8-OH-DPAT induces a selective increase in protein intake in ageing overweight animals.
1994
Abstract We have examined the effects of a 5-HT 1A receptor agonist (8-hydroxy-2-(di- n -propylamino)tetralin, 8-OH-DPAT) on food preference in ageing rats that had been given a ‘palatable’ meal 15 min before administration of the drug. Ageing rats consumed a greater amount of the ‘palatable’ pre-meal than the young rats. In young rats lipids were the predominant source of calories, but in old animals lipid and protein consumption was similar. Administration of 8-OH-DPAT resulted in an increase in total caloric intake in both groups. Concomitant with this there was a significant increase in protein intake in both groups, which was most important in ageing rats, where proteins became the predominant source of calories.
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