• Journal of Nutrition and Health
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• 제40권2호
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• pp.118-129
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• 2007

This study was performed to investigate the effect of lysine-limited diets containing different levels of L-carnitine on body weight and lipid metabolism in obesity-induced adult rats. Eight-month-old male Sprague-Dawley rats (n = 90) were raised for one month with high fat diet (40% fat as calorie) to induce obesity. After induction of obesity, rats weighing 739.5 g were randomly blocked into three groups according to the body weight and raised for eight weeks with control diet (Co), 50% lysine-limited diet (-L), 50% lysine limitation with 0.3% pivalate diet (-L + P). Each of three groups was allotted to 0.0% L-carnitine (0.0% CT), 0.5% L-carnitine (0.5% CT) and 2.5% L-carnitine (2.5% CT) groups, respectively. The levels of AST, ALT, total protein and albumin in plasma were within the normal range. Daily food intake and calorie intake tended to be lower in 2.5% CT groups than those of other groups regardless lysine limitation or pivalate intake. And body weight gain and calorie efficiency ratio (weight gain (g) /calorie intake (100 kcal)) were significantly the lowest in 2.5% CT groups among all experimental groups regardless of lysine limitation or pivalate intake. The weights of perirenal, epididymal fat pads and brown adipose tissue in 2.5% CT groups were significantly lower than 0.0% CT groups. Plasma total lipid, triglyceride, total cholesterol concentrations in all groups were not significant by experimental compound. HDL-cholesterol concentrations in -L + P +2.5% CT group were highest in -L + P groups. Levels of hepatic total lipid, triglyceride and total cholesterol in 2.5% CT groups were tend to be lower those than in 0.0% CT groups regardless of dietary lysine limitation and pivalate intake. Fecal total lipid excretions of 2.5% CT groups were significantly lower than in 0.0% CT groups in all experimental groups. But fecal triglyceride excretions of 2.5% CT groups were significantly higher than 0.0% CT groups regardless of lysine limitation and pivalate. In conclusion, there was no difference on body weight and lipid metabolism by dietary lysine limitation and pivalate intake. And feeding of 2.5% L-carnitine was more effective than feeding of 0.5% L-carnitine and 0.0% L-carnitine in reduction of body weight, body fat and lipid metabolism.

• Journal of Nutrition and Health
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• 제38권8호
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• pp.637-648
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• 2005

This study was performed to investigate the effect of feeding garcinia cambogia extract (HCA) and/or L-carnitine and exercise (swimming) on body weight in rats. Forty-eight male rats (Charles River CD (SD) IGS) of eight weeks old and weighing $323.5\pm2.4g$ were raised for two months with high fat diet ($40\%$ fat as calorie) to induce obesity. After induction of obesity, rats weighing $552.8\pm5.8g$ were blocked into eight groups according to body weight and raised for six weeks with diet containing HCA and/or L-carnitine. Plasma aspartate aminotransferase, alanine aminotransferase, total protein and albumin levels were in normal ranges. Food and calorie intakes of H + C and H + C/H groups were highest among non-exercise (m) groups and exercise (I) groups. Food and calorie intakes of m groups were higher than those of I groups. E groups showed significantly lower body weight gain and calorie efficiency ratio than m groups and H/E group was the lowest among all groups. Perirenal fat pad weights of E groups were lower than m groups, and epididymal fat pad weights of H and H + C groups were lower than CO and C groups among m groups regardless of exercise treatment. Brown adipose tissue weights of I groups were higher than fn groups and highest in H/E group among all groups. Liver citrate lyase activities of H and C groups were lower than CO and H + C groups regardless of exercise treatment. The differences between NE groups and E groups were not found to be significantly. Liver carnitine acyltranferase activity was not significantly different among all groups. Fecal total lipid, triglyceride and total cholesterol excretions were found to be higher in H and H + C uoups compared to CO and C groups both in NE and E animals, those of lipid excretions of NE groups were higher than E groups. In conclusion, HCA was more effective in reduction of body weight and body fat than L-carnitine or HCA + L-carnitine. HCA ingestion with exercise was far more effective than without exercise treatment in reducing body weight and body fat.

• Preventive Nutrition and Food Science
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• 제11권3호
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• pp.210-217
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• 2006

This study was performed to investigate effects of the experimental mixture containing soybean peptides, L-carnitine and Garcinia Cambogia extract on body weight and lipid metabolism in rats. Male Sprague-Dawley rats (n=40) of eight weeks old were raised for four weeks with high fat diet (40% fat as calorie) to induce obesity. After induction of obesity, rats were feed control (C) diet, containing either 0.16% (+1D), 1.6% (+10D), 8% (+50D) of experimental mixture for eight weeks. Plasma aspartate aminotransferase (AST) and alanine aminotransferase (ALT) activity and total protein and albumin concentration were not different among groups. The Body weight gain was significantly lower in experimental mixture diet group compared to control group. Weights of perirenal fat pad and epididymal fat pad in the +50D group were significantly lower than those in the +1D and +10D groups. Plasma total lipid and liver total cholesterol levels in the experimental groups were significantly lower than those in the control group. Fecal total lipid and total cholesterol excretions were highest in +50D group. These results suggest that the experimental mixture containing peptides, L-carnitine and Garsinia Canbogia extract is effective for reducing the body weight and adipose tissue weight which may be due to the modulation of lipid metabolism and the increased fecal excretion of lipid.

