In Vitro Evaluation of Pro- and Antioxidant Effects of Flavonoid Tricetin in Comparison to Myricetin.

In Vitro Evaluation of Pro- and Antioxidant Effects of Flavonoid Tricetin in Comparison to Myricetin.
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DOI:
10.3390/molecules25245850
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发表时间:
2020-12-11
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Kubicova L
Kubicova L
中科院分区:
其他
文献类型:
--
作者:
Chobot V;Hadacek F;Bachmann G;Weckwerth W;Kubicova L

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类黄酮是相当常见的植物酚类成分,以有效的抗氧化作用而闻名,对人类健康有益。具有连苯三酚部分的黄酮类化合物是高效还原剂,具有可能的促和抗氧化作用,具体取决于反应环境。因此,通过微分脉冲伏安法和脱氧核糖降解试验研究了杨梅素和三醋素的氧化还原特性。三醋精被证明是一种良好的抗氧化剂,但在脱氧核糖降解测定变体之一中仅显示出可忽略不计的促氧化活性。与三醋素相比,杨梅素显示出促和抗氧化作用。杨梅素更有效的还原特性可能是由环 C 上烯醇 3-羟基的正介观效应引起的。很明显,结构相似的黄酮类化合物的抗氧化特性可以通过相对较小的结构变化(例如羟基化)转化为明显的促氧化作用。由于活性氧(ROS)通常在动物和植物细胞的病理和生理过程中充当第二信使,因此类黄酮的促和抗氧化特性是组织信号级联控制机制的重要组成部分。
Flavonoids are rather common plant phenolic constituents that are known for potent antioxidant effects and can be beneficial for human health. Flavonoids with a pyrogallol moiety are highly efficient reducing agents with possible pro- and antioxidant effects, depending on the reaction milieu. Therefore, the redox properties of myricetin and tricetin were investigated by differential pulse voltammetry and deoxyribose degradation assay. Tricetin proved to be a good antioxidant but only showed negligible pro-oxidant activity in one of the deoxyribose degradation assay variants. Compared to tricetin, myricetin showed pro- and antioxidant effects. The more efficient reducing properties of myricetin are probably caused by the positive mesomeric effect of the enolic 3-hydroxy group on ring C. It is evident that the antioxidant properties of structurally similar flavonoids can be converted to apparent pro-oxidant effects by relatively small structural changes, such as hydroxylation. Since reactive oxygen species (ROS) often serve as secondary messengers in pathological and physiological processes in animal and plant cells, the pro- and antioxidant properties of flavonoids are an important part of controlling mechanisms of tissue signal cascades.
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影响因子: 2.7
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三种精选黄烷类黄酮类化合物的促氧化和抗氧化活性:儿茶素、圣草酚和紫杉叶素。
DOI: 10.3390/ijms17121986
发表时间: 2016-11-26
影响因子: 5.6
作者:
Chobot V;Hadacek F;Bachmann G;Weckwerth W;Kubicova L
通讯作者: Kubicova L