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Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...
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Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

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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...
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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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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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Related Experiment Video

Updated: Apr 12, 2026

Real-Time Imaging of CCL5-Induced Migration of Periosteal Skeletal Stem Cells in Mice
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Real-Time Imaging of CCL5-Induced Migration of Periosteal Skeletal Stem Cells in Mice

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Interactions between MSCs and immune cells: implications for bone healing.

Tracy K Kovach1, Abhijit S Dighe2, Peter I Lobo3

  • 1School of Medicine, University of Virginia, Charlottesville, VA 22908, USA.

Journal of Immunology Research
|May 23, 2015
PubMed
Summary
This summary is machine-generated.

Delayed fracture healing affects millions annually. Mesenchymal stromal cells (MSCs) show promise in enhancing bone repair by modulating the immune response, offering new therapeutic targets for improved fracture healing.

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Assessment of the Immunomodulatory Properties of Human Mesenchymal Stem Cells MSCs
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Area of Science:

  • Orthopedics
  • Immunology
  • Regenerative Medicine

Background:

  • Fracture healing involves an inflammatory response, but prolonged inflammation inhibits repair.
  • Immune cells and cytokines play complex roles, with some promoting and others hindering bone healing.
  • Delayed or impaired fracture healing affects 5-20% of millions of annual fractures in the US.

Purpose of the Study:

  • To review the literature on the immune system's role in fracture repair.
  • To examine the use of mesenchymal stromal cells (MSCs) in enhancing fracture healing.
  • To explore the interactions between MSCs and immune cells in the context of bone repair.

Main Methods:

  • Review of in vitro and in vivo studies.
  • Analysis of immune cell involvement in fracture healing.
  • Examination of mesenchymal stromal cell (MSC) functions and interactions.

Main Results:

  • Mesenchymal stromal cells (MSCs) can differentiate into bone and modulate immune cells.
  • Understanding immune cell and cytokine dynamics is crucial for fracture repair.
  • MSCs offer potential for augmenting natural bone healing processes.

Conclusions:

  • Modulating immune responses and MSC interactions can enhance fracture healing.
  • Further research into cellular and noncellular targets can improve therapeutic interventions.
  • Mesenchymal stromal cell (MSC)-based therapies present a promising avenue for treating delayed fracture healing.