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Implication of genetic variants near TCF7L2, SLC30A8, HHEX, CDKAL1, CDKN2A/B, IGF2BP2, and FTO in type 2 diabetes and obesity in 6,719 Asians.

Ng, MC; Park, KS; Oh, B; Tam, CH; Cho, YM; Shin, HD; Lam, VK; Ma, RC; So, WY; Cho, YS; Kim, HL; Lee, HK; Chan, JC; Cho, NH
Diabetes, 57(8):2226-2233, 2008
Journal Title
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.
MeSH terms
AdultAgedAllelesAsian Continental Ancestry Group/genetics*Cation Transport Proteins/geneticsCyclin-Dependent Kinase 5/geneticsCyclin-Dependent Kinase Inhibitor p15/geneticsCyclin-Dependent Kinase Inhibitor p16/geneticsDiabetes Mellitus, Type 2/ethnologyDiabetes Mellitus, Type 2/genetics*FemaleGene FrequencyGenetic Predisposition to Disease/ethnologyGenetic Predisposition to Disease/geneticsGenotypeHomeodomain Proteins/geneticsHong Kong/epidemiologyHumansKorea/epidemiologyMaleMiddle AgedObesity/ethnologyObesity/genetics*Polymorphism, Single Nucleotide*RNA-Binding Proteins/geneticsTCF Transcription Factors/geneticsTranscription Factor 7-Like 2 ProteinTranscription Factors/genetics
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Journal Papers > School of Medicine / Graduate School of Medicine > Preventive Medicine & Public Health
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조, 남한
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