儿茶素和硒的形态-它们是如何相互作用的。

Catechins and Selenium Species-How They React with Each Other.

机构信息

Heavy Ion Laboratory, University of Warsaw, Pasteur Str. 5A, 02-093 Warsaw, Poland.

Faculty of Chemistry, University of Warsaw, Pasteur Str. 1, 02-093 Warsaw, Poland.

出版信息

Molecules. 2023 Aug 5;28(15):5897. doi: 10.3390/molecules28155897.

The combination of selenium and tea infusion, both with antioxidant properties, has potentially complementary mechanisms of action. Se-enriched tea has been considered as a possible Se supplement and a functional beverage to reduce the health risk of Se deficiency. This work investigated the interactions between plant catechins present in tea infusions and selenium species based on changes in the concentration of both reagents, their stability in aqueous solutions, and the possibilities of selenonanoparticles (SeNPs) formation. Selenium species exhibited instability both alone in their standard solutions and in the presence of studied catechins; selenocystine appeared as the most unstable. The recorded UV-Vis absorption spectra indicated the formation of SeNPs in the binary mixtures of catechins and selenite. SeNPs have also formed with diameters smaller than 100 nm when selenite and selenomethionine were added to tea infusions. This is an advantage from the point of view of potential medical applications.

硒和茶浸提物的组合都具有抗氧化特性，具有潜在的互补作用机制。富硒茶被认为是一种可能的硒补充剂和功能性饮料，可以降低硒缺乏的健康风险。这项工作研究了茶浸提物中存在的植物儿茶素与硒物种之间的相互作用，基于两种试剂浓度的变化、它们在水溶液中的稳定性以及形成硒纳米颗粒（SeNPs）的可能性。硒物种在其标准溶液中和在研究的儿茶素存在下均不稳定；硒代半胱氨酸表现出最不稳定。记录的紫外可见吸收光谱表明，在儿茶素和亚硒酸盐的二元混合物中形成了 SeNPs。当亚硒酸盐和硒蛋氨酸添加到茶浸提物中时，也形成了直径小于 100nm 的 SeNPs。从潜在的医学应用的角度来看，这是一个优势。