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Prospective Selective Mechanism of Emerging Senolytic Agents Derived from Flavonoids
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-10-18 , DOI: 10.1021/acs.jafc.1c04379
Yijun Wang 1 , Yufeng He 1 , Margaret P Rayman 2 , Jinsong Zhang 1
Affiliation  

Senescent cells (SCs) are associated with the onset and development of multiple chronic diseases. Selective clearance of SCs by senolytic drugs is a potential therapeutic option for a number of age-related diseases. Among senolytic candidates, only dasatinib with quercetin and fisetin meet the rigorous criteria for senolytic drugs, according to a modified version of Koch’s postulates. It is astonishing that two of the three agents, i.e., quercetin and fisetin, are flavonoids, although the mechanism by which they preferentially eliminate SCs is unclear. Herein, we propose a possible selective mechanism; prooxidant activities of quercetin or fisetin are inevitably involved in killing apoptosis-resistant SCs. Among the dietary flavonoids, quercetin is a potent redox-active flavonoid with strong prooxidant activities, and transition metals, such as copper and iron, hugely amplify its prooxidant activities. Fisetin, which has higher senolytic activities than quercetin, has higher prooxidant effects than quercetin in the absence or presence of copper. It appears that the prooxidant activity of flavonoids is an important consideration for screening senolytics. SCs accumulate high levels of copper and iron, and the selective mechanism of quercetin or fisetin is probably associated with copper/iron-promoted oxidative damage in SCs. Copper and iron dramatically enhanced the prooxidant effects of the flavonoid, epigallocatechin-3-gallate, having shown a depletion effect on SCs in rats and high therapeutic efficacy in patients with idiopathic pulmonary fibrosis, largely caused by SCs. Further investigation to evaluate whether epigallocatechin-3-gallate is a senolytic drug, according to Koch’s postulates, is warranted.

中文翻译:

来自类黄酮的新兴衰老清除剂的前瞻性选择机制

衰老细胞(SCs)与多种慢性疾病的发生和发展有关。通过衰老药物选择性清除 SCs 是许多与年龄相关的疾病的潜在治疗选择。根据 Koch 假设的修改版本,在抗衰老候选药物中,只有含有槲皮素和非瑟酮的达沙替尼符合抗衰老药物的严格标准。令人惊讶的是,三种药剂中的两种,即槲皮素和漆黄素,是类黄酮,尽管它们优先消除 SCs 的机制尚不清楚。在此,我们提出了一种可能的选择机制;槲皮素或漆黄素的促氧化活性不可避免地参与杀死抗凋亡的 SCs。在膳食黄酮类化合物中,槲皮素是一种强效氧化还原活性黄酮类化合物,具有很强的促氧化活性,以及​​过渡金属、如铜和铁,极大地增强了其促氧化活性。鱼黄素具有比槲皮素更高的衰老活性,在铜不存在或存在的情况下比槲皮素具有更高的促氧化作用。似乎黄酮类化合物的促氧化活性是筛选 senolytics 的一个重要考虑因素。SCs 积累高水平的铜和铁,槲皮素或漆黄素的选择性机制可能与 SCs 中铜/铁促进的氧化损伤有关。铜和铁显着增强了类黄酮、表没食子儿茶素 3-没食子酸酯的促氧化作用,显示出对大鼠 SCs 的消耗作用和对主要由 SCs 引起的特发性肺纤维化患者的高治疗效果。进一步研究以评估表没食子儿茶素-3-没食子酸酯是否是一种衰老药物,
更新日期:2021-10-27
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