Leukocyte Migration and Deformation in Collagen Gels and Microfabricated Constrictions
In multicellular organisms, cell migration is a complex process. Examples of this are observed during cell motility in the interstitial space, full of extracellular matrix fibers, or when cells pass through endothelial layers to colonize or exit specific tissues. A common parameter for both situations is the fast adaptation of the cellular shape to their irregular landscape. In this chapter, we describe two methods to study cell migration in complex environments. The first one consists in a multichamber device for the visualization of cell haptotaxis toward the collagen-binding chemokine CCL21. This method is used to study cell migration as well as deformations during directed motility, as in the interstitial space. The second one consists in microfabricated channels connected to small constrictions. This procedure allows the study of cell deformations when single cells migrate through small holes and it is analogous to passage of cells through endothelial layers, resulting in a simplified system to study the mechanisms operating during transvasation. Both methods combined provide a powerful hub for the study of cell plasticity during migration in complex environments.
Key wordsCell deformation Chemokine Chemotaxis Collagen Constriction Cytoskeleton Dendritic cell Haptotaxis Leukocyte Microchannel
PV was supported by the Association Nationale pour la Recherche (MOTILE project, ANR-16-CE13-0009) and by the Inserm through a permanent research scientist position. This work has received the support of Institut Pierre-Gilles de Gennes (équipement d’excellence, “Investissements d’avenir”, programme ANR-10-EQPX-34).
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