身体线粒体DNA突变是原发性白血病细胞中异质性的来源
medRxiv : the preprint server for health sciences
|October 14, 2024
概括
儿科白血病体内线粒体DNA (mtDNA) 突变显示出不同的选择性压力. 单细胞测序将这些突变与癌细胞的细胞状态变化和功能异质性联系起来.
科学领域:
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
- 系统生物学 系统生物学
背景情况:
- 身体线粒体DNA (mtDNA) 突变在瘤中很常见,但它们的生物学意义尚不清楚.
- 了解mtDNA突变的影响是复杂的,因为选择性压力,异质体和细胞状态.
- 儿科癌症为研究mtDNA突变动态提供了一个独特的背景.
研究的目的:
- 为了研究小儿白血病体质mtDNA突变的选择性压力.
- 为了将mtDNA突变与白血病细胞的细胞状态变化和功能异质性相关联.
- 使用先进的测序技术,区分致病性与乘客mtDNA突变.
主要方法:
- 大量全基因组测序匹配的瘤和儿童癌症患者的正常样本.
- 单细胞测序 (SCS) 与数学建模的整合.
- 基于网络的系统生物学方法分析突变分布和细胞状态.
主要成果:
- 在儿科白血病中观察到同名和非同名mtDNA突变的明显积累模式.
- 在细胞状态变化,瘤丰富mtDNA突变和选择性压力之间发现了相关性.
- 特定的异质细胞mtDNA突变与细胞反应有关,有助于白血病细胞异质性和健康.
结论:
- 在癌症中,SCS策略对于区分致病性与乘客体的mtDNA突变是有价值的.
- 选择性压力在很大程度上影响了mtDNA突变在个体癌细胞中的分布.
- mtDNA突变在儿科白血病细胞的功能异质性和适应性中发挥作用.
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