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核心分子时钟因素通过CSC/EMT途径和脂质滴生物生成来调节骨肉瘤干细胞的生存和行为
Sukanya Bhoumik1, Yool Lee1,2,3,4
1Department of Translational Medicine and Physiology, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA 99202, USA.
Cells
|April 11, 2025
概括
昼夜时钟调节骨髓瘤中癌症干细胞 (CSC) 功能. 核心时钟基因的破坏会损害CSC的生存,迁移和脂质代谢,这表明其具有治疗潜力.
科学领域:
- 在瘤学瘤学.
- 时间生物学 时间生物学
- 癌症干细胞生物学
背景情况:
- 昼夜时钟控制着生物节奏,并影响癌症的进展.
- 癌症干细胞 (CSCs) 驱动瘤的开始,复发和转移.
- 生物钟和CSC功能之间的相互作用尚未完全理解.
研究的目的:
- 研究核心分子钟因子在调节骨髓瘤 (OS) 干细胞生存和行为的作用.
- 阐明昼夜时钟中断对OS中CSC特性和脂质代谢的影响.
- 在OS患者样本中探索昼夜钟基因的临床相关性.
主要方法:
- 使用人类骨髓瘤 (143B) 细胞系和体内异种移植.
- 采用球形形成测试来评估CSC的自我更新能力.
- 使用siRNA介导的基因沉默来耗尽核心时钟组件 (BMAL1,CLOCK,CRY1/2,PER1/2).
- 分析了与茎状性,上皮层-介质细胞过渡 (EMT) 和脂质生成相关的基因表达.
- 在人类OS患者样本上进行了转录基因分析.
主要成果:
- 核心时钟基因 (BMAL1,CLOCK,CRY1/2,PER1/2) 的枯竭显著减少了143B CSC中的球状体的形成.
- 淘汰BMAL1,CLOCK,或CRY1/2损害了CSC的迁移和入侵.
- 沉默核心时钟基因改变了干性和EMT相关基因的表达.
- 破坏BMAL1,CLOCK或CRY1/2通过降低脂质生成基因的调节来减少脂质滴形成.
- CRY1表达与OS患者的预后,存活率和脂质生成基因表达呈正相关性.
结论:
- 核心分子时钟因素对骨髓瘤CSC的生存,自我更新,迁移和脂质代谢至关重要.
- 循环时钟的干扰会对CSC的特性和代谢途径产生负面影响.
- CRY1是骨髓瘤的潜在预后生物标志物.
- 准核心的生理时钟机器为骨髓瘤提供了潜在的治疗策略.
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