A NEW AND SIMPLE TECHNIQUE TO ACHIEVE A CONFLUENT AND FLOW RESISTANT ENDOTHELIUM ON VASCULAR EPTFE-GRAFTS USING HUMAN SERUM

被引:11
作者
BENGTSSON, L
RADEGRAN, K
HAEGERSTRAND, A
机构
[1] Department of Thoracic Surgery, Karolinska Hospital, Stockholm
[2] Department of Anatomy, Karolinska Institutet, Stockholm
来源
EUROPEAN JOURNAL OF VASCULAR SURGERY | 1994年 / 8卷 / 02期
关键词
ENDOTHELIUM; TISSUE CULTURE; FIBRONECTIN; BLOOD VESSEL PROSTHESIS; ARTIFICIAL ORGAN;
D O I
10.1016/S0950-821X(05)80457-8
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Confluent endothelialisation of vascular grafts in vitro before implantation has been suggested as a way to improve patency. With the aim of creating a confluent endothelium or expanded polytetrafluoroethylene (ePTFE) vascular grafts, using a minimum of allo- or xenogenic material, we have investigated the use of human serum for endothelial cell (EC) growth and adhesion to the grafts. Loss of fibronectin from the serum was measured before and after coating. After serum- or collagen Iprecoating, the grafts were seeded with cultured adult human endothelial cells from the great saphenous vein and then kept under rotational culture conditions for 2 days. To evaluate the endothelial resistance to detachment the grafts were mounted in parallel to a heart-lung machine, delivering a pulsatile flow of human blood for 1 hour. Evaluation was performed using scanning electron microscopy (SEM). By simply pressing serum through the graft wall, fibronectin corresponding to 19 μg/cm graft surface was consumed. It was possible to achieve a confluent endothelium on both serum- and collagen I-precoated grafts (n = 8). After being subjected to blood flow, SEM revealed a complete endothelial lining of the grafts (n = 12) except for two serum-precoated grafts which showed ≤10% and between 10 and 20% denuded areas, and one collagen-coated graft that showed ≤10% of denuded area. This method provides a way to achieve a confluent and flow resistant endothelial lining on ePTFE vascular grafts. © 1994 W. B. Saunders Company Ltd.
引用
收藏
页码:182 / 187
页数:6
相关论文
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