Comprehensive analysis of the gene encoding filaggrin uncovers prevalent and rare mutations in ichthyosis vulgaris and atopic eczema

Aileen Sandilands, Ana Terron-Kwiatkowski, Peter R. Hull, Grainne M. O'Regan, Timothy H. Clayton, Rosemarie M. Watson, Thomas Carrick, Alan T. Evans, Haihui Liao, Yiwei Zhao, Linda E. Campbell, Matthias Schmuth, Robert Gruber, Andreas R. Janecke, Peter M. Elias, Maurice van Steensel, Ivo Nagtzaam, Michel van Geel, Peter M. Steijlen, Colin S. MunroDaniel G. Bradley, Colin N. A. Palmer, Frances J. D. Smith, W. H. Irwin McLean, Alan D. Irvine

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451 Citations (Scopus)

Abstract

NOTE: THE SPECIAL CHARACTERS IN THIS ABSTRACT CANNOT BE DISPLAYED CORRECTLY ON THIS PAGE. PLEASE REFER TO THE PUBLISHER’S WEBSITE FOR AN ACCURATE DISPLAY. We recently reported two common filaggrin (FLG) null mutations that cause ichthyosis vulgaris1 and predispose to eczema and secondary allergic diseases2. We show here that these common European mutations are ancestral variants carried on conserved haplotypes. To facilitate comprehensive analysis of other populations, we report a strategy for full sequencing of this large, highly repetitive gene, and we describe 15 variants, including seven that are prevalent. All the variants are either nonsense or frameshift mutations that, in representative cases, resulted in loss of filaggrin production in the epidermis. In an Irish case-control study, the five most common European mutations showed a strong association with moderate-to-severe childhood eczema (2 test: P = 2.12 10-51; Fisher's exact test: heterozygote odds ratio (OR) = 7.44 (95% confidence interval (c.i.) = 4.9–11.3), and homozygote OR = 151 (95% c.i. = 20–1,136)). We found three additional rare null mutations in this case series, suggesting that the genetic architecture of filaggrin-related atopic dermatitis consists of both prevalent and rare risk alleles.
Original languageEnglish
Pages (from-to)650-654
Number of pages5
JournalNature Genetics
Volume39
Issue number5
DOIs
Publication statusPublished - 2007

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    Sandilands, A., Terron-Kwiatkowski, A., Hull, P. R., O'Regan, G. M., Clayton, T. H., Watson, R. M., Carrick, T., Evans, A. T., Liao, H., Zhao, Y., Campbell, L. E., Schmuth, M., Gruber, R., Janecke, A. R., Elias, P. M., van Steensel, M., Nagtzaam, I., van Geel, M., Steijlen, P. M., ... Irvine, A. D. (2007). Comprehensive analysis of the gene encoding filaggrin uncovers prevalent and rare mutations in ichthyosis vulgaris and atopic eczema. Nature Genetics, 39(5), 650-654. https://doi.org/10.1038/ng2020