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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cell Biology

Background:

  • Neurogenesis in the dentate gyrus is implicated in schizophrenia pathogenesis.
  • Psychostimulants like PCP, MK-801, and METH induce schizophrenia-like behaviors in animal models.

Purpose of the Study:

  • To investigate the impact of repeated psychostimulant administration on dentate gyrus neurogenesis.
  • To explore potential therapeutic interventions for psychostimulant-induced neurogenesis deficits.

Main Methods:

  • Mice received repeated administration of PCP, MK-801, or METH.
  • Neurogenesis was assessed by labeling newborn cells with bromodeoxyuridine (BrdU) and using immunohistochemistry.
  • Effects of co-administered clozapine, haloperidol, D-serine, and glycine were evaluated.

Main Results:

  • PCP and MK-801 significantly decreased the number of BrdU-labeled cells in the dentate gyrus.
  • Methamphetamine did not affect neurogenesis.
  • Clozapine, D-serine, and glycine, but not haloperidol or L-serine, reversed the PCP-induced decrease in neurogenesis.

Conclusions:

  • Chronic NMDA receptor dysfunction induced by PCP and MK-801 leads to reduced dentate gyrus neurogenesis.
  • NMDA receptor modulation may offer therapeutic strategies for schizophrenia and related disorders.