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SUCLG1 限制了 POLRMT 化,以增强线粒体生物发生和白血病进展

Weiwei Yan¹, Chengmei Xie¹, Sijun Sun^1,2

¹Precision Research Center for Refractory Diseases, Institute for Clinical Research, Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, 200080, Shanghai, China.

The EMBO journal

|April 22, 2024

概括

顺酸-CoA酶SUCLG1调节线粒体RNA聚合酶 (POLRMT) 顺化,影响线粒体功能和白血病细胞生长. 这一发现将新陈代谢调节与通过线粒体生物发生的癌症进展联系在一起.

科学领域:

线粒体生物学线粒体生物学
癌症代谢癌症代谢
分子瘤学分子瘤学

背景情况:

线粒体通过电子运输链 (ETC) 产生细胞能量,其中重要的蛋白质由线粒体DNA (mtDNA) 编码.
人们对mtDNA功能的代谢调节及其在癌症中的作用仍然不太了解.

研究的目的:

阐明代谢途径调节线粒体DNA (mtDNA) 功能的机制.
为了研究酸盐-CoA酶SUCLG1在癌症,特别是白血病中的作用.

主要方法:

对TCGA癌症转录组的分析,以确定代谢酶和ETC基因之间的相关性.
生物化学试验,以确定SUCLG1对基尼尔-CoA度和POLRMT基尼化的影响.
在白血病模型中使用POLRMT和SUCLG1的遗传枯竭的体外和体内研究.

主要成果:

SUCLG1的表达与ETC基因相关,并通过限制 succinyl-CoA来抑制POLRMT糖化.
在氨酸622的POLRMT糖化中,破坏了它与mtDNA和转录因子的相互作用.
在白血病中由FLT3突变驱动的SUCLG1上调,增强了线粒体生物发生和增殖.

结论:

SUCLG1通过POLRMT低糖化作用作为mtDNA转录的代谢调节剂.
这一途径对于白血病细胞的增殖和线粒体生成至关重要,特别是在FLT3突变的病例中.
准SUCLG1-POLRMT轴为白血病提供了一个潜在的治疗策略.

关键词:

类似于FMS的氨酸激酶3 氨酸糖化氨酸糖化线粒体生物发生的过程线粒体RNA聚合酶是一种线粒体RNA聚合酶.酸盐-CoA结合酶的结合酶

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