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2016 ; 14
(10
): 2281-8
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Plasticity between Epithelial and Mesenchymal States Unlinks EMT from
Metastasis-Enhancing Stem Cell Capacity
#MMPMID26947068
Beerling E
; Seinstra D
; de Wit E
; Kester L
; van der Velden D
; Maynard C
; Schäfer R
; van Diest P
; Voest E
; van Oudenaarden A
; Vrisekoop N
; van Rheenen J
Cell Rep
2016[Mar]; 14
(10
): 2281-8
PMID26947068
show ga
Forced overexpression and/or downregulation of proteins regulating
epithelial-to-mesenchymal transition (EMT) has been reported to alter metastasis
by changing migration and stem cell capacity of tumor cells. However, these
manipulations artificially keep cells in fixed states, while in vivo cells may
adapt transient and reversible states. Here, we have tested the existence and
role of epithelial-mesenchymal plasticity in metastasis of mammary tumors without
artificially modifying EMT regulators. In these tumors, we found by intravital
microscopy that the motile tumor cells have undergone EMT, while their epithelial
counterparts were not migratory. Moreover, we found that epithelial-mesenchymal
plasticity renders any EMT-induced stemness differences, as reported previously,
irrelevant for metastatic outgrowth, because mesenchymal cells that arrive at
secondary sites convert to the epithelial state within one or two divisions,
thereby obtaining the same stem cell potential as their arrived epithelial
counterparts. We conclude that epithelial-mesenchymal plasticity supports
migration but additionally eliminates stemness-enhanced metastatic outgrowth
differences.