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Effects of CCK antagonists on GABA mechanism-induced antinociception in the formalin test.

Authors
  • Rezayat, M
  • Tabarrai, E
  • Parvini, S
  • Zarrindast, M R
  • Pirali, M
Type
Published Article
Journal
European Neuropsychopharmacology
Publisher
Elsevier
Publication Date
Jan 01, 1999
Volume
9
Issue
1-2
Pages
9–14
Identifiers
PMID: 10082222
Source
Medline
License
Unknown

Abstract

In this work, the influences of CCK receptor antagonists on antinociception induced by the GABA receptor agonist, baclofen, and the GABA uptake inhibitor, THPO, in the formalin test have been studied. GABA-B agonist baclofen (0.75, 1.25 and 2.5 mg/kg), THPO, a GABA uptake inhibitor (1 and 2 mg/kg) and morphine (1.5, 3 and 6 mg/kg) induced antinociception in both phases of the formalin test in mice. The selective CCK receptor antagonists, L-365,260, MK-329 (0.05, 0.125 and 0.25 mg/kg) and non-selective CCK receptor antagonist, proglumide (2.5, 5, 10 and 20 mg/kg) induced antinociception only in high doses. The CCK receptor antagonists potentiated baclofen (0.75, 1.25 and 2.5 mg/kg) or THPO (1 and 2 mg/kg) responses. It may be concluded that the CCK receptor mechanism may interact with GABA-function in its antinociceptive effect.

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