• Journal of Nutrition and Health
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• 제36권10호
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• pp.990-996
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• 2003

This study was conducted to investigate the effects of Forsythia viridissima Lindl. (FVL) on antioxidative defense system and lipid peroxidation of liver in rats fed high-cholesterol diet. Sprague-Dawley male rats weighing 100 $\pm$ 10 g were randomly assigned into five experimental groups fed 0.5％ cholesterol ; HC group which was not supplemented FVL extract, 0.05％ methanol extract diet group (MSI group), 0.1％ methanol extract diet group (MS2 group), 0.025％ ethylacetate-souble fraction diet group (ES1 group) and 0.05％ ethylacetate-souble fraction diet group (ES2 group). Experimental diets were fed ad libitum to the rats for 3 weeks. The hepatic xanthine oxidase (XOD) activity in the MS2 group was decreased to 20％ as compared to HC group. The activities of hepatic superoxide dismutase (SOD) and catalase (CAT) were not significantly different among all the high cholesterol diet groups. The hepatic glutathione peroxidase (GSHpx) activity in MS2, ES2 groups were significantly increased as compared to HC group. The hepatic glutathione S-transferase (GST) activity in the MS2 group was increased to 20％ as compared to HC group. The levels of hepatic TBARS in the MS1, MS2, ES1 and ES2 groups were reduced by 13％, 21％, 13％ and 21％, respectively, as compared with HC group. The contents of lipofuscin in liver tissue was not significantly different among all the experimental groups. The results indicate that FVL extract may reduce oxidative damage by activating antioxidative defense system of liver in rats fed high-cholesterol diets.

• Journal of Nutrition and Health
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• 제27권8호
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• pp.785-794
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• 1994

The effect of feeding various diets on plasma lipids, liver lipids, fecal excretion of lipids and triglyceride secretion rate was studied in Sprague-Dawley rats fed for 1 month diets containing high fat(40% of energy ; HF) high cholesterol(1% ; HC), low fat/high sucrose(70% ; HS) or control diet(CT). Weight gain in HS group but there were no differences in TG contents of HF or HC groups compared to CT group. Fecal excretion of lipid was higher in HC than in HF, HS and CT groups. Hepatic TG secretion was not significantly different in four dietary groups. Accordingly, hypertriglyceridemia shown in HS group does not seem to be resulted from the increased TG secretion rate.

• Food Science and Biotechnology
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• 제15권5호
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• pp.710-714
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• 2006

The present study examined the lipid lowering and antioxidant activity of Paecilomyces tenuipes. Eight week-old male Sprague-Dawley rats were fed one of the three diets, a reference diet without cholesterol addition (NC), a high fat (17 g/ 100 g)-high cholesterol (1 g/100 g) diet (HC) and a HC diet supplemented with 3% P. tenuipes (PT) for 30 days. Total lipid and total cholesterol were reduced significantly by 33 and 37%, respectively, in the PT diet group compared with controls. A similar reduction was found for low density lipoprotein (LDL) cholesterol levels, while plasma high density lipoprotein (HDL) cholesterol and triglyceride (TG) concentrations were not significantly different among groups. Hepatic total lipid and total cholesterol levels, but not hepatic TG levels, were significantly decreased in the PT group compared to the HC group. The administration of P. tenuipes increased the plasma total antioxidant potential and decreased the levels of lipid peroxidation. These results suggest that P. tenuipes exerts significant health benefits through the modulation of physiological functions including a variety of atherogenic lipid profiles and antioxidants in hypercholesterolemia.

• 한국식품위생안전성학회지
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• 제9권2호
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• pp.57-66
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• 1994

The benefits of milk on the rats supplemented with cholesterol and vitamin D2 in diet was investigated. A total of 150 male rats of Sprague-Dawley strain, 5 weeks of age, were divided into 6 groups with the diet. Cholesterol control group was fed the diet containing 1.0% choleterol and 50,000 IU/100 g of vitamin D2 for 24 months, and M0.5, M1, M2 and M5 of milk groups were fed the diet containing cholesterol, vitamin D2 and 0.5, 1, 2 and 5 of reference daily intakes of whole milk, respectively. No remarkable differences of growth, diet intake, and food effciency ratio among groups were observed though rats in cholesterol control group showed abrupt decrease of diet intake and body weight showed slightly higher relative organ weights than did the rats in control group. The rats in cholesterol control group showed the highest serum total cholesterol level. The rats in milk groups showed lower total cholesterol level and higher high density lipoprotein (HDL)-cholesterol fraction than did the rats in cholesterol control group though no tendency was observed among milk groups. In milk groups, aorta, heart, kidney and liver of rats showed milder calcification and necrosis or fat degeneration compared with those in cholesterol control group. The above results suggest that whole milk could have beneficial effect on the cholesterol-and -vitamin D2-induced atherosclerosis in rats.

