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黄酮类和黄酮醇类的神经保护作用:作用机制及其与黄酮类结构特征的关系

Neuroprotective actions of flavones and flavonols: mechanisms and relationship to flavonoid structural features.

作者信息

Dajas Federico, Andrés Abin-Carriquiry Juan, Florencia Arredondo, Carolina Echeverry, Felicia Rivera-Megret

机构信息

Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable, Avda Italia 3318, 11600, Montevideo, Uruguay.

出版信息

Cent Nerv Syst Agents Med Chem. 2013 Mar;13(1):30-5. doi: 10.2174/1871524911313010005.

Abstract

Epidemiological studies have shown positive preventive action of flavonoids on cardiovascular and neurodegenerative events. Among the six groups in which flavonoids are classified, the flavones and flavonols, based on the backbone of 2-phenylchromen-4-one (2-phenyl-1-benzopyran-4-one) are the most commonly encountered within the families and genera of the higher plants. Numerous studies support a neuroprotective activity of flavones such as luteolin and flavonols such as kaempherol and quercetin in experimental focal ischemia and models of neurodegeneration. Antioxidation, modulation of signaling cascades and gene expression as well as anti-inflammation appear as the main protective mechanisms and mitochondria are a likely main target mediating the preventive actions against oxidative stress. Flavones and flavonols re-establish the redox regulation of proteins, transcription factors and signaling cascades that are otherwise inhibited by elevated oxidative stress. The final survival or death of the neuron depends on flavone and flavonol concentrations, time of exposure and, mainly, metabolic and oxidative neuronal circumstances. Neuroprotection appears to be linked to specific structural motifs, beyond those involved in antioxidation. By themselves or as templates for synthetic compounds, flavone and flavonol molecules show potential as multi-targeted therapeutic tools for protecting the brain. Nonetheless, more research needs to be done on the correlation of potential beneficial effects of flavones and flavonols and their mechanisms of action.

摘要

流行病学研究表明,黄酮类化合物对心血管和神经退行性疾病具有积极的预防作用。在黄酮类化合物分类的六个组中,以2-苯基色原酮(2-苯基-1-苯并吡喃-4-酮)为骨架的黄酮和黄酮醇是高等植物科属中最常见的。大量研究支持黄酮类化合物(如木犀草素)和黄酮醇(如山奈酚和槲皮素)在实验性局灶性缺血和神经退行性疾病模型中的神经保护活性。抗氧化、信号级联和基因表达的调节以及抗炎作用似乎是主要的保护机制,而线粒体可能是介导抗氧化应激预防作用的主要靶点。黄酮和黄酮醇可重新建立蛋白质、转录因子和信号级联的氧化还原调节,否则这些调节会因氧化应激升高而受到抑制。神经元的最终存活或死亡取决于黄酮和黄酮醇的浓度、暴露时间,主要还取决于神经元的代谢和氧化环境。神经保护作用似乎与特定的结构基序有关,超出了抗氧化所涉及的范围。黄酮和黄酮醇分子本身或作为合成化合物的模板,显示出作为保护大脑的多靶点治疗工具的潜力。尽管如此,关于黄酮和黄酮醇的潜在有益作用与其作用机制之间的相关性,仍需要进行更多的研究。

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