DNA-PKcs/JNK/p53通路是DNA复制灾难期间细胞命运决定死亡的变化的基础
Jinal A Patel1, Julie Rageul1, Natalie Lo1
1Department of Pharmacological Sciences, State University of New York at Stony Brook, Stony Brook, NY 11794, United States.
Nucleic acids research
|June 25, 2025
概括
用ATR抑制剂向癌细胞DNA复制可以触发复制灾难,一种细胞死亡形式. 这种策略使治疗诱导的衰老细胞转向细胞亡,增强抗癌治疗的疗效.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 细胞生物学 细胞生物学
背景情况:
- 癌症治疗往往面临由于治疗诱导的衰老的局限性,这可能会对患者的治疗结果产生负面影响.
- 在癌细胞中加剧DNA复制压力是一种潜在的治疗策略.
研究的目的:
- 研究一种新的治疗策略,将急性复原体功能障碍与阿塔克西亚电脉切割和与Rad3相关的 (ATR) 抑制相结合.
- 通过诱导复制灾难来使衰老的癌细胞转向细胞死亡.
主要方法:
- 利用RNA测序来识别参与细胞死亡的p53-响应基因.
- 研究了c-Jun N-终端激酶 (JNK) 在p53-依赖性亡和γH2AX分布中的作用.
- 在复制灾难中阐明了涉及DNA-PKcs,CHK1,MRE11和PARP1的信号级联.
主要成果:
- 确定了一组独特的p53响应基因,这些基因对诱导细胞死亡至关重要.
- 证明JNK激活与p53形成了一个前循环,以驱动亡和γH2AX泛核分布.
- 确定DNA-PKcs激活启动复制灾难信号,涉及MRE11和PARP1识别单链DNA缺口.
结论:
- 这项研究阐明了DNA-PKcs/JNK/p53信号轴调节衰老和死亡之间的细胞命运决策.
- 由特定的信号通路驱动的复制灾难,代表了癌症治疗中的可针对性漏洞.
- 这种方法有可能限制衰老细胞种群并提高抗癌治疗的疗效.
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