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Serum 25-hydroxyvitamin D and IgE – a significant but nonlinear relationship

  1. E. Hyppönen1,
  2. D. J. Berry1,
  3. M. Wjst2,
  4. C. Power1

Article first published online: 12 JAN 2009

DOI: 10.1111/j.1398-9995.2008.01865.x

Issue

Allergy

Allergy

Volume 64, Issue 4, pages 613–620, April 2009

Additional Information

How to Cite

Hyppönen, E., Berry, D. J., Wjst, M. and Power, C. (2009), Serum 25-hydroxyvitamin D and IgE – a significant but nonlinear relationship. Allergy, 64: 613–620. doi: 10.1111/j.1398-9995.2008.01865.x

Author Information

  1. 1

    MRC Centre for the Epidemiology of Child Health, UCL Institute of Child Health, London, UK

  2. 2

    Helmholtz Zentrum München, German Research Center for Environmental Health, München-Neuherberg, Germany

*Dr Elina Hyppönen MRC Centre for the Epidemiology of Child Health UCL Institute of Child Health 30 Guilford Street London WC1N 1EH UK

Publication History

  1. Issue published online: 12 MAR 2009
  2. Article first published online: 12 JAN 2009
  3. Accepted for publication 3 July 2008

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Keywords:

  • 25-hydroxyvitamin D;
  • CYP27B1;
  • IgE;
  • vitamin D

Background:  Hormonal vitamin D system affects the determination of T-cell responses. It is unknown if there is an association between vitamin D status and allergic conditions. Our aim was to investigate differences in serum IgE concentrations by vitamin D status [measured by 25(OH)D] and by a genetic variation in a key vitamin D activation enzyme (CYP27B1) previously shown to be associated with type 1 diabetes.

Methods:  9377 participants in the 1958 British birth cohort completed a biomedical assessment at 45 years of age ; 7288 eligible participants had data on 25(OH)D and IgE, with 6429 having further information on CYP27B1 genotype (−1260C>A).

Results:  There was a nonlinear association between 25(OH)D and IgE (P-value for curvature = 0.0001). Compared with the reference group with the lowest IgE concentrations [25(OH)D 100–125 nmol/l], IgE concentrations were 29% higher (95% CI 9–48%) for participants with the 25(OH)D <25 nmol/l, and 56% higher (95% CI 17–95%) for participants with 25(OH)D >135 nmol/l (adjusted for sex, month, smoking, alcohol consumption, time spent outside, geographical location, social class, PC/TV time, physical activity, body mass index and waist circumference). CYP27B1 genotype was associated with both 25(OH)D (difference for A vs. C allele: 1.88%, 95% CI 0.37–3.4%, P = 0.01) and IgE concentrations (−6.59%, −11.6% to −1.42%, P = 0.01).

Conclusions:  These data suggest that there may be a threshold effect with both low and high 25(OH)D levels associated with elevated IgE concentrations. The same CYP27B1 allele that is protective of diabetes was associated with increased IgE concentrations.

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