Abstract Title:

Antagonism of antinociception in mice by glucose and fructose: comparison of subcutaneous and intrathecal morphine.

Abstract Source:

Eur J Pharmacol. 1988 Feb 9 ;146(2-3):337-40. PMID: 3371404

Abstract Author(s):

F Lux, D A Brase, W L Dewey

Article Affiliation:

Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0001.

Abstract:

Determination of the ED50s of glucose and fructose, administered i.p., for antagonizing the antinociceptive action of morphine (4 mg/kg s.c. or 0.5 micrograms i.t.) and determination of the ED50s for i.t. morphine after i.p. pretreatment with saline, glucose (5 g/kg) or fructose (5 g/kg) in the mouse tail-flick test indicated that fructose was more potent than glucose in antagonizing antinociception after either route or morphine administration. It is concluded that the antagonism of morphine-induced antinociception by glucose and fructose is due to a direct effect of these sugars or their metabolic products within the central nervous system.

Study Type : Animal Study

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