骨肌肉中的线粒体透性过渡 副本 肌肉变化 在癌症中观察到 囊症和其他损耗条件
bioRxiv : the preprint server for biology
|February 23, 2026
概括
线粒体透性过渡 (mPT) 诱导骨肌肉消耗表型,包括缩和受体分裂. 瘤因素参与mPT,表明它.
科学领域:
- 肌肉生理学和线粒体生物学.
- 细胞病理和疾病机制.
- 生物化学和分子信号传递.
背景情况:
- 骨肌肉消耗条件具有共同的表型:缩,线粒体功能障碍和端板乙胆受体 (AChR) 碎片化.
- 线粒体与肌肉病理有关,但导致衰竭的具体功能方面尚不清楚.
研究的目的:
- 研究骨肌肉中的线粒体透性过渡 (mPT).
- 评估mPT在肌肉消耗表型中的作用.
- 确定瘤因子是否促进mPT及其与缓冲症的联系.
主要方法:
- 在小鼠骨肌和单纤维中诱导的mPT.
- 评估了线粒体形态,活性氧物种 (mROS),Casp3活性和呼吸功能.
- 检查了 AChR 集群完整性和 lysosome-mitochondria 的同定位.
- 测试了瘤条件介质和环素D淘汰的测试效果.
- 将mPT诱导肌肉的转录组与胰腺癌缓解症模型进行比较.
主要成果:
- mPT诱导改变了线粒体形态,增加了mROS和Casp3活性,以及呼吸功能受损.
- mPT导致肌肉纤维缩和ACHR集群分裂,可以通过mPT,mROS或Casp3抑制来预防.
- 瘤条件介质降低了mPT的Ca2+值,这种效应被mPT抑制抵消.
- 在胰腺癌缓解症中观察到mPT和肌肉消耗之间的转录组重叠.
结论:
- 在骨肌肉中诱导mPT复制了肌肉消耗条件的关键表型,如缓冲症.
- 瘤宿主因子参与mPT,将其与缓解症病原发生联系起来.
- mPT代表了肌肉消耗疾病的潜在治疗标.
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