Quantifying cellular traction forces in three dimensions.

Published

Journal Article

Cells engage in mechanical force exchange with their extracellular environment through tension generated by the cytoskeleton. A method combining laser scanning confocal microscopy (LSCM) and digital volume correlation (DVC) enables tracking and quantification of cell-mediated deformation of the extracellular matrix in all three spatial dimensions. Time-lapse confocal imaging of migrating 3T3 fibroblasts on fibronectin (FN)-modified polyacrylamide gels of varying thickness reveals significant in-plane (x, y) and normal (z) displacements, and illustrates the extent to which cells, even in nominally two-dimensional (2-D) environments, explore their surroundings in all three dimensions. The magnitudes of the measured displacements are independent of the elastic moduli of the gels. Analysis of the normal displacement profiles suggests that normal forces play important roles even in 2-D cell migration.

Full Text

Duke Authors

Cited Authors

  • Maskarinec, SA; Franck, C; Tirrell, DA; Ravichandran, G

Published Date

  • December 29, 2009

Published In

Volume / Issue

  • 106 / 52

Start / End Page

  • 22108 - 22113

PubMed ID

  • 20018765

Pubmed Central ID

  • 20018765

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

Digital Object Identifier (DOI)

  • 10.1073/pnas.0904565106

Language

  • eng

Conference Location

  • United States