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Matrix elasticity directs stem cell lineage specification.

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Affiliations

  • 1. Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, 19104, USA.
      Authors
    • Engler AJ 1
    (1 author)

ORCIDs linked to this article

Cell, 01 Aug 2006, 126(4):677-689
https://doi.org/10.1016/j.cell.2006.06.044 PMID: 16923388 

A comment on this article appears in "Environment dictates behaviour." Nat Rev Mol Cell Biol. 2010 Oct;11(10):679. A comment on this article appears in "Matrix control of stem cell fate." Cell. 2006 Aug 25;126(4):645-7.

Abstract 

Microenvironments appear important in stem cell lineage specification but can be difficult to adequately characterize or control with soft tissues. Naive mesenchymal stem cells (MSCs) are shown here to specify lineage and commit to phenotypes with extreme sensitivity to tissue-level elasticity. Soft matrices that mimic brain are neurogenic, stiffer matrices that mimic muscle are myogenic, and comparatively rigid matrices that mimic collagenous bone prove osteogenic. During the initial week in culture, reprogramming of these lineages is possible with addition of soluble induction factors, but after several weeks in culture, the cells commit to the lineage specified by matrix elasticity, consistent with the elasticity-insensitive commitment of differentiated cell types. Inhibition of nonmuscle myosin II blocks all elasticity-directed lineage specification-without strongly perturbing many other aspects of cell function and shape. The results have significant implications for understanding physical effects of the in vivo microenvironment and also for therapeutic uses of stem cells.

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Read article at publisher's site: https://doi.org/10.1016/j.cell.2006.06.044

Read article for free, from open access legal sources, via Unpaywall: http://www.cell.com/article/S0092867406009615/pdfUnpaywall

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