Institute of Diabetes Research, Helmholtz Zentrum München, Neuherberg, Germany.
PLoS One. 2012;7(4):e35410. doi: 10.1371/journal.pone.0035410. Epub 2012 Apr 25.
To investigate whether type 2 diabetes susceptibility genes and body weight influence the development of islet autoantibodies and the rate of progression to type 1 diabetes.
Genotyping for single nucleotide polymorphisms (SNP) of the type 2 diabetes susceptibility genes CDKAL1, CDKN2A/2B, FTO, HHEX-IDE, HMGA2, IGF2BP2, KCNJ11, KCNQ1, MTNR1B, PPARG, SLC30A8 and TCF7L2 was obtained in 1350 children from parents with type 1 diabetes participating in the BABYDIAB study. Children were prospectively followed from birth for islet autoantibodies and type 1 diabetes. Data on weight and height were obtained at 9 months, 2, 5, 8, 11, and 14 years of age.
None of type 2 diabetes risk alleles at the CDKAL1, CDKN2A/2B, FTO, HHEX-IDE, HMGA2, IGF2BP2, KCNJ11, KCNQ1, MTNR1B, PPARG and SLC30A8 loci were associated with the development of islet autoantibodies or diabetes. The type 2 diabetes susceptible genotype of TCF7L2 was associated with a lower risk of islet autoantibodies (7% vs. 12% by age of 10 years, P = 0.015, P(corrected) = 0.18). Overweight children at seroconversion did not progress to diabetes faster than non-overweight children (HR: 1.08; 95% CI: 0.48-2.45, P>0.05).
These findings do not support an association of type 2 diabetes risk factors with islet autoimmunity or acceleration of diabetes in children with a family history of type 1 diabetes.
研究 2 型糖尿病易感基因和体重是否影响胰岛自身抗体的发展及向 1 型糖尿病的进展速度。
在参与 BABYDIAB 研究的 1350 名父母患有 1 型糖尿病的儿童中,对 2 型糖尿病易感基因 CDKAL1、CDKN2A/2B、FTO、HHEX-IDE、HMGA2、IGF2BP2、KCNJ11、KCNQ1、MTNR1B、PPARG、SLC30A8 和 TCF7L2 的单核苷酸多态性(SNP)进行基因分型。从出生起对儿童进行前瞻性随访,以检测胰岛自身抗体和 1 型糖尿病。在 9 个月、2、5、8、11 和 14 岁时获取体重和身高数据。
在 CDKAL1、CDKN2A/2B、FTO、HHEX-IDE、HMGA2、IGF2BP2、KCNJ11、KCNQ1、MTNR1B、PPARG 和 SLC30A8 基因座上,2 型糖尿病的风险等位基因均与胰岛自身抗体的发展或糖尿病无关。TCF7L2 的 2 型糖尿病易感基因型与胰岛自身抗体的风险较低相关(10 岁时的发生率分别为 7%和 12%,P = 0.015,P(corrected) = 0.18)。在发生自身抗体阳性转换的超重儿童中,进展为糖尿病的速度并不快于非超重儿童(HR:1.08;95%CI:0.48-2.45,P>0.05)。
这些发现不支持 2 型糖尿病危险因素与胰岛自身免疫或有 1 型糖尿病家族史的儿童糖尿病进展加速之间存在关联。