Journal
JOURNAL OF CELL BIOLOGY
Volume 197, Issue 3, Pages 346-348Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.201204039
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Fibroblasts migrate on two-dimensional (2D) surfaces by forming lamellipodia-actin-rich extensions at the leading edge of the cell that have been well characterized. In this issue, Petrie et al. (2012. J. Cell Biol. http://dx.doi.org/10.1083/jcb.201201124) show that in some 3D environments, including tissue explants, fibroblasts project different structures, termed lobopodia, at the leading edge. Lobopodia still assemble focal adhesions; however, similar to membrane blebs, they are driven by actomyosin contraction and do not accumulate active Rac, Cdc42, and phosphatidylinositol 3-kinases.
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