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衰老指导着KRAS驱动的肺腺癌的差异性演变
Felicia Lazure1, Stanislav Drapela1, Xiaoxian Liu2
1Department of Molecular Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA.
衰老显著影响肺腺癌 (LUAD) 演变,推动KRAS驱动的瘤进入类似茎状的状态. 这种与年龄相关的转变是由瘤微环境中的特定细胞驱动的,建议为老年患者量身定制的疗法.
科学领域:
- 在瘤学瘤学.
- 衰老研究研究 衰老研究
- 癌症生物学 癌症生物学
背景情况:
- 肺腺癌 (LUAD) 主要影响老年人,而KRAS驱动的LUAD构成了重大治疗挑战.
- 虽然突变积累是传统观点,但宿主生物学在癌症进化中的作用越来越被认可.
- 晚年对KRAS驱动的LUAD进展的特定影响仍然不太清楚.
研究的目的:
- 为了研究晚年如何影响KRAS驱动的LUAD的进化.
- 描述LUAD瘤微环境 (TME) 中与年龄相关的变化.
- 确定衰老影响LUAD进展和预后的机制.
主要方法:
- 在KP (KrasG12D/+; Trp53flox/flox) LUAD上使用了单细胞RNA测序.
- 将瘤移植到年轻和老老的小鼠身上,以模拟与年龄相关的影响.
- 分析的重点是不同年龄段的LUAD细胞进化和TME组成.
主要成果:
- 衰老的肺部环境促进了LUAD向原始的,类似茎的表型的进化.
- 在LUAD中,这种类似茎状的状态与预后较差相关.
- 在老年TME中观察到与损伤相关的膜分化中间细胞 (ADI) 的积累,影响LUAD细胞信号传递.
结论:
- 宿主衰老是协调LUAD进化的关键因素,特别是在KRAS驱动的亚型中.
- 受ADI细胞影响的老年TME驱使LUAD走向更具侵略性的干状状态.
- 未来的LUAD疗法应该考虑患者的年龄,特别是老年人,以改善治疗结果.
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