Objectives : To evaluate the radical scavenging and acetylcholinesterase (AChE) inhibitory activities of the ethylacetate (EtOAc)-soluble portion of a methanolic extract of Aster yomena, three different assay systems were performed. Methods : The antioxidant activity of A. yomena extract was tested as its capacity to scavenging free radicals of DPPH and $ABTS^+$, which has been widely used to evaluate the antioxidant activity of natural products from plant sources. AChE inhibitory activity was tested against mouse brain AChE by spectrophotometric method of Ellman using ELISA microplate reader. Results : The methanolic extract of A. yomena was fractionated and the EtOAc-soluble portion showed significant AChE inhibitory and free radical scavenging effects. Also the EtOAc-soluble portion revealed the highest phenolic contents as compared to the other extracts. Conclusions : These results indicate that phenolic compounds may be important constituents that give rise to the anti-AChE and antioxidative activities of A. yomena extract. Further phytochemical studies on this plant, for nutraceutical or pharmaceutical application, are warranted.
In this study, we found that the moisture content of black sesame seeds increased in proportion to steaming time, and it decreased in reverse proportion to the roasting temperature and time. The crude fat and crude ash contents were shown to be in the order of steamed black sesame>raw black sesame and roasted black sesame>raw black sesame, Crude protein decreased in reverse proportion to the steaming time, and more crude protein was found in the raw black sesame samples than in the roasted black sesame samples. The contents of sesamin, sesamolin, and total lignans were shown to be in the order of roasted black sesame>raw black sesame>steamed black sesame. In the steamed black sesame samples, sesamin showed its highest level with 20 minutes of treatment, and sesamolin showed its highest level with 15 minutes of treatment. In the roasted black sesame samples, sesamin, sesamolin, and total lignans showed their highest levels with 15 minutes of treatment at $100^{\circ}C$. The phenolic compound content increased in proportion to steaming time in the steamed samples, and reached a peak after 15 minutes of treatment at $100^{\circ}C$, and then decreased after 20 minutes. SOD-like activity reached a peak after 15 minutes of treatment, and in the roasted sample it reached a peak after 15 minutes of treatment, and then decreased after 20 minutes. SOD-like activity was comparatively lower than tocopherol and higher than sesamol. The intensity of electron donating ability, following 30 minute treatments, was shown to be highest in the steamed black sesame samples after 25 minutes of treatment, and next highest in the roasted black sesame samples after 15 minutes at $100^{\circ}C$. The electron donating ability was comparatively lower than tocopherol and sesamol. With regard to lecithin's antioxidant effects, the steamed samples showed a higher oxidation restriction rate in proportion to time, and the roasted samples showed the highest rate after 15 minutes of treatment, and then decreased after 20 minutes of treatment. for hydroxyl radical scavenging, similar scavenging activity to tocopherol, and comparatively higher scavenging activity than sesamol, was shown in all samples: all samples showed scavenging abilities of 90% or higher. In summary, this study applied three different treatment methods to black sesame to determine the optimum treatment conditions, and also examined the antioxidant effects and functional characteristics. The results showed that roasting can be used for other purposes than producing oil, and also suggested that methods other than roasting can be used in a variety of ways in cooking. Also, the different treatment methods can be applied in cooking in a variety of ways, to enhance functionality and preference.
Objectives : Gastrodiae Rhizoma extract (GE) is possess the various bioactive compounds such as gastrodin, vanilyl alcool and p-hydroxybenzyl alcohol. Various processing methods such as steaming have been widely applied to ease ingestion and enhance the therapeutic effects of plant materials including GE in East-Asia area. The aim of this study was to evaluate the dermal bioactive properties of GE. Methods : First, total phenol, total flavonoid, gastrodin and ergothionein contents of GE were measured. In order to evaluate the dermal bioactive properties of steamed GE compared with not-steamed GE, tyrosinase, collagenase and elastase inhibitory activity were tested. Furthermore, the anti-oxidant activity of GE assessed based on DPPH and ABTS radical scavenging assay. Results : In results, total phenol and total flavonoid contents were increased when 9 times steamed compared to not-steamed GE. Also, GE increased gastrodin contents, in proportion to the number of steaming times and ergothioneine content was abolished in the steaming state. The DPPH radical scavenging activity of GE increased by steaming, but the ABTS radical scavenging activity was not related to the steaming process. In addition, the tyrosinase inhibitory activity was increased as the number of steaming times of GE increased. Collagenase was most inhibited by 4 times steamed GE, and elastase was inhibited by 8 times steamed GE. Conclusion : In conclusion, these results suggest that steamed GE extract has the potential as a cosmetic material which possess anti-oxidant and whitening activities than not steamed GE.
