Achillea sibirica Ledeb. is widely distributed in Korea and has been often used as folk medicine in peptic and tonic. As one of our searches for bioactive (anti oxidation) compounds from medicinal plants, we studied Achillea sibirica Ledeb. (Compositae). Antioxidant activity of Achillea sibirica was determined by measuring lipid peroxide produced when a mouse liver homogenate was exposed at $90^{\circ}C$ using 2-thiobarbituric acid (TBA) and by evaluation the radical scavenging activity on 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical. Whole parts of Achillea sibirica was extracted with methanol and its extracts was fractionated with organic solvent; n-Hexane, methylene chloride, ethyl acetate, n-Butanol. EtOAc fraction exhibited antioxidant activity and From its, two flavonoid glycosides were isolated by silica gel and gel filtration colume chromatography and identified to kampferol 3-O-glucoside and luteolin 7-O-neo-hesperidoside, respectively, by physico-chemical and spectroscopical method. At antioxidant activity test for two compounds isolated, antioxidant activity was showed too. And from hexane fraction sterol was is isolated and identificated to mixture of campesterol, stigmasterol, and ${\beta}-sitosterol$.
The effect of nitric oxide (NO) on antioxidant system and protective mechanism against oxidative stress under UV-B radiation was investigated in leaves of maize (Zea mays L.) seedlings during 3 days growth period. UV-B irradiation caused a decrease of leaf biomass including leaf length, width and weight during growth. Application of NO donor, sodium nitroprusside (SNP), significantly alleviated UV-B stress induced growth suppression. NO donor permitted the survival of more green leaf tissue preventing chlorophyll content reduction and of higher quantum yield for photosystem II than in non-treated controls under UV-B stress, suggesting that NO has protective effect on chloroplast membrane in maize leaves. Flavonoids and anthocyanin, UV-B absorbing compounds, were significantly accumulated in the maize leaves upon UV-B exposure. Moreover, the increase of these compounds was intensified in the NO treated seedlings. UV-B treatment resulted in lipid peroxidation and induced accumulation of hydrogen peroxide ($H_2O_2$) in maize leaves, while NO donor prevented UV-B induced increase in the contents of malondialdehyde (MDA) and $H_2O_2$. These results demonstrate that NO serves as antioxidant agent able to scavenge $H_2O_2$ to protect plant cells from oxidative damage. The activities of two antioxidant enzymes that scavenge reactive oxygen species, catalase (CAT) and ascorbate peroxidase (APX) in maize leaves in the presence of NO donor under UV-B stress were higher than those under UV-B stress alone. Application of 2-(4-carboxyphenyl)-4, 4, 5, 5-tetramethylimidazoline-1-oxyl-3- oxide (PTIO), a specific NO scavenger, to the maize leaves arrested NO donor mediated protective effect on leaf growth, photosynthetic pigment and free radical scavenging activity. However, PTIO had little effect on maize leaves under UV-B stress compared with that of UV-B stress alone. $N^{\omega}$-nitro-L-arginine (LNNA), an inhibitor of nitric oxide synthase (NOS), significantly increased $H_2O_2$ and MDA accumulation and decreased antioxidant enzyme activities in maize leaves under UV-B stress. This demonstrates that NOS inhibitor LNNA has opposite effects on oxidative resistance. From these results it is suggested that NO might act as a signal in activating active oxygen scavenging system that protects plants from oxidative stress induced by UV-B radiation and thus confer UV-B tolerance.
