J. Lipid Res.
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Journal of Lipid Research, Vol. 13, 483-490, July 1972
Copyright © 1972 by Lipid Research, Inc.

Plasma free fatty acid transport during prolonged glucose consumption and its relationship to plasma triglyceride fatty acids in man

Philip J. Barter and Paul J. Nestel

Department of Clinical Science, The John Curtin School of Medical Research, The Australian National University, Canberra, A.C.T., Australia, 2601

Plasma free fatty acid (FFA) transport in human subjects has been studied during the course of prolonged ingestion of different amounts of glucose. Compared with the fasting state, hypocaloric glucose intake resulted in marked suppression of net transport of FFA with no change in (fractional) turnover rate. There was no further suppression of net transport of FFA when the intake was increased to isocaloric or hypercaloric levels, but there was a significant increase in the (fractional) turnover rate, indicating an enhancement of clearance mechanisms. During the 20-24-hr period of fasting after isocaloric glucose consumption, the (fractional) turnover rate quickly fell to that found in the fasting individual, whereas net transport remained suppressed for much longer. This suggested that ingestion of glucose maintains an influence on lipolysis longer than on esterification. During this period of fasting after glucose administration, the contribution of plasma FFA to circulating triglyceride fatty acids increased with time and was positively and significantly correlated with the changes in the net transport of plasma FFA.

Supplementary key words caloric intake • net transport • precursors of plasma triglyceride fatty acids

Submitted on November 29, 1971
Accepted on March 23, 1972


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[Abstract] [Full Text] [PDF]


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