• 한국자원식물학회지
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• 제21권5호
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• pp.395-401
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• 2008

Flavonoid는 거의 모든 야채와 과일에 함유된 주요한 구성 성분이며 flavonol은 flavonoid 그룹 중 하나로 우리가 식품으로 섭취하는 대표적인 성분으로는 kaempferol과 quercetin이 알려져 있다. kaempferol과 auercetin은 퇴행성질병의 예방에 효과가 있다고 알려져 있어 식품 첨가물로 사용되고 있다. 본 연구의 목적은 항산화제로도 알려진 kaempferol과 quercetin을 이용하여 다양한 농도에서의 소의 폐혈관내피 세포주에 대한 각각의 산화스트레스 보호효과와 두 가지 물질의 동시 처리 시에 나타날 수 있는 상승효과를 밝히기 위함이다. 1 mM의 $H_{2}O_{2}$를 처리하여 산화스트레스를 가한 세포나 가하지 아니한 세포에서나 모두 kaempferol과 quercetin의 처리로 세포의 활성도가 높았다. 그러나 특히 산화스트레스를 가한 세포에서 항산화물의 산화스트레스 극복효과가 현저하게 나타났다. 항산화물의 농도가 고농도의 경우 오히려 증가된 세포활성도가 저하되는 반응을 보여 너무 높은 농도의 처리는 오히려 항산화효과를 억제할 수 있음을 알 수 있었다. 일반적으로 우리가 섭취하는 식품에는 kaempferol과 quercetin이 함께 포함되어 있으므로 이 두 가지 물질을 일정 비율로 서로 섞은 다음 산화스트레스 처리와 함에 처리하여 조사한 결과 단독으로 처리한 결과와 달리 고농도 조건에서도 세포활성도가 아주 높게 나타났다. 이상의 결과에서 항산화물은 생체에서 일어날 수 있는 많은 산화스트레스 상태를 완화시킬 수 있으나 가장 우수한 효능을 나타낼 수 있는 적정 농도의 조사가 중요하며 특히 각각의 항산화물을 단독으로 사용하는 것 보다 함께 사용하는 것이 상승효과를 나타낼 수 있음을 알 수 있었다.

• 한국노년학
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• 제38권4호
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• pp.1107-1125
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• 2018

본 연구는 치매환자와 동거하는 가족의 자살생각 위험요인과 보호요인에 따라 유형화를 하고, 각 유형집단이 자살생각에 미치는 영향을 분석하여 자살예방을 위한 실증적 기초 자료를 제시하는데 목적이 있다. 본 연구는 2013년 지역사회건강조사를 활용하여 치매환자와 동거하고 있는 가족 2,715명의 자료를 분석대상으로 하였고, 잠재계층모형분석과 이항로지스틱분석을 실시하였다. 주요분석내용은 (1) 자살생각의 위험요인과 보호요인의 유형화 (2) 유형화된 집단이 자살생각에 미치는 영향을 규명하고자 한다. 총24개의 자살생각 위험요인과 보호요인의 지표를 활용하여 잠재적 집단분석을 실시하여 '고위험-저보호요인'집단, '고위험-고보호요인'집단, '저위험-고보호요인'집단, '저위험-저보호요인'집단으로 유형화하였다. 분석 결과, '고위험-저보호요인'집단인 경우 자살생각이 가장 높았고, 유의하게 자살생각을 가지는 것으로 나타났다. 결과에 기반한 실천적 함의와 과제를 제시하였다.

• Nutritional Sciences
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• 제6권3호
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• pp.160-166
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• 2003

To examine the evidence that wheat bran is protective against breast cancer development and that its main mechanism of action is by modulating estrogen metabolism. This review explores the role of different experimental factors on the anticancer effects of wheat bran and the relationship of changes to estrogen metabolism by wheat bran on breast cancer risk The timing of the experimental diets in relation to carcinogen administration, the length of feeding of the experimental diets, and the level of dietary fat had an impact on the effectiveness of different doses of wheat bran in reducing breast carcinogenesis. Wheat bran supplementation resulted in significant reductions in human plasma estrogen levels but not in that of animals tested. The change in excretory metabolism of estrogen by wheat bran feeding in animals was not related to any of the tumor indices measured. The protective effect of wheat bran in breast carcinogenesis is greatest at the promotional phase and when supplemented in a high fat diet. Doses of wheat bran in the 9-12% range in diet have been consistently protective. The inconsistency observed with higher doses of wheat bran may be dependent on the animal model used. Although wheat bran's inhibitory effects on tumor growth may involve changes to estrogen metabolism, the fiber and phytochemical components of wheat bran may also act through estrogen-independent mechanisms. For a better understanding of the effect of wheat bran on breast carcinogenesis, studies comparing the effects of different wheat bran components both alone and in combination need to be performed.

