سمانه سادات شهیدی - Department of Medical Genomics Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
زهرا طهماسبی فرد - Department of Biology, Roudehen Branch, Islamic Azad University, Roudehen, Iran

Background & Objective: Breast cancer is a phenotypically complex and diverse genetic disease caused by changes in the structure and expression of specific genes. Immune system factors are also involved in the etiology of this neoplasm. This study aimed to evaluate the effect of genetic changes (rs۲۲۴۳۲۵۰ & rs۲۲۲۷۲۸۴) on the interleukin ۴ gene and body mass index on breast cancer risk in Iranian women. Material & Methods: From women referring to Shohada-Tajrish Hospital, ۱۰۰ women with breast cancer and ۱۰۰ healthy women were selected. After blood sampling and DNA extraction, the women’s genotypes were determined using the RFLP-PCR technique. The results were evaluated by SPSS software version ۲۱ and chi-square and logistic regression tests. Results: Analysis of the results with different genetic models showed the effect of rs۲۲۴۳۲۵۰ on breast cancer (p<۰.۰۵), but rs۲۲۲۷۲۸۴ was not associated with breast cancer (p>۰.۰۵). People with the CC / TT genotype (polymorphism) were more likely to get breast cancer. Also, the increase in body mass index was significantly associated with both polymorphisms studied. Also, carriers of the TT genotype of rs۲۲۴۳۲۵۰ polymorphism were more likely to develop breast cancer with aging. Conclusion: Genetic alterations in the IL-۴ gene and obesity probably contribute to breast cancer, and carriers of both genetic modifications (CC / TT) are more likely to develop breast cancer.

Interleukin ۴, rs۲۲۴۳۲۵۰, rs۲۲۲۷۲۸۴, Breast Cancer, Polymorphisms