在体内暴露于硫化后,大脑线粒体形态受损
Wilson K Rumbeiha1, Dong-Suk Kim2, Angela Min2
1Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA, USA. wkrumbeiha@ucdavis.edu.
Scientific reports
|October 24, 2023
概括
急性硫化 (H2S) 暴露显著损害了线粒体的结构和功能. 这项研究揭示了早期的H2S诱导的线粒体形态和晶状体破坏的变化,影响细胞健康.
科学领域:
- 线粒体生物学 线粒体生物学
- 毒理学 毒理学 毒理学
- 细胞病理学 细胞病理学
背景情况:
- 线粒体动力学受到各种因素的影响,包括饮食,治疗和毒素.
- 硫化 (H2S) 已知会损害线粒体,但其在急性暴露后对线粒体动态的具体影响尚不清楚.
研究的目的:
- 为了研究在急性暴露于致命剂量的硫化 (H2S) 后线粒体形态的时间变化.
- 了解H2S毒性对大脑线粒体的结构后果.
主要方法:
- 小鼠被暴露在一次急性LCt50剂量的硫化 (H2S) 中.
- 用电子显微镜分析了在不同时间点 (24h,48h,72h) 存活的小鼠的thalami图像的线粒体形态.
主要成果:
- 暴露后48小时内,H2S暴露导致线粒体形态受损,其特征是破坏和稀缺的晶状体,这对ATP生产至关重要.
- 在72小时后,观察到显著的细胞变化,包括 mitochondrial 网络的失调和潜在的 mitoophagy 破坏,与改变的 mitochondrial 形状相关.
- 线粒体形状和结构的变化早在24小时就显而易见,在急性H2S暴露后72小时变得更加明显.
结论:
- 急性高水平的H2S暴露会引发线粒体形状和结构的显著和时间依赖的变化.
- 这些结构变化表明H2S毒性对线粒体功能和整体细胞健康有深刻的影响.
- 这些发现突出了线粒体完整性在细胞对H2S等有毒侮辱的反应中的关键作用.
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