Journal of the Korean Society of Food Science and Nutrition
/
v.41
no.4
/
pp.437-442
/
2012
Red yeast rice (RER) has been used in China for centuries for its medicinal properties and is an increasingly popular alternative lipid-lowering treatment. This study was carried out to estimate the antioxidant properties of RER extracts. The ethyl acetate extract exhibited the DPPH radical scavenging activity of 85% at 0.2 mg/mL and $IC_{50}$ 0.13 mg/mL. A significant proportion of hydroxyl radicals in a cuvette were scavenged: 44.2% at 2.5 ${\mu}g$/mL, 74.1% at 5.0 ${\mu}g$/mL, and >100% at 10 ${\mu}g$/mL. The $HepG_2$ cells pre-treated with RER ethyl acetate extract reduced the hydroxyl radicals significantly compared to the control cells. Oxidative DNA damage was measured using a Comet assay. The RER ethyl acetate extract did not induce any DNA damage per se, and appeared to enhance the resistance to DNA damage caused by an oxidant challenge with $H_2O_2$, whereas lovastatin increased the level of DNA damage in the cells in both the unstressed (no oxidant) and those stressed with $H_2O_2$. The relative gene expression of the antioxidant enzymes in $HepG_2$ cells were also affected by the RER ethyl acetate extract. The $HepG_2$ cells were pre-incubated with the RER ethyl acetate extract, and then stressed with $H_2O_2$ or left unstressed (no oxidant). In the unstressed cells, superoxide dismutase (Cu/Zn SOD) and glutathione peroxidase (GPx) were increased significantly 3.25-fold and 2.67-fold, respectively, whereas in the stressed cells, the catalase (CAT) level was increased by 4.64-fold and 7.0-fold at 5 ${\mu}g$/mL and 10 ${\mu}g$/mL, respectively, compared to those of the control. From these results, RER appears to be effective in suppressing oxidative stress.
Fermentation of ice apple wine from freeze-concentrated Fuji apple juice to 36 $^{\circ}Brix$ was carried out using Saccharomyces cerevisiae SS89, a sugar-tolerant wine yeast strain. The characteristics of the fermentation and the properties of ice apple wine were compared with those of S. cerevisiae W-3, an industrial wine yeast that was used as a control in this study. During the fermentation, the alcohol content increased more rapidly by S. cerevisiae SS89 together with the decrease of the soluble solid content, compared to S. cerevisiae W-3. It reached 12% (v/v) after 15 days of fermentation by S. cerevisiae SS89 (12.4%, v/v) and 21 days by S. cerevisiae W-3 (12.6%, v/v). The soluble solid contents of the SS89 and W-3 wines were 24.0 and 23.6 $^{\circ}Brix$, respectively. Lactic acid was detected at the highest level, followed by malic aid, among the organic acids in both wines. No big differences in the organic acid contents were observed based on the strains. In the SS89 wine, higher levels of methanol, propanol, butanol, and isoamyl alcohol were detected, together with a lower isobutanol content, compared with the W-3 wine. The SS89 wine showed higher level of intensity as well as higher Hunter's L and b color values compared to the W-3 wine. In the sensory evaluation, similar scores in color, flavor, taste, and overall preference were obtained in the two wines. Therefore, S. cerevisiae SS89 was thought to be useful for the rapid fermentation of ice apple wine.
