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Related Experiment Video

Updated: Jan 2, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
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Mutant p53 drives clonal hematopoiesis through modulating epigenetic pathway.

Sisi Chen1,2, Qiang Wang3, Hao Yu2

  • 1Department of Biochemistry and Molecular Biology, Indiana University, Indianapolis, IN, 46202, USA.

Nature Communications
|December 13, 2019
PubMed
Summary

Mutant p53 promotes clonal hematopoiesis by interacting with EZH2, an epigenetic regulator. Inhibiting EZH2 reduces the expansion of these cells, offering a potential therapeutic target for TP53-mutated hematological malignancies.

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Area of Science:

  • Hematology
  • Epigenetics
  • Cancer Biology

Background:

  • Clonal hematopoiesis of indeterminate potential (CHIP) is age-related and increases risks of blood cancers.
  • TP53 mutations are found in CHIP, but mechanisms driving hematopoietic stem and progenitor cell (HSPC) expansion remain unclear.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which mutant p53 drives CHIP.
  • To identify potential therapeutic targets for TP53-mutated hematological malignancies.

Main Methods:

  • Investigated mutant p53's effect on HSPC expansion in transplantation and post-radiation models.
  • Examined mutant p53 interaction with EZH2 and its impact on H3K27me3 levels.
  • Utilized genetic and pharmacological inhibition of EZH2.

Main Results:

  • Mutant p53 confers a competitive advantage to HSPCs, promoting their expansion.
  • Mutant p53 enhances EZH2's chromatin association, increasing H3K27me3 in self-renewal and differentiation genes.
  • Inhibiting EZH2 reduced the repopulating potential of p53 mutant HSPCs.

Conclusions:

  • Mutant p53 drives CHIP through an epigenetic mechanism involving EZH2.
  • EZH2 is a potential therapeutic target for preventing CHIP progression and treating TP53-mutated hematological malignancies.