• 대한한의학회지
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• 제20권1호
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• pp.66-74
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• 1999

It is known that obesity is associated with chronic adult disease including stroke. However the relationship between stroke and obesity has not been discussed sufficiently, The purpose of this study was to confirm whether the serum Leptin levels related to BMI and these were associated with serum lipid levels and other risk factors in stroke patients. The subjects were 68 stroke patients(male 36. female 32) hospitalized in the Department of Circulatory Internal Medicine, College of Oriental Medicine, Kyung Hee University, Seoul. Obesity was shown in 16 patients(24%) whose BMI were above 25. and in 15 patients(22%) who represented higher values than normal in serum Leptin levels. BMI correlated with serum Leptin level(p=0.04), with Triglyceride(p=0.019) and with Total lipid(p=0.001) significantly. Meanwhile serum Leptin levels significantly correlated with Total cholesterol(p=0.013) only. BMI in the group with a history of smoking was significantly lower than that of the non-smoking group(p=0.01). Serum Leptin levels were higher in the group with Hypertension than the non-Hypertension group(p=0.026), lower in the non-Drinking group(p=0.006) and the smoking group(p=0.001) than the drinking group and the non-smoking group. respectively. So we concluded that BMI significantly correlates with serum Leptin levels and serum lipid levels in stroke patients.

• Nutrition Research and Practice
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• 제10권4호
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• pp.411-417
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• 2016

BACKGROUND/OBJECTIVES: Metabolic syndrome (MetS) is a set of interrelated metabolic risk factors that increase the risk of cardiovascular morbidity and mortality. Studies regarding the specificity and sensitivity of serum levels of leptin and uric acid as predictors of MetS are limited. The aim of this study was to evaluate the serum levels of leptin and uric acid in terms of their specificity and sensitivity as predictors of MetS in the studied Jordanian group. SUBJECTS/METHODS: In this cross sectional study, 630 adult subjects (308 men and 322 women) were recruited from the King Hussein Medical Center (Amman, Jordan). The diagnosis of MetS was made according to the 2005 International Diabetes Federation criteria. Receiver operating characteristic curves were used to determine the efficacy of serum levels of leptin and uric acid as predictors of MetS in the studied Jordanian group. RESULTS: Study results showed that for identification of subjects with MetS risk, area under the curve (AUC) for leptin was 0.721 and 0.683 in men and women, respectively. Serum uric acid levels in men showed no significant association with any MetS risk factors and no significant AUC, while uric acid AUC was 0.706 in women. CONCLUSION: Serum leptin levels can be useful biomarkers for evaluation of the risk of MetS independent of baseline obesity in both men and women. On the other hand, serum uric acid levels predicted the risk of MetS only in women.

• Asian-Australasian Journal of Animal Sciences
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• 제21권2호
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• pp.161-166
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• 2008

To determine if body weight change is directly related to altered leptin and neuropeptide Y (NPY) gene expression, we assessed adipose tissue weight, percent body fat, leptin and NPY mRNA levels and serum leptin concentration in pigs at weights of 1, 20, 40, 60, and 90 kg. The results indicated that the weight of adipose tissues and the percent body fat of pigs significantly increased and correlated with body weight (BW) from 1 to 90 kg (p<0.01). Serum leptin concentrations and leptin mRNA levels in omental adipose tissue (OAT) increased from 1 to 60 kg, and then decreased from 60 to 90 kg. At 60 kg, the serum leptin concentration and leptin mRNA level significantly increased by 33.5% (p<0.01) and 98.2% (p<0.01), respectively, as compared with the levels at 1 kg. At 60 kg, the amount of leptin mRNA in subcutaneous adipose tissue (SAT) was significantly higher than that of 1 and 40 kg animals (p<0.05). NPY gene expression in the hypothalamus also changed with BW and at 60 kg the NPY mRNA level significantly decreased by 54.0% (p< 0.05) as compared with that in 1 kg. Leptin mRNA in OAT was correlated with serum leptin concentrations (r = 0.98, p<0.01), body weight (r = 0.82, p<0.05) and percent body fat (r = 0.81, p<0.05). This is the first report of the developmental expression of leptin in porcine OAT, peritoneal adipose tissue (PAT) and SAT, and proves that the expression of leptin in OAT could reflect the levels of circulating leptin. These results provide some information for nutritional manipulation of leptin secretion which could lead to practical methods of controlling appetite and growth in farm animals, thereby regulating and improving efficiency of lean meat production and meat production quality.

