在急性淋巴细胞白血病中,威尼托克拉克斯耐药性的特点是线粒体活性增加,并且可以通过共同向氧化酸化来克服
Stefanie Enzenmüller1, Alexandra Niedermayer1,2, Felix Seyfried1
1Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany.
Cell death & disease
|July 3, 2024
概括
在B细胞前体急性淋巴细胞白血病 (BCP-ALL) 中,威尼托克拉克斯的耐药性与线粒体代谢的增加有关. 将BCL-2抑制剂与线粒体抑制剂 (如Oligomycin) 结合起来,可以克服这种抗性,为BCP-ALL.提供了一种新的治疗策略.
科学领域:
- 分子瘤学分子瘤学
- 癌症新陈代谢 癌症新陈代谢
- 血液学恶性瘤是什么
背景情况:
- 放松调节的亡是B细胞前体急性淋巴细胞白血病 (BCP-ALL) 的标志,有助于白血病发生和治疗失败.
- 作为BCL-2抑制剂的Venetoclax (VEN) 在淋巴细胞恶性瘤中表现有前途,但由于BCP-ALL中的VEN不敏感性而面临挑战.
- 了解VEN抗性的机制对于开发有效的治疗策略至关重要.
研究的目的:
- 模拟和研究BCP-ALL中VEN耐药性的基础机制.
- 确定克服BCP-ALL中的VEN不敏感性的策略.
- 评估共同准BCL-2和线粒体新陈代谢的潜力.
主要方法:
- 使用RNA-seq分析生成和表征抗VEN的BCP-ALL细胞系.
- 在细胞系和患者衍生异种移植 (PDX) 样本中测量代谢概况,氧气消耗和ATP生产.
- 评估线粒体DNA含量和形态.
- 评估VEN与Oligomycin (一种氧化酸化抑制剂) 的协同活性.
主要成果:
- 抗VEN的BCP-ALL基因表现出与酸循环和电子运输链相关的显著上调的基因,表明线粒体代谢增加.
- 主要VEN不敏感的PDX-ALL样本显示较高的氧气消耗和ATP生产率,证实了增强的线粒体活性.
- 抗VEN细胞显示线粒体DNA含量增加和线粒体形态变化 (更大,更长的结构).
- 与VEN和Oligomycin同时治疗显示出协同活性,并诱导VEN抗性BCP-ALL细胞系和PDX样本的亡.
结论:
- 重编程,高线粒体代谢是BCP-ALL中VEN抵抗的一个关键特征.
- 同时准BCL-2和氧化化 (OxPhos) 是一个有前途的策略,以克服既获得的和内在的VEN不敏感性.
- 这些研究结果支持进一步的临床前和临床评估,结合BCL-2和OxPhos抑制VEN耐药BCP-ALL.
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