Homocysteine, insulin, vitamin B12 and folic acid levels in obese children

비만아에서 혈청 호모시스테인, 인슐린, 비타민 B12, 엽산 농도에 대한 연구

  • Park, Jee Yoon (Department of Pediatrics, Ewha Womans University, College of Medicine) ;
  • Hong, Young Mi (Department of Pediatrics, Ewha Womans University, College of Medicine)
  • 박지윤 (이화여자대학교 의과대학 소아과학교실) ;
  • 홍영미 (이화여자대학교 의과대학 소아과학교실)
  • Received : 2005.12.09
  • Accepted : 2006.03.02
  • Published : 2006.05.15

Abstract

Purpose : As the prevalence of childhood obesity is increasing, hypertension, hyperlipidemia, insulin resistance and diabetes mellitus have become problems. High homocysteine levels and low vitamin $B_{12}$ supplementation are acknowledged to have a role in coronary artery disease, but there are few studies on homocysteine, insulin and vitamin $B_{12}$ levels in obese children. We aimed to study whether homocysteine, insulin, vitamin $B_{12}$, folic acid levels could have any difference and relation in obese children. Methods : The disease group consisted of 27 children from 8 to 11 years old, whose obesity index was over 130. The control group consisted of 30 healthy children of the same age group. Obesity index and body mass index were calculated by height and body weight of the children, and their systolic and diastolic blood pressures at resting state were checked. Total cholesterol, triglyceride, homocysteine, insulin, vitamin $B_{12}$, folic acid levels were studied after 10 hours of fasting. Intracellular fluid, extracellular fluid, protein, mineral, muscle mass, lean body fat, fat mass and fat percentages were checked by bioelectrical impedance. Results : Homocysteine levels were higher in obese children($8.1{\pm}2.1{\mu}mol/mL$ vs. $4.9{\pm}1.0{\mu}mol/mL$). Insulin levels were also higher in obese children($26.8{\pm}11.2{\mu}IU/mL$ vs. $12.5{\pm}5.24{\mu}IUl/mL$). Vitamin $B_{12}$ was lower in obese children($798.6{\pm}174.3pg/mL$ vs. $967.8{\pm}405.0pg/mL$). But there was not a difference in the folic acid levels between the two groups. In obese children, systolic blood pressure (r=0.535), triglyceride(r=0.517), total cholesterol(r=0.408), folic acid(r=0.408), vitamin $B_{12}$(r=0.338) and abdomoanl fat %(r=0.306) had a positive correlation. Conclusion : We found definite differences of insulin, homocysteine, and vitamin $B_{12}$ plasma levels in obese children, but we need more study to use those parameters as risk factors of metabolic syndrome in pediatric obese patients.

목 적 : 소아 비만의 빈도가 점점 증가하면서 비만으로 인한 고혈압, 관상동맥 질환, 고지혈증, 인슐린 저항, 당뇨병 등의 합병증이 문제가 되고 있다. 관상동맥 질환에서 호모시스테인 치의 증가, 비타민 $B_{12}$ 섭취의 감소가 중요한 역할을 하고 있음이 보고되고 있으나, 비만에서는 아직 호모시스테인, 인슐린, 비타민 $B_{12}$에 대한 연구가 많지 않은 실정이다. 저자들은 호모시스테인, 인슐린, 비타민 $B_{12}$, 엽산이 비만아에서 어떤 연관성을 갖고 있는지를 알아보기 위하여 본 연구를 실시하였다. 방 법 : 8세부터 11세 사이에 비만도가 130 이상인 중등도 비만아 27명을 대상군으로 하였고, 같은 연령의 30명의 정상 소아를 대조군으로 하였다. 신장, 체중을 이용하여 비만도와 체질량 지수를 산출하였고, 안정된 상태에서 수축기, 이완기 혈압을 측정하였다. 10시간 이상 금식 후 총 콜레스테롤, 중성지방, 호모시시테인, 인슐린, 비타민 $B_{12}$, 엽산을 측정하였다. 생체전기저항법을 이용하여 세포내액, 세포외액, 단백질, 무기질, 근육량, 체지방량, 체지방률, 복부지방률 등을 분석하였다. 결 과 : 호모시스테인은 비만군에서 $8.1{\pm}2.1{\mu}mol/mL$$4.9{\pm}1.0{\mu}mol/mL$인 정상군보다 유의하게 높았고, 인슐린도 비만군에서 $26.8{\pm}11.2{\mu}IU/mL$$12.5{\pm}5.24{\mu}IU/mL$인 정상군보다 유의하게 높았다. 비타민 $B_{12}$는 비만군에서 $798.6{\pm}174.3pg/mL$$967.8{\pm}405.0pg/mL$인 정상군보다 유의하게 낮았다. 그러나 엽산은 두 군 사이에 유의한 차이가 없었다. 비만군에서 인슐린은 수축기 혈압(r=0.535), 중성 지방(r=0.517), 총 콜레스테롤(r=0.408), 복부지방률(r=0.306)과 양의 상관관계가 있었다. 결 론 : 비만아에서 호모시스테인, 인슐린과 비타민 $B_{12}$가 의미있는 혈중 농도 차이를 보였으나 심혈관 질환 등의 성인병을 예방하는 예측 인자로 사용할 수 있는지 알기 위해 더 많은 연구가 필요하겠다.

Keywords

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