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Wnt2 expression and signaling is increased by different classes of antidepressant treatments

Hideki Okamoto1, Bhavya Voleti, Mounira Banasr

  • 1Connecticut Mental Health Center, Yale University School of Medicine, New Haven, USA.

Biological Psychiatry
|June 24, 2010
PubMed
Abstract

Insights

Antidepressants target Wnt2 signaling, a pathway regulating glycogen synthase kinase-3beta (GSK-3beta). Increased Wnt2 expression in the brain shows antidepressant effects, offering new therapeutic avenues for mood disorders.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pharmacology

Background:

  • Glycogen synthase kinase-3beta (GSK-3beta) is a target for mood disorder treatments.
  • Limited research exists on upstream regulators and downstream targets of GSK-3beta in mood disorders.

Purpose of the Study:

  • To investigate the influence of antidepressants on Wnt signaling pathways regulating GSK-3beta.
  • To identify upstream signaling molecules and downstream targets affected by antidepressants.

Main Methods:

  • Focused microarray analysis to examine antidepressant effects on Wnt signaling and transcription factors.
  • Secondary measures to confirm Wnt2 expression and function.
  • Viral vector approach to assess the impact of increased Wnt2 expression in the hippocampus.

Main Results:

  • Wnt2 was identified as a common target for various antidepressant classes.
  • Differential regulation of Wnt-GSK-3beta signaling genes by antidepressants was observed.
  • Increased Wnt2 expression in the hippocampus demonstrated antidepressant-like behavioral effects in depression models.

Conclusions:

  • Wnt2 expression and signaling are common targets of antidepressant action.
  • Elevated Wnt2 levels are sufficient to produce antidepressant effects, suggesting a novel therapeutic mechanism.

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