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. 2020 Nov 30;124(4):770–776. doi: 10.1038/s41416-020-01191-y

Fig. 4. Schematic model of epigenetic regulation in the generation and elimination of PI tolerance in MM cells.

Fig. 4

PI treatment induced MM cells to enter epigenetic alteration-mediated reversible tolerance. Exposure to further chemotherapy and selection can ‘lock in’ an epigenetic state, resulting in proliferation of a hardwired drug-resistant population. However, combination with HDAC inhibitors (HDACis) and high-dosage intermittent therapy can reverse epigenetic tolerance and prevent the emergence of PI-tolerant cells. TME tumour microenvironment, ECM extracellular matrix.