Studies of variability in the islet amyloid polypeptide gene in relation to Type 2 diabetes.
2003
Aims To explore whether the coding region of the islet amyloid polypeptide (IAPP) gene contains genetic variants associated with Type 2 diabetes and whether a previously reported association of the promoter variant −132ga with Type 2 diabetes could be reproduced in Danish Caucasians.
Methods The coding region was analyzed using single strand conformation polymorphism (SSCP) and heteroduplex analysis in 192 Type 2 diabetic patients. Restriction fragment length polymorphism (RFLP) was employed to screen for the promoter variant in 414 Type 2 diabetic patients and 182 glucose-tolerant control subjects.
Results The SSCP analysis identified an IVS+75ag variant in two patients. The frequency of heterozygous carriers of the promoter variant in the case–control study was 4.1% (17/414) and 7.1% (13/182), respectively. Odds ratio of the prevalence of Type 2 diabetes in carriers compared with non-carriers was estimated to be 0.47 (95% confidence interval 0.19, 1.15).
Conclusion Neither variability in the coding region of the IAPP gene nor the −132ga promoter variant was associated with Type 2 diabetes among the studied Danish Caucasians.
Diabet. Med. 20, 491–494 (2003)
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