开发用于MCYN-扩大神经母细胞瘤的双极光-A和极光-B降解PROTAC
Sydney E Nelson1,2, James R Tucker1, Madelen G Prado1
1Department of Chemistry and Biochemistry, Berry College, Mount Berry, GA 30149 (USA).
ChemMedChem
|August 11, 2025
概括
新的双降解PROTACs,dAurAB2和dAurAB5,可以有效地降低神经母细胞中的Aurora-A,Aurora-B和N-Myc水平. 这些PROTACs通过向关键瘤驱动因素,显示出对治疗MYCN增强神经母细胞瘤的前途.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 神经母细胞瘤中MYCN放大与生存率差 (<50%) 相相关.
- 极光-A和极光-B激酶的过度表达通过稳定N-Myc.加剧了神经母细胞瘤的致癌潜力.
- 现有的以Aurora-A为目标的蛋白质分解向仿真体 (PROTACs) 可以减少Aurora-A和N-Myc,但不能减少Aurora-B.
研究的目的:
- 设计和评估能够同时降解 Aurora-A 和 Aurora-B 激酶的 PROTAC.
- 评估这些双降解PROTACs在MYCN增强神经母细胞瘤细胞中的疗效.
- 调查这些PROTACs对N-Myc水平和神经母细胞瘤细胞总体活力的影响.
主要方法:
- 针对奥罗拉-A和奥罗拉-B的双降解PROTACs (dAurAB2和dAurAB5) 的设计和合成.
- 用dAurAB2和dAurAB5.5治疗MYCN增强的IMR32神经母细胞瘤细胞.
- 通过定量蛋白质组学量化定量化Aurora-A,Aurora-B和N-Myc蛋白质水平.
- 通过全球蛋白质组学查评估细胞活力和标选择性.
主要成果:
- dAurAB2和dAurAB5强烈降解了Aurora-A和Aurora-B (例如,dAurAB5的DC50:Aurora-A 8.8nM,Aurora-B 6.1nM). dAurAB2和dAurAB5强烈降解了Aurora-A和Aurora-B (例如,dAurAB5的DC50为AurAB5:Aurora-A 8.8nM,Aurora-B是6.1nM).
- 这些PROTACs实现了89%-97%的Aurora-A和Aurora-B降解,降低了38%-45%的N-Myc水平.
- dAurAB5表现出更广泛的目标参与,降低了氨酸氨酸激酶 (TTK) 的下调,并将IMR32细胞活力降低了55%.
结论:
- 双向的PROTACs dAurAB2和dAurAB5在降解神经母细胞瘤中的Aurora-A,Aurora-B和N-Myc方面是有效的.
- dAurAB5对光激酶和TTK的多目标活性为MYCN增强神经母细胞瘤提供了一个有前途的治疗策略.
- 这些新型的PROTACs代表了一类新的抑制剂,用于治疗神经母细胞瘤和潜在的其他由这些致癌途径驱动的癌症.
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