• Nutrition Research and Practice
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• 제9권5호
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• pp.489-495
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• 2015

BACKGROUND/OBJECTIVES: The present study was conducted to investigate the effects of dried Momordica charantia aqueous extracts (MCA) and ethanol extracts (MCE) on obesity and lipid profiles in mice fed a high-fat diet. MATERIALS/METHODS: Forty two ICR mice were randomly divided into six groups. The normal group was fed a basal diet, and other groups were fed a 45% high-fat diet (HFD) for 7 weeks. The normal and HFD groups were also orally administered distilled water each day for 7 weeks. The remaining groups received Momordica charantia extract (0.5 or 1.0 g/kg/day MCA, and 0.5 or 1.0 g/kg/day MCE). In order to measure the anti-obesity and lipid profile improvement effects, body and visceral tissue weight, lipid profiles, plasma insulin levels, hepatic malondialdehyde (MDA) levels and superoxide dismutase (SOD) activity were measured. RESULTS: Both MCA and MCE significantly decreased body and visceral tissue weight relative to those of the HFD group (P < 0.05). Additionally high doses of MCE and MCA significantly reduced the plasmatic insulin levels compared to the HFD groups (P < 0.05) to concentrations comparable to those found in the normal group. MCA and MCE supplementation also significantly modulated the lipid profiles in plasma, liver, and feces compared to mice fed the HFD (P < 0.05). Furthermore MCA and MCE significantly increased hepatic SOD activity, and reduced MDA generation in the liver of the HFD mice (P < 0.05). CONCLUSIONS: Results from the present study suggest that Momordica charantia extracts have anti-obesity effects and the ability to modulate lipid prolife of mice fed a HFD by suppressing body weight gain, visceral tissue weight, plasma and hepatic lipid concentrations, and lipid peroxidation along with increasing lipid metabolism.

• 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.

• Food Science and Biotechnology
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• 제17권3호
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• pp.457-463
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• 2008

The effects of dietary supplementation of the unrefined rice bran oil from 'Suwon 415' pigmented black rice (BRBO) on cholesterol metabolism and cellular antioxidant status were investigated in hypercholesterolemic rats. The significant reduction of total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) concentrations was observed in the plasma of rats fed BRBO. BRBO also decreased plasma and hepatic oxidative stress as a result of increased levels of hepatic thiobarbituric acid reactive substances (TBARS) levels associated with the elevations of hepatic superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) activities together with increased plasma level of tocopherol. This study indicates that dietary BRBO supplement can leads to the improvement of overall cholesterol metabolism and antioxidant status even more effectively than 'Chuchung' white rice (WRBO). Consumption of BRBO may also protect the liver from oxidative damage caused by lipid peroxidation.

• The Korean Journal of Physiology and Pharmacology
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• 제1권2호
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• pp.221-224
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• 1997

Effects of melatonin on hepatic glutathione-peroxidase (GSH-Px) and glutathione-reductase (GSH-reductase) activities were studied in Sprague-Dawley (SD) rats administered i.p. (10 mg/kg body weight) with melatonin during 15 days. The activity of cytosolic GSH-reductase in the liver was not changed by melatonin. However, melatonin injection increased significantly the activity of liver cytosolic GSH-Px activity compared with those in saline-treated rats. At the same time, plasma GSH-Px was also increased significantly in melatonin-treated rats. Since GSH-Px, a major antioxidative enzyme, removes $H_2O_2$ and lipid peroxides which are formed during lipid peroxidation from cellular membrane, such elevation of heptatic GSH-Px activity may contribute to the improvement of antioxidative effects under oxidative damage in the liver.

