• 한국산림과학회지
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• 제101권1호
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• pp.69-76
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• 2012

본 연구에서는 산양삼을 첨가한 고지방식이를 하였을 때 흰쥐 골격근의 지질과산화와 항산화 단백질의 발현 정도를 분석하고자 하였다. 32마리의 웅성 흰쥐를 대상으로 난괴법을 사용하여 HS(고지방식이 대조군), MG1(0.5%의 산양삼 첨가식이 섭취군), MG2(1.0%의 산양삼 첨가식이 섭취군), 그리고 MG3(2.0%의 산양삼 첨가식이 섭취군)으로 각각 8마리씩 분류하였다. 식이는 4주간 섭취시켰다. 혈중 중성지방은 MG1과 MG2가 HS에 비하여 유의하게 낮았으며, 혈중 HDL-C는 MG3이 HS 및 MG2에 비하여 높게 나타났다. 근육 글리코겐 함량은 MG2, MG3이 HS와 MG1에 비하여 높았으며, MDA 함량은 MG1, MG2, MG3이 HS에 비하여 낮은 경향만이 나타났다. 비복근의 GPx 단백질 발현은 MG2가 HS에 비하여 높았으며, Cu,Zn-SOD은 MG1과 MG2가 높게 나타났다. Mn-SOD는 MG1, MG2, MG3이 HS에 비하여 높은 경향만이 나타났다. 이상의 결과, 고지방식이에 산양삼 첨가는 골격근의 MDA 함량을 저하시키고 항산화기능을 증가시키는 중요한 역할을 한다고 할 수 있다.

• 한국식품영양과학회지
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• 제36권12호
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• pp.1497-1502
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• 2007

다시마 첨가 배추김치의 항산화 효과를 고지방식이를 섭취시킨 흰 쥐에서 살펴보았다. 동물실험군은 고지방식이군, 고지방식이에 대조김치, 다시마를 20% 첨가한 김치, 그리고 시판하는 J-김치를 첨가한 4군으로 실험군 당 동물은 10마리였으며 사육기간은 8주였다. 지방은 총에너지의 40%를 지방을 첨가하였으며 김치는 동결 건조하여 10% 첨가하였다. 김치의 DPPH 소거 효과는 김치군에서 유의적으로 높았으며 김치군 중 다시마 첨가 김치의 효과가 각 실험 농도에서 유의적으로 높았다(p<0.05). 간의 지질과산화는 김치식이에 의해 유의적으로 감소되었고, 김치군 중 다시마 첨가 김치의 TBARS 농도는 유의적으로 낮았다(p<0.05). 간의 항산화 효소 활성을 살펴보았을 때 김치 섭취군의 $Cu{\cdot}Zn$-SOD, Mn-SOD, 그리고 catalase의 활성은 고지방식이군에 비해 유의적으로 낮았으며(p<0.05) 다시마 첨가 김치군의 효소 활성은 다른 김치군에 비해 유의적으로 낮았다(p<0.05). 이는 고지방식이에 의해 생성된 지질과산화물질이 김치에 존재하는 항산화물질에 의해 제거되어 이를 방어할 항산화 효소활성이 고지방식이군에 비해 낮게 나타난 것으로 생각된다. 본 연구에서는 다시마 첨가 김치의 항산화 효과가 김치군 중 가장 높은 것으로 나타나 김치의 항산화 효과가 다시마의 활성 성분에 의해 더욱 증진된 것으로 확인되었다.

• BMB Reports
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• 제32권6호
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• pp.585-593
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• 1999

The water and methanol extracts of Artemisia argyi showed significant cytotoxicities against J774A.1 cells but not so much against normal leukocytes. The cytotoxicities were found to be dependent on the extract concentration and the incubation time. The concentration of water and methanol extracts inhibiting 50% of cell proliferation ($IC_{50}$) were estimated to be 44.2 mg/ml and 71.6 mg/ml, respectively. In the presence of Artemisia argyi water extract, total superoxide dismutase (CuZnSOD and MnSOD) activities of media, cytoplasmic and mitochondrial fractions of J774A.1 cells increased in accordance with cytotoxicity. MnSOD was found to be the main component of enhanced total SOD activities, particulary in the mitochondrial fraction. In contrast to SOD, catalase and glutathione peroxidase (GPx) were not found in any instance of the current investigation. In addition, substantial amount of $O_2^-$ appeared to be generated in the mitochondrial fraction under the influence of Artemisia argyi. All data put together, it is postulated that Artemisia argyi extracts seem to stimulate $O_2^-$ generation in mitochondria of J774A.1 cells with concomitant increases of SODs. Since $H_2O_2$, the reaction product of SOD on $O_2^-$, is known to be readily converted to very toxic $OH{\cdot}$ in the absence of catalase and/or GPx cooperation, toxicity derived from ROS such as $O_2^-$, $H_2O_2$, and $OH{\cdot}$ may be the main cause of necrosis and/or apoptosis of J774A.1 cells.

