Park Hyun-Woo;Yang Mi-Suk;Lee Ji-Hae;Shin Eui-Seok;Kim Yoo;Chun Ji-Young;Lee Tae-Ryong;Lee Sang-Jun
Nutritional Sciences
/
v.9
no.3
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pp.179-189
/
2006
Objective: We investigated the efficacy of a 12-week supplementation of soy isoflavone with L-carnitine on the development of obesity in high fat-induced obese C57BL/6J mice, which are known as a good model of diet-induced obesity. Methods: We measured body weights, adipose tissue mass, serum/liver lipid profiles and fat cell size/number in C57BL/6J mice fed diets containing either low fat (4%) or high fat (35%), or high fat supplemented with soy isoflavone powder containing 10% isoflavone and L-camitine for 12 weeks. Results: Body weight gain, abdominal adipose tissue and liver weight were lower by 31% 78% and 31.4% respectively, in mice on high fat diet containing soy isoflavone+L-carnitine (SC mixture) compared with high fat diet group. Also, SC mixture improved serum lipid profiles such as total cholesterol (TC), triglycerides (TG), and liver lipid profiles such as total lipids and TG. As subsequent results, this SC mixture prevented high-fat diet from accumulating TG in the liver. The size of fat cell was also significantly decreased in SC mixture fed mice. At the end point of this experiment, our results showed that feeding with soy isoflavone for 12 weeks finally increased camitine palmitoyltransferase 1 (CPT 1) activity through elevating the level of CPT1 expression. Conclusions: This study suggests that long-tenn supplementation with dietary soy isoflavone and L-carnitine is more synergistically beneficial for the suppression of high-fat diet induced obesity by inhibiting liver TG accumulation and the gain in abdominal adipose tissue weight than that with soy isoflavone. The antiobesity effects of SC mixture might be attributed, at least in part, to the induction of fatty acid catabolism by soy isoflavone, genistein.
BACKGROUND/OBJECTIVES: Changes in nutritional status during gestation and lactation have detrimental effects on offspring metabolism. Several animal studies have shown that maternal high-fat diet (HFD) can predispose the offspring to development of obesity and metabolic diseases, however the mechanisms underlying these transgenerational effects are poorly understood. Therefore, we examined the effect of maternal HFD consumption on metabolic phenotype and hepatic expression of involved genes in dams to determine whether any of these parameters were associated with the metabolic outcomes in the offspring. MATERIALS/METHODS: Female C57BL/6 mice were fed a low-fat diet (LFD: 10% calories from fat) or a high-fat diet (HFD: 45% calories from fat) for three weeks before mating, and during pregnancy and lactation. Dams and their male offspring were studied at weaning. RESULTS: Dams fed an HFD had significantly higher body and adipose tissue weights and higher serum triglyceride and cholesterol levels than dams fed an LFD. Hepatic lipid levels and mRNA levels of genes involved in lipid metabolism, including $LXR{\alpha}$, SREBP-2, FXR, LDLR, and ABCG8 were significantly changed by maternal HFD intake. Significantly lower total liver DNA and protein contents were observed in dams fed an HFD, implicating the disturbed liver adaptation in the pregnancy-related metabolic demand. HFD feeding also induced significant oxidative stress in serum and liver of dams. Offspring of dams fed an HFD had significantly higher serum cholesterol levels, which were negatively correlated with liver weights of dams and positively correlated with hepatic lipid peroxide levels in dams. CONCLUSIONS: Maternal HFD consumption induced metabolic dysfunction, including altered liver growth and oxidative stress in dams, which may contribute to the disturbed cholesterol homeostasis in the early life of male mice offspring.
