• Journal of Physiology & Pathology in Korean Medicine
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• v.18 no.3
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• pp.893-899
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• 2004

To test the cytoprotective effect of sophorae radix (SR) against hydrogen peroxide (H₂O₂)-induced cytotoxicity, we investigated the cell viability using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay in the presence of ethyl acetate subfractions of SR water extracts In H9c2 cells. And to clarify the cytoprotective mechanism of SR extracts, we evaluated the cellular glutathione (GSH) contents in the presence of subfraction 1, 2, 3, and 4 of SR ethyl acetate soluble fractions. Among 1 -12 subfractions of SR ethyl acetate soluble fractions, 1, 2, 3 and 4 subfractions have an efficacy inhibiting the cytotoxicity induced by H₂O₂ in H9c2 cells. Also, the protective effects of 1, 2, 3 and 4 subfractions of SR ethyl acetate soluble fractions resulted from the anti-oxidant effects. These results suggest that ethyl acetate soluble fractions of SR water extracts is effective in the prevention of H₂O₂-induced cytotoxicity and 1, 2, 3 and 4 subfraction of ethyl acetate soluble fractions possess the anti-oxidant component.

• Korean Journal of Pharmacognosy
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• v.48 no.1
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• pp.25-30
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• 2017

This study was performed to evaluate the lifespan extending effects of the dried ginger (Zingiber officnale Roscoe, Zingiberaceae). Ethanol extract of the dried ginger was successively partitioned as methylene chloride, ethyl acetate, n-butanol and $H_2O$ soluble fractions, and lifespan-extending effects of the fractions were investigated using Caenorhabditis elegans model system. Ethyl acetate-soluble fraction showed the most potent longevity property. Furthermore, ethyl acetate-soluble fraction elevated thermal stress tolerance, and increased expression of stress resistance protein. Further studies were performed to investigate several aging-related factors such as reproduction, food intake, growth and movement of C. elegans. The results revealed that there were no significant changes in aging-related factors including reproduction, food intake and growth, however, ethyl acetate-soluble fraction treatment led to an up-regulation of locomotory ability of aged worms, suggesting ethyl acetate-soluble fraction affected healthspan as well as lifespan of nematode.

• Korean Journal of Medicinal Crop Science
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• v.13 no.2
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• pp.110-114
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• 2005

Extracts from sawdust of Pinus densiflora were showed antifungal activity against Lentinula edodes. It was extracted by hot water and then successively extracted by n-hexane, ethyl acetate, and methanol. The yields of the n-hexane-soluble, ethyl acetatesoluble, methanol-soluble and methanol-insoluble fractions of water extracts were 8.2%, 10.6%, 32.0%, and 49.2%, respectively. The ethyl acetate-soluble fraction showed the greatest antifungal activity against L. edodes: 41.5% inhibition at 1,000 ppm. However, there were not significant differences of antifungal activities between n-hexane-soluble fraction and methanol-soluble fraction at a concentration of 1,000 ppm. The hot water extracts showed 23.5% of antifungal activity against L. edodes at a concentration of 1000 ppm. The four antifungal compounds were separated from ethyl acetate fraction by thin layer chromatography.

• Korean Journal of Pharmacognosy
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• v.48 no.1
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• pp.63-69
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• 2017

Saururus chinensis (Lour.) Baill. (Saururaceae) has been used as a traditional medicine for the treatment of dysuria, leukorrhea, eczema, jaundice and ascites in Korea, China and Japan. Ethanol extract of S. chinensis was successively partitioned as methylene chloride, ethyl acetate, n-butanol and $H_2O$ soluble fractions. Among those fractions the ethyl acetate soluble fraction showed the most potent DPPH radical scavenging and superoxide quenching activities. To verify antioxidant activities of ethyl acetate fraction, we checked the activities of superoxide dismutase (SOD) and catalase, and intracellular ROS level and oxidative stress tolerance in Caenorhabditis elegans. Furthermore, to see if increased stress tolerance of worms by treating of ethyl acetate fraction was due to regulation of stress-response gene, we quantified SOD-3 expression using transgenic strain. Consequently, ethyl acetate fraction elevated SOD and catalase activities of C. elegans, and reduced intracellular ROS accumulation in a dose-dependent manner. Moreover, ethyl acetate fraction-treated CF1553 worms exhibited significantly higher SOD-3::GFP intensity.

• Natural Product Sciences
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• v.9 no.4
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• pp.210-212
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• 2003

In the present study Momordica dioica fruit pulp was successively extracted with hexane and methanol. To the concentrated methanolic extract ethyl acetate was added and ethyl acetate soluble portion was separated. Both hexane extract (HE) and ethyl acetate soluble portion (EASP) of methanolic extract was vacuum dried to yield the respective HE and EASP. HE and EASP were evaluated for its analgesic and anti-inflammatory activities in a dose of 50 and 100 mg/kg in mice and rats. Both HE and EASP significant exhibited analgesic and anti-inflammatory activities when compare to standard drug.

