Correlation between gene polymorphisms of excision repair cross-complementing gene 1 and excision repair cross-complementing gene 2 and susceptibility to bladder cancer in Chinese population

Objective To investigate the relationship between single nucleotide polymorphisms of excision repair cross-complementing gene (ERCC) 1 (rs3212986) and ERCC2 (rs13181) gene and bladder cancer susceptibility in Chinese population. Methods A total of 194 patients with bladder cancer (case group) and 240 healthy subjects (control group) were enrolled. In the case group, there were 143 males and 51 females, 85 cases under 50 years old and 109 cases over 50 years old, body mass index (BMI) <25 154 cases and BMI ≥25 40 cases, 119 cases without smoking history and 75 cases with smoking history, 122 cases without drinking history and 72 cases with drinking history, 179 cases without family tumor history and 15 cases with family tumor history. In the control group, there were 145 males and 95 females; 121 cases under 50 years old and 119 cases over 50 years old, BMI <25 201 cases and BMI ≥25 39 cases, 176 cases without smoking history and 64 cases with smoking history, 169 cases without drinking history and 71 cases with drinking history, 224 cases without family tumor history and 16 cases with family tumor history. The genotypes of ERCC1 rs3212986 and ERCC2 rs13181 were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The relationship between each genotype and the risk of bladder cancer was explored. Results There was a statistically significant difference in the distribution of ERCC1 rs3212986 genotype between the two groups (χ2=6.010, P 0.05). Conclusion The ERCC1 rs3212986 gene polymorphism affects the occurrence of bladder cancer in the codominant and recessive models. The ERCC2 rs13181 gene polymorphism is not associated with the risk of bladder cancer. Key words: Bladder cancer; Gene polymorphism; Excision repair cross-complementing gene