The effect of flow on vascular endothelial cells grown in tissue culture on polytetrafluoroethylene grafts.
Surgery
; 99(3): 337-43, 1986 Mar.
Article
em En
| MEDLINE
| ID: mdl-3082028
ABSTRACT
Vascular grafts lined with endothelial cells (EC) grown to confluence in culture before implantation may provide a thromboresistant flow surface. Growth of EC on and their adherence to currently available prosthetic materials under conditions of flow are two impediments remaining in the development of such a graft. To address these problems, 22 polytetrafluoroethylene grafts (PTFE) (5 cm by 4 mm inside diameter) were pretreated with collagen and fibronectin, seeded with 2 to 3 X 10(6) bovine aortic EC per graft, and placed in tissue culture (seeded grafts). Twenty-two grafts pretreated with collagen and fibronectin alone served as controls. After 2 weeks morphologic studies revealed that 20/22 seeded grafts were lined with a confluent endothelial layer. Indium 111-oxine was then used to label the EC-seeded grafts. After exposure to either low (25 ml/min) or high (200 ml/min) flow rates for 60 minutes in an in vitro circuit, examination of the luminal surface of the graft by light microscopy and scanning electron microscopy revealed minimal loss of EC. These findings were corroborated by radionuclide scans that showed an insignificant loss of the EC-associated indium label during exposure to flow (7% low flow, 11% high flow). Pretreatment of PTFE grafts with collagen and fibronectin thus promotes both attachment and adherence of EC even under flow conditions.
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Bases de dados:
MEDLINE
Assunto principal:
Compostos Organometálicos
/
Aorta
/
Politetrafluoretileno
/
Prótese Vascular
Limite:
Animals
Idioma:
En
Revista:
Surgery
Ano de publicação:
1986
Tipo de documento:
Article