• 한국식품과학회지
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• 제28권1호
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• pp.184-189
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• 1996

냉이(Capsella bursa-pastoris)로부터 산소독성에 영향을 미치는 superoxide anion radical에 대하여 소거작용을 하는 물질을 분리하고 이 물질의 이화학적 성질을 검토하였다. 냉이를 에탄올로 추출한 후 용매분획과 각종 column chromatographies (Amberlite XAD-2, Sephadex LH-20, Bio gel P-2, ODS)를 통해 정제하였고, 최종적으로 FPLC (Fast protein liquid chromatography)를 사용하여 활성의 단일물질을 얻었다. 냉이 에탄올추출물 100 g으로부터 0.25 g의 정제물질을 얻었으며, superoxide anion radical을 50% 소거하는 농도$(IC_{50})$는 $0.58\;{\mu}g$이었다. 이 물질에 대해 각종 이화학적 성질을 검토한 결과 phenol성 화합물의 배당체로 추정하였다.

• 한국식품위생안전성학회지
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• 제14권2호
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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.

• 한국식품저장유통학회지
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• 제9권2호
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• pp.253-259
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• 2002

민들레 잎과 뿌리로부터 물추출물을 제조하여 항산화 활성 및 라디칼 소거활성을 분석하기 위하여 linoleic acid에 대한 과산화물 생성저해율, DPPH radical에 대한 소거활성, chemiluminescence를 이용한 hydroxyl radical에 대한 소거활성, EPR을 이용한 superoxide anion radical에 대한 소거활성및 hydrogen peroxide에 대한 소거활성을 측정하였다. 그 결과, 민들레 잎의 물추출물이 뿌리의 물추출물 보다 지방산에 대한 과산화물 생성 저해율이 높았고, DPPH radical, hydroxyl radical, superoxide anion radical 및 hydrogen peroxide에 대한 소거활성 역시 매우 높은 것으로 나타났다.

• Toxicological Research
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• 제13권4호
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• pp.359-365
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• 1997

Many factors are known to be responsible for cerebral ischemic injury, such as excitatory neurotransmitters, increased intraneuronal calcium, or disturbance of cellular energy metabolism. Recently, oxygen free radicals, formed during ischemia/reperfusion, have been proposed as one of the main causes of ischemia/reperfusion injury. Therefore, to investigate the role of oxygen free radical during ischemia/reperfusion, in the present study the effect of endogenous oxygen free radical scavenger, superoxide dismutase / catalase(SOD / catalase) on the release of [$^3$H]-5-hydroxytryptamine([$^3$H]-5-HT) during hypoxia/reoxygenation in rat hippocampal slices was measured. The hippocampus was obtained from the rat brain and sliced 400 gm thickness with manual chopper. After 30 min's preincubation in the normal buffer, the slices were incubated for 20 min in a buffer containing [$^3$H]-5-HT(0.1 $\mu$M, 74 $\mu$Ci) for uptake, and washed. To measure the release of [$^3$H]-5-HT into the buffer, the incubation medium was drained off and refilled every ten minutes through a sequence of 14 tubes. Induction of hypoxia for 20 min (gassing it with 95% N$_2$/5% CO$_2$) was done in the 6th and 7th tube, and oxygen free radical scavenger, SOD / catalase was added 10 minutes prior to induction of hypoxia. The radioactivity in each buffer and the tissue were counted using liquid scintillation counter and the results were expressed as a percentage of the total activity. When slices were exposed to hypoxia for 20 min, [$^3$H]-5-HT release was markedly decreased and a rebound release of [$^3$H]-5-HT was observed on the post-hypoxic reoxygenation period. SOD / catalase did not changed the release of [$^3$H]-5-HT in control group, but inhibited the decrease of [$^3$H]-5-HT release in hypoxic period and rebound increase of [$^3$H]-5-HT in reoxygenation period. This result suggest that superoxide anion may play a role in the hypoxic-, and reoxygenation-induced change of [$^3$H]-5-HT release in rat hippocampal slices.

• 대한한방부인과학회지
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• 제21권2호
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• pp.76-96
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• 2008

Purpose: This study was performed to evaluate anti-inflammatory effects of Jogantanggagambang(JGTG). Methods: In the study of anti-oxidant activities, JGTG was investigated by DPPH radical scavenger activity, superoxide dismutase activity and superoxide anion radical scavenger activity. In the study of anti-inflammatory effects, JGTG was investigated using cultured cells and murine models. As for the parameters of inflammation, levels of several inflammatory cytokines and chemical mediators which are known to be related to inflammation were measured in mouse lung fibroblast cells(mLFCs) and RAW264.7 cells. Results: 1. JGTG showed a safety in cytotoxicity and toxicity of liver. 2. JGTG effected scavenging activity on DPPH free radical, superoxide dismutase and superoxide anion radical. 3. JGTG in RAW 264.7 cell decreased IL-$1{\beta}$ mRNA expression, IL-6 mRNA expression, TNF-${\alpha}$ mRNA expression at 50, $100{\mu}g/m{\ell}$ and also decreased NOS-II mRNA expression at $100{\mu}g/m{\ell}$, and decreased COX-2 mRNA expression at 10, 50, $100{\mu}g/m{\ell}$. 4. JGTG in RAW 264.7 cell decreased significantly IL-$1{\beta}$, IL-6 and TNF-${\alpha}$ at 50, $100{\mu}g/m{\ell}$. 5. JGTG inhibited significantly IL-$1{\beta}$, IL-6 and TNF-${\alpha}$ production in serum of acute inflammation-induced mice. 6. JGTG decreased significantly IL-$1{\beta}$ mRNA production in spleen tissue. Conclusion: These results suggest that JGTG can be used for treating diverse female diseases caused by inflammation

• Journal of Nutrition and Health
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• 제34권7호
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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.

