The effect of gastric loads of sugars and amino acids on milk intake of suckling pigs.
A 3 h fast of suckling pigs less than a week of age decreased plasma glucose (P less than .005), but did not affect plasma protein, osmolality or hematocrit. After fasting, solutions (40 ml/kg body weight) of 5% glucose, 5% fructose, 5% xylose, 5% mannitol, 5% sorbitol, 2.5% leucine, 2.5% phenylalanine (50 ml/kg), .9% NaCl, 5% lactose, 5% sucrose and a 50% egg yolk-distilled water mixture were administered by stomach tube and the piglet then returned to the sow. Weight gain was used as a measure of sow's milk intake. Milk consumption during the first 3 h after fasting was lower (P less than .05) for pigs given glucose than for sham-loaded controls, but no differences were observed between glucose and mannitol or sorbitol for the same period. Mannitol and sorbitol were more effective than NaCl (P less than .01) in lowering consumption for the 3 h after loading. Also during the first hour after loading, xylose caused lower (P less than .001) food intake than glucose. Egg yolk suppressed intake in comparison to sham-loaded controls (P less than .05). D-phenylalanine suppressed intake more than L-phenylalanine (P less than .05), but no differences were observed between the D and L isomers of leucine.
D000596:Amino Acids / Q000008:administration & dosage / Q000378:metabolism*; D000818:Animals; D000833:Animals, Suckling; D001835:Body Weight; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000008:administration & dosage; D004530:Egg Yolk; D005215:Fasting; D005247:Feeding Behavior; D005260:Female; D008297:Male; D008892:Milk; D012527:Satiation; D013552:Swine / Q000502:physiology*
D000596:Amino Acids; D002241:Carbohydrates