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Related Concept Videos

Bone Cells and Tissue01:30

Bone Cells and Tissue

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Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the...
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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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Distinctive Features of Adult Stem Cells vs Cancer Stem Cells01:18

Distinctive Features of Adult Stem Cells vs Cancer Stem Cells

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A stem cell is an unspecialized cell that can divide without limit as needed and can, under specific conditions, differentiate into specialized cells.
Adult stem cells
Adult stem cells are tissue-specific; hence, they divide to develop the tissue from which they originate. One type of adult stem cell is the epithelial stem cell, which gives rise to the keratinocytes in the multiple layers of epithelial cells in the epidermis of the skin. Adult bone marrow has three distinct types of stem cells:...
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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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Bone Structure01:55

Bone Structure

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Related Experiment Video

Updated: Oct 13, 2025

Use of Human Perivascular Stem Cells for Bone Regeneration
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Use of Human Perivascular Stem Cells for Bone Regeneration

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Cell Surface and Functional Features of Cortical Bone Stem Cells.

Norihiko Sasaki1, Yoko Itakura1, Sadia Mohsin2

  • 1Research Team for Geriatric Medicine (Vascular Medicine), Tokyo Metropolitan Institute of Gerontology, Tokyo 173-0015, Japan.

International Journal of Molecular Sciences
|November 13, 2021
PubMed
Summary

Mouse cortical-bone-derived stem cells (mCBSCs) show enhanced self-renewal and unique glycan profiles compared to mouse mesenchymal stem cells (mMSCs). These mCBSCs secrete more TGF-β1, suggesting potential for cardiac and noncardiac tissue repair.

Keywords:
TGF-β1cortical bone stem cellsglycan profilestemness

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Area of Science:

  • Stem Cell Biology
  • Biochemistry
  • Regenerative Medicine

Background:

  • Mouse cortical-bone-derived stem cells (mCBSCs) are a novel cell type with potential therapeutic applications.
  • Previous studies suggest mCBSC treatment improves cardiac function after myocardial infarction.
  • Comparison with established mouse mesenchymal stem cells (mMSCs) is crucial for understanding mCBSC characteristics.

Purpose of the Study:

  • To comprehensively compare the stemness features, cell surface glycan profiles, and paracrine functions of mCBSCs and mMSCs.
  • To elucidate the unique properties of mCBSCs that may underlie their therapeutic potential.
  • To investigate the role of secreted factors, such as TGF-β1, in mCBSC behavior.

Main Methods:

  • Stemness assays to evaluate self-renewal and differentiation capacities.
  • Lectin array analysis to profile cell surface glycans.
  • Quantification of secreted factors, including TGF-β1.
  • Functional assays to assess cell migration and fibroblast activation.

Main Results:

  • mCBSCs exhibit greater self-renewing capacity than mMSCs but limited chondrogenic differentiation.
  • mCBSCs display distinct cell surface glycan profiles, with lower α2-6sialic acid and higher lactosamine, poly lactosamine/poly N-acetylglucosamine, and α2-3sialic acid expression.
  • mCBSCs secrete significantly more TGF-β1 than mMSCs, which promotes mCBSC migration and fibroblast activation.

Conclusions:

  • mCBSCs possess unique stemness properties and cell surface glycan signatures distinct from mMSCs.
  • The elevated TGF-β1 secretion by mCBSCs plays a role in their migratory behavior and interaction with the microenvironment.
  • These distinct characteristics suggest that mCBSCs hold promise for advanced applications in cardiac and noncardiac tissue repair.