Quantification of magnetically induced changes in ECM local apparent stiffness

Sahan C.B. Herath, Du Yue, Shi Hui, Min Cheol Kim, Dong An Wang, Qingguo Wang, Krystyn J. Van Vliet, Harry Asada, Peter C.Y. Chen

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The stiffness of the extracellular matrix (ECM) is known to influence cell behavior. The ability to manipulate the stiffness of ECM has important implications in understanding how cells interact mechanically with their microenvironment. This article describes an approach to manipulating the stiffness ECM, whereby magnetic beads are embedded in the ECM through bioconjugation between the streptavidin-coated beads and the collagen fibers and then manipulated by an external magnetic field. It also reports both analytical results (obtained by formal modeling and numerical simulation) and statistically meaningful experimental results (obtained by atomic force microscopy) that demonstrate the effectiveness of this approach. These results clearly suggest the possibility of creating desired stiffness gradients in ECM in vitro to influence cell behavior.

Original languageEnglish
Pages (from-to)332-341
Number of pages10
JournalBiophysical Journal
Issue number1
Publication statusPublished - 7 Jan 2014
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics


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