• 대한지역사회영양학회지
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• 제19권1호
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• pp.12-26
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• 2014

The purpose of this study was to investigate the relationships among serum adiponectin, leptin and vitamin D concentrations and the metabolic syndrome in Korean farmers. 105 (26 males, 79 females) farmers (39~78 years, mean age $59.4{\pm}9.6$ years) in Gangwon - area were included in this study. Anthropometric measurements and biochemical blood analysis of subjects were carried out. The prevalence of obesity, abdominal obesity, hypertension, diabetes, hypertriglyceridemia, hypercholesterolemia and hyper LDL-cholesterolemia, metabolic syndrome were 51.9%, 65.7%, 49.5%, 15.3%, 17.3%, 13.5%, 11.5% and 40.9%, respectively. Serum adiponectin and leptin levels ($8.90{\mu}g/ml$ and 12.6 ng/ml) of females were significantly higher than those ($6.49{\mu}g/ml$ and 4.88 ng/ml) of males. But there was no significant difference in 25(OH)vitamin D concentration between males (15.4 ng/ml) and females (16.9 ng/ml). In the subjects with metabolic syndrome, the adiponectin levels were significantly lower and leptin levels were significantly higher than those of the subjects without metabolic syndrome. Serum adiponectin level had positive correlations with HDL-cholesterol level (r = 0.325, p < 0.001), but showed negative correlations with triglyceride and fasting blood glucose concentrations, body weight and waist/hip circumference ratio (r = -0.202 ~ -0.317, p < 0.05). Serum leptin and 25(OH)vitamin D concentrations were positively correlated with body fat (kg, %) and BMI, waist and hip circumferences (r = 0.244 ~ 0.682, p < 0.001). The results of this study suggested that adiponectin and leptin levels could be credible indices to predict chronic diseases in farmers. However, further research on vitamin D should be carried out considering another factors.

• Journal of Nutrition and Health
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• 제40권8호
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• pp.736-744
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• 2007

과천에서 진행되고 있는 소아 코호트의 1차년도와 2차년도 조사에 모두 참여했던 소아 375명(남아 : 195명, 여아 : 180명)을 연구 대상으로 leptin 수준을 삼분위수로 나누어 leptin 수준에 따른 신체조성 성분 변화를 관찰한 결과에 대한 요약은 다음과 같다. 1) 1차년도 비만 유병률은 남학생이 경도비만 8.7%, 중등도 비만 3.6%였고, 여학생은 경도비만이 1,7%로 관찰되었다. 2) 1, 2차년도의 비만지수(OI), BMI, 허리둘레 수치와 2차년도 leptin, 체지방률, 체지방량 수치들 상호간의 관계를 보았을 때, 남학생의 혈중 leptin 수준과 신체지수와의 관계는 체지방량, 체지방률, BMI 허리둘레, 제지방량의 순으로 양의 상관관계를 보였으며, 특히 leptin의 농도가 높을수록 현재의 체중, 체질량지수, 비만도, 허리둘레, 체지방률이 높았다(p<0.001). 이는 여학생의 경우에도 유사한 상관관계를 나타냈다. 3) leptin과 지방섭취량, 탄수화물 섭취량과의 관계는 유의적인 상관관계를 보이지 않았다. 4) 혈중 leptin 수준을 삼등분하여 그 수준이 최상위 삼분위에 포함되는 어린이 집단의 비만 유병률은 남 34.3%, 여 5% 이었으나 최하위군 에서는 0%이었다. 최상위군의 경우 1년 전의 비만유병률도 유사하였다(남 34.3%, 여 5%). 이상의 결과를 종합해보면 소아의 leptin 수준은 현재의 비만도를 반영할 수 있을 뿐 아니라, 1년 전의 비만상태도 예측이 가능하다. 비만도가 높은 소아의 경우 적극적 개선이 행해지지 않으면 체중 및 비만상태가 1년간 지속되므로 대사증후군 및 심혈관계 질환의 위험이 증가될 것으로 판단되며 이들을 조기에 예측, 관리하는 체계가 필요하다.

