(A,B) Cells transiently transfected with vector or constitutively active IKKβ-EE were transfected with the indicated siRNAs (72h; #1), serum-starved, and lysates blotted (A), or Gaussia luciferase secretion measured in the media from siRNA-transfected cells expressing cathepsin L or B promoter-luciferase constructs (B). Graphs are Mean±SEM, n=3. ***p<0.001; **p≤0.01; *p<0.05 using two-sample t-tests and Holm’s adjustment for multiple comparisons. (C) Cells transfected with scrambled or two independent p65 siRNAs, were treated with vehicle or nilotinib (16h), and lysates blotted. (D) Nilotinib treated cell lysates were blotted. pCrkL blots demonstrate efficiency of Abl/Arg inhibition by nilotinib.