矩阵刚度会导致染色体数的遗传性变化,这与固体瘤异质性相一致.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
固体瘤硬度,由原-I引起,驱动着遗传性DNA变化和突变. 这种机械进化过程创造了遗传多样性,使癌症治疗复杂化.
科学领域:
- 生物物理学的生物物理.
- 癌症生物学 癌症生物学
- 遗传学 遗传学 是一个
背景情况:
- 固体瘤表现出丰富的原-I,导致组织硬化.
- 瘤发生的特点是染色体异常,包括损失和收益.
研究的目的:
- 为了研究3D矩阵刚性与细胞DNA遗传性变化之间的联系.
- 了解固体瘤中的机械力如何影响遗传不稳定性和进化.
主要方法:
- 使用活细胞染色体报告器 (ChReporters) 和具有可调节刚性的水凝.
- 量化了 mitotic 压缩,微核数和 ChReporter 损失率作为矩阵刚性的函数.
- 分析了2D和3D培养中的球状体生长,细胞分裂和肌酸-II活性.
- 进行了临床数据的泛癌分析,将原I水平与遗传变异相关联.
主要成果:
- 增加的矩阵刚度与较高的线粒压缩率,微核形成和染色体记者损失相关.
- 在3D培养中,肌二抑制后染色体损失增加,澄清了其瘤抑制作用.
- 全癌症数据将原I水平和遗传变异与染色体损失和增加联系起来.
- 癌症球体中的可遗传突变遵循了卢里亚-德尔布鲁克理论的预测,超过了波桑统计数据.
结论:
- 3D矩阵的刚性会诱导遗传性DNA变化,导致固体瘤的机械进化.
- 瘤硬性通过达尔文-拉马克过程促进了基因异质性,这给治疗带来了挑战.
- 肌氨酸II通过在硬的3D环境中减轻染色体损失,起到瘤抑制作用.
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