通过ACSL4介导的ZIP7-VDAC3相互作用调节了在PFOS暴露下肝细胞中的内细胞网膜-线粒体铁转移
Peiyao Liang1, Kefan Tian1, Wei Yang1
1Department of Environmental and Occupational Health, Dalian Medical University, 9 West Lvshun South Road, Dalian, China.
The Science of the total environment
|November 23, 2024
概括
暴露在 perfluorooctane sulfonate (PFOS) 中会导致铁在内分泌网膜 (ER) 和线粒体中积聚. 乙-A合成酶4 (ACSL4) 调解这种铁交叉,影响铁和PFOS毒性.
科学领域:
- 环境毒理学环境毒理学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- perfluorooctane sulfonate (PFOS) 是一种持久性有机污染物,与有害健康影响有关.
- 之前的研究表明,PFOS增加了线粒体铁和-CoA合成酶长链家族成员4 (ACSL4) 的表达,这是一种铁灭路径执行者.
- 由于ACSL4位于与线粒体相关的内质网膜 (ER) 中,这表明它在器官间的通信中起着作用.
研究的目的:
- 在暴露于PFOS下,研究ACSL4在ER-线粒体铁交叉中的作用.
- 阐明在PFOS毒性期间细胞区内铁失调的分子机制.
主要方法:
- 使用小鼠肝脏和人类肝细胞 (L-02) 进行实验.
- 研究了PFOS对ER和线粒体铁积累的影响.
- 研究了溶解物载体家族39成员7 (SLC39A7/ZIP7),电压依赖性离子通道3 (VDAC3) 和线粒体单载体 (MCU) 在铁运输中的作用.
- 评估了ACSL4,ZIP7和VDAC3.3之间的相互作用.
主要成果:
- 暴露于PFOS导致小鼠肝脏和L-02细胞在ER中积累铁.
- 抑制ZIP7缓解了线粒体铁过载和增加了ER铁.
- Knockdown 的 VDAC3 或 MCU 逆转了线粒体铁过载,并恶化了 ER 铁积累.
- 在PFOS治疗后,ACSL4与ZIP7和VDAC3发生相互作用.
- 抑制ACSL4减少了ZIP7-VDAC3的相互作用,减轻了线粒体铁过载,增加了ER铁.
结论:
- 暴露于PFOS会破坏ER-线粒体的铁稳态.
- ACSL4在调节ER和线粒体之间的铁交叉中发挥着至关重要的作用.
- 这些发现揭示了ACSL4在铁网调节中的功能,并突出了它对PFOS毒性的贡献.
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