A case–control study on effects of the ATM, RAD51 and TP73 genetic variants on colorectal cancer risk

Abstract

Abstract Aim ATM, RAD51 and TP73 are genes that take part in DNA repair pathways. The aim of this prospective case-control study was to determine the genotype and allele distributions of the ATM 5′-UTR G/A, RAD51 135 G/C and TP73 GC/AT polymorphisms and their relationship with clinical parameters in Turkish colorectal cancer (CRC) patients. Material and methods One hundred and four CRC patients and 113 healthy individuals were included in this study as control. The polymerase chain reaction-restriction fragment length polymorphism techniques were used. Results The ATM 5′-UTR G/A polymorphism GG (p = 0.001) and AA (p = 0.0001) genotypes were found higher in the patient group, while the GA genotype (p = 0.0001) and A allele (p = 0.001) were significantly higher in the control group. Moreover, the GG genotype (p = 0.042) was higher among patients with advanced-stage cancer and, while GA genotype (p = 0.047) was increased in patients without perineural invasion. The RAD51 135 G/C polymorphism GC genotype (p = 0.0001) and C allele (p = 0.0001) were significantly higher in the patient group, while CC genotype (p = 0.0001) was higher in the control group. No statistical significance was observed between the TP73 GC/AT polymorphism genotype and allele distribution and the clinical parameters. Conclusion In the Turkish population, the ATM 5′-UTR GG and AA genotypes, and the RAD51 135 G/C GC genotype and the C allele presence may be risk factors for CRC.