Abstract
Considering the changes in the fatty acid profile of liver lipids related to age, gender and nutritional status or occurring in pathological situations, this study aimed at investigating whether such changes could be judged from measurements conducted in plasma lipids. The fatty acid profile of both liver and plasma phospholipids and triglycerides was measured in 16 control animals and 26 rats depleted in long-chain polyunsaturated (n-3) fatty acids. Within each group of rats, significant correlations prevailed between the percentage of each fatty acid in liver versus plasma phospholipids or triglycerides. However, the plasma/liver ratio for the relative content of C20:5(n-3), C22:5(n-3) and C22:6(n-3) in triglycerides displayed abnormally high values in 2 control animals. The fatty acid profile of liver phospholipids and triglycerides can, as a rule, be judged from measurements made in the corresponding plasma lipids. For instance, measurements in plasma phospholipids could help to identify subjects deficient in (n-3) fatty acids and to assess the dietary correction of this defect.
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