• Asian-Australasian Journal of Animal Sciences
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• v.21 no.12
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• pp.1760-1765
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• 2008

A total of 60 one-day-old Yellow-feather broiler chickens were allotted into treatment and control groups. The treatment group was fed with the diet supplemented with 3% conjugated linoleic acid (CLA) for 48 d, while control group was fed with the diet supplemented with 3% rapeseed oil. Chickens were slaughtered in each group at the age of 49 d, and the blood and the abdominal adipose tissue were sampled. Serum cLeptin and serum cAdiponectin were measured by ELISA. The total RNA was extracted from adipose tissue to measure the abundance of the chicken growth hormone receptor (cGHR), insulin-like growth factor 1 (cIGF-1), insulin-like growth factor I receptor (cIGF-IR), peroxisome proliferator-activated receptor gamma ($cPPAR{\gamma}$), cAdiponectin and cAdipoIR mRNA by RT-PCR using ${\beta}$-actin as an internal standard. Results showed that the CLA decreased the abdominal fat index by 20.93% (p<0.05). The level of serum cLeptin but not serum cAdiponectin was significantly increased by CLA treatment (p<0.05). CLA down-regulated the relative abundance of cGH-R mRNA and $cPPAR{\gamma}$ mRNA in abdominal adipose tissue by 24.74% (p<0.05) and 66.52% (p<0.01) respectively. However, no differences were found between CLA treatment group and control group (p>0.05) in the relative abundance of cIGF-1, cIGF-IR, cAdiponectin, and cAdipoIR mRNA in abdominal adipose tissue. The data suggested that CLA inhibited abdominal fat deposition in broiler chicken may be determined by decreasing the GHR available for GH, and by inhibiting the differentiation of preadipocytes via down-regulation of $PPAR{\gamma}$, but independent of IGF and (or) GH-IGF pathway or adiponectin action.

• Journal of Animal Science and Technology
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• v.47 no.2
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• pp.195-204
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• 2005

The current study was conducted to investigate the effects of dietary conjugated linoleic acid(CLA) on growth performance and body fat metabolism in broiler chickens. A total of 48 male birds aged 3 days were randomly allotted into three dietary groups; CORN(com oil 1.5%), CLA I (com oil 0.75 %+ CLA 0.75 %) and CLA II(CLA 1.5%) groups. After feeding commercial diet ad libitum for 3 weeks, eight selected birds on the basis of body weight were housed, two birds in a cage, and continuously given ad libitum corresponding experimental diet for another 2 weeks. As a result, dietary addition of CLA did not influence on body weight, gain and feed conversion rote. The relative weights of the liver and deposited fats(abdominal and thigh fat' pads) were not also affected by the dietary treatments. Serum glucose, triglyceride and cholesterol levels markedly( P < 0.05) decreased in CLA II compared with those in CORN group. However, serum nonesterified fatty acid(NEFA) was not altered by dietary CLA. Serum leptin level was tended to be decreased by dietary CLA without statistical difference. The diet supplemented with CLA caused a significant(P< 0.05) decrease in hepatic total lipid and NEFA without changing triglyceride level. Also, feeding dietary CLA at the level of 1.5% reduced leptin mRNA expression in the liver and abdominal fats compared with feeding com oil, In conclusion, our results suggest that dietary 1.5% CLA may affect, at least in part, lipid metabolism in the liver of broiler chickens.

• Biomolecules & Therapeutics
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• v.32 no.1
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• pp.146-153
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• 2024

The LEPR (leptin receptor) genotype is associated with obesity. Gut microbiome composition differs between obese and non-obese adults. However, the impact of LEPR genotype on gut microbiome composition in humans has not yet been studied. In this study, the association between LEPR single nucleotide polymorphism (rs1173100, rs1137101, and rs790419) and the gut microbiome composition in 65 non-obese Korean adults was investigated. Leptin, triglyceride, low-density lipoprotein cholesterol, and high-density lipoprotein cholesterol levels were also measured in all participants. Mean ± SD (standard deviation) of age, body mass index, and leptin hormone levels of participants was 35.2 ± 8.1 years, 21.4 ± 1.8 kg/m², and 7989.1 ± 6687.4 pg/mL, respectively. Gut microbiome analysis was performed at the phylum level by 16S rRNA sequencing. Among the 11 phyla detected, only one showed significantly different relative abundances between LEPR genotypes. The relative abundance of Candidatus Saccharibacteria was higher in the G/A genotype group than in the G/G genotype group for the rs1137101 single nucleotide polymorphism (p=0.0322). Participant characteristics, including body mass index, leptin levels, and other lipid levels, were similar between the rs1137101 G/G and G/A genotypes. In addition, the relative abundances of Fusobacteria and Tenericutes showed significant positive relationship with plasma leptin concentrations (p=0.0036 and p=0.0000, respectively). In conclusion, LEPR genotype and gut microbiome may be associated even in normal-weight Korean adults. However, further studies with a greater number of obese adults are needed to confirm whether LEPR genotype is related to gut microbiome composition.

