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Related Concept Videos

Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

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...
Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Notch Signaling Pathway03:14

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
Notch Signaling Pathway03:14

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...

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Retroviral Infection of Murine Embryonic Stem Cell Derived Embryoid Body Cells for Analysis of Hematopoietic Differentiation
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Cell signalling pathways that mediate haematopoietic stem cell specification.

Jonathon Marks-Bluth1, John E Pimanda

  • 1Lowy Cancer Research Centre and the Prince of Wales Clinical School, University of New South Wales, Sydney, NSW 2052, Australia.

The International Journal of Biochemistry & Cell Biology
|September 22, 2012
PubMed
Summary
This summary is machine-generated.

This review explores cell signaling pathways crucial for hematopoietic stem cell (HSC) development. It highlights recent discoveries and remaining questions in blood cell formation research.

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Area of Science:

  • Hematology
  • Developmental Biology
  • Cell Signaling

Background:

  • Haematopoiesis, the process of blood cell formation, is well-studied.
  • Mechanisms of hematopoietic stem cell (HSC) development and specification remain incompletely understood.
  • Interactions between signaling pathways and transcription factors in HSC specification require further elucidation.

Purpose of the Study:

  • To review recent advances in understanding cell signaling pathways in HSC development.
  • To identify knowledge gaps in HSC specification and differentiation.
  • To discuss the implications of current knowledge for laboratory-based blood cell generation.

Main Methods:

  • Literature review focusing on cell signaling and transcription factors in HSC development.
  • Analysis of developmental ontogeny of HSCs.
  • Examination of implicated cell signaling pathways in HSC specification.

Main Results:

  • Recent advances have shed light on key signaling pathways driving HSC development.
  • Significant gaps persist in understanding the intricate crosstalk between signaling pathways and transcription factors.
  • Progress has been made in generating blood cells ex vivo.

Conclusions:

  • Understanding cell signaling is critical for deciphering HSC development.
  • Further research is needed to fully map the complex regulatory networks governing HSC specification.
  • Laboratory generation of blood cells represents a significant advancement with therapeutic potential.