Fgf signalling triggers an intrinsic mesodermal timer that determines the duration of limb patterning.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
20 09 2023
20 09 2023
Historique:
received:
22
02
2023
accepted:
05
09
2023
medline:
22
9
2023
pubmed:
21
9
2023
entrez:
20
9
2023
Statut:
epublish
Résumé
Complex signalling between the apical ectodermal ridge (AER - a thickening of the distal epithelium) and the mesoderm controls limb patterning along the proximo-distal axis (humerus to digits). However, the essential in vivo requirement for AER-Fgf signalling makes it difficult to understand the exact roles that it fulfils. To overcome this barrier, we developed an amenable ex vivo chick wing tissue explant system that faithfully replicates in vivo parameters. Using inhibition experiments and RNA-sequencing, we identify a transient role for Fgfs in triggering the distal patterning phase. Fgfs are then dispensable for the maintenance of an intrinsic mesodermal transcriptome, which controls proliferation/differentiation timing and the duration of patterning. We also uncover additional roles for Fgf signalling in maintaining AER-related gene expression and in suppressing myogenesis. We describe a simple logic for limb patterning duration, which is potentially applicable to other systems, including the main body axis.
Identifiants
pubmed: 37730682
doi: 10.1038/s41467-023-41457-6
pii: 10.1038/s41467-023-41457-6
pmc: PMC10511490
doi:
Substances chimiques
Fibroblast Growth Factors
62031-54-3
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
5841Subventions
Organisme : Wellcome Trust
ID : 202756/Z/16/Z
Pays : United Kingdom
Informations de copyright
© 2023. Springer Nature Limited.
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