• Journal of Gastric Cancer
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• 제8권4호
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• pp.176-181
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• 2008

목적: 지방세포에서 분비되는 렙틴은 식이 조절과 에너지 소비를 통해 체질량의 항상성을 유지할 뿐만 아니라 세포증식을 조절하여 종양의 진행에서도 중요한 역할을 한다. 위암에서 렙틴과 그 수용체가 높게 발현된다고 보고되고 있으나 조직내 발현과 혈장내 렙틴 레벨과의 상관관계에 대해서는 많이 알려져 있지 않다. 본 연구에서는 위암 환자에서 혈청 렙틴 레벨을 측정하고 조직내 렙틴과 렙틴수용체의 발현과의 상관 관계를 알아보고자 하였다. 대상 및 방법: 본원에서 2005년 10월부터 2007년3월까지 위암으로 근치적 위절제술을 시행 받은 사람 중에서 파라핀 포매 보관상태가 양호한 72명을 대상으로 하였다. 면역측정법을 이용하여 혈청 렙틴 레벨을 측정하였고 위암 조직내 렙틴과 렙틴 수용체의 발현상태는 면역조직화학 염색을 시행하여 확인하였으며 임상병리학적 특성과의 연관성을 분석하였다. 결과: 체질량지수가 높은 환자의 혈청내 렙틴 레벨이 높았으며(P=0.01), 렙틴의 혈청 레벨은 Helicobacter pylon (H. pylori) 감염군에서 감소하였다(P=0.008). 위벽 침윤도와 병기가 증가할수록 렙틴 발현율이 높았으며(P=0.014), 렙틴 수용체의 발현은 장형 71.4%, 미만형 28.6%로 장형인 경우에 높았다(P=0.033) 결론: 위암에서 혈청 렙틴과 조직내 렙틴 발현은 상관관계가 없었고 렙틴의 조직내 발현은 병기와 연관이 있었으나 그 작용 기전을 규명하기 위해서는 앞으로 후속적인 연구가 필요할 것으로 생각된다.

• 대한한의학회지
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• 제24권4호
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• pp.1-5
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• 2003

Leptin has a close correlation with obesity, which is known to be a major factor for stroke. This study was performed to determine whether serum leptin level would be an independent risk factor for stroke and whether it would change significantly early after stroke. Subjects were selected from those within I month after onset and non-stroke referents at Kyung Hee Oriental Medical Center in Seoul, Korea. We compared leptin and the other characteristics between stroke subjects and referents. Body mass index, hypertension history, presence of drinking and smoking, waist/hip ratio, total cholesterol and triglyceride were recorded. To assess odds ratio of leptin for stroke, we used logistic regression analysis. Leptin was rechecked 2 weeks later and compared with the former value in acute stroke subjects. In this study, serum leptin did not differ significantly between stroke subjects and referents, and its odds ratio was not significant in male (OR=0.52, 95％ Cl; 0.13-2.08) and female (OR=1.57, 95％ Cl; 0.53-4.67). In acute stroke subjects, leptin did not change significantly 2 weeks later. Hypertension had a significant odds ratio in male (OR=3.39, 95％ Cl; 1.02-11.24) and female (OR=12.37, 95％ Cl; 3.67-41.65). High waist/hip ratio was only in female (OR=6.70, 95％ Cl; 1.73-26.02). In conclusion, leptin was not an independent risk factor for stroke and its serum level did not change significantly early after stroke. Hypertension and waist/hip ratio had significant relative risks.

