Get access

Evidence for a genetic interaction in allergy-related responsiveness to vitamin D deficiency

Authors

  • K. S. Vimaleswaran,

    1. Centre for Paediatric Epidemiology and Biostatistics and MRC Centre for the Epidemiology of Child Health, UCL Institute of Child Health, London, UK
    Search for more papers by this author
  • A. Cavadino,

    1. Centre for Paediatric Epidemiology and Biostatistics and MRC Centre for the Epidemiology of Child Health, UCL Institute of Child Health, London, UK
    Search for more papers by this author
  • E. Hyppönen

    Corresponding author
    • Centre for Paediatric Epidemiology and Biostatistics and MRC Centre for the Epidemiology of Child Health, UCL Institute of Child Health, London, UK
    Search for more papers by this author

  • Edited by: Stephan Weidinger

Correspondence

Elina Hyppönen, Centre for Paediatric Epidemiology and Biostatistics, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK.

Tel.: 020 7905 2622

Fax: 020 7905 2793

E-mail: e.hypponen@ucl.ac.uk

Abstract

Background

The hormonal form of vitamin D affects both adaptive and innate immune functions involved in the development of allergies. Certain genotypes have been seen to alter the association between vitamin D deficiency (VDD) and the risk of food sensitization in children.

Methods

We examined 27 functional single nucleotide polymorphisms (SNPs) in/near selected candidate genes for association with total immunoglobulin E (IgE) and effect modification by 25-hydroxyvitamin D in the 1958 British birth cohort (aged 45 years, n = 4921). A cut-off value of 50 nmol/L was used to define VDD.

Results

Four SNPs (in FCER1A, IL13, and CYP24A1) and three SNPs (in IL4 and CYP24A1) were associated with total IgE and specific IgE, respectively, after correction for multiple testing. As in a previous study, MS4A2 (rs512555, Pinteraction = 0.04) and IL4 (rs2243250, Pinteraction = 0.02), and their composite score (Pinteraction = 0.009) modified the association between VDD and allergy-related outcome. Vitamin D deficiency was associated with higher total IgE only in the carriers of the ‘C’ allele (IL4), which is present in 86% of white Europeans, while only 26% of Chinese and <20% of some African populations are carriers.

Conclusions

Our study on white European adults was consistent with a previous study on children from largely non-white ethnic groups, suggesting that IL4 and MS4A2 genotypes modify the association between VDD and allergy risk. The risk allele in IL4 is present in nearly 90% of white Europeans, while less than a quarter are carriers in some other populations, highlighting the need to consider possible ethnic differences in allergy-related responsiveness to VDD.

Ancillary