Similarly, re-analysis of gene expression microarray data deposited in Gene Expression Omnibus Database (GEO-NCBI) from three independent studies using breast cancer cell lines (MCF7—accession number GSE55204, MDA-MB-231—accession number GSE25741 and BT-20—accession number GSE2222) revealed that FOXM1 silencing was not capable of altering both UBE2C and PLK1 gene expression (Supplementary Materials, Figure S1). This evidence concerns the gene PLK1 and breast carcinoma.