title: Live imaging reveals the progenitors and cell dynamics of limb regeneration.
abstract: Regeneration is a complex and dynamic process, mobilizing diverse cell types and remodelling tissues over long time periods. Tracking cell fate and behaviour during regeneration in active adult animals is especially challenging. Here, we establish continuous live imaging of leg regeneration at single-cell resolution in the crustaceanParhyale hawaiensis. By live recordings encompassing the first 4-5 days after amputation, we capture the cellular events that contribute to wound closure and morphogenesis of regenerating legs with unprecedented resolution and temporal detail. Using these recordings we are able to track cell lineages, to generate fate maps of the blastema and to identify the progenitors of regenerated epidermis. We find that there are no specialized stem cells for the epidermis. Most epidermal cells in the distal part of the leg stump proliferate, acquire new positional values and contribute to new segments in the regenerating leg.
authors: Institut de Génomique Fonctionnelle de Lyon (IGFL), École Normale Supérieure de Lyon, Lyon, France.|Centre National de la Recherche Scientifique (CNRS), , France.
authors: Frederike
authors: F
authors: Alwes
authors: Institut de Génomique Fonctionnelle de Lyon (IGFL), École Normale Supérieure de Lyon, Lyon, France.|Centre National de la Recherche Scientifique (CNRS), , France.
authors: Camille
authors: C
authors: Enjolras
authors: Institut de Génomique Fonctionnelle de Lyon (IGFL), École Normale Supérieure de Lyon, Lyon, France.|Centre National de la Recherche Scientifique (CNRS), , France.
authors: Michalis
authors: 0000-0002-6803-7251
authors: M
authors: Averof
mesh_terms: D033304:Amphipoda / Q000033:anatomy & histology / Q000502:physiology*; D000818:Animals; D002454:Cell Differentiation; D005121:Extremities / Q000033:anatomy & histology / Q000254:growth & development*; D000069416:Intravital Microscopy; D012038:Regeneration; D013234:Stem Cells / Q000502:physiology*
keywords: Parhyale hawaiensis; developmental biology; live imaging; regeneration; stem cells