Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 14, 2014
Previous Article Next Article

Micro-topography influences blood platelet spreading

Author affiliations

Abstract

Injuries in blood vessels are accompanied by disrupted endothelial cell layers. Missing or destroyed endothelial cells lead to rough, structured surfaces on the micrometer scale. The first cells to arrive at the site of injury and to cover the wound are platelets, which subsequently drive blood clot formation. Therefore, investigating the interactions of platelets with structured surfaces is essential for the understanding of blood clotting. Here, we study the effects of underlying topography on platelet spreading using microstructured model substrates with varying area fractions of protein coating. We thereby distinguish the effects of (physical) topography and of (biochemical) protein availability. By analyzing the cell area and morphology, we find that the extent of protrusion formation – but not the total spread area – is determined by the area fractions of coating. The extent of filopodia formation is influenced by the availability of binding sites and the reaction of cells to the substrate's topography. The cells react to the structured substrate by avoiding topographic holes at the cell periphery and thus adapting their outer shape. This finding leads us to the conclusion that both chemically blocked and fibrinogen-coated holes represent “energetic obstacles” to the cells. Thus, the shape of the cell is governed by the interplay between spreading to an optimized area and adaption to the substrate topography.

Graphical abstract: Micro-topography influences blood platelet spreading

Back to tab navigation

Supplementary files

Article information


Submitted
13 Oct 2013
Accepted
23 Oct 2013
First published
23 Oct 2013

Soft Matter, 2014,10, 2365-2371
Article type
Paper

Micro-topography influences blood platelet spreading

R. Sandmann, S. S. G. Henriques, F. Rehfeldt and S. Köster, Soft Matter, 2014, 10, 2365
DOI: 10.1039/C3SM52636D

Social activity

Search articles by author

Spotlight

Advertisements