• 약학회지
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• 제39권5호
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• pp.528-534
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• 1995

This investigation was aimed at the study of the antidiabetic activity and effect on hepatic glutathione metabolism of polysaccharide from Trichosanthes kirilowii in hyperglycemic rats with aboxan (175 mg/Kg, i.p.). As the results, the polysaccharide inhibited the increase of blood glucose, triglyceride level and lactate dehydrogenase activity, but cholesterol not changed. And it increased protein bound-SH, nonprotein bound-SH, glutathione level and inhibited the decrease of glutathione S-transferase.

• 한국식품영양학회지
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• 제26권1호
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• pp.8-14
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• 2013

This study was performed to investigate the effects of ethanolic extract of Ulmus davidiana root (UE) on lipid metabolism in mice fed a high-fat diet (HF) for 7 weeks. Forty male ICR mice were randomly divided into four groups; normal diet group (N), high-fat diet group (HF), HF with 0.5% UE (HF-L) and 1% UE (HF-H) group. Body weight, body weight gain, and liver weight in the HF group was significantly higher than in the N group, while those of the HF-L and HF-H group were unchanged. UE improved HF-induced dyslipidemia by reducing serum triglyceride, total cholesterol, and the atherogenic index. There was no difference in serum HDL-cholesterol among experimental groups. However, the HDL-cholesterol/total cholesterol ratio was significantly increased in the HF-L and HF-H group. Histological analysis showed that HF-fed mice developed hepatocellular microvesicular vacuolation as a result of fat accumulation. These changes were attenuated by 1% UE supplementation. In addition, hepatic triglyceride and cholesterol levels in the HF-H group significantly reduced. Taken together, these results demonstrated that lipid levels in the blood and liver were reduced by UE, suggesting that it might be beneficial for the prevention and treatment of hyperlipidemia and fatty liver.

• 한국임상약학회지
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• 제14권1호
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• pp.32-35
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• 2004

The purpose of this study was to investigate the pharmacokinetic changes of verapamil in rabbits with hepatic disorder induced by carbon tetrachloride. The plasma concentrations of verapamil were increased significantly (p<0.05, in slight group; P<0.01, in moderate and severe group) in all groups of hepatic disorder compared to the control group. Morover, the $C_{max}\;in\;slight\;(77.9\%$ increase), moderate ($110\%$ increase), and severe ($174\%$ increase) hepatic disorder groups were significantly (p<0.05, in slight; p<0.01, in moderate and severe) higher than that in control rabbits. These resulted in significantly (p<0.05, in slight; p<0.01, in moderate and severe) greater area under the plasma concentration-time curve (AUC) in moderate ($49.8\%$ increase), moderate ($95.0\%$ increase), and severe ($144\%$ increase) hepatic disorder groups than that in control rabbits. Hence, the relative bioavailability values were 149, 195, and $244\%$ for slight, moderate, and severe hepatic disorder groups, respectively. This could be due to decrease in metabolism of verapamil in the liver because of suppressed hepatic function in the hepatic disorder groups because verapamil is mainly metabolized in the liver.

• Preventive Nutrition and Food Science
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• 제3권1호
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• pp.62-66
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• 1998

The effect of dietary capsaicin (8-methyl-N-vanillyl-6-nonenamide, CAP) on drug-metabolizing enzyme activities was investigated in mice. Male ICR mice were divided into 4 groups and fed diets containing 0, 5, 20, 100 ppm CAP for 4 seeks. Hepatic drug-metabolizing enzyme activities and serum alanine aminotransferase and aspartate transaminease activities were measured. There was no difference in hepatic alanine aminotransferse and aspartate transaminase activities among the groups. Hepatic microsomal cytochrome P450 in CAP fed groups, but p-nitrophenol hydroxylase and the cytosolic acitivity of glutathione S-transferase activities were decreased in the dietary CAP supplemetned groups compared to the control. These results suggest that the dietary CAP at a low dose differentially modulates drug-metabolizing enzyme acitvities without causing hepatic toxicity.

