陶酸化通过FKBP8受体调节来抑制氧化应激诱导的线粒
Michael O Isei1, Meredith Crockett1, Emily Chen1
1University of Rochester, Department of Anesthesiology & Perioperative Medicine, Rochester, New York, USA.
bioRxiv : the preprint server for biology
|July 19, 2024
概括
在阿尔茨海默氏症中异常的陶酸化会损害线粒体,即清除受损线粒体的过程. 这项研究表明,与疾病相关的突变破坏了小鼠神经元中的线粒体受体FKBP8水平,表明FKBP8是治疗标.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 神经退行性疾病,包括阿尔茨海默病 (AD),与线粒体功能障碍有关.
- 异常的陶酸化是阿尔茨海默病的标志,它破坏了细胞,这是一种关键的细胞质量控制机制,用于清除受损的线粒体.
- 病理干扰线粒细胞衰变的确切分子机制在很大程度上是未知的.
研究的目的:
- 研究与疾病相关的 fosforylation 在抑制哺乳动物神经元细胞中的线粒细胞衰变中的作用.
- 在氧化应激过程中识别受突变影响的特定线粒细胞受体.
- 为了阐明和线粒细胞衰变途径之间的潜在分子相互作用.
主要方法:
- 利用了不朽化的小鼠海马神经元细胞系.
- 表达的相仿性突变 (EC和EM) 模仿AD相关的酸化位.
- 使用帕拉克瓦特诱导的线粒体氧化应激.
- 采用免疫学和生物化学方法来量化细胞受体水平 (FKBP8,FUNDC1,BNIP3).
主要成果:
- 相仿性突变体 (EC,EM) 部分抑制了帕拉克瓦特诱导的线粒细胞衰变.
- 帕拉克瓦特治疗导致表达EC或EM的细胞中的FKBP8水平降低,但不是野生型.
- 在野生型和突变的表达细胞中,FUNDC1和BNIP3水平随着帕奎特治疗而下降.
- 疾病相关的似乎影响了FKBP8在线过程中进入内质网的贩运.
结论:
- 与疾病相关的陶酸化部分抑制了哺乳动物神经元中的线粒细胞衰变.
- 在氧化应激过程中,甲基受体FKBP8在疾病相关的突变物存在时被选择性下调.
- 陶氏病理可能会干扰FKBP8的贩运,导致阿尔茨海默氏症中线粒体功能障碍.
- 在神经退行性疾病中,FKBP8是缓解线粒体功能障碍的潜在治疗标.
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