Krinsky N I, Russett M D, Handelman G J, Snodderly D M
Department of Biochemistry, Tufts University School of Medicine, Boston, MA 02111.
J Nutr. 1990 Dec;120(12):1654-62. doi: 10.1093/jn/120.12.1654.
We have quantitatively analyzed human plasma for the following carotenoids: all-trans-lutein, all-trans-zeaxanthin, alpha-cryptoxanthin, beta-cryptoxanthin, the sum of all-trans-lycopene and its cis isomers, alpha-carotene and beta-carotene. In addition, we have tentatively identified and quantified 13-cis-lutein and 13-cis-zeaxanthin in human plasma. The latter two cis isomers are also apparent in samples of two common food items, spinach and corn meal. We have analyzed the ratios of all of the members of the beta, beta family of carotenoids (zeaxanthin, beta-cryptoxanthin and beta-carotene) to their corresponding beta, epsilon structural isomers (lutein, alpha-cryptoxanthin and alpha-carotene) in human plasma. There are marked differences in these ratios, with beta-carotene and beta-cryptoxanthin predominating in the carotene and monohydroxy-xanthophyll classes and lutein predominating in the dihydroxy-xanthophyll class. These differences could be attributable to dietary intake or to specific mechanisms in the way humans absorb and utilize these compounds.
全反式叶黄素、全反式玉米黄质、α-隐黄质、β-隐黄质、全反式番茄红素及其顺式异构体的总和、α-胡萝卜素和β-胡萝卜素。此外，我们还初步鉴定并定量了人血浆中的13-顺式叶黄素和13-顺式玉米黄质。后两种顺式异构体在两种常见食品菠菜和玉米粉的样本中也很明显。我们分析了人血浆中类胡萝卜素β,β家族（玉米黄质、β-隐黄质和β-胡萝卜素）的所有成员与其相应的β,ε结构异构体（叶黄素、α-隐黄质和α-胡萝卜素）的比例。这些比例存在显著差异，在胡萝卜素和单羟基叶黄素类别中，β-胡萝卜素和β-隐黄质占主导，而在二羟基叶黄素类别中，叶黄素占主导。这些差异可能归因于饮食摄入或人类吸收和利用这些化合物的特定机制。
