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The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
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Differentiation of Common Myeloid Progenitor Cells01:15

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Preleukemic stem cells: leave it or not?

Minhua Su1,2, Hui Cheng1,2,3,4, Tao Cheng1,2,3,4

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Blood Science (Baltimore, Md.)
|April 11, 2022
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Summary
This summary is machine-generated.

Preleukemic hematopoietic stem cells (HSCs) acquire mutations years before acute myeloid leukemia (AML) develops. These cells can survive chemotherapy, potentially leading to AML relapse or new cases.

Keywords:
Acute myeloid leukemiaAge-related clonal hematopoiesisClonal evolutionPreleukemic stem cells

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Area of Science:

  • Hematology
  • Oncology
  • Stem Cell Biology

Background:

  • Acute myeloid leukemia (AML) develops from accumulated mutations in hematopoietic stem cells (HSCs).
  • Preleukemic HSCs, carrying some but not all leukemia-associated mutations, precede overt AML.
  • Similar mutations are observed in healthy aging adults as age-related clonal hematopoiesis.

Purpose of the Study:

  • To elucidate the role of preleukemic HSCs in the development of AML (leukemogenesis).
  • To discuss the implications of preleukemic HSCs in cancer relapse and de novo AML.
  • To explore potential therapeutic strategies targeting preleukemic HSCs.

Main Methods:

  • Review of existing literature on somatic mutations in HSCs.
  • Analysis of studies investigating the behavior of preleukemic HSCs.
  • Discussion of the clinical significance of age-related clonal hematopoiesis.

Main Results:

  • Preleukemic HSCs can persist through chemotherapy.
  • These persistent cells are implicated in AML relapse and the development of new AML cases.
  • The presence of acquired mutations in HSCs is not exclusive to preleukemic states but also occurs in healthy aging individuals.

Conclusions:

  • Preleukemic HSCs play a critical role in leukemogenesis.
  • Understanding preleukemic HSC behavior is crucial for preventing AML relapse and de novo disease.
  • Further research is needed to determine optimal therapeutic or preventive interventions for individuals with preleukemic HSCs.