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Alterations in 5-HT1B receptor function by p11 in depression-like states.

The pathophysiology of depression remains enigmatic, although abnormalities in serotonin signaling have been implicated. We have found that the serotonin 1B receptor [5-hydroxytryptamine (5-HT1B) receptor] interacts with p11. p11 increases localization of 5-HT1B receptors at the cell surface. p11 is increased in rodent brains by antidepressants or electroconvulsive therapy, but decreased in an animal model of depression and in brain tissue from depressed patients. Overexpression of p11 increases 5-HT1B receptor function in cells and recapitulates certain behaviors seen after antidepressant treatment in mice. p11 knockout mice exhibit a depression-like phenotype and have reduced responsiveness to 5-HT1B receptor agonists and reduced behavioral reactions to an antidepressant.

Pubmed ID: 16400147


  • Svenningsson P
  • Chergui K
  • Rachleff I
  • Flajolet M
  • Zhang X
  • El Yacoubi M
  • Vaugeois JM
  • Nomikos GG
  • Greengard P


Science (New York, N.Y.)

Publication Data

January 6, 2006

Associated Grants

  • Agency: NIDA NIH HHS, Id: DA10044
  • Agency: NIMH NIH HHS, Id: MH40899

Mesh Terms

  • Adult
  • Aged
  • Animals
  • Annexin A2
  • Antidepressive Agents
  • Behavior, Animal
  • Brain
  • Cell Membrane
  • Depression
  • Electroconvulsive Therapy
  • Female
  • Humans
  • Male
  • Mice
  • Mice, Knockout
  • Mice, Transgenic
  • Middle Aged
  • Neurons
  • Rats
  • Receptor, Serotonin, 5-HT1B
  • S100 Proteins
  • Serotonin
  • Signal Transduction
  • Two-Hybrid System Techniques