Association of genetic variants at 3q22 with nephropathy in patients with type 1 diabetes mellitus

Bing He, Anne-May Osterholm, Anna Hoverfalt, Carol Forsblom, Eyrun Edda Hjorleifsdottir, Ann-Sofie Nilsson, Maikki Parkkonen, Janne Pitkaniemi, Astradur Hreidarsson, Cinzia Sarti, Amy Jayne McKnight, A. Peter Maxwell, Jaakko Tuomilehto, Per-Henrik Groop, Karl Tryggvason

Research output: Contribution to journalArticleScientificpeer-review

Abstract

"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."
Original languageEnglish
JournalAmerican Journal of Human Genetics
Volume84
Issue number4
Pages (from-to)5-13
Number of pages9
ISSN0002-9297
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fields of Science

  • WHOLE-GENOME ASSOCIATION
  • CHROMOSOME 3Q
  • SUSCEPTIBILITY
  • LINKAGE
  • MICROALBUMINURIA
  • HYPERTENSION
  • PROMOTER
  • NEPHRIN
  • DISEASE
  • LOCUS
  • 314 Health sciences

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