• 약학회지
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• 제39권5호
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• pp.560-564
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• 1995

Thirty ellagitannins originated from some Euphorbiaceous plants were tested for the inhibitory activities against AMV reverse transcriptase and replication of HIV-1 using syncytia forming assay. Most of ellagitannins showed strong inhibitory activities against AMV reverse transcriptase. Some ellagitannins including geraniin, mallotusinin, elaeocarpusin, euphorscopin and jolkianin, showed significant inhibitory activities of syncytia formation of supT1 cell line.

• 한국약용작물학회지
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• 제20권4호
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• pp.222-230
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• 2012

We evaluated the inhibitory effects of extracts and components of Geranium thunbergii on aldose reductase (AR) and galactitol formation in rat lenses with high levels of galactose as a part of our ongoing search of natural sources for therapeutic and preventive agents for diabetic complications. The inhibitory effects of water, methanol and ethanol extracts of G. thunbergii on rat lens AR (RLAR) were determined. Comparing inhibitory effects of various solvent extracts, ethanol extract showed RLAR inhibitory activity ($IC_{50}$ values, 5.24 and $6.39{\mu}g/m{\ell}$, respectively). The ethanol extract was fractionated to chloroform, ethyl acetate and water. Of these, the ethyl acetate fraction from ethanol extract of G. thunbergii exhibited RLAR inhibitory activity ($IC_{50}$ value, $2.64{\mu}g/m{\ell}$). In order to identify the bioactive components of ethyl acetate soluble fraction of ethanol extract from G. thunbergii, eight compounds, namely gallic acid (1), protocatechuic acid (2), p-hydroxybenzoic acid (3), brevifolin carboxylic acid (4), geraniin (5), ellagic acid (6), kaempferol-3-O-arabinofuranosyl-7-O-rhamnopyranoside (7), kaempferitrin (8) were isolated. The isolates were subjected to in vitro bioassays to evaluate their inhibitory activity on RLAR and galactitol formation in rat lenses. The ellagic tannins (5, 6) and flavonoid (7) exhibited strong inhibitory effects on RLAR. Also, these three compounds (5, 6 and 7) suppressed galactitol accumulation in rat lens under high galactose conditions, demonstrating the potential to prevent galactitol accumulation exo vivo. These results suggest that the extracts and components of G. thunbergii are a promising agent in the prevention or treatment of diabetic complications.

• Natural Product Sciences
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• 제12권3호
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• pp.125-128
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• 2006

A chemical examination of the stems of Sapium japonicum PAX et $H_{OFFM}$ (Euphorbiaceae) has led to the isolation of seven phenolic compounds. On the basis of UV, IR, MS, and NMR spectral data and the chemical reaction, the structures of these compounds were identified as gallic acid (1), ellagic acid (2), 3,3'-di-O-methylellagic acid (3), $4-O-({\beta}-D-xylopyranosyl)-3,3'-di-O-methylellagic$ acid (4), $4-O-({\alpha}-D-arabinofuranosyl)-3,3'-di-O-methylellagic$ acid (5), isoquercitrin (6), and geraniin (7).

• 생약학회지
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• 제25권2호
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• pp.105-112
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• 1994

A chemical examination of the aqueous acetone extract of the leaves of Securinega suffruticosa has led to the isolation of nine phenolic compounds. On the basis of chemical and spectroscopic evidences, the structures of these compounds were established to be gallic acid(1), corilagin(2), helioscopinin B(3), geraniin(4), bergenin (5), norbergenin(6), 11-O-galloyl norbergenin(7), gallocatechin(8) and rutin(9).

• 생약학회지
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• 제24권1호
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• pp.20-25
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• 1993

Three phenolcarboxylic acids, two flavonoids and four hydrolysable tannins were isolated from the whole plant of Acalypha australis. On the basis of chemical and spectroscopic evidence, the structures of these compounds were established as gallic acid, protocatechuic acid, caffeic acid, rutin, isoquercitrin, corilagin, furosin and geraniin.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2010년도 심포지엄 및 추계학술발표회
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• pp.430-430
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• 2010

In this study ethanol extracts of aerial part of Geranium thunbergii Sieb. et Zucc. was investigated for their ability to inhibit a-glucosidase, and thus was fractionated using two organic solvents, including dichloromethane, ethyl acetate. The ethyl acetate-soluble fraction, which manifested potent enzyme inhibitory properties, was then followed by tracking down the active compound by combining HPLC micro-fractionation to an enzyme assay in 96-well plate. The ${\alpha}$-glucosidase inhibitory activity profile showed that two peaks exhibited potent inhibitory activity, and then the structural analyses of the two peaks were carried out by HPLC-UV-MS. The main ${\alpha}$-glucosidase inhibitory compounds in the ethyl acetate-soluble fractions of ethanol extracts of Geranium thunbergii Sieb. et Zucc. were tentatively identified as geraniin and kaempferol-7-rhamnoside.

