S-Space College of Medicine/School of Medicine (의과대학/대학원) Internal Medicine (내과학전공) Journal Papers (저널논문_내과학전공)
Implication of genetic variants near TCF7L2, SLC30A8, HHEX, CDKAL1, CDKN2A/B, IGF2BP2, and FTO in type 2 diabetes and obesity in 6,719 Asians
- Issue Date
- American Diabetes Association
- Diabetes. 57(8):2226-2233
- Adult ; Aged ; Alleles ; Asian Continental Ancestry Group/*genetics ; Cation Transport Proteins/genetics ; Cyclin-Dependent Kinase 5/genetics ; Cyclin-Dependent Kinase Inhibitor p15/genetics ; Cyclin-Dependent Kinase Inhibitor p16/genetics ; Diabetes Mellitus, Type 2/ethnology/*genetics ; Female ; Gene Frequency ; Genetic Predisposition to Disease/ethnology/genetics ; Genotype ; Homeodomain Proteins/genetics ; Hong Kong/epidemiology ; Humans ; Korea/epidemiology ; Male ; Middle Aged ; Obesity/ethnology/*genetics ; RNA-Binding Proteins/genetics ; TCF Transcription Factors/genetics ; Transcription Factors/genetics ; Polymorphism, Single Nucleotide
- OBJECTIVE: Recent genome-wide association studies have identified six novel genes for type 2 diabetes and obesity and confirmed TCF7L2 as the major type 2 diabetes gene to date in Europeans. However, the implications of these genes in Asians are unclear. RESEARCH DESIGN AND METHODS: We studied 13 associated single nucleotide polymorphisms from these genes in 3,041 patients with type 2 diabetes and 3,678 control subjects of Asian ancestry from Hong Kong and Korea. RESULTS: We confirmed the associations of TCF7L2, SLC30A8, HHEX, CDKAL1, CDKN2A/CDKN2B, IGF2BP2, and FTO with risk for type 2 diabetes, with odds ratios ranging from 1.13 to 1.35 (1.3 x 10(-12) < P(unadjusted) < 0.016). In addition, the A allele of rs8050136 at FTO was associated with increased BMI in the control subjects (P(unadjusted) = 0.008). However, we did not observe significant association of any genetic variants with surrogate measures of insulin secretion or insulin sensitivity indexes in a subset of 2,662 control subjects. Compared with subjects carrying zero, one, or two risk alleles, each additional risk allele was associated with 17% increased risk, and there was an up to 3.3-fold increased risk for type 2 diabetes in those carrying eight or more risk alleles. Despite most of the effect sizes being similar between Asians and Europeans in the meta-analyses, the ethnic differences in risk allele frequencies in most of these genes lead to variable attributable risks in these two populations. CONCLUSIONS: Our findings support the important but differential contribution of these genetic variants to type 2 diabetes and obesity in Asians compared with Europeans.
- 1939-327X (Electronic)
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