cells were seeded into 6 cm plates and incubated overnight. Following
the treatment of DOK cells with BAK, Stattic, or Wortmannin, cell
lysates were obtained and lysed in an RIPA buffer containing a proteinase
inhibitor. The protein lysates were loaded onto SDS-PAGE, and proteins
were transferred onto PVDF membranes and reacted with primary antibodies
followed by secondary antibodies (Jackson, USA). Finally, the signals
were amplified by ECL (Perkin Elmer, USA), imaged by ChemiDoc XRS+
System (BioRad, USA) and quantified by Image Lab software (BioRad,
USA). Primary antibodies against pSTAT3(Tyr705), STAT3, pAkt(Ser473),
Akt, cleaved caspase-3, cleaved caspase-9, cleaved caspase-7, cleaved
PARP, γH2AX, and beta-Actin (GeneTex, USA) were used for Western
blotting.