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Dev Dyn 2023 Feb 01;2522:294-304. doi: 10.1002/dvdy.535.
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Transcriptome analysis of the response to thyroid hormone in Xenopus neural stem and progenitor cells.

Cordero-Véliz C , Larraín J , Faunes F .

BACKGROUND: The thyroid hormones-thyroxine (T4) and 3,5,3'triiodothyronine (T3)-regulate the development of the central nervous system (CNS) in vertebrates by acting in different cell types. Although several T3 target genes have been identified in the brain, the changes in the transcriptome in response to T3 specifically in neural stem and progenitor cells (NSPCs) during the early steps of NSPCs activation and neurogenesis have not been studied in vivo. Here, we characterized the transcriptome of FACS-sorted NSPCs in response to T3 during Xenopus laevis metamorphosis. RESULTS: We identified 1252 upregulated and 726 downregulated genes after 16 hours of T3 exposure. Gene ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that T3-upregulated genes were significantly enriched in rRNA processing and maturation, protein folding, ribosome biogenesis, translation, mitochondrial function, and proteasome. These results suggest that NSPCs activation induced by T3 is characterized by an early proteome remodeling through the synthesis of the translation machinery and the degradation of proteins by the proteasome. CONCLUSION: This work provides new insights into the dynamics of activation of NPSCs in vivo in response to T3 during a critical period of neurogenesis in the metamorphosis.

PubMed ID: 36065982
Article link: Dev Dyn
Grant support: [+]

Species referenced: Xenopus tropicalis Xenopus laevis
Genes referenced: ankrd12 ccdc57 chac1 coq8a dio3 eef1a1 jade2 klf9 manf mat2a nfic nr3c2 thibz znf395
GO keywords: thyroid gland development [+]

Article Images: [+] show captions