早期的肺癌是由一个依赖于KRAS-ITGA3-SRC轴的过渡细胞状态驱动的
Aaron L Moye1,2,3, Antonella Fm Dost1,2,3,4, Robert Ietswaart3
1Stem Cell Program and Divisions of Hematology/Oncology and Pulmonary Medicine, Boston Children's Hospital, Boston, MA, USA.
The EMBO journal
|May 16, 2024
概括
克拉斯突变通过劫持正常的肺细胞修复状态来启动肺腺癌. 针对这种异常细胞可塑性,以及SRC,可能为早期肺癌提供新的治疗策略.
科学领域:
- 分子生物学分子生物学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 在KRAS (KRASG12) 中的甘氨酸-12突变是肺腺癌 (LUAD) 的关键发起者.
- KRASG12突变改变了膜II型原生细胞 (AT2),但它们与肺内稳定和细胞命运的相互作用仍然不清楚.
研究的目的:
- 为了研究KRASG12D突变对AT2细胞转录动态和肺平衡的影响.
- 确定AT2细胞可塑性的保护调节剂及其在LUAD启动中的作用.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 的AT2-介酶体有机体共同培养,小鼠模型和人类LUAD患者样本.
- 时间分析KRASG12D突变对AT2细胞基因表达的影响.
- 在有机体模型中使用KRASG12D和SRC抑制剂的抑制试验.
主要成果:
- 在正常的AT2细胞自我更新和分化之前,一种暂时的损伤/可塑性状态.
- 克拉斯G12D突变AT2细胞表现出这种损伤/可塑性状态的持续保留.
- 改变的受体表达,包括ITGA3和SRC共同表达,在模型中表现出KRASG12D相关的损伤状态.
- 结合KRASG12D和SRC抑制降低了KRASG12D-突变AT2器官的生长.
结论:
- 肺修复损伤/可塑性状态是通过KRAS突变在AT2细胞自我更新和LUAD启动期间被选择的.
- 早期的LUAD可以通过向这种劫持细胞状态的致癌方面来治疗.
- 同时针对KRASG12D和SRC,为LUAD提供了一个潜在的治疗策略.
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