溶解体铁的积累和随后的溶解体-线粒体铁传递介于PFOS诱导的肝细胞铁亡
Jixun Li1, Ruzhen Feng1, Wei Yang1
1Environment and Occupation Health Department, Dalian Medical University, 9 Lushun South Road, Dalian, China.
Ecotoxicology and environmental safety
|August 15, 2024
概括
perfluorooctane sulfonate (PFOS) 通过破坏溶酶体和线粒体铁运输,导致肝细胞铁过载和铁. 自和TRPML1-VDAC3相互作用是这个过程中的关键调节者.
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 生化学
背景情况:
- perfluorooctane sulfonate (PFOS) 是一种持久性有机污染物,与肝脏铁死有关.
- 以前的研究表明,PFOS会引起线粒体铁过载,但确切的机制尚不清楚.
- 要了解PFOS诱导的铁亡,需要阐明其对细胞铁恒温的影响.
研究的目的:
- 为了研究PFOS诱导的肝脏ferroptosis的精确机制.
- 探索自,溶酶体和线粒体铁运输在PFOS毒性的作用.
- 确定参与PFOS介导铁失调的关键分子参与者.
主要方法:
- 对L-O2细胞暴露于PFOS,并评估溶酶体和线粒体中的铁含量.
- 操纵自,短暂受体潜在粘脂蛋白1 (TRPML1) 和电压依赖的阴离子选择通道 (VDACs) 的表达.
- 分析溶酶体和线粒体之间的铁转移.
- 研究肝脏组织和细胞中的蛋白质相互作用.
主要成果:
- 暴露于PFOS会增加L-O2细胞中的溶酶体铁积累.
- 抑制自减轻了溶酶体铁过载.
- 抑制TRPML1增加了溶酶体铁和减少了线粒体铁.
- VDAC3,但不是VDAC1或VDAC2,介于线粒体铁过载和溶酶体-线粒体铁转移.
- 在PFOS处理的样本中观察到TRPML1和VDAC3之间的增强关联.
结论:
- 自在暴露于PFOS下调节铁恒温起着至关重要的作用.
- TRPML1-VDAC3相互作用对溶酶体-线粒体铁转移至关重要,解释了PFOS诱导的铁亡.
- 这项研究揭示了一种新的铁传递机制,并提供了对PFOS毒性的见解.
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