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Changes in fatty acid composition of cardiac mitochondrial phospholipids in rats fed rapeseed oil
Author(s) -
Dewailly P.,
Nouvelot A.,
Sezille G.,
Fruchart J. C.,
Jaillard J.
Publication year - 1978
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533676
Subject(s) - erucic acid , rapeseed , cardiolipin , phosphatidylethanolamine , phosphatidylcholine , biochemistry , clinical chemistry , fatty acid , food science , chemistry , linolenic acid , composition (language) , lipidology , phospholipid , linoleic acid , linguistics , philosophy , membrane
Male Wistar rats were fed rapeseed oil containing high or low levels or erucic acid for 20 weeks, and changes in the fatty acid composition of cardiac mitochondrial phospholipids were studied. Treatment with rapeseed oil containing 46.2% erucic acid showed incorporation of 22∶1 (5.6%) into isolated cardiolipin from heart mitochondria. After high or low (3.7%) erucic rapeseed oil feeding, linoleic acid was slightly incorporated into cardiolipin. Moreover, both of these rapeseed oils induced a significant increase of linoleate‐arachidonate ratio in phosphatidylethanolamine and phosphatidylcholine. This ratio was also significantly increased in fatty acids esterified to the β‐position of these phospholipids. On the basis of such results, we have to consider the role of linolenic acid which is present at a high level in the different rapeseed oils used, as a possible inhibitor of heart microsomal enzymes involved in linoleate arachidonate conversion. Such alterations might account for mitochondrial fragility and myocardial lesions obtained in long term rapeseed oil feeding experiments.