
Mammals generate external coloration via dedicated pigment-producing cells but arrange pigment into patterns through mechanisms largely unknown. Here, using mice as models, we show that patterns ultimately emanate from dedicated pigment-receiving cells. These pigment recipients are epithelial cells that recruit melanocytes to their position in the skin and induce the transfer of melanin. We identify Foxn1 (a transcription factor) as an activator of this "pigment recipient phenotype" and Fgf2 (a growth factor and Foxn1 target) as a signal released by recipients. When Foxn1 - and thus dedicated recipients - are redistributed in the skin, new patterns of pigmentation develop, suggesting a mechanism for the evolution of coloration. We conclude that recipients provide a cutaneous template or blueprint that instructs melanocytes where to place pigment. As Foxn1 and Fgf2 also modulate epithelial growth and differentiation, the Foxn1 pathway should serve as a nexus coordinating cell division, differentiation, and pigmentation.
Keratinocytes, DEVBIO, Antibodies, Mice, DEVBIO; SIGNALING; Animals; Antibodies; Cell Differentiation; Cell Movement; Cell Proliferation; Cells, Cultured; Fibroblast Growth Factor 2; Forkhead Transcription Factors; Hair Color; Hair Follicle; Humans; Keratin-15; Keratin-5; Keratinocytes; Melanins; Melanocytes; Mice; Mice, Inbred C57BL; Mice, Inbred DBA; Mice, Knockout; Mice, Nude; Mice, Transgenic; Phenotype; Promoter Regions, Genetic; RNA, Messenger; Skin; Skin Pigmentation; Time Factors; Transcription, Genetic; Transduction, Genetic; Signal Transduction; Cell Biology; Molecular Biology, Cell Movement, Animals, Humans, Hair Color, Cells, Cultured, Cell Proliferation, Melanins, Mice, Knockout, Biochemistry, Genetics and Molecular Biology(all), Keratin-15, Cell Differentiation, Forkhead Transcription Factors, Mice, Inbred C57BL, SIGNALING, Mice, Inbred DBA, Keratin-5, Melanocytes, Fibroblast Growth Factor 2, Hair Follicle
Keratinocytes, DEVBIO, Antibodies, Mice, DEVBIO; SIGNALING; Animals; Antibodies; Cell Differentiation; Cell Movement; Cell Proliferation; Cells, Cultured; Fibroblast Growth Factor 2; Forkhead Transcription Factors; Hair Color; Hair Follicle; Humans; Keratin-15; Keratin-5; Keratinocytes; Melanins; Melanocytes; Mice; Mice, Inbred C57BL; Mice, Inbred DBA; Mice, Knockout; Mice, Nude; Mice, Transgenic; Phenotype; Promoter Regions, Genetic; RNA, Messenger; Skin; Skin Pigmentation; Time Factors; Transcription, Genetic; Transduction, Genetic; Signal Transduction; Cell Biology; Molecular Biology, Cell Movement, Animals, Humans, Hair Color, Cells, Cultured, Cell Proliferation, Melanins, Mice, Knockout, Biochemistry, Genetics and Molecular Biology(all), Keratin-15, Cell Differentiation, Forkhead Transcription Factors, Mice, Inbred C57BL, SIGNALING, Mice, Inbred DBA, Keratin-5, Melanocytes, Fibroblast Growth Factor 2, Hair Follicle
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| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
