151. Common FLG Mutation K4671X Not Associated with Atopic Dermatitis in Han Chinese in a Family Association Study
- Author
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Wanqing Liao, Hui Zhang, Jianfeng Tao, Aifang Jiang, Ruhong Cheng, Huaishan Qi, Jiecheng Gan, Ming Li, Xilan Chen, Hong Yu, Zhirong Yao, and Yifeng Guo
- Subjects
Male ,Genetic Screens ,lcsh:Medicine ,Atopic Dermatitis ,Filaggrin Proteins ,medicine.disease_cause ,Ichthyosis Vulgaris ,Loss of heterozygosity ,Gene Frequency ,Intermediate Filament Proteins ,Ethnicity ,lcsh:Science ,Genetics ,Mutation ,Multidisciplinary ,Reverse Transcriptase Polymerase Chain Reaction ,Atopic dermatitis ,Immunohistochemistry ,Phenotype ,Child, Preschool ,Medicine ,Female ,Research Article ,Adult ,China ,Dermatology ,Biology ,Dermatitis, Atopic ,Asian People ,Genetic Mutation ,Heredity ,medicine ,Humans ,Family ,Genetic Predisposition to Disease ,Allele ,Allele frequency ,Genetic Association Studies ,Alleles ,Evolutionary Biology ,Population Biology ,lcsh:R ,Case-control study ,Computational Biology ,Human Genetics ,medicine.disease ,Amino Acid Substitution ,Case-Control Studies ,Immunology ,lcsh:Q ,Population Genetics ,Ichthyosis vulgaris - Abstract
BACKGROUND: Filaggrin gene (FLG) mutations have been identified as the cause of ichthyosis vulgaris (IV) and major predisposing factors for atopic dermatitis (AD). The relationship among AD, IV and FLG mutations has not been clarified yet. Mutations 3321delA and K4671X, two of the most common mutations in Chinese patients, were both statistically associated with AD in case-control studies. MATERIALS AND METHODS: A group of 100 family trios (a total of 300 members with one affected AD proband and both parents) were recruited and screened for three filaggrin null mutations (3222del4, 3321delA and K4671X). The subjects' manifestations of AD and IV were assessed by two experienced dermatologists and recorded in detail. The relationship of common mutations to AD were assessed using both case-control and family-based tests of association. Filaggrin expression was measured in skin of 3 subjects with K4671X heterozygote and the normal control using quantitative real-time RT-PCR and immunohistochemistry. RESULTS: Of 100 probands for AD, 22 were carriers for common FLG mutations and only 2 of them were from 40 none-IV family trios (5.00%), consistent with that of the healthy control group (3.99%, P>0.05). Significant statistical associations were revealed between AD and 3321delA (P
- Published
- 2012