Kaempferol Has Potent Protective and Antifibrillogenic Effects for α-Synuclein Neurotoxicity In Vitro.

Kaempferol Has Potent Protective and Antifibrillogenic Effects for α-Synuclein Neurotoxicity In Vitro.
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DOI:
10.3390/ijms222111484
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发表时间:
2021-10-25
影响因子:
5.6
通讯作者:
Hozumi I
Hozumi I
中科院分区:
生物学2区
文献类型:
--
作者:
Inden M;Takagi A;Kitai H;Ito T;Kurita H;Honda R;Kamatari YO;Nozaki S;Wen X;Hijioka M;Kitamura Y;Hozumi I

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α-突触核蛋白(α-Syn)的聚集与帕金森病(PD)、路易体痴呆(DLB)和多系统萎缩(MSA)的发病机制有关。因此,去除α-Syn聚集可能会导致许多新的神经退行性疾病治疗药物的开发。在本研究中,我们利用piggyBac转座子系统成功构建了一个稳定表达α-Syn的新细胞系,以研究类黄酮山奈酚对α-Syn毒性的神经保护作用。我们发现山奈酚对α-突触相关的神经毒性具有显著的保护作用。山奈酚通过诱导转录因子EB的表达,减少α-Syn的积累,增加溶酶体的生物发生,从而诱导自噬;因此,山奈酚可以防止神经元细胞死亡。山奈酚直接阻断α-Syn淀粉样纤维的形成。这些结果支持山奈酚在以α-Syn聚集体为特征的突触核蛋白病等疾病中的治疗潜力。
Aggregation of α-synuclein (α-Syn) is implicated in the pathogenesis of Parkinson’s disease (PD), dementia with Lewy bodies (DLB), and multiple system atrophy (MSA). Therefore, the removal of α-Syn aggregation could lead to the development of many new therapeutic agents for neurodegenerative diseases. In the present study, we succeeded in generating a new α-Syn stably expressing cell line using a piggyBac transposon system to investigate the neuroprotective effect of the flavonoid kaempferol on α-Syn toxicity. We found that kaempferol provided significant protection against α-Syn-related neurotoxicity. Furthermore, kaempferol induced autophagy through an increase in the biogenesis of lysosomes by inducing the expression of transcription factor EB and reducing the accumulation of α-Syn; thus, kaempferol prevented neuronal cell death. Moreover, kaempferol directly blocked the amyloid fibril formation of α-Syn. These results support the therapeutic potential of kaempferol in diseases such as synucleinopathies that are characterized by α-Syn aggregates.
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