• Nutrition Research and Practice
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• v.12 no.4
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• pp.298-306
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• 2018

BACKGROUND/OBJECTIVES: Obesity is a global health problem of significant importance which increases mortality. In place of anti-obesity drugs, natural products are being developed as alternative therapeutic materials. In this study, we investigated the effect of Brassica juncea L. leaf extract (BLE) on fat deposition and lipid profiles in high-fat, high-cholesterol diet (HFC)-induced obese rats. MATERIALS/METHODS: Male Sprague-Dawley rats were divided into four groups (n = 8 per group) according to diet: normal diet group (ND), high-fat/high-cholesterol diet group (HFC), HFC with 3% BLE diet group (HFC-A1), and HFC with 5% BLE diet group (HFC-A2). Each group was fed for 6 weeks. Rat body and adipose tissue weights, serum biochemical parameters, and tissue lipid contents were determined. The expression levels of mRNA and proteins involved in lipid and cholesterol metabolism were determined by reverse transcription polymerase chain reaction and western blot analysis, respectively. RESULTS: The HFC-A2 group showed significantly lower body weight gain and food efficiency ratio than the HFC group. BLE supplementation caused mesenteric, epididymal, and total adipose tissue weights to decrease. The serum levels of triglyceride, total cholesterol, and low-density lipoprotein cholesterol were significantly reduced, and high-density lipoprotein cholesterol was significantly increased in rats fed BLE. These results were related to lower glucose-6-phosphate dehydrogenase, acetyl-coA carboxylase, and fatty acid synthase mRNA expression, and to higher expression of the cholesterol $7{\alpha}$-hydroxylase and low density lipoprotein-receptor, as well as increased protein levels of peroxisome proliferator-activated receptor ${\alpha}$. Histological analysis of the liver revealed decreased lipid droplets in HFC rats treated with BLE. CONCLUSIONS: Supplementation of HFC with 3% or 5% BLE inhibited body fat accumulation, improved lipid profiles, and modulated lipogenesis- and cholesterol metabolism-related gene and protein expression.

• Journal of Nutrition and Health
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• v.36 no.5
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• pp.483-490
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• 2003

Chitosan, hydroxycitrate and L-carnitine have been known to be antiobesity components. The purpose of this study was to evaluate the combined effects of chitosan, hydroxycitrate and L-carnitine mixture as a potential antiobesity supplement in overweight women. Pre-menopausal healthy females who were overweight (percent ideal body weight > 110) were included in this study. Forty-nine subjects randomly received a placebo (n = 25) or antiobesity-supplement (n = 24), which was a mixture of chitosan, hydroxycitrate, and L-carnitine. Before and after the eight-week experimental period, anthropometric parameters, blood components and computerized tomography were measured. At baseline, the two groups were well matched in terms of age, body mass index and lipid profile. After the eight weeks of potential antiobesity supplementation, the subjects' body fat percent had decreased significantly (p < 0.001) by 5.6% (39.1 $\pm$ 1 vs 36.9 $\pm$ 1%) while lean body mass increased (p < 0.01). Vsceral fat area at the L4 vertebra decreased significantly (p < 0.01) by 8.6% in the supplemented group and the total fat area at the L4 vertebra showed a tendency to decrease (p = 0.051) by 2.4%. Also, in the group given the antiobesity-supplement rather than the placebo, the fasting triglyceride level decreased significantly (p < 0.05) by 10.0%. In addition, serum total cholesterol levels in the antiobesity-supplement group showed a tendency to decrease (p=0.159) by 2.7% (194 $\pm$ 6 vs 189 $\pm$ 6 mg/dl). No side effects were found in either group during the intervention. In conclusion, the present study demonstrated that taking a mixture of chitosan, hydroxycitrate, and L-carnitine as a potential antiobesity supplement for eight weeks produced advantageous changes in the weight and visceral fat accumulation of overweight women without any side effects. (Korean J Nutrition 36(5): 483~490, 2003)

• Journal of Nutrition and Health
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• v.32 no.5
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• pp.552-560
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• 1999

In this study, we investigated the effects of lowering the fat and cholesterol in the diets of 26 Korean hypercholesteolemic men($\geq$240mg/dl). They consumed 2378kcal/day with 20.9% of the energy deriving from fat, and a cholesterol intake of 282mg(118mg/1000kcal). The experimental diet consisted of 2400kcal, the same as their usual diet, but the fat content was restricted to 15%, and the cholesterol level to below 100mg/1000kcal. The subjects kept to this diet for four weeks and were asked to maintain their usual life activities during the experimental period. The dietary intake and levels of plasma lipid, lipoprotein-cholesterol and apoprotein of the subjects were analyzed before, two weeks into, and after four weeks dietary intervention. After two of the dietary intervention, there were no significant changes of plasma total cholesterol or triglyceride levels but there was some changes of phospholipid level. However, after four weeks, the levels of plasma total cholesterol, triglyceride, and phospholipid had decreased significantly: 18.2%, 32.9%, and 11.9%, respectively. And the LDL-cholesterol and VLDL-cholesterol levels also showed a marked reduction of 18.1%, and 33.0% respectively without change of HDL-cholesterol level. There were no changes in the levels of Apo-A 1, Apo-B, or Lp(a). The changes of the plasma lipid levels were significantly associated with the changes in dietary fat intake but not the cholesterol intake. In conclusion, although the responses to the dietary intervention varied among the individual subjects, the lowering of dietary fat component from 21% to 15% of energy intake seems to be an effective way to reduce plasma cholesterol and triglyceride levels without decreasing HDL-cholesterol level. It was also found that the restriction of dietary cholesterol to below 100mg/1000kcal not seem to be effective for the hypercholesterolemic patient who already consuming below 300mg/day of cholesterol.