• Journal of Nutrition and Health
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• 제22권4호
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• pp.223-236
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• 1989

To evaluate the differences of the levels and sources of protein intake human protein metabolism, an 26-day metabolic balance study was conducted in 10 healthy Korean adult females. In the pre-study, the subjects recorded their own diets for 3 days. The metabolic balance study consisted of 6-day adaptation period, 10-day moderate protein period(60-65g/d) and 10-day high protein period(90-95g/d). During the moderate and high protein period, 5 subjects were fed the higher animal protein meals and the other 5 subjects were fed the high plant protein meals. Body weight, nitrogen balance and blood chemistries were monitored through out the study. The urine volume were sighificantly larger in the animal protein group and, the dietary fiber and fecal weights were significantly heavier in the plant protein diet group. But no statistically significant differences were found between the two dietary groups in apparent nitrogen digestability, urinary nitrogen excretion and nitrogen balance. Body weight, serum protein, albumin and HDL-cholesterol levels were not changed, but serum total cholesterol level in the animal protein diet group was elevated significantly from 143.8mg/dl on moderate potein diet to 173.0mg/dl on high proetin diet. In conclusion, from the observation of this short-term N balance study, plant diet on the adequate level of calorie and protein intake had almost the same effect of animal protein diet for protein maintenace in adults.

• 농업과학연구
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• 제35권2호
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• pp.137-145
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• 2008

본 시험은 옥수수 주정박(corn distiller's dried grains with solubles; DDGS)의 산란계용 배합사료에 첨가시 산란계의 생산성 및 영양소 대사율, 계분의 암모니아 발생에 미치는 영향을 조사하기 위해 실시하였다. 23주령의 Hy-line Brown 계통의 산란계 216수에 DDGS를 0% 함유한 사료를 대조구(T1)로 하고, 대조구와 동에너지(TMEn 2,780 kcal/kg)-동단백질(17.0%)이 되게끔 DDGS를 각각 10%(T2), 20%(T3) 첨가한 3가지 사료를 10주간 급이하였다. 시험설계는 3처리 6반복 반복당 12수씩 완전임의 배치법을 사용하였다. 조사항목으로 사료섭취량, 산란율, 난중 및 난생산 사료요구율, 영양소대사율 및 계분의 암모니아 발생을 측정하였다. 본 시험에서 사료섭취량, 산란율, 난중 및 난생산 사료요구율 등의 산란 생산성은 모든 처리구 간에 유의적인 차이가 없었다(P>0.05). 영양소 대사율에 있어 건물의 대사율의 경우 DDGS를 첨가한 처리구들에서 유의적으로 낮게 나타났다(P<0.05). 조지방과 NDF의 대사율은 유의적인 차이가 나타나지 않았다(P>0.05). 가용무질소물의 대사율은 DDGS 첨가 수준이 높아질수록 유의적으로 낮게 나타났다(P<0.05). Ca과 P의 대사율은 DDGS 첨가구들과 대조구 사이에 유의적인 차이가 나타나지 않았다. 계분의 암모니아 발생은 DDGS 첨가수준이 높을수록 암모니아 발생이 낮게 나타났으나 유의적인 차이는 나타나지 않았다. 결론적으로 산란계사료에서 DDGS를 10~20%까지 옥수수-대두박을 대체하여 사용할 경우, 건물과 NFE 대사율을 감소시키는 효과가 있지만, 산란성적에 아무런 영향이 없이 사용할 수 있다고 판단된다.

• 생명과학회지
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• 제22권4호
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• pp.478-485
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• 2012

본 연구에서는 함초분 섭취가 지질대사에 미치는 영향을 알아보고자 하였다. 흰쥐를 일반식이 대조군(CON), 고지방식이 대조군(HFC), 고지방식이에 함초분 첨가군(HFG)로 각각 구분하여 4주간 섭취시켰다. 체중은 HFG가 HFC에 비하여 9% 정도 낮았다. 분변칼로리 분석을 한 결과, HFG의 지방량(CON에 비하여 120%, HFC에 비하여 138)과 분변 칼로리(약 110%)가 높은 것으로 나타났다. 혈중 중성지방과 LDL-C는 HFG가 HFC에 비하여 낮았으며(각각 71.8% 및 58%), HDL-C는 HFG가 HFC에 비하여 152% 높았다. 간의 FABP 발현은 HFG가 HFC보다 197% 높았으며, CPT-1 역시 동일한 경향을 보였다. 이러한 결과는 함초분 섭취가 체중의 증가를 억제하였고, 간세포 수준에서의 지방대사를 개선하였다는 점을 시사한다. 이러한 결과를 함초분이 소화관에서의 지방흡수를 억제함으로써 항비만 효과를 가지는 것으로 제안하고자 한다.

