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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effects of tifluadom on food consumption compared with chlordiazepoxide and kappa agonists in the rat.

Tifluadom (0.625-10.0 mg kg-1) was administered to non-deprived male rats which had been accustomed to eating a highly palatable diet in a 30 min test period. This compound, an opioid benzodiazepine, produced a significant increase in consumption of food when administered by the subcutaneous route, but not after intraperitoneal injection. Both chlordiazepoxide (1.25-20.0 mg kg-1) and the selective kappa opiate receptor agonist U-50,488 (0.3125-2.5 mg kg-1) also produced significant hyperphagic effects in the same feeding situation. In contrast, the two kappa opiate receptor agonists, ethylketocyclazocine (0.1-3.0 mg kg-1) and bremazocine (0.078-1.25 mg kg-1) brought about a dose-related suppression of food intake. Hence, the effects of kappa opiate receptor agonists in the feeding situation described here were not uniform. Furthermore, tifluadom could be likened either to a benzodiazepine or to a selective kappa receptor agonist. The hyperphagia induced by tifluadom was antagonized by naloxone, suggesting that the effect was mediated by an action at opiate receptors. It was not antagonized however by Ro15-1788 (10.0 and 20.0 mg kg-1), a selective benzodiazepine receptor antagonist, ruling out possible mediation by benzodiazepine receptors. The benzodiazepine receptor antagonist, CGS 8216, exhibited intrinsic activity when administered alone, and significantly reduced food consumption in tifluadom-treated and control animals.[1]


  1. Effects of tifluadom on food consumption compared with chlordiazepoxide and kappa agonists in the rat. Cooper, S.J., Moores, W.R., Jackson, A., Barber, D.J. Neuropharmacology (1985) [Pubmed]
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