Atrial natriuretic peptide type C induces a cell-cycle switch from proliferation to differentiation in brain-derived neurotrophic factor- or nerve growth factor-primed olfactory receptor neurons

P. Jeanette Simpson, Ian Miller, Cheil Moon, Andrea L. Hanlon, Daniel J. Liebl, Gabriele V. Ronnett

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

With the discovery of postnatal stem cells within the brain, it has become important to understand how extracellular factors might affect the maturation of neuronal precursors in the postnatal brain. Neurotrophic factors are known to play a role in neuronal development but display pleiotrophic effects, in part because of their physiological interactions with other factors. One factor positioned to interact with neurotrophins in the brains of postnatal animals is atrial C-type natriuretic peptide (CNP). In this study, we used olfactory receptor neurons (ORNs) as a model, because their precursors demonstrate the most robust and functional postnatal neurogenesis of those systems thus far described. We examined the effects of brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) and the interactions of these neurotrophins and CNP in postnatal olfactory neuronal precursors. Results obtained using mice with targeted deletion of the gene for BDNF indicated that BDNF is a neuroproliferation-inducing and survival factor for ORN precursors. These roles were confirmed in vitro using primary cultures of ORNs. NGF was found to be a proliferation-inducing factor but not a survival factor. The addition of CNP to either BDNF- or NGF-treated neuronal precursors resulted in an inhibition of proliferation and the promotion of maturation. These effects were accompanied by changes in cell-cycle proteins that suggest possible mechanisms for these effects. Thus, CNP may function in the postnatal brain to regulate the exit from the cell cycle in neuronal precursor cells.

Original languageEnglish (US)
Pages (from-to)5536-5551
Number of pages16
JournalJournal of Neuroscience
Volume22
Issue number13
DOIs
StatePublished - Jul 1 2002

Keywords

  • Atrial natriuretic peptide type C
  • Cell cycle
  • Neurogenesis
  • Neurotrophins
  • Olfaction
  • Olfactory receptor neurons

ASJC Scopus subject areas

  • Neuroscience(all)

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