• Journal of Korean Medicine for Obesity Research
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• v.8 no.1
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• pp.33-49
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• 2008

Objectives In order to investigate the effects of Sansayukbokhap-bang (SSYBHB) on the hematological and histological changes. Methods C57BL/6 mice were fed with high fat diet. C57BL/6 mice were divided into four groups and fed for 15weeks. Results 1. The body weight of SSYBHB intake mice was significantly lower than high fat diet group. 2. The final increase of body weight was decreased significantly. 3. The levels of ALT, AST, total cholesterol, LDL-Cholesterol, triglyceride, Leptin were decreased significantly. 4. The levels of creatinine were decreased but did not show significance. 5. The level of HDL-cholesterol and the expression of ${\beta}$3AR mRNA gene in 3T3-L1 Adipocytes were increased significantly. 6. Adipocytes' size was decreased significantly. 7. The expression of ${\beta}$3AR mRNA gene, Leptin mRNA gene and serotinin mRNA gene in Adipocytes tissue was decreased significantly. Conclusion Based on these results, it is proved that SSYBHB is effective on the therapy of obesity by referring to obese-gene and obese inhibitory. So, it is espected that the clinical application of SSYBHB can help the treatment of obesity.

• Journal of Sasang Constitutional Medicine
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• v.29 no.2
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• pp.136-153
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• 2017

Objectives This experimental study was designed to investigate the effect of Phaseolus angularis shell on metabolic syndrome. Methods Each 5 C57BL/6J mice were randomly assigned to normal diet group, high-fat diet(HFD) control group, high-fat diet plus 15.6 mg/kg/day of Orlistat(HFD-Orlistat) group, high-fat diet plus 100mg/kg/day of Phaseolus angularis shell extract(HFD-PAS_E) group. Weight, the blood chemical and hematologic parameter was med. The mRNA expression was assayed through Reverse transcriptase polymerase chain reaction(RT-PCR). Results In HFD-PAS_E group, the body weight gain, weight of liver, and the level of LDL-Cholesterol were significantly decreased and the level of HDL-Cholesterol were significantly increased. The size of adipocyte in HFD-PAS_E group was smaller than HFD group's. In HFD-PAS_E group, the expression of leptin, PPAR-${\gamma}$, AP2/FABP4 mRNA in liver adipocyte tissue was decreased, the expression of Adiponectin, UCP-2 mRNA in liver adipocyte tissue was increased and the expression of Leptin, C/EBP-a, AP2/FABP4 mRNA in epididymal adipocyte tissue was decreased. Conclusion These results suggest that Phaseolus angularis shell has inhibitory effects on metabolic syndrome by reducing the body weight and the levels of lipid contents in high-fat-diet induced obese mice.

• Journal of Sasang Constitutional Medicine
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• v.13 no.1
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• pp.79-87
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• 2001

In order to investigate the effect of Taeumjowetang and Herba Ephedrae on obesity-induced rats, after Taeumjowetang and Herba Ephedrae were administered by mouth, and then body-weight, serum triglyceride, total cholesterol, Obese mRNA and TNF-${\alpha}$/ mRNA were measured. The reselts were as follows ; 1. The body-weight was decresed with the statistical significance in both the Taeumjowetang and the Herba Ephedrae group as compared with the control group. 2. The quantitation of serum triglyceride was decresed with the statistical significance in both the Taeumjowetang and the Herba Ephedrae group as compared with the control group. 3. The total cholesterol was slightly decresed in both the Taeumjowetang and the Herba Ephedrae group as compared with the control group, but there was no statistical significance. 4. The manifestation of Obese mRNA and TNF-${\alpha}$/ mRNA in epidymal, retroperitoneal, mesenteric and skeletal muscle tissues were inhibited in Taeumjowetang and Herba Ephedrae group. According to the above results, Taeumjowerang and Herba Ephedrae were recognized to be helpful for the treatment of obesity.

