在聚乙烯纳米塑料上α-Synuclein的病理折叠通过总频散射和2D红外光谱学揭示了
Akriti Mishra1, Thaddeus W Golbek1, Asger Berg Thomassen1
1Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark.
The journal of physical chemistry letters
|November 6, 2025
概括
微型和纳米塑料 (MNP) 可以进入大脑,可能导致神经退行性疾病. 这项研究揭示了α-synuclein蛋白如何在纳米塑料上折叠和聚合,为帕金森病提供了洞察力.
科学领域:
- 环境健康 环境健康
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 微塑料和纳米塑料 (MNP) 越来越多地被认为是环境污染物.
- 许多MNP可以穿越血脑屏障,引起人们对神经毒性的担忧.
- 阿尔法-同核素 (α-syn) 聚合是帕金森病 (PD) 和其他神经退行性疾病的标志.
研究的目的:
- 阐明在聚烯纳米塑料 (NP) 上被吸附的人类α-syn的分子结构和方向.
- 了解纳米塑料在有毒α-syn聚合物的形成中的作用.
- 调查纳米塑料暴露与神经退行性疾病病原发生之间的潜在联系.
主要方法:
- 接口特定的总频散射 (SFS) 光谱学.
- 结构敏感的二维红外 (2D IR) 光谱学.
- 分子动力学模拟以产生α-syn形态.
主要成果:
- 当α-syn在聚烯NP上被吸附时,它采用了部分螺旋结构.
- α-syn 的 N-终端和非粉样成分与 NP 表面结合,而 C-终端则向外延伸.
- 在NP上的α-syn冠状体由部分聚合的结构组成,具有有序的核心和灵活的区域.
结论:
- 这项研究为纳米塑料上的α-syn折叠和聚合提供了分子层面的理解.
- 这些发现揭示了一种潜在的机制,将纳米塑料暴露与PD和相关疾病的发病机制联系起来.
- 需要进一步的研究来充分评估与大脑中MNP相关的健康风险.
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