• Applied Biological Chemistry
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• 제51권3호
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• pp.200-206
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• 2008

본 연구는 쌀 배아를 활용한 만성 대사성질환 예방용 제품 및 건강기능성 식품 개발의 일환으로써 고콜레스테롤 식이를 급여하여 고지혈증을 유발시킨 흰쥐에서 15%의 배아와 25%의 흑미 미강색소 배아젤리의 첨가가 혈장과 간 조직의 지질 대사와 항산화효소의 환성에 미치는 영향을 살펴보았다. 실험 식이를 6주 간 급여한 결과, 배아와 흑미 미강색소 배아젤리 첨가는 실험동물의 식이섭취에 영향을 미치지 않았다. 배아군과 흑미 미강색소 배아젤리군은 고콜레스테롤 급여 대조군에 비해 혈장의 총 콜레스테롤과 LDL-콜레스테롤 및 간의 중성지방과 총 콜레스테롤 농도를 감소시키고, HDL-콜레스테롤 농도와 HDL-C/TC 비는 증가시켰으며, 동맥경화지수는 감소시켜 체내 지질대사의 개선 효과가 있었다. 혈장 GOT와 GPT 수치는 배아와 흑미 미강색소 배아젤리를 첨가하였을 때 감소하여 고콜레스테롤혈증 상태에서 간 기능 보호에 긍정적인 효과가 있었다. 또한 배아와 흑미 미강색소 배아젤리는 고콜레스테롤 급여로 인해 증가된 혈장과 간 내의 지질과산화를 억제시키는 효과가 있었다. 반면, 항산화 효소인 간 조직의 SOD와 CAT활성은 배아와 배아젤리 첨가에 따라 증가하였다. 이상의 결과로 볼 때 배아와 흑미 미강색소 배아젤리는 고콜레스테롤 식이 흰쥐의 간 조직에서의 항산화 활성을 강화시키고 산화적 손상을 억제시키는 자용이 있으며 현장과 간조직의 지질대사를 개선하여 심혈관계 질환을 예방 및 감소시킬 수 있을 것으로 사료된다.

• 한국식품과학회지
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• 제41권2호
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• pp.191-195
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• 2009

본 연구는 새송이 버섯을 첨가하여 만든 어묵이 체내 지질 대사와 효소 활성에 미치는 영향을 알아보고자 수컷 Sprague-Dawley 흰쥐 30마리를 대상으로 고콜레스테롤(1%)첨가 기본식이, 30% 일반어묵 첨가 식이와 40% 새송이 버섯 첨가 오징어 어묵 식이를 급여하였다. 평균 식이 섭취량은 대조군, 일반 어묵군, 새송이 버섯 첨가 오징어 어묵군에 따른 각 군 간의 유의적인 차이는 볼 수 없었다. 체중 증가량과 식이효율은 대조군에 비해 실험군 모두 유의적으로 감소하는 경향을 보였다. 혈장 중성지질과 총 콜레스테롤, 동맥경화지수(A.I), GOT, GPT 수준은 대조군이 새송이 버섯 첨가 오징어 어묵군에 비해 유의적으로 높게 나타났다. HDL-콜레스테롤의 경우 새송이 버섯 첨가 오징어 어묵군이 대조군과 일반 어묵군보다 낮게 나타났고, 간조직의 콜레스테롤 및 중성 지방 농도는 유의적으로 차이가 없는 것으로 나타났다. 혈장과 간조직 TBARS 수준은 대조군보다 새송이 버섯 첨가 오징어 어묵군에서 유의적으로 낮은 수치를 보였다. 항산화 효소 활성도에서 SOD활성도는 대조군과 일반 어묵과의 유의적인 차이가 없었으며, CAT활성도는 대조군보다 새송이 버섯 첨가 어묵이 유의적으로 높게 나타났으며. GPx활성도 역시 유의적으로 높게 나타났다. 이 결과들을 종합해 보면, 고콜레스테롤혈증 흰쥐에서의 새송이 버섯 첨가 오징어 어묵은 전반적인 지질대사 개선과 함께 SOD, CAT, GPx와 같은 항산화 효소의 활성을 증가시켜 항산화 방어계에도 긍정적인 효과를 나타냄으로써 앞으로 고콜레스테롤 혈증 예방 등의 혈관 순환기 계통 질병을 예방하기 위한 식품으로써의 활용이 기대된다.

• Journal of Nutrition and Health
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• 제55권1호
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• pp.36-46
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• 2022

Quercetin의 지질대사 개선 효과에 대한 작용기전을 확인하기 위해 C57BL/6J mouse를 사용하여 실험을 수행하였다. 고콜레스테롤혈증을 유도하기 위해 6주간 1% 콜레스테롤과 0.5% cholic acid를 함유하는 고콜레스테롤 식이를 급여하였으며, quercetin은 0.05%와 0.1%의 수준으로 고콜레스테롤 식이에 추가하여 같은 기간 동안 제공하였다. Quercetin은 혈청과 간의 중성지방 및 콜레스테롤 수준을 용량 의존적으로 감소하는 것으로 나타났다. 고콜레스테롤 식이를 섭취한 쥐의 간에서 지방 합성을 촉진하는 SREBP-1c, ACC1 및 FAS 유전자 발현이 quercetin 섭취에 의해 억제되는 것을 확인하였다. Quercetin은 간세포 내에서 에너지 대사를 조절하는 AMPK 활성을 증가시켰다. 이에 반해 암세포 증식을 촉진하고 지방간에서 높게 발현되는 miR-21 발현은 quercetin 섭취에 의해 감소되었다. 본 연구의 결과는 quercetin이 고콜레스테롤 식이 섭취 쥐에서 혈청과 간의 지질 수준을 낮추는 지질대사 개선 효과가 있으며, 이러한 효과의 일부는 간 내 지방합성 유전자 (SREBP-1c, ACC1 및 FAS) 발현, AMPK 활성 및 miR-21 조절을 통해 매개된다는 것을 시사한다.

