Interleukin 1 beta promoter polymorphism is associated with keratoconus in a Japanese population. |
| Authors: |
Mikami, T Meguro, A Teshigawara, T Takeuchi, M Uemoto, R Kawagoe, T Nomura, E Asukata, Y Ishioka, M Iwasaki, M Fukagawa, K Konomi, K Shimazaki, J Nishida, T Mizuki, N
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| Citation: |
Mikami T, etal., Mol Vis. 2013 Apr 11;19:845-51. Print 2013. |
| RGD ID: |
7401165 |
| Pubmed: |
PMID:23592922 (View Abstract at PubMed) |
| PMCID: |
PMC3626376 (View Article at PubMed Central) |
PURPOSE: Polymorphisms in the interleukin 1 alpha (IL1A) and IL1B gene regions were previously associated with keratoconus in a Korean population. In the present study, we investigated whether the IL1A and IL1B polymorphisms are associated with keratoconus in a Japanese population. METHODS: A total of 169 Japanese patients with keratoconus and 390 Japanese healthy controls were recruited. We genotyped one IL1A single nucleotide polymorphism (SNP; rs2071376) and two IL1B SNPs (rs1143627 and rs16944) to compare the frequencies of alleles, genotypes, and haplotypes between cases and controls. RESULTS: Statistically significant association was observed for rs1143627 (-31 T>C) in the IL1B promoter region; the T allele of rs1143627 was associated with an increased risk of keratoconus (p=0.014, corrected p value [pc]=0.043, odds ratio=1.38). The C allele of rs16944 (-511 C>T) in the IL1B promoter region had a 1.33-fold increased risk of keratoconus, although this increase did not reach statistical significance (p=0.033, pc=0.098). The TT genotype of rs1143627 was weakly associated with an increased risk of keratoconus (p=0.033, pc=0.099, odds ratio=1.52). However, no significant differences were found in the allele and genotype frequencies between the cases and controls for rs2071376 in IL1A. Regarding haplotypic diversity, the haplotype created by the T allele of rs1143627 and C allele of rs16944 was associated with a 1.72-fold increased risk of keratoconus (p=4.0x10(-5), pc=1.6x10(-4)). CONCLUSIONS: Our results replicate associations reported recently in a Korean population. Thus, IL1B may play an important role in the development of keratoconus through genetic polymorphisms.
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| Genes (Rattus norvegicus) |
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| Il1b (interleukin 1 beta) |
| Genes (Mus musculus) |
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| Il1b (interleukin 1 beta) |
| Genes (Homo sapiens) |
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| IL1B (interleukin 1 beta) |
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