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  • Title: Synergistic anorectic effect of dehydroepiandrosterone and d-Fenfluramine on the obese Zucker rat.
    Author: Gillen G, Porter JR, Svec F.
    Journal: Physiol Behav; 1999 Aug; 67(2):173-9. PubMed ID: 10477047.
    Abstract:
    Fasted obese, female Zucker rats accustomed to eating a single high fat meal within 1 h a day were treated with intraperitoneal injections of dehydroepiandrosterone (DHEA) and dextrofenfluramine (d-fen), either individually or in combination. Caloric intake was measured over a 1-h period 2 h after drug administration, and results compared to that of vehicle-treated controls. At 50 mg/kg body weight, DHEA did not affect food intake. At doses of < or = 2 mg/kg d-fen did not affect food intake. Together, however, DHEA 50 mg/kg and d-fen < or = 2 mg/kg significantly decreased food intake. At doses of > or = 3 mg/kg d-fen diminished caloric intake by itself, and the addition of DHEA significantly augmented this effect. Neurotransmitter levels in select regions of the hypothalamus of animals treated using a similar drug protocol showed several changes in the levels of serotonin and its metabolite 5 hydroxyindole acetic acid (5-HIAA). It is hypothesized that DHEA augments the production of serotonin while d-fenfluramine enhances its release, and together these two actions may account for the synergistic action of DHEA and d-fenfluramine.
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