CTTN and hepatocellular carcinoma: Control (CON) or CTTN-overexpressing (CTTN) SKBR3 cells and control (shCON) or CTTN-knockdown (shCTTN) HCC-1954 cells were injected into the mammary fat pads of NOD/SCID mice at doses ranging from 1000 to 100,000 cells.