Objectives: This study was designed to experiment with the antioxidant and anti-inflammatory effects of Taraxacum platycarpum H. Dahlstedt, Lonicera japonica Thunberg, and Leonurus japonicus Houtt. complex (TLL) in LPS-induced RAW264.7 cell. Methods: The antioxidant activity of TLL was measured by FRAP assay, DPPH radical scavenging activity, ABTS radical scavenging activity. Total polyphenol and flavonoid contents of TLL were measured by using standard methods. The anti-inflammatory effects of TLL were measured by NO production, biomarker production (PGE2, IL-1β, IL-6, TNF-α), mRNA expression level (iNOS, COX-2, IL-1β, IL-6, TNF-α) and protein expression level (ERK, JNK, p38). Results: Total polyphenol and flavonoid contents in TLL were 58.03±1.02 mg of Gallic acid equivalents (GAE)/g and 16.58±0.60 mg of Quercetin equivalents (QE)/g respectively. In FRAP assay, DPPH and ABTS radical scavenging activity, a concentration-dependent increase in TLL was observed. To explore antioxidant and anti-inflammatory effects of TLL, RAW 264.7 cells were treated with TLL and LPS for 24 hours. Cell viability of RAW 264.7 cells were measured by adding EZ-Cytox, It was remarkably increased at 50, 100, 200 ㎍/㎖ concentrations of TLL. NO, ROS, iNOS, IL-1β, IL-6, TNF-α, ERK, JNK and p38 were remarkably decreased at 50, 100, 200 ㎍/㎖ concentrations of TLL compared to the control group. PGE2 and COX-2 were remarkably decreased at 100, 200 ㎍/㎖ concentrations Conclusion: These results suggest that TLL complex has antioxidant and anti-inflammatory effects.
Objectives : In this study, the antioxidant activities of the 80% ethanol and hot water extracts of Euphorbia supina Rafinesque were investigated. Methods : We measured total phenol contents, flavonoid contents, 2,2-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay, 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging assay. The production of reactive oxygen species was measured in LPS-induced RAW 264.7 cells using flow cytometry system. Results : The content of phenol in the hot water extract was $65.529{\pm}0.462mg/g$ and $126.932{\pm}1.894mg/g$ in the 80% ethanol extract, and that of flavonoid in the hot water extract was $16.063{\pm}0.471mg/g$ and $29.159{\pm}1.963mg/g$ in the ethanol extract. The 80% ethanol extract also showed higher DPPH and ABTS radical scavenging activities ($90.8{\pm}1.0%$ and $92.5{\pm}0.7%$) than the hot water extract ($81.5{\pm}0.5%$ and $91.5{\pm}0.2%$). The production of reactive oxygen species(ROS) was reduced dose-dependently by 80% ethanol and hot water extract at concentration of 1, 10 and $100{\mu}g/m{\ell}$ of RAW 264.7 cells. Conclusion : According to these results, the 80% ethanol extract of Euphorbia supina Rafinesque has a good anti-oxidative effects than the hot water extract. Thus, the 80% ethanol extract of Euphorbia supina Rafinesque may serve as useful natural antioxidants.
