Diabetes 51:3561-3567, 2002
© 2002 by the American Diabetes Association, Inc.
Variants Within the Calpain-10 Gene on Chromosome 2q37 (NIDDM1) and Relationships to Type 2 Diabetes, Insulin Resistance, and Impaired Acute Insulin Secretion Among Scandinavian Caucasians
Søren K. Rasmussen1,
Søren A. Urhammer1,
Lars Berglund2,
Jan N. Jensen1,
Lars Hansen1,
Søren M. Echwald1,
Knut Borch-Johnsen1,3,
Yukio Horikawa4,5,
Hirosato Mashima4,
Hans Lithell2,
Nancy J. Cox6,7,
Torben Hansen1,
Graeme I. Bell4,5,6,7, and
Oluf Pedersen1
1 Steno Diabetes Center and Hagedorn Research Institute, Gentofte, Denmark
2 Department of Health and Caring Sciences/Geriatrics, University of Uppsala, Uppsala, Sweden
3 Center of Preventive Medicine, Glostrup University Hospital, Glostrup, Denmark
4 Department of the Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois
5 Howard Hughes Medical Institute, University of Chicago, Chicago, Illinois
6 Department of Human Genetics, University of Chicago, Chicago, Illinois
7 Department of Medicine, University of Chicago, Chicago, Illinois
Variations in the calpain-10 gene (CAPN10) have been identified among Mexican-Americans, and an at-risk haplotype combination (112/121) defined by three polymorphisms, UCSNP-43, -19, and -63, confers increased risk of type 2 diabetes. Here we examine the three polymorphisms in 1,594 Scandinavian subjects, including 409 type 2 diabetic patients, 200 glucose-tolerant control subjects, 322 young healthy subjects, 206 glucose-tolerant offspring of diabetic patients, and 457 glucose-tolerant 70-year-old men. The frequency of the 112/121 combination was not significantly different in 409 type 2 diabetic subjects compared with 200 glucose-tolerant control subjects (0.06 vs. 0.05; odds ratio 1.32 [95% CI 0.583.30]). In glucose-tolerant subjects, neither the single-nucleotide polymorphisms individually nor the 112/121 combination were associated with alterations in plasma glucose, serum insulin, or serum C-peptide levels at fasting or during an oral glucose tolerance test, estimates of insulin sensitivity, or glucose-induced insulin secretion. In conclusion, the frequency of the 112/121 at-risk haplotype of CAPN10 is low among Scandinavians and we were unable to demonstrate significant associations between the CAPN10 variants and type 2 diabetes, insulin resistance, or impaired insulin secretion.

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Copyright © 2002 by the American Diabetes Association.
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