• 한국가금학회지
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• 제45권2호
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• pp.109-118
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• 2018

현대양계산업은 육종, 영양, 관리기술의 향상에 힘입어 산란계의 생산성과 육계의 성장성이 크게 향상되었다. 이러한 닭의 생산성 향상을 뒷받침해 주기 위해서는 이들의 대사적 요구를 충족시킬 수 있는 건강한 간의 기능이 필요하다. 가금에서 지방산의 대부분은 간에서 생합성되며, 이는 간의 지방대사가 닭의 생육 및 산란능력 등에 매우 중요하다는 것을 의미한다. 간에서의 지방합성이 지방의 대사능력과 분비를 초과하게 되면 중성지방은 간에 축적되어 지방간(fatty liver)을 유발하기도 한다. 산란계의 경우 산란을 시작하게 되면 혈액 내 유리지방산, 지질 및 인지질 등이 급격히 증가한다. 산란계에서 산란율이 높은 닭은 난황합성이 활발하게 일어나기 때문에 지방간을 가지는 경우가 많으며, 심한 경우 간의 손상(liver-hemorrhage)에 의해 폐사로 이어질 수 있다. 따라서 닭의 간에서 지방합성과 합성된 지방의 분비와 이용은 건강한 닭의 성장과 생산성 향상에 주요한 열쇠로 판단되어 최근까지 연구된 닭의 지방대사와 지방간 억제 혹은 예방 등에 대하여 기술하였다.

• Journal of Nutrition and Health
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• 제39권2호
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• pp.91-99
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• 2006

This study was conducted to investigate the effects of mulberry fruit, mulberry leaves and silkworm powder with different mixing ratios on hepatic antioxidative system and lipid metabolism in streptozotocin-induced diabetic rats. Sprague-Dawley male rats weighing $100{\pm}10g$ were induced diabetic by 50 mg/kg bw streptozotocin and randomly assigned to following experimental groups; normal diet group (DM), 0.3% and 0.6% mulberry fruit diet groups (F and 2F), 0.3% mulberry leaves diet group (M), 0.3% silkworm powder diet group (S), 0.15% mulberry fruit+0.15% mulberry leaves diet group (FM), 0.15% mulberry fruit+0.15% silkworm powder diet group (FS), 0.1 % mulberry fruit+0.1 % mulberry leaves+0.1% silkworm powder diet group (FMS). The experimental diets were fed for 4 weeks. Hepatic SOD activity was not changed significantly by any of single or combined supplementations of mulberry fruit, leaves and silkworm powder but GSH-px and catalase activities were increased by the groups supplemented with two or three of the test ingredients (FM, FS, FMS) as compared with the DM group. Hepatic TBARS value was not reduced significantly by any of the supplementations but lipofuscin contents were significantly reduced in the FM, FS and FMS groups as compared with the DM group. Hepatic mitochondria and microsomal carbonyl values were reduced by the single and combined supplementations of the test ingredients. Hepatic HMG-CoA reductase activities were increased in the all supplementation groups as compared with the DM group. Hepatic total lipid and triglyceride contents were increased but cholesterol contents reduced in the supplemented groups. The effects on the enzyme activities, peroxide or its products and lipid contents were most remarkable in the FMS group. In conclusion, mulberry fruit, mulberry leaves and silkworm powder have the favorable effects on antioxidative system and lipid metabolism in the diabetic liver and the mulberry fruit, leaves and silkworm powder with equal ratio exert the synergistic effect expectedly to prevent diabetic complications.

• Journal of Nutrition and Health
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• 제36권7호
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• pp.667-674
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• 2003

The study was performed to investigate the effects of isoflavone and/or grape seed oil supplementation on serum and liver lipid profiles and bone strength in ovariectomized female rats. Female Spraque-Dawley rats were assigned into 4 groups of ovariectomized (O), isoflavone (0.085 mg/100 g b.w/day) in ovariectomized rats, grape seed oil in ovariectomized rats and isoflavone and/or grape seed oil in ovariectomized rats. After 8 weeks, biochemical profiles of serum, liver and bone were analyzed. Total food intakes, body weight gains and FER (food efficiency ratio) were not statistically significantly different among groups. Total cholesterol, triglyceride and LDL-cholesterol levels in serum were decreased by fed of isoflavone and/or grape seed oils. However, crude lipid and total cholesterol contents in liver were not affect of isoflavone and/or grape seed oil. The hepatic glutathione contents were increased by isoflavone and/or grape seed oil fed. The hepatic glutathione-S-transferase activity in isoflavone and/or grape seed oil supplemented groups were higher than that O group. Bone (scapular and femur bone) dry weight, femur of max weight and bending strength were no significant difference among groups. Our finding suggest that isoflavone/grape seed oils might have potential role for serum lipid profiles improvement and bone strength in vivo.

