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Cross-link debonding in actin networks: influence on mechanical properties
Royal Institute of Technology, (KTH).
Royal Institute of Technology, (KTH).
Royal Institute of Technology, (KTH).
2015 (English)In: International Journal of Experimental and Computational Biomechanics, ISSN 1755-8735, Vol. 3, no 1, 16-26 p.Article in journal (Refereed) Published
Abstract [en]

The actin cytoskeleton is essential for the continued function and survival of the cell. A peculiar mechanical characteristic of actin networks is their remodelling ability, providing them with a time-dependent response to mechanical forces. In cross-linked actin networks, this behaviour is typically tuned by the binding affinity of the cross-link. We propose that the debonding of a cross-link between filaments can be modelled using a stochastic approach, in which the activation energy for a bond is modified by a term to account for mechanical strain energy. By use of a finite element model, we perform numerical analyses in which we first compare the model behaviour to experimental results. The computed and experimental results are in good agreement for short time scales, but over longer time scales the stress is overestimated. However, it does provide a possible explanation for experimentally observed strain-rate dependence as well as strain-softening at longer time scales.

Place, publisher, year, edition, pages
2015. Vol. 3, no 1, 16-26 p.
National Category
Other Medical Engineering
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-58920DOI: 10.1504/IJECB.2015.067679OAI: oai:DiVA.org:lnu-58920DiVA: diva2:1055013
Available from: 2016-12-09 Created: 2016-12-09 Last updated: 2016-12-19Bibliographically approved

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CiteExportLink to record
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