The use of mild trypsinization conditions in the detachment of endothelial cells to promote subsequent endothelialization on synthetic surfaces.

Journal Article (Journal Article)

A necessary condition for endothelialization of small diameter grafts is rapid and firm adhesion of endothelial cells upon exposure to flow. To retain integrins on the cell surface, we assessed the effects of trypsin concentration, the duration of trypsin incubation, and trypsin neutralization methods on endothelial cell adhesion. Human umbilical vein endothelial cells which were detached using 0.025% trypsin for 5 min and seeded onto glass pretreated with fibronectin had close to 100% cell retention when shear stresses as high as 200 dyn/cm2 were applied for 2 min. An equivalent level of cell retention was observed on fibronectin coated Teflon-AF for shear stresses up to 60 dyn/cm2 applied for 4h. Using 0.025% trypsin, initial cell spreading and cell surface alpha5beta1 integrins were increased relative to cells treated with 0.5% trypsin. After 1h of attachment, focal adhesions formed when low trypsin concentrations were used but were less evident with high trypsin concentrations. These results showed that low trypsin concentrations produced faster spreading, a higher number of intact integrins, and rapid focal adhesion formation.

Full Text

Duke Authors

Cited Authors

  • Brown, MA; Wallace, CS; Anamelechi, CC; Clermont, E; Reichert, WM; Truskey, GA

Published Date

  • September 2007

Published In

Volume / Issue

  • 28 / 27

Start / End Page

  • 3928 - 3935

PubMed ID

  • 17570483

Pubmed Central ID

  • PMC2025691

Electronic International Standard Serial Number (EISSN)

  • 1878-5905

International Standard Serial Number (ISSN)

  • 0142-9612

Digital Object Identifier (DOI)

  • 10.1016/j.biomaterials.2007.05.009


  • eng