Impacts of RETN genetic polymorphism on breast cancer development in Beni-Suef females, Egypt.

Breast cancer is the most common cancer among females with increasing incidence and death rates. Resistin is pro-inflammatory molecule which shares in diverse cellular signaling pathways. This study aimed to evaluate resistin and RETN rs3219175 gene polymorphism and their relevance to diagnostic susceptibility, prognostic value, and genetic risk among Egyptian female patients with breast cancer. Eighty female patients with breast cancer were recruited from the Oncology Department, Faculty of Medicine, Beni-Suef University. Breast cancer staging and grading were determined. Eighty age-matched normal females participated as controls. Quantitative determination of serum resistin was assayed by an enzyme-linked immunosorbent assay (ELISA). RETN rs3219175 gene polymorphism was determined by real time polymerase chain reaction (RT-PCR) TaqMan allelic discrimination assay. Serum resistin showed statistically significantly higher level among females with breast cancer when compared to controls (p < 0.001). Resistin showed sensitivity of 80% and specificity of 67.5% at cut off value of 1.27 ng/mL for diagnosis of breast cancer (p =0.001). RETN rs3219175 gene polymorphism showed significantly higher frequency of AG, AA genotypes, and A allele among cases when compared to controls (p < 0.001). No statistical difference was found in resistin level or RETN rs3219175 gene polymorphism regarding tumor characteristics including size, lymph nodes or distant metastasis. Resistin showed significantly higher level among carriers of AG followed by AA genotypes and among A allele (p < 0.001). In conclusion, resistin could be proposed as a possible potential diagnostic marker and A allele of RETN rs3219175 gene might be suggested as a genetic risk allele among female patients with breast cancer.