线粒体超氧化物水平的增加部分与韦穆拉费尼布诱导的脏管道毒性有关
Akimasa Sanagawa1, Hiroshi Takase2
1Department of Clinical Pharmaceutics, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
Basic & clinical pharmacology & toxicology
|February 28, 2025
概括
韦穆拉菲尼布通过损害线粒体和溶解体而导致损伤. 抗氧化剂部分保护细胞,这表明超氧化物生产有助于维穆拉非尼 (VEM) 诱导的管毒性.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 分子毒理学分子毒理学
- 细胞生物学 细胞生物学
背景情况:
- 维穆拉非尼 (VEM) 与管毒性有关,可能是通过线粒体呼吸链抑制和降低铁甲基酶 (FECH) 活性.
- 驱动VEM诱导的管毒性的精确机制仍然不完全理解.
研究的目的:
- 在人类脏近道管状上皮细胞中研究背后的细胞机制,以维穆拉芬尼为诱导的管状毒性.
- 阐明线粒体功能障碍和溶酶体异常在VEM毒性中的作用.
主要方法:
- 人类脏邻近管状上皮细胞被用VEM治疗.
- 评估了细胞活力,乳酸脱酶释放和炎症性细胞因子的产生.
- 使用传输电子显微镜 (TEM),光显微镜,MitoTracker和mtSOX来评估线粒体和溶酶体的变化.
- 研究了线粒体特异性抗氧化剂XJB-5-131和巴菲洛米辛A1的作用.
主要成果:
- VEM治疗诱导了细胞损伤,降低了活力,增加了LDH释放,并增加了炎症性细胞因子.
- VEM导致了溶酶体衍生的真空积累/扩大,并增加了线粒体超氧化物生产.
- TEM揭示了线粒体损伤,mtSOX证实了增强的超氧化物生产.
- XJB-5-131部分缓解了VEM诱导的超氧化物产生,并改善了细胞活力.
- 巴菲洛米辛A1没有缓解VEM诱导的细胞毒性,这表明潜在的自功能障碍.
结论:
- 以超氧化物过度生产为特征的线粒体功能障碍和溶酶体异常是VEM诱导管毒性的关键贡献者.
- 这些发现表明了减轻VEM毒性的潜在治疗点.
- 需要进一步的研究来探索VEM对FECH活动,线粒体功能,溶酶体功能和膜保护的影响之间的相互作用.
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