Objective This study investigated the effects of Jeoreongchajeonja-tang in a high-fat diet-induced obesity mouse model. Methods The study examined 9-week-old male mice (C57bl/6J) divided into four groups: the normal(C57bl/6J-Nr), control (high-fat diet only; HFD-CTL), positive-control (high-fat diet with Garcinia cambogia), and experimental (high-fat diet with Jeoreongchajeonja-tang; HFD-JCT) groups. After 7 weeks, the body weight, food efficiency ratio, organ weight, and visceral fat weight of the mice were measured. Blood serum tests, mRNA, liver histopathology, and epididymis adipocytes were also examined. Results Compared with the Control(HFD-CTL) group, the Experimental(HFD-JCT) group given Jeoreongchajeonja-tang showed significant reductions in absolute body weight and food efficiency ratio. The serum alanine aminotransferase, total-cholesterol, triglyceride, low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, insulin-like growth factor-1, and leptin levels were significantly lower in the experimental group than in the control group. The serum adiponectin levels were significantly higher in the experimental group than in the control group. Compared with the control group, the experimental group showed significant reductions in absolute abdominal subcutaneous fat, epididymal adipose tissue, kidney adipose tissue, intestine adipose tissue, and liver, kidney and spleen adipose tissue weights. The C/EBP-${\beta}$, leptin, and SREBP1c/ADD1 mRNA expression were significantly lower in the experimental group than in the control group, while the UCP-2 and adiponectin mRNA expression were significantly higher. Compared with the control group, the experimental group showed a significant reduction in the absolute adipocyte area in the liver and epididymal adipose tissue. Conclusion Jeoreongchajeonja-tang has an anti-obesity effect. Additional clinical studies are expected.
Sixteen early lactating Nili-Ravi buffaloes, four animals in each group, were used in a Completely Randomized Design to evaluate the effect of varying levels of both ruminally protected fat and urea treated corncobs ensiled with or without corn steep liquor (CSL) on feed intake, digestibility and milk production and its composition. Four experimental diets were formulated. The control (C) diet was balanced to contain 0% fat and 35% urea treated corncobs ensiled with 0% CSL. The low fat (LF), medium fat (MF) and high fat (HF) diets had 45, 55 and 65% urea treated corncobs ensiled with 9% CSL and 2, 4 and 6% ruminally protected fat, respectively. Dry matter, crude protein (CP) and neutral detergent fiber (NDF) intakes by buffaloes remained similar across all treatments. However, DM and NDF as a percent of body weight and digestible DM intakes were higher in HF diet when compared to C, LF and MF diets. Digestible NDF intakes were also significantly higher in HF diet as compared to all other diets. The intakes of ADF and digestible ADF were higher in MF and HF than C and LF diets. The significant variation in digestible DM, ADF and NDF intakes may be attributed to the ammoniation of corncobs along with CSL that caused significant changes in the degradability and digestibility of the diets. Ether extract and digestible EE intakes differed significantly (p<0.05) among all treatments. Intakes of EE were the highest in animals fed HF diet, which was because of added fat. Apparent DM digestibility was the highest in animals C diet and was the lowest in those fed LF diet. Neutral detergent fiber and ADF digestibilities were higher in animals fed diets containing urea treated corncobs ensiled with 9% CSL when compared to those fed diets containing urea treated corncobs ensiled without CSL. Apparent digestibility of CP was noted highest (71.47%) in animals fed HF diet when compared to those fed MF (67.75%), LF (67.04%) and C (65.39%) diets. Milk yield (4% FCM) was the higher in buffaloes fed HF, MF and LF diets than those fed C diet. These results indicated that increasing levels both of fat and urea treated corncobs ensiled with CSL elevated the negative effects of poor quality fibrous feed on milk production by buffaloes.
Objectives : Laser therapy started in 1958 when Schawlow and Townes suggested medical value of Laser therapy. He-Ne laser has been utilized as a clinical treatment for various diseases by Plog since 1975. Low Level Laser Therapy (LLLT) has been used as medication for controlling obesity in the Korean Medicine. So this study is planned to investigate the effects of LLLT on the level of serum lipid and weight gain Methods : Experimental groups were divided into normal group(Normal), high fat diet group(Control), high fat diet and LLLT by helium-neon (He-Ne) on the tail is carried out once a 2 day during 5 weeks. The animals were divided into six groups: no ischemia-induced and no LLLT-treated group (Normal), the ischemia-induced and no LLLT-treated group (Control), the ischemia-induced and 5 mW 5 min LLLT-treated group (LLLT5-5), the ischemia-induced and 30 mW 5 min LLLT-treated group (LLLT30-5), the ischemia-induced and 5 mW 10 min LLLT-treated group (LLLT5-10), 30 mW 10 min LLLT-treated group (LLLT30-10). The effect of LLLT is observed by weight gain, food intake, food efficiency, serum of lipid concentrations, liver function and HDL to total cholesterol ratio of rats fed high fat diet for 5weeks. Results : Body weight and food intake were decreased in LLL5-5, LLLT30-5, LLLT30-10. Food efficiency was decreased in LLLT30-10. The level of serum Triglyceride, Free fatty acid, AST, ALT, ALP were decreased in LLLT30-10. Serum HDL-cholesterol was increase in LLLT5-10, LLLT30-10. Also serum ALT was decrease in LLLT5-5 Conclusions : LLLT(30 mW-10 min) is effective on Body weight, food efficiency ratio, the level of serum lipid and protection of liver function by obesity induced by high fat diet, and LLLT(5 mW-5 min) act on decrease of Body weight, food intake and ALT.