• Asian-Australasian Journal of Animal Sciences
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• v.18 no.7
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• pp.933-941
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• 2005

To develop a functional cDNA chip, specific genes expressed in the tissues of swine Kagoshima Berkshire were screened. A total of 4,434 ESTs were obtained by constructing a cDNA library from total RNA isolated from the muscle and fat tissues, affirming their functions by investigating similarity of nucleotide sequences with the database at the NCBI. Among them, 1,230 ESTs were confirmed as novel genes, which, to date, have not been identified. Attaching the genes to a cDNA microarray slide revealed expression patterns of genes in muscle and fat according to the growth stages of swine. As specific genes expressed in the muscle tissues of swine with body weight of 30 kg, 60 genes including actin, myosin, tropomysin, transfer RNA-trp synthetase, Kel-like protein 23, KIAA0182 and COI, Foocen-m, etc were obtained. In addition, 18 novel genes were obtained. As specific genes expressed in fat tissues of swine with body weight of 30 kg, 47 genes including annexin II, Collagen, Fibronectin, Pleckstrin homology domain, serine protease, etc were obtained. 21 novel genes were also obtained. The genes specifically expressed in the muscle and fat tissues of swine affect contraction and relaxation of the muscle and the fat. However, studies on the expression mechanisms of the genes are insufficient. To reveal species of structural genes in swine muscle and fat tissue, interrelation studies in expression and function of genes by using the cDNA chip should be conducted.

• The Korean Journal of Food And Nutrition
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• v.26 no.1
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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.

• Korean Journal of Community Nutrition
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• v.17 no.6
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• pp.714-723
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• 2012

The aim of this study was to compare nutrient intakes, serum hormones (leptin, adiponectin, insulin), salivary cortisol and ${\alpha}$-amylase of middle-aged women by the percentage of body fat (% fat). Subjects were assigned to 3 groups by body fat (%) group I (27.5%), group II (32.5%), group III (37.7%). WHR of group II (0.97) was significantly higher than of group I, III (0.95) (p < 0.05). Nutrient intakes were not different among 3 groups. Serum leptin levels of group III ($16.53{\mu}g/ml$) were higher than in group I ($10.07{\mu}g/ml$), group II ($12.24{\mu}g/ml$) (p < 0.05). Salivary cortisol levels of group II ($0.39{\mu}g/dl$) were higher than in group I ($0.17{\mu}g/dl$) and group III ($0.15{\mu}g/dl$) (p < 0.05). Adiponectin concentrations were negatively correlated with TAS (r = -0.29) and positively correlated with HDL cholesterol (r = 0.27). Insulin levels were negatively correlated with total cholesterol (r = -0.33), Zn intake (r = -0.31) and positively correlated with WHR (r = 0.31). The overall anthropometric indices showed positive relations with leptin levels. Salivary cortisol levels were positively corelated with WHR (r = 0.28), total cholesterol (r = 0.31), MDA (r = 0.29) and intakes of SFA (r = 0.35) and MUFA (r = 0.3). Salivary amylase levels were positively correlated with overall nutrient intakes (energy, CHO, fat, cholesterol. Fe, SFA, MUFA, Zn, Na, vitamin $B_2$, r = 0.24-0.5) and was negatively correlated with HDL cholesterol (r = -0.34). These results suggested that 1) WHR would be a helpful index in the assessment of metabolic risk diseases. 2) Understanding of individual stress exposure should be considered in developing strategies for prevention and treatment of obesity.

• Journal of Physiology & Pathology in Korean Medicine
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• v.19 no.2
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• pp.459-465
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• 2005

This study was conducted to investigate the application possibility of leaf and stem extract(LSE) extracted from mixture of leaf and stem of ginseng radix (Panax Ginseng C.A. Meyer). We conducted analysis of the ginsenoside content by HPLC. Also we investigate the effects of the LSE on the reduction of serum lipid and improvement of blood parameters in rats fed high fat diet 5 weeks. We examined by analyzing the serum total cholesterol, HDL-cholesterol, LDL-cholesterol, triglyceride and atherogenic index and hematological datas and serum metabolic variables. Sprague-Dawley rat weigh $150\;g\;{\pm}\;15\;g$, were ramdomly assigned to 4 groups, basal diet only(BDG), high fat diet weithout LSE(FDCG), high fat diet and 10% LSE(FD10G), high fat diet and 20% LSE(FD20G). The result of this study were as follow. Hematological datas of 4 groups were same level, which were not significant. The activities of ALP, GOT and LDH level were significantly different. Total cholesterol, LDL-cholesterol, triglyceride contentrations in serum and atherogenic index were remarkably reduced in LSE supplemented groups as compared high fat control groups. These result imply that LSE could be used as possible for decrease of serum lipid concentration.

