在人类相关度下,[a]烯会在内皮细胞中诱导适应性线粒体动力学反应
Joan Guillouzouic1, Camille Chauvin1, Valentine Genet1
1Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé Environnement et Travail) - UMR_S 1085, F-35000, Rennes, France.
Environmental pollution (Barking, Essex : 1987)
|December 20, 2025
概括
低剂量的[a]烯 (B[a]P) 暴露会导致内皮细胞中压力诱导的线粒体过 (SIMH),从而延迟亡. 线粒体是B[a]P的早期目标,动态变化表明细胞反应.
科学领域:
- 环境毒理学环境毒理学
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 多环芳 (PAH) 是环境污染物,对公众健康构成风险.
- 线粒体是PAHs的关键细胞标,如[a]pyrene (B[a]P) 由于它们的功能和组成.
- 细胞对人类相关的PAH度的反应尚不清楚.
研究的目的:
- 研究低剂量B[a]P如何影响内皮细胞中的线粒体平衡 (生物发生,线粒体生殖,动态) 和细胞亡.
- 在环境相关剂量下识别B[a]P毒性的早期细胞标志物.
- 为了阐明B[a]P诱导的细胞死亡的机制.
主要方法:
- 人类微血管内皮细胞 (HMEC-1) 暴露于100nM的B[a]P.
- 评估了线粒体生物发生标记物 (mRNA),自流,线粒体动力学 (延长/裂变因子),ATP水平和亡.
- 研究了由CYP1酶引起的B[a]P生物激活.
主要成果:
- B[a]P没有改变线粒体生物生成mRNA,但阻断了自流.
- 早期,短暂的线粒体延长 (SIMH) 发生,DRP1/MFF减少,ATP增加.
- 在24小时后,B[a]P诱导了依赖于线粒体的,独立于酶的亡,与SIMH标志物下降相吻合.
结论:
- 内皮细胞利用SIMH延迟B[a]P诱导的亡.
- 线粒体是低剂量B[a]P暴露的敏感目标.
- 线粒体动态的变化是细胞对B[a]P反应的早期指标.
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