sentence: To identify genes regulated by WHSC1L1 in SCCHN cells , we performed a cDNA microarray in two SCCHN cell lines ( UD-SCC-2 , YD-10B ) after treatment of cells with a control siRNA ( siNC ) and two WHSC1L1 specific siRNAs ( siWHSC1L1 # 1 and siWHSC1L1 # 2 ) .