Differential expression of VAMP2/synaptobrevin-2 after antidepressant and electroconvulsive treatment in rat frontal cortex

Pharmacogenomics J. 2002;2(6):377-82. doi: 10.1038/sj.tpj.6500135.


The biological basis for the therapeutic mechanisms of depression is still unknown. We have previously performed expressed-sequence tag (EST) analysis to identify some molecular machinery responsible for antidepressant effect. Then, we developed our original cDNA microarray, on which cDNA fragments identified as antidepressant-related genes/ESTs were spotted. In this study, with this microarray followed by Western blot analysis, we have demonstrated the induction of vesicle-associated membrane protein 2(VAMP2/synaptobrevin-2) in rat frontal cortex not only after chronic antidepressant treatment, but also after repeated electroconvulsive treatment. On the other hand, expression of SNAP-25 and syntaxin-1 was not changed by these treatments. These components make a soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptor complex with VAMP2 and mediate the synaptic vesicle docking/fusion machinery. In conclusion, it is suggested that VAMP2/synaptobrevin-2 plays important roles in the antidepressant effects. Our results may contribute to a novel model for the therapeutic mechanism of depression and new molecular targets for the development of therapeutic agents.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antidepressive Agents / pharmacology*
  • Electroconvulsive Therapy / methods*
  • Frontal Lobe / drug effects*
  • Frontal Lobe / metabolism*
  • Gene Expression Regulation / drug effects
  • Gene Expression Regulation / physiology
  • Male
  • Membrane Proteins / biosynthesis*
  • Membrane Proteins / genetics
  • Nerve Tissue Proteins / biosynthesis*
  • Nerve Tissue Proteins / genetics
  • R-SNARE Proteins
  • RNA, Messenger / biosynthesis
  • Rats
  • Rats, Sprague-Dawley


  • Antidepressive Agents
  • Membrane Proteins
  • Nerve Tissue Proteins
  • R-SNARE Proteins
  • RNA, Messenger