비만 소아의 혈중 아디포넥틴과 인슐린저항성에 관한 연구 = Serum Adiponectin Levels and Insulin Resistance in Obese Children

다국어 초록 (Multilingual Abstract)

Purpose:Adiponectin, adipose tissue-specific protein, has anti-inflammatory and anti-atherogenic properties. It has been found to have a negative correlation with obesity and to play a role in modulating glucose tolerance and insulin sensitivity. Serum adiponectin concentrations are decreased in adults with obesity and type 2 diabetes. We investigated the difference in adiponectin levels between obese and non-obese children, and evaluated the relationship of serum adiponectin with body mass index(BMI), serum fasting insulin, lipid profiles and homeostasis model assessment(HOMA) in children.
Methods:We measured serum adiponectin levels by radioimmunoassay in 113 children(82 obese children and 31 non-obese controls) from 8 to 15 years of age, and also checked BMI, fasting serum glucose, insulin and lipid profiles. Fasting and postprandial serum adiponectin concentrations were compared by oral glucose tolerance tests in 27 obese children. The correlations of adiponectin with BMI, insulin, low density lipoprotein(LDL)-cholesterol and HOMA were analyzed by Pearson's correlation.
Results:The serum adiponectin levels were significantly lower in the obese group(19.7 mg/mL) than in the non-obese group(27.5 mg/mL)(P<0.01). Serum adiponectin concentrations were negatively correlated with BMI(r=-0.39, P<0.01), serum insulin(r=-0.28, P<0.01), LDL-C(r=-0.20, P<0.01) and HOMA(r=-0.22, P<0.01). At oral glucose tolerance tests in obese children, postprandial 2 hours adiponectin level(19.8 mg/mL) was decreased compared to fasting level(25.8 mg/mL)(P<0.01).
Conclusion:Serum adiponectin concentrations were inversely related to adiposity and insulin resistance in children. We suggest the serum adiponectin level could be used as an early marker of insulin resistance in obese children.

국문 초록 (Abstract)

목 적 : 식생활과 생활양식의 서구화로 인하여 우리나라도 비만의 유병률이 급격히 증가하는 추세이며 특히 소아비만은 이미 소아기에 합병증 발생의 위험과 더불어 성인비만으로 이행될 가능성이 크기에 이에 대한 관심이 날로 높아지고 있는 추세이다. 아디포넥틴은 최근 발견된 지방세포에서 분비되는 adipocytokine으로 비만에서 아디포넥틴의 감소가 인슐린저항성과 동맥경화증의 발병과 관련이 있는 것으로 알려져 있다. 본 연구는 비만아와 정상 체중아의 혈중 아디포넥틴 농도의 차이와 체질량지수(BMI) 및 인슐린저항성과의 상관관계를 알아보고자 하였다.방 법 : 2003년 1월부터 2003년 6월까지 BMI가 95 백분위 이상인 8-15세 사이의 비만아 82명(남아 54명, 여아 28명)과 대조군으로 정상 체중아 31명(남아 21, 여아10), 총 113명을 대상으로 신체계측을 하고 공복 후 채혈하여 혈중 아디포넥틴, 인슐린, 혈당 농도를 측정하였다. 혈중 아디포넥틴 농도를 비만여부와 사춘기 시기별로 비교하였으며 아디포넥틴과 체질량지수, 인슐린, HOMA 등과의 상관관계를 알아보았다.

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