Park, Younghyun;Jang, Joonseong;Lee, Dongju;Yoon, Michung
Biomedical Science Letters
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v.24
no.4
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pp.311-318
/
2018
Vitamin C (ascorbic acid) supplementation has been suggested to negatively correlate with obesity in humans and other animals. Previous studies, including ours, have demonstrated that a high-fat diet (HFD) induces obesity and related diseases such as hyperlipidemia, hyperglycemia, insulin resistance, and nonalcoholic fatty liver disease. Here, we investigated the effects of vitamin C on visceral adipocyte hypertrophy and glucose intolerance in C57BL/6J mice. Mice received a low-fat diet (LFD, 10% kcal fat), HFD (45% kcal fat), or the same HFD supplemented with vitamin C (HFD-VC, 1% w/w) for 15 weeks. Visceral adiposity and glucose intolerance were examined using metabolic measurements, histology, and gene expression analyses. Mice in the HFD-VC supplementation group had reduced body weight, mesenteric fat mass, and mesenteric adipocyte size compared with HFD-fed mice. Vitamin C intake in obese mice also decreased the mRNA levels of lipogenesis-related genes (i.e., stearoyl-CoA desaturase 1 and sterol regulatory element-binding protein 1c) in mesenteric adipose tissues, inhibited hyperglycemia, and improved glucose tolerance. In addition, vitamin C attenuated the HFD-induced increase in the size of pancreatic islets. These results suggest that vitamin C suppresses HFD-induced visceral adipocyte hypertrophy and glucose intolerance in part by decreasing the visceral adipose expression of genes involved in lipogenesis.
Kim, Mi-Hyun;Kim, Seol-Hee;Park, Hyun-Woo;Kim, Wan-Gi;Lee, Yeon-Sook
Journal of Nutrition and Health
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v.39
no.8
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pp.733-741
/
2006
The study was conducted to investigate the effects of dietary calcium and soy isoflavone on body fat and lipid metabolism in high fat-induced obesity. Four week old female C57/BL6J mice, known as a good model of diet-induced obesity, were fed low Ca and high fat diet for 6 weeks. After induced obesity, mice were divided into six groups according to diets varying calcium contents (0.1 or 1.5%) and genistein contents (0 or 500 or 1,000 ppm). Body weight, fat pad (perirenal fat and parameterial fat), adipocyte size, serum total lipid and total cholesterol were significantly decreased by both high Ca intake and genistein supplementation. However, the effect of genistein supplementation showed in low Ca-fed groups. Serum LDL-cholesterol and TG were significantly decreased by high Ca intake and genistein supplementation, respectively. In liver, lipogenic enzymes (fatty acid synthase and malic enzyme) activity and TG were significantly decreased by both high Ca intake and genistein supplementation. This inhibitory effect of genistein on lipogenic enzymes showed in low Ca-fed groups. But liver total cholesterol and total lipid were significantly decreased by high Ca intake and genistein supplementation, respectively. Fecal excretion of total lipid, total cholesterol and TG were significantly increased by high Ca intake, not by genistein supplementation. In conclusion, high calcium intake and genistein supplement may be beneficial for suppression of obesity through direct anti-adipogenesis by decreasing fat weight and size and indirect anti-lipo-genesis by inhibiting lipogenic enzymes activity and improving lipid profile.
