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Related Concept Videos

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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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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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.
Thrombopoietin (TPO), mainly released by the liver,...
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The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Stem Cell Niche01:26

Stem Cell Niche

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The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
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Updated: Nov 3, 2025

Isolation Method for Long-Term and Short-Term Hematopoietic Stem Cells
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Extracellular Vesicles and Hematopoietic Stem Cell Aging.

Laura R Goldberg1

  • 1STRM.BIO, Cambridge MA.

Arteriosclerosis, Thrombosis, and Vascular Biology
|June 3, 2021
PubMed
Summary
This summary is machine-generated.

Extracellular vesicles (EVs) are key mediators in hematopoietic stem cell (HSC) aging. This review explores how EVs influence HSC function during aging and their potential for rejuvenation strategies.

Keywords:
agingextracellular vesicleshematopoiesishematopoietic stem cellstem cell

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Area of Science:

  • Cell Biology
  • Hematology
  • Gerontology

Background:

  • Extracellular vesicles (EVs) mediate intercellular communication and influence hematopoiesis.
  • Aging affects hematopoietic stem cells (HSCs), and EVs are implicated in age-related diseases.
  • EVs' role in HSC aging is an emerging area of research.

Purpose of the Study:

  • To review the effects of aging on HSCs.
  • To examine the role of EVs in general aging processes.
  • To detail EV modulation of hematopoiesis and its implications for HSC aging.

Main Methods:

  • Literature review focusing on EV modulation of normal and malignant hematopoiesis.
  • Analysis of studies on EV influence on HSC aging.
  • Synthesis of emerging evidence on EV-mediated HSC rejuvenation.

Main Results:

  • EVs play a critical role in modulating hematopoiesis within the bone marrow.
  • Evidence suggests EVs are key mediators of HSC aging.
  • Emerging literature shows EVs modulate HSC phenotypes during aging and offer rejuvenation potential.

Conclusions:

  • Understanding EV-HSC interactions is crucial for addressing age-related hematologic dysfunction.
  • Defining age-dependent EV effects on HSCs can lead to innovative therapeutic strategies.
  • Targeting EVs may offer novel approaches to delay or reverse aging-related hematologic decline.