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(Arteriosclerosis, Thrombosis, and Vascular Biology. 2000;20:217.)
© 2000 American Heart Association, Inc.

Atherosclerosis and Lipoproteins

The Private Hepatocyte Nuclear Factor-1 G319S Variant Is Associated With Plasma Lipoprotein Variation in Canadian Oji-Cree

Robert A. Hegele; Henian Cao; Stewart B. Harris; Anthony J. G. Hanley; Bernard Zinman; Philip W. Connelly
Abstract—We previously showed an extremely strong association between type 2 diabetes and a private polymorphism, namely G319S, in the hepatocyte nuclear transcription factor (HNF)-1. Because HNF-1 is involved in the transcription of several apolipoprotein genes, we tested for an association between the private HNF1A G319S variant and plasma lipoproteins in a sample of 55 unrelated Oji-Cree subjects with type 2 diabetes and 175 unrelated Oji-Cree subjects without type 2 diabetes. In Oji-Cree subjects with type 2 diabetes, we found that the HNF1A G319S genotype was significantly associated with lower plasma concentrations of total cholesterol, low density lipoprotein cholesterol, and apolipoprotein (apo) B. In Oji-Cree subjects without type 2 diabetes, we found that the HNF1A G319S genotype was significantly associated with higher plasma concentrations of high density lipoprotein cholesterol and apo AI. There were no associations with plasma triglycerides or lipoprotein(a). Regression analysis indicated that the HNF1A genotype accounted for 10% of the variation in the apo B–related traits in the diabetic subjects and for 5% of the variation in the apo AI–related traits in the nondiabetic subjects. Furthermore, the regression model indicated that the HNF1A S319 allele affected these traits in a dominant manner in subjects with and without type 2 diabetes. These findings provide the first evidence that a rare variant in a nuclear transcription factor is associated with variation in plasma lipoprotein traits.

Key Words: transcription factors • diabetes • polygenic traits • atherosclerosis

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