Study on Lipids and Fatty Acids of the Plasma and Aortic Walls in Human and Experimental Atherosclerosis

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概要

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• Lipid and fatty acid composition was studied in plasma and aortic tissue of 6 patients dying of various diseases and in rabbits with experimental atherosclerosis. The atherosclerosis was produced by feeding a lanolin-cottonseed oil mixture diet. On 10th week all rabbits were sacrificed and the aorta removed.The extracted lipids were separated into esterified cholesterol, triglyceride and phospholipid fractions by multibore column chromatography on florisil. The fatty acid composition of the separated lipids was analysed by gas-liquid chromatography. Results obtained in the present study were as follows : (1) There were minor differences in the lipid quantity as well as in the percentage distribution in the intima and media. A remarkable increase of total lipid in the plaque was attributed to a corresponding increase in cholesterol and phospholipids. A proportional increase in total cholesterol in the plaque lipid was mainly due to an increase in esterified cholesterol, (2) There were no significant differences in the fatty acid composition of the cholesterol esters and triglyceride of the plasma, intima or plaque. The phospholipid fatty acid composition of the plaque contained a higher proportion of linoleic and a lower proportion of oleic acid than that of the intima, however these differences between plasma and aortic tissues seemed to be very small. The similarity of the fatty acid composition of the plasma and plaque lipids seems to support the proposition that the plaque lipids are derived from the plasma by filtration.(3) In the experimental atherosclerosis, the fatty acid composition of cholesterol esters in the plasma of the rabbits fed with the lanolin-cottonseed oil mixture contained a higher proportion of stearic and oleic and a lower proportion of linoleic and arachidonic acids than did the control plasma. There were no significant differences in the fatty acid composition of the triglyceride and phospholipid fractions of the control and lipemic plasma.(4) The fatty acid composition of the cholesterol esters of the plaquemedia contained a higher proportion of palmitic and oleic and a lower proportion of linoleic acid than that of the intima-media. Similar differences were observed in the triglyceride fatty acid composition, but there was no significant variation in the phospholipid fraction.(5) After the feeding of the lanolin-cottonseed oil mixture, similar changes in the fatty acid composition of the cholesterol esters were observed in the plasma and aortic tissue ; in both cases there was found a low proportion of polyunsaturated and a high proportion of saturated and monoenoic fatty acids. These results in experimental atherosclerosis seemed also to support the theory of filtration of lipids into the aortic tissue from the plasma.

• International Heart Journal刊行会の論文

著者

• MIZUGUCHI Takanobu

  Third Department of Internal Medicine, Kurume University School of Medicine

• MIZUGUCHI Takanobu

  Third Department of Internal Medicine Kurume University, School of Medicine

関連論文

• Population Survey on Cerebrovascular and Cardiovascular Diseases : The Ten Years Experience in the Farming Village of Tanushimaru and the Fishing Village of Ushibuka
• Study on Lipids and Fatty Acids of the Plasma and Aortic Walls in Human and Experimental Atherosclerosis

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