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BMC Cancer  2010 

Association of genetic polymorphisms in the interleukin-10 promoter with risk of prostate cancer in Chinese

DOI: 10.1186/1471-2407-10-456

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We genotyped three SNPs of the IL-10 promoter (-1082A/G, -819T/C and -592A/C) using polymerase chain reaction-restriction fragment length polymorphism analysis in 262 subjects with PCa and 270 age-matched healthy controls. Odds ratio and 95% confidence interval were determined by logistic regression for the associations between IL-10 genotypes and haplotypes with the risk of PCa and advanced PCa grade.No significant differences in allele frequency or genotype distribution were observed for any of the IL-10 SNPs between PCa patients and control subjects. Significantly higher frequencies of -1082G, -819C and -592C allele and GCC haplotype were observed, however, in early stage patients in comparison to advanced PCa patients (for -1082 G, 13.9% vs 6.1%, OR = 2.48, P = 0.005; for -819 C 40.3% vs 30.8%, OR = 1.51, P = 0.043; for -512C, 40.3% vs 30.8%, OR = 1.51, P = 0.043; and for haplotype GCC 11.1%vs 5.1%, OR = 2.66, P = 0.008, respectively).Our results identify that IL-10 promoter polymorphisms might not be a risk factor for PCa in Chinese cohorts, but rather incidence of polymorphisms associates with PCa grade, suggesting that IL-10 expression may impact PCa progression.Prostate cancer (PCa) is among the most common malignant tumors in Western males, ranking second only to lung cancer in cancer mortality [1]. PCa incidence in Asian men is significantly lower, however, the incidence of PCa in China has increased significantly in recent years [2]. While age, ethnicity, diet, and geographic factors are believed to contribute to the etiology of this disorder [3-5], genetic variations may play a role in susceptibility to PCa [6]. Recent studies suggest that genetic polymorphisms of genes involved in innate immunity and chronic inflammation, including the anti-inflammatory cytokine Interleukin-10 (IL-10), may impact susceptibility to PCa [6].IL-10 is produced primarily by macrophages and T lymphocytes. It has important anti-inflammatory and immunosuppressive activities, in


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