• Journal of the Korean Society of Food Science and Nutrition
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• 제24권3호
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• pp.362-370
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• 1995

Human plasma low density lipoprotein(LDL) is the main carrier for cholesterol, and recent studies suggest the normal LDL can be readily oxidized by free radical and not interact with LDL receptor. Lipoprotein pariticles are consisted of lipid andprotein, and fatty acids of lipoproteins are prone to oxidation. LDL particles readily undergo oxidative modification by copper. From the results, oxidized LDL altered its biological properties. A marked increase in the electrophoretic mobility of LDl on agarose gel indicated that negative surface charge of the LDL particles was increased. Also, the results from the HPLC showed that oxidized LDL was degraded into several polypeptides nonenzymatically. Degradation tests which measured the amount of 5-IAF labelled oxidized LDL were carried out by monocyte and hepatocyte cell culture. Hepatocyte cell culture of modified LDL did not show consistent pattern. However, binding rate of modified LDL with HMDM(human monocyte derived macrophage) was enhanced with oxidation, but was retarded by addition of antioxidants(hyaluronic acid, vitamin A, vitamin E). Also comparisons of oxidized-LDL, acetyl-LDL and MDA-LDL showed significant differences in the chemical properteis and binding affinity to HMDM. Thus, modificaition of normal LDL altered its biological properties.

• The Korean Journal of Food And Nutrition
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• 제23권3호
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• pp.361-367
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• 2010

In this study, cysteine compounds found in genus Allium plants, including N-acetyl cysteine(NAC), S-allyl cysteine(SAC), S-ethyl cysteine(SEC), and S-methyl cysteine(SMC), were examined for effects on blood glucose, glucose tolerance, and plasma lipid concentrations in streptozotocin(STZ)-induced diabetic mice. In the mice, the ingestion of these cysteine compounds did not affect blood glucose levels significantly. However, their ingestion did improve the diabetic symptoms of polydipsia, polyphagia, polyuria, and weight loss. Glucose tolerance was also found to be improved in the STZ diabetic animals by feeding the cysteine compounds. Treatment of the compounds also caused a slight decrease in plasma concentrations of total cholesterol along with increases in HDL-cholesterol and slight decreases in LDL-cholesterol, resulting in a significant decrease in the atherogenic index of plasma in the diabetic animals. They also showed reductions of liver triglyceride content to relieve diabetic fatty liver syndrome. In summary, the cysteine compounds such as NAC, SAC, SEC, and SMC, found in genus Allium plants, had certain beneficial effects on blood glucose metabolism along with preventing abnormalities in lipid metabolism, a complication of diabetes, by improving the atherogenic index of plasma and fatty liver in STZ-induced diabetic mice.

• BMB Reports
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• 제36권3호
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• pp.312-318
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• 2003

The purpose of this study was to investigate the effects of altering relative intakes of fat and carbohydrates on serum lipid profiles, hepatic acyl-CoA synthetase (ACS), carnitine palmitoyltransferase-I (CPT-I), and the acetyl-CoA carboxlyase (ACC) mRNA level in Sprague-Dawley rats. For four weeks the rats were fed either an AIN-76 diet or one of its modified diets that were supplemented with 20% beef tallow (high-fat diet, HF) and 66.3% sucrose (highsucrose diet, HS). The HS group had significantly higher serum triglyceride and total cholesterol concentrations when compared with the other groups. Serum LDL-cholesterol concentrations in the HS and HF groups were significantly higher when compared to the normal diet (ND) group. Serum HDL-cholesterol levels of the ND and HS groups were significantly higher than those of the HF group. The hepatic total lipid level of the HF group was significantly higher than those of other groups; triglyceride levels of the HS and HF groups were significantly higher than those of the ND group. Hepatic ACS mRNA levels of the HF group were significantly higher than those of the ND group. Hepatic CPT-I mRNA levels were higher in the HF group than other groups. Also, ACC mRNA levels in the liver increased in the HF group. In conclusion, changes in the composition of dietary fat and carbohydrates could affect the hepatic ACS, CPT-I, and ACC mRNA levels. These results facilitate our understanding of the coordinated regulation of the ACS, CPT-I, and ACC mRNA levels and will serve to enhance our understanding of the molecular mechanisms that underlie the regulation of fatty acid metabolism.