• 동의생리병리학회지
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• 제21권1호
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• pp.104-110
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• 2007

Aralia contientalis show several beneficial effects including anti-oxidant effects. Aralia contientalis is used as a therapeutic agent to stop haemorrhages and a tonic to promoted health in Korean and Chinese medicine. The pharmacokinetic profiles of the main Aralia contientalis is still not accurately investigated. In present study, I examined the effects of water extracts of Aralia contientalis on high cholesterol diet atherosclerosis-induced rats in serum and abdominal aorta. A total of 3-week old 9 male rats of Sprague-Dawley were divided into 3 groups and fed with the basal diet (normal group), high cholesterol diet (atherosclerosis induced group) for 8 weeks, high cholesterol diet supplemented with water extracts of Aralia contientalis (Aralia contientalis group) for 2 weeks. And rats were sacrificed, serum lipid level, abodominal aortic anti-oxidant activities and lipid peroxide were measured. These results indicated that serum total cholesterl, LDL-cholesterol, triglycerides concentration significently lowered in Aralia contientalis group than high cholesterol diet group. But HDL-cholesterol concentraion significently higher in Aralia contientalis group than high cholesterol diet group.

• 한국식품영양과학회지
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• 제30권6호
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• pp.1190-1196
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• 2001

고콜레스테롤 식이 횐쥐에서 xylooligo당이 간장에서의 콜레스테롤대사에 미치는 영향을 관찰하였다. 실험동물은 100$\pm$10g의 Sprague-Dawley 횐쥐를 이용하여 정상 식이군과 1% 고콜레스테롤 실험군으로 나누고 다시 실험군은 1%의 고콜레스테롤 식이에 xylooligo당을 0%, 5%, 10% 및 15% 농도 첨가군(C, C5XO, C10XO 및 C15XO군)으로 나누어 4주간 자유섭식시킨 후 콜레스테롤 대사 개선효과를 알아보았다. 간조직중의 중성지방과 콜레스테롤함량은 정상군에 비해 C군에서는 각각 3.9배, 20배씩 증가되었으며 C군에 비해 C10XO군은 거의 절반으로 감소되었다. 간조직의 HMG-CoA reductase 활성은 정상군에 비해 C군은 45% 감소되었으나, xylooligo당 공급군에서는 정상군 수준이었다. 간조직중의 지방산 조성은 oleic acid( $C_{18:1}$)과 linoleic acid( $C_{18:2}$)은 정상군에 비해 C군에서 유의적(p<0.05)으로 증가되었고, ara chidonic acid( $C_{20:4}$)는 감소되었으나 xylooligo당 공급으로 증가되었다. 총포화지방산(SFA)은 정상군에 비해 고콜레스테롤 식이로 인해 감소되 었으나, xylooligo당 공급으로 정상화되었다. 고콜레스테롤군에서는 총 단일불포화지방산(MUFA)은 증가되었으나, xylooligo당 공급으로 감소되었다. 항혈전지수인 n-3/n-6 지방산 비는 정상군에 비해 C군에서 감소되었으나, xylooligo당 10% 공급군에서는 C군에 비해 유의적으로 증가하였다. 결론적으로 식이 xylooligo당은 고콜레스테롤 식이로 인한 고콜레스테롤 혈증이나 고지혈증의 위험인자인 콜레스테롤을 감소시킬 수 있는 콜레스테롤 대사 개선 기능이 우수하므로 기능성 식품 신소재나 식이섬유의 대용품으로도 활용될 수 있으리라 생각된다.다.

