아동의 PPARGC1A 유전자형(Gly482Ser)과 신체활동, 비만지표, 대사성위험인자와의 연관성
Relationships of the PPARGC1A genotypes with physical activity, body fatness and metabolic risk factors in children.
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초록
본 연구의 목적은 peroxisome proliferator activated receptor–γ coactivator–1α (PPARGC1A) 유전자의 Gly482Ser 단일염기다형성(SNP)이 아동의 비만지표와 대사성위험인자에 미치는 영향을 검정하는 것으로 하였다. 경기도 지역 초등학생 283명(남=150, 여=133, 연령：8-12세)을 대상으로 하였으며, PPARGC1A유전자 Gly482Ser SNP 분석은 TaqMan probe를 이용한 allelic discrimination assay법을 이용하였다. 측정변인으로는 신체활동량과 비만지표(체중, 신장, 체질량지수, 체지방율, 허리·엉덩이 둘레비율) 그리고 대사성위험인자(혈압, 총 콜레스테롤, 고밀도지단백콜레스테롤, 중성지방, 혈당, 인슐린, 호마지수)로 하였으며, Gly482Ser SNP(Gly482Gly, Gly482Ser, Ser482Ser)에 따른 모든 측정변인들의 차이를 검정하기 위해 일원분산분석법과 bonferroni 사후검정을 이용하였다. 본 연구 결과, Ser482Ser 집단이 Gly482Gly 및 Gly482Ser 집단에 비해 체중(p=.016), 체지방율(p=.009), 엉덩이 둘레(p=.038) 그리고 체질량지수(p=.090)가 유의하게 높은 것으로 나타났다. 결론적으로, PPARGC1A 유전자의 Gly482Ser SNP 중 Ser482Ser 유전자형을 가진 아동은 비만에 대한 위험이 상대적으로 높은 것으로 판단되기에 비만 예방을 위한 더 많은 관리와 노력이 필요할 것으로 생각된다.
Abstract
The purpose of the study was to investigate the genetic effect of the PPARGC1A gene on body fatness and metabolic risk factors in Korean children. A single nucleotide polymorphism (SNP) of Gly482Ser(rs8192678) in the PPARGC1A gene was genotyped by using a Taqman assay in a total of 283 children (boys=150 & girls=133, aged 8 to 12 years) who were recruited from local elemental schools. Primary outcomes of the study included body composition parameters including weight, height, body mass index, waist circumference, percent body fat and waist-to-hip ratio and metabolic risk factors including resting blood pressures, triglycerides, total cholesterol, high-density lipoprotein cholesterol, fasting glucose, insulin and homeostasis assessment model of insulin resistance(HOMA-IR). One-way ANOVA followed by bonferroni post-hoc tests was used to test any significant associations between the measured variables and genotype at a statistical significance of p=.05. The Ser482Ser genotype had significantly higher values in body weight (p=.016), percent body fat (p=.009), hip (p=.038) and body mass index (p=.090) than either the Gly482Gly or Gly482Ser genotype. The findings of the study suggest that the Ser482Ser genotype might play as a predisposed risk for obesity in Korean children.
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