The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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v.20
no.1
s.32
/
pp.80-98
/
2007
Objectives : This study was carried out to evaluate anti-oxydative, anti-tumor effect for clinical application of Whakijogyungtang (WJT) Results : 1. DPPH radical scavenging activities of WJT water extracts(Exts) were in proportion as concentration of WJT.(3 ${\mu}g/ml:12.6{\pm}2.3$ %) 2. ABTS+ scavenging activities of WJT water Exts were more effective in high density.(3 ${\mu}g/ml:4.3{\pm}1.6$ %, 10 ${\mu}g/ml$: $11.8{\pm}2.5$ %, 30 ${\mu}g/ml:45.3{\pm}3.2%$ 100 ${\mu}g/ml$: $62.7{\pm}4.8%$) 3. Hydrogen peroxide$(H_2O_2)$ scavenging activities of WJT water Exts were effective.(3 ${\mu}g/ml:4.7{\pm}0.8$ %, 10 ${\mu}g/ml: $8.2{\pm}1.6$ %, 30 ${\mu}g/ml:19.5{\pm}3.2$ % 100 ${\mu}g/ml$: $24.6{\pm}3.8$ %) 4. Anti oxidative effects against linoleic acid were not effective. 5. The generation of $O_2\;^-$ in S-180 cells were according to the concentration of WJT water Exts, specially effective over 100 ${\mu}g/ml$ concentration. 6. The SOD activities in S-180 cells were in proportion as cytotoxicity against S-180 cells of WJT water Exts. 7. The GPx activities in S-180 cells were in proportion as cytotoxicity against S-180 cells of WJT water Exts(more effective on 300 ${\mu}g/ml$ and 1000 ${\mu}g/ml$ concentration), but the catalase activities in S-180 cells were not effective. 8. The results of activites against multi-drug-resistance(MDR) of WJT were as follows. 1) In water Exts from WJT, cytotoxicity against AML-2/D100 with vincristine($IC_{50:}39.78$${\mu}g/ml$) was more effective than without vincristine($IC_{50:}$ 183.58 ${\mu}g/ml$), Cross resistance(CR:3.85) was not effective, and anti-MDR activites(RF) was effective.(RF:3.85) 2) In hexane fraction, cytotoxicity against AML-2/D100 with vincristine ($IC_{50:}130.88$${\mu}g/ml$) was more effective than without vincristine ($IC_{50:}293.10$${\mu}g/ml$) and anti-MDR activites(RF) was effective.(RF:4.61) 3) In chloroform fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. 4) In ethyl acetate fraction, cytotoxicity against AML-2/D100 with vincristine($IC_{50:}36.43$${\mu}g/ml$) was more effective than without vincristine ($IC_{50:}73.07$${\mu}g/ml$), Cross resistance(CR:0.53) was not effective, and anti-MDR activites(RF) was effective.(RF:2) 5) In butanol fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. 6) In $H_2O$ fraction, the cytotoxicity against AML-2/WT and AML-2/D100 was not effective. Conclusion : These result suggest that WJT has antioxidative effects, anti-tumor effects by apoptosis of free radical$(O_2\;^-)$ activity, and anti-MDR activites(especially hexane and ethyl acetate fraction).
In this study, total antioxidant properties of extracts from different parts of Lespedeza bicolor were determined using techniques of measuring 1,1-diphenyl-2-picryl hydrazyl/2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)-radical scavenging activity and total phenolic contents. The total antioxidant activities of leaf, stem and root extracts from various solvents (water, 50, 70, 100% ethanol, and hot-water) indicated that 50 and 70% ethanol extracts have high radical scavenging activities and phenolic contents. A systematic approach was used to determine the total antioxidant activity of different solvent fractions of the Lespedeza bicolor extracts, partitioning with chloroform, ethyl acetate, n-butanol, and water, and the ethyl acetate fraction was found to have the strongest antioxidant activity. Antioxidant assay-guided isolation was carried out to isolate potential antioxidant compounds. The ethyl acetate fraction of the leaf extract was subjected to silica gel, LH-20 and RP-18 column chromatography successively, and afforded compound 1, which was identified as eriodictyol by NMR and MS analysis, after which its antioxidant activity was determined.
