BACKGROUND/OBJECTIVES: Isoflavones are widely believed to be beneficial to human health, in relation to their antioxidant potentials. Exercise can cause an imbalance between reactive oxygen species (ROS) and antioxidants. This study was conducted in order to investigate the ability of isoflavones in amelioration of oxidative stress induced by exercise. MATERIALS/METHODS: Male Sprague-Dawley rats were assigned to one of four groups: isoflavone-free with no exercise (CON-sd), isoflavone-free with exercise (CON-ex), isoflavone-supplemented with no exercise (ISF-sd), and isoflavone-supplemented with exercise (ISF-ex). Animals exercised on the treadmill for 30 minutes per day, five days per week. TBARS as a marker of oxidative stress and antioxidant enzyme activity, including SOD, GSH-px, and catalase were determined in liver tissue. Serum lipid profile was also examined. RESULTS: A significant effect of isoflavone alone was observed on abdominal fat pad mass. ISF-ex had significantly less abdominal fat pad than CON-ex. Both exercise and isoflavone treatment had significant effects on lowering plasma triglyceride (TG), thus, the ISF-ex group had a significantly lower TG level than the CON-sd group, by 30.9%. However, no differences were observed in plasma cholesterol, HDL-C, and cholesterol/HDL-C ratio. Exercise, isoflavone, and exercise-isoflavone interaction effects were significant on thiobarbituric acid reactive substances (TBARS) (P = 0.001, 0.002, and 0.005, respectively). The CON-ex group showed a higher TBARS level than the other three groups. By contrast, in the ISF-ex group, TBARS was restored to the level of the ISF-sd or CON-sd group. Isoflavone had a significant effect on superoxide dismutase (SOD) (P = 0.022) and catalase activities (P = 0.049). Significantly higher SOD and catalase activities were observed in ISF-ex than CON-ex. SOD and catalase activities showed an inverse pattern of TBARS. Taken together, isoflavones increased the activities of SOD and catalase with concomitant decreases in TBARS, indicative of decreased oxidative stress. CONCLUSIONS: Isoflavone supplementation enhances antioxidant action with attenuation of exercise-induced oxidative stress, as measured by decreases in TBARS, and inhibits body fat accumulation and plasma TG increase. Antioxidative effects ascribed to isoflavones may be partially exerted via enhancement of antioxidant enzyme activities.
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.11
/
pp.1731-1736
/
2014
The quality characteristics, enzyme activity, and antioxidative activity of fermented wild grass juices were investigated during fermentation and ripening for 6 months. Fermented wild grass juice was prepared from wild grasses (Oenothera biennis, Portulaca oleracea, and Rhus verniciflua) and sugar. Wild grasses and sugar mixed at the same ratio (1:1, w/w) and ripened at $20^{\circ}C$ for 3 months after fermentation for 3 months at $20^{\circ}C$. The $^{\circ}Bx$ of all fermented wild grass juices (FWGJ) decreased during fermentation. The pH of all FWGJ decreased gradually during fermentation and did not show any significant difference during ripening. Viscosity of FWGJ increased during fermentation but decreased during ripening periods in all tested samples. Total viable cell of FWGJ decreased after fermentation for 1 month, whereas lactic acid bacteria were not detected during fermentation. Enzyme activity was lower than 1 unit during fermentation and ripening period in all tested FWGJ samples. Enzyme activity of commercial FWGJ (Acanthopanax sessiliflorum, Oenanthe javanica, Plantago asiatica L., Platycodon grandiflorum, Orostachys japonicus A.) showed lower activity of 1 unit following invertase, cellulase, and amylase activity.
