Role of ATG16LI (rs2241880) and Interleukin 10 (rs1800872) Polymorphisms in Breast Cancer among Egyptian Patients.

This study was performed to determine the role of autophagy-related 16-like 1 (ATG16L1, rs2241880) and IL10 (rs1800872) polymorphisms in the susceptibility to and early prediction of breast cancer in Egyptians. The study included 50 breast cancer patients and 50 apparently healthy controls. The PCR-RFLP technique was used to detect ATG16L1 (rs2241880) and IL10 (rs1800872) genotypes. IL10 level was determined in serum by ELISA. The mean age of the patients was 54.2 years. Among the patients, 80% had no family history for breast cancer, 70% were postmenopausal, and 72% exhibited grade II tumors. Metastasis was detected in 18% of the patients, and 6% of the cases exhibited triple-negative receptor (TNR) status. In the ATG16LI (rs2241880) gene, the GG genotype frequency was significantly higher in patients than in controls (14% in patients versus 2% in controls, P =0.02), and no metastasis was observed in patients with the AA genotype (P=0.03). In the IL10 (rs1800872) gene, the A allele was observed in 30% of patients and 23% of controls, but the difference was insignificant (P=0.26). Also, the prevalence of the AA genotype was 8% in patients and 4% in controls (P=0.54). Serum IL10 levels were higher in patients than in controls (P < 0.001). Within the patient group, individuals with the IL10 (rs1800872) AA genotype showed significantly higher serum IL10 levels than those with the CC and CA+CC genotypes (P =0.03 and 0.04, respectively). In conclusion, in Egyptian breast cancer patients, the GG genotype of ATG16LI (rs2241880) may be associated with increased disease risk, and the AA genotype could be protective against metastasis.