Abstract
The case-control study aimed to investigate the association between the -31G>C polymorphism in the promoter of survivin gene and the susceptibility to sporadic colorectal cancer (CRC) in a Southern Chinese population. The study was carried out on 711 healthy controls and 702 CRC cases of a Southern Chinese population. Survivin gene -31G>C genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism. The association between CRC risk and -31G>C genetic polymorphism was estimated using an unconditional logistic regression model. The number of CC genotype carried in CRC patients was much higher than those of controls (P < 0.001). Compared with CC genotypes, GC, GG genotypes and -31G wild-type genotypes (i.e., GC + GG) had a significantly decreased risk of CRC (P < 0.001). In addition, survivin -31G wild-type genotypes were not associated with decreased risk of sporadic CRC patients with body mass index (BMI) ≥28.0 kg/m2, family cancer history, and premenopausal. Survivin -31G>C polymorphism is associated with sporadic CRC risk in the Southern Chinese population. The -31G wild-type genotypes and GC, GG genotypes are the independent protective factors against sporadic CRC excluding those with a BMI ≥28.0 kg/m2, family cancer history, and premenopausal.
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