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  • Title: Genetic variants in HLA-DP/DQ contribute to risk of cervical cancer: a two-stage study in Chinese women.
    Author: Jiang J, Li N, Shen Y, Liu J, Liu L, Du J, Lei Y, Wen Y, Yang L, Guo L, Zhang K, Qiang F, Wang S, Hu Z, Dai M, Shen H.
    Journal: Gynecol Oncol; 2013 May; 129(2):401-5. PubMed ID: 23428460.
    Abstract:
    OBJECTIVE: Human leukocyte antigens (HLA) play an important role in presenting virus antigens to immune cells that are responsible for the clearance of virus-infected cells and tumor cells. Herein, we evaluated whether genetic variants of HLA-DP and HLA-DQ are associated with cervical cancer risk. METHODS: We genotyped four single nucleotide polymorphisms (SNPs) in HLA-DP (rs3077 and rs9277535) and HLA-DQ (rs2856718 and rs7453920) in a two-stage case-control study with a total of 2317 cervical cancer cases and 2109 cancer-free controls using TaqMan allelic discrimination assay. RESULTS: We found consistently significant associations of HLA-DP rs3077 and rs9277535 with increased risks of cervical cancer (dominant genetic model: adjusted OR=1.51, 95% CI=1.32-1.71 for rs3077; adjusted OR=1.29, 95% CI=1.12-1.49 for rs9277535). When combining the effects of HLA-DP rs3077 and rs9277535, subjects carrying "≥1" variant alleles had a 1.55-fold increased risk of cervical cancer (95% CI=1.32-1.81), compared with those carrying "0" variant allele. And cervical cancer risk significantly increased with the increasing number of variant alleles of the two SNPs in a dose-dependent manner (P for trend=4.33×10(-10)). However, there were no significant associations for HLA-DQ rs2856718 and rs7453920 in our population. CONCLUSIONS: These findings indicate that HLA-DP rs3077 and rs9277535 were candidate susceptibility markers for cervical cancer in Chinese females. Further validation studies with different ethnic background, biological function analyses and especially HPV typing together were needed.
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