title: Interleukin-10 gene promoter polymorphisms and the risk of nasopharyngeal carcinoma.
abstract: Genetic factors are known to be important in the development of nasopharyngeal carcinoma (NPC). Interleukin-10 (IL-10) is an immunosuppressive cytokine which may facilitate development of cancer by supporting tumor escape from the immune response. Interindividual variations in IL-10 production were genetically contributed to polymorphisms within IL-10 promoter region. The aim of this study was to determine whether single nucleotide polymorphisms (SNPs) at positions -1082 (A/G), -819 (T/C) and -592 (A/C) in the IL-10 gene promoter were involved in predisposing an individual to NPC. One hundred and ninety-eight patients with NPC and 210 age- and sex-matched controls, genotypes were determined using polymerase chain reaction-restriction fragment length polymorphism. There were significantly differences in the genotype and allele distribution of -1082 A/G polymorphism of the IL-10 gene among cases and controls. The -1082 AG and GG genotypes were associated with a significantly increased risk of NPC as compared with the -1082 AA genotypes. Haplotype analysis showed that the homozygosity of the GCC haplotype (defined by SNPs at positions -1082, -819 and -592) of IL-10 gene conveys the highest risk for NPC compared with the homozygosity for the ATA haplotype. This study shows for the first time an association between IL-10 gene promoter -1082 A/G polymorphism and its haplotype may contribute to genetic susceptibility to NPC in a Chinese population.
authors.affiliation: Department of Immunology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, Sichuan, China.
authors.forename: Y-S
authors.initials: YS
authors.lastname: Wei
authors.forename: X-H
authors.initials: XH
authors.lastname: Kuang
authors.forename: Y-H
authors.initials: YH
authors.lastname: Zhu
authors.forename: W-B
authors.initials: WB
authors.lastname: Liang
authors.forename: Z-H
authors.initials: ZH
authors.lastname: Yang
authors.forename: S-H
authors.initials: SH
authors.lastname: Tai
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: L
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000328:Adult; D000483:Alleles; D002277:Carcinoma / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006720:Homozygote; D006801:Humans; D016753:Interleukin-10 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000175:diagnosis / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012189:Retrospective Studies; D012307:Risk Factors
chemical_list: D016753:Interleukin-10