The effect of dietary lipids on the trout erythrocyte membrane |
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| Authors: | C Leray G Nonnotte L Nonnotte |
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| Institution: | (1) CNRS, B. P. 20 CR, 67037 Strasbourg-Cédex, France |
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| Abstract: | Rainbow trout were fed either a commercial diet or semi-purified diets containing 8% by weight of either cod liver oil, grape
seed oil or hydrogenated coconut oil. Important changes in the fatty acid composition of erythrocyte membrane phospholipids
were induced by these dietary fats. No changes were seen in the cholesterol/phospholipid ratio and in the cellular ATP level.
Shape changes (crenation of cell margin and shrinkage) were only seen in trout fed hydrogenated coconut oil in connection
with an accumulation of high amounts of (n-9) fatty acids including 20:3 (n-9) phospholipids. The compositional changes affect
the stability of the erythrocyte membrane. An increased rate of osmotic hemolysis appeared to be associated with an increased
unsaturated fatty acid content of the membranes. |
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| Keywords: | rainbow trout erythrocyte osmotic fragility phospholipid fatty acid diet morphology |
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