Molecular and spatial landmarks of early mouse skin development.

Jacob T, Annusver K, Czarnewski P, Dalessandri T, Kalk C, Levra Levron C, Campamà Sanz N, Kastriti ME, Mikkola ML, Rendl M, Lichtenberger BM, Donati G, Björklund ÅK, Kasper M

Dev. Cell - (-) - [2023-08-13; online 2023-08-13]

A wealth of specialized cell populations within the skin facilitates its hair-producing, protective, sensory, and thermoregulatory functions. How the vast cell-type diversity and tissue architecture develops is largely unexplored. Here, with single-cell transcriptomics, spatial cell-type assignment, and cell-lineage tracing, we deconstruct early embryonic mouse skin during the key transitions from seemingly uniform developmental precursor states to a multilayered, multilineage epithelium, and complex dermal identity. We identify the spatiotemporal emergence of hair-follicle-inducing, muscle-supportive, and fascia-forming fibroblasts. We also demonstrate the formation of the panniculus carnosus muscle (PCM), sprouting blood vessels without pericyte coverage, and the earliest residence of mast and dendritic immune cells in skin. Finally, we identify an unexpected epithelial heterogeneity within the early single-layered epidermis and a signaling-rich periderm layer. Overall, this cellular and molecular blueprint of early skin development-which can be explored at histological landmarks and highlights unprecedented dynamic interactions among skin cells.

Bioinformatics Long-term Support WABI [Collaborative]

Bioinformatics Support, Infrastructure and Training [Collaborative]

Eukaryotic Single Cell Genomics (ESCG) [Service]

NGI Short read [Service]

NGI Single cell [Service]

NGI Stockholm (Genomics Applications) [Service]

NGI Stockholm (Genomics Production) [Service]

National Genomics Infrastructure [Service]

PubMed 37591247

DOI 10.1016/j.devcel.2023.07.015

Crossref 10.1016/j.devcel.2023.07.015

pii: S1534-5807(23)00362-3

Publications 9.5.0