Continuous photobleaching to study the growth modes of focal adhesions

• Verfasst von: Beer, Alex G. F. de [VerfasserIn]
• Verfasst von: Majer, Günter [VerfasserIn]
• Verfasst von: Roke, Sylvie [VerfasserIn]
• Verfasst von: Spatz, Joachim P. [VerfasserIn]
• Titel: Continuous photobleaching to study the growth modes of focal adhesions
• Verf.angabe: Alex G.F. de Beer, Günter Majer, Sylvie Roke, Joachim P. Spatz
• Jahr: 2010
• Umfang: 12 S.
• Fussnoten: Online veröffentlicht: 02 April 2012 ; Gesehen am 04.09.2023
• Titel Quelle: Enthalten in: Journal of adhesion science and technology
• Ort Quelle: London [u.a.] : Taylor & Francis, 1987
• Jahr Quelle: 2010
• Band/Heft Quelle: 24(2010), 13-14, Seite 2323-2334
• ISSN Quelle: 1568-5616
• DOI: doi:10.1163/016942410X508046
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: FOCAL ADHESION
• Sach-SW: FRAP
• Sach-SW: INTEGRIN
• Sach-SW: PHOTOBLEACHING
• Sach-SW: TIRF
• K10plus-PPN: 1858705592

Abstract

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 m2/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.