Clinical and Experimental Pediatrics

The Korean Pediatric Society (대한소아청소년과학회)
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The Relation between Obesity and Glomerular Filtration Rate in Children and Adolescents

소아 및 청소년에서 비만과 사구체여과율과의 관계

  • Jung, Youngsu (Department of Pediatrics, College of Medicine, Chungang University) ;
  • Kim, Dongwoon (Department of Pediatrics, College of Medicine, Chungang University) ;
  • Lim, Inseok (Department of Pediatrics, College of Medicine, Chungang University)
  • 정영수 (중앙대학교 의과대학 소아과학교실) ;
  • 김동운 (중앙대학교 의과대학 소아과학교실) ;
  • 임인석 (중앙대학교 의과대학 소아과학교실)
  • Received : 2005.08.01
  • Accepted : 2005.08.26
  • Published : 2005.11.15
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Abstract

Purpose : The prevalence of obesity in children and adolescents has been rising rapidly in Korea because of changes of diet and lifestyle. As with adults, obesity in children and adolescents can cause diabetes mellitus, hyperlipidemia, cardiovascular diseases and renal diseases. The aim of the present study is to examine the relation of obesity, glomerular filtration rate(GFR) and serum cystatin C concentration in children and adolescents. Methods : Data of 115 children and adolescents aged between 6 years and 20 years without clinical evidence of renal diseases were included in the study. From May 2004 to December 2004, blood samples were collected from children and adolescents who were seen at the Department of Pediatrics at Chungang University Yongsan Hospital. Obesity degrees and body mass indices(BMI) were measured, and GFRs were estimated from Schwartz's formula. Serum cystatin C was measured by particle enhanced nephelometric immunoassay using Behring Nephelometer II. Results : GFRs were significantly different between the obese group(BMI >95 percentile, $145.79{\pm}23.10mL/min$) and the non-obese group(BMI <95 percentile, $134.61{\pm}26.19mL/min$) divided by BMI (P=0.031). GFRs were not significantly different between the obese group(obesity degree >120 percent, $144.29{\pm}23.08mL/min$) and the non-obese group(obesity degree <120 percent, $134.54{\pm}26.57mL/min$) divided by obesity degree(P=0.051), but were significantly different between severe obese group (obesity degree >150 percent, $155.55{\pm}20.40mL/min$) and the non-obese group(P=0.004). GFRs were correlated positively with BMI($r^2=0.037$, P=0.039), but were not correlated significantly with obesity degree($r^2=0.030$, P=0.066). Serum cystatin C concentrations were not significantly different between the obese group and the non-obese group, divided by BMI as well as by obesity degree(P>0.05). Conclusion : Obesity may lead to an alteration of renal hemodynamics such as hyperfiltration, appropriate control and management for obesity is necessary.

목 적 : 최근 소아 및 청소년의 비만이 빠르게 증가하고 있다. 고도 비만아들에서 단백뇨 및 FSGS가 발현될 수 있고, 그 기전으로 과여과, 신정맥압 증가, 사구체비대, 고지혈증, angiotensin II, insulin, leptin, $TGF-{\beta}1$의 합성 증가 등이 보고되고 있다. 본 연구에서는 BMI와 비만도에 따른 GFR의 변화를 조사하여 과여과 여부를 알아보았고, 혈청 cystatin C 농도를 측정하여 비만과의 상관관계와 유용성을 알아보고자 하였다. 방 법 : 2004년 5월부터 12월까지 중앙대학교 용산병원을 방문하여 혈액검사를 시행받은 6세 이상의 환아들 중에서 임상적으로나 검사상으로 명백한 신질환의 증거가 없는 115명의 환아들을 대상으로 BMI와 비만도를 측정하였고, Schwartz's formula로 GFR을 추정하였다. 혈청 cystatin C 농도는 particle enhanced nephelometric immunoassay를 이용하여 Behring Nephelometer II로 측정하였다. 결 과 : GFR은 BMI로 구분한 경우 비만군이 정상군에 비해 유의하게 높았다. GFR은 비만도로 구분한 경우에는 비만군과 정상군 사이에 유의한 차이를 보이지 않았지만 고도 비만군은 정상군에 비해 유의하게 높은 값을 나타내었다. BMI와 GFR은 양의 상관관계를 보였으나, 비만도와 GFR은 유의한 상관관계를 보이지 않았다. 혈청 cystatin C 농도는 BMI로 구분한 경우와 비만도로 구분한 경우 모두 비만군과 정상군 사이에 유의한 차이를 보이지 않았고, BMI나 비만도와 통계학적으로 유의한 상관관계를 나타내지 않았다. 결 론 : 비만으로 인해 과여과와 같은 신기능의 변화가 초래되고 단백뇨 및 FSGS와 같은 신병증이 발현될 수 있으므로 비만에 대한 적절한 관리와 치료가 필요할 것으로 생각된다.

Keywords

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