Abstract
We examined the influence of diets supplemented with fish and vegetable oils on fatty acid and prostaglandin E 2 (PGE 2) contents in livers of non-7,12-dimethylbenz[ a]anthracene (DMBA)- and DMBA-treated rats, and in DMBA-induced tumours. Decreased concentrations of saturated fatty acids and increased unsaturated fatty acid levels were observed in liver phospholipids of rats fed these oils. There was a marked difference in the concentrations of fatty acids found in the tumours and those present in liver lipids. Oleic acid was the main unsaturated fatty acid found in the tumour tissue. Both liver and tumour PGE 2 contents were clearly correlated to the diet. The PGE 2 concentrations were decreased in livers and tumours of rats fed fish (FO) and linseed oils (LO).
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