• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.18 no.3
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• pp.37-43
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• 2005

This study was performed to determine the cytotoxic effect of methanol extract from Houttuynia Cordata and Glycine soja. The cell viability was determined by MTT method. Their cytotoxic activities against three cancer cell lines such as A549, MDA-MB-231 and SNU-C4 cell line were tested. Among them, The methanol extract of Houttuynia Cordata showed the strongest cytotoxic effect against SNU-C4 cells. These results suggest that the methanol extract of Houttuynia Cordata possessed a potential antitumorous agent. The free radical scavenging activity using DPPH method was the strongest of Houttuynia Cordata methanol extract and ethyl acetate fraction.

• Journal of the Korean Society of Food Science and Nutrition
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• v.41 no.8
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• pp.1035-1040
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• 2012

This study was aimed to evaluate and compare the biological activities and total phenolic content of ethanol extracts of white (Superior) and colored potatoes (Red, Rose, Haryoung, Blue, Jaseo, and Jasim). Various ethanol extracts (250, 500, 1,000, and $2,000{\mu}g/mL$) were assessed for antioxidant activities of DPPH free radicals and hydroxyl radical scavenging. The cytotoxic activity of the extracts (0, 30, 60, $100{\mu}g/mL$) was also carried out by a human cancer cell lethality bioassay method. Results showed that the DPPH and hydroxyl radical scavenging activities, of all extracts increase in a concentration-dependant manner. All color-fleshed potato extracts, except for Red and Haryoung, showed higher radical scavenging activities than the general white potato extract. Cytotoxicity of the extracts as determined in THP-1 cells showed that Blue and Jasim was highly toxic at most concentrations tested. In addition, the Blue extract had the highest cytotoxic activity on $HepG_2$ cells at the concentration $100{\mu}g/mL$. The contents of total phenolic (TPC) in the extracts significantly varied from 120.0 mg/100 g powder (Superior) to 151.1 mg/100 g powder (Blue), and TPC of all color-fleshed potato extracts was higher than that of white. The greatest positive correlation was found between phenolic contents and hydroxyl radical scavenging activity (r=0.776, p<0.05), and a strong negative correlation was found between hydroxyl radical scavenging activity and cytotoxic activities on $HepG_2$ cells (r=-0.795, p<0.05). The present study demonstrates that color-fleshed potatoes have higher antioxidant and stronger anticancer activities than general potato. These results provide useful and important information for potato breeders and researchers, in order to increase the antioxidant capacity and functional value of colored potatoes for use in the food and pharmaceutical industries.

• Korean Journal of Plant Resources
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• v.20 no.5
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• pp.461-465
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• 2007

In this study, changes in the overall antioxidant properties and chemical constituents including total phenolics and vitamin C of R. occidentalis fruit during ripening are studied. The antioxidant activity was measured by the free-radical scavenging activity(DPPH method) and reducing power(potassium ferricyanide method). Although, the weight and diameter of R. occidentalis fruit were increased with the progress of ripening, antioxidant activity and total phenolics were decrease during ripening. The highest free-radical scavenging activity(at $125{\mu}g/m{\ell}$) and reducing power(at $100{\mu}g/m{\ell}$) in fruit were 61.67% and 0.71, respectively. Total phenolic content and vitamin C content in fruit of 5 days after fruit set were $220.73{\mu}g/g$ and $540.45{\mu}g/g$, respectively. A linear correlation(r=0.9761) was shown between free-radical scavenging activity and total phenolic content.

• Journal of Life Science
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• v.15 no.5 s.72
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• pp.819-825
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• 2005

The Antioxidative accvities of the cell free extracts containing high glutathione by Saccharomyces cerevisiae FF-8 were tested in vitro experimental models : DPPH method for radical scavenging activity, ferric TBA method and ferric thiocyanate method using linoleic acid and tissue microsome for lipid peroxidation inhibitions. The concentration of intercellular glutathione by cultivating S. cerevisiae FF-8 in the YM optimal medium obtained $204\mug/ml$, which was increased by 2.76-fold from $74\mug/ml$ in the YM basal medium. A comparition between the YM basal medium and the YM optimal medium on antioxidative substance produced by S. cerevisiae FF-8 was investigated. In DPPH ($\alpha, \alpha-diphenyl-\beta-picrylhydrazyl$) method, the electron donating activity of the glutathione produced by S. cerevisiae FF-8 cultured in the YM optimal medium was as high as that of BHT ($ 0.05\%w/v $). The antioxidative a.tivity was measured by inhibition against lipid peroxidation of rat tissues' microsomes. The results of anti-oxidant activity of the cell free extracts by S. rerevisiae FF-8 cultured in the YM optimal medium was shown in the following order . $ liver 60.98\% > kidney 56.43\% > heart 52.91\% > brain 52.13\% > testis 45.57\% > spleen 42.95\% $. In antioxidative activities determined by ferric thiocyanate method and TBA methods against lipid peroxidation, the lipid peroxidation in the control mixture increased more rapidly than the typical peroxidation curve of linoleic acid from one day. The antioxidative activity of the cell free extracts by cultivating S. cerevisine FF-8 in the YM optimal medium were higher than that of the YM basal medium. These data indicate that the cell free extracts containing a high intercellular glutathione of S. cerevisiae FF-8 cultured in YM optimal medium showed strong antioxidative capacities by DPPH radical scavenging activity and ferric thiocyanate and TBARS measurements.

