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Related Concept Videos

Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

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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...
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Multipotency of Hematopoietic Stem Cells01:19

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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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Hematopoietic Stem Cell Identification Postirradiation.

Andrea M Patterson1, Christie M Orschell2, Louis M Pelus3

  • 1Department of Medicine/Hematology Oncology, Indiana University School of Medicine, Indianapolis, IN, USA. anmapatt@iu.edu.

Methods in Molecular Biology (Clifton, N.J.)
|October 18, 2022
PubMed
Summary
This summary is machine-generated.

Radiation damages hematopoietic stem cells (HSCs), complicating their analysis post-irradiation. New techniques are needed to identify and study HSCs in mouse bone marrow after radiation exposure.

Keywords:
AutofluorescenceBone marrowFGD5Flow cytometryHematopoiesisIrradiationPelvic bonesSLAMSpinec-Kit

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Area of Science:

  • Hematology
  • Radiation Biology
  • Stem Cell Biology

Background:

  • Radiation exposure causes significant damage to the hematopoietic system, leading to pancytopenia and bone marrow failure.
  • Analyzing bone marrow cells after irradiation is crucial for understanding damage and developing treatments.
  • Conventional flow cytometry methods for identifying hematopoietic stem cells (HSCs) are challenged by radiation-induced loss of key markers like c-Kit.

Purpose of the Study:

  • To outline techniques for the identification and analysis of hematopoietic stem cells (HSCs) in mouse bone marrow following radiation exposure.
  • To address the complications in HSC analysis caused by radiation-induced marker loss.

Main Methods:

  • Review and description of established and modified flow cytometry techniques.
  • Focus on alternative markers and gating strategies for HSC identification post-irradiation.
  • Methodologies for analyzing primitive hematopoietic populations in irradiated mouse bone marrow.

Main Results:

  • Established flow cytometry protocols are insufficient for accurate HSC identification in irradiated samples.
  • Radiation exposure leads to a significant decrease in c-Kit expression on HSCs.
  • Alternative markers and adjusted gating strategies enable reliable HSC identification post-irradiation.

Conclusions:

  • Accurate identification of hematopoietic stem cells (HSCs) after radiation exposure requires adapted analytical techniques.
  • Overcoming the challenge of c-Kit loss is essential for studying radiation effects on HSCs and developing radioprotective or regenerative therapies.
  • These techniques are vital for advancing research in radiation biology and bone marrow transplantation.