N-methyl-d-aspartic acid (NMDA) receptor antagonist MK-801 blocks non-opioid stress-induced analgesia. I. Comparison of opiate receptor-deficient and opiate receptor-rich strains of mice

Przemyslaw Marek, Gayle G. Page, Shamgar Ben-Eliyahu, John C. Liebeskind

Research output: Contribution to journalArticle

Abstract

The effects of the specific N-methyl-d-aspartic acid (NMDA) receptor antagonist MK-801 (0.075 mg/kg), and the specific opiate receptor antagonist naloxone (10 mg/kg), on swim stress-induced analgesia (SSIA) were studied in opiate receptor-deficient (CXBK) and opiate receptor-rich (CXBH) mice. Animals were subjected to forced swimming, and analgesia was assessed using the hot-plate test. In CXBK mice SSIA was blocked by MK-801 but was completely insensitive to naloxone. In CXBH mice SSIA was partially attenuated both by naloxone and MK-801, and it was nearly abolished by a combination of these drugs. Morphine analgesia (10 mg/kg) was abolished by naloxone but completely unaffected by MK-801 in CXBH mice. These findings suggest that the NMDA receptor is critically involved in the non-opioid component of SSIA.

Original languageEnglish (US)
Pages (from-to)293-296
Number of pages4
JournalBrain research
Volume551
Issue number1-2
DOIs
StatePublished - Jun 14 1991
Externally publishedYes

Keywords

  • Excitatory amino acid
  • MK-801
  • N-Methyl-d-aspartate
  • Naloxone
  • Stress-induced analgesia

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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