Role of adhesion molecules in leukocyte binding to endothelial cells adherent to vascular grafts.
BACKGROUND
The localization of leukocytes to vascular grafts is an essential part of healing and infection resistance. The mechanisms involved in this process are only partly understood.


METHODS
Human saphenous vein endothelial cells (HSVEC) were grown on control polystyrene culture ware and expanded polytetrafluoroethylene (ePTFE). The binding of monoclonal antibodies against the intercellular adhesion molecule (ICAM-1) and the E-selectin by adherent HSVEC was determined by flow cytometry. Peripheral blood leukocytes (PBL) were cocultured with HSVEC adherent to ePTFE and leukocyte binding was determined with and without the addition of a protein kinase C inhibitor.


RESULTS
HSVEC adherent to ePTFE constitutively bound anti-ICAM-1 antibodies, which were attenuated by the protein kinase C inhibitor, H-7. HSVEC adherent to ePTFE bound significantly greater numbers of leukocytes than those on control (58 versus 41 percent, p < 0.05). Incubation with H-7 decreased leukocyte binding to HSVEC significantly (p < 0.005). Coculture of PBL with HSVEC adherent to ePTFE caused a tenfold increase in binding of anti-E-selectin antibodies (p < 0.0005).


CONCLUSIONS
These data indicate that PBL binding to HSVEC adherent to ePTFE is, at least in part, ICAM-1 to HSVEC adherent to ePTFE is, at least in part, ICAM-1 and E-selection dependent.
Margiotta
M
M
Department of Surgery, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Brunswick 08903-0019.
Benton
L
L
Robertson
F
F
Greco
R S
RS
D001807:Blood Vessel Prosthesis; D002448:Cell Adhesion / Q000502:physiology*; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D002478:Cells, Cultured; D019040:E-Selectin; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism*; D005434:Flow Cytometry; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism*; D007962:Leukocytes / Q000378:metabolism*; D011138:Polytetrafluoroethylene; D012501:Saphenous Vein
D015815:Cell Adhesion Molecules; D019040:E-Selectin; D018799:Intercellular Adhesion Molecule-1; D011138:Polytetrafluoroethylene