Figure 4From: Panobinostat synergizes with bortezomib to induce endoplasmic reticulum stress and ubiquitinated protein accumulation in renal cancer cells The combination therapy induced ER stress and histone acetylation in renal cancer cells. The 48-hour treatment with the combination of panobinostat and bortezomib induced ER stress synergistically as indicated by the increased expression of GRP78, HSP70, ERp44, and Ero1-Lα (A). It also caused ubiquitinated protein accumulation in all the cell lines synergistically and enhanced histone and also α-tubulin acetylation in Caki-1 and ACHN cells. In 769-P cells, the combination enhanced the acetylation of α-tubulin but not that of histone (B). The dashed lines in the Caki-1 results in parts A and B indicate that the order of the bands has been rearranged from the original gel.Back to article page