The effects of the GABA(B) receptor agonist baclofen were investigated on food intake in non-deprived CFLP and C57BL/6 mice. In Experiment 1, baclofen (1-8 mg /kg) administered i.p. to CFLP mice, produced a dose-related increase in food intake. The 4 and 8 mg/kg doses produced significant increases in cumulative feeding when measure 120 min after administration (at least P < 0.05, in each case). In Experiment 2, baclofen (1-10 mg/kg), administered intraperitoneally (i.p.) to C57BL/6 mice, also produced a dose-related increase in food intake. The 4 mg/kg dose of baclofen significantly increased cumulative food intake at 60 min (P < 0.05), while the 2 and 4 mg/kg doses significantly increased cumulative food intake at 120 min (P < 0.01, in each case). The 10mg/kg dose was without effect. These data show that systemic administration of the GABA(B) agonist baclofen produces an increase in food consumption in two different strains of mice and extend previous observations made in rat to another rodent species.
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