衰老通过激活综合应激反应促进转移
Angana A H Patel1,2, Jozefina J Dzanan1,2, Kevin X Ali1,2
1Sahlgrenska Center for Cancer Research, Department of Surgery, Institute of Clinical Sciences, University of Gothenburg, Gothenburg, Sweden.
Nature
|March 12, 2026
概括
衰老通过激活由ATF4.4驱动的综合应激反应 (ISR) 来重新编程肺癌. 这促进了老年人的转移,并提出了治疗目标.
科学领域:
- 在瘤学瘤学.
- 生物老龄化 生物老龄化
- 分子生物学分子生物学
背景情况:
- 肺癌主要影响老年人,但生理衰老对瘤演变的影响尚不清楚.
- 了解衰老如何影响癌症进展对于开发向疗法至关重要.
研究的目的:
- 为了研究衰老如何影响KRAS驱动的肺腺癌的进化路径.
- 确定导致老年肺瘤转移的分子机制.
- 探索与衰老相关的肺癌相关的治疗漏洞.
主要方法:
- 在KRAS驱动的肺腺癌的老年模型中分析瘤演变.
- 研究综合应激反应 (ISR) 的作用及其效应器ATF4.
- 使用ISR-ATF4通路的遗传和药理向.
- 检查谷氨胺代谢的依赖性.
- 在患者瘤中ATF4表达的临床相关性分析.
主要成果:
- 衰老重编程肺腺癌,限制原发性瘤生长,但通过表观遗传ISR激活增强转移性传播.
- ISR效应器ATF4促进了上皮和代谢可塑性,赋予了转移能力.
- 衰老的瘤细胞对PERK-eIF2α通路具有更高的敏感性,维持ATF4信号传递.
- 向ISR-ATF4取消了转移性适应;单独过度表达ATF4就会诱导转移.
- 衰老-ATF4轴产生对谷氨胺代谢的依赖,是一种可用药物的脆弱性.
- 临床数据显示,ATF4在老年瘤中的丰富,与生存率低下和晚期疾病相关.
结论:
- 表观遗传ISR-ATF4激活是老年肺瘤血统可塑性和转移的关键驱动因素.
- 老化-ATF4轴对老年肺腺癌患者来说是一个重要的治疗机会.
- 准ISR-ATF4通路和谷氨胺代谢提供了一种新的策略来治疗这种未被研究的患者亚群.
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