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Journal of Nutrition Vol. 101 No. 10 October 1971, pp. 1415-1421
Copyright © 1971 by American Society for Nutrition
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Fat Utilization and Lipogenesis in the Young Pig1

G. L. Allee2, D. H. Baker and G. A. Leveille

Department of Animal Science, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

The effect of dietary fat on weight gain and energy efficiency as well as on adipose tissue lipogenesis and the activity of related enzymes was evaluated in the young pig. By the use of diet formulation methods that maintained a constant ratio of each nutrient in the diet to the concentration of metabolizable energy, it was demonstrated in three experiments that the young pig was capable of utilizing fat calories as effectively as carbohydrate calories. Lipogenesis, as measured by the incorporation of glucose-U-14C into fatty acids in adipose tissue slices, was markedly depressed as the level of dietary fat increased. Glucose-U-14C conversion to glyceride-glycerol and 14CO2 was also reduced as dietary fat level increased. The specific activity of malic enzyme and citrate cleavage enzyme paralleled the lipogenesis response. Elevated plasma free fatty acid and cholesterol levels were observed in pigs fed diets containing 13% corn oil compared with those fed diets with 1% corn oil.

1 Supported in part by the National Heart and Lung Institute Grant no. 13245 and by grants-in-aid from Eli Lilly and Company, Greenfield, Indiana and from the Moorman Manufacturing Company, Quincy, Illinois.

2 Present address: Department of Animal Science and Industry, Kansas State University, Manhattan, Kansas 66502.

Manuscript received 4 January 1971.




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