FGF signalling generates ventral telencephalic cells independently of SHH

Grigoriy Gutin, Marie Fernandes, Laura Palazzolo, Hun Ki Paek, Kai Yu, David M. Ornitz, Susan K. McConnell, Jean M. Hébert

Research output: Contribution to journalArticle

111 Scopus citations

Abstract

Sonic hedgehog (SHH) is required to generate ventral cell types throughout the central nervous system. Its role in directly specifying ventral cells, however, has recently been questioned because loss of the Shh gene has little effect on ventral development if the Gli3 gene is also mutant. Consequently, another ventral determinant must exist. Here, genetic evidence establishes that FGFs are required for ventral telencephalon development. First, simultaneous deletion of Fgfr1 and Fgfr3 specifically in the telencephalon results in the loss of differentiated ventromedial cells; and second, in the Fgfr1;Fgfr2 double mutant, ventral precursor cells are lost, mimicking the phenotype obtained previously with a loss of SHH signalling. Yet, in the Fgfr1;Fgfr2 mutant, Shh remains expressed, as does Gli1, the transcription of which depends on SHH activity, suggesting that FGF signalling acts independently of SHH to generate ventral precursors. Moreover, the Fgfr1;Fgfr2 phenotype, unlike the Shh phenotype, is not rescued by loss of Gli3, further indicating that FGFs act downstream of Shh and Gli3 to generate ventral telencephalic cell types.

Original languageEnglish (US)
Pages (from-to)2937-2946
Number of pages10
JournalDevelopment
Volume133
Issue number15
DOIs
StatePublished - Aug 1 2006

Keywords

  • Basal ganglia
  • FGF
  • GLI3
  • Ganglionic eminence
  • Mouse
  • Patterning
  • SHH
  • Telencephalon

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology

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  • Cite this

    Gutin, G., Fernandes, M., Palazzolo, L., Paek, H. K., Yu, K., Ornitz, D. M., McConnell, S. K., & Hébert, J. M. (2006). FGF signalling generates ventral telencephalic cells independently of SHH. Development, 133(15), 2937-2946. https://doi.org/10.1242/dev.02465