期刊
AMERICAN JOURNAL OF HUMAN GENETICS
卷 84, 期 1, 页码 5-13出版社
CELL PRESS
DOI: 10.1016/j.ajhg.2008.11.012
关键词
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资金
- Foundations of Novo Nordisk
- Knut and Alice Wallenberg
- Sbderberg and Hedlund
- Swedish Medical Research Council
- Swedish Foundation for Strategic Research
- Swedish Diabetes Association
- Sigrid Juselius Foundation
- Academy of Finland [38387, 46558]
- Finnish Medical Society
- Northern Ireland Kidney Research Fund
- Northern Ireland Research and Development Office and the Health Research Board, Republic of Ireland
- Diabetes UK
- the juvenile Diabetes Research Foundation
- Public Health Agency [STL/3714/07] Funding Source: researchfish
Diabetic nephropathy (DN) is the primary cause of morbidity and mortality in patients with type 1 diabetes mellitus (T1DM) and affects about 30% of these patients. We have previously localized a DN locus on chromosome 3q with suggestive linkage in Finnish individuals. Linkage to this region has also been reported earlier by several other groups. To fine map this locus, we conducted a multistage case-control association study in T1DM patients, comprising 1822 cases with nephropathy and 1874 T1DM patients free of nephropathy, from Finland, Iceland, and the British Isles. At the screening stage, we genotyped 3072 tag SNPs, spanning a 28 Mb region, in 234 patients and 215 controls from Finland. SNPs that met the significance threshold of p < 0.01 at this stage were followed up by a series of sample sets. A genetic variant, rs1866813, in the noncoding region at 3q22 was associated with increased risk of DN (overall p = 7.07 x 10(-6), combined odds ratio [OR] of the allele = 1.33). The estimated genotypic ORs of this variant in all Finnish samples suggested a codominant effect, resulting in significant association, with a p value of 4.7 x 10(-5) (OR = 1.38; 959% confidence interval = 1.18-1.62). Additionally, an 11 kb segment flanked by rs62408925 and rs1866813, two strongly correlated variants (r(2) = 0.95), contains three elements highly conserved across multiple species. Independent replication will clarify the role of the associated variants at 3q22 in influencing the risk of DN.
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