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2017 ; 144
(19
): 3440-3453
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Epithelial-mesenchymal transition transcription factors control pluripotent adult
stem cell migration in vivo in planarians
#MMPMID28893948
Abnave P
; Aboukhatwa E
; Kosaka N
; Thompson J
; Hill MA
; Aboobaker AA
Development
2017[Oct]; 144
(19
): 3440-3453
PMID28893948
show ga
Migration of stem cells underpins the physiology of metazoan animals. For tissues
to be maintained, stem cells and their progeny must migrate and differentiate in
the correct positions. This need is even more acute after tissue damage by
wounding or pathogenic infection. Inappropriate migration also underpins
metastasis. Despite this, few mechanistic studies address stem cell migration
during repair or homeostasis in adult tissues. Here, we present a shielded X-ray
irradiation assay that allows us to follow stem cell migration in planarians. We
demonstrate the use of this system to study the molecular control of stem cell
migration and show that snail-1, snail-2 and zeb-1 EMT transcription factor
homologs are necessary for cell migration to wound sites and for the
establishment of migratory cell morphology. We also observed that stem cells
undergo homeostatic migration to anterior regions that lack local stem cells, in
the absence of injury, maintaining tissue homeostasis. This requires the polarity
determinant notum Our work establishes planarians as a suitable model for further
in-depth study of the processes controlling stem cell migration in vivo.