针对ETV6::RUNX1白血病前细胞中的瘤基因诱导衰老
Denise Acunzo1, Mayla Bertagna1, Giulia Risca2
1Tettamanti Center, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy.
Cell death discovery
|March 12, 2026
概括
儿科白血病中的ETV6::RUNX1融合基因通过瘤基因诱导衰老 (OIS) 诱导了白血病前状态. 针对这种衰老的疗法,如老化剂,在消除白血病前细胞和预防白血病进展方面表现有前途.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 儿科B细胞前体急性淋巴细胞白血病 (BCP-ALL) 通常涉及t(12;21) 转位,产生ETV6::RUNX1 (E::R) 融合基因.
- 这种E:R融合建立了白血病前状态,但其机制尚不清楚.
- 之前的研究表明,E::R表达在小鼠亲B细胞中诱导了瘤基因诱导衰老 (OIS) 的特征.
研究的目的:
- 调查E::R在诱导血液细胞衰老中的作用.
- 确定和验证由E::R驱动的白血病前细胞的治疗点.
- 探索用于预防白血病进展的老化疗法.
主要方法:
- 在BaF3细胞和Sca1-E::R转基因小鼠中的E::R表达.
- 对衰老标记物的分析 (β-银酸酶,ROS,SASP).
- 调查p53通路和亡耐药性.
- 对老化剂 (SSK1,piperlongumine) 和诱导细胞亡的药物 (TM5441) 的测试.
主要成果:
- E::R表达诱导了类似衰老的表型,包括改变的形态,增加的β-galactosidase活性,ROS和SASP.
- E::R 失调了p53通路,导致p53积累和细胞衰亡受损,尽管细胞循环停止.
- 老化性SSK1和piperlongumine选择性地消除了E::R+细胞;TM5441诱导了亡.
- 在体内研究证实了E::R诱导的OIS在白血病前细胞和SSK1治疗后减少殖民地形成.
结论:
- 在白血病前的造血细胞中,RUNX1驱动了瘤基因诱导的衰老和亡抵抗.
- 准衰老途径是一个可行的治疗策略,可以消除白血病前细胞.
- 针对衰老的疗法有可能预防E::R载体的白血病发展和复发.
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