• Toxicological Research
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• v.21 no.1
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• pp.45-49
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• 2005

The purpose of this study is to evaluate the free radical scavenging ability and xanthine oxidase inhibitory activity of a complex herbal bath consisted of Artemisiae argyi folium, Angelicae sinensis radix, Ligustici wallichii radix and Angelicae tuhuo radix, and its potential irritation response were also tested for safety use in the rabbits. For antioxidative activity, the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity of the complex herbal bath were examined at five different concentrations (0, 250, 500, 1000 and 2000 ㎍/ml). The concentration of the complex herbal bath required for scavenging DPPH free radical by 50% was 897.2 ㎍/ml. In the inhibition of xanthine oxidase (XO) activity, the concentration of the complex herbal bath required for 50% of inhibition was 221.4 ㎍/ml. In the skin irritation study in rabbit, all animals survived for the duration of the study and the examined skin exhibited no edema, erythema, and eschar formation. In the ocular irritation study in rabbit, after application of the sample to eyes, all of the eyes were normal. In summary, the complex herbal bath has potent antioxidant effects against the DPPH radical and XO and was considered to be a non-irritation bath for safety use.

• The Korean Journal of Mycology
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• v.39 no.1
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• pp.53-56
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• 2011

We collected wild mushroom, Sarcodon aspratus from Deogyu Mt. of Muju, Jeollabuk-do and physiological functionalities of its water extract were investigated. The water extracts from S. aspratus showed the highest antihypertensive angiotensin I-converting enzyme (ACE) inhibitory activity of 74.3% and also showed high anti-gout xanthine oxidase (XOD) inhibitory activity (59.6%). However, tyrosinase inhibitory activity was very low (17.3%), and antioxidant activity and SOD-likely activity were not detected. The ACE inhibitory activity of S. aspratus fruiting body was the highest when powder of the fruiting body was shaked at $30^{\circ}C$ for 24 h by distilled water. Furthermore, the XOD inhibitory activity was also the highest by extraction at $50^{\circ}C$ for 24 h with water.

• Journal of Applied Biological Chemistry
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• v.53 no.3
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• pp.162-169
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• 2010

The solvent extracts of Prunus persica Flos were investigated for the activities of anti-oxidant and anti-inflammation to apply as a functional ingredient for cosmetic products. The electron donating ability of both ethanol (PPE) or acetone (PPA) extracts of P. persica Flos was above 90.0% at the concentration of 500ppm. The superoxide dismutase (SOD)-like activity of P. persica Flos extracts (PPE, PPA) were approximately 40.0% at 1,000 ppm. The xanthine oxidase inhibitory effect of P. persica Flos extracts (PPE, PPA) was approximately 30.0% at 1,000 ppm and equivalent to that of ascorbic acid. Hyaluronidase inhibition activity related to the anti-inflammation effect was 35.0% with the treatment of P. persica Flos extracts (PPW, PPE, PPA) at 1,000 ppm, respectively. In the experiment of anti-inflammation effect, P. persica Flos extracts (PPW, PPE, PPA) inhibited the generation of nitric oxide. In the antimicrobial activity test against the human skin-resident microflora such as Staphylococcus epidermidis and Propionibacterium acnes, a clear zone was identified from 4mg/disc in P. persica Flos (PPE) extract.

• The Journal of Internal Korean Medicine
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• v.22 no.1
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• pp.53-61
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• 2001

Objectives : The following are the results of the experimental studies of Samjasan (SJS) extract on the nitric oxide synthase (NOS) activity and the level of lipid peroxide in the penises of rats. Methods : Cnidii Fructus, Cuscutae Semen, Schizandrae Fructus constitute SJS. 150 g of crushed crude drug was extracted with methyl alcohol, under reflux, for 24 hours, three times; the total extractive was evaporated under reduced pressure to give 28.6 g. Results : In vitro, the SJS extract didn't effect the activity of NOS. However, the SJS extract decreased the activities, the ratio of type conversion of xanthine oxidase, the levels of lipid peroxide, In vitro, after administration of the SJS extract to rats, the activities and ratio of type conversion of xanthine oxidase decreased, but the activity of NOS and the content of nitrite increased. Also, the levels of the superoxide anion radical and lipid peroxide decreased in the penises of rats. But, after administration of the SJS extract to rats, the levels of glutathione did not increase. The effects of the SJS extract did better as the dosage and the length of treatment increased. Conclusions : These results suggest that the SJS extract decreases the activities of free radical generating enzymes which form lipid peroxide and increases the NOS activity in the penises of rats. Therefore, the SJS extract is capable of improving of sexual ability in rats.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1994.04a
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• pp.261-261
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• 1994

