MicroRNA profiling of colon cancer cells. (A) Hierarchical Clustering Analysis of differentially regulated miRNAs in the HCT-15, HT-29, SK-CO-1 and WiDr colon cancer cells as compared to cells of two normal colon tissues. (B) Volcano plot analysis. Green circles indicate minimum level of miRNA expression (log2FC < −1.5), black circles indicate average or weak miRNA expression, red circles indicate strong or maximum level of miRNA expression (log2FC > 1.5). FC: fold change.