High-cholesterol Diets Induce Changes in Lipid Composition of Rat Erythrocyte Membrane Including Decrease in Cholesterol, Increase in .ALPHA.-Tocopherol and Changes in Fatty Acids of Phospholipids

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  • MAWATARI Shiro
    <i>Department of Nutrition and Health Science, Faculty of Human Environmental Science, Fukuoka Women's University</i>
  • OHNISHI Yasushi
    <i>First Department of Internal Medicine, Faculty of Medicine, Kyushu University</i>
  • KAJI Yoshikazu
    <i>First Department of Internal Medicine, Faculty of Medicine, Kyushu University</i>
  • MARUYAMA Tohru
    <i>The Institute of Rheological Functions of Food Co., Ltd.</i>
  • MURAKAMI Kaori
    <i>Department of Nutrition and Health Science, Faculty of Human Environmental Science, Fukuoka Women's University</i>
  • TSUTSUI Koichiro
    <i>The Institute of Rheological Functions of Food Co., Ltd.</i>
  • FUJINO Takehiko
    <i>The Institute of Rheological Functions of Food Co., Ltd.</i>

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  • High-cholesterol Diets Induce Changes in Lipid Composition of Rat Erythrocyte Membrane Including Decrease in Cholesterol, Increase in α-Tocopherol and Changes in Fatty Acids of Phospholipids
  • High cholesterol Diets Induce Changes in Lipid Composition of Rat Erythrocyte Membrane Including Decrease in Cholesterol Increase in アルファ Tocopherol and Changes in Fatty Acids of Phospholipids

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Effects of high dietary cholesterol on erythrocyte membrane lipids were studied. Feeding rats with a diet containing 0.5% cholesterol and 0.15% sodium cholate for two weeks induced changes in erythrocyte membrane lipids including a decrease in cholesterol, an increase in α-tocopherol (α-Toc) and changes in the fatty acid composition of phospholipids. Oleic acid and linoleic acid increased, while arachidonic acid decreased in phosphatidylcholine. Saturated fatty acids decreased and unsaturated fatty acids increased in phosphatidylethanolamine. Almost the same changes in membrane lipids were also noted after six weeks of feeding rats with the diet. A diet containing 0.5% cholesterol but without sodium cholate caused a decrease in erythrocyte cholesterol and an increase in erythrocyte α-Toc after two weeks of feeding, as compared to the basal diet, indicating that high dietary cholesterol, but not sodium cholate, was responsible for these changes in the erythrocyte membrane.<br>

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