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Meccanica

, Volume 52, Issue 14, pp 3389–3398 | Cite as

Mechanosensing of substrate stiffness regulates focal adhesions dynamics in cell

  • Sabato FuscoEmail author
  • Valeria Panzetta
  • Paolo A. Netti
Active Behavior in Soft Matter and Mechanobiology

Abstract

Cell mechanical recognition of extracellular matrix determines the cell activities and functions. Focal adhesions are part of the cell mechanosensing machinery and, operating at the very dynamic interface between cell and extracellular matrix, can operate this recognition and trigger conformational, functional and behavioral modification of the cell. To investigate how the dynamic of assembly and disassembly of focal adhesion are influenced by the substrate mechanics we developed a novel procedure. The analysis consists of the over time tracking of focal adhesion structures in a stable cell line of NIH/3T3 expressing fluorescent pmKate2-paxillin. From collected signals and by their autocorrelation we evaluated the average lifetime and assembly rate of focal adhesion as function of substrate stiffness. Further, by signals cross-correlation we obtained information about the mechanical nature of cytoskeleton and its network. This quantitative approach to focal adhesion dynamics characterization was presented in this study as an investigation tool for cell mechanobiology.

Keywords

Cell mechanosensing Extracellular matrix Stiffness Focal adhesions dynamics 

Notes

Acknowledgements

The authors acknowledge Mrs. R. Infranca for manuscript proofreading and editing.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11012_2017_676_MOESM1_ESM.docx (6.8 mb)
Supplementary material 1 (DOCX 6948 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Sabato Fusco
    • 1
    Email author
  • Valeria Panzetta
    • 1
  • Paolo A. Netti
    • 1
    • 2
  1. 1.Center for Advanced Biomaterials for Health Care IIT@CRIBIstituto Italiano di TecnologiaNaplesItaly
  2. 2.Interdisciplinary Research Centre on Biomaterials, CRIB and Department of Chemical, Materials and Industrial Production EngineeringUniversity of Naples Federico IINaplesItaly

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