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Identification of low-frequency variants associated with gout and serum uric acid levels

  • Patrick Sulem
  • , Daniel F Gudbjartsson
  • , G Bragi Walters
  • , Hafdis T Helgadottir
  • , Agnar Helgason
  • , Sigurjon A Gudjonsson
  • , Carlo Zanon
  • , Soren Besenbacher
  • , Gyda Bjornsdottir
  • , Olafur T Magnusson
  • , Gisli Magnusson
  • , Eirikur Hjartarson
  • , Jona Saemundsdottir
  • , Arnaldur Gylfason
  • , Adalbjorg Jonasdottir
  • , Hilma Holm
  • , Ari Karason
  • , Thorunn Rafnar
  • , Hreinn Stefansson
  • , Ole A Andreassen
  • Jesper H Pedersen, Allan I Pack, Marieke C H de Visser, Lambertus A Kiemeney, Arni J Geirsson, Gudmundur I Eyjolfsson, Isleifur Olafsson, Augustine Kong, Gisli Masson, Helgi Jonsson, Unnur Thorsteinsdottir, Ingileif Jonsdottir, Kari Stefansson
    133 Citationer (Scopus)

    Abstract

    We tested 16 million SNPs, identified through whole-genome sequencing of 457 Icelanders, for association with gout and serum uric acid levels. Genotypes were imputed into 41,675 chip-genotyped Icelanders and their relatives, for effective sample sizes of 968 individuals with gout and 15,506 individuals for whom serum uric acid measurements were available. We identified a low-frequency missense variant (c.1580C>G) in ALDH16A1 associated with gout (OR = 3.12, P = 1.5 × 10(-16), at-risk allele frequency = 0.019) and serum uric acid levels (effect = 0.36 s.d., P = 4.5 × 10(-21)). We confirmed the association with gout by performing Sanger sequencing on 6,017 Icelanders. The association with gout was stronger in males relative to females. We also found a second variant on chromosome 1 associated with gout (OR = 1.92, P = 0.046, at-risk allele frequency = 0.986) and serum uric acid levels (effect = 0.48 s.d., P = 4.5 × 10(-16)). This variant is close to a common variant previously associated with serum uric acid levels. This work illustrates how whole-genome sequencing data allow the detection of associations between low-frequency variants and complex traits.
    OriginalsprogEngelsk
    TidsskriftNature Genetics
    Vol/bind43
    Udgave nummer11
    Sider (fra-til)1127-30
    Antal sider4
    ISSN1061-4036
    DOI
    StatusUdgivet - 2011

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