• Biomedical Science Letters
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• v.9 no.2
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• pp.75-84
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• 2003

To evaluate the influence of hepatic oxygen free radical systems on liver injury by topical p-phenylenediamine (PPD) application on rat skin, PPD (25 mg/16.5 $\textrm{cm}^2$) was topically applied to the abdominal region 5 times every other day and sacrificed. By PPD treatment, increasing rate of liver weight/body weight (%), serum activities of alanine aminotransferase and aspartate aminotransferase and decreasing rate of microsomal glucose-6-phosphatase activity were higher in the rats fed tungstate supplemented diet than those fed a standard diet. These findings indicate that group fed tungstate supplemented diet have more severe liver injury compared with group fed standard diet on topical PPD application. However, the activities of oxygen free radical generating enzymes such as xanthine oxidase (XO) and cytochrome P450 dependent aniline hydroxylase and those of oxygen free radical scavenging enzymes were not found to be different between these two animal groups. In the present study, a novel monitoring method to detect the generating of oxygen free radicals in liver extract was devised. Throughout this method, the oxidized PPD produced by oxygen free radicals was determined colorimetrically. The increasing rate of PPD oxidation by liver homogenate was higher in tungstate fed animals than in standard diet fed ones. Among the fractionations of liver extract, the mitochondrial and postmitochondrial fractions in the liver extract of tungstate fed animals led to a higher availability of PPD oxidation by PPD treatment compared with standard diet fed ones. In conclusion, these results suggest that an enhanced liver injury in tungstate fed animals treated with PPD may be due to oxygen free radicals produced in other systems except oxygen free radicals generating from cytosolic XO system. Especially, oxidative availability by PPD can be used for oxygen free radical detection in some tissue.

• Journal of the Korean Society of Physical Medicine
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• v.4 no.3
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• pp.141-148
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• 2009

Purpose：The purpose of this study was analyze the effect combination exercise program on plasma total antioxidant capacity and free oxygen radical according to exercise frequency of elderly. Age range of subject is 65~70 years. Methods：Subjects divided into three groups: control group(0-time), week-3 times group(3-times), week-5 times group(5-times). Each group were performed combination exercise during 8 weeks. Results：The results of each group by ANOVA free oxygen radical have a change(p<.05). We performed comparison of total antioxidant capacity and free oxygen radical pre-test and post-test on each groups. Total antioxidant capacity was increased in the 3-times and 5-times groups but there have not significant. Total antioxidant capacity is improve better than to 5-times. Free oxygen radical is significant increased in the 0-time (p<.05). But 5-times but 3-times is no significant decrease. Free oxygen radical is improve better than to 3-times. Conclusion：In the old people, exercise frequency week 3 times doing appeared effectively in improvement of the free oxygen radical and 5 times doing appeared effectively in improvement of the total antioxidant capacity. So rightly must apply a exercise frequency well in characteristic of old person each person.

• Biomedical Science Letters
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• v.5 no.1
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• pp.51-58
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• 1999

To evaluate an effect of liver damage on the dermal oxygen free radical metabolizing enzyme activities, the $CCl_4$ (0.1 ml/ 100 g body wt., 50% $CCl_4$ in olive oil) was intraperitoneally given to the rats every other day for 2 weeks. Based on the histopathological findings, liver weight (%), serum alanine aminotransferase, xanthine oxidase activities and hepatic lipid peroxide contents, the animals were induced severe liver damage. In the present liver damaged animal, all the activities of dermal scavenging enzymes such as superoxide dismutase, catalase and glutathione peroxidase were significantly decreased compared with central. And under the cytochemical electron microscopy the more coarse granules of cerrous perhydroxide were found compared with the control. In conclusion, the $CCl_4$-induced liver damage may influence upon the activities of some dermal oxygen free radical scavenging enzymes.