• 대한화장품학회지
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• 제37권1호
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• pp.61-66
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• 2011

본 연구는 이질풀 추출물의 항산화 효능에 관한 연구로, 항산화 및 항노화의 기능성 화장품 소재로서의 개발 가능성을 확인하고자 하였다. 이질풀의 주요 성분으로는 tannin, (-)epicatechin, kaempferitin, kaepferol-7-rhamnoside, brevifolin, corilagin, pyrogallol, ellagitannin, geraniin, gallic acid, succinic acid, quercetin, protocatechuic acid 등이 보고되어 있다. DPPH 라디칼 소거능 평가를 통한 이질풀 추출물의 항산화 효능을 측정한 결과, 대조군인 quercetin과 비교하여 우수한 소거 활성을 확인할 수 있었다. 동일 농도($50\;{\mu}g/mL$)를 처리하였을 때 이질풀 추출물의 DPPH 라디칼 소거능은 약 98.33 %로 측정되었으며, quercetin의 경우 78.05 %로 측정되었다. Human keratinocyte (HaCaT)에 이질풀 추출물을 처리하여 세포내 Reactive Oxygen Species (ROS) 생성 저해능을 측정한 결과, $IC_{50}$값은 이질풀 추출물과 quercetin에서 각각 43.22, $102.35\;{\mu}g/mL$로 측정되어 이질풀 추출물의 우수한 항산화 효능을 확인할 수 있었다. 또한 피부 자극 테스트 및 세포 독성 평가를통하여 이질풀 추출물이 피부에 자극을 유발시키지 않는 안전한 소재임을 확인하였다.

• Food Science and Biotechnology
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• 제15권4호
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• pp.617-624
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• 2006

Various plant phenolics were assessed for (${\beta}$-secretase (BACE1) inhibitory activity in order to screen for anti-dementia agents. Among 39 phenolics, eight compounds, 1,2,3-trigalloyl glucopyranoside, acetonyl geraniin, euphorscopin, furosine, helioscopinin A, helioscopinin B, jolkinin, and rugosin E exhibited strong inhibition of BACE1 with $IC_{50}$ values of $5.87{\times}10^{-8}-54.93{\times}10^{-6}\;M$. Among them, rugosin E was the most potent ($IC_{50}$ $5.87{\times}10^{-8}\;M$). The active compounds were shown to be non-competitive inhibitors by Dixon plot. All the phenolic BACE1 inhibitors except furosin also suppressed prolyl endopeptidase (PEP) activity. However, these phenolic compounds caused less inhibition of ${\alpha}$-secretase (tumor necrosis factor a converting enzyme; TACE) and no significant inhibition of other serine proteases such as trypsin, chymotrypsin, and elastase was seen, demonstrating that they are relatively specific to both BACE1 and PEP. No significant structure-activity relationships were found.

• 대한본초학회지
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• 제34권2호
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• pp.59-66
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• 2019

Objectives : Decrease in muscle mass and loss of muscle function due to aging are associated with various diseases. As interest in healthy aging increases, efforts to prevent and treat muscle hypoxia as an illness are increasing. Considering the physical limitations, a pharmacologic approach to the treatment of myopenia is needed. Methods : Terminalia chebula Rets has a wide range of pharmacological effects and is used as a medicinal product in traditional medicine. However, the drug effect on the treatment of muscle disorders has not been revealed. The purpose of this study was to evaluate the value of water extract of Terminalia chebula (WETC) as a therapeutic agent to relieve symptoms of muscle hypoxia. Results : WETC showed strong radical scavenging ability. In addition, WETC increased cell activity of myoblast, and we observed that WETC induces myoblast differentiation by immunoblot analysis using differentiation protein markers as well as cell morphology of myoblast. Based on these results, we examined the effect of chebulic acid, chebulagic acid, gallic acid, geraniin, and punicalagin on cell activity and differentiation of myoblasts. Gallic acid significantly increased cell activity of myoblast, and it was found to be an effective substance which not only induces myoblast differentiation but also promotes proliferation. Conclusions : We suggest that the WETC with antioxidant effect and its indicator gallic acid on cell activity, proliferation and differentiation of myoblast can be studied and developed as a food and medicine for prevention and treatment of various muscle diseases.