Objective: To investigate the biological significance of single nucleotide polymorphism (SNP) at murine double-minute 2 homolog (MDM2) promoter 309 in cervical carcinogenesis.
Methods: SNP at MDM2 promoter 309 (T/G) together with human papillomavirus (HPV) types was examined in a total of 195 cervical smear samples and 8 human cervical squamous carcinoma cell lines using two independent PCR assays and PCR-RFLP techniques.
Results: Forty-one patients with high-grade squamous intraepithelial lesion (HSIL) had higher frequency of high-risk HPV than 102 with low-grade SIL (LSIL) and 52 controls. There was an increased OR (8.88; CI=2.34-33.63; P=0.003) for TG+GG genotype in HSIL cases compared to controls among 68 patients with high-risk HPV. Twenty-one cases with HPV types 16 and/or 18 had significantly higher frequency of the TG+GG genotype and G allele than 47 with other types of high-risk HPV. Seven of 8 cervical carcinoma cell lines also showed TG or GG genotype.
Conclusion: MDM2-SNP309 (T/G) and high-risk HPV infection may be closely associated with cervical carcinogenesis in a Japanese population.
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