Continuous Photobleaching to Study the Growth Modes of Focal Adhesions

We combine total internal reflection fluorescence microscopy with continuous photobleaching to study the growth mode of focal adhesions in rat embryonic fibroblasts (REF-52). We measured GFP-labelled β3 integrin, which exhibits a diffusion rate of 10 -14-10 -13 m 2/s when it is not bound to a focal adhesion. We show that exchange of β3 integrin between focal adhesions and the surrounding membrane occurs only at the edges of the focal adhesion. We, therefore, conclude that focal adhesions show an edge-on/edge-off growth, in contrast to the bulk-on/bulk-off growth mode that is assumed in many theoretical treatments. © 2010 VSP.


Published in:
Journal of Adhesion Science and Technology, 24, 13-14, 2323-2334
Year:
2010
ISSN:
0169-4243
Other identifiers:
View record in Web of Science
Scopus: 2-s2.0-77957556151
Laboratories:




 Record created 2013-02-08, last modified 2018-09-13


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)