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Hematopoiesis

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...

Overview of Hematopoiesis

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...

Bone Cells and Tissue

Bone Cells and Tissue

Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the periosteum and...

Multipotency of Hematopoietic Stem Cells

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...

Production of Formed Elements

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...

Regulation of Hematopoietic Stem Cells

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...

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Related Experiment Video

Updated: May 8, 2026

Differentiation of Functional Osteoclasts from Human Peripheral Blood CD14+ Monocytes

Differentiation of Functional Osteoclasts from Human Peripheral Blood CD14⁺ Monocytes

Published on: January 27, 2023

Osteoclasts and hematopoiesis.

¹Department of Experimental Medicine, University of L'Aquila , L'Aquila, Italy .

Bonekey Reports

|August 17, 2013

Summary

This summary is machine-generated.

Osteoclasts, cells involved in bone resorption, may also regulate blood cell formation (hematopoiesis). Further research is needed to clarify their role in bone marrow health and blood disorders.

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Differentiation of Functional Osteoclasts from Human Peripheral Blood CD14+ Monocytes

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Osteoclast Derivation from Mouse Bone Marrow

Osteoclast Derivation from Mouse Bone Marrow

Published on: November 6, 2014

Area of Science:

Bone Biology
Hematology
Stem Cell Research

Background:

The bone marrow cavity houses hematopoietic stem cells (HSCs), crucial for blood cell production.
Osteoblasts are known to maintain the HSC niche, but osteoclasts' role in hematopoiesis is emerging and debated.
Existing data on osteoclast involvement in hematopoiesis are incomplete and sometimes contradictory.

Purpose of the Study:

To review the literature on the relationship between bone resorption and HSC regulation.
To discuss the influence of bone diseases and treatments on hematopoiesis.
To explore the role of osteoclasts in HSC homeostasis and clinical implications.

Main Methods:

Literature review and synthesis of existing research.
Discussion of genetic studies and preclinical experiments.
Analysis of the impact of bone disorders and bone-restoring treatments on hematopoiesis.

Main Results:

A close relationship exists between bone resorption and HSC behavior (permanence in bone or circulation).
Bone diseases can impact hematological alterations, and calcium/osteoclast enzymes may regulate HSCs.
Bone disorders and treatments targeting bone mass affect hematopoiesis, with significant clinical relevance.

Conclusions:

Osteoclasts are increasingly recognized for their role in regulating hematopoiesis.
Further investigation is essential to confirm osteoclast functions in myelopoiesis and lymphopoiesis.
Understanding this interplay may lead to novel treatments for hematological failures and bone diseases.