• 한국동물위생학회지
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• 제42권2호
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• pp.43-51
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• 2019

The effects on the radical scavenging activities and hepatic lipid levels in rats fed a high-fat diet (HFD) in the 70% ethanolic extract from Acer tegmentosum Maxim (ATM) were evaluated. Total phenol content of ATM was 168.60 mg catechin/g in the 70% ethanolic extract of Acer tegmentosum. The DPPH and ABTS radical scavenging activities were 18.32 mM TE/g and 32.25 mM TE/g, respectively. Food efficiency ratio was lower significantly in supplemented group with 150 mg/kg BW/day during 5 weeks (HFD+ATM) compared to HFD. Total cholesterol and triglyceride contents in liver tissue of HFD+ATM were lower significantly compared to those of the HFD. Supplementation of ATM significantly decreased lipid peroxide contents and increased radical scavenging activity in the liver tissue compared with that of HFD group. Moreover, the hepatocytes of HFD rats showed a typical fatty liver morphology showing the presence of cytoplasmic lipid droplets, whereas administration of ATM attenuated the number and the size of lipid droplets. In the liver tissue of ATM administrated HFD group, the mRNA levels of SREBP-1c, $PPAR{\gamma}$, and FAS were decreased. Therefore, these results suggest that Acer tegmentosum extracts could have antioxidant activities and the hypolipidemic effects in liver tissue by its phenolic compounds.

• 한국환경과학회지
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• 제22권3호
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• pp.341-346
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• 2013

The purpose of this study was to assess the effects of Cordyceps militaris extract supplementation on the improvement of blood glucose, lipid compositions and hepatic functional enzyme activities in the serum of streptozotocin(STZ, 50 mg/kg BW, IP injection)-induced diabetic rats fed the experimental diets for 5 weeks. The concentrations of blood glucose and lipid compositions(total cholesterol, ${\beta}$-lipoprotein, free cholesterol, cholesteryl ester, triglyceride and phospholipid) and atherosclerotic index in serum were significantly lower in the DM+CM group than in the DM group, whereas the ratio of HDL-cholesterol concentration to total cholesterol in the DM+CM group were higher than in the DM group. The activities of hepatic functional enzymes(aminotransferase, LDH and ALP) in serum were lower in the Cordyceps militaris extract administration group(group DM+CM) than in the hyperglycemic DM group. The results shown above suggested that Cordyceps militaris extract supplementation effectively improves blood glucose and atherosclerosis in the serum of diabetic rats.

• 한국동물위생학회지
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• 제38권2호
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• pp.117-125
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• 2015

This study was investigated the effects on the radical scavenging activities and hepatic lipid levels in rats fed a high-fat diet (HFD) by the 70% ethanolic extract from Rubus coreanus. The Rubus coreanus extract (RCE) was administered through the gastrointestinal tract at 150 mg/kg BW/day for 5 weeks (HFD+RCE). Total phenol content was 157.93 mg gallic acid/g in the RCE. Scavenging activities to DPPH, ABTS, an d hydroxyl radicals by RCE significantly increased in a does-dependent manner of $50{\sim}500{\mu}g/mL$ concentration. DPPH and ABTS radical scavenging activities were over the 70% in the $500{\mu}g/mL$ concentration. During the five weeks study, the food efficiency ratio was no significant differences between the HFD and HFD+RCE. Liver weight of HFD+RCE (3.75 g/100 g BW) was significantly decreased compared to those of the HFD. Hepatic triglyceride and total cholesterol levels of HFD+RCE were significantly lower compared to those of the HFD. The hepatic TBARS contents in the HFD+RCE was significantly decreased to the HFD, radical scavenging activity was markedly increased in HFD+RCE as normal group. In histological observation of liver tissues, the hepatocytes of HFD+RCE appeared the reduced aspects on the size and numbers of lipid droplets in cytoplasm compared to the HFD. Our results suggest that RCE could have antioxidant activities and hepatic hypolipidemic effects by its phenolic compounds.