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. 2020 Dec 7;21(23):9310. doi: 10.3390/ijms21239310

Figure 3.

Figure 3

The role of β-arrestin1 (ARRB1) in regulating self-renewal and progression of myeloproliferative neoplasms. (a) ARRB1 promotes p300-SP1 interaction and SP1 mediated transcription of human telomerase reverse transcriptase (hTERT). Thus, ARRB1 is important for telomerase activity preventing the onset of cellular senescence in leukemia stem cells (LSCs). (b) ARRB1 facilitates enhancer of zeste homologue 2 (EZH2)-mediated acetylation of BCR/ABL histone H4, promoting progression of chronic myeloid leukemia. (c) ARRB1 facilitates the DNMT1-mediated methylation of the PTEN promoter region, promoting epigenetic silencing of PTEN and generation of leukemia stem cells in B-lineage acute lymphoblastic leukemia.