RPMI8226 cells were treated with control media (C), ACY-1215 (ACY, 2 µM), or MS275 (MS, 2 µM), in the absence or presence of CFZ (10 nM) for 16h. (A and C) Cell lysates were subjected to Immunoblotting with indicated Abs; CF, cleaved fragment. (B) Total RNA was extracted; XBP1 and β-actin mRNA were evaluated by RT-PCR.