通过PS-NPs破坏大脑胆固醇平衡:天体细胞内等离子体网络应激应激
Lei Tian1, Yizhe Wei1,2, Jianping Ma1
1Military Medical Sciences Academy, Academy of Military Sciences, Tianjin, 300050, China.
Journal of nanobiotechnology
|December 24, 2025
概括
聚乙烯纳米塑料 (PS-NPs) 通过诱导星球细胞内质网膜应激来破坏大脑胆固醇代谢. 这会损害胆固醇的合成和运输,最终抑制神经元突触的形成,导致神经毒性.
科学领域:
- 神经科学是一个神经科学.
- 毒理学 毒理学 毒理学
- 生物化学 生物化学
背景情况:
- 胆固醇对于突触功能和大脑膜流动性至关重要.
- 星球细胞是脑胆固醇的主要来源,由于血脑屏障.
- 聚乙烯纳米塑料 (PS-NPs) 对大脑胆固醇代谢的影响还没有得到充分研究.
研究的目的:
- 研究PS-NP对内胆固醇代谢途径的影响.
- 阐明PS-NP影响天体细胞和神经元功能的机制.
- 通过破坏胆固醇平衡来评估PS-NP的神经毒性潜力.
主要方法:
- 全脑器官 (WBO) 被暴露在PS-NP中.
- 整体转录组测序被用来分析路径变化.
- 一个Transwell神经元-星细胞共同培养模型被用来研究星细胞-神经元相互作用.
主要成果:
- 在星球细胞中,PS-NPs诱导了内质网膜应激和自 (ATF4,CHOP,LC3-II/I比率升高).
- PS-NPs抑制了AKT/ACLY通路,降低了天体细胞乙-CoA和胆固醇.
- PS-NPs降低了阿波利波蛋白APOE,阻碍了胆固醇的运输,并抑制了突触蛋白 (SYN) 的形成.
结论:
- 通过破坏天体细胞胆固醇平衡,PS-NP诱导神经毒性.
- 胆固醇合成和PS-NPs的运输受损会抑制神经元突触发生.
- 准内质网膜通路可能会恢复胆固醇合成和神经元突触受PS-NPs影响.
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