Increasing radiation time in MCF-7 cancer cells and activating pathways related to type 1 diabetes mellitus

Breast cancer is one of the most common cancers among women. Since microarray is a new method in cancer diagnosis, in the current study, the microarray library of MCF-7 breast cancer cells after irradiation was examined to predict the gene expression pattern and metabolic pathways related to it.Materials and Methods Microarray data extracted from National Center for Biotechnology Information (NCBI) related to MCF-7 cells were analyzed by GEO2R and R software. Then the genes that had increased and decreased expression were extracted and gene ontology analysis was performed using DAVID and Enrichr databases.

In this study, after 48 hours of irradiation, 234 genes with Log2FC>1 increased expression and 146 genes with Log2FC<-1 decreased expression (Adjusted p value <0.05). KEGG analysis on genes with increased expression showed that these genes are related to type 1 diabetes (P=2.43E-04). The genes extracted in this pathway included HLA-DRB5, HLA-DRB4, CPE, TNF, HLA- DRB1 and HLA-DM (Adjusted p value <0.05). Also, the findings show that the genes involved in type 1 diabetes in the islets of Langerhans include CPE, MHC-II, and TNF-α.

The findings of this study showed that the increase in irradiation time in breast cancer cells probably leads to the activation of pathways related to type 1 diabetes through CPE, MHC-II and TNF-α genes in the islets of Langerhans.