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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...

Differentiation of Common Myeloid Progenitor Cells

Differentiation of Common Myeloid Progenitor Cells

Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...

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...

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...

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Related Experiment Video

Updated: Jul 9, 2026

A Novel Three-dimensional Flow Chamber Device to Study Chemokine-directed Extravasation of Cells Circulating under Physiological Flow Conditions

A Novel Three-dimensional Flow Chamber Device to Study Chemokine-directed Extravasation of Cells Circulating under Physiological Flow Conditions

Published on: July 15, 2013

Chemokines in hematopoiesis.

Hal E Broxmeyer¹

¹Department of Microbiology and Immunology, and Walther Oncology Center, Indiana University School of Medicine, 950 West Walnut Street, Indianapolis, IN 46202, USA. hbroxmey@iupui.edu

Current Opinion in Hematology

|November 29, 2007

Summary

Chemokines regulate hematopoietic stem cell transplantation. The SDF-1/CXCL12-CXCR4 axis is key, with agents like AMD3100 showing promise in clinical applications for stem cell mobilization and engraftment.

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A Novel Three-dimensional Flow Chamber Device to Study Chemokine-directed Extravasation of Cells Circulating under Physiological Flow Conditions

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Published on: July 15, 2013

Homing of Hematopoietic Cells to the Bone Marrow

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Bioengineering of Humanized Bone Marrow Microenvironments in Mouse and Their Visualization by Live Imaging

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Published on: August 1, 2017

Area of Science:

Hematology
Immunology
Cell Biology

Background:

Hematopoiesis regulation is crucial for stem cell transplantation success.
Chemokines and their receptors significantly influence hematopoietic stem and progenitor cell (HSPC) functions.
The SDF-1/CXCL12-CXCR4 axis is a primary focus in HSPC migration and survival.

Purpose of the Study:

To review recent advancements in understanding chemokine and chemokine receptor roles in hematopoiesis.
To highlight the significance of the SDF-1/CXCL12-CXCR4 axis in regulating HSPC behavior.
To discuss therapeutic strategies targeting chemokine pathways for improved stem cell transplantation.

Main Methods:

Literature review of studies from 2006 to the present.
Analysis of research on SDF-1/CXCL12 and CXCR4 activity and production.
Examination of findings related to other chemokines and their receptors.

Main Results:

Extensive research details SDF-1/CXCL12 activity, including intracellular signaling in various cell types like HSPCs, lymphocytes, and tumor cells.
Studies have elucidated the production mechanisms of SDF-1/CXCL12 and CXCR4.
The actions and production of other chemokines have also been investigated.

Conclusions:

Chemokine-chemokine receptor interactions are vital for hematopoiesis and immune cell function.
Recent findings clarify the regulatory roles of chemokines and receptors in hematopoiesis.
Therapeutic agents targeting chemokines, such as CD26 inhibitors and AMD3100, are being developed for enhanced HSPC homing, engraftment, and mobilization in transplantation.