Jump to main content
Jump to site search

Issue 29, 2016
Previous Article Next Article

Cell-sized liposome doublets reveal active tension build-up driven by acto-myosin dynamics

Author affiliations

Abstract

Cells modulate their shape to fulfill specific functions, mediated by the cell cortex, a thin actin shell bound to the plasma membrane. Myosin motor activity, together with actin dynamics, contributes to cortical tension. Here, we examine the individual contributions of actin polymerization and myosin activity to tension increase with a non-invasive method. Cell-sized liposome doublets are covered with either a stabilized actin cortex of preformed actin filaments, or a dynamic branched actin network polymerizing at the membrane. The addition of myosin II minifilaments in both cases triggers a change in doublet shape that is unambiguously related to a tension increase. Preformed actin filaments allow us to evaluate the effect of myosin alone while, with dynamic actin cortices, we examine the synergy of actin polymerization and myosin motors in driving shape changes. Our assay paves the way for a quantification of tension changes triggered by various actin-associated proteins in a cell-sized system.

Graphical abstract: Cell-sized liposome doublets reveal active tension build-up driven by acto-myosin dynamics

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Apr 2016, accepted on 28 Jun 2016 and first published on 29 Jun 2016


Article type: Paper
DOI: 10.1039/C6SM00856A
Author version
available:
Download author version (PDF)
Soft Matter, 2016,12, 6223-6231

  •   Request permissions

    Cell-sized liposome doublets reveal active tension build-up driven by acto-myosin dynamics

    V. Caorsi, J. Lemière, C. Campillo, M. Bussonnier, J. Manzi, T. Betz, J. Plastino, K. Carvalho and C. Sykes, Soft Matter, 2016, 12, 6223
    DOI: 10.1039/C6SM00856A

Search articles by author

Spotlight

Advertisements