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富含β-胡萝卜素的杜氏盐藻作为大鼠饮食中视黄醇的来源。

The beta-carotene-rich alga Dunaliella bardawil as a source of retinol in a rat diet.

作者信息

Ben-Amotz A, Mokady S, Avron M

机构信息

Israel Oceanographic and Limnological Research, Tel-Shikmona, Haifa, Israel.

出版信息

Br J Nutr. 1988 May;59(3):443-9. doi: 10.1079/bjn19880053.

Abstract
  1. Dunaliella bardawil, a beta-carotene-accumulating alga, has been tested as a source of retinol and beta-carotene in a diet given to rats. The beta-carotene in this alga is composed of about equal amounts of the 9-cis and all-trans isomers. Male weanling rats were fed on a retinol-deficient diet for 60 d. Thereafter, the rats were divided into groups and fed on a diet deficient in retinol or supplemented with retinol, synthetic beta-carotene, dry alga or an algal oil-extract. Following further growth for 7 d, samples were taken for liver analyses of retinol, retinol isomers and beta-carotene. 2. Liver analyses revealed a comparable content of retinol and normal conversion rates in the rats grown on the diets supplemented with synthetic or natural beta-carotene. Rats fed on the alga and the algal-oil-supplemented diets accumulated 9-cis retinol in addition to the all-trans isomer. Rats fed on synthetic beta-carotene, alga and algal oil had a liver retinol: beta-carotene value of about 3:1. 3. These studies demonstrate the possibility of using dried D. bardawil or an oil extract of the alga as a dietary natural beta-carotene supplement which satisfies the total requirement of retinol in rats. 4. Rats fed on alga or on algal oil, accumulated in the liver 9-cis beta-carotene and all-trans beta-carotene in a ratio similar to that present in the alga.
摘要
  1. 巴氏杜氏藻是一种能积累β-胡萝卜素的藻类,已被作为视黄醇和β-胡萝卜素的来源,用于喂养大鼠的饮食中进行测试。这种藻类中的β-胡萝卜素由大约等量的9-顺式异构体和全反式异构体组成。雄性断奶大鼠先在缺乏视黄醇的饮食中喂养60天。此后,将大鼠分成几组,分别喂食缺乏视黄醇的饮食或补充了视黄醇、合成β-胡萝卜素、干藻或藻油提取物的饮食。在进一步生长7天后,采集样本用于肝脏视黄醇、视黄醇异构体和β-胡萝卜素的分析。2. 肝脏分析显示,在补充了合成或天然β-胡萝卜素的饮食中生长的大鼠,其视黄醇含量相当,转化率正常。喂食藻类和补充藻油饮食的大鼠,除了全反式异构体之外,还积累了9-顺式视黄醇。喂食合成β-胡萝卜素、藻类和藻油的大鼠,肝脏视黄醇与β-胡萝卜素的比值约为3:1。3. 这些研究证明了使用干燥的巴氏杜氏藻或其藻油提取物作为饮食中天然β-胡萝卜素补充剂的可能性,这种补充剂能满足大鼠对视黄醇的全部需求。4. 喂食藻类或藻油的大鼠,肝脏中积累的9-顺式β-胡萝卜素和全反式β-胡萝卜素的比例与藻类中的比例相似。

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