• Journal of Haehwa Medicine
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• v.9 no.1
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• pp.305-317
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• 2000

To prove the effect of Sagunjatang(SGJT) and Samultang(SMT) extract on the wave of Human Body and Active Oxygen experimentally, QRS & Free Radical of extract and precipitate of SGJT and SMT was measured. The results were summarized as follows ; 1. SGJT extract and precipitate, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & pituitary gland. 2. BaekBokRung of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of heart & spleen. 3. BaekChul and Gamcho of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of stomach & duodenum. 4. YinSam of SGJT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & spleen. 5. SMT extract and precipitate, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & uterus. 6. SukJiHwang of SMT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of immunity & liver. 7. DangGui of SMT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of heart & spleen. 8. ChunGung of SMT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of spleen & pituitary gland. 9. BaekJakYak of SMT, as a result of measuring QRS and Free Radical, had a considerable effect on the function of stomach & duodenum. 10. SMT extract had an effect on the function of female Urogenital system, SGJT extract had an effect on the function of male Urogenital system. These results suggested that SGJT and SMT extract might be usefully applied for suppresing of Active Oxygen formation, preventing the aging, curing all the disease resulted from Active Oxygen.

• Korean Journal of Exercise Nutrition
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• v.13 no.1
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• pp.29-35
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• 2009

The purpose of this study was to investigate the effects of oral supplementation of coenzyme Q10 (CoQ10) for 4 weeks on the plasma free oxygen radical and total antioxidant capacity at resting and after one bout exercise in healthy old men. Thirty volunteers with an average (+/-SD) age of 62.59+/-5.3 years participated in this study and were divided with three groups; CoQ10 (200 mg daily) group, vitamin C & E (800mg, 400 IU daily) group, and placebo group. A cycle exercise (60% HRR) test was performed at the end of study. Blood samples were taken for the analyses at rest and pre-, post-, 30min after cycle exercise, before and after the 4 weeks of supplementation. After supplementation, there were no significant differences in the plasma free oxygen radical levels and total antioxidant capacity at resting. Plasma free oxygen radical level and total antioxidant capacity in three groups were significantly elevated after exercise, however, it did not vary significantly between groups. CoQ10 supplementation showed significant difference in total antioxidant capacity during recovery phase compared with placebo group. Our results demonstrated that supplementation of CoQ10 in healthy old men improve blood total antioxidant capacity after one bout exercise, despite no alteration of plasma free oxygen radical levels.

• Toxicological Research
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• v.17 no.1
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• pp.33-39
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• 2001

To evaluate the skin toxicity oj topical toluene application, toluene (35 mg/$cm^2$) was sequentially applied to the portion rat skin for five days. The topical toluene application resulted in increased xanthine oxidase activity and CYP content, and significantly decreased superoxide dismutase and glutathione peroxidase activities at five days in rat skin. Especially catalase activity was remarkably decreased in toluene-applied rat skin. And benzylalcohol dehydrogenase activity showed also a significant decrease in toluene-applied skin. On the other hand, histopathological ultrastructural examination revealed disrupted epidermal basement membrane, rared intercellular adhensions and degenerated keratin layer due to topical toluene application. Increased deposit of cerrous perhydroxide resulted from reaction with $H_2O_2$was abserved in toluene-treated animals. These results indicate that oxygen free radical may be responsible for ultrastructural changes in skin tissue by toluene application to rat skin.

• The Journal of Korean Physical Therapy
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• v.11 no.3
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• pp.115-121
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• 1999

The effects of scald bum Injury ($40-45\%$ of total body surface area), there were not inhalation and secondary infection, on the histological changes and the levels of oxygen free radical generating and scavenging enzymes have been determined in liver tissue of rat models. It was found that dermal epithelium was left out with edema of dermis layer and hydorpic swelling of hepatocytes, Burn injury increased liver weight (L.W./B.W.) and serum aspartate aminotransferase content (pThe data of this study suggest that liver damage Induced by scald burn injury leads to dysbalance of oxygen free radical generating and scavenging enzymes.

