Figure. 7.6. Representation of RA and DZNep effects on apoptosis regulation in human colon cancer cells.
Retinoic acid treatment promotes TRAIL-related apoptosis in RARβ/RARγ–positive HT29 cells, but not in SW480 cells which express only low levels of RARβ/RARγ. The functional depletion of PRC2 by either inhibition with DZNep or by knockdown of SUZ12 increases TRAIL-mediated apoptosis in both HT29 and SW480 cell lines. In this scenario the PRC2-mediated repression is alleviated, thereby activating TNFRSF10 even in the absence of RARβ/RARγ.