加工油脂のコレステロール代謝に及ぼす影響 (第6報)

DOI DOI DOI DOI Web Site ほか6件をすべて表示 一部だけ表示 参考文献15件 オープンアクセス

書誌事項

タイトル別名
  • Effect of Processed Oils and Fats on Cholesterol Metabolism. VI
  • カコウ ユシ ノ コレステロール タイシャ ニ オヨボス エイキョウ 7 パー
  • カコウ ユシ ノ コレステロール タイシャ ニ オヨボス エイキョウ 6 ギュ
  • カコウ ユシ ノ コレステロール タイシャ ニ オヨボス エイキョウ 1 パー
  • Effects of Beef Tallow, Its Randomized Fat and Their Blends with Palm Olein
  • 牛脂とそのエステル交換油及び, それらのパームオレインとの混合油の影響

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説明

Six groups of weanling male rats were fed diets containing 20 % (by weight) beef tallow, its randomized fat or their equal weight blends with palm olein, palm olein or soybean oil, as the control, for 28 d. Comparative studies were made on serum lipids, cholesterol and its metabolites in tissues and feces from the rats. The physical and chemical properties of dietary fats were also examined.<BR>1) Beef tallow contained not only POO and SOP, as major components, but also saturated triacylglycerols, as minor components having high melting points. Compared with palm olein, beef tallow showed less SFC at 5°C and more SFC at 10°C or higher temperature, Since, less monounsaturated-disaturated acylglycerols (AG) but more trisaturated AG, as minor components having the highest melting point were present. Randomizing the tallow resulted in more SFC in a temperature region lower than 35°C, due to decreasing in monosaturated-diunsaturated AG and replacing unsaturated fatty acid bound at 2-position with saturated fatty acid bound at 1 or 3-positions in monounsaturated-disaturated AG. By blending with palm olein, SFC of beef tallow or its randomized fat became lower at any temperature, possibly due to decrease in trisaturated AG and increase, in low melting point components including linoleoyl AG.<BR>2) Cholesterol content in serum (total and HDL), liver, heart and adipose tissue was basically the same among all 6 groups including the control (soybean oil) group. The analytical results on fatty acids in fecal lipids suggested the rats in the beef tallow group to preferentially excret the saturated fatty acids, rich in dietary fat, into the feces. The same was noted for palmitic acid in the palm olein group. Preferential excretion was observed in other groups except the control. The proportion of arachidonic acid in liver lipids was essentially the same for all 6 groups.<BR>3) In feces, cholesterol content was basically the same among all groups, except the control (soybean oil). Coprostanol and lathosterol content was higher in the 2 blend groups of beef tallow or its randomized fat with palm olein than in other groups except the control.<BR>The same was noted for bile acids. The ratio of total metabolites/cholesterol was almost equal in all groups, although cholesterol content and that of its metabolites in the control were significantly higher than in the other 5 groups.<BR>4) From these results, the effects of beef tallow, its randomized fat and their blends with palm olein on cholesterol metabolism are shown equivalent to those of palm olein and may be virtually the same as those of soybean oil.

収録刊行物

  • 油化学

    油化学 43 (1), 44-50, 1994

    公益社団法人 日本油化学会

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