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Related Concept Videos

Overview of Hematopoiesis01:20

Overview of Hematopoiesis

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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...
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Hematopoiesis01:21

Hematopoiesis

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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...
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Production of Formed Elements01:34

Production of Formed Elements

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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.
Most HSCs commit to...
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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

Multipotency of Hematopoietic Stem Cells

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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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Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

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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.
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Hematopoiesis and Mast Cell Development.

Domenico Ribatti1, Antonio d'Amati1

  • 1Department of Translational Biomedicine and Neuroscience, School of Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy.

International Journal of Molecular Sciences
|July 14, 2023
PubMed
Summary
This summary is machine-generated.

Hematopoietic stem cells (HSCs) generate all blood cells. This review details how HSCs in bone marrow give rise to mast cells, tracing their origins from embryonic development to adult life.

Keywords:
bone marrowhematopoiesislivermast cellyolk sac

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Area of Science:

  • Hematology
  • Immunology
  • Developmental Biology

Background:

  • Hematopoietic stem cells (HSCs) are crucial for lifelong blood cell production.
  • HSCs reside in the bone marrow, supporting a complex niche for hematopoiesis.
  • Mast cells, innate immune cells, have intricate developmental origins.

Purpose of the Study:

  • To review the ontogeny and sources of mast cells.
  • To elucidate the mechanisms linking hematopoietic processes to mast cell development.
  • To highlight the multifaceted origins of mast cells from embryonic to adult stages.

Main Methods:

  • Literature review of studies on hematopoietic stem cells and mast cell development.
  • Analysis of ontogenic relationships between HSCs and immune cell precursors.
  • Synthesis of current knowledge on mast cell differentiation pathways.

Main Results:

  • Mast cells originate from the yolk sac in early embryonic development.
  • Embryonic mast cell populations are replaced by definitive HSC-derived progenitors.
  • Adult mast cells develop in the bone marrow from HSCs via multiple progenitor stages.

Conclusions:

  • Mast cell development is a complex process with distinct embryonic and adult phases.
  • Understanding mast cell origins is key to comprehending innate immune cell development.
  • This review consolidates knowledge on the hematopoietic origins of mast cells.