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Transformation from committed progenitor to leukemia stem cells.

Andrei V Krivtsov1, Zhaohui Feng, Scott A Armstrong

  • 1Division of Hematology/Oncology, Children's Hospital, Department of Pediatric Oncology, Dana Farber Cancer Institute, and Harvard Medical School, Boston, Massachusetts 02215, USA.

Annals of the New York Academy of Sciences
|October 3, 2009
PubMed
Summary
This summary is machine-generated.

Mixed lineage leukemia (MLL) fusion proteins grant stem cell properties to blood progenitors, driving leukemic self-renewal. This study examines the cellular and molecular changes during this critical transition in leukemia development.

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Area of Science:

  • Hematology
  • Cancer Biology
  • Molecular Genetics

Background:

  • Leukemias originate from a cellular hierarchy with a small fraction possessing stem cell-like self-renewal.
  • Mixed lineage leukemia (MLL) gene rearrangements at 11q23 are implicated in leukemogenesis.

Purpose of the Study:

  • To investigate how MLL fusion proteins induce stem cell-like properties in hematopoietic progenitors.
  • To analyze the immunophenotypic, gene expression, and epigenetic alterations during the development of leukemic self-renewal.

Main Methods:

  • Analysis of immunophenotype.
  • Gene expression profiling.
  • Epigenetic program assessment.

Main Results:

  • MLL fusion proteins confer self-renewal capacity to committed hematopoietic progenitors.
  • Characterization of cellular and molecular changes associated with leukemic transformation.

Conclusions:

  • MLL fusion proteins are key drivers of leukemic stem cell generation.
  • Understanding this transition offers insights into leukemia pathogenesis and potential therapeutic targets.