• Korean Journal of Medicinal Crop Science
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• v.8 no.4
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• pp.342-350
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• 2000

This study was carried out to screen antioxidative by in vitro bioassay method from 89 Korean natural sources extracted by 100% MeOH. Antioxidant activity test was used the DPPH method. MeOH extracts from Castanea crenata and Ulmus davidiana var. japonica showed high antioxidant activity by $5.8{\mu}g\;(RC_{50})$ and $12.2{\mu}g\;(RC_{50})$, respectively, among 13 plants exhibiting the activity. The extracts from Platycarya strobilacea, Lindera erythrocarpa, Chrysanthemum boreale, Rumex crispus and Viburnum awabuki also showed over 90% antimicrobial activity, according to in vivo bioassay method.

• Fisheries and Aquatic Sciences
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• v.23 no.3
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• pp.6.1-6.9
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• 2020

Background: Halophyte plant (HPs), a salt-resistant flora, has been reported to provide several health benefits, but the knowledge of its cosmeceutical potential is still ambiguous. Here, 70% ethanol extracts of 22 HPs collected from along the coast of South Korea were investigated for their potentials of antioxidant, anti-aging, and whitening properties for use as materials in novel cosmeceuticals. Methods: Antioxidant activities were determined by DPPH (1,1-diphenyl-2-pricrylhydrazyl) free radical and hydrogen peroxide scavenging assays, and skin aging-related enzyme activities (anti-elastase, anti-collagenase, anti-hyaluronidase, and anti-tyrosinase) were evaluated by using the spectrophotometric method. Results: Among the 22 HPs, we found that Ischaemum antephoroides f. coreana and Atriplex gmelinii extracts presented the strongest scavenging effects against DPPH free radical and hydrogen peroxide, respectively. Our finding additionally suggested that Salicornia europaea extract might provide a major source of anti-elastase and anti-hyaluronidase; meanwhile, Rosa rugosa extract showed the highest anti-collagenase effect. Furthermore, the highest tyrosinase inhibitory activity was possessed by Spartina anglica extract. Conclusion: These findings may suggest that halophyte plants showing biological activities may be potent inhibitors of tyrosinase, elastase, collagenase, and hyaluronidase and could be useful for application in cosmeceuticals.

• The Korean Journal of Food And Nutrition
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• v.25 no.4
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• pp.747-754
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• 2012

The objective of this study was to investigate free amino acid composition, antioxidant activity, alcohol dehydrogenase activity and the sensory quality attributes for the development of functional soy sauce using Hutgae (Hovenia dulcis Thunb) fruit, which is well-known for improving liver function and alleviating various negative physiological effects following heavy consumption of alcoholic beverages. Soy sauces adding six types of extract from Hutgae fruit (HF) were prepared (SSH1: HF 20%, SSH2: HF 10%, SSH3: HF 20%/40 days NaCl extract, SSH4: HF 20%/20 days NaCl extract, SSH5: HF 20% water bath extract, SSH6: freeze-drying powder from HF 20% aqueous extract), compared with soy sauce using the conventional method. These soy sauces were used for determining alcohol dehydrogenase activity by NADH absorbance, the antioxidant effect by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and sensory evaluation by sensory scaling. Total free amino acid contents for most samples were in the range of 327.3 to 375.5 mg%, and then, aspartic acid and glutamic acid content of SSH1 and SSH5 were higher than that of others. DPPH radical scavenging activity was shown to be the highest in SSH4, also SSH1, SSH5 and SSF6 were shown to be higher than the control group. Alcohol dehydrogenase activity was shown to be the highest in SSH5. In sensory evaluation, the highest intensity of roast smell was observed in SSH4 while sweet taste was shown to be the highest in SSH5, and SSH3 and SSH5 revealed higher overall acceptability. From these results, Hutgae fruit soy sauces demonstrated antioxidant activity and alcohol dehydrogenase activity. In conclusion, soy sauces containing the water bath extract of Hutgae fruit may be used as a functional seasoning.

