Glycoconjugate mediated endothelial cell adhesion to Dacron polyester film.
OBJECTIVE
The purpose of this study was to explore new strategies for enhancing specific cell type attachment to biomaterials using immobilized lectins for cell surface glycoconjugates. The lectin Ulex europaeus I (UEA I) has a high affinity for human vascular endothelial cell surface glycoconjugates.


METHODS
UEA I was covalently bound to polyethylene terephthalate (Dacron) with the cross-linking agent 1-ethyl-3-(dimethylaminopropyl)carbodiimide hydrochloride to achieve oligosaccharide-mediated endothelial cell attachment to this otherwise nonadherent surface.


RESULTS
Experiments with radiolabeled UEA I demonstrated covalent linkage of as much as 1.35 micrograms/cm2. The lectin binding site is available after the reaction, as demonstrated in experiments a neoglycoprotein. Adhesion studies reveal a 100-fold increase in endothelial cell attachment for the UEA I/polyethylene terephthalate surface (99.7 +/- 29.6 cells/high-power field) when compared with untreated (0.7 +/- 0.5), crosslinking agent (0.4 +/- 0.3), and denatured UEA I (1.2 +/- 1.1) control groups. Five vascular endothelial cell lines adhered to the UEA I/polyethylene terephthalate surface, whereas monocytes, smooth muscle cells, and fibroblasts did not.


CONCLUSIONS
These results imply new strategies for endothelialization of prosthetic grafts and promotion of selective cell adherence to biomaterials, with emphasis on carbohydrate interactions. Moreover, this experimental system offers a model for exploring the biologic significance of the endothelial cell-UEA I ligand.
New England Deaconess Hospital/Harvard Medical School, Boston, MA 02215.
C K
CK
Ozaki
M D
MD
Phaneuf
S L
SL
Hong
W C
WC
Quist
F W
FW
LoGerfo
D002448:Cell Adhesion / Q000187:drug effects; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology* / Q000187:drug effects / Q000502:physiology*; D006001:Glycoconjugates / Q000502:physiology*; D006801:Humans; D037102:Lectins / Q000494:pharmacology*; D037121:Plant Lectins; D011093:Polyethylene Terephthalates
D006001:Glycoconjugates; D037102:Lectins; D037121:Plant Lectins; D011093:Polyethylene Terephthalates; C036850:Ulex europaeus lectins