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聚乙烯纳米塑料通过过度的线粒体裂变诱导认知功能障碍和树突性脊柱恶化

Hongxiang Yu¹, Lingting Jin², Yunjia Zi³

¹Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.

Ecotoxicology and environmental safety

|October 2, 2025

概括

聚乙烯纳米塑料 (PS-NP) 进入大脑,导致认知能力下降,并通过破坏线粒体来破坏神经元. 用Mdivi-1针对线粒体裂变提供了一种潜在的治疗方法,以减轻这些神经毒性影响.

科学领域:

环境健康环境健康
神经科学是一个神经科学.
毒理学毒理学毒理学

背景情况:

聚乙烯纳米塑料 (PS-NP) 构成了越来越严重的环境健康问题.
有证据表明,纳米塑料可以穿越血脑屏障 (BBB).

研究的目的:

研究PS-NP对认知功能和神经可塑性的神经毒性影响.
阐明PS-NP诱导的神经毒性的潜在机制,重点关注线粒体功能障碍.
评估针对线粒体裂变的治疗潜力.

主要方法:

使用Thy1-GFP-M转基因小鼠的体内研究和使用初级海马神经元的体内研究.
行为测试用于评估认知功能.
树突脊柱密度和形态学的分析.
评估线粒体功能,包括膜潜力,ATP生产和裂变/融合动态.
对线粒的评估.
使用线粒体分裂抑制剂-1 (Mdivi-1) 的治疗.

主要成果:

发现PS-NPs在突破BBB后会在大脑中积累.
暴露于PS-NPs导致认知障碍,并减少海马神经元中的树突脊柱密度.
PS-NPs诱导线粒体功能障碍,其特征是膜潜力下降,ATP产生减少,线粒体裂变增加和过度的线粒体衰变.
Mdivi-1治疗改善了PS-NP诱导的神经毒性,恢复了线粒体功能,保持了树突脊柱密度,并逆转了认知缺陷.

结论:

PS-NP 具有显著的神经毒性潜力,影响认知功能和神经元结构.
线粒体功能障碍,特别是过度的分裂和线粒体衰变,是导致PS-NP神经毒性的关键机制.
准线粒体裂变是缓解PS-NP诱导的神经损伤的有希望的治疗策略.

关键词:

状脊柱的恶化脊柱的恶化线粒体分裂线粒体分裂线粒细胞衰变 - - 线粒细胞衰变 (mitophagy) 是一种神经毒性神经毒性聚乙烯纳米塑料 (PS-NP) 是一种

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