Why epithelial cells collectively move against a traveling signal wave


Abstract in English

The directional collective migration along traveling signal waves is indispensable for the development in multicellular tissues. However, little is known about how the net motion occurs under wave-like activation while the forces are balanced. To reveal the law of migration with the traveling wave, we study collective migration by considering the signal-dependent coordination of contractile stress and adhesive friction to the substratum. We show that their interplay forms a non-reciprocal motion that enhances the backward motion against a signal wave. Moreover, the relaxation dynamics during this non-reciprocal motion realize a noise filter by which the migration velocity is optimized under a certain wave velocity. Our finding thus brings deep understanding of the rectified migration by a traveling signal wave, which may be involved in wound healing of epithelial tissues.

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