This study was performed to investigate the effect of ethanol extract of Pimpinella brachycarpa(PBE) on chronically ethanol-induced hepatotoxicity in rat liver. Sprague-Dawley rats weighing 90-130 g were divided into 5 groups; normal group(NOR), ethanol(35%, 10 ml/kg) treated group(CON), PBE 200 mg/kg treated group(P1), PBE 200 mg/kg and ethanol treated group(P2), and PBE 400 mg/kg and ethanol treated group(P3). PBE was also fractionated by the following solvent: n-hexane, chloroform, ethylacetate and n-butanol. The antioxidative capacity of the n-hexane fraction was the highest among fractions and was similar to that of butylated hydroxytoluene(BHT). The body weight gain and feed intake of the rats were decreased by ethanol administration, but were gradually increased to the similar levels of the NOR group by administering PBE. The AST activity in serum elevated by ethanol was significantly decreased by administering the high dosage of PBE, but exerted no significant change on serum ALT activity. It was also observed that the hepatic activities of xanthine oxide(XO), catalase and glutathione peroxidase(GSH-Px) increased by ethanol were markedly decreased in the combined ethanol and PBE administered groups(P2 and P3), but not in the activity of superoxide dismutase(SOD) as compared with the CON group. The glutathione(GSH) contents were decreased by ethanol adminstration, however, increased after administering PBE. These results suggest that ethanol extract of Pimpinella brachycarpa has a possible positive effect on the liver function in hepatotoxicity-induced rats by ethanol administration.
Liriope platyphylla has been used in oriental medicine as an effective medical plant to improve symptoms of cough, sputum production, neurodegenerative disorders, obesity and diabetes for long time. In order to investigate the effects of novel extracts on nerve growth factors (NGF)-stimulated neuritic outgrowth, the alteration of NGF expression and NGF receptor signaling pathway were detected in neuroblastoma cells and C57BL/6 mice. Of a total of 13 novel extracts, 4 extracts (LP-E, LP-M, LP-M50, LP2E17PJ) showed high viability on MTT assay. Also, all of these extracts induced NGF secretion and NGF mRNA expression in neuroblastoma cells. However, the NGF-induced neuritic outgrowth from PC12 cells was only stimulated by LP-E, LP-M and LP-M50. Furthermore, we selected LP-M as a best candidate, based on method and amounts of extraction, in order to verify its effect in mice. C57BL/6 mice were treated with 50 mg/kg of LP-M for 2 weeks and the effects on NGF regulation were analyzed with various methods. The expression of NGF mRNA was significantly increased in LP-M treated mice compared to vehicle treated mice. Also, the signaling pathway of p75NTR was inhibited in the cortex by LP-M treatment, with no change in the hippocampus of brain. However, the signaling pathway of TrkA was dramatically activated in only hippocampus via LP-M treatment. Therefore, these results suggest that the novel four extracts of L. platyphylla may contribute to the regulation of NGF expression and secretion in neuronal cells. LP-M was especially considered to be an excellent candidate for a neurodegenerative disease-therapeutic drug.
This study was carried out to investigate the genotoxicity in comet and in vitro micronucleus assay and mutagenicity in Ames test of the extracts from leaves and stem of Morus alba L. The samples showed a very weak cytotoxicity on the NIH/3T3 cells by SRB assay. The cell viability of the extracts and fractions from leaves and stems of Morus alba L. was 80% over at $500\;{\mu}g/ml$, and that of the chloroform fractions from leaves and stems showed lower than others. The genotoxicity at $250\;{\mu}g/ml$ of 100% EtOH and water extracts on the NIH/3T3 cells in comet assay was about 40% compared to positive control, and most fractions from 100% EtOH extract of the leaves showed stronger genotoxicity than that offractions from the stem. The genotoxicity with S-9 mix in vitro micronucleus assay of the 100% EtOH and water extracts form Morus alba L. did not indicate any significant difference as compared with control group. The cytokinesis-binucleated cells were showed in the hexan, chloroform, ethylacetate and butanol fractions from the extract of the leaves without S-9, and sample with S-9 showed CB cells in the chloroform fraction from the leaves. In the Ames test, the water and 100% ethanol extracts of Morus alba L. did not have a strong mutagenicity in TA98 and TA100, but the fractions of organic solvents of the ethanol extract had $10{\sim}26%$ of mutagenicity on the TA100 strain.
