氧化代谢在瘤发生过程中驱动神经干细胞的永生
François Bonnay1, Ana Veloso2, Victoria Steinmann1
1Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), 1030 Vienna, Austria.
Cell
|September 11, 2020
概括
由线粒体融合驱动的新陈代谢重编程对于使瘤发起细胞 (TIC) 永生至关重要. 这一过程涉及氧化化 (OxPhos),对于癌症的发展至关重要.
科学领域:
- 癌症学
- 细胞代谢
- 线粒体生物学
背景情况:
- 代谢重编程是癌症的标志性特征,
- 瘤发起细胞 (TIC) 需要特定的代谢适应才能持续生长和增殖.
- 了解早期瘤发生的代谢驱动因素对于开发向疗法至关重要.
研究的目的:
- 研究新陈代谢重编程,特别是氧化化 (OxPhos) 在瘤发起细胞 (TIC) 永生化中的作用.
- 确定线粒体融合和OxPhos是否是癌症开始的速度限制步骤.
- 阐明TIC与发源神经干细胞 (NSC) 的代谢需求.
主要方法:
- 单细胞转录组用于识别Drosophila脑瘤中的细胞群.
- 针对性代谢和体内基因查以评估代谢依赖性.
- 在体内NADH/NAD+传感器用于监测永生过程中的代谢活动.
- 通过基因操纵阻止线粒体融合和OxPhos.
主要成果:
- 随着OxPhos的上调,多索菲拉脑瘤呈现出快速分裂的干细胞群.
- OxPhos对于TIC永生是必不可少的,但对于最初形成瘤的神经干细胞 (NSC) 则不是.
- 阻断OxPhos或线粒体融合通过损害NAD+再生来阻止TIC永生,从而导致静止.
结论:
- 线粒体融合诱导的新陈代谢编程是TIC永生化的速度限制步骤.
- 氧化酸化是致力于瘤形成不可逆转的关键代谢途径.
- 这项研究揭示了细胞代谢与致癌细胞之间的直接联系.
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