• Molecules and Cells
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• 제47권2호
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• pp.100010.1-100010.12
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• 2024

Recently, the incidence of metabolic dysfunction-associated steatotic liver disease (MASLD) is increasing due to the high prevalence of metabolic conditions, such as obesity and type 2 diabetes mellitus. Steatotic liver is a hotspot for cancer metastasis in MASLD. Altered lipid metabolism, a hallmark of MASLD, remodels the tissue microenvironment, making it conducive to the growth of metastatic liver cancer. Tumors exacerbate the dysregulation of hepatic metabolism by releasing extracellular vesicles and particles into the liver. Altered lipid metabolism influences the proliferation, differentiation, and functions of immune cells, contributing to the formation of an immunosuppressive and metastasis-prone liver microenvironment in MASLD. This review discusses the mechanisms by which the steatotic liver promotes liver metastasis progression, focusing on its role in fostering an immunosuppressive microenvironment in MASLD. Furthermore, this review highlights lipid metabolism manipulation strategies for the therapeutic management of metastatic liver cancer.

• Journal of Nutrition and Health
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• 제27권5호
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• pp.442-450
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• 1994

The purpose of this study was to determine the effects of 2-AAF injection time on hepatic lipid peroxide metabolism and cytochrome P450 content in Sprague-Dawley rats fed diets containing high amounts of vegetable oils or animal fats(15%, w/w). Fifty mg of 2-AAF/kg of body weight/day was injected in PEG 300 intraperitonially for 3 consecutive days after 4 or 8 weeks to rats fed corn oil(CO) or lard(LA) diet. The contents of lipid peroxide and cytochrome P450, and the activities of superoxide dismutase(SOD), glutathione peroxidase(GSH-peroxidase) and glutathione S-transferase(GSH-S-transferase) were determined in hepatic microsomal or cytosolic fraction. Microsomal thiobarbituric acid reactive substances(TBARS) and cytochrome P450 contents increased in Co group injected 2-AAF after 4weeks. Cytosolic SOD activity increased in CO group injected 2-AAF after 4 weeks and in LA group injected 2-AAF after 4 or 8 weeks. Cytosolic GSH-S-transferase activity increased in LA group compared to CO group without 2-AAF injection. GSH-S-transferase activity increased in CO group injected 2-AAF after 4 or 8 weeks and in LA group injected 2-AAF after 4 weeks. Therefore, it may be suggested that 2-AAF injection increase the contents of lipid peroxide or cytochrome P450, and detoxifying enzyme activities in rats fed CO diet for short period and in rats fed LA diet for longer period.

• Toxicological Research
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• 제11권2호
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• pp.267-271
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• 1995

A single large dose of ethanol as well as chronic ethanol consumption produces alcoholic fatty liver in human and experimental animals. We examined the effects of YH439, a potential hepatoprotective agent, on alcoholic fatty liver generation in adult female rats. In rats treated with YH439 (250 mg/kg, po) 4 hr prior to a single dose of ethanol (6 g/kg, po), a significant decrease in hepatic triglyceride accumulation was observed. YH439 also has an inhibitory effect on hepatic triglyceride and cholesterol accumulation induced by repeated ethanol treatments for one week. Because it has been known that induction of alcoholic fatty liver is associated with lipid peroxidation and/or hepatic glutathione depression, the effect of YH439 on these parameters was determined in the livers of rats treated with ethanol. Coadministration with YH439 inhibited MDA formation and gIutathione depression induced by acute or repeated ethanol administration. In order to determine the effect of YH439 on ethanol metabolism in vivo, disappearance of ethanol from blood was measured. In rats treated with a single dose of ethanol (6 g/kg, po), the ethanol concentration in blood reached a peak approximately 120 min following the treatment which declined linearly for 18 hrs. YH439 had no effect on the decline of blood ethanol concentration regardless of the dose of ethanol given to rats. These results in this study suggest that YH439 has an inhibitory effect on fatty liver generation induced by acute or repeated ethanol consumption through a mechanism not directly related to the rate of ethanol metabolism in vivo.