FEBS Letters
Volume 582, Issue 14 , Pages 2086-2092, 18 June 2008

How do in vitro reconstituted actin-based motility assays provide insight into in vivo behavior?

Edited by Christos Stournaras

Cytoskeleton Dynamics and Motility Group, LEBS, UPR 3082, CNRS, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France

Received 21 February 2008; accepted 25 February 2008. published online 05 March 2008.

Abstract 

Recent live cell image analysis of actin dynamics in lamellipodia of motile cells has shown that regulated treadmilling, which supports actin-based propulsion of functionalized particles in biomimetic reconstituted motility assays, is also responsible for lamellipodia extension. In both cases, filaments are created by branching with Arp2/3 complex only at the membrane or particle surface, grow transiently and are capped; ADF/cofilin enhances the treadmilling but does not sever filaments in the body of the meshwork. Differences between the cellular and biomimetic systems suggest that additional regulatory mechanisms take place in lamellipodia.

Keywords: Actin dynamics, Motility, Treadmilling, Lamellipodium, Biomimetic reconstituted systems

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PII: S0014-5793(08)00183-X

doi:10.1016/j.febslet.2008.02.065

FEBS Letters
Volume 582, Issue 14 , Pages 2086-2092, 18 June 2008

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