• Natural Product Sciences
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• 제19권2호
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• pp.173-178
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• 2013

The protective effect of SAPP, an extract from a novel herbal complex, on acute liver injury was investigated using mouse animal model in this study. The content of total phenol in SAPP was increased at dose dependent manner. Consistent with the content of total phenol, SAPP showed the significant anti-oxidative effects on 1, 1-diphenyl-2-picrylhydrazyl (DPPH) method. Acute liver injury was induced by D-galactosamine (D-GalN) in mouse. Treatment with SAPP significantly reduced the level of alanine transaminase (ALT) and aspartate transaminase (AST) in serum. Histological observation revealed that whereas D-GalN treated mouse showed vacuolization of hepatocytes, sinusoidal dilation and congestion, loss of cell boundaries and ballooning degeneration, loss of architecture and cell necrosis, treatment with SAPP improved D-GalN-induced liver injury. These results suggest that SAPP shows protective effects against D-GalN-induced hepatotoxicity in vivo acute mouse model.

• 대한의생명과학회지
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• 제23권4호
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• pp.339-347
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• 2017

This study was performed to evaluate the cytotoxicity induced by ischemia-like condition (ILC) in cultured neuroglial cells (C6 glioma cells). The protective effect of kaempferol (KAE), flavonoid against the cytotoxicity induced by ILC induction was assessed. In addition, antioxidative effects of KAE were done by colorimetric assays. Cell viability and the antioxidative effects such as DPPH-radical scavenging activity, superoxide dismutase (SOD)-like activity and inhibitory activity of lipid peroxidation (LP) were analyzed. ILC induction decreased cell viability in a dose-dependent manner, and the $XTT_{90}$ value (low cytotoxicity value) and $XTT_{50}$ value (high cytotoxicity value) were determined during ILC induction for 15 and 40 minutes, respectively. The butylated hydroxytoluene (BHT) antioxidant significantly increased cell viability damaged by the ILC-induced cytotoxicity. In the protective effect of KAE on ILC-induced cytotoxicity, KAE protected the ILC-induced cytotoxicity by the significant increase of cell viability, and also it showed DPPH-radical scavenging ability, SOD-like ability and inhibitory ability of LP. From these results, it is suggested that ILC induction showed cytotoxicity in these cultures and the oxidative stress is involved in the ILC-induced cytotoxicity. While, KAE prevented ILC-induced cytotoxicity by antioxidative effects. In conclusion, natural products like KAE may be a putative therapeutic agent for the treatment of disease associated with oxidative stress such as ischemia.

• 대한한방내과학회지
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• 제26권2호
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• pp.409-419
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• 2005

The water extract of Boyanghwanoh-tang has been used for treatment of ischemic vascular disease in oriental medicine. However, little is known about the mechanism by which the water extract of Boyanghwanoh-tang rescues cells from these damages. Therefore, this study was designed to evaluate the protective effects of Boyanghwanoh-tang on zinc-mediated cytotoxicity in H9c2 cardiomyoblast cells. This study demonstrates that, after treatment of H9c2 cells with zinc, there was a decrease in cell viability in a dose dependent manner, and there was a chromatin condensation. Zinc induced the change of cell morphology. In addition, zinc induced mitochondrial dysfunction. Zinc-induced H9c2 cell death was remarkably prevented by the pretreatment of Boyanghwanoh-tang consistently with increase of the peroxoredoxin 1, 2, 3, 5, and 6 expression. Taken together, the results suggest that zinc induced severe cell death in H9c2 cardiomyoblast cells, and that protective effects of Boyanghwanoh-tang against oxidative injuries are achieved through regulation of peroxiredoin expression.

