Reduction in the protein level of c-Jun and phosphorylation of Ser73-c-Jun in rat frontal cortex after repeated MK-801 treatment

Yong Min Ahn, Myoung Suk Seo, Se Hyun Kim, Won Je Jeon, Yeni Kim, Ung Gu Kang, Yong Sung Juhnn, Yong Sik Kim

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Repeated administration of NMDA antagonists can induce behavioral alterations that mimic symptoms of psychosis, as seen in schizophrenia. JNK, one of the MAPKs, and c-Jun, its downstream target molecule, play important roles in regulating apoptosis in neural cells, and have been suggested as being associated with the pathophysiology of psychosis and the mechanism of action of some antipsychotics. We investigated changes in the JNK-c-Jun pathway and other Jun family proteins in the rat frontal cortex after single and repeated administration of MK-801 to examine acute and chronic responses. Neither the protein level nor the phosphorylation of JNK changed after single or repeated doses of MK-801. However, after repeated treatments, but not a single treatment, with MK-801, a down-regulation occurred in the protein level and of Ser73 phosphorylation of c-Jun in the rat frontal cortex. Other members of the Jun family, JunB and JunD, were unchanged. Repeated exposure to MK-801 down-regulated the phosphorylation and protein level of c-Jun in the rat frontal cortex, which may be related to the long-term effects of chronic treatment with MK-801.

Original languageEnglish
Pages (from-to)80-87
Number of pages8
JournalPsychiatry Research
Volume167
Issue number1-2
DOIs
StatePublished - 15 May 2009

Keywords

  • JNK
  • MAPK
  • NMDA receptor antagonist
  • Psychosis
  • Psychotomimetic agent

Fingerprint

Dive into the research topics of 'Reduction in the protein level of c-Jun and phosphorylation of Ser73-c-Jun in rat frontal cortex after repeated MK-801 treatment'. Together they form a unique fingerprint.

Cite this