Journal of the Korean Society of Food Science and Nutrition
/
v.33
no.2
/
pp.249-254
/
2004
Effect of mulberry tree powders on the antioxidant activity of submerged -liquid culture of mushrooms was investigated. Agaricus blazei (AB), Hericicum erinacium (HE), Pleurotus ostreatus (PO), Phellinus linteu (PL) and Paecilomyces japonicus (PJ) were cultured in a shaking incubator (200 rpm, $25^{\circ}C$) for 7 days in culture media: 1) basal medium (BM) and 2) BM+1% mulberry tree powders (BMM). Hot water extracts from the submerged-liquid cultures of mushrooms and BMM were freeze-dried for the measurement of antioxidant activity, of which reaction mixture (25 mL: 10 mL of 0.2 M sodium phosphate buffer, pH 8.0; 4.5 mL distilled water; and 10.5 mL ethanol) contained 275 $\mu$mol linoleic acid and one mg test sample. The reaction mixture was incubated in a shaking incubator (200 rpm, 4$0^{\circ}C$) for 16 days. Peroxide value (POV) was measured for a period of over 16 days, and malonaldehyde (MA) was determined only for samples from the day 16 of incubation. Mycelial weight of mushroom strains cultured in BMM was greater than BM. The antioxidant activities of AB-cultured in BW (AB-BMM) and HE-cultured in BMM (HE-BMM) were superior to those of other mushroom strains-cultured in BMM or BM and of BMM. These results suggest that mulberry tree powders enhance the antioxidant activity of submerged-liquid culture of mushroom strains. The AB-BMM and HE-BMM were the most active cultures.
Objective: The aim of this work was to assess the effect of fermented blueberry (FB; 2%, 4%, and 6%) on the oxidative stability and volatile molecule profiles of emulsion-type sausage stored at 4℃ for 28 days. Methods: The antioxidant activity of FB was determined through radical-scavenging activity against 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl radicals. Four formulations of sausage treatments with different FB levels (0%, 2%, 4%, 6%) were prepared, then peroxide value (POVs), thiobarbituric acid-reactive substances (TBARS) values, protein carbonyls and thiol groups were measured. The aroma profiles of sausages for each treatment was also determined. Results: The half maximal inhibitory concentration indicated that FB had greater scavenging ability than ascorbic acid against DPPH and hydroxyl radicals. Sausages with FB significantly retarded increases in POVs and TBARS, as well as in the content of protein carbonyls during all storage days (p<0.05). Particularly, 4% and 6% FB-treated sausages had better oxidation inhibition effects. However, FB accelerated the reduction in thiol groups (p<0.05). Additionally, FB inhibits the excessive formation of aldehyde compounds; for example, hexanal, which may cause rancid flavors, decreased from 58.25% to 19.41%. FB also created 6 alcohols (i.e., 2-methyl-1-propanol, 3-methyl-1-butanol, and phenylethyl alcohol), 5 ester compounds (i.e., ethyl acetate, ethyl lactate, and ethyl hexanoate) and 3-hydroxy-2-butanone in the sausages that contribute to sausage flavors. The principal component analysis showed that the aroma profiles of sausages with and without FB are easily identified. Conclusion: The addition of FB could significantly reduce the lipid and protein oxidation and improve oxidative stability for storage. Also, adding FB could inhibit rancid flavors and contribute to sausage flavors.
Kim, Ki-Woong;Kim, Hyeon-Yong;Park, Sang-Shin;Jeong, Hyo-Seok;Park, Sang-Hoi;Lee, Jun-Yeon;Jeong, Jae-Hwang;Moon, Young-Hahn
BMB Reports
/
v.32
no.3
/
pp.232-238
/
1999
Sex differences in the induction of microsomal cytochrome P-450 (CYP) and the activities of several related enzymes of Sprague-Dawley rats treated with 1-bromopropane (1-BrP) were investigated. Male and female rats were exposed to 50, 300, and 1800 ppm of 1-BrP per kg body weight (6 h a day,S days a week, 8 weeks) by inhalation. The mean body weight of 1-BrP treated groups increased according to the day elapsed, but four and five weeks respectively after the start of the exposure, the mean body weight of male and female rats had significantly reduced in the group treated with 1800 ppm 1-BrP compared with the control group (p<0.01). While the relative weights of liver increased in both sexes, statistical significance in both sexes was found only in the group receiving 1800 ppm/kg of 1-BrP (p<0.01). The total contents of CYP, $b_5$, NADPH-P-450 reductase, NADH $b_5$ reductase, ethoxyresorufin-O-deethylase (EROD), pentoxyresorufin-O-dealkylase (PROD), and p-nitrophenol hydroxylase (pNPH) activities were examined for the possible effects of 1-BrP. No significant changes in the CYP and $b_5$ contents, NADPH-P-450 reuctase, NADH $b_5$ reductase, ethoxyresorufin-O-deethylase (EROD), and pentoxyresorufin- O-dealkylase (PROD) were observed between the control and treated groups. The activity of pNPH increased steadily with the increase in the concentration of 1-BrP in both sexes, but was significantly increased only in the 1800 ppm-treated group of male rats (p<0.05). When Western blottings were carried out with three monoclonal antibodies (MAb 1-7-1, MAb 2-66-3, and MAb 1-98-1) which were specific against CYP1A1/2, CYP2B1/2, and CYP2E1, respectively, a strong signal corresponding to CYP2E1 was observed in microsomes obtained from rats treated with 1-BrP. Glutathione S-transferase (GST) activity and the content of lipid peroxide significantly increased in the treated groups compared with the control group (p<0.05). These results suggest that 1-BrP can primarily induce CYP2E1 as the major form and that GST phase II enzymes play important roles in 1-BrP metabolism, showing sex-dependence in the metabolic mechanism of 1-BrP in the rat liver.