• 한방재활의학과학회지
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• 제27권4호
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• pp.1-9
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• 2017

Objectives Oxidative stress, in which antioxidant proteins and scavenger protection are overwhelmed by reactive oxygen species (ROS) production, is recognized as one of central causes of disuse muscle atrophy. In this study, the hypothesis that oral treatment with Dangguibohyul-tang (Dangguibuxuetang) could attenuate immobilization-induced skeletal muscle atrophy was tested. Methods The hindlimb immobilization was performed with casting tape to keep the left ankle joint in a fully extended position. The Rats in Dangguibohyul-tang treated group (DGBHT) (n=10) were orally administrated Dangguibohyul-tang water extract, and rats of Control group (n=10) were given with saline only. After 2 weeks of immobilization, the morphology of right and left gastrocnemius muscles in both DGBHT and Control groups were assessed by hematoxylin and eosin staining. Results Dangguibohyul-tang water extract represented the significant protective effects against the reductions of the left gastrocnemius muscles weight and average cross section area to compared with Control group. Moreover, the treatment with Dangguibohyul-tang extract significantly enhanced the Cu/Zn-SOD activities in gastrocnemius muscle compared with Control group. Conclusions Thses results suggest that Dangguibohyul-tang has protective effects against immobilization-induced muscle atrophy by increasing the Cu/Zn-SOD activities in gastrocnemius muscle.

• 대한의생명과학회지
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• 제24권4호
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• pp.435-438
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• 2018

Acanthamoeba culbertsoni is the causative agent of granulomatous amoebic encephalitis (GAE), a condition that predominantly occurs in immunocompromised individuals and which is typically fatal. A mannose-binding protein (MBP) among lectins was shown to have strong A. castellanii pathogenic potential when correlated with major virulence proteins. In this study, protective effects were analyzed using the monoclonal antibody to A. culbertsoni MBP by quantification and were also compared with other free-living amoebae. For the amoebial cytotoxicity to the target cell, amoeba trophozoites were incubated with Chinese hamster ovary (CHO) cells. For the protective effects of antibodies, amoebae were pre-incubated with them for 4 h and then added to the target cells. After 24 h, the supernatants were collected and examined for host cell cytotoxicity by measuring lactate dehydrogenase (LDH) release. The cytotoxicity of A. culbertsoni to the CHO cells showed about 87.4%. When the monoclonal antibody was pre-incubated with A. culbertsoni, the amoebial cytotoxicity was remarkably decreased as shown at LDH release (1.858 absorbance), which was represented with about 49.9%. Taken together, it suggested that the monoclonal antibody against MBP be important to inhibit the cytotoxicity of A. culbertsoni trophozoites to the target cell. The antibody will be applied into an in vivo functional analysis, which would help to develop therapeutics.

• 패션비즈니스
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• 제28권2호
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• pp.109-124
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• 2024

The aim of this paper is to design and evaluate calf braces that are equipped with Electrical Muscle Stimulation (EMS) modules. These braces are intended to alleviate calf pain in PARA Taekwondo athletes. The paper also seeks to assess the effects of different textile electrode designs. PARA Taekwondo participants are at a heightened risk of injuries and pain due to the nature of this exercise, which is designed for individuals with disabilities. Additionally, there is a significant risk of strain on the lower limb muscles in PARA Taekwondo compared to regular Taekwondo. To address this issue, calf taping methods are commonly used. In this study, we develop calf EMS protective gear and aim to examine the effects of different textile electrode designs inspired by taping methods. We evaluate the differences in the effects of three different textile electrode designs through visual analog scale (VAS) and range of motion (ROM) measurements. The results show that EMS protective gear has the potential to reduce calf pain among PARA Taekwondo athletes, with electrode designs inspired by kinesiology taping providing the most effective pain relief. This research suggests that these findings may be applicable to other sports disciplines, body areas, and everyday pain relief scenarios.

• 한방안이비인후피부과학회지
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• 제22권3호
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• pp.20-35
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• 2009

Objective : The present study designed this study to investigate anti-oxidative effects of EF on HaCaT keratinocyte. Method : The present study measured the amount of polyphenoics and flavonoids, and also measured the levels of catalase, Ascorbate peroxidase (APX), SOD like activities and DPPH free radical scavenging activity. Then the effects of SB on viability and prolferation rates, and protective effects against oxidative stress induced by chemicals such as hydrogen peroxide and rotenone were also investigated. Results and conclusion : EF showed protective effect against cell death of HaCaT keratinocyte induced by rotenone and SNP significantly. In conclusion, these results suggest that EF may have anti-oxidantic action in human skin and also suggest that EF can be used as anti-aging agent.