• Journal of Microbiology
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• 제41권1호
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• pp.28-33
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• 2003

Pycnogenol (PYC) is believed to have potential as a therapeutic agent against free radical-mediated oxidative stress. It is important, therefore, to understand the interactions between PYC and cellular defenses against oxidative stress. Toward this end, we analyzed the survival rates on the gene expression responses of E. coli sod katG mutants to PYC after pre-treatment of PQ or H$_2$O$_2$-mediated stress under aerobic conditions. We identified SOD induced by PYC, but not HP1 in sod hate mutants. A striking result was the PYC induction of SOD with antioxidant property in single katG mutant cells, particularly MnSOD and CuZnSOD. These inductions were further increased with oxidative stress, while HP1 was not induced in these conditions. The effects of pycnogenol treatment on these cells depend in part on its concentration on the stress response. Protective effects of PYC exposure which affected gene expression in cells were consistent with cell survival rates. Our results demonstrate that pycnogenol may alter the stress response gene expression in a specific manner such as SOXRS because PYC induction of single mutant only worked under increased PQ stress. All together our data indicate that SOD activity is essential for the cellular defense against PQ-mediated oxidative stress, suggesting that PYC may not be effective as an antioxidant in only oxidative stress conditions. On the other hand, it was expected that PYC may play a role as a pro-oxidant and if it is available for use, it should be evaluated carefully.

• 고려인삼학회:학술대회논문집
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• 고려인삼학회 1998년도 Advances in Ginseng Research - Proceedings of the 7th International Symposium on Ginseng -
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• pp.63-70
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• 1998

Superoxide dismutase (SOD) and catalase constitute the first coordinated unit of defense against reactive oxygen species. Here, we examined the effect of ginseng saponins on the induction of SOD and catalase gene expression. To explore this possibility, the upstream regulatory promoter region of Cu/Zn superoxide dismutase (SODI) and catalase genes were linked to the chloramphenicol acetyl-transferase (CATI structural gene and introduced into human hepatoma HepG2 cells. Total saponin and panaxatriol did not activate the transcription of SODI and catalase genes but panaxadiol increased the transcription of these genes about 2-3 fold. Among the Panaxadiol ginsenosides, the Rb2 subtraction appeared to is a major induce of SODI and catalase genes. Using the deletion analyses and mobility shift assays, we showed that the 5051 gene was greatly activated by ginsenoside Rba through transcription factor AP2 binding sites and its induction. We also examined the effect of the content ratio of panaxadiol extracted from various compartment of ginseng on the transcription of 5031 gene. Saponin extract that contains 2.6-fold more PD than PT from the fine root Increased the SODI induction about 3-fold. These results suggest that the panaxadiol fraction and its ginsenosides could induce the antioxidant enzymes, which are important for maintaining cell viability by lowering level of oxygen radical generated from intracellular metabolism.

• Food Science and Biotechnology
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• 제16권3호
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• pp.489-492
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• 2007

We investigated the antioxidant activity of ethanol extracts obtained from the flowers of Elsholtzia splendens on Chinese hamster ovary CHO-K1 cells. When cells were treated with E. splendens extracts (ESEs), low concentrations (<12.5 ug/mL) of stimulated cell proliferation via radical generation. Relative mRNA expression of Cu/Zn-superoxide dismutase (SOD) and Mn-SOD in cells exposed to ESEs (1-20 ug/mL) was significantly induced in a dose-dependent manner (p<0.05). In the case of catalase, ESEs had opposing effects; that is, a low-level treatment caused a decrease, and a high-level treatment induced elevated levels (p<0.05). The results demonstrated that components of ESEs exhibit potential antioxidant properties. Also, further studies are required to clarify the active components of Elsholtzia splendens extracts responsible for such biological activities.

