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Abstract
AbstractThe growth of female rats was depressed further by the incorporation of DDT into a ration deficient in essential fatty acids (EFA). With female rats fed a ration supplemented with EFA, DDT produced a slight stimulation in growth. DDT also produced an increase in the 20∶3ω9/20∶4ω6 ratio in liver lipids of male rats fed a ration deficient in EFA. These data indicate an effect in EFA nutrition. Substantial changes in the fatty acid composition of liver lipids resulted from the feeding of DDT. The proportion of 16∶0 was decreased, while that of 18∶0 was increased. With rats on the supplemented rations an increase in the proportion of 20∶4ω6 was observed, while in the deficient rats a comparable increase was observed in the proportion of 20∶3ω9. These changes in fatty acid composition have been related to the proliferation of hepatic smooth endoplasmic reticulum induced by the DDT, and it is suggested that this effect could increase the demand for EFA by the liver, thus influencing EFA nutrition.
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