Investigation of the association between the CASP8 rs1045485 and SOD2 rs4880 single nucleotide polymorphisms (SNPs) with breast cancer

Introduction: Single nucleotide polymorphisms (SNPs) have been identified as prognostic markers that can influence the response to chemotherapy and, ultimately, the outcome of the disease. The objective of this study is to investigate the association between the rs1045485 and rs4880 variants and breast cancer. Methods: Ninety-nine cases and 81 healthy individuals (over 60 years old) were recruited from Iranian population. Genotyping of the rs1045485 and rs4880 polymorphisms was determined using the PCR-RFLP molecular method. The obtained results were then evaluated using the SPSS 23.0, odds ratios (ORs) with 95 % confidence intervals (95 %CIs). Results: The average age of the subjects was 50.17 +/- 1.8 years, with age ranging from 40 to 76 years. Additionally, more patients were in stage and grade 2 of the disease. Furthermore, 51.73 %, 53.24 % and 41.48 % of patients tested positive for ER, PR and HER2 status, respectively. The odds ratios of the genotypes studied for each of the two variants were not statistically significant. Additionally, all models (dominant, codominant, recessive and over dominant) also indicated that this difference was not significant (p > 0.05). Investigation of the association between the CASP8rs1045485 and SOD2 rs4880 variants with clinicopathological status were not revealed a significant relationship. The Hardy-Weinberg test showed that the evaluated population was balanced (p > 0.05). Conclusion: In the studied models of both polymorphisms, no significant correlation was found between the genotypes and the conditions of estrogen, progesterone and Her2 receptors, as well as the stage and grade of the disease.