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Updated: Jan 21, 2026

Flow Cytometry to Estimate Leukemia Stem Cells in Primary Acute Myeloid Leukemia and in Patient-derived-xenografts, at Diagnosis and Follow Up
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Targeting cell membrane HDM2: A novel therapeutic approach for acute myeloid leukemia

Huafeng Wang1,2,3, Dandan Zhao2, Le Xuan Nguyen2,4

  • 1Department of Hematology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, PR China.

Leukemia
|July 25, 2019
PubMed

Insights

Membrane HDM2 (mHDM2) is exclusively found on AML blasts, not normal stem cells. Targeting mHDM2 with PNC-27 selectively kills leukemia cells, including stem cells, sparing normal cells.

Area of Science:

  • Oncology
  • Molecular Biology
  • Hematology

Background:

  • The E3 ligase human double minute 2 (HDM2) typically regulates p53 activity.
  • p53-independent HDM2 expression occurs on cancer cell membranes, but not normal cells.

Purpose of the Study:

  • To investigate the role and therapeutic potential of membrane HDM2 (mHDM2) in acute myeloid leukemia (AML).

Main Methods:

  • Characterization of mHDM2 expression in human and mouse AML blasts versus normal hematopoietic stem cells (HSCs).
  • Assessment of mHDM2 levels correlation with leukemia-initiating capacity, quiescence, and chemoresistance.
  • Evaluation of the synthetic peptide PNC-27's binding to mHDM2 and its downstream effects on E-cadherin and AML cell death.
  • In vivo efficacy studies using primary and secondary transplant models in human and murine AML.

Main Results:

  • mHDM2 is exclusively expressed on AML blasts, including leukemia stem cell (LSC)-enriched populations, but not on normal HSCs.
  • Higher mHDM2 levels correlate with increased leukemia-initiating capacity, quiescence, and chemoresistance in AML.
  • PNC-27 treatment induced AML blast and LSC death via mHDM2-E-cadherin interaction and necrobiosis, sparing normal HSCs in vivo.

Conclusions:

  • Membrane HDM2 (mHDM2) is a novel and specific therapeutic target for AML.
  • Targeting mHDM2 with PNC-27 selectively eliminates AML cells, including LSCs, with minimal toxicity to normal hematopoietic cells.

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