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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...

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...

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...

Stem Cell Therapy for Tissue Regeneration

Stem Cell Therapy for Tissue Regeneration

Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...

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,...

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Related Experiment Video

Updated: Jun 30, 2026

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells

Published on: May 19, 2023

Hematopoietic stem cells and the aging hematopoietic system.

Roi Gazit¹, Irving L Weissman, Derrick J Rossi

¹Immune Disease Institute, Harvard Stem Cell Institute, and Department of Pathology, Harvard Medical School, Boston, MA.

Seminars in Hematology

|September 24, 2008

Summary

Aging hematopoietic stem cells (HSCs) lose homeostatic control, leading to anemia, immune decline, and myelogenous diseases. This review explores mechanisms behind HSC aging and its impact on the hematopoietic system.

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Last Updated: Jun 30, 2026

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells

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Published on: May 19, 2023

Stromal Cell Isolation From Hematopoietic Organs

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Published on: January 26, 2024

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Published on: July 8, 2012

Area of Science:

Hematology
Gerontology
Stem Cell Biology

Background:

Age-associated hematopoietic system changes include anemia, immune dysfunction, and myelogenous diseases.
These changes are linked to a loss of homeostatic control.
Stem and progenitor cells are key to maintaining adult tissue homeostasis.

Purpose of the Study:

To review evidence linking stem cell alterations to hematopoietic system aging.
To focus on proposed mechanisms contributing to stem cell aging.

Main Methods:

Literature review of studies on hematopoietic stem cell aging.
Analysis of proposed mechanisms underlying stem cell functional decline with age.

Main Results:

Evidence suggests alterations in hematopoietic stem cell (HSC) prevalence and function contribute to aging.
Specific mechanisms driving HSC aging are explored.

Conclusions:

Hematopoietic stem cell aging is a significant factor in age-related hematopoietic dysfunction.
Understanding these mechanisms is crucial for addressing age-related blood disorders.