聚烯纳米塑料诱导的肺上皮细胞铁致死通过YY1/FTL轴促进肺纤维化
Wenxia Bu1, Yueyuan Jin1, Yifan Zhou1
1Department of Respiratory and Critical Care Medicine, Affiliated Hospital of Nantong University, School of Public Health, Nantong University, Nantong, 226001, China.
Materials today. Bio
|January 21, 2026
概括
聚乙烯纳米塑料 (PS-NPs) 通过诱导细胞死亡途径ferroptosis引起肺纤维化. 这是因为PS-NP破坏了GPX4和FTL,导致脂质过氧化和肺损伤.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
背景情况:
- 纳米塑料 (NP),特别是聚乙烯纳米塑料 (PS-NP),是广泛存在的环境污染物.
- 新出现的证据将PS-NP与显著的肺毒性和纤维化联系起来.
研究的目的:
- 调查PS-NP诱导的肺纤维化背后的机制.
- 阐明铁化在PS-NP毒性的作用.
主要方法:
- 建立了体外 (BEAS-2B细胞) 和体内 (老鼠) PS-NP 暴露的模型.
- 利用转录基因和蛋白质基因分析来识别关键的分子通路.
- 进行实验以确认特定蛋白质 (GPX4,FTL,YY1) 在铁和纤维化中的作用.
主要成果:
- 暴露于PS-NP导致肺纤维化和膜II型细胞的铁性死亡.
- 转录基因和蛋白质基因分析揭示了铁亡途径的丰富.
- 发现PS-NP可以抑制GPX4并诱导FTL,促进脂质过氧化.
- 转录因子YY1被确定为FTL的抑制剂,其敲击改善了ferroptosis和纤维化.
结论:
- 通过一种涉及铁亡的机制,PS-NPs诱导肺纤维化.
- YY1/FTL轴在调解PS-NP诱导的铁和随后的肺纤维化方面发挥着至关重要的作用.
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