• 한국환경농학회지
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• 제16권1호
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• pp.14-18
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• 1997

$SO_2$에 대한 양버즘나무의 내성을 증대시키고자 uniconazole, sodium benzoate 또는 ascorbic acid를 단용 또는 복합처리한 후 $SO_2$에 의한 가시피해정도, 엽록소함량 및 유리기 제거제로 활성산소의 독성을 중화시킬 수 있는 superoxide dismutase(SOD) 및 peroxidase(POD)의 활성변화를 조사하였다. Uniconazole처리에 의한 $SO_2$ 피해경감 효과는 SOD불활성제인 diethyldithiocarbamate(DDTC)를 다시 처리하므로써 가시피해가 증가하였고 SOD와 POD의 활성도 감소하였다. 유리기 제거제인 sodium benzoate와 ascorbic acid처리는 SOD나 POD 활성에 영향을 주지않으면서 $SO_2$의 피해를 경감시키고, DDTC의 $SO_2$피해증가 효과를 ascorbic acid 처리로 감소시킬 수 있었다. 이상의 결과로 미루어 uniconazole은 식물체내에서 산화방지물질의 역할을 하는 SOD의 활성을 증대시켜 $SO_2$가스의 피해를 경감시키는 효과가 인정되며, ascorbic acid와 sodium benzoate의 내성 증대 효과는 식물체내의 SOD나 POD 활성 증진과는 관계가 없는 것으로 판단된다.

• 대한한방부인과학회지
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• 제21권4호
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• pp.69-89
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• 2008

Purpose: This study was performed to evaluate anti-oxidant activities and anti-inflammatory effects of Sungyoutanggagambang(SYTG). Methods: In the study of anti-oxidant activities. SYTG was investigated by DPPH radical scavenger activity. superoxide dismutase activity and superoxide anion radical scavenger activity. In the study of anti-inflammatory effects. SYTG was investigated using cultured cells and murine models. As for the parameters of inflammation. levels of several inflammatory cytokines and chemical mediators which are known to be related to inflammation were measured in mouse lung fibroblast cells(mLFCs) and RAW264.7 cells. Results: Prior to the experiment. we investigated the security of SYTG by measuring GOT and GPT in serum. 1. SYTG showed high antioxidant activity in a concentration-dependent degree by measured scavenging activity of DPPH free radical, superoxide dismutase and superoxide anion radical. 2. SYTG inhibited IL-1$\beta$, IL-6. TNF-$\alpha$, COX-2 and NOS-II mRNA expression as compared with the control group in a concentration-dependent degree in RAW264.7 cell line. 3. SYTG inhibited IL-1$\beta$, IL-6 production significantly at 100 ${\mu}g/ml$ and TNF-$\alpha$ production significantly at 50, 100 ${\mu}g/ml$ as compared with the control group in RA W264.7 cell line. 4. SYTG inhibited IL-1$\beta$, and IL-6 production significantly as compared with the control group in serum of acute inflammation-induced mice. and decreased IL-1$\beta$, IL-6 production in spleen tissue. and also decreased IL-1$\beta$, IL-6 production in liver tissue. Conclusion: These results suggest that SYTG can be useful in treating diverse female diseases caused by inflammation such as endometrosis, myoma, pelvic congestion. chronic cervicitis, chronic pelvic inflammatory disease and so on.

• BMB Reports
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• 제31권5호
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• pp.492-497
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• 1998

Cu,Zn-superoxide dismutase (SOD) was purified from horseradish by using Mono Q and Superose 12 FPLC column chromatography. The native molecular mass of the purified enzyme was approximately 33 kDa, as determined by gel filtration. The subunit molecular weight, as estimated by SDS-PAGE, was 16 kDa. These results indicated that the native enzyme is a homodimer. We investigated the free radical-generating function of horseradish Cu,Zn-SOD by using a chromogen, 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonate) (ABTS) which reacts with ${\cdot}OH$ radicals to form $ABTS^{+{\cdot}}$ The formation of $ABTS^{+{\cdot}}$ was required for both active Cu, Zn-SOD and $H_2O_2$. The optimal pH for the free radical-generating activity of this enzyme was 6.0-8.0, and it retained about $40^{\circ}C$ of its maximum activity when exposed at $40^{\circ}C$ for 15 min. A neutral scavenger, ethanol, inhibited the $ABTS^{+{\cdot}}$ formation by horseradish Cu, Zn-SOD more effectively than that by the mammalian enzyme. These results suggest that the active channel of horseradish enzyme is slightly larger than that of the mammalian enzyme.

• 동의생리병리학회지
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• 제21권1호
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• pp.165-170
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• 2007

Pyungwi-san(PWS) have been using as a basic prescription of digestive disorder in Korean traditional medicine. This study was performed to examine the in vitro antioxidant activity of the extract using different antioxidant tests including by 1,1-diphenyl-2-picryl-hydrazil (DPPH) radical scavenging, superoxide anion radical scavenging, metal chelating hydrogen peroxide scavenging, lipid peroxydation protective effect and scavenging effect of nitric oxide and peroxynitrite. Herbal-acupuncture solution of PWS(PWS-HS) exhibited a concentration-dependent inhibition of DPPH radical adduct formation and it showed dose-dependent free radical scavenging activity onto superoxide anions. In addition, the result of metal chelating hydrogen peroxide scavenging and ammonium thiocyanate experiments showed that PWS-HS was an active scavenger of hydroxyl radicals. Furthermore, it was also found to be effective in scavenging nitric oxide and peroxynitrite, well-known cytotoxic species that can oxidize several cellular components such as proteins, lipids and DNA.