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Related Concept Videos

Mesenchymal Stem Cells01:19

Mesenchymal Stem Cells

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 access...

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Related Experiment Video

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Isolation of Human BAMBIhighMFGE8high Umbilical Cord-Derived Mesenchymal Stromal Cells
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Cell surface engineering of mesenchymal stem cells.

Debanjan Sarkar1, Weian Zhao, Ashish Gupta

  • 1Department of Medicine, Center for Regenerative Therapeutics Brigham and Women’s Hospital, Harvard Medical School, Harvard Stem Cell Institute, Cambridge, MA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|March 25, 2011
PubMed
Summary
This summary is machine-generated.

This study developed a novel method to enhance stem cell homing for regenerative medicine. By chemically attaching targeting ligands to mesenchymal stem cells (MSCs), researchers improved their ability to reach specific tissues, overcoming a key barrier in cell therapy.

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Area of Science:

  • Biotechnology
  • Regenerative Medicine
  • Cell Therapy

Background:

  • Stem cell therapies hold promise for treating diseases and tissue defects.
  • A major challenge is efficiently targeting viable cells to specific tissues, especially with systemic infusion.
  • Mesenchymal stem cells (MSCs) often have poor homing capabilities, limiting their therapeutic effectiveness.

Purpose of the Study:

  • To develop a platform technology for enhancing the homing efficiency of stem cells.
  • To chemically attach cell adhesion molecules to the cell surface for improved tissue targeting.
  • To investigate the potential of modified MSCs for targeting P-selectin expressing endothelium.

Main Methods:

  • Cells were treated to introduce biotin groups on their surface.
  • Streptavidin was added to bind biotin, providing unoccupied binding sites.
  • Biotinylated targeting ligands, specifically sialyl Lewisx (SLeX), were attached to MSCs.
  • In vitro flow chamber assays were used to assess cell rolling behavior on P-selectin coated substrates.

Main Results:

  • Engineered MSCs (SLeX-MSCs) demonstrated rolling behavior on P-selectin under shear stress.
  • This indicates potential targeting of P-selectin expressing endothelium in bone marrow and inflammation sites.
  • Surface modification did not adversely affect MSCs' viability, proliferation, differentiation, or adhesion kinetics.

Conclusions:

  • The developed chemical approach effectively enhances stem cell homing capabilities.
  • This technology has broad implications for systemic cell therapies requiring targeted delivery.
  • The method is adaptable for various cell types and targeting ligands, potentially improving cell-cell interactions.