• Preventive Nutrition and Food Science
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• v.15 no.1
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• pp.36-43
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• 2010

The purpose of this study was to investigate the phenolic acid, proanthocyanidin (PAs), and flavonol glycoside contents, as well as the antioxidant activities of pine needle extracts from six species of young pine trees. The extracts were prepared from Section Pinus (Diploxylon): P. densiflora, P. sylvestris, P. pinaster and P. pinea, and Section Strobus (Haploxylon): P. koraiensis and P. strobus. Phenolics were extracted from pine needles with 80% acetone to obtain the soluble free fraction, and insoluble residues were digested with 4 M NaOH to obtain bound ethyl acetate and bound water fractions. Phenolics were analyzed by HPLC, and the hydrophilic antioxidant activity was measured using oxygen radical absorbance capacity (ORAC). Total phenolic and flavonoid contents of the soluble free fraction were higher than those of the bound ethyl acetate and bound water fractions. The main phenolics were monomers and polymers of PAs in the soluble free fraction, and phenolic acids and flavonol glycosides in bound ethyl acetate fraction. Flavonol glycosides found in different species of pine needles were qualitatively similar within fractions, but composition varied among Pinus sections. High levels of kaempferol arabinoside and an unknown compound were present in all Strobus species. The soluble free fraction had the highest antioxidant activity, followed by bound ethyl acetate and bound water fractions.

• Korean Journal of Pharmacognosy
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• v.48 no.4
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• pp.314-319
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• 2017

To evaluate the longevity property of Allium hookeri (Liliaceae) leaves, this study was performed. Ethanol extract of A. hookeri was successively partitioned as methylene chloride, ethyl acetate, n-butanol and $H_2O$ soluble fractions, and lifespan-extending effects of the fractions were checked using Caenorhabditis elegans model system. The most active ethyl acetate-soluble fraction elevated heat stress tolerance, and increased expression of stress resistance protein. Further studies were performed to investigate several aging-related factors such as reproduction, food intake, growth and movement of C. elegans. The results revealed that there were no significant changes in aging-related factors including reproduction and food intake, however, ethyl acetate-soluble fraction treatment led to up-regulation of locomotory ability and growth of aged worms, suggesting ethyl acetate-soluble fraction affected healthspan as well as lifespan of nematode.

• Toxicological Research
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• v.12 no.1
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• pp.41-46
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• 1996

This study was performed to investigate the antitoxic component in methanol fraction of Lonicerae fios. The results were as follows: 1. When a 500 ppm of water soluble fraction of Lonicerae flos was administered, it showed the highest antitoxic effect. 2. Generally, detoxication effects by methanol fraction of Lonicerae fios increased. When the ethyl acetate soluble fraction of Lonicerae rios was administered, it exhibited the highest antitoxic effect against the toxicity of cadmium in Liver. 3. The combined administration of cadmium and methanol fraction of Lonicerae rios significantly increased metallothionein in liver compared to administration of cadmium only. This phenomenon was more remarkable when the ethyl acetate soluble fraction of Lonicerae fios was administered with cadmium chloride.

• Journal of Society of Preventive Korean Medicine
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• v.5 no.2
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• pp.106-113
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• 2001

The Cytotoxic activity of the ethyl acetate soluble fraction of Perilla frutescens on human oral epithelioid carcinoma cell lines was evaluated by 3-(4,5-dimethylthiazol- 2-yl)-2,5-diphenyl-2H-tetrazalium bromide (MTT) colorimetric method. The light microscopic study was carried out to observe the morphological changes of cultured human oral epitheloid carcinoma cell lines (KB) These results were obtained as follows; 1. subfraction 1 of the ethyl acetate soluble fraction of perilla frutescens was shown significant cytotoxic activity (p<0.001) at 10-2 mg/ml concentration, this concentration was decreased the cytotoxic activity of 70.3% . 2. The comparison of IC50 values of various subfractions in human oral epithelioid carcinoma cell lines was exhibited that their susceptibility to these subfractions decreased in the following order ; subfraction 5 > subfraction 4 > subfraction 3 > subfraction 2 > subfraction 1 by MTT assay. In light microscopy, the subfraction 1 of the ethyl acetate soluble fraction of Perilla frutescens showed the highest cytotoxic activity. These findings suggest that subfraction 1 possessed the most cytotoxic constituents.

• Korean Journal of Pharmacognosy
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• v.51 no.2
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• pp.115-121
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• 2020

Caenorhabditis elegans model system was used to investigate the antioxidant activity of methanol extract of Mallotus japonicus twigs. The ethyl acetate soluble fraction of the M. japonicus methanol extract showed the best DPPH radical scavenging activity. The ethyl acetate fraction was measured for the activity of superoxide dismutase (SOD), catalase, and oxidative stress tolerance by using C. elegans along with reactive oxygen species (ROS) level. In addition, to confirm that the regulation of the stress response gene is responsible for the increased stress tolerance of C. elegans treated by the ethyl acetate fraction, SOD-3 expression was measured using a transgenic strain. As a result, the ethyl acetate fraction increased SOD and catalase activity, and decreased ROS accumulation in a dose-dependent manner. In addition, the ethyl acetate fraction-treated CF1553 worm showed higher SOD-3::GFP intensity than the control worm.