Journal of the Korean Society of Food Science and Nutrition
/
v.42
no.1
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pp.40-45
/
2013
This study was designed to examine the effect of sea buckthorn (SBT) leaves on hepatic antioxidative enzyme levels in diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats by an injection of streptozotocin (STZ). Sprague-Dawley rats were then fed for four weeks, with experimental groups receiving a modified diet containing 10% or 20% powder derived from SBT leaves. The experimental groups were divided into six groups: a normal (N)-control group, N-SBT 10% and N-SBT 20% treated groups, STZ-control, STZ-SBT 10% and STZ-SBT 20% treated groups. Malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR), glutathione-S-transferase (GST) and xanthine oxidase (XOD) levels were measured in liver cytosol. The results showed that the level of SOD was significantly increased in the N-SBT 20% group but not statistically different in the diabetic group. The level of CAT was significantly higher in the N-SBT 20% group compared to the control group. The level of GPX was significantly increased in the N-SBT 20% group and the diabetic supplementary group. In contrast, the level of XOD was significantly decreased in the diabetic group supplemented with SBT leaves.
This study was performed to examine the increasing biological activities of both nerve growth factor induction and anti-aging activity of gastrodia (Gastrodia elata) with fermentation process. Antioxidant activities, taken in the fermenting, were investigated to verify utility value of gastrodia for functional food and cosmetics. Fermented gastrodia extracts showed higher antioxidant activities than dried gastrodia extracts. During the routine check of all the practical use potential as functional food, inhibition effect of angiotensin converting enzyme (ACE) and xanthine oxidase (XOase) was tested among water extracted dried gastrodia (WEDG), water extracted fermented gastrodia (WEFG), 70% ethanol extracted dried gastrodia (EEDG) and 70% ethanol extracted fermented gastrodia (EEFG). DPPH was shown as WEDG = $64.14{\pm}0.89%$, WEFG = $66.21{\pm}1.03%$, EEDG = $82.25{\pm}0.52%$, and EEFG = $82.36{\pm}2.37%$. ABTS was shown as WEDG = $54.15{\pm}1.37%$, WEFG = $60.24{\pm}2.25%$, EEDG = $59.18{\pm}1.86%$, and EEFG = $77.17{\pm}4.23%$. Therefore, ACE activity was dramatically inhibited by EERG while there was no difference of XOase inhibition between EEFG and EERG. Nerve growth factor (NGF) activity was measured and indicated about 40% increased neurite growth effect. To conclude, biologically active compounds of gastrodia were increased by fermentation process. It seems to be that ferment gastrodia enhance the use ranges from functional food to fuctional cosmetics, and to all processing industry.
HAN Bong-Ho;BAE Tae-Jin;CHO Hyun-Duk;KIM Jong-Chul;KIM Byeong-Sam;CHOI Soo-Il
Korean Journal of Fisheries and Aquatic Sciences
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v.23
no.2
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pp.109-124
/
1990
A rapid processing method for fish sauce of high quality stability and favorable flavor was investigated using mackerel waste as starting material. The chopped waste was homogenized with water and hydrolyzed by commercial proteolytic enzymes such as Complex enzyme-2000($2.18\cdot10^4$ U/g solid, Pacific Chem. Co.) and Alcalase ($1.94\cdot10^4$ U/g solid, Novo) in a cylindrical vessel with 4 baffles and 6-bladed turbine impeller. Optimal pH and temperature for the hydrolysis with Complex enzyme-2000 were 8.0 and $50^{\circ}C$, and those with Alcalase were 9.0 and $55^{\circ}C$. In both cases, the reasonabe amount of added water and enzyme concentration based on the waste weight were $40\%,\;3\%$ and hydrolyzing time was 100 min. Thermal treatment of the hydrolysate with $6\%$ of invert sugar for 2 hours at $90^{\circ}C$ was adequated to inactivation of the enzymes and pasteurization of the hydrolysate. Flavor, taste and color of the hydrolysate were improved during the thermal treatment in which the browning reaction products might participate and result in antioxidative and bactericidal effects. Combined use of $0.005\%$ of Caryophylli flos with $6\%$ of invert sugar was also effective for the improvement of taste. Yield of the fish sauce based on the total nitrogen of the raw waste was $93.7\~94.9\%$, and $87.6\~87.9\%$ of the total nitrogen in the fish sauce was in the from of amino nitrogen. The pH, salinity and histamine content of the fish sauce prepared with $15\%$ of table salt were $6.1\~6.2$, $14.0\~14.5\%$ and less than $10mg\%$, respectively. The fish sauce was stable on bacterial growth during the storage of 60 days at $26\pm3^{\circ}C$ and the quality was also maintained.
