The shRNA expression vector for silencing YB-1 (pGPU6/GFP/Neo-YBX1- -homo-746 with the target sequence GGTTCCCACCTTACTACAT; pGPU6/GFP/Neo-YBX1-homo-326 with the target sequence AGAAG -GTCATCGCAACGAA) and negative control vector (pGPU6/GFP/Neo-shNC) contain a selectable marker GFP.