• Nutrition Research and Practice
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• v.10 no.5
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• pp.487-493
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• 2016

BACKGROUND/OBJECTIVES: Turmeric (Curcuma longa L.) has been reported to have many biological functions including anti-obesity. Leptin, peptide hormone produced by adipocytes and its concentration is increased in proportion to the amount of the adipocytes. In the present study, we examined the effects of Korean turmeric on the regulation of adiposity and leptin levels in 3T3-L1 adipocytes and rats fed a high-fat and high-cholesterol diet. MATERIALS/METHODS: Leptin secretion, free fatty acid and glycerol contents in 3T3-L1 adipocytes were measured after incubation of cells with turmeric for 24 hours. Rats were divided into four experimental groups: a normal diet group (N), a high-fat and high-cholesterol diet group (HF), a high-fat and high-cholesterol diet group supplemented with 2.5% turmeric extracts (TPA group) and a high-fat and high-cholesterol diet group supplemented with 5% turmeric extracts (TPB group). Serum samples were used for the measurement of leptin concentration. RESULTS: Contents of free fatty acid and glycerol showed concentration dependent increase in response to turmeric extracts. Effects of turmeric extracts on reduction of lipid accumulation in 3T3-L1 cells were examined by Oil Red O staining. Treatment with turmeric extracts resulted in increased expression levels of adipose triglyceride lipase and hormone-sensitive lipase mRNA. The concentration of leptin from 3T3-L1 adipocytes was significantly decreased by turmeric. Proportional abdominal and epididymal fats weights of the turmeric 5% supplemented group, TPB has significantly decreased compared to the HF group. The serum levels of leptin in the TPA and TPB groups were significantly lower than those of the HF group. CONCLUSIONS: Based on these results, we suggested that Korean turmeric may contribute to the decreasing of body fat and regulating leptin secretion.

• Proceedings of the Korean Nutrition Society Conference
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• 2002.05a
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• pp.101-101
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• 2002

• Journal of Nutrition and Health
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• v.34 no.8
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• pp.865-871
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• 2001

The adipose tissue hormone leptin has been proposed to be involved in the regulation of flood intake and energy expenditure via thermogenesis by uncoupling protein(UCP) in brown adipose tissue(BAT). The objective of the study was to examine the effects of high fat diet on the serum leptin levels, BAT UCPl expression and the body fat mass in rats after weaning. During experimental period of 12 weeks, 4 male Sprague-Dawley rats were killed for the baseline experiment at 4 weeks of age while the remaining rats were fed the two different diets: the control diet AIN-76A(n = 20), high fat(beef tallow) diet(n = 20) ad libitum, which provided 11.7% or 40% of calories as fat, respectively. At 16 weeks of age, the increase in the food efficiency ratio(FER) was related to fat mass in rats on high fat diet. Serum leptin level was increased by age and dietary high fat. There was no difference in serum insulin level between groups until 10 weeks of age, but rats fed high fat diet for 12 weeks showed hyperinsulinemia. The amount of body fat pads was increased significantly in high fat group compared to normal diet group. Visceral fat mass affected acutely by high fat diet, as a result, it was higher in rats fed high fat diet for 2 weeks than normal diet. At 16 weeks of age, BAT and visceral fat mass were significantly high in high fat group. Also, the serum leptin levels reflected the amount of body fat mass. BAT UCPI mRNA expression increased with age and dietary high fat. This study demonstrates that dietary high fat increased serum leptin levels, BAT UCPI expression and body fat mass. Futhermore, in rats fed high fat diets, the increases in leptin and UCPI expression counteracts only in part the excess adiposity and obesity.

• Korean Journal of Animal Reproduction
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• v.24 no.4
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• pp.419-428
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• 2000

Leptin, the product of obese (ob) gene, is an adipocyte-derived satiety factor that plays a major role in the regulation of food intake, energy homeostasis, body weight, reproductive physiology and neuropeptide secretion. The present study was designed to generate transgenic mice expressing antisense mouse ob (mob) gene. Total RNA was extracted from the adipose tissues of mouse, then reverse transcription was performed. The 303 and 635 bp fragments of anti I and II cDNAs were amplified from mob cDNAs by PCR. The two mob cDNAs were reversely ligated into between adipose tissue specific aP2 promote and SV40 poly(A) site. Transgenic mice carrying two different kinds of antisense mob transgenes were generated by DNA microinjection into pronucleus. Total 14 transgenic mice were born, and the 4 and 5 founder lines of the transgenic mice with anti I and II transgenes were respectively established. Antisense mRNA expression was detected in transgenic F$_1$ mice by RT-PCR analysis. This result suggests that the transgenic mice expressing antisense mob mRNA may be useful as an animal disease model to be obesity caused by decreased amount of leptin secretion.