Impact of atopic dermatitis and loss-of-function mutations in the filaggrin gene on the development of occupational irritant contact dermatitis

M. J. Visser, L. Landeck, L. E. Campbell, W. H. I. McLean, S. Weidinger, F. Calkoen, S. M. John, S. Kezic

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    Abstract

    Background Atopic dermatitis (AD) and loss-of-function mutations in the filaggrin gene (FLG) are both associated with chronic irritant contact dermatitis (ICD). As FLG mutations also are a major risk factor for AD, it is not clear whether FLG mutations are an independent risk factor for ICD or whether the risk is mediated by AD.

    Objectives To investigate the relative contribution and interaction of FLG mutations and AD in German patients with occupational ICD and controls (vocational school apprentices).

    Methods A total of 634 patients and 393 controls were genotyped for R501X, 2282del4, R2447X and S3247X. Current or past flexural eczema was used as an indicator of AD.

    Results FLG mutations were found in 15.9% of the patients with ICD and 8.3% of the controls, with a crude odds ratio (OR) of 2.09 [95% confidence interval (CI) 1.33-3.28] for the combined genotype. The adjusted OR for FLG mutations, corrected for AD, was 1.62 (95% CI 1.01-2.58). Subjects with AD were at approximately three times higher risk of developing ICD than controls (OR 2.89; 95% CI 2.09-3.99). There was no evidence of an interaction between these two risk factors.

    Conclusions Our results indicate that both FLG mutations and AD increase the risk of ICD. Individuals with concurrent FLG mutations and AD are at the highest risk of developing ICD.

    Original languageEnglish
    Pages (from-to)326-332
    Number of pages7
    JournalBritish Journal of Dermatology
    Volume168
    Issue number2
    DOIs
    Publication statusPublished - 2013

    Keywords

    • HAND ECZEMA
    • CONFER SUSCEPTIBILITY
    • STRATUM-CORNEUM
    • EARLY-ONSET
    • POPULATION
    • TRANSEPIDERMAL WATER-LOSS
    • SKIN
    • PROSPECTIVELY-FOLLOWED COHORT
    • ICHTHYOSIS VULGARIS
    • NULL MUTATIONS

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