Interleukin 1 beta promoter polymorphism is associated with keratoconus in a Japanese population

نویسندگان

  • Takenori Mikami
  • Akira Meguro
  • Takeshi Teshigawara
  • Masaki Takeuchi
  • Riyo Uemoto
  • Tatsukata Kawagoe
  • Eiichi Nomura
  • Yuri Asukata
  • Misaki Ishioka
  • Miki Iwasaki
  • Kazumi Fukagawa
  • Kenji Konomi
  • Jun Shimazaki
  • Teruo Nishida
  • Nobuhisa Mizuki
چکیده

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=4.0×10(-5), pc=1.6×10(-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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Association of −31T>C and −511 C>T polymorphisms in the interleukin 1 beta (IL1B) promoter in Korean keratoconus patients

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عنوان ژورنال:

دوره 19  شماره 

صفحات  -

تاریخ انتشار 2013