Narcotic antagonists attenuate drinking induced by water deprivation in a primate

David R. Brown, Stephen G. Holtzman

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Pure narcotic antagonists such as naloxone and naltrexone have consistently been shown to attenuate drinking in the rat after periods of water deprivation. One objective of this study was to extend observations to a primate species, the squirrel monkey. Whereas naloxone and naltrexone have a greater relative affinity for opiate receptors preferentially binding morphine and other opiate alkaloids than for those with high affinity for the endogenous opioid peptides, diprenorphine, another pure opiate antagonist, binds with equally high affinity to both receptor subtypes. Therefore, a second objective was to determine the actions of diprenorphine on drinking in water-deprived rats and squirrel monkeys and to compare the effects of this drug to those of naloxone and naltrexone. All three narcotic antagonists suppressed water consumption of monkeys and rats deprived of water for 18 and 24 hr, respectively. Diprenorphine was the most potent compound tested in both species, producing significant reductions in water consumption of monkeys and rats at systemic doses as low as 0.01 and 0.1 mg/kg respectively. Moreover, diprenorphine was the longest acting of the three drugs in the monkey. These results demonstrate that the narcotic antagonists attenuate drinking in primates as well as in rodents and support the hypothesis that these drugs reduce water intake by interrupting the activity of endogenous opioid pathways mediating drinking behavior.

Original languageEnglish (US)
Pages (from-to)1287-1294
Number of pages8
JournalLife Sciences
Volume28
Issue number11
DOIs
StatePublished - Mar 16 1981

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Water Deprivation
Diprenorphine
Narcotic Antagonists
Drinking Water
Primates
Drinking
Naltrexone
Opiate Alkaloids
Naloxone
Water
Rats
Haplorhini
Saimiri
Pharmaceutical Preparations
Drinking Behavior
Opioid Peptides
Opioid Receptors
Morphine
Opioid Analgesics
Rodentia

Cite this

Narcotic antagonists attenuate drinking induced by water deprivation in a primate. / Brown, David R.; Holtzman, Stephen G.

In: Life Sciences, Vol. 28, No. 11, 16.03.1981, p. 1287-1294.

Research output: Contribution to journalArticle

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