• Journal of Applied Biological Chemistry
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• v.66
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• pp.328-337
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• 2023

We investigated the effects of single and combined administrations of Lactobacillus species (L. plantarum, LP; L. gasseri, LG; L. casei, LC) on blood lipid metabolism and obesity in mice fed a high-fat diet (HFD). The mice were continuously supplemented with LP, LP/LG, or LP/LG/LC, along with HFD, for 12 weeks. The consumption of HFD led to significant increases in body weight, total cholesterol, and triglyceride levels compared to the normal control group. However, administration of LP, LP/LG, or LP/LG/LC to HFD-fed mice reduced body weight gain and showed a tendency to suppress the levels of total cholesterol, triglycerides, and LDL-cholesterol, while increasing HDL-cholesterol levels. The HFD group exhibited increased abdominal fat weight and larger adipocytes in the epididymal adipose tissue compared to the NC group. However, the administered probiotics led to a significant reduction in adipocyte size with decreasing tendency in abdominal fat weight compared with the HFD group. Additionally, the deposition of giant vesicular fat cells in the liver of the HFD group considerably decreased in the probiotic-administered group. Microbiome analysis revealed an imbalance in intestinal microbes in the HFD group, characterized by lower Bacteroidetes and higher Proteobacteria ratios. However, probiotic administration tended to restore the microbial distribution by controlling the abundance of Bacteroidetes and Proteobacteria, resulting in decreased Firmicutes/Bacteroidetes and Proteobacteria/Bacteroidetes ratios. These results suggest that single and combined administration of LP and other probiotics holds enormous potential in reducing obesity in HFD-fed mice as they regulate lipid metabolism, reduce adipocyte size, and restore the balance of intestinal microbes.

• Journal of Nutrition and Health
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• v.14 no.1
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• pp.34-40
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• 1981

This study was conducted to investigate the level of total serum cholesterol, triacylglycerol(TG), and phospholipid(PL) and the ratio of serum lipoprotein fractions of rats fed various types and amounts of fats for 12 weeks. Male weaning rats were fed one of four semipurified diets: control diet supplied 12% of calories as fat(polyunsaturated fatty acid:saturated fatty acid, 2 : 1), low fat diet supplied 3% of calories as fat(polyunsaturated fatty acid: saturated fatty acid, 2 : 1), 45%-corn oil diet supplied 45% calories from corn oil, and 45%-butter fat diet supplied 45% calories from butter fat. The level of total cholesterol in serum was increased in rats of 45%-butter fat diet group for the experimental period from 4 to 12 weeks, in rats fed 45%-corn oil diet from 8 to 12 weeks, but low fat diet group(3%-fat diet) is not different for all experimental period, compared with rats of control group(12%-fat diet). The level of TG in serum was also increased in rats fed 45%-butter fat diet for the entire experimental periods and in rats of low fat diet and 45%-corn oil diet groups at 12 weeks only, compared with control diet group. Specially TG in serum of rats fed low fat diet was remarkably increased at 12 weeks. After 12 weeks the level of PL in serum of rats fed low fat diet was lower than other diet groups. ${\alpha}$-Lipoprotein portion of lipoprotein fraction in serum was lower in rats fed 45%-butter fat diet at 4,8 and 12 weeks and rats fed low fat diet at 12 weeks, compared with control diet group and ${\beta}$-lipoprotein portion was reversely increased. Among them the ratio of lipoprotein fraction in rats fed low fat diet for 12 weeks was most significantly different.

• Journal of Physiology & Pathology in Korean Medicine
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• v.25 no.6
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• pp.1026-1031
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• 2011

This experimental study was designed to investigate the inhibitory effects of hot water extract of Yukeuigambi-tang (YEGT) on high-fat diet-induced obesity and hyperlipidemia in C57BL/6 mice. Animals were divided into normal, control, YEGT(sample A 3.8 g/kg, and sample B 7.6 g/kg) treated group. Obesity with hyperlipidemia was induced by high fat diet treatment for 6 weeks. YEGT was given to the animals by oral gavage. The effect of YEGT on the body weight change, total cholesterol, HDL-cholesterol, LDL-cholesterol, triglyceride, and leptin levels in serum were evaluated. In respect to the body weight change, sample B significantly reduced body weight compared with control group in the 6th weeks. In the total cholesterol, triglyceride, and leptin level, sample B significantly reduced all of them compared with control group; sample A significantly reduced triglyceride and leptin levels compared with control group. The above results suggest that YEGT is effective to prevention and treatment of obesity and hyperlipidemia.