To develope a rapid processing method for fish sauce, processing conditions of fish sauce from sardine waste was investigated. The chopped waste was homogenized and hydrolyzed by commercial proteolytic enzymes such as Complex enzyme-2000($2.18\cdot10^4$ U/g solid) and Alcalase($1.94\cdot10^4$ U/g solid) in a cylindrical vessel with 4 baffles and 6-bladed turbine impeller. Optimal temperature for the case of hydrolysis with Complex enzyme-2000 was 50 and that with Alcalase was $55^{\circ}C$. In both cases, the reasonable pH, amount of water for homo-genization, enzyme concentration and hydrolyzing time were 8.0, $40\%$ (W/W), $3\%$ and 100 min, respectively. Heating of the filtrated hydrolysate for 2 hours at $90^{\circ}C$ with $6\%$ of invert sugar was suitable for pasteurization of the hydrolysate and inactivation of enzymes. Flavor, taste and color of the hydrolysate was improved during the thermal treatment in which the browning reaction products might participate and result in antioxidative and bactericidal effects. Combined use of $0.005\%$ of Caryophylli flos with invert sugar was also effective for the improvement of taste. Yield of the fish sauce based on the total nitrogen in the raw sardine waste was $91.2\~92.3\%$ and $87.2\~87.8\%$ of the total nitrogen in the fish sauce was in the form of amino nitrogen. The pH, salinity and histamine content of the fish sauce prepared with $15\%$ of table salt were $6.1\~6.2$, $14.2\~14.4\%$ and less than $10mg\%$, respectively. The fish sauce was stable during the storage of 60 days at $26\pm3^{\circ}C$ on bacterial growth and its quality was also maintained.
The biological and antioxidative activity of Phellinus linteus extracts from gradient ethanol concentrations were examined. The phenol contents of Phellinus linteus(28.36 mg/100 ml) was higher in the 80% ethanol extracts than other extracts. Electron donation ability on DPPH of 80% and 90% ethanol extracts(94.12% and 94.14% inhibition) from Phellinus linteus were the highest. The antioxidant activity against water soluble materials of Phellinus linteus ethanol extracts showed totally high inhibition rates above 80%, especially in 80% and 90% ethanol extracts, they showed each 94.12% inhibition and 94.14% inhibition. The inhibition against ABTS [2,2azinobis(3-ethylbenzothiazoline-6-sulfonic acid)] radical decolorization of 80% ethanol extracts was the highest as 96.2%. The antioxidant protection factor (PF) against lipid soluble materials was the highest in 80% ethanol extracts as 1.69 PF, and TBARS of 80% and 90% ethanol extracts were lower as $1.15{\times}100{\mu}M$ and $1.21{\times}100{\mu}M$ than control($1.95{\times}100{\mu}M$. Angiotensin converting enzyme and xanthine oxidase inhibitory activity of 80% ethanol extracts from Phellinus linteus was higher as 95.10%, 85.07% than other extracts. The results to analized of simple phenolic compounds of Phellinus linteus ethanol extrcts with HPLC showed that they were procatecuic acid, caffeic acid and coumaric acid.