Objectives: Selaginella bryopteris L. (family: Selaginaceae), is often used in traditional Indian systems of medicine for the prevention and cure of several disorders and for the treatment of patient with spermatorrhoea, venereal disease, constipation, colitis, urinary tract infections, fever, epilepsy, leucorrhoea, beri-beri and cancer. It is also used as a strength tonic. This study aimed to evaluate the mechanisms underlying the anti-inflammatory effects of topically administered aqueous, polar and non-polar methanolic fractions ($10mg/20{\mu}L$) of Selaginella bryopteris. Methods: An acute oral toxicity study of Selaginella bryopteris at doses from 250 to 2,000 mg/kg body weight (bw) was performed. Aqueous, polar and non-polar methanolic extracts ($10mg/20{\mu}L$) applied topically for 5 days were evaluated for their anti-inflammatory effects against 12-tetra-O-decanoyl phorbol acetate (TPA)- induced inflammation by using the redness in the ear, the ear's weight (edema), oxidative stress parameters, such as lipid-peroxide (LPO) and nitric oxide (NO), and the pro-inflammatory cytokines involved in inflammation, such as tumour necrosis factor $(TNF)-{\alpha}$, interleukin $(IL)-1{\beta}$ and IL-6. Indomethacine ($0.5mg/20{\mu}L$) was used for the positive control. Results: Selaginella bryopteris produced no mortalities when administered orally at doses from 250 to 2,000 mg/kg bw. Topical treatment with the non-polar methanolic fraction ($10mg/20{\mu}L$) significantly suppressed redness ($2.4{\pm}0.5$) and edema ($30.4{\pm}1$) and effectively reduced the LPO level ($32.3{\pm}3.3$). The NO level was ($8.07{\pm}0.55$), and the $TNF-{\alpha}$, $IL-1{\beta}$, and IL-6 levels were decreased to $69.6{\pm}15.5$, $7.7{\pm}4.8$ and $82.6{\pm}5.9$, respectively. Conclusion: This study demonstrated for the first time the mechanisms underlying the anti-inflammatory effect of medicinal plants like Selaginella bryopteris and quantified the pharmacological interactions between them. The present study showed this herbal product to be a promising anti-inflammatory phytomedicine for the treatment of patients with inflammatory skin diseases.
Journal of the Korean Society of Food Science and Nutrition
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v.22
no.4
/
pp.392-397
/
1993
The present work was undertaken to investigate the protective mechanism of Oenanthe iavanicu n-butanol extract on the carbon tetrachloride-induced hepatotoxicity in mice. It was observed that a striking enhancement of serum alanine aminotransferase and hepatic lipid peroxide content after carbon tetrachloride administration were markedly decreased by the presentment of Oenanthe javanica extract for 5 days. It was also observed that the hepatic aniline hydroxylase, catalase, glutathione S-transferase activity and glutathione content were not changed by the injection of Oenanthe javanica extract for 5 days. Whereas, hepatic xanthine oxidase activity was inhibited by the treatment of Oenanthe javanica extract for 5 days. After treatment with Oenanthe javanica extract, xanthine oxidase activity was decreased with dose and time-dependent manner as compared to control group. However, hepatic xanthine oxidase activity was not affected by the addition of Oenanthe javanica extract in vitro. These results suggest that the inhibition of hepatic xanthine oxidase activity by the injection of Oenanthe javanica extract is believed to be a possible protective mechanism for the carbon tetrachloride-indured hepatotoxicity in mice.
