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定义导致小鼠皮肤瘤的克隆动态

Adriana Sánchez-Danés, Edouard Hannezo, Jean-Christophe Larsimont

|July 27, 2016

概括

只有在干细胞,而不是原始细胞中发出瘤的刺信号. 干细胞瘤的生长涉及自我更新和亡的抵抗,导致侵袭性基底细胞癌.

科学领域:

癌症学
发育生物学
细胞生物学

背景情况:

在瘤突变后,瘤生成涉及细胞动态的复杂变化.
启动瘤形成的特定细胞类型及其动态在很大程度上是未知的.
基底细胞癌 (BCC) 是最常见的人类癌症,起源于皮肤表皮.

研究的目的:

在不同的皮肤表皮细胞群体中研究瘤性刺信号的作用.
确定哪种细胞类型 (干细胞或原始细胞) 可以引发基底细胞癌.
阐明瘤开始和进展的细胞动态.

主要方法:

使用小鼠皮肤表皮作为模型系统.
在特定的表皮细胞群中激活了瘤性刺信号.
分析了细胞分裂模式,自我更新能力和细胞灭亡抵抗力.
追踪了克隆扩张和瘤的进展.

主要成果:

只有干细胞,而不是祖细胞,在接受瘤性刺信号时会启动瘤形成.
瘤基因向干细胞的瘤形成的特征是增加对称的自我更新分裂.
来自干细胞的瘤表现出增强的p53依赖性对亡的抵抗力,促进了快速的克隆扩张.
这些动态导致了侵袭性基底细胞癌的进展.

结论:

瘤基因向细胞诱导瘤的能力取决于它们的内在克隆动态.
干细胞具有独特的特性,使它们能够在致癌性损伤时启动和驱动瘤形成.
了解细胞起源动态对于理解瘤发生和开发基底细胞癌的向治疗至关重要.

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