Bovine milk xanthine oxidase (E.C.1.1.3.22, XO) purchased from Sigma Chemical Co. had the three protein fragments below 150 kDa on 7.5％ SDS-PAGE, which did not show enzyme activity. To remove these fragments, the enzyme preparation was further purified through Sephadex G-200 column chromatography. Two peaks exhibiting enzymatic activity were separated very closely to the void volume, which were revealed as two different enzyme forms, dimeric and monomeric, confirmed by activity staining on native PAGE. Anti sera-against each of the two enzyme forms were raised by subcutaneous injection at multiple sites on the back of rabbits during 4 weeks. On the immunodiffusion test, it was found that both of the antisera of the two forms could react with each other, which implied that their epitopes were identical In the Western blot analysis of mouse liver cytosol fraction, it was found that rabbit anti-XO antibody bound well with the protein band of monomeric mouse liver XO of about 150kDa. Based on this result, mouse liver cDNA 1 ibrary was screened by in situ hybridizat ion wi th rabbi t anti -XO antibody as probe. Through the immunological screening, recombinant phages giving positive signal by the production of XO were selected and further purified. To validate these clones, purified phages were lysogenized in E. coli Y1089 and their lysates were analysed for enzyme activity and immunoreactivity, It was verified that lysates of the purified recombinant phage lysogens exhibited the enzymatic activity as well as bound wi th XO antibody, when induced by IPTG. The above results assert that selected recombinant phage carries mouse liver XO gene.

• Journal of Microbiology and Biotechnology
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• v.20 no.1
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• pp.88-93
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• 2010

Superoxide dismutase (SOD), glutathione peroxidase (GPX), and catalase (CAT) play crucial roles in balancing the production and decomposition of reactive oxygen species (ROS) in living organisms. These enzymes act cooperatively and synergistically to scavenge ROS. In order to imitate the synergism of these enzymes, we designed and synthesized a novel 32-mer peptide (32P) on the basis of the previous 15-mer peptide with GPX activity and a 17-mer peptide with SOD activity. Upon the selenation and chelation of copper, the 32-mer peptide was converted to a new Se- and Cu-containing 32-mer peptide (Se-Cu-32P) that displayed both SOD and GPX activities, and its kinetics was studied. Moreover, the novel peptide was demonstrated to be able to better protect vero cells from the injury induced by the xanthine oxidase (XOD)/xanthine/$Fe^{2+}$ damage system than its parents. Thus, this bifunctional enzyme imitated the synergism of SOD and GPX and could be a better candidate of therapeutic medicine.

• Environmental Analysis Health and Toxicology
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• v.14 no.3
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• pp.87-93
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• 1999

Antioxidative and scavenging effects were investigated by using two hyaroxycinnamic acids (caffeetannins). such as caffeic acid and chlorogenic acid, on oxidative stress and hepatotoxicity that induced by paraquat. The results are summerized as follows: 1. To assess radical scavenging ability, reduction concentration (IC$\sub$50/) of 1.1 diphenyl-2-dipicrylhydrazine (DPPH) were measured. IC$\sub$50/ values of caffeic acid and chlorogenic acid were 29.7 ${\pm}$0.6 ${\mu}$M and 26.0${\pm}$0.5 ${\mu}$M respectively. Their radical scavenging activities showed concentration-dependent manner. 2. In H$_2$O$_2$-induced hemolysis assay to rat blood, caffeic acid and chlorogenic acid led to different effects, whose hemolysis inhibition ratios at 100 ${\mu}$M were 45.2${\pm}$7.1% and 11.6${\pm}$3.1% respectively 3. In hypoxanthine-xanthine oxidase system producing superoxide anion, caffeic acid and chlorogenic acid showed different inhibitory activities of xanthine oxidase showing 36.8${\pm}$4.3% and 5.4${\pm}$2.3% respectively. 4. To microsomal NADPH dependent cytochrome p-450 reductase in rat liver, paraquat consumed NADPH at a dose-dependent manner from 0 to 1 ${\mu}$M paraquat concentration. Caffeic acid and chlorogenic acid blocked NADPH consumption rates at concentration-dependent manner and inhibition ratios at 100 ${\mu}$M were 67.6% and 59.2% respectively. 5. Administration (30mg/kg, iv) of paraquat to rats caused the marked elevation of glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT), lactate dehydrogenase (LDH), alkaline phosphatase (ALP) and lipid peroxides (LPO) in the serum and lipid peroxides in the microsome as compared to the control group. Serum GOT, GPT, LDH, ALP and LPO and liver microsomal LPO were reduced significantly by caffeic acid (50mg/kg), chlorogenic acid (25mg/kg) and silymarin (150 mg/kg) as compared to the paraquat group. From these results, caffeic acid and chlorogenic acid exerted their antioxidative agents by removing reactive oxygen substance (ROS) and scavenging effects by inhibiting ROS generating enzyme. As a general, two hydroxyeinnamic acids showed the useful compounds for scavenger and reducer on the paraquat induced hepatotoxicity.

