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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...
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...
Hematopoiesis01:21

Hematopoiesis

The process of blood cell formation is called hematopoiesis. Hematopoiesis starts early during development, on the seventh day of embryogenesis. This phase of hematopoiesis is called the primitive wave, wherein the extraembryonic yolk sac allows the production of erythroid cells and endothelial cells from a common precursor called hemangioblast. The erythroid cells provide oxygen to support the growth of the rapidly dividing embryo. Hemangioblasts later develop into hematopoietic stem cells or...
Lineage Commitment01:21

Lineage Commitment

Commitment is the  process whereby stem cells:

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Lentiviral CRISPR/Cas9-Mediated Genome Editing for the Study of Hematopoietic Cells in Disease Models
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A recessive screen for genes regulating hematopoietic stem cells.

Peter Papathanasiou1, Robert Tunningley, Diwakar R Pattabiraman

  • 1Australian Phenomics Facility, John Curtin School of Medical Research, Australian National University, Acton, ACT, Australia. peter.papathanasiou@gmail.com

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Summary

Researchers identified genes crucial for blood stem cell development using a novel mouse screening method. This approach efficiently uncovers mutations affecting hematopoiesis, advancing regenerative medicine and cancer research.

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Area of Science:

  • Stem cell biology
  • Hematopoiesis
  • Developmental biology

Background:

  • Understanding stem cell regulation is key for organogenesis, cancer, and regenerative medicine.
  • Efficiently identifying genes controlling hematopoietic stem cell (HSC) development is crucial.

Purpose of the Study:

  • To develop and validate a high-throughput screening method for identifying genes essential for definitive hematopoiesis in mice.
  • To uncover novel genetic regulators of hematopoietic stem cell generation and proliferation.

Main Methods:

  • Chemical mutagenesis of mice followed by genetic analysis.
  • High-throughput fluorescence-activated cell sorting (FACS) analysis of blood cell populations in mouse embryos.
  • Analysis of over 1300 mouse embryos at embryonic day 14.5.

Main Results:

  • Successfully recovered 6 mouse strains with defects in definitive hematopoiesis from 45 pedigrees.
  • Demonstrated rapid identification of a novel c-Myb transcription factor mutation causing thrombocythemia and myelofibrosis.
  • Validated the utility of the FACS-based screening approach for discovering essential hematopoiesis genes.

Conclusions:

  • Phenotype-driven, high-throughput screening is an efficient strategy for identifying genes involved in stem cell biology.
  • This approach provides new insights into the genetic networks regulating hematopoietic stem cell development.
  • The findings support the advancement of regenerative medicine and cancer research through a deeper understanding of stem cell regulation.