Fiche publication
Date publication
septembre 2018
Journal
Nature communications
Auteurs
Membres identifiés du Cancéropôle Est :
Dr ANSELME Karine
,
Dr PIEUCHOT Laurent
Tous les auteurs :
Pieuchot L, Marteau J, Guignandon A, Dos Santos T, Brigaud I, Chauvy PF, Cloatre T, Ponche A, Petithory T, Rougerie P, Vassaux M, Milan JL, Tusamda Wakhloo N, Spangenberg A, Bigerelle M, Anselme K
Lien Pubmed
Résumé
Cells have evolved multiple mechanisms to apprehend and adapt finely to their environment. Here we report a new cellular ability, which we term "curvotaxis" that enables the cells to respond to cell-scale curvature variations, a ubiquitous trait of cellular biotopes. We develop ultra-smooth sinusoidal surfaces presenting modulations of curvature in all directions, and monitor cell behavior on these topographic landscapes. We show that adherent cells avoid convex regions during their migration and position themselves in concave valleys. Live imaging combined with functional analysis shows that curvotaxis relies on a dynamic interplay between the nucleus and the cytoskeleton-the nucleus acting as a mechanical sensor that leads the migrating cell toward concave curvatures. Further analyses show that substratum curvature affects focal adhesions organization and dynamics, nuclear shape, and gene expression. Altogether, this work identifies curvotaxis as a new cellular guiding mechanism and promotes cell-scale curvature as an essential physical cue.
Mots clés
Animals, Cell Adhesion, genetics, Cell Line, Cell Movement, genetics, Cell Nucleus, physiology, Cell Shape, genetics, Cytoskeleton, physiology, Gene Expression, Humans, Mice, Microscopy, Confocal, Models, Biological, Surface Properties, Time-Lapse Imaging, methods
Référence
Nat Commun. 2018 Sep 28;9(1):3995