The long-term effects of vegetable and animal high fat diet on the lipid metabolism were investigated in male weaning rats. The rats were fed one of four semipurified diet ad libitum : control diet supplied 12% of calories as fat(control group), low fat diet supplied 3% of calories as fat(3% F group), 45% corn oil diet supplied 45% calories from corn oil(45% C group) and 45% butter fat diet supplied 45% calories from butte. fat(45% B group). The weights of liver, content of triacylglycerol(TG), total cholesterol and phospholipid(PL) in liver were investigated. The weight of liver of rats, fed 45% corn oil at 12 weeks and fed 45% butter fat for all period of diet were higher than that of control group. The contents of TG in liver of rats, fed 45% corn oil from 8 weeks and fed 45% butter fat for all period of diet were higher than that of control group. The levels of TG in liver of rats fed 45% butter fat were higher than those of rats fed 45% corn oil. The contents of total lipid and cholesterol in liver of rats were increased with similar trend of TG level, but contents of PL in liver had no relation with the levels and types of dietary fat and feeding periods. The liver of rats were observed histochemically by light microscope. Mild to severe level of fatty changes in liver of 45% C and 45% B group were observed at 8 and 12 weeks of diet. The liver of rats in control group appeared to be healthy and normal electron-microscopically, but in fatty degenerated hepatocytes of 45% C and 45% B group, nuclear membranes were irregular and a great number of intracytoplasmic fat vacuoles in cells were variable in size and low in electon density. The numbers of lysosome were increased and secondary lysosomes among them were observed on electron microscope.
To examine the cholesterol-towering effects of extruded products made with cassava starch (CS) and blends of cassava starch with either resistant starch (CS-RS) or oat fiber (CS-OF) hamsters were fed with diets containing a high-cholesterol (2%) and high-fat (17%) diet for 20 days. Hamsters fed with a diet containing no cholesterol were used as a control. Total cholesterol (TC) levels in the CS-RS and CS-OF groups were significantly (p>0.05) lower compared to the CS group by 11.5% and 8.5%, respectively. Also, the diets containing fibers decreased the value of low-density lipoproteins plus very low-density lipoproteins fraction by 32.4% (CS-RS diet) and 51.7% (CS-OF), respectively, as compared to the CS diet. Total lipid values were significantly (p<0.05) lower in hamsters fed the CS-RS diet (916 mg/dL) and CS-OF diet (964 mg/dL) as compared to those fed the CS diet (1661 mg/dL). The results obtained in this study suggest that extruded products containing cassava starch blended with either resistant starch or oat fleer, could prevent health problems associated with high levels of cholesterol and hypertriglyceridemia induced by a high cholesterol and fat diet.
Purpose: Sour cherry (Prunus cerasus L.) contains abounding phytochemicals, such as polyphenols and anthocyanins, and has antioxidative effects. Adenosine monophosphate-activated protein kinase (AMPK) is a crucial regulator in enhancing the lipid metabolism. This study hypothesized that the intake of sour cherry affects AMPK signaling. Therefore, this study examined whether sour cherry regulates AMPK to balance the hepatic lipid metabolism and exert ameliorating effects. Methods: Male C57BL/6J mice had obesity induced with a 45% fat diet. The mice were divided into four groups: control (CON), high-fat diet (HFD), low percentage sour cherry powder (LSC), and high percentage sour cherry powder (HSC). The mice in the sour cherry groups were fed 1% sour cherry or 5% sour cherry in their respective diets for 12 weeks. Results: The body weight, visceral fat weight, and lipid droplet size significantly decreased in the treatment groups. The serum and hepatic triglyceride and total cholesterol levels improved significantly in the HSC group. The low-density lipoprotein cholesterol levels were also reduced significantly, whereas the high-density lipoprotein cholesterol levels were increased significantly in both treatment groups. The sterol regulator binding protein-1c and fatty acid synthase expression levels as fatty acid synthesis-related enzymes were significantly lower in the treatment groups than in the high-fat diet group. Furthermore, the adipose triglyceride lipase and hormone-sensitive lipase expression levels as lipolytic enzyme activity and AMPK/acetyl-CoA carboxylase/carnitine palmitoyltransferase-1 as fatty acid β-oxidation-related pathway were upregulated significantly in both sour cherry groups. Conclusions: These results show that sour cherry intake improves hepatic lipid synthesis and chronic diseases by activating AMPK signaling. Therefore, this study suggests that phytochemical-rich sour cherry can be developed as a healthy functional food.
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