Objective: To evaluate the effects of L-lysine (Lys)/L-arginine (Arg) on lipid and protein oxidation of emulsion sausage during storage and its possible mechanism. Methods: Four samples were prepared based on the presence or absence of additional sodium isoascorbate, Lys, or Arg: sample A (control), sample B (0.05 g of sodium isoascorbate), sample C (0.4 g of Lys), and sample D (0.4 g of Arg). Peroxide value (POV), thiobarbituric reactive substances (TBARS), protein carbonyls and thiols were measured. 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radical-scavenging, ferrous ion-chelating ability were also measured. Results: Compared with the control, the sample treated with sodium isoascorbate, Lys or Arg had significantly lower POV during the initial 20 days, TBARS during the initial 15 days. Protein carbonyls were significantly lower compared Sample B, C, and D with A during the later storage (10 to 25 days); basically, protein thiols became lower during storage when the samples were treated with sodium isoascorbate, Lys, or Arg. Both Lys and Arg had weak reducing power but strong ferrous ion-chelating activity and DPPH radical- and hydroxyl radical-scavenging activity. Conclusion: Both Lys and Arg effectively inhibited the oxidation of lipids and proteins in emulsion sausage by scavenging free radicals and chelating ferrous ions. The results obtained may be favorable for the prevention of lipid and protein oxidation during processing and storage of meat products.
Objectives : This study was conducted to compare antibacterial activities and free radical scavenging activity between the Bee Venom and Sweet Bee Venom in which the allergy-causing enzyme is removed. Methods : To evaluate antibacterial activities of the test samples, gram negative E. coli and gram positive St. aureus were compared using the paper disc method. For comparison of the antioxidant effects, DPPH(1,1-diphenyl-2picrylhydrazyl) free radical scavenging assay and Thiobarbituric Acid Reactive Substances(TBARS) assay were conducted. Results : 1. Antibacterial activity against gram negative E. coli was greater in the Sweet Bee Venom group than the Bee Venom group. 2. Antibacterial activity against gram positive St. aureus was similar between the Bee Venom and Sweet Bee Venom groups. 3. DPPH free radical scavenging activity of the Bee Venom group showed 2.8 times stronger than that of the Sweet Bee Venom group. 4. Inhibition of lipid peroxidation of the Bee Venom group showed 782 times greater than that of the Sweet Bee Venom group. Conclusions : The Bee Venom group showed outstanding antibacterial activity against gram positive St. aureus, and allergen-removed Sweet Bee Venom group showed outstanding antibacterial activity against both gram negative E. coli and gram positive St. aureus. For antioxidant effects, the Bee Venom was superior over the Sweet Bee Venom and the superiority was far more apparent for lipid peroxidation.
Objective: The objective of this study was to compare the antioxidant effects among wild ginseng, cultivated wild ginseng, and ginseng extracts. Methods: In vitro antioxidant activities were examined by total antioxidant capacity (TAC), oxygen radical scavenging capacity(ORAC), total phenolic content, 1, 1-Diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, inhibition of induced lipid peroxidation using liver mitochondria, reactive oxygen species(ROS) scavenging effect using 2', 7'-dichlorofluorescein(DCF) fluorescence. Results: 1. TAC of 1.5 and 3.75 mg extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 2. ORAC of 2, 10, and $20{\mu}g$ extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 3. Total phenolic content of 0.375, 0.938, and 1.875 mg extracts was highest in cultivated wild ginseng, followed by wild ginseng and lowest in ginseng. 4. DPPH(1, 1 -Diphenyl-2-picrylhydrazyl) scavenging activity between wild ginseng and cultivated wild ginseng did not differ significantly (p>0.05). 5. Induced lipid peroxidation, measured by TBARS concentration in solution containing rat liver mitochondria incubated in the presence of $FeSO_4$/ascorbic acid was inhibited as amounts of wild ginseng, cultivated wild ginseng, and ginseng extracts increased. TBARS concentration of ginseng extracts were significantly (p<0.05) higher than wild ginseng or cultivated wild ginseng extracts. 6. DCF fluorescence intensity was decreased as concentrations of wild ginseng, cultivated wild ginseng, and ginseng extracts increased, demonstrating that ROS generation was inhibited in a concentrationdependent manner. Conclusions: In summary, the results of this study demonstrate that cultivated wild ginseng extracts had similar antioxidant activities to wild ginseng extracts and greater that of cultivated ginseng extracts.
