Erschienen in:
01.07.2006 | Article
Common polymorphisms of calpain-10 are associated with abdominal obesity in subjects at high risk of type 2 diabetes
verfasst von:
J. Pihlajamäki, U. Salmenniemi, M. Vänttinen, E. Ruotsalainen, J. Kuusisto, I. Vauhkonen, S. Kainulainen, M. C. Y. Ng, N. J. Cox, G. I. Bell, M. Laakso
Erschienen in:
Diabetologia
|
Ausgabe 7/2006
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Abstract
Aims/hypothesis
The mechanisms by which the calpain-10 gene (CAPN10) affects the risk of type 2 diabetes are unclear. Therefore, we investigated the effects of four polymorphisms in CAPN10 (single nucleotide polymorphism [SNP]-43, SNP-44, Insertion/Deletion [Indel]-19 and SNP-63) on insulin secretion, insulin action and abdominal fat distribution in offspring of patients with type 2 diabetes.
Subjects and methods
Insulin secretion was determined by an IVGTT, insulin action by the hyperinsulinaemic–euglycaemic clamp and abdominal fat distribution by computed tomography in 158 non-diabetic offspring (age 34.9±6.3 years [mean±SD], BMI 26.2±4.9 kg/m2) of type 2 diabetic patients.
Results
SNP-43 (p=0.009 over the three genotypes, adjusted for age, sex, BMI and family relationship) and haplotypes carrying the A allele of SNP-43 were associated with intra-abdominal fat area. The A allele of SNP-43 was associated with intra-abdominal fat area in men (p=0.014) but not in women. SNP-44, InDel-19 and SNP-63 were not associated with intra-abdominal fat area or insulin action. Furthermore, we demonstrated in a separate sample of middle-aged men (n=234) who had a history of type 2 diabetes in first-degree relatives that the A allele of SNP-43 was associated with a large waist circumference, and high insulin levels in an OGTT.
Conclusions/interpretation
SNP-43 of CAPN10 may contribute to the risk of diabetes by regulating abdominal obesity in subjects with high risk of type 2 diabetes.