Yea Sung Su, Yang Young-Il, Park Seong Kook, Jang Won Hee, Lee Sang Seop, Seog Dae-Hyun, Park Yeong-Hong, Chun Jin Ho
Department of Biochemistry, Inje University College of Medicine, Busan, Korea.
Am J Rhinol. 2006 Sep-Oct;20(5):550-3. doi: 10.2500/ajr.2006.20.2936.
Although many studies have implicated interleukin (IL)-4 promoter polymorphisms as potential determinants of disease susceptibility, there are no reports on the association between IL-4 promoter polymorphisms and nasal polyps. The aim of this study was to investigate the relationship between an IL-4 promoter polymorphism and nasal polyps.
The C-590T promoter polymorphism of the IL-4 gene was genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis in 106 Korean chronic rhinosinusitis patients with or without nasal polyps and 70 healthy Korean subjects.
The frequency of the T allele at position -590 of the IL-4 gene in a Korean population was 0.85, which was significantly higher than those of other ethnic groups, and the T/T allele at position -590 of IL-4 was associated with protection against nasal polyps if compared with the C/C allele (relative risk, 0.529; 95% confidence interval, 0.307-0.912; p = 0.028).
T-590, which is dominant at position -590 of the IL-4 promoter, appears to be associated with a protective mechanism against nasal polyps in Korean populations.
