脱离药物诱导的衰老状态的白血病细胞中的异质性
David Miller1, Kyra Kerkhofs2, Farnoosh Abbas-Aghababazadeh3
1Department of Biology, York University, Toronto, ON, M3J 1P3, Canada. david_miller@hms.harvard.edu.
Cell death & disease
|August 5, 2023
概括
红素 (EPO) 通过衰老促进癌细胞的存活,导致药物耐药性和复发. 用洛昆准 lysosome 活动显示 senolysis 的潜力,提供新的治疗途径.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 红素 (EPO) 可以通过诱导衰老状的状态来促进癌细胞的存活,这允许白血病细胞在药物治疗后持续存在.
- 这些衰老细胞的子集可以重新进入细胞循环,导致疾病复发,突出需要了解药物耐受性机制.
研究的目的:
- 研究EPO诱导白血病细胞进入类似衰老的状态的药物耐受性和复发机制.
- 确定针对衰老白血病细胞的潜在治疗策略,并评估衰老基因特征的预后价值.
主要方法:
- 利用单细胞测试来追踪药物诱导衰老的退出以及随后单个白血病细胞的扩散.
- 分析了逃脱的衰老细胞中的基因表达异质性,专注于衰老相关的基因,新陈代谢和衰老相关的分泌表现型 (SASP).
- 产生并验证了衰老基因特征作为急性髓性白血病 (AML) 和其他癌症的预后标志物. 评估了诺基因在促进老化白血病细胞老化中的有效性.
主要成果:
- 观察到异步退出衰老,在逃脱的白血病细胞克隆中具有不同的增殖率.
- 鉴定了药物敏感性和基因表达的克隆间变异性,一些克隆保留了与衰老相关的基因表达.
- 确立了衰老基因特征作为AML和其他癌症中总生存率更差的预后标记.
- 证明了一部分衰老性白血病细胞依赖于 lysosome 活动,并且可以被洛昆向 senolysis.
结论:
- 由EPO诱导的衰老有助于药物耐受性和白血病复发,通过促进耐药细胞群的持久性.
- 衰老基因签名在各种癌症中具有预后价值,包括AML.
- 用洛昆等药物准 lysosome 活动代表了消除衰老白血病细胞和克服药物耐药性的潜在策略.
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