Abstract
In Taiwan, oral cancer is causally associated with environmental carcinogens. Survivin is an anti-apoptotic protein and is generally considered a marker of malignancy. The current study explored the combined effect of survivin gene polymorphisms and environmental carcinogens on the risk and clinico-pathological development of oral cancer. Five single-nucleotide polymorphisms (SNPs) of survivin genes from 439 male patients with oral cancer and 424 male control participants (who did not have cancer) were analyzed. The survivin −31GG, +9194 GG, and +9809 TT homozygotes exhibited higher risk for oral cancer compared with the corresponding ancestral genotype, after adjustment for related confounders. The survivin −31, +9194, and +9809 SNPs combined with betel quid chewing and/or tobacco consumption could robustly elevate susceptibility to oral cancer. The distribution frequency of the −31 G: +9194 A: +9809 T haplotype was significantly higher in oral cancer patients than in control participants. These results suggest that survivin gene polymorphisms and their interactions with environmental carcinogens may increase susceptibility to oral cancer in Taiwanese men. Abbreviations: AOR, adjusted odds ratio; CI, confidence intervals; PCR, polymerase chain-reaction; SNP, single-nucleotide polymorphisms.
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