Neural stem cells induce the formation of their physical niche during organogenesis
Ali Seleit,
Isabel Krämer,
Bea F Riebesehl,
Elizabeth M Ambrosio,
Julian S Stolper,
Colin Q Lischik,
Nicolas Dross,
Lazaro Centanin
Affiliations
Ali Seleit
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany; The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology, University of Heidelberg, Heidelberg, Germany
Isabel Krämer
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany; The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology, University of Heidelberg, Heidelberg, Germany
Bea F Riebesehl
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany
Elizabeth M Ambrosio
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany
Julian S Stolper
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany; Murdoch Childrens Research Institute, University of Melbourne, Melbourne, Australia
Colin Q Lischik
Animal Physiology and Development, Centre for Organismal Studies Heidelberg, Heidelberg, Germany; The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology, University of Heidelberg, Heidelberg, Germany
Nicolas Dross
Nikon Imaging Center at the University of Heidelberg, Heidelberg, Germany
Most organs rely on stem cells to maintain homeostasis during post-embryonic life. Typically, stem cells of independent lineages work coordinately within mature organs to ensure proper ratios of cell types. Little is known, however, on how these different stem cells locate to forming organs during development. Here we show that neuromasts of the posterior lateral line in medaka are composed of two independent life-long lineages with different embryonic origins. Clonal analysis and 4D imaging revealed a hierarchical organisation with instructing and responding roles: an inner, neural lineage induces the formation of an outer, border cell lineage (nBC) from the skin epithelium. Our results demonstrate that the neural lineage is necessary and sufficient to generate nBCs highlighting self-organisation principles at the level of the entire embryo. We hypothesise that induction of surrounding tissues plays a major role during the establishment of vertebrate stem cell niches.
