependent suppression activity of ROS production, especially at 200 ug/ml of 57.4%. SHT decreased NO production activity dose dependently, expecially at 200 ug/ml of 28.8%. IL-$1{\beta}$, IL-6, MCP-1, TNF-${\alpha}$ production rate were decreased by 45.7%, 15.5%, 8.9%, 16.5% respectively when Raw 264.7 cells were treated with LPS and with SHT of 200 ug/ml. However, only IL-6 and TNF-${\alpha}$ showed significant changes. The results above indicate that SHT significantly reduces the effect of oxidative and inflammatory cytokines. The use of SHT in dermatitis can be widely suggested.

• 인간식물환경학회지
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• 제23권2호
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• pp.191-199
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• 2020

Noni has been used for medicinal purposes for more than 2,000 years in South Pacific Polynesia, China and India, and has been heavily ingested as an extract for its excellent antioxidant and anti-inflammatory effects. However, a recent study found that the noni extract causes digestive disorders, kidney problems, and liver diseases, which made it necessary to use it for other purposes than as an extract. In this study, we want to evaluate the potential of noni as an anti-oxidant, anti-inflammatory and anti-wrinkling agent. Methods: Noni was freeze-dried, extracted in water, and concentrated. Skin cells were treated with the noni extract for 24 hrs and then were exposed to UVB (55 mJ/cm²). After 48 hrs of incubation, pro-inflammatory cytokine, elastase, MMP-1 and type-1 procollagen levels were measured by ELISA. Results: To find out the antioxidant effect of the noni extract, the DPPH and ABTS radical scavenging activity experiments were conducted and the noni extract showed 97.0 % and 92.0 % antioxidant efficacy at 200 ㎍/mL respectively. The noni extract (50 and 100 ㎍/mL) decreased IL-6 and TNF-α in RAW 264.7 cells induced by LPS in a concentration-dependent manner. In the RT-PCR experiment involving NO production, the noni extract (50 and 100 ㎍/mL) inhibited NO production by strongly inhibiting iNOS mRNA expression, and also inhibited the elevation of MMP-1 and elastases caused by UVB irradiation by 25.0 % and 7.0 % respectively. In addition, type-1 procollagen was elevated by 20.0 % by the noni extract treatment in HaCaT cells. Conclusion: The noni extract has photoprotective ability by reducing proinflammatory mediators, elastase and MMP-1 production, and elevation of collagen synthesis. Our findings suggest that the noni extract might be a good natural substance to protect against UVB-induced premature skin aging.