OBJECTIVE: The aim of the present study was to examine if absence of a common allele in a microsatellite polymorphism in the insulin-like growth factor I (IGF-I) promoter was associated with type 2 diabetes and alterations in quantitative traits in glucose-tolerant subjects. METHODS: The IGF-I promoter polymorphism was investigated in a case-control study comprising 694 type 2 diabetic patients and 218 glucose-tolerant control subjects, and in two genotype-quantitative trait studies involving 208 glucose-tolerant first-degree offspring of type 2 diabetic patients and 218 unrelated middle-aged subjects with normal glucose tolerance. RESULTS: No associations were found between the lack of the common promoter allele and type 2 diabetes (P = 0.25) or estimates of glucose metabolism in glucose-tolerant subjects. Presence of the wild-type allele was associated with an increase in fasting serum triglyceride levels in the group of 208 glucose-tolerant first-degree offspring of type 2 diabetic patients (P = 0.002). This finding was replicated in an independent sample of 218 unrelated middle-aged subjects with normal glucose tolerance (P = 0.007). CONCLUSION: The present study provides evidence that the common wild-type allele of the IGF-I promoter polymorphism is associated with increased levels of fasting serum triglyceride in glucose-tolerant whites.
OBJECTIVE: The aim of the present study was to examine if absence of a common allele in a microsatellite polymorphism in the insulin-like growth factor I (IGF-I) promoter was associated with type 2 diabetes and alterations in quantitative traits in glucose-tolerant subjects. METHODS: The IGF-I promoter polymorphism was investigated in a case-control study comprising 694 type 2 diabeticpatients and 218 glucose-tolerant control subjects, and in two genotype-quantitative trait studies involving 208 glucose-tolerant first-degree offspring of type 2 diabeticpatients and 218 unrelated middle-aged subjects with normal glucose tolerance. RESULTS: No associations were found between the lack of the common promoter allele and type 2 diabetes (P = 0.25) or estimates of glucose metabolism in glucose-tolerant subjects. Presence of the wild-type allele was associated with an increase in fasting serum triglyceride levels in the group of 208 glucose-tolerant first-degree offspring of type 2 diabeticpatients (P = 0.002). This finding was replicated in an independent sample of 218 unrelated middle-aged subjects with normal glucose tolerance (P = 0.007). CONCLUSION: The present study provides evidence that the common wild-type allele of the IGF-I promoter polymorphism is associated with increased levels of fasting serum triglyceride in glucose-tolerant whites.
Authors: Vanessa Y Tan; Caroline J Bull; Kalina M Biernacka; Alexander Teumer; Tom G Richardson; Eleanor Sanderson; Laura J Corbin; Tom Dudding; Qibin Qi; Robert C Kaplan; Jerome I Rotter; Nele Friedrich; Uwe Völker; Julia Mayerle; Claire M Perks; Jeff M P Holly; Nicholas J Timpson Journal: Cancer Epidemiol Biomarkers Prev Date: 2021-09-28 Impact factor: 4.090
Authors: Rocio R D Coletta; Alexander A L Jorge; Catarina Brasil D'Alva; Emília M Pinto; Ana Elisa C Billerbeck; Paulo R Pachi; Carlos A Longui; Ricardo M Garcia; Margaret Boguszewski; Ivo J P Arnhold; Berenice B Mendonca; Elaine M F Costa Journal: Clinics (Sao Paulo) Date: 2013-06 Impact factor: 2.365