• Journal of Microbiology and Biotechnology
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• v.17 no.8
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• pp.1399-1402
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• 2007

The virulence of superoxide dismutase (SOD) mutants of Vibrio vulnificus, as tested by intraperitoneal injection into mice, decreases in the order of sodC mutant, sodA mutant, and sodB mutant lacking CuZnSOD, MnSOD, and FeSOD, respectively. The survival of SOD mutants under superoxide stress also decreases in the same order. The virulence of soxR mutant, which is unable to induce MnSOD in response to superoxide, is similar to that of the sodA mutant, as the survival of the soxR mutant under superoxide stress is similar to that of the sodA mutant. Consistently, the lowered survival of the soxR mutant is complemented not only with soxR but also with sodA. Thus, the virulence of V. vulnificus is significantly affected by the cellular level of SOD activity, and an increase in SOD level through MnSOD induction by SoxR under superoxide stress is essential for virulence.

• Journal of Embryo Transfer
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• v.27 no.2
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• pp.101-105
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• 2012

Linuron is a pesticide with a weak anti-androgenic property, which impacts male reproductive organs. In this study, to clarify whether linuron affects the cellular antioxidant system of ventral prostate, gene expression patterns of the representative antioxidant enzymes such as glutathione peroxidase (GPx), selenoprotein P (SePP), and superoxide dismutase (SOD) were investigated in the rat ventral prostates exposed to linuron using real-time RT-PCR analyses. Sprague-Dawley rats castrated at 6 weeks old were treated with linuron (25, 50, or 100 mg/kg per oral) daily for 10 days after testosterone propionate administration (0.4 mg/kg) subcutaneously. As compared to normal control animals, mRNA levels of phospholipid hydroperoxide GPx (PHGPx), SePP, and Mn SOD significantly increased in the prostates exposed to linuron (25, 50, and 100 mg/kg). However, cytosolic GPx (100 mg/kg) and Cu/Zn SOD (25, 50, and 100 mg/kg) mRNA levels significantly decreased in the ventral prostates. These results indicate that linuron upregulates the expressions of PHGPx, SePP, and Mn SOD mRNAs, but down-regulates the expressions of cytosolic GPx and Cu/Zn SOD in rat prostates, suggesting that linuron may have dual effects in the cellular antioxidant system of prostate.

• Journal of Life Science
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• v.10 no.5
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• pp.504-510
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• 2000

This study was designed to investigate the effects of mulberry (Morus alba L.) leaf extract (MLE) on oxygen radicals and their scavenger enzymes in liver membranes of rats. Sprague-Dawley (SD) male rats (160$\pm$10 g) were fed basic diet (control group), and experimental diets (MLE-100 and MLE-300 groups) added 100 and 300 mg/kg BW/day for 6 weeks. Hydroxyl radical (.OH) levels resulted in a significant decreases (15.2% and 18.1%, 5.6% and 8.0%, respectively) in liver mitochondria and microsomes could be not obtained. These are no significant differences in superoxide radical ($O_2$) levels of liver cytosol in MLE-100 and MLE-300 groups compared with control group. Lipid peroxide (LPO) levels were slightly decreased about 13.6% and 6.1% in liver mitochondria and microsomes of MLE-300 group compared with control group. Oxidized protein (OP) levels were remarkably decreased about 16.9% and 27.2% in liver microsomes only of MLE-100 and MLE-300 group compared with control group. Mn-SOD activities in liver mitochondria were remarkably increased (18.2% and 28.7%, respectively) in MLE-100 and MLE-300 groups, and Cu,Zn-SOD activities in liver cytosol were also significantly increased (11.3% and 20.2%, respectively) in MLE-100 and MLE-300 groups compared with control group. Mn-SOD activities in liver mitochondria were remarkably increased (18.2% and 28.7%, respectively) in MLE-100 and MLE-300 groups, and Cu,Zn-SOD activities in liver cytosol were also significantly increased (11.3% and 20.2%, respectively) in MLE-100 and MLE-300 groups compared with control group, but significant difference between GSHPx activities in liver cytosol could be not obtained. These results suggest that anti-aging effect of mulberry leaf extract (MLE) may play a pivotal role in attenuating a various age-related changes.

• Journal of Ginseng Research
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• v.25 no.4
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• pp.150-155
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• 2001

This study examined effects of the active ingredients from ginseng on paraquat(PQ) toxitity. Mice were given PQ(25mg/kg, ip) and then they were given total saponins (TS; 5mg/kg, orally), protopanaxadiol (PD; 5mg/kg, orally) and protopanaxatriol(PT; 5mg/kg, orally) per day for periods of 1,3 & 7 days. We measured the activities of superoxide dismutase (SOD), electrophoretic isozyme band, catalase (CAT) were compared in the liver of mouse that dose with PQ and/or TS, PD and PT. The activities of SOD, CAT were generally higher in PQ+PD group than others groups. Especially the activity of SOD was the highest in PQ+PD group than others groups. SOD isozyme separated into three bands by electrophoresis. One band was located to near the anode side and two bands were cathode side. As the results of treated with KCN, we were confiremed that the Cu, Zn-SOD was located to near the anode side but the Mn-SOD were cathode side. Our results suggested that an antioxidant effect of ginseng saponins elevated a protection ability to an oxidative damage by direct action of SOD, CAT and reinforced the synthetic ability of endogenous antioxidant material in living organism. Particularly, PD was a effective antioxidant compared with others.

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2003.10a
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• pp.66-70
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• 2003

The first line of antioxidant defense against reactive oxygen species includes the enzymatic activity of the superoxide dismutase (SOD) that catalyzes the disproportionation of superoxide to hydrogen peroxide and water. The SOD mainly removes highly toxic $O_2$$^{[-10]}$ and also prevents $O_2$$^{[-10]}$ mediated reduction of iron and subsequent OH$^{[-10]}$ generation. Along with an interest in SOD as a first line of defense against damage mediated by the superoxide anion, the SOD1 enzyme has been subjected to investigation in the molecular and cellular level. (omitted)

• Proceedings of the Microbiological Society of Korea Conference
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• 2005.05a
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• pp.173-173
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• 2005

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2004.10a
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• pp.33-33
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• 2004

• Proceedings of the Korean Society of Sericultural Science Conference
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• 2004.10a
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• pp.71-71
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• 2004

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2004.10a
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• pp.99-99
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• 2004

• Proceedings of the Korean Society of Plant Biotechnology Conference
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• 2004.10a
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• pp.120-120
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• 2004