4.2 Article

Fibroblast and Vascular Endothelial Growth Factor Coating of Decellularized Vascular Grafts Stimulates Undesired Giant Cells and Graft Encapsulation in a Rat Model

Journal

ARTIFICIAL ORGANS
Volume 35, Issue 1, Pages E1-E10

Publisher

WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1525-1594.2010.01072.x

Keywords

Fibroblast growth factor; Vascular endothelial growth factor; Vascular grafts; Giant cells; Encapsulation

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Replacing an infected prosthesis with a bioimplant provides a hopeful alternative in septic vascular surgery. The objective of this study was to determine the effect of fibroblast endothelial growth factors (FGF) and vascular endothelial growth factors (VEGF) coating on a decellularized vascular graft in a rat model and the possible impact on recellularization processes. Rat aortas were decellularized, crosslinked with genipin, and coated with poly-(D, L) lactide containing either FGF or VEGF. Observation periods were 6 and 12 weeks. Surprisingly, we found moderate accumulation of giant cells around the grafts that contained poly-(D, L) lactide acid. FGF and VEGF grafts showed massive stimulation of giant cells and eosinophils leading to complete graft encapsulation (P < 0.05). Pseudointmal hyperplasia was significantly increased in the FGF group (P < 0.05). Both results can only be interpreted as very negative. We achieved a situation in diametric opposition to that which we had hoped for. These data demonstrate that the use of growth factors may produce harmful side effects.

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