• Reproductive and Developmental Biology
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• v.33 no.1
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• pp.49-54
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• 2009

The current study was designed to evaluate the effects of the reactive oxygen species (ROS) generated with a xanthine (X) and xanthine oxidase system (XO) on sperm function and DNA fragmentation in porcine spermatozoa. ROS were produced by a combination of $1,000{\mu}M$ X and 50 mU/ml XO. The ROS scavengers such as superoxide dismutase (SOD) (200 U/ml) and catalase (CAT) (500 U/ml) were also tested. Spermatozoa were incubated for 2 hours in BWW medium with a combination of X-XO supplemented with or without antioxidants at $37^{\circ}C$ under 5% $CO_2$ incubator. Ca-ionophore-induced acrosome reaction, the proportion of swollen spermatozoa under hypo-osmotic condition, malondialdehyde formation for the analysis of lipid peroxidation, and the proportion of DNA fragmentation were determined after 2 hours incubation. The action of ROS on porcine spermatozoa resulted in decreased Ca-ionophore-induced acrosome reaction and membrane integrity, increased the formation of malondialdehyde, and the proportion of sperm with DNA fragmentation(p<0.05). The toxic effects caused by ROS were completely alleviated by CAT in terms of sperm function and characteristics, however SOD did not serve the same scavenger effect as CAT. To conclude, the ROS can cause significant damage to porcine sperm functions and characteristics, which can be minimized by the use of antioxidants.

• Journal of Nutrition and Health
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• v.33 no.6
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• pp.625-631
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• 2000

The purpose of this study was to investigate the effects of vitamin E on the oxidative damage and glomerular filteration rates(GFR) of kidney in streptozotocin(STZ) induced diabetic rats. Sprague-Dawley male rats weihing 100$\pm$10gm were randomly assigned to one normal and three STZ-induced diabetic groups which were subdivided into vitamin E free diet(DM-0E group)40mg vitamin E per kg diet(DM-40E group) and 400mg vitamin E per kg diet (DM-400E group), Vitamin E level of normal group was 40mg per kg diet. diabetes was experimentally induced by intravenous injection of 55mg/kg of body weight of STZ in citrate buffer(pH 4.3) after 4 weeks feeding of experimental diets. Animals were sacrificed at the 6th day of diabetic states. Activities of xanthine oxidase(XOD) in DM-0E DM-40 and DM-400E groups were significantly increased by 133%, 110%, and 74% respectively compared to normal group. The contents of microsomal superoxide radical(O2) in kidney were 106% and 119% higher of DM-0E and DM-40E groups than normal group respectively but that of DM-400E group was similar to normal group. The level of urnary microalbumin in DM-0E group was increased as 5 times much as normal group at the 6th day. Those of DM-40E and DM-400E groups were decreased to 16% and 36% respectively compared to DM-0E group. The content of urinary $\beta$2-microglobulin in DM-0E DM-40E and DM-400E group were increased by 268%, 181% and 163% respectively compared to normal group. GFR in DM-0E and DM-40E were significantly increased but was nor significantly different from DM-400E groups compared to normal group. In conclusion the supplementation of dietary vitamin E reduced peroxidative damage of renal glomerular and renal dysfunction in diabetic rats.

• Journal of Nutrition and Health
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• v.34 no.7
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• pp.734-740
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• 2001

The purpose of this study was to investigate the effect of green tea catechins on the antioxidative defense enzyme activity of kidney in diabetic rats. Sprague-Dawley male rats weighting 100$\pm$10g were randomly assigned to one normal and three STZ-induced diabetic groups; catechin free diet(DM-0C group), 0.25% catechin diet(DM-0.25C group) and 0.5% catechin diet(DM-0.5C group). Diabetes was induced by intravenous of 55mg/Kg body weight of STZ in sodium citrate buffer(pH 4.3) after 4 weeks feeding of experimental diets. Rats were sacrified at the 6th day of diabetic states. Superoxide dismutase(SOD) activity in kidney was decreased by 25% and 20% in DM-0C and DM-0.25C groups compared with normal group, DM-0.5C group was not significantly different when compared with normal group. Glutathione peroxidase(GSHpx) activity in kidney was were no significant differences the diabetic groups compared to normal group. Xanthin oxidase(XOD) activity was increased by 110% and 63% in DM-0C and DM-0.25C groups compared with normal group, DM-0.5C group was not significantly different when compared with normal group. The contents of superoxide radical(O$_2$)in kindney were 116% and 33%, respectively, higher in DM-0C and DM-0.25C groups than normal group. DM-0.5C group and normal groups were similar levels in their superoxide radical contents of kidneys. Levels of TBARS(thiobarbituric acid reactive substance) in kidney were increased by 62% in DM-0C group, when compared with normal group, but those of DM-0.5C group were similar to that of normal groups. These results indicate that free radical generation system was weakened and free radical scavenger system was enhance in kidney of STZ-induced diabetics rats by dietary catechin. Thereby it may reduce renal disorders such as oxidative damage and aging of tissue.