首页> 外文期刊>Life sciences >Quercetin and rutin exhibit antiamyloidogenic and fibril-disaggregating effects in vitro and potent antioxidant activity in APPswe cells.
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Quercetin and rutin exhibit antiamyloidogenic and fibril-disaggregating effects in vitro and potent antioxidant activity in APPswe cells.

机译:槲皮素和芦丁在Appswe细胞中表现出体外和有效的抗氧化活性在体外和有效的抗氧化活性的抗氧化和原纤化作用。

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AIMS: Quercetin and rutin have been reported to exert numerous pharmacological activities, such as free-radical scavenging, effects on immune and inflammatory cell functions, and could have benefits in Alzheimer's disease (AD) by mitigating cellular damage induced by reactive oxygen species (ROS). A key event in AD is the conversion of the beta-amyloid (Abeta) peptide into amyloid plaques in the brain. Preventing Abeta aggregation is pursued as a therapeutic strategy for treating AD. In this study, antiamyloidogenic and antioxidant properties of quercetin and rutin were investigated. MAIN METHODS: We investigated whether quercetin and rutin affect Abeta25-35 fibrillogenesis, BACE activity and the cellular redox status. KEY FINDINGS: Quercetin and rutin inhibited the formation of Abeta fibrils and disaggregated Abeta fibrils. beta-secretase enzyme (BACE) activity was significantly inhibited by rutin. To resemble the in vivo Abeta-induced neurotoxicity we used a cell system overexpressing APP Swedish mutation (APPswe), which is associated with early-onset familial AD, and may promote oxidative stress due to the enhanced Abeta production. Quercetin and rutin decreased almost completely ROS generation in H(2)O(2)-treated APPswe cells. Both flavonoids increased intracellular GSH content and the redox status, and for rutin this effect was concentration dependent. Besides, quercetin and rutin diminished the index of lipid peroxidation in comparison with control APPswe cells at all concentrations tested. SIGNIFICANCE: Our findings may provide an explanation of the neuroprotective effect of quercetin and rutin, suggesting that they could be dietary phytochemicals able to revert the beta-amyloid toxicity in vivo.
机译:目的:据报道,槲皮素和芦丁曾举行过许多药理活动,例如自由基清除,对免疫和炎症细胞功能的影响,并且通过减轻反应性氧(ROS的细胞损伤,所述Alzheimer疾病(AD)可能具有益处(ROS )。 AD中的一个关键事件是将β-淀粉样(Abeta)肽转化为脑中淀粉样蛋白斑块。防止Abeta汇总作为治疗广告的治疗策略。在该研究中,研究了槲皮素和芦丁的抗氧化和抗氧化性能。主要方法:我们研究了槲皮素和芦丁是否会影响ABETA25-35纤维生殖,等待物活动和细胞氧化还原状态。主要发现:槲皮素和芦丁抑制了Abeta Fibrils的形成并分列的Abeta Fibrils。芦丁显着抑制β-分泌酶(BACE)活性。为了类似于体内ABETA诱导的神经毒性,我们使用过表达抑制的细胞系统瑞典突变(APPSWE),其与早上的家族AD相关,并且可以促进由于增强的ABETA生产而促进氧化应激。槲皮素和芦丁在H(2)O(2)-Treated Appswe细胞中几乎完全产生的ROS产生。两种黄酮类化合物的细胞内GSH含量和氧化还原状态增加,并且对于Rutin这种效果浓度依赖性。此外,槲皮素和芦丁在所有测试的所有浓度的对照视察细胞比较中减少了脂质过氧化的指标。意义:我们的研究结果可能提供槲皮素和芦丁的神经保护作用的解释,这表明它们可能是能够在体内恢复β-淀粉样毒性的膳食植物化学性。

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