治疗诱导的APOBEC3A驱动着持久性癌细胞的演变
Hideko Isozaki1,2, Ramin Sakhtemani3,4, Ammal Abbasi3
1Massachusetts General Hospital Cancer Center, Boston, MA, USA. hisozaki@mgh.harvard.edu.
Nature
|July 5, 2023
概括
向性肺癌治疗可以诱导APOBEC3A (A3A),导致持久性癌细胞的突变. 抑制A3A可能会延迟获得的耐药性,提供新的治疗策略.
科学领域:
- 癌症学
- 遗传学
- 分子生物学
背景情况:
- 对向性抗癌疗法获得的耐药性是一个主要的临床挑战.
- 治疗期间瘤演变的机制,特别是药物耐药性,尚未完全理解.
- 基因组研究表明,阿波利波蛋白B信使RNA编辑催化型多类 (APOBEC) 细胞氨基酶在瘤进化中的作用.
研究的目的:
- 调查APOBEC细胞氨基酶,特别是APOBEC3A (A3A) 在肺癌向治疗期间获得的耐药性的作用.
- 确定有针对性的疗法是否诱导A3A,以及这是否有助于瘤的进化和抵抗.
主要方法:
- 分析肺癌细胞和患者的瘤.
- 通过向治疗来评估A3A诱导.
- 在耐药性持续细胞中评估APOBEC介导的突变和基因组不稳定性.
- 基因删除A3A以评估其对抗性的影响.
- 在患者瘤中分析APOBEC突变特征.
主要成果:
- 常见的肺癌向疗法在耐药性持续细胞中诱导APOBEC3A (A3A).
- 治疗诱导的A3A导致持续的突变和基因组不稳定性的增加.
- 删除A3A减少了APOBEC突变和结构变异,延缓了药物耐药性.
- 在初始反应后发展出耐药性的肺癌患者中发现了APOBEC突变特征.
结论:
- 通过向治疗诱导A3A驱动耐药性持续细胞的进化.
- 在肺癌中,A3A在获得的耐药性方面发挥着重要作用.
- 抑制A3A活性或表达可能是预防或延迟对肺癌向治疗的治疗策略.
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