• Journal of Environmental Health Sciences
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• v.28 no.2
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• pp.81-88
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• 2002

Effect of cyclohexanone treatment on the activities oxygen free radical and cyclohexanone metabolizing enzyme in acute liver damaged rats, was investigated. Acute liver damage was induced in rats with pretreatment of 50% $CCl_4$ in olive oil(0.1ml/100g body wt) intraperitoneally 3 times every other day. Cyclohexanone(1.56g/kg body wt, i.p.) was administered to the animals 24 hours after the last Pretreatment of CC1$_4$. Rats were sacrificed at 4 hours after injection of cyclohexanone. On the basis of liver weight/body weight(％), serum levels alanine aminotransferase activity and hepatic protein content, cyclohexanone treatment to acute liver damaged animals led to the more enhanced liver damage. On the other hand, injection of cyclohexanone to the rats led to the increased activities of hepatic cytochrome P-450 dependent aniline hydroxylase and xanthine oxidase. Furthermore, by treatment of cyclohexanone to the acute liver damaged rats hepatic xanthine oxidase activity was more increased than the $CCl_4$ treated rats. In case of oxygen free radical scavenging system, the hepatic glutathione content and the activities of hepatic glutathione S-transferase, catalase, superoxide dismutase were generally increased by injection of cyclohexanone to rats, and the hepatic glutathione content, catalase and alcohol dehydrogenase activities were more decreased in liver damaged rats by the treatment of cyclohexanone. In conclusion, the cyclohexanone treatment to acute liver damaged rats led to enhancement of liver damage that may be due to oxygen free radical together with cyclohexanone.

• Journal of the Korean Society of Food Science and Nutrition
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• v.29 no.2
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• pp.268-273
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• 2000

To investigate an effect of the ethanol extract of Lycium chinense(EELC) on the activities of enzymes scavenging oxygen free radicals or detoxicating alcohol. The ground Lycium chinense was extracted with 30% edible ethanol and then diluted with 6% ethanol to contain 2% EELC(w/v). Three different groups of male Sprague-Dawley rats had taken a drink EELC, ethanol(ETH) or water(control), respectively for 2 months. At the end of experimental period, the animals were sacrificed and obtained the following findings. The EELC-treated animals showed the highest activity of hepatic glucose-6-phosphatase among three groups. The activities of xanthine oxidase and cytochrome p-450 from EELC treatment group were lower than those from ETH-treated group. However, the activity of superoxide dismutase was higher in the EELC-treated group than the ETH-treated(p<0.005). Furthermore, hepatic alcohol or aldehyde dehydrogenase activity, and glutathione content and glutathione peroxidase were significantly higher in EELC-treated animals than in ETH-treated those. The activity of glutathione S-transferase in liver was appeared the orderly higher value in EELC, ETH and control-treated group. As the result, EELC may affect the reduction of oxygen free radical production and help the detoxication of ethanol.

• Journal of Food Hygiene and Safety
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• v.14 no.2
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• pp.179-185
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• 1999

Previous studies have shown that methanol extract and its butanol fraction of Carthamus tinctorius L. Semen have the hepatoprotective effect on the CCl4-induced hepatotoxicity. The hepatoprotective effect of the subfractions of butanol fraction has been evaluated by analyzing oxygen free radical scavenging enzyme activities and histopathological examinations. In BS-5 subfraction treated group, the activity of superoxide dismutase has been significantly increased as compared with that of CCl4, treated rats. Antioxidant activity has been evaluated by the examination of the scavenging activity against 1,1-diphenyl-2-picrylhydrazyl radical. BS-5 subfraction has shown strong antioxidant activities. The histopathological examination showed that the treatment of BS-5 subfraction has relieved the ballooning degeneration of hepatocytes which had been generated by CCl4. It appears that the protective effect of BS-5 subfraction would be mediated of the attenuation of lipid peroxidation by acting as a free radical scavenger, which were based on the increase of superoxide dismutase activity.