Edited by: Stephan Weidinger
Evidence for a genetic interaction in allergy-related responsiveness to vitamin D deficiency
Article first published online: 12 JUN 2012
© 2012 John Wiley & Sons A/S
Volume 67, Issue 8, pages 1033–1040, August 2012
How to Cite
Vimaleswaran KS, Cavadino A, Hyppönen E. Evidence for a genetic interaction in allergy-related responsiveness to vitamin D deficiency. Allergy 2012; DOI:10.1111/j.1398-9995.2012.02856.x.
- Issue published online: 12 JUL 2012
- Article first published online: 12 JUN 2012
- Manuscript Accepted: 7 MAY 2012
- Medical Research Council. Grant Number: G0000934
- British Heart Foundation. Grant Number: PG/09/023
- UK Medical Research Council. Grant Number: G0601653
- Academy of Finland
- 1958 British birth cohort;
- 25-hydroxyvitamin D;
- gene × environment interaction;
- total IgE
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.
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.
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.
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.