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A comparative search for human FcεRIα gene (FCER1A) 3′-UTR polymorphisms in Japanese and Polish populations

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The high affinity immunoglobulin E (IgE) receptor (FcεRI) plays a key role in the pathogenesis of atopy and allergic disorders. Several polymorphisms located in 5′-flanking region and 5′-untranslated region (5′-UTR) of human FCER1A, the gene encoding FcεRI α-subunit, have been shown to functionally affect its transcriptional activity. All those genetic variants have been also associated with allergic diseases and/or serum IgE levels. In the present study, we sought to identify functional polymorphisms in human FCER1A 3′-untranslated region (3′-UTR), the potential candidates for future genetic association studies. Search for polymorphisms within human FCER1A 3′-UTR region, conducted in Japanese and Poles, revealed the presence of +5650A>G and +5714G>A variants. Subsequently, structure/distribution of haplotypes and LD measures were analyzed in Japanese and Poles for both 3′-UTR variants and the functional polymorphisms located in 5′-flanking region and 5′-UTR of human FCER1A. Additionally, reporter plasmids containing human FCER1A main promoter and 3′-UTR with all four possible combinations of +5650A>G and +5714G>A polymorphisms were constructed to evaluate functional potential of both 3′-UTR variants. However, no genotype-related differences in the gene expression were observed, as measured by reporter activity in cultured human basophil/mast cell-like KU812 cells, suggesting that both +5650A>G and +5714G>A have no genotype-related functional effect. In summary, we described linkage disequilibrium and the distribution of haplotypes for two identified human FCER1A 3′-UTR polymorphisms and several previously reported 5′-flanking region and 5′-UTR variants in Japanese and Poles, representative for East Asians and Caucasians, the two ethnic groups in which genetic associations between FCER1A and allergic diseases and/or serum IgE levels have been previously reported.

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  1. Numbering according to human FCER1A proximal (main) promoter. Otherwise, the numbering according to human FCER1A translation start site.

  2. Position in human chromosome 1 according to the recent release of Homo sapiens chromosome 1 reference sequence, GRCh37.p2 primary reference assembly (


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This work was supported by the Japan Society for the Promotion of Science (JSPS) Grant (to D. P. P) and the Funding Program for Next Generation World-Leading Researchers from the Ministry of Education, Culture, Sports, Science and Technology of Japan (to C. N.). We are grateful to Miss Michiyo Matsumoto for all her help and assistance.

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Correspondence to Chiharu Nishiyama.

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Daniel P. Potaczek and Maya Kamijo have contributed equally.

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Potaczek, D.P., Kamijo, M., Hara, M. et al. A comparative search for human FcεRIα gene (FCER1A) 3′-UTR polymorphisms in Japanese and Polish populations. Mol Biol Rep 39, 3747–3753 (2012).

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