Abstract
Di-2-ethylhexyl phthalate (DEHP) is known to be widely distributed in the food chain, and previous studies have identified DEHP as a constituent of heart muscle mitochondrial lipids. The present paper describes an interaction between dietary DEHP and fat on gain in body weight and on the organ weights and lipid content of liver, heart and kidney in rats. Groups of rats were fed a basal fat-free diet supple mented with either 0.1% DEHP or 4% stripped lard or both for a period of 44 days. Dietary DEHP caused an increase in liver weight irrespective of the fat content in the diet. Although, in the absence of dietary fat, DEHP did not significantly change the body weight and the weight of the epididymal fat pad, with the addition of dietary fat, DEHP potentiated the growth-promoting effect of the fat itself, indicating the existence of an interaction between the two dietary constituents. Among the three organs examined for DEHP content, the liver was the only tissue in which DEHP failed to accumulate as a result of dietary supplementation with this substance. Furthermore, dietary fat and DEHP acted synergistically in increasing the total lipid content of the liver. These observations strongly suggest the existence of an interaction between dietary DEHP and fat on lipid metabolism. J. Nutr. 104: 187-191, 1974.
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