Activation of latent precursors in the hippocampus is dependent on long-term potentiation

M. Kameda, C. J. Taylor, T. L. Walker, D. M. Black, W. C. Abraham, P. F. Bartlett

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The recent discovery of a large latent population of precursor cells in the dentate gyrus of adult mice led us to investigate whether activation of this population is regulated by synaptic activity, thereby explaining the observation that environmental signals can affect neurogenesis. Using a variety of stimulation protocols, we found that only a long-term potentiation (LTP)- inducing protocol activated the latent precursor pool, leading to increased neurogenesis in the dentate gyrus. LTP induced by high-frequency stimulation (HFS) of the perforant pathway in vivo produced a two-fold increase in the number of neurospheres cultured from the stimulated hippocampus, compared with the unstimulated hippocampus. No increase in neurosphere number or neurogenesis was observed when the HFS failed to induce LTP. These results show that LTP can activate latent neural precursor cells in the adult mouse dentate gyrus, thereby providing a direct mechanism for regulating activity-driven neurogenesis. In the future, it may be possible to utilize such learning- or stimulation-induced neurogenesis to overcome disorders characterized by neuronal loss.

Original languageEnglish
Article numbere72
JournalTranslational psychiatry
Volume2
DOIs
Publication statusPublished - Feb 7 2012
Externally publishedYes

Keywords

  • dentate gyrus
  • hippocampus
  • latent precursors
  • long-term potentiation
  • neurogenesis
  • proliferation

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Cellular and Molecular Neuroscience
  • Biological Psychiatry

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