1. Effect of filaggrin loss-of-function mutations on atopic dermatitis in young age: a longitudinal birth cohort study.
- Author
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Koseki R, Morii W, Noguchi E, Ishikawa M, Yang L, Yamamoto-Hanada K, Narita M, Saito H, and Ohya Y
- Subjects
- Child, Child, Preschool, Female, Filaggrin Proteins, Follow-Up Studies, Humans, Infant, Longitudinal Studies, Male, S100 Proteins metabolism, Dermatitis, Atopic genetics, Dermatitis, Atopic metabolism, Dermatitis, Atopic pathology, Loss of Function Mutation, S100 Proteins genetics
- Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease, and skin barrier defects are often observed in patients with AD. So far, few association studies between FLG loss-of-function mutations and onset of AD in longitudinal studies of early childhood have been reported. In the present study, we aimed to investigate the effect of FLG loss-of-function mutations on the development of AD in a longitudinal birth cohort study. The status of AD diagnosis at each age until 6 years was collected from the Tokyo Children's Health, Illness, and Development (T-CHILD) study. We analyzed eight loss-of-function mutations in FLG in 712 participants. FLG loss-of-function mutations were significantly associated with AD onset in infancy (≤2 years) (P < 0.001, OR 3.54, 95% CI 1.88-6.65), but not with AD onset in childhood (≥3 years) (P = 0.981, OR 0.99, 95% CI 0.29-3.36), and none of the children in the present cohort who developed AD at 5 years of age or later carried FLG loss-of-function mutations. Our data support the notion that the effect of FLG loss-of-function mutations is prominent during a very early stage of life.
- Published
- 2019
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