• 한국잠사곤충학회지
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• 제42권2호
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• pp.93-98
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• 2000

This study was designed to investigate the effect of silkworm powder on oxygen radicals and their scavenger enzymes in brain membrances of SD rats. Hydroxyl radical (OH) levels resulted in a considerable decreases in brain mitochondria fraction. Superoxide radical (O$_2$) levels were a slightly decreased in brain cytosol fraction. Lipid peroxide (LPO) and Oxidized protein (OP) levels were significantly decreased in brain mitochondria and microsomes fraction. Mn-superoxide dismutase (SOD) activity was remarkably increased in the mitochondria fraction. Cu and Zn-SOD activities were effectively increased in brain cytosol fraction. GSHPx activity was considerably increased in brain cytosol fraction. These results suggest that anti-aging effect of silkworm plays an effective role in attenuating an oxidative stress and increasing a scravenger enzyme activity in brain membranes.

• BMB Reports
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• 제38권1호
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• pp.111-114
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• 2005

Heat shock proteins (HSPs) are known to protect cells from oxidative stress and other types of injuries. We previously reported the neuroprotective effect of HSP70 following cerebral ischemia and reperfusion using hsp 70.1 knockout (KO) mice. However, the precise role of HSP70 in neuroprotection has not been established yet. The purpose of this study was to investigate the relationship between HSP70 and antioxidant enzymes using hsp 70.1 KO mice. The activities of both SOD-1 and SOD-2 were significantly decreased in hsp 70.1 KO mice than in the wild type (WT) littermates. SOD-1 protein level in the hsp 70.1 KO mice was lower than that of WT. We speculate that HSP70 might be involved in regulation of expression of SOD-1 at the level of transcription or by post-transcriptional modification.

• The Korean Journal of Physiology and Pharmacology
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• 제7권3호
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• pp.163-168
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• 2003

The reactive oxygen species (ROS) are considered to be an important mediator in pancreatic ${\beta}$ cell destruction, thereby triggering the development of insulin-dependent diabetes mellitus. In the present study, HIV-1 Tat-mediated transduction of Cu,Zn-superoxide dismutase (SOD) was investigated to evaluate its protective potential against streptozotocin (STZ)-induced cytotoxicity in insulin-producing MIN6N cells. Tat-SOD fusion protein was successfully delivered into MIN6N cells in a dose-dependent manner and the transduced fusion protein was enzymatically active for 48 h. The STZ induced-cell destruction, superoxide anion radical production, and DNA fragmentation of MIN6N cells were significantly decreased in the cells pretreated with Tat-SOD for 1 h. Furthermore, the transduction of Tat-SOD increased Bcl-2 and heat shock protein 70 (hsp70) expressions in cells exposed to STZ, which might be partly responsible for the effect of Tat-SOD. These results suggest that an increased of free radical scavenging activity by transduction of Tat-SOD enhanced the tolerance of the cell against oxidative stress in STZ-treated MIN6N cells. Therefore, this Tat-SOD transduction technique may provide a new strategy to protect the pancreatic ${\beta}$ cell destruction in ROS-mediated diabetes.

• 동의생리병리학회지
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• 제25권3호
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• pp.451-458
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• 2011

The medicinal mushroom Inonotus obliquus is a traditional and widely used multi-functional fungus. In this study, we have investigated whether Inonotus obliquus (Chaga mushroom) extracts exerts anti-oxidant effects on cisplatin-induced cytotoxicity in auditory cell line, HEI-OC1 cells. First of all, Chaga extracts has no harmful effects on viability of HEI-OC1 cells in the dose range of $65{\sim}125{\mu}g/m{\ell}$. Moreover, it shows cyto-protective effects on the cells treated with cisplatin-induced cytotoxicity in HEI-OC1 cells and the damage of hair cells arrays of the rat primary organ of Corti explants in the presence of cisplatin. Pretreatment with Chaga extracts inhibited the cell death, reactive oxygen species generation (ROS), lipid peroxidation induced by cisplatin. These effects were associated with the induction of antioxidant enzyme by Chaga extracts. We further investigated the effects of Chaga extracts on expression of antioxidant enzymes such as Cu, Zn superoxide dismutase (SOD 1) and Mn SOD (SOD 2) by RT-PCR. In addition, Chaga extracts shows SOD activity and SOD protein expression in cisplatin treated group induced similar to control group. Taken together, these results indicate that Chaga extracts can prevent cisplatin-induced cytotoxicity by radical-scavenging activity (SOD activity) in HEI-OC1 cells. It might be an effective as antioxidant and further studies on the chemo-preventive mechanisms of Inonotus obliquus are needed.