• The Journal of Internal Korean Medicine
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• v.38 no.3
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• pp.367-375
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• 2017

Objective: To investigate the effect of Artemisiae Iwayomogii Herba, Curcumae Radix, and Aurantii Fructus Immaturus complex extract (ACA) on dyslipidemia-related factor expression and anti-oxidation in HepG2 cells. Method: After treatment with ACA in the HepG2 cells, DPPH, ABTS radical scavenging activity, ROS production, and glutathione (GSH) production were measured. The free fatty acid, lipid peroxidation (MDA), ACAT1, and HMG-CoA reductase mRNA expression were measured in the HepG2 cells after treatment with ACA. Results: 1. DPPH, ABTS radical scavenging activity increased in an ACA concentration-dependent manner. 2. ACA significantly decreased ROS production in comparison to the control group. 3. ACA significantly increased glutathione production. 4. ACA significantly decreased free fatty acid and lipid peroxidation (MDA) in the HepG2 cells. 5. ACA decreased the mRNA expression of ACAT1 and HMG-CoA reductase. Conclusion: These results suggest that Artemisiae Iwayomogii Herba, Curcumae Radix, and Aurantii Fructus Immaturus complex extract (ACA) inhibits dyslipidemia-related factor expression and that it is effective in anti-oxidation. A future in vivo experiment with ACA is needed to investigate the effect on anti-dyslipidemia. It is expected that ACA is effective in anti-dyslipidemia and applied to cardiovascular disease, ischemic heart disease, stroke, etc.

• Journal of Korean Medicine Rehabilitation
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• v.30 no.1
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• pp.47-61
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• 2020

Objectives This study is carried out to investigate the effects of Lonicera japonica in wound-induced rats. Methods Rats were divided into 5 groups; normal (Nor), control (Veh), positive comparison (PC), Lonicera japonica 100 mg/kg (LL), Lonicera japonica 200 mg/kg (LH), each n=8. Total polyphenol and flavonoid were quantified. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3 ethylbenzothiazoline-6-sulfonic acid) (ABTS) free radical scavenging activation were measured. Reactive oxygen species (ROS) was measured in serum. Antioxidant factors and inflammatory factors were measured in skin tissue, and also hydroxyproline content. Skin tissue was analyzed by Hematoxylin & Eosin and Masson's trichrome staining method. Results Total polyphenol and flavonoid were 32.86±0.14 mg/g and 67.17±0.57 mg/g. The IC₅₀ values of DPPH and ABTS free radical scavenging activation were 26.69±1.50 ㎍/mL and 49.33±4.52 ㎍/mL. ROS was significantly lower in LL and LH groups. Nuclear factor-erythroid 2-related factor 2 (Nrf2) was significantly higher in LH group and higher in LL group but not significant. Superoxide dismutase 1 (SOD-1), catalase, and heme oxygenase 1 (HO-1) were significantly higher in LL and LH groups. Nuclear factor kappa-B p65 (NF-κBp65), phosphorylated iκBα (p-iκBα), cyclooxygenase 2 (COX-2), and tumor necrosis factor alpha (TNF-α) were significantly lower in LL and LH groups. Hydroxyproline was significantly higher in LL and LH groups. The histopathologic analysis showed that skin tissue had recovered further more in LL and LH groups than in Veh group. Conclusions These results suggest that Lonicera japonica has the anti-oxidant, anti-inflammatory and healing effects in wound-induced rats.

• The Journal of Korean Medicine
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• v.38 no.3
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• pp.43-58
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• 2017

Objectives: We performed this study to evaluate the antioxidative and hypolipidemic effect of Artemisia iwayomogi (韓茵蔯), Curcuma longa L. (鬱金) and Raphanus sativus L. (蘿?子) (ACR). Method: We enriched Artemisiae Capillaris, Curcumae Longae and Raphani Semen compound with alcohol. ACR extract is treated to HepG2 cell. Cell groups are devided into 3 groups: normal, control and ACR treated group. We measured polyphenol, flavonoids, DPPH and ABTS radical scavenging activity, ROS, glutathione, GSH peroxidase, GSH reductase, SOD, catalase, free fatty acid, lipid peroxidation and suppression of ACAT1 and HMG-CoA reductase expression on mRNA level. Results: 1. ACR contained polyphenol and flavonoids and increased GSH significantly in HepG2 cell. 2. ACR increased GPx, GR, and catalase activity significantly in HepG2 cell. 3. ACR increased DPPH and ABTS radical scavenging activity significantly in HepG2 cell and decreased ROS. 4. ACR decreased free fatty acid and MDA significantly in HepG2 cell. 5. ACR suppressed ACAT1 and HMG-CoA reductase expression on mRNA level in HepG2 cell. Conclusion: This study suggests that ACR has antioxidative and hypolipidemic effect and might be effective in prevention and treatment of dyslipidemia.