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Role of Hematopoietic Growth Factors

Role of Hematopoietic Growth Factors

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.
Thrombopoietin (TPO), mainly released by the liver,...

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...

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...

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...

Lineage Commitment

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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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Related Experiment Video

Updated: Jul 8, 2026

Retroviral Infection of Murine Embryonic Stem Cell Derived Embryoid Body Cells for Analysis of Hematopoietic Differentiation

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Published on: October 20, 2014

Hematopoietic cytokines.

Donald Metcalf¹

¹Walter and Eliza Hall Institute of Medical Research, Victoria, Australia. metcalf@wehi.edu.au

|January 10, 2008

Summary

This summary is machine-generated.

Hematopoietic cytokines control blood cell production. This review details the historical discovery and evolving understanding of key cytokines like erythropoietin and colony-stimulating factors used clinically.

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Area of Science:

Hematology
Cell Biology
Molecular Biology

Background:

Hematopoietic cell production is regulated by cytokines acting through specific receptors.
Cytokines influence cell survival, proliferation, differentiation, maturation, and function.
Some hematopoietic cells require multiple cytokines for proliferation.

Purpose of the Study:

To review established hematopoietic cytokines and their historical development.
To focus on cytokines influencing myeloid and erythroid lineages.
To exclude newer candidate regulators and lymphoid-active cytokines.

Main Methods:

Historical review of cytokine discovery and understanding.
Sequential presentation of discovery, understanding, validation, and puzzlement.
Focus on well-established cytokines influencing hematopoietic cell production.

Main Results:

Three key cytokines (erythropoietin, G-CSF, GM-CSF) are in routine clinical use.
These cytokines have been used in millions of patients for cell production stimulation.
The understanding of these cytokines has evolved significantly over 50 years.

Conclusions:

Established hematopoietic cytokines play crucial roles in regulating blood cell production.
Clinical application of key cytokines has a long history and wide patient impact.
The study provides a historical perspective on the evolving scientific understanding of these vital regulators.