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δ-生育酚在小鼠的脂肪组织中略有蓄积。

δ-Tocopherol Slightly Accumulates in the Adipose Tissue of Mice.

机构信息

Department of Nutrition and Life Science, Kanagawa Institute of Technology.

Department of Pharmacology, National Center for Child Health and Development.

出版信息

J Oleo Sci. 2021 Feb 1;70(2):247-252. doi: 10.5650/jos.ess20254. Epub 2021 Jan 15.

Abstract

This study aimed to compare the distribution of vitamin E analogs, particularly α-tocopherol and δ-tocopherol, in mice fed with a normal diet and a high-fat and high-sucrose diet separately. We used male C57BL/6JJcl strain mice, which were divided into six groups (control [C], Cα, Cδ, high-fat and high-sucrose [H], Hα, and Hδ groups) and bred for 4 weeks. The additional quantity of α-tocopherol or E-mix D (containing 86.7% δ-tocopherol) into diet was 800 mg/kg diet. The final body weight was significantly higher in the H group than in the C group. However, the effects of vitamin E analog intake had no significant difference, with no synergy between vitamin E and diet. Similar results were obtained in epididymal fat weight. Moreover, α-tocopherol was mainly distributed in the liver in both the Cα group and Hα group, whereas δ-tocopherol mostly accumulated in the epididymal fat, in both the Cδ group and Hδ group. Also, δ-tocopherol was detected in all tissues in both groups. Both the α-tocopherol and δ-tocopherol levels in the epididymal fat were significantly lower in the H group than in the C group. In conclusion, our results suggest that a portion of δ-tocopherol was incorporated into the adipose tissue by chylomicron before arriving at the liver, and then it is metabolized in the liver.

摘要

本研究旨在比较正常饮食和高脂肪高蔗糖饮食喂养的小鼠中维生素 E 类似物(特别是α-生育酚和δ-生育酚)的分布。我们使用雄性 C57BL/6JJcl 品系小鼠,将其分为六组(对照组[C]、Cα、Cδ、高脂肪高蔗糖组[H]、Hα 和 Hδ 组),并繁殖 4 周。饮食中额外添加的α-生育酚或 E-混合 D(含有 86.7%δ-生育酚)的量为 800mg/kg 饮食。H 组的最终体重明显高于 C 组。然而,维生素 E 类似物摄入的影响没有显著差异,维生素 E 与饮食之间没有协同作用。附睾脂肪重量也得到了类似的结果。此外,α-生育酚主要分布在 Cα 组和 Hα 组的肝脏中,而 δ-生育酚主要积聚在 Cδ 组和 Hδ 组的附睾脂肪中。此外,两组均检测到 δ-生育酚存在于所有组织中。H 组附睾脂肪中的α-生育酚和 δ-生育酚水平均明显低于 C 组。综上所述,我们的结果表明,一部分 δ-生育酚在到达肝脏之前通过乳糜微粒被纳入脂肪组织,然后在肝脏中被代谢。

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