• Journal of Nutrition and Health
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• 제14권4호
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• pp.209-219
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• 1981

To evaluate long-term metabolic response of free-living Korean subjects consuming local sources adequately or slightly below habitual intake. Subjects, six male medical students aged 23-25 years were free-living, but consumed diets in the metabolic unit. They were healthy as determined from medical laborarory tests. They belong to the Korean middle-class. Temperature of outdoor during study were ranged between -2 to $26^{\circ}C$, whereas the indoor were $18-22^{\circ}C$. Animal protein ranged between 25-30% of total calorie. The three meals and a vitamin supplement to meet recommendation were given daily. Three 50day periods following the design were used to test the protein-energy adequacy of the diet. Urinary nitrogen excretion was measured daily. Fecal samples were pooled for the last 5 days of each week. Nitrogen balance was computed using 5mg N/Kg skin and miscellaneous losses. Body weight was measured daily. The study was covered on 126 metabolic observations weekly. Body weight changes were relatively stable with the energy intake of 37-44Kca1/kg, and N-balances were also relatively stable, but it was influenced by physical and or mental stress somehow. It could be assumed that the mean protein and energy requirement were $190{\pm}10mg$ N/Kg with $41{\pm}2$ Kcal/kg, and the mean digestibility of protein was 81% on these subjects with the experimental conditions. The protein requirement, however, could be cut down somewhat with some limited increaing of energy intake under parameters of N-balance and maintaining body weight. It was also observed a tendency of the requirement were getting smaller with the increase of body size.

• 한국식생활문화학회지
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• 제20권2호
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• pp.194-203
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• 2005

This study was peformed to investigate effect of feeding experimental mixture containing chitosan, hibiscus extract and L-carnitine on body weight and lipid metabolism in rats. Forty-eight male rats(Charles River CD) of eight weeks old and weighing $336.5{\pm}2.3g$ were raised for five weeks with high fat diet(40% fat as calorie) to induce obesity. After induction of obesity, rats weighing $560.4{\pm}5.6g$ were blocked into four groups according to body weight and raised for eight weeks with diet containing either 0.09%(+1D group), 0.9%(+10D group) or 4.5%(+50D group) of experimental mixture. Aspartate aminotransferase(AST) and alanine aminotransferase(ALT), total protein and albumin were normal levels in plasma. Body weight gain and epididymal fat pad weight were lower in experimental mixture groups than control group However, weights of perirenal fat pad and brown adipose tissue were not significantly different among all groups. There was no significant difference in plasma and hepatic lipid levels among all groups. Liver citrate lyase and camitine acyltransferase activities were not significantly different among all groups, however, citrate lyase activity was tended to be decreased with increasing experimental mixture level in diet. Fecal total lipid and total cholesterol excretions were highest in +50D group, and triglyceride excretion was highest in +1D group. in conclusion, intake of experimental mixture containing chitosan, hibiscus extract and L-camitine was effective in reducing body weight and body fat, and its inhibitory effects might lead to obesity improvement.

• 한국식품영양과학회지
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• 제36권12호
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• pp.1537-1543
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• 2007

본 연구에서는 포도씨열수추출물을 이용하여 고지방식이로 비만을 유도한 마우스의 지질대사 및 적혈구의 항산화방어계에 미치는 영향을 살펴보았다. 4주령의 C57BL/6 마우스(n=24)를 1주일간 적응시킨 후 정상식이를 급여한 정상군, 고지방(열량의 37%를 지방으로 대체)을 급여한 고지방대조군과 고지방-포도씨열수추출물군으로 나누어 6주간 사육하였다. 포도씨열수추출물은 1%수준으로 식이에 첨가하였으며 동일한 열량, 질소량 및 섬유소가 함유되도록 조제하여 급여하였다. 고지방식이는 정상식이에 비하여 체중, 일일 열량섭취량, 백색지방 무게, 혈장과 간조직의 지질함량 및 혈장 leptin 함량을 유의적으로 증가시켰다. 본 실험에서 첨가된 식이 1%의 포도씨열수추출물 보충은 고지방을 급여한 마우스의 체중과 장기무게에는 영향을 미치지 않았으나, 혈장의 중성지질과 간조직의 콜레스테롤 함량을 현저히 저하하는 것으로 나타났다. 특히, 혈장 중의 중성지질은 포도씨열수추출군에서 정상수준으로 개선되었으며, 포도씨열수추출물은 변으로 중성지질 배설을 고지방대조군에 비하여 유의적으로 높였다. 간조직의 지질대사 효소인 FAS, ${\beta}$-oxidation, CPT 활성은 고지방대조군에서 정상군에 비하여 유의적으로 낮았으나 포도씨열수추출물군의 CPT 활성은 고지방대조군에 비하여 유의적으로 높았고, ${\beta}$-oxidation 활성도 증가경향을 보였다. 또한 적혈구의 SOD와 GSH-Px 활성이 포도씨열수추출물 급여시 활성화될 뿐만 아니라 고지방식이로 유도한 비만마우스의 적혈구내 지질과산화물 함량이 유의적으로 낮아졌다. 이와 같이 포도씨열수추출물은 고지방 섭취시 혈 중 지질개선 및 항산화제로서의 가능성을 제시하였다.