Ku, Hwa-Suk;Noh, Jeong-Sook;Kim, Hyun-Ju;Cheigh, Hong-Sik;Song, Yeong-Ok
Journal of the Korean Society of Food Science and Nutrition
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v.36
no.12
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pp.1497-1502
/
2007
The antioxidant effect of Korean cabbage kimchi containing 20% of sea tangle (SK) was studied in the rats fed with high fat diet (HFD) for 8 weeks. The rats (n=40) were divided into four experimental groups as a high fat diet group (HFD), HFD supplemented either with Korean cabbage kimchi used as experimental control (HCK), with SK (HSK), or with J-kimchi (HJK) that was purchased at the local market. The amount of kimchi supplemented was 10%. DPPH radical scavenging activities of SK were significantly higher than those of CK. Kimchi suppressed the hepatic lipid peroxidation significantly, especially by HSK (p<0.05). Inhibition of thiobarbituric acid reactive substances (TBARS) formation in HSK was the greatest among the kimchi groups (p<0.05). The activities of $Cu{\cdot}Zn$-superoxide dismutase (SOD), Mn-SOD and catalase decreased significantly (p<0.05) by kimchi supplementation. SOD and catalase activities of HSK were found to be the lowest among the kimchi groups. The decreased enzyme activity in kimchi group might be due to the less amount of lipid peroxides produced in the rats fed kimchi diet. The lowest antioxidative enzyme activities observed in HSK were in line with those of hepatic POV and TBARS of HSK. Our findings confirmed that kimchi acted as an antioxidant in the high fat fed rats and its antioxidant effect was significantly increased by the addition of sea tangle.
The phenolics of Sambucus sieboldiana var. pendula leaves for functional resources were examined on inhibitory activity against biological enzyme and anti-microbial activity. The amount of phenolic compounds were 11.60±0.18 and 12.43±0.07 mg/g by water and 50% ethanol extraction, respectively. The antioxidative activity of phenolic in extracts was higher than solids. The inhibition activities on angiotensin converting enzyme were 92.08 and 78.33% at 200 ㎍/mL phenolic concentration in water and ethanol extracts, respectively. The xanthine oxidase inhibitory activity were 100% at 200 ㎍/mL phenolic in water and ethanol extracts, respectively. These result was higher than 70.37% of allopurinol as positive control at 200 ㎍/mL. The inhibitory activity against hyaluronidase were each 25.35 and 43.38% in water and ethanol extracts. The water extract from S. sieboldiana var. pendula leaves showed antibacterial activity on the Propionebacterium acnes, Staphylococcus aureus and Streptococcus mutans in water extract and S. mutans in ethanol extract. This result suggests that phenolic from S. sieboldiana var. pendula leaves are suitable as functional foods with anti-hypertension, anti-gout, anti-inflammation and anti-microorganism activities.
Purpose: The purpose of this study was to evaluate the role of coffee in diabetic rats in order to prevent hyperglycemia and hyperlipidemia, and to improve antioxidant enzyme activity in streptozotocin induced diabetic rats. Methods: Thirty two male Sprague-Dawley rats (body weight $200{\pm}5g$) were divided into two groups; diabetic and nondiabetic groups. The groups were each randomly divided into two subgroups; fed control and coffee (5 g coffee powder/kg diet) diets. Diabetes was induced by intramuscular injection of 50 mg streptozotocin/kg body weight. Rats with blood glucose concentrations ${\geq}300mg/dL$ were considered diabetic for these experiments. All rats were fed an experimental diet and deionized water ad libitum for 4 weeks. Results: The results of this study indicate that body weight gain was significantly lower in diabetic groups than in nondiabetic groups regardless of diet. Mean food intake was significantly higher in diabetic groups than in nondiabetic groups, and significantly higher in the coffee group than in the control group in diabetic rats. Food efficiency ratio (FER) was significantly lower in diabetic groups than in nondiabetic groups regardless of diet. The fasting blood glucose of coffee supplemented groups was significantly lower compared with the control group in diabetic and nondiabetic rats. The levels of serum LDL-cholesterol and atherogenic index were significantly lower in the coffee group than in the control group in diabetic and nondiabetic rats, and serum HDL-cholesterol was significantly higher in the coffee group than in control groups. The contents of hepatic triglyceride were significantly lower in the coffee group than in the control group in diabetic and nondiabetic rats. The lipid peroxidation of malondialdehyde (MDA) contents was significantly lower in the coffee group than in the control group in diabetic and nondiabetic rats. Activity of superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase in liver was not significantly different by experimental diets among all groups. Conclusion: In conclusion, effects of 0.5% coffee powder supplemented diet were beneficial on blood glucose and lipids in diabetic rats.
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