ZFIN ID: ZDB-PUB-190530-11
Thyroid hormone regulates distinct paths to maturation in pigment cell lineages
Saunders, L.M., Mishra, A.K., Aman, A.J., Lewis, V.M., Toomey, M.B., Packer, J.S., Qiu, X., McFaline-Figueroa, J.L., Corbo, J.C., Trapnell, C., Parichy, D.M.
Date: 2019
Source: eLIFE   8: (Journal)
Registered Authors: Aman, Andy, Parichy, David M.
Keywords: developmental biology, genetics, genomics, zebrafish
Microarrays: GEO:GSE131136
MeSH Terms:
  • Animals
  • Cell Differentiation/drug effects*
  • Gene Expression Profiling
  • Gene Expression Regulation, Developmental/drug effects
  • Neural Crest/drug effects*
  • Pigments, Biological/metabolism
  • Thyroid Hormones/metabolism*
  • Zebrafish
PubMed: 31140974 Full text @ Elife
Thyroid hormone (TH) regulates diverse developmental events and can drive disparate cellular outcomes. In zebrafish, TH has opposite effects on neural crest derived pigment cells of the adult stripe pattern, limiting melanophore population expansion, yet increasing yellow/orange xanthophore numbers. To learn how TH elicits seemingly opposite responses in cells having a common embryological origin, we analyzed individual transcriptomes from thousands of neural crest derived cells, reconstructed developmental trajectories, identified pigment cell-lineage specific responses to TH, and assessed roles for TH receptors. We show that TH promotes maturation of both cell types but in distinct ways. In melanophores, TH drives terminal differentiation, limiting final cell numbers. In xanthophores, TH promotes accumulation of orange carotenoids, making the cells visible. TH receptors act primarily to repress these programs when TH is limiting. Our findings show how a single endocrine factor integrates very different cellular activities during the generation of adult form.