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Human vascular endothelial cells on expanded PTFE precoated with an engineered protein adhesion factor
J P Mazzucotelli1, M Moczar, L Zede
1Centre de Recherches Chirurgicales Henri Mondor, Faculté de Médecine, Creteil, France.
The International Journal of Artificial Organs
|February 1, 1994
Summary
Engineered fibronectin-like polymers promote short-term endothelial cell adhesion to synthetic vascular grafts. However, these materials do not support long-term cell survival or proliferation, limiting their clinical application.
Area of Science:
- Biomaterials Science
- Vascular Tissue Engineering
- Cell Adhesion
Background:
- Endothelialization of synthetic vascular prostheses is crucial for preventing thrombosis.
- Adhesive proteins play a key role in cell attachment and survival on biomaterials.
- Understanding molecular structure-function relationships is vital for designing effective vascular grafts.
Purpose of the Study:
- To evaluate an engineered fibronectin-like adhesion factor (FP) containing Arg-Gly-Asp (RGD) repeats.
- To assess the efficacy of FP as an adhesive substrate for human saphenous vein endothelial cells on ePTFE.
- To investigate the role of FP's molecular structure in endothelialization in vitro.
Main Methods:
- Coating expanded polytetrafluoroethylene (ePTFE) samples with varying concentrations of FP.
- Seeding human saphenous vein endothelial cells at low and high densities.
- Culturing cells on FP-coated and fibronectin-coated ePTFE for up to 7 days.
- Quantifying cell adhesion, proliferation, and survival.
Main Results:
- FP coating reached maximum cell adhesion at 20 micrograms/cm2.
- Higher cell adhesion was observed on FP-coated ePTFE compared to fibronectin-coated PTFE at high seeding densities.
- Approximately 55% of adhered cells survived for 7 days on FP, while fibronectin showed predominantly cell debris.
Conclusions:
- The engineered RGD polymer (FP) effectively promotes short-term adhesion of vascular endothelial cells to ePTFE.
- FP did not ensure long-term cell proliferation and survival in this in vitro model.
- Further modifications are needed to enhance the long-term performance of engineered adhesion factors for vascular prostheses.