Objectives : Peroxynitrite($ONOO^-$), superoxide anion(${\cdot}{O_2}^-$) and nitric oxide (NO) is a cytotoxic species that can oxidize several cellular components such as proteins, lipids and DNA. It has been implicated in the aging process and age-related disease such as Alzheimer's disease, rheumatoid arthritis, cancer and atherosclerosis. The aim of this study was to investigate scavenging activities for $ONOO^-$ and its precursors, NO and ${\cdot}{O_2}^-$ of Vespae Nidus. Methods : Dichlorodihydrofluorescein diacetate (DCFDA), 4,5-diaminofluorescein (DAF-2) and dihydrorhodamine 123 (DHR 123) were used to investigate scavenging activities of $ONOO^-,\;NO,\;{\cdot}{O_2}^-$. Six-months-old ICR mice were used. After mice were injected with lipopolysaccharides(LPS), kidney organization was evaluated. Three comparison groups of ICR mice were used : a normal group, an experimental group that was fed Vespae Nidus extract and then injected with LPS, and a control group that was injected with LPS. Scavenging activities of $ONOO^-,\;NO,\;{\cdot}{O_2}^-$ in these groups were measured in the same way. Results : Vespae Nidus markedly scavenged authentic $ONOO^-,\;{\cdot}{O_2}^-$ and NO. It also inhibited $ONOO^-$ induced by ${\cdot}{O_2}^-$ and NO which are derived trom SIN-1. Furthermore, it inhibited $ONOO^-,\;{\cdot}{O_2}^-$, and NO generation by Vespae Nidus in LPS-treated ICR mouse kidney postmitochondria. Conclusions : These results suggest that Vespae Nidus might be developed as an effective $ONOO^-,\;{\cdot}{O_2}^-$, and NO scavenger for the prevention of the aging process and age-related diseases.
Kwak, Chung Shil;Son, Dahee;Chung, Young-Shin;Kwon, Young Hye
Nutrition Research and Practice
/
제9권6호
/
pp.569-578
/
2015
BACKGROUND/OBJECTIVES: Fermentation can increase functional compounds in fermented soybean products, thereby improving antioxidant and/or anti-inflammatory activities. We investigated the changes in the contents of phenolics and isoflavones, antioxidant activity and anti-inflammatory activity of Doenjang during fermentation and aging. MATERIALS/METHODS: Doenjang was made by inoculating Aspergillus oryzae and Bacillus licheniformis in soybeans, fermenting and aging for 1, 3, 6, 8, and 12 months (D1, D3, D6, D8, and D12). Doenjang was extracted using ethanol, and sequentially fractioned by hexane, dichloromethane (DM), ethylacetate (EA), n-butanol, and water. The contents of total phenolics, flavonoids and isoflavones, 2,2-diphenyl-1 picryl hydrazyl (DPPH) radical scavenging activity, and ferric reducing antioxidant power (FRAP) were measured. Anti-inflammatory effects in terms of nitric oxide (NO), prostaglandin (PG) E2 and pro-inflammatory cytokine production and inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 expressions were also measured using LPS-treated RAW 264.7 macrophages. RESULTS: Total phenolic and flavonoid contents showed a gradual increase during fermentation and 6 months of aging and were sustained thereafter. DPPH radical scavenging activity and FRAP were increased by fermentation. FRAP was further increased by aging, but DPPH radical scavenging activity was not. Total isoflavone and glycoside contents decreased during fermentation and the aging process, while aglycone content and its proportion increased up to 3 or 6 months of aging and then showed a slow decrease. DM and EA fractions of Doenjang showed much higher total phenolic and flavonoid contents, and DPPH radical scavenging activity than the others. At $100{\mu}g/mL$, DM and EA fractions of D12 showed strongly suppressed NO production to 55.6% and 52.5% of control, respectively, and PGE2 production to 25.0% and 28.3% of control with inhibition of iNOS or COX-2 protein expression in macrophages. CONCLUSIONS: Twelve month-aged Doenjang has potent antioxidant and anti-inflammatory activities with high levels of phenolics and isoflavone aglycones, and can be used as a beneficial food for human health.
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