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Regular Article| Volume 67, ISSUE 2, P132-136, February 01, 1997

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Rapid Postincubation Endothelial Retention by Dacron Grafts

DOI:https://doi.org/10.1006/jsre.1996.4984
Rapid Postincubation Endothelial Retention by Dacron Grafts
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      Abstract

      Defining the most appropriate conditions for strengthening the retention of endothelial cells (ECs) by small-diameter prosthetic endothelialized grafts is indispensable to their clinical application. The incubation time after seeding is one of the most important factors in EC retention. The effects of different postincubation times (0, 2, 4, 8, 16, 24, and 36 hr) on EC monolayers on two different types of graft, fibronectin-coated expanded polytetrafluoroethylene (ePTFE) and collagen-coated knitted Dacron grafts (4 mm × 5 cm) were examined.In situcounting of ECs on the grafts was performed by light microscopy. The percentage cell retention was calculated by dividing the cell counts for grafts exposed to pulsatile flow for 90 min by those for control grafts. To characterize the EC coverage of the grafts, scanning electron microscopy was also performed. The average cell density of control grafts ranged from 5.59 ± 1.1 to 6.69 ± 1.5 × 104cells/cm2and did not differ according to the kind of graft or incubation time. The knitted Dacron grafts showed the maximal cell retention (88 ± 5%) after incubation for 8 hr, whereas ePTFE grafts did so after 24 hr (83 ± 6%). Scanning electron microscopic examination after incubation for 8 hr revealed that the density of human ECs on the surfaces of ePTFE and Dacron grafts differed, although there was no morphological difference between the ECs on the two types of graft. Knitted Dacron grafts achieved a high percentage retention in a shorter time than ePTFE grafts.
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      Article info

      Footnotes

      ☆This study was supported partially by a grant-in-aid for scientific research from the Ministry of Education, Science and Culture of Japan (06454361).

      ☆☆P. ZillaM. Deutch, Eds.

      Identification

      DOI: https://doi.org/10.1006/jsre.1996.4984

      Copyright

      © 1997 Academic Press. Published by Elsevier Inc. All rights reserved.

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