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Journal of Nutrition Vol. 107 No. 7 July 1977, pp. 1263-1268
Copyright © 1977 by American Society for Nutrition
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Influence of Dietary Fat on Fatty Livers of Choline-Deficient Rats1

Catherine Carroll and Louise Williams

Home Economics Department, Agricultural Experiment Station, University of Arkansas, Fayetteville, Arkansas 72701

Our purpose was to evaluate the influence of type of dietary fat on nature and severity of liver lipid changes induced in male, weanling rats by low choline diets. Beef tallow, a blend of tallow and safflower oil, or safflower oil (SO) each provided 48% of total energy value of a control diet and a low choline diet. Livers from choline-deficient rats fed tallow, blend, or SO diets contained approximately 4.5, 5, and 2.5 times as much lipid, respectively, as livers from corresponding control groups. Liver lipids from rats fed SO diets as compared with those from rats fed tallow diets contained lower percentages of saturated and monounsaturated fatty acids, and higher percentages of polyunsaturated fatty acids. Values for groups fed blend diets were intermediate, except for 18:0 and 20:4 in the control group. Choline deficiency resulted in significant increases in proportions of the predominant fatty acid(s) of the dietary fat in liver lipids (but not in fat pad lipids) at the expense of 18:0 and 20:4. Ratios of 16:0 to 18:0 in both liver and fat pad lipids were greater in choline-deficient than in corresponding control groups, probably reflecting greater fatty acid synthesis.

KEY WORDS: • choline deficiency • fatty livers • dietary fat

1 Published with the approval of the Director of the Arkansas Agricultural Experiment Station.

Manuscript received 19 September 1975.




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