• 동의생리병리학회지
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• 제17권3호
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• pp.798-803
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• 2003

The effects of acupuncture and moxibustion at ST 36 (足三理) acupoint on the changes of body weight, related serum lipids and leptin density of the stomach were investigated. 3 groups of male, 7 animals each, were ad libitum standard diet for 5 days. Body weight was effective decreased for 5 days after moxibustion at ST 36 acupoint and the density of leptin which was related food intake and body weight deficiency was decreased remarkerbly in the mucosa of stomach. Moxibustion on ST 36 affected the levels of total cholesterol, glucose, HDL-cholesterol, but acupuncture on ST 36 affected only the levels of total lipid, triglyceride, HDL cholesterol. It is considered that the treatments of acupuncture and moxibustion at ST 36 (足三理) have different effect actively on body weight, serum lipids and leptin density and moxibustion of ST 36(足三理) can be applied as effective therapy for obesity.

• 대한수의학회지
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• 제54권3호
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• pp.165-169
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• 2014

The present study compared leptin, adiponectin, and thyroid hormone concentrations in normal and obese dogs, and evaluated the association between leptin and adiponectin concentrations and thyroid function. The serum leptin, adiponectin, thyroid-stimulating hormone (TSH), total thyroxine (tT4), free thyroxine (fT4), triiodothyronine (T3), and cortisol concentrations were measured in 18 normal dogs (body condition score [BCS]: 4-5/9) and 16 obese dogs (BCS: 8-9/9). Leptin and T3 concentrations were higher in the obese group than the normal weight group (p < 0.01 and p < 0.05, respectively). In both groups, the T3 and leptin concentrations were correlated (r = 0.370, p < 0.05), as were the TSH and fT4 and adiponectin concentrations (r = -0.373, p < 0.05 and r = 0.369, p < 0.05, respectively). In the normal weight group, the TSH and fT4 concentrations were correlated with the adiponectin concentrations (r = -0.528, p < 0.05 and r = 0.482, p < 0.05, respectively). The results of the present study suggest that leptin and T3 concentrations are significantly higher in obese dogs than normal weight dogs, and the serum T3 and leptin concentrations are positively correlated.

• Journal of Nutrition and Health
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• 제33권1호
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• pp.42-48
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• 2000

The study was designed to observe the effect of complete listing for 10 days on body fatness, serum leptin level and lipid profile in thirty women who were admitted to fasting Clinical Program in Kyung-Hee Oriental Medical Center. Most of the subjects had food habits of over-eating and preferred oily foods which was correlated to the increase of body weight and BMI during realimentation. Average loss of body weight was 7.98kg and waist-hip ratio was significantly decreased during fasting. Body weight showed significant positive correlation with body fat(r=0.8182), lean body mass(r=0.7797) and total body water(r=0.7563). Body fat was gradually reduced after 9 days fasting, but lean body mass was not diminished any more after 7 days luring. Serum leptin level was significantly decreased after luring and re-feeding. The leptin showed significant positive correlation with body weight(r=0.9324), body mass index(r=0.8279) and body fat(r=0.8376). The levels of serum total cholesterol and LDL-C were significantly increased but HDL-C level was significantly decreased after fasting which increased could be harmful for persons with hypercholesterolemia. VLDL-C and triglyceride levels were not significantly decreased after fasting. Serum total free fatty acid level was significantly increased after fasting. These data suggest that the best way of maintaining the reduced body weight was to carry out the modification of food habits and behavior in daily lift. It could not be recommended to repeat often complete luting for reduction of body weight. (Korean J Nutrition 33(1) : 42-48, 2000)