Journal of the Korean Society of Food Science and Nutrition
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v.26
no.2
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pp.344-350
/
1997
The present study was carried out to investigate the effects of zinc and vitamin E on the antioxidative defense mechanism in the liver of streptozotocin(STZ)-induced diabetic rats. Levels of blood glucose of STZ-diabetic rats were higher than that of control, but ZDM($ZnSO_{4}$ 10mg/kg injection+STZ) group was lower than those of DM(STZ injection) and EDM(vitamin E 400mg/kg diet+STZ) group. Levels of plasma insulin were lower in all three STZ-diabetic groups than those of control. Thiobarbituric acid reactive substances(TBARS) peroxide values(LPO) in liver were increased 2.3-fold in DM group compared with those of control, while LPG in ZDM group was lower than that of DM group, and EDM group had similar tendency compared with that of control. Reduced glutathione(GSH) contents of liver were decreased in DM group compared with those of control, but increased 2.3, 1.7-fold in ZDM and EDM groups, respectively, compared with those of DM group. Oxidized glutathione(GSSG) was increased in DM group compared with control and GSSG in ZDM and EDM group were lower than that of DM group. GSH/GSSG ratio had similar tendency compared with results of GSH. The activities of free radical scavenging enzymes such as superoxide dismutase, glutathione peroxidase and glutathione S-transferase were significantly decreased in DM group compared to those of control, but higher in ZDM and EDM groups than those of DM group. The metallothionein contents in liver and kidney were increased in DM and EDM groups were remarkably increased 20, 5.3-fold in ZDM group, compared with those of control.
In the present paper, we investigated the quality stability of mackerel based burger during frozen storage. The moisture and crude lipid contents of products were $60.2{\sim}61.5%$ and $14.7{\sim}14.9%$, respectively. The pH showed a tendency of decrease, while volatile basic nitrogen content showed a tendency of increase during frozen storage. The histamine content was $2.60{\sim}2.81\;mg/100g$, and this value increased slowly during frozen storage. The increasing ratio in the peroxide value, carbonyl value, TBA value, fatty acid composition and color value of vacuum packed product and antioxidants added product were lower than those of air packed product. The texture profile analysis parameters such as hardness and toughness showed a tendency of a slight increase in air packed product and showed less increase in vacuum packed product and antioxidants added product. From the results of chemical experiments and sensory evaluation during frozen storage, it is concluded that the vacuum packed mackerel based burger and antioxidants added mackerel based burger were good condition for preserving the quality during frozen storage of 60 days.
Korean bennudagrass collections showed diverse genetic variations in their morphology, growth habit, and cytological aspects. Chromosome number and nuclear DNA content of the bennudagrasses indicated a ploidy level ranging from triploid (2n=3x) to hexaploid (2n=6x). In this study, we investigated the different responses of antioxidant enzymes (superoxide dismutase, catalase, peroxidase, ascorbate peroxidase) and cell membrane stability of those bennudagrass cytotypes to lower temperature and shorter day length, which meets a dormant induction in Korea. All the antioxidant enzymes were found to be higher during dormant stage, while the heme-containing catalase which converts hydrogen peroxide ($H_2O_2$) to water and oxygen molecules was activated before dormant initiation in the three cytotypes except for hexaploid bennudagrass. The triploid and tetraploid which exhibited relatively finer leaves and a rapid establishment speed were found to show increased activities of superoxide dismutase and peroxidase enzyme. The malondialdehyde(MDA) which is a product of lipid peroxidation in the cell membrane damaged by the hydroxyl radical was increased in all cytotypes as temperature declined, and tri- and tetraploids which had more protective antioxidant enzymes demonstrated a significantly lower MDA production. Similarly electrolyte leakage was higher in penta- and hexaploidy, seemingly more damage to cell membrane when low temperature was implemented. Results indicated that antioxidant responses of different cytotypes were genetically specific, which needs to be investigated the relevance with the low temperature tolerance in the bermudagrass further at the molecular level.
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