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Selectins

Selectins

Cell adhesion is an essential aspect of multicellularity. While stable cell interactions usually occur between cells of the same type, transient cell interactions occur between cells of different tissue types, such as between neutrophils and endothelial cells. Selectins are one class of cell adhesion molecules (CAMs) that bind carbohydrate ligands to form transient cell adhesion. They are rod-like proteins with a long extracellular part of variable length ending with the lectin domain, which...

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Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion

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Selective endothelial cell attachment to peptide-modified terpolymers.

Anka N Veleva¹, Daniel E Heath², Stuart L Cooper²

¹Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA.

|June 17, 2008

Summary

Researchers developed specific peptides to guide endothelial cell behavior for cardiovascular applications. These peptides, when attached to biomaterials, selectively bind to progenitor endothelial cells, paving the way for new cell therapies.

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Area of Science:

Biomaterials Science
Cell Biology
Cardiovascular Research

Background:

Previous work identified specific peptide ligands for human blood outgrowth endothelial cells (HBOEC).
Endothelial cells (EC) play a crucial role in cardiovascular health and disease.
Developing targeted biomaterials for EC is essential for cardiovascular applications.

Purpose of the Study:

To utilize HBOEC-specific peptides to direct and modulate endothelial cell behavior.
To design functional biomaterials for cardiovascular applications using these peptides.
To demonstrate the specificity of peptide-modified biomaterials for HBOEC.

Main Methods:

Phage display was used to select HBOEC-specific peptides.
Peptide ligands were tested for their impact on EC function (proliferation, migration, tube formation, VEGF response).
HBOEC-specific peptides were incorporated into methacrylic terpolymers via free radical polymerization.

Main Results:

The selected peptide (TPSLEQRTVYAK) retained binding affinity to HBOEC when covalently coupled to a terpolymer matrix.
The peptide-modified terpolymer demonstrated specific binding to HBOEC, with limited attachment of human umbilical vein endothelial cells (HUVEC).
This study is the first to show specific binding of peptide-modified biomaterials to both mature EC (HUVEC) and progenitor EC (HBOEC).

Conclusions:

HBOEC-specific peptides can be successfully incorporated into biomaterials.
Peptide-modified biomaterials exhibit specific binding to HBOEC, differentiating them from mature EC.
These findings support the development of autologous cell therapies for cardiovascular disease treatment.