TITLE

Genetic Risk Score of 46 Type 2 Diabetes Risk Variants Associates With Changes in Plasma Glucose and Estimates of Pancreatic β-Cell Function Over 5 Years of Follow-Up

AUTHOR(S)
Andersson, Ehm A.; Allin, Kristine H.; Sandholt, Camilla H.; Borglykke, Anders; Lau, Cathrine J.; Ribel-Madsen, Rasmus; Sparsø, Thomas; Justesen, Johanne M.; Harder, Marie N.; Jørgensen, Marit E.; Jørgensen, Torben; Hansen, Torben; Pedersen, Oluf
PUB. DATE
October 2013
SOURCE
Diabetes;Oct2013, Vol. 62 Issue 10, p3610
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
More than 40 genetic risk variants for type 2 diabetes have been validated. We aimed to test whether a genetic risk score associates with the incidence of type 2 diabetes and with 5-year changes in glycemic traits and whether the effects were modulated by changes in BMI and lifestyle. The Inter99 study population was genotyped for 46 variants, and a genetic risk score was constructed. During a median follow-up of 11 years, 327 of 5,850 individuals developed diabetes. Physical examinations and oral glucose tolerance tests were performed at baseline and after 5 years (n = 3,727). The risk of incident type 2 diabetes was increased with a hazard ratio of 1.06 (95% CI 1.03-1.08) per risk allele. While the population in general had improved glucose regulation during the 5-year follow-up period, each additional allele in the genetic risk score was associated with a relative increase in fasting, 30-min, and 120-min plasma glucose values and a relative decrease in measures of β-cell function over the 5-year period, whereas indices of insulin sensitivity were unaffected. The effect of the genetic risk score on 5-year changes in fasting plasma glucose was stronger in individuals who increased their BMI. In conclusion, a genetic risk score based on 46 variants associated strongly with incident type 2 diabetes and 5-year changes in plasma glucose and β-cell function. Individuals who gain weight may be more susceptible to the cumulative impact of type 2 diabetes risk variants on fasting plasma glucose.
ACCESSION #
90405228

 

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