慢性缺氧重塑瘤微环境,以支持质瘤干细胞生长
J G Nicholson1, S Cirigliano1, R Singhania1
1Department of Neurology, Weill Cornell Medicine, New York, NY, USA.
Acta neuropathologica communications
|March 26, 2024
概括
长期与质瘤干细胞 (GSCs) 共培养的大脑器官显示慢性缺氧和氧化应激促进瘤生长. 星球细胞由缺血网络驱动,分泌加速GSC扩张的因素,这可能解释与年龄相关的质瘤攻击性.
科学领域:
- 神经科学是一个神经科学.
- 癌症生物学 癌症生物学
- 干细胞研究 干细胞研究
背景情况:
- 质母细胞瘤 (GBM) 研究从模拟脑瘤微环境的模型中获益.
- 与大脑器官 (COs) 共同培养的患者衍生的质瘤干细胞 (GSCs) 提供了一个可处理的模型.
- 对这些共同培养的长期监测 (ltGLICOs) 提供了关于瘤发展动态的见解.
研究的目的:
- 开发和描述一种新的长期脑器官和质瘤干细胞共同培养模型 (ltGLICOs).
- 研究老化瘤微环境对GSC扩张和质母细胞瘤发育的影响.
- 在有机体模型中识别细胞相互作用和驱动GSC增殖的分子机制.
主要方法:
- 使用胚胎干细胞衍生COs和低水平的GCs生成长期GLICOs (ltGLICOs).
- 单细胞剖析和多原子分析以表征细胞组成和基因表达.
- 受体-连接体建模用于预测细胞-细胞相互作用和功能验证缺氧和氧化应激作用.
主要成果:
- ltGLICOs在GSC扩张之前表现出长时间的潜伏期,正常的有机体发育最初不受影响.
- 衰老的有机体会产生慢性缺氧和氧化应激,重塑微环境以促进GSC的扩张.
- 通过缺血网络调节的星细胞被确定为关键相互作用体,分泌由低氧驱动的FGF1等亲瘤原生因子.
结论:
- 老化的大脑器官中的慢性缺氧和氧化应激是GSC扩张的关键驱动因素.
- 缺氧诱导的天体细胞信号传递是促进质母细胞瘤干细胞增殖的关键机制.
- 年龄相关的脑缺氧可能有助于观察到患者年龄与质瘤攻击性之间的相关性.
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