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Cholesterol and fatty acid synthesis in swine

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Lipids

Abstract

In incubation studies with swine tissue slices, acetate-1-14C or glucose-U-14C as substrates were incorporated more readily into fatty acids and cholesterol in adipose tissue than other tissues tested. Cholesterol and fatty acid synthesizing activity was substantial in the small intestine. When acetate was available, liver, small intestine, and adipose tissue were important sites for cholesterol synthesis. Heart and aortic tissue had marginal levels of cholesterol synthesizing ability. Lipogenesis in adult swine liver, heart, and aortic tissue was extremely low. As in tissue slices, incorporation of acetyl-1-14C CoA into fatty acids by adipose homogenates indicated high lipogenic activity. Subcellular fractionations of heart and aortic tissue indicated that the heart microsomal fraction had the highest lipogenic activity as measured by the incorporation of acetyl-1-14C CoA into fatty acids. In adult swine adipose tissue, the incorporation of glucose-U-14C into fatty acid was higher than its incorporation into glyceride-glycerol. The synthesis of glyceride-glycerol from glucose-U-14C or acetate-1-14C in liver was higher than for fatty acid synthesis. The activity of acetyl CoA carboxylase, fatty acid synthetase, citrate cleavage enzyme, nicotinamide adenine dinucleotide phosphate-malate dehydrogenase, glucose-6-phosphate dehydrogenase, and 6-phosphogluconate dehydrogenase was considerably higher in adipose tissue than in other tissues tested, paralleling its high lipogenic capacity.

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Authors and Affiliations

  1. The Burnsides Research Laboratory, University of Illinois, 61801, Urbana, Illinois

    William Y. Huang & Fred A. Kummerow

  2. The Harlan E. Moore Heart Research Foundation, 61820, Champaign, Illinois

    William Y. Huang & Fred A. Kummerow

Authors
  1. William Y. Huang
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  2. Fred A. Kummerow
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Additional information

A preliminary report of this paper was given at the AOCS 66th Annual Spring Meeting, Dallas, Texas, April 30, 1975, Abstr. No. 109.

In partial fulfillment of the requirement for the PhD degree in Nutritional Sciences at the University of Illinois at Urbana-Champaign.

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Huang, W.Y., Kummerow, F.A. Cholesterol and fatty acid synthesis in swine. Lipids 11, 34–41 (1976). https://doi.org/10.1007/BF02532582

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  • DOI: https://doi.org/10.1007/BF02532582

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