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Related Concept Videos

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...
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...
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...
Production of Formed Elements01:34

Production of Formed Elements

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.
Most HSCs commit to...
Overview of Hematopoiesis01:20

Overview of Hematopoiesis

Hematopoiesis, or blood cell production, is a vital biological process that begins early in embryonic development and continues throughout life. This process generates the various types of cells found in blood, including red blood cells, white blood cells, and platelets from hematopoietic stem cells (HSCs).
Developmental Phases of Hematopoiesis
Initially, HSCs are formed in the embryonic yolk sac, a critical site for early blood cell production. These stem cells subsequently migrate to other...
Source And Potency Of Stem Cells01:27

Source And Potency Of Stem Cells

Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...

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Updated: Jul 11, 2026

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
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Published on: July 8, 2012

Hematopoietic stem cells: generation and self-renewal.

X Huang1, S Cho, G J Spangrude

  • 1Departments of Pathology and Medicine, University of Utah, Salt Lake City, UT 84132-2408, USA.

Cell Death and Differentiation
|September 8, 2007
PubMed
Summary

Hematopoietic stem cells (HSCs) are crucial for therapies. Research explores HSC generation in embryos and maintenance in bone marrow niches, highlighting ongoing questions about their origins and regulation.

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Last Updated: Jul 11, 2026

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors
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Identification of Key Factors Regulating Self-renewal and Differentiation in EML Hematopoietic Precursor Cells by RNA-sequencing Analysis

Published on: November 11, 2014

Area of Science:

  • Stem cell biology
  • Developmental biology
  • Hematopoiesis

Background:

  • Adult stem cells, particularly hematopoietic stem cells (HSCs), are key to regenerative medicine.
  • HSCs serve as a model for understanding stem cell behavior in other organs.
  • Knowledge of HSC generation and maintenance is advancing rapidly.

Purpose of the Study:

  • To review current understanding of HSC generation during embryonic development.
  • To examine HSC maintenance within bone marrow niches in adult life.
  • To identify knowledge gaps in HSC stemness and niche regulation.

Main Methods:

  • Literature review of embryonic HSC development.
  • Analysis of bone marrow niche interactions.
  • Examination of signaling pathways regulating HSC fate.

Main Results:

  • HSC development involves multiple embryonic sites, with contributions debated.
  • Bone marrow niches regulate HSC self-renewal and differentiation via signaling pathways.
  • Integration of extracellular and intracellular signals governs HSC fate.

Conclusions:

  • Significant progress has been made in understanding HSC biology.
  • The precise mechanisms defining stem cell niches and HSC 'stemness' require further investigation.
  • Many questions remain unanswered in this well-defined stem cell model.