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在synucleinopathy模型中,α-synuclein聚合和lysosomal稳态的相互影响

Alice Drobny¹, Fanni Annamária Boros¹, Denise Balta¹

¹Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, 91054, Erlangen, Germany.

Translational neurodegeneration

|June 13, 2023

概括

在帕金森病模型中,α-synuclein聚合会损害 lysosomal cathepsin 功能. 恢复甲素运输降低了α-synuclein水平,这表明神经退行症的治疗点.

科学领域:

神经科学是一个神经科学.
细胞生物学细胞生物学
生物化学生物化学

背景情况:

lysosomal 功能障碍与神经退行性疾病,如帕金森病 (PD) 有关.
α-synuclein (αSyn) 聚合是PD的关键病理特征.
Lysosomal 途径和蛋白质,特别是 cathepsins,在 αSyn 降解中起着至关重要的作用.

研究的目的:

为了研究αSyn聚合物的对 lysosomal homeostasis 和 cathepsin 功能的影响.
了解多巴胺基神经元中αSyn聚合和 lysosomal酶活性之间的相互作用.

主要方法:

利用患者衍生的诱导多能干细胞和PD的转基因小鼠模型.
通过生物化学分析,研究了细胞内αSyn对象对多巴胺基神经元恒温和溶酶体功能的影响.

主要成果:

在具有αSyn聚合的DA神经元中观察到 lysosomal trafficking 损伤和 cathepsins 蛋白质分解活性降低.
一种法纳西转移酶抑制剂通过激活ykt6增强了cathepsin的成熟和活性,导致αSyn水平降低.

结论:

αSyn聚合直接干扰着甲素的酶功能,形成一个受损降解的循环.
被破坏的 lysosomal trafficking 的 cathepsins (CTSD, CTSL, CTSB) 减少了 αSyn 的清除.
增强 cathepsin 运输到 lysosomes 增强其活动,并促进有效的αSyn 降解,提供一个潜在的治疗策略.

关键词:

多巴氨基神经元是多巴氨基神经元.lysosome 是一个溶解体.帕金森病是帕金森氏症的一种疾病.贩卖蛋白质的人口贩运综核蛋白病变 (Synucleinopathy) 是一种同核蛋白病变的疾病.从iPSC衍生的模型

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