Ptf1a determines GABAergic over glutamatergic neuronal cell fate in the spinal cord dorsal horn

Stacey M. Glasgow, R. Michael Henke, Raymond J. MacDonald, Christopher V E Wright, Jane E. Johnson

Research output: Contribution to journalArticle

155 Citations (Scopus)

Abstract

Mutations in the human and mouse PTF1A/Ptf1a genes result in permanent diabetes mellitus and cerebellar agenesis. We show that Ptf1a is present in precursors to GABAergic neurons in spinal cord dorsal horn as well as the cerebellum. A null mutation in Ptf1a reveals its requirement for the dorsal horn GABAergic neurons. Specifically, Ptf1a is required for the generation of early-born (dI4, E10.5) and late-born (dILA, E12.5) dorsal interneuron populations identified by homeodomain factors Lhx1/5 and Pax2. Furthermore, in the absence of Ptf1a, the dI4 dorsal interneurons trans-fate to dI5 (Lmx1b+), and the dILA to dILB (Lmx1b+;Tlx3+). This mis-specification of neurons results in a complete loss of inhibitory GABAergic neurons and an increase in the excitatory glutamatergic neurons in the dorsal horn of the spinal cord by E16.5. Thus, Ptf1a function is essential for GABAergic over glutamatergic neuronal cell fates in the developing spinal cord, and provides an important genetic link between inhibitory and excitatory interneuron development.

Original languageEnglish (US)
Pages (from-to)5461-5469
Number of pages9
JournalDevelopment
Volume132
Issue number24
DOIs
StatePublished - Dec 2005

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GABAergic Neurons
Interneurons
Posterior Horn Cells
Mutation
Cerebellum
Spinal Cord
Diabetes Mellitus
Neurons
Population
Genes
Spinal Cord Dorsal Horn

Keywords

  • BHLH transcription factor
  • Dorsal horn inhibitory neurons
  • Mouse
  • Spinal cord development

ASJC Scopus subject areas

  • Anatomy
  • Cell Biology

Cite this

Ptf1a determines GABAergic over glutamatergic neuronal cell fate in the spinal cord dorsal horn. / Glasgow, Stacey M.; Henke, R. Michael; MacDonald, Raymond J.; Wright, Christopher V E; Johnson, Jane E.

In: Development, Vol. 132, No. 24, 12.2005, p. 5461-5469.

Research output: Contribution to journalArticle

Glasgow, Stacey M. ; Henke, R. Michael ; MacDonald, Raymond J. ; Wright, Christopher V E ; Johnson, Jane E. / Ptf1a determines GABAergic over glutamatergic neuronal cell fate in the spinal cord dorsal horn. In: Development. 2005 ; Vol. 132, No. 24. pp. 5461-5469.
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