突变驱动的胎儿回归在结直肠癌中促进了表型可塑性
bioRxiv : the preprint server for biology
|December 18, 2023
概括
结肠直肠癌 (CRC) 耐药性涉及一个与LGR5+干细胞 (SCs) 共同演变的胎细胞 (OnF) 细胞状态. 针对OnF和SC状态对于CRC中持续的瘤回归至关重要.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症干细胞研究研究
背景情况:
- 针对癌症干细胞 (CSCs) 对于有效的癌症治疗至关重要.
- 在结直肠癌 (CRC) 中对LGR5+ CSC枯竭的抵抗机制尚未完全理解.
研究的目的:
- 识别有助于CRC进展和药物耐药性的新细胞状态.
- 阐明LGR5+ CSC中驱动抗性的分子机制.
- 探索针对CRC多个细胞状态的组合疗法.
主要方法:
- 研究了一种原始细胞状态,称为子宫内胚胎 (OnF) 状态.
- 利用了APC的遗传删除,并评估了Retinoid X受体 (RXR) 活性.
- 分析了涉及YAP和AP1.1的表观遗传电路.
- 在体内进行了表型追踪和切除实验.
主要成果:
- 发现了OnF状态,该状态与LGR5+干细胞 (SCs) 在CRC瘤进化中协作.
- OnF重编程是由APC删除和减少RXR活动引发的,涉及YAP/AP1.1.
- 在OnF状态赋予耐化疗,并使LGR5+ CSC进入药物耐受性状态.
- 在OnF和SC状态之间表现出功能冗余,需要对瘤回归进行双重向.
结论:
- 确定胎内状态是CRC进展和治疗耐药性的关键驱动因素.
- 发现了一个新的RXR-YAP-AP1轴调节OnF细胞可塑性.
- 强调必须针对OnF和LGR5+SC进行持续的CRC瘤回归.
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