Association between the TP53 Codon 72 Polymorphism and Risk of Nasopharyngeal Carcinoma: A Meta-analysis

Abstract

The associations of the P53 codon 72 polymorphism and risk of nasopharyngeal carcinoma (NPC) were inconclusive in several epidemiological studies. In order to get a more consistent result in these two, we conducted these 9 articles of the meta-analysis and systemic reviews to investigate relationships. An exhaustive search was conducted by us in PubMed and Embase databases up to March 2015. Only the studies consisting of NPC patients who were diagnosed by pathological methods were considered. The 95% confidence intervals (CIs) of odds ratios (ORs) were used to assess the association and Review Manager (RevMan) 5.2 software were used to perform statistical analyses. Consequently, there were nine studies were selected, which include 1,588 cases and 1,925 controls met the included criteria. Ultimately, systematic meta-analyses were used to extract relevant data and further analyze. The conclusions indicated that the persons who carried Pro/Pro genotype have an increased susceptibility of NPC compared with the persons who carried homozygote Arg/Arg genotype and heterozygote Arg/Pro [OR 0.59, 95% CI 0.48-0.72; OR 0.66, 95% CI 0.46-0.93]. For Arg allele, the persons with homozygote Pro/Pro genotype have an obviously increased susceptibility to NPC to the persons with an integrated Arg genotype (Arg/Pro + Arg/Arg) [OR 0.62, 95% CI 0.45-0.68]. For Pro allele, the conclusions showed the persons with Arg/Arg genotype have an obviously increased risk of NPC compared with the persons with an integrated Pro genotype (Arg/Pro + Pro/Pro) [OR 0.75, 95% CI 0.64-0.87]. To sum up, the conclusions of the meta-analysis indicate that Homozygote Pro/Pro genotype obviously increased NPC risk in the P53 codon 72; and Arg allele significantly decreased the susceptibility to NPC.