• Asian-Australasian Journal of Animal Sciences
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• 제13권4호
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• pp.516-520
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• 2000

The present study was conducted to evaluate effect of fermented chub mackerel extract (FCME) on lipid metabolism of rats fed a diet supplemented with 1% cholesterol. Four week-old male rats were divided into three groups of 15 rats with 0, 0.1% or 0.2% FCME supplementation. In comparison with control, rats fed 0.2% FCME showed reduction of activities of acetyl-Coenzyme A carboxylase (p<0.05), 3-hydroxy-3-methyl glutaryl Coenzyme A reductase (p<0.01) and fatty acid synthetase (p<0.01). Rats fed 0.2% FCME also showed reductions in free cholesterol in the liver (p<0.05), and in concentrations of free cholesterol (p<0.05), LDL+VLDL-cholesterol (p<0.05), triglyceride (p<0.01) and phospholipid (p<0.01) in the plasma. Plasma HDL-cholesterol concentration was significantly (p<0.05) higher in treatment groups as compared with control group. Atherogenic index was also significantly lower in rats fed 0.1% or fed 0.2% supplement diet, whereas bile acid in feces was not significantly affected. The current study showed that 0.2% inclusion level of the fermented chub mackerel extracts might have hypolipidemic properties.

• Asian-Australasian Journal of Animal Sciences
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• 제14권4호
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• pp.535-539
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• 2001

The present study was conducted to evaluate the effect of fermented chub mackerel extract (FCME) on lipid metabolism in rats fed diets without cholesterol. Four week-old male rats were divided into three groups of 10 rats with 0, 1% or 2% FCME supplementation to the diets. Purified diets were used in the present study. Feed and water were fed ad libitum. FCME supplementation had no effect on the activities of acetyl-CoA carboxylase, fatty acid synthetase, and the content of free cholesterol, triglyceride and phospholipid in the liver (p>0.05). 1% FCME supplementation significantly increased serum triglyceride (p<0.05) and hepatic 3-hydroxy-3-methylglutaryl-CoA reductase activity (p<0.05) with no effect on serum total cholesterol, free cholesterol and phospholipid concentration. FCME supplementation significantly reduced serum LDL+VLDL-cholesterol (p<0.01) and atherogenic index (p<0.01) with no effect on HDL-cholesterol. The current study showed that FCME inclusion might reduce the risk of atherosclerosis in rats fed diet without cholesterol.

• Journal of Physiology & Pathology in Korean Medicine
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• 제33권5호
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• pp.282-287
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• 2019

In this study, we investigated the anti-obesity effects of various mixtures of Atractylodes macrocephala (AM) and Amomum villosum (AV) water extracts on high-fat diet (HFD) induced mouse model. We classified five groups as follows; control, HFD, HFD + AM extracts : AV extracts (100mg/kg) (1:1), HFD + AM extracts : AV extracts (100mg/kg) (2:1), HFD + AM extracts : AV extracts (100mg/kg) (3:1). Oral administration of various mixtures of AM and AV extracts for 6 weeks inhibited HFD-induced increases of body, liver and epididymal fat weights. Also, lipid profiles including LDL cholesterol were improved by various mixtures of AM and AV extracts treatment compared with HFD-fed group. Lipogenesis-related genes such as acetyl coA carboxylase (ACC) and fatty acid synthase (FAS) in liver changed in a favorable way for lipid biosynthesis by HFD compared to control, but various mixtures of AM and AV extracts-treated groups did not. Our results show that various mixtures of AM and AV extracts can prevent HFD-induced obesity in mice and suggests that the mechanisms are involved in expressions and modifications of lipogenesis-related genes such as ACC and FAS in liver.

• Nutrition Research and Practice
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• 제18권2호
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• pp.180-193
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• 2024

BACKGROUND/OBJECTIVES: Obesity is a major cause of metabolic disorders; to prevent obesity, research is ongoing to develop natural and safe ingredients with few adverse effects. In this study, we determined the anti-obesity effects of Rosa multiflora root extract (KWFD-H01) in 3T3-L1 adipocytes and Sprague-Dawley (SD) rats. MATERIALS/METHODS: The anti-obesity effects of KWFD-H01in 3T3-L1 adipocytes and SD rats were examined using various assays, including Oil Red O staining, gene expression analyses, protein expression analyses, and blood biochemical analyses. RESULTS: KWFD-H01 reduced intracellular lipid accumulation and inhibited the mRNA expression of peroxisome proliferator-activated receptor γ (PPARγ), cytidine-cytidine-adenosine-adenosine-thymidine (CCAAT)/enhancer binding proteins (C/EBPα), sterol regulatory element-binding transcription factor 1 (SREBP-1c), acetyl-CoA carboxylase (ACC), and fatty acid synthase (FAS) in 3T3-L1 cells. KWFD-H01 also reduced body weight, weight gain, and the levels of triglycerides, total and LDL-cholesterol, glucose, and leptin, while increasing high-density lipoprotein-cholesterol and adiponectin in SD rats. PPARγ, C/EBPα, SREBP-1c, ACC, and FAS protein expression was inhibited in the epididymal fat of SD rats. CONCLUSION: Overall, these results confirm the anti-obesity effects of KWFD-H01 in 3T3-L1 adipocytes and SD rats, indicating their potential as baseline data for developing functional health foods or pharmaceuticals to control obesity.