Kim, Nan-Young;Kim, Young-Kuk;Bae, Ki-Ja;Choi, Jae-Ho;Moon, Jea-Hak;Park, Geun-Hyung;Oh, Deog-Hwan
Journal of the Korean Society of Food Science and Nutrition
/
v.34
no.6
/
pp.755-758
/
2005
Wild grape is a traditional medicine plant in north-eastern part of Asia and has been known to have healing properties for various illnesses. This study was to determine the optimum extraction condition and antioxidant activity of ethanol extracts of wild grape (V. coignetiae) seed. Also, organic solvent fractions of hexane, chloroform, ethyl acetate and butanol were obtained from the ethanol extract of wild grape seed at different temperatures. Total ethanol extraction yield of wild grape seed ranged from $4\%\;to\;12\%$ depending on the ethanol concentration, extraction temperature and time condition. The highest extraction yield of $11.9\%$ was obtained at $90\%$ ethanol condition for 12 hour at $70^{\circ}C$. However, the strongest free radical scavenging effect $(RC_{50})$ with $20.93\mu g/mL$ was observed in $70\%$ ethanol extract of wild grape seed extracted for 6 hour at $70^{\circ}C,\;while\;RC_{50}\;with\;40.42$\mu g/mL$ was observed in $90\%$ ethanol extract for 12 hour at $70^{\circ}C$. Antioxidant activity of ethanol extracts of wild grape seed increased as total phenol contents increased. Among each fraction obtained from organic solvents, ethyl acetate fraction was found to have the strongest $RC_{50}\;(8.6\mu g/mL)$ and 636.77 mg GAE/g phenol contents .
Journal of the Korean Society of Food Science and Nutrition
/
v.38
no.4
/
pp.502-508
/
2009
Antimicrobial activity of Sargassum thunbergii was determined by paper disc assay and minimum concentration inhibitor (MIC) test. A water extract of S. thunbergii did not show the antimicrobial activity, but an ethanol extract of S. thunbergii (SHE) inhibited Serratia liquefaciens, Salmonella Typhimurium, Pseudomonas aerogenosa and all of the tested gram-positive bacteria at 4 mg/mL. Especially, Bacillus subtilis, Clostridium perfringens and Listeria monocytogenes were susceptible to SHE. As the results of MIC test, SHE inhibited the growth of B. subtilis, Staphylococcus aureus and Listeria monocytogenes at concentration of $0.1{\sim}0.3%$, and inhibited C. perfringens at 0.01%. In the thermal and pH stability test for SHE, antibacterial activities of SHE were maintained when the SHE was treated at $121^{\circ}C$ for 15 minutes or under pH $2{\sim}8$. SHE was partitioned in the order of n-hexane, chloroform, ethyl acetate and butanol. As the results of the MIC test for each obtained fraction, no fraction exhibited higher antibacterial activity than that of the crude SHE. However, a mixture of chloroform, ethylacetate and ethanol fractions showed higher antibacterial activity than SHE.
Kim, Won Baek;Park, So Hae;Hwang, Hye Sun;Woo, Jung Yoon;Lee, Hye Ryun;Hwang, Dae Youn;Choi, Ji Hye;Lee, Heeseob
Journal of the Korean Society of Food Science and Nutrition
/
v.41
no.10
/
pp.1363-1370
/
2012
In this study, methanol extract and its organic solvent fractions were prepared from Prunus davidiana (Carriere) Franch. fruit. Antioxidative activities, polyphenolic and flavonoid contents, and tyrosinase inhibitory activities were evaluated. Among the fractions, ethyl acetate fraction showed the highest antioxidative activity with $IC_{50}$ values of 5.8 ${\mu}g/mL$ and 88.1 ${\mu}g/mL$ for DPPH radical and nitrite scavenging, respectively, which were comparable to those of ascorbic acid. Further, total flavonoid and polyphenolic contents were highest in the ethyl acetate fraction with $IC_{50}$ values of 244.5 mg/g and 210.2 mg/g, respectively. $IC_{50}$ values for tyrosinase inhibitory activity were 0.310 mg/mL and 0.329 mg/mL for the ethyl acetate and n-butanol fractions, respectively. Based on these results, it is suggested that the ethyl acetate fraction of Prunus davidiana (Carriere) Franch. fruit could be used as a functional material in the food and pharmaceutical industries.
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