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Leaders in collective migration: are front cells really endowed with a particular set of skills? version 1; peer review: 2 approved
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Leaders in collective migration: are front cells really endowed with a particular set of skills? version 1; peer review: 2 approved
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Journal Article
Leaders in collective migration: are front cells really endowed with a particular set of skills? version 1; peer review: 2 approved
2017
Overview
Collective cell migration is the coordinated movement emerging from the interaction of at least two cells. In multicellular organisms, collective cell migration is ubiquitous. During development, embryonic cells often travel in numbers, whereas in adults, epithelial cells close wounds collectively. There is often a division of labour and two categories of cells have been proposed: leaders and followers. These two terms imply that followers are subordinated to leaders whose proposed broad range of actions significantly biases the direction of the group of cells towards a specific target. These two terms are also tied to topology. Leaders are at the front while followers are located behind them. Here, we review recent work on some of the main experimental models for collective cell migration, concluding that leader-follower terminology may not be the most appropriate. It appears that not all collectively migrating groups are driven by cells located at the front. Moreover, the qualities that define leaders (pathfinding, traction forces and matrix remodelling) are not specific to front cells. These observations indicate that the terms leaders and followers are not suited to every case. We think that it would be more accurate to dissociate the function of a cell from its position in the group. The position of cells can be precisely defined with respect to the direction of movement by purely topological terms such as \"front\" or \"rear\" cells. In addition, we propose the more ample and strictly functional definition of \"steering cells\" which are able to determine the directionality of movement for the entire group. In this context, a leader cell represents only a specific case in which a steering cell is positioned at the front of the group.
Publisher
Faculty of 1000 Ltd,Faculty of 1000,F1000Research,F1000 Research Ltd
Subject
