Journal of Applied Physiology Millar Instruments
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J Appl Physiol 38: 513-516, 1975;
8750-7587/75 $5.00
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Journal of Applied Physiology, Vol 38, Issue 3 513-516, Copyright © 1975 by American Physiological Society

ARTICLES

Influence of starvation on the lung: effect on glucose and palmitate utilization

R. A. Rhoades

The relative utilization of [U-14C]glucose and [1-14C]palmitate was examined in lung slices of male Long Evans hooded rats fed ad libitum and starved for 72 h. Food deprivation (72-h fast) significantly decreased [U-14C]flucose oxidation and incorporation into lung lipids. Glucose incorporation into phospholipid-fatty acid (53%) was, in proportion, more markedly reduced than into phospholipid-gluceride glycerol (33%), suggesting that glucose was being conserved for the formation of alpha-glycerol phosphate. (1-14C) palmitate utilization following fasting showed a significant 40% increase in oxidation, and a significant 16% increase in phospholipids, indicating preferential utilization of fatty acids over glucose. Phospholipid fatty acid composition, surface tension measurements and volume-pressure curves were not affected by fasting. Khe data indicate that glucose and palmitate metabolism are interrelated, and that the relative utilization of these substrates is changed to maintain essential lung lipids during an altered physiologic state.


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[Abstract] [Full Text] [PDF]


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