• Journal of Nutrition and Health
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• 제50권6호
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• pp.543-551
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• 2017

Purpose: The objective of the present study was to determine whether fermentation can increase the protective effects of blueberry liquid in a high-fat diet-induced obese mice model. Methods: Male C57BL/6J mice were fed a high-fat diet (HD, 60% fat, w/w,), HD supplemented with 10 ml/kg BW/day of blueberry liquid (BHD, blueberry high-fat diet), or HD supplemented with 10 ml/kg BW/day of fermented blueberry liquid (FBHD, fermented blueberry high-fat diet) for 10 weeks. Results: There were significant decreases in the body, epididymal adipose tissue, and liver weights of blueberry-fed groups compared to HD, whereas there were no significant differences in food intake among the groups. Furthermore, blueberry liquid groups, especially fermented blueberry liquid, significantly attenuated the contents of hepatic triglycerides and total cholesterol induced by HD. Serum LDL-cholesterol was significantly lower in the BHD and FBHD-fed groups, whereas FBHD significantly increased the serum HDL-cholesterol level compared to the control. Concentrations of aspartate transaminase, alanine transaminase, and leptins in serum were also reduced by blueberry liquid supplementation. The mRNA expression of hepatic acetyl CoA carboxylase was significantly reduced in both the BHD and FBHD groups compared to HD. Furthermore, FBHD altered the mRNA expression level of hepatic lipolysis genes. Conclusion: In conclusion, these results suggest that blueberry, especially fermented blueberry liquid, may improve obesity-related abnormalities.

• Food Science of Animal Resources
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• 제28권1호
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• pp.91-98
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• 2008

This study was conducted to reveal the effects of pork consumption on the renal and hematochemical indices of workers occupationally exposed to an unclean environment for 6 weeks. Forty-five free-living volunteers were recruited from the workers employed in a car-engine part factory and a leather dyeing company in the Gyeonggi area. Volunteers were to submit a subject consent form prior to the study. They were asked to complete a questionnaire on dietary habits, and blood and urine samples were collected before and after the pork consumption trial. Pork dishes were fed twice weekly (150g per meal) as part of lunch or dinner at the work place. Urine N-Acetyl-${\beta}$-D-glucosamidase (NAG) levels were reduced after the trial, but total-cholesterol, HDL-and LDL-cholesterol levels did not change. However, triglyceride levels did increase significantly (p<0.005). The Zn, Pb, and Cd concentrations in serum tended to decrease, though without statistical significance. In conclusion, the regular consumption of pork may be beneficial for renal functions, however further research in this area is needed.

• Korean Journal of Food Science and Technology
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• 제51권3호
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• pp.272-277
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• 2019

The effects of medium-chain enriched diacylglycerol (MCE-DAG) oil on hepatic cholesterol homeostasis were investigated. HepG2 hepatocytes were treated with either 0.5, 1.0, or $1.5{\mu}g/mL$ of MCE-DAG for 48 h. There was no evidence of cytotoxicity by MCE-DAG up to $1.5{\mu}g/mL$. The level of proteins for cholesterol uptake including CLATHRIN and LDL receptor increased by MCE-DAG in a dose-dependent manner (p<0.05). Furthermore, proprotein convertase subtilisin/kexin type 9, an inhibitor of LDLR, was dose-dependently diminished (p<0.05), indicating cholesterol clearance raised. MCE-DAG significantly increased 3-hydroxy-3-methylglutaryl-coenzyme A reductase and acetyl-CoA acetyltransferase2 (p<0.05), required for cholesterol synthesis, and their transcriptional regulator sterol regulatory element-binding protein2 (p<0.05). These findings suggest that given conditions of prolonged sterol fasting in the current study activated both hepatic cholesterol synthesis and clearance by MCE-DAG. However, total intracellular level of cholesterol was not altered by MCE-DAG. Taken together, MCE-DAG has the potential to prevent hypercholesterolemia by increasing hepatic cholesterol uptake without affecting intracellular cholesterol level.