推断线粒体和细胞质代谢,通过将同位素追踪和解结合起来
Alon Stern1, Mariam Fokra2, Boris Sarvin2
1Department of Computer Science, Technion-Israel Institute of Technology, 32000, Haifa, Israel.
Nature communications
|November 18, 2023
概括
研究人员开发了一种新的计算方法来分析完整细胞内的细胞代谢. 这种技术准确地测量了线粒体和细胞质中的代谢流和度,进步了我们对细胞代谢的理解.
科学领域:
- 细胞的新陈代谢
- 系统生物学 系统生物学
- 生物化学 生物化学
背景情况:
- 了解真核细胞代谢是由于无法研究不同的亚细胞区块而受到阻碍的.
- 分析孤立的有机体引入了显著的代谢偏差.
- 现有的方法缺乏精确评估细分代谢活动的分辨率.
研究的目的:
- 开发一种新的计算方法,以推断生理代谢流和代谢物度在线粒体和细胞质中完整的细胞内.
- 克服有机细胞隔离的局限性,提高代谢分析的准确性.
- 在没有细胞分离的情况下,提供细胞下代谢活动的定量观点.
主要方法:
- 在完整的细胞中利用同位素追踪实验.
- 运用了代谢物同位素标记模式和度的计算解卷.
- 综合代谢和热力学建模以推断分隔的流量和度.
主要成果:
- 与现有方法相比,在细分流量 (一个数量级) 和度 (三个数量级) 中显著降低不确定性.
- 在培养细胞系的中央碳代谢中提供了线粒体和细胞质代谢活动的定量观点.
- 在分隔的酸盐-酸盐穿流中发现了主要的变异性.
结论:
- 开发的方法使得在完整的细胞中以亚细胞分辨率准确推断新陈代谢.
- 这种方法对于研究人类疾病中的代谢功能障碍至关重要.
- 该方法对生物工程和代谢研究中的应用具有前景.
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