• 한국식품영양과학회지
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• 제35권4호
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• pp.402-409
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• 2006

매생이의 체내 지질대사 개선 효능을 구명하기 위하여 in vivo에서 콜레스테롤 식이로 유발된 고콜레스테롤 혈증 억제효능 효과를 측정하여 검토한 결과, 고콜레스테롤 식이만을 급여한 HC군은 NC군에 비하여 높은 체중증가율을 나타내었다. 매생이 에탄올 추출물 투여군들은 HC군에 비하여 감소되는 경향을 나타냈으며, 특히 매생이 에탄올 추출물 고용량 병합 투여한 HC-CFH군의 체중증가율이 HC군에 비하여 유의하게 감소되었다. 정상식이에 매생이 에탄올 추출물을 투여한 NC-CFL군과 NC-CFH군은 NC군에 비해 체중증가율이 저하되 었으나 유의 차는 없었다. 식이 섭취량은 실험군들 간에 유의차가 없었다. 혈청 중 지질함량 변화는 고콜레스테롤 식이를 급여한 HC군은 NC군에 비하여 중성지방과 총콜레스테롤 함량이 증가되었으며, 고콜레스테롤 식이와 매생이 에탄올 추출물을 병합 투여한 HC-CFL군과 HC-CFH군의 경우 NC군에 가깝게 감소되었으나 유의차가 없었다. 혈청 인지질 함량은 NC군이 HC군에 비해 유의한 증가효과를 보였으며, 고콜레스테롤 식이와 매생이 에탄올 병합투여군들의 혈청 인지질 함량은 NC군 수준으로는 증가되지 않았지만 HC군에 비해서는 증가되었다. 정상식이와 매생이 에탄올 추출물을 투여한 NC-CFL군과 NC-CFH군은 혈청중성지방 및 인지질 함량이 NC군과 비슷한 수준이었으나 혈청 총콜레스테롤 함량은 유의하게 저하되었다. 혈청 LDL-콜레스테롤과 HDL-콜레스테롤 함량은 정상식이 혹은 고콜레스테롤 식이와 매생이 에탄올 추출물을 병합 투여한 군들은 HDL-콜레스테롤 함량이 HC군에 비하여 증가하는 경향이었으나, 유리콜레스테롤 함량은 유의하게 감소하는 효과를 보였다. 정상식이와 매생이 에탄올 추출물을 투여한 NC-CFL군과 NC-CFH군의 혈청 LDL-콜레스테롤, HDL-콜레스테롤 및 유리콜레스테롤 함량은 NC군과 비슷한 경향이었다. 혈청 LDL-콜레스테롤, HDL-콜레스테롤 함량 또한 임상진단에서 순환계와 관련한 진단지수인 동맥경화지수와 심혈관 위험지수는 정상식이 혹은 고콜레스테롤 식이와 매생이 에탄올 추출물을 병합 투여한 모든 군들이 고콜레스테롤 식이를 급여한 HC군과는 달리 유의적으로 낮은 수치를 나타내었으며 NC군과는 비슷한 수준이었다. 간 및 신장 중 중성지방 함량은 고콜레스테롤 식이 급여로 증가된 HC군에 비하여 매생이 고용량 병합 투여한 HC-CFH군에서 유의한 감소를 나타냈으며, 총콜레스테롤 함량도 매생이 에탄올 병합투여로 유의적으로 감소하는 경향이었다. 지방조직의 중성지방 함량은 정상식이 혹은 고콜레스테롤 식이와 매생이 에탄올 추출물을 병합 투여한 모든 군들이 HC군에 비해 유의하게 저하되었으며, NC군에 비해서도 유의 차는 없었으나 저하되었다. 간과 신장의 총콜레스테롤 함량도 매생이 추출물 공급으로 감소하였다. 지방조직의 HR-LPL과 TE-LPL 활성 모두 NC군에 비해 HC군이 증가하였고,매생이 에탄올 추출물을 경구 투여한 모든 군들은 HC군에 비해 유의하게 감소되었으나 NC군과는 비슷한 활성을 나타내었다. 이상의 실험결과 매생이 에탄올 추출물이 고콜레스테롤식이에 의한 체내 콜레스테롤과 중성지방의 상승을 억제시키는 효과와 LPL 활성 저하효과가 있다고 사료되나 어떠한 성분의 작용기전에 의한 것인지에 대한 더욱 체계적인 연구가 요구된다.

• Nutrition Research and Practice
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• 제7권4호
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• pp.287-293
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• 2013

