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• W2888387923 startingPage "355" @default.
• W2888387923 abstract "Myelodysplastic syndrome (MDS), a largely incurable hematological malignancy, is derived from aberrant clonal hematopoietic stem/progenitor cells (HSPCs) that persist after conventional therapies. Defining the mechanisms underlying MDS HSPC maintenance is critical for developing MDS therapy. The deacetylase SIRT1 regulates stem cell proliferation, survival, and self-renewal by deacetylating downstream proteins. Here we show that SIRT1 protein levels were downregulated in MDS HSPCs. Genetic or pharmacological activation of SIRT1 inhibited MDS HSPC functions, whereas SIRT1 deficiency enhanced MDS HSPC self-renewal. Mechanistically, the inhibitory effects of SIRT1 were dependent on TET2, a safeguard against HSPC transformation. SIRT1 deacetylated TET2 at conserved lysine residues in its catalytic domain, enhancing TET2 activity. Our genome-wide analysis identified cancer-related genes regulated by the SIRT1/TET2 axis. SIRT1 activation also inhibited functions of MDS HSPCs from patients with TET2 heterozygous mutations. Altogether, our results indicate that restoring TET2 function through SIRT1 activation represents a promising means to target MDS HSPCs." @default.
• W2888387923 created "2018-08-31" @default.
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• W2888387923 date "2018-09-01" @default.
• W2888387923 modified "2023-10-18" @default.
• W2888387923 title "SIRT1 Activation Disrupts Maintenance of Myelodysplastic Syndrome Stem and Progenitor Cells by Restoring TET2 Function" @default.
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• W2888387923 doi "https://doi.org/10.1016/j.stem.2018.07.018" @default.
• W2888387923 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6143172" @default.
• W2888387923 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30146412" @default.
• W2888387923 hasPublicationYear "2018" @default.
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