Department of Surgery, China Medical University Beigang Hospital, Yunlin, Taiwan.
The interleukin-18 (IL-18) encoding gene has three common single-nucleotide polymorphisms at -607C/A, -137G/C and +105A/C, which have been reported to be associated with several diseases. The aim of this study is to test whether IL-18 polymorphisms could act as genetic markers for renal stone disease.
A control group of 104 healthy subjects, and 272 patients with recurrent calcium oxalate stones were examined. Polymerase chain reaction-based restriction endonuclease analysis was used to detect IL-18 polymorphisms.
The patient and control groups differed significantly in genotypic expression of the IL-18 +105A/C polymorphism. The prevalence of the A/C + C/C genotypes in the patients was higher than that in the controls. The allelic frequency of IL-18 +105A/C differed significantly between the patients and the controls. The odds ratio (OR) of the A/C heterozygote of IL-18 +105A/C associated with urolithiasis was 2.772. The OR of the A/C + C/C genotypes of IL-18 +105A/C associated with urolithiasis was 3.097. The OR per copy of the C allele of IL-18 +105A/C associated with urolithiasis was 4.143. There were also significant differences in the prevalence of genotype IL-18 -137G/C polymorphisms between the patients and controls. The distribution of the G/G homozygote in the patients was higher than that in the controls. There was no significant difference in genotype and allelic frequency at the IL-18 -607C/A polymorphism between patients and control subjects.
The results indicate that IL-18 +105A/C polymorphisms may play a role in the development of urolithiasis.
Written by:
Lai KC, Lin WY, Man KM, Tsai CH, Chen HY, Tsai FJ, Chen FJ, Chen HY, Liu HP, Ho TJ, Huang PH, Liu PL, Lin FY, Shen JL, Liu JT, Chen YH, Chen WC. Are you the author?
Reference:
Scand J Urol Nephrol. 2009 Dec 18. Epub ahead of print.
PubMed Abstract
PMID:20017708
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