Fig. 2.

Effects of Y2 receptor antagonist (BIIE 0246) on anorexic responses to gastric infusions of different doses of casein hydrolysate (Tryptone; A and B), a mixture of long-chain triglycerides (Liposyn II; C and D), and maltodextrin (Polycose; E and F). Non-food-deprived rats (n = 12–16) received a 3.75-h iv infusion of Y2 antagonist (3,000 pmol · kg⁻¹ · min⁻¹) or vehicle beginning 30 min before receiving a 2-h gastric infusion of macronutrient, which began 15 min before dark onset. Food intake was measured during the first 4 h after dark onset. Values are means ± SE. Treatment means labeled with the same letter are not statistically different (P < 0.05).