tokens: However , in 468 . MUC1 Delta 8 cells , the level of apoptosis after luciferase siRNA ( 34 . 1 % ) is lower than that in 468 . Neo cells ; MUC1 siRNA increases the amount of apoptosis slightly ( 42 . 8 % ) , restoring it to a level similar to that seen in luciferase siRNA - treated 468 . Neo cells .