Helicobacter pylori seropositivity and IL-1B C-31T polymorphism among Japanese Brazilians

  • Authors:
    • Miyuki Uno
    • Nobuyuki Hamajima
    • Lucy S. Ito
    • Sueli M. Oba
    • Suely K.N. Marie
    • Samuel K. Shinjo
    • Hiroyuki Onda
    • Toshiko Saito
    • Toshiro Takezaki
    • Kazuo Tajima
    • Suketami Tominaga
  • View Affiliations

  • Published online on: September 1, 2002     https://doi.org/10.3892/ijmm.10.3.321
  • Pages: 321-326
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Abstract

We reported previously that anti-Helicobacter pylori antibody seropositivity (HP+) had an association with interleukin 1B (IL-1B) C-31T genotype, especially among smokers. This study examined the association for Japanese Brazilians. In this cross-sectional study, voluntary participation was announced through Japanese Brazilian communities in Sao Paulo, Curitiba, Mogi das Cruzes, and Mirandopolis; 963 Japanese Brazilians (399 males and 564 females) aged 33-69 years participated. Lifestyle data and peripheral blood were collected. An anti-HP IgG antibody test and genotyping for IL-1B C-31T and IL-1RN 86 bp VNTR were independently conducted. The genotype frequency of the IL-1B polymorphism among 947 individuals was 23.9% for C/C genotype, 45.6% for C/T genotype, and 30.5% for T/T genotype. Sex-age-adjusted odds ratio (aOR) of HP+ was 1.30 (95% confidence interval, 0.94-1.81) for C/T genotype and 1.45 (1.02-2.07) for T/T genotype relative to C/C genotype. The aOR for 127 current smokers was 2.45 (0.91-6.55) for C/T and 3.49 (1.17-10.46) for T/T, while that for 667 never smokers was 1.21 (0.82-1.78) and 1.36 (0.90-2.05), respectively. The corresponding figures were 2.42 (1.16-5.02) and 3.00 (1.33-6.78) for 226 current drinkers, and 1.21 (0.82-1.78) and 1.36 (0.90-2.05) for 667 non-drinkers. The difference in the OR was observed for milk consumption, salty pickled vegetable eating, and physical exercise practice. 4/4 Genotype of IL-1RN 86 bp VNTR was 84.8%, and had no association with the HP seropositivity. The observed association between HP+ and IL-1B -31TT indicated that the genetic trait also influences the susceptibility to HP for Japanese in Brazil.

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September 2002
Volume 10 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Uno M, Hamajima N, Ito LS, Oba SM, Marie SK, Shinjo SK, Onda H, Saito T, Takezaki T, Tajima K, Tajima K, et al: Helicobacter pylori seropositivity and IL-1B C-31T polymorphism among Japanese Brazilians. Int J Mol Med 10: 321-326, 2002
APA
Uno, M., Hamajima, N., Ito, L.S., Oba, S.M., Marie, S.K., Shinjo, S.K. ... Tominaga, S. (2002). Helicobacter pylori seropositivity and IL-1B C-31T polymorphism among Japanese Brazilians. International Journal of Molecular Medicine, 10, 321-326. https://doi.org/10.3892/ijmm.10.3.321
MLA
Uno, M., Hamajima, N., Ito, L. S., Oba, S. M., Marie, S. K., Shinjo, S. K., Onda, H., Saito, T., Takezaki, T., Tajima, K., Tominaga, S."Helicobacter pylori seropositivity and IL-1B C-31T polymorphism among Japanese Brazilians". International Journal of Molecular Medicine 10.3 (2002): 321-326.
Chicago
Uno, M., Hamajima, N., Ito, L. S., Oba, S. M., Marie, S. K., Shinjo, S. K., Onda, H., Saito, T., Takezaki, T., Tajima, K., Tominaga, S."Helicobacter pylori seropositivity and IL-1B C-31T polymorphism among Japanese Brazilians". International Journal of Molecular Medicine 10, no. 3 (2002): 321-326. https://doi.org/10.3892/ijmm.10.3.321