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Published online
doi:10.1083/jcb.200807195
The Journal of Cell Biology, Vol. 185, No. 1, 11-19
The Rockefeller University Press, 0021-9525 $30.00
© Sabeh et al.
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Protease-dependent versus -independent cancer cell invasion programs: three-dimensional amoeboid movement revisited

Tissue invasion during metastasis requires cancer cells to negotiate a stromal environment dominated by cross-linked networks of type I collagen. Although cancer cells are known to use proteinases to sever collagen networks and thus ease their passage through these barriers, migration across extracellular matrices has also been reported to occur by protease-independent mechanisms, whereby cells squeeze through collagen-lined pores by adopting an ameboid phenotype. We investigate these alternate models of motility here and demonstrate that cancer cells have an absolute requirement for the membrane-anchored metalloproteinase MT1-MMP for invasion, and that protease-independent mechanisms of cell migration are only plausible when the collagen network is devoid of the covalent cross-links that characterize normal tissues.



Farideh Sabeh, Ryoko Shimizu-Hirota, and Stephen J. Weiss

Division of Molecular Medicine and Genetics, Department of Internal Medicine, Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109

Correspondence to Stephen J. Weiss: sjweiss{at}umich.edu

© 2009 Sabeh et al.
This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.jcb.org/misc/terms.shtml). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 3.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/3.0/).


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