This study determined the effects of fucoxanthin on gene expressions related to lipid metabolism in rats with a high-fat diet. Rats were fed with normal fat diet (NF, 7% fat) group, high fat diet group (HF, 20% fat), and high fat with 0.2% fucoxanthin diet group (HF+Fxn) for 4 weeks. Body weight changes and lipid profiles in plasma, liver, and feces were determined. The mRNA expressions of transcriptional factors such as sterol regulatory element binding protein (SREBP)-1c, Carnitine palmitoyltransferase-1 (CPT1), Cholesterol $7{\alpha}$-hydroxylase1 (CYP7A1) as well as mRNA expression of several lipogenic enzymes were determined. Fucoxanthin supplements significantly increased plasma high density lipoprotein (HDL) concentration (P < 0.05). The hepatic total lipids, total cholesterols, and triglycerides were significantly decreased while the fecal excretions of total lipids, cholesterol, and triglycerides were significantly increased in HF+Fxn group (P < 0.05). The mRNA expression of hepatic Acetyl-CoA carboxylase (ACC), Fatty acid synthase (FAS), and Glucose-6-phosphate dehydrogenase (G6PDH) as well as SREBP-1C were significantly lower in HF+Fxn group compared to the HF group (P < 0.05). The hepatic mRNA expression of Hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) and Acyl-CoA cholesterol acyltransferase (ACAT) were significantly low while lecithin-cholesterol acyltransferase (LCAT) was significantly high in the HF+Fxn group (P < 0.05). There was significant increase in mRNA expression of CPT1 and CYP7A1 in the HF+Fxn group, compared to the HF group (P < 0.05). In conclusion, consumption of fucoxanthin is thought to be effective in improving lipid and cholesterol metabolism in rats with a high fat diet.

• Journal of Pharmaceutical Investigation
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• 제24권4호
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• pp.297-300
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• 1994

Development of hyperlipidemic animal model is prerequisite for the screening of drugs lowering the blood lipoprotein level. In this study, two kinds of diet regimens were tried for the hyperlipidemic effect. The model will be used for the screening of current prescriptions to a variety of diseases related to hyperlipidemia by practioner of traditional herbal medicine. Fifteen male Wister rats of 200g were divided into three groups, and given normal, or either one of the two high cholesterol diets for up to 2 weeks. Regimen HC-1 and regimen HC-2 contained I% and 2% cholesterol in diet, respectively. Total cholesterol (TC), triglyceride (TG), high density lipoprotein cholesterol (HDL) and lower density lipoprotein cholesterol (LDL) levels in the serum were measured before the start of the diet, at 1 week after the start, and at 2 week point. Both regimens resulted in hyperlipidemia with the typical characteristics of increase in TC and LDL, and reduction in HDL, and showed no observable side effects such as diarrhea. In conclusion, both of HC-1 and HC-2 regimens appeared appropriate as diet regimens for the hyperlipidemic rat model.

• Journal of Nutrition and Health
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• 제32권6호
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• pp.628-636
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• 1999

There is a marked increase in geriatric disease, especially liver disease, due to the continuous increase in alcohol and fat consumption. Since the fatty liver, induced by alcohol or fat, is basically from abnormalities in the lipid metabolism, it is possible that fatty acid binding protein(FABP) which is related to the fatty acid metabolism may also be abnormal in these livers. FABP is a small molecular weight protein family present in cytosol in high concentration. It has been proposed as a fatty acid transfer protein and as a binding protein responsible for controlling intracellular free fatty acid concentration. In this research, we have examined the relationship between liver FABP and fatty liver induced by alcohol or high cholesterol diet. Rats were fed one of either semipurified liquid diets; control diet containing 65% carbohydrate, 20% protein, and 15% fat or high cholesterol diet containing 1%(w/w) cholesterol or alcohol diet containing 37% of alcohol instead of carbohydrate. After 5 weeks of feeding period, all rats received commercial chow diet for 5 weeks to examine recovery effect. Liver and blood samples were collected at 0, 1, 3, 5 and 10 weeks to analyze lipid compositions. FABP was purified from liver cytosol and injected to rabbit to obtain antiserum. Liver FABP amount was determined by SDS-PAGE and western blotting methods. Fatty acid binding capacity was determined by binding of 14Cpalmitate with the delipidated liver cytosol. Consumption of alcohol increased serum cholesterol, triglyceride concentration and decreased HDL-cholesterol concentration after 5 weeks. Serum apolipoprotein B concentration increased after 3 weeks and LDL-cholesterol and apolipoprotein A concentration changed after 1 week. Liver cholesterol and triglyceride concentration increased after 3 weeks. Consumption of high cholesterol diet changed liver and serum lipid composition after 3 weeks. Swiching to normal diet for 5 weeks did not normalize most of lipid composition in serum and liver except serum and liver except serum cholesterol, triglyceride and liver cholesterol. Liver cytosol FABP content and the fatty acid binding capacity decreased dramatically after 1 week with alcohol consumption. This results indicate that FABP content changes before the changes before the changes of blood or liver lipid composition, suggesting changes of FABP may cause development of the fatty liver induced by alcohol and can be used as an index of detecting a early development of fatty liver.