红氧依赖蛋白S-氨基化控制了AML中阿扎西提丁的敏感性和耐药性
Dušan Nemes1, Michaela Myšáková1, Lubomír Minařík2
1BIOCEV, First Faculty of Medicine, Charles University, Vestec, 25250, Czech Republic; Faculty of Science, Charles University, Prague, 128 00, Czech Republic.
Redox biology
|December 13, 2025
概括
急性髓性白血病 (AML) 的耐药性涉及改变的氧化还原代谢. 恢复蛋白质S-氨基化使抗AML细胞对阿扎西提丁治疗产生敏感性.
科学领域:
- 生物化学 生物化学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 药物耐药性癌症,特别是急性髓性白血病 (AML) 的特征是被破坏的氧化还原代谢.
- 了解AML耐药性中的蛋白质氧化还原信号对于开发有效疗法至关重要.
- 阿扎西提丁 (AZA) 是用于AML治疗的低甲基化剂,但耐药性限制了其有效性.
研究的目的:
- 调查蛋白质氧化还原信号在急性髓性白血病 (AML) 中的阿扎西蒂丁 (AZA) 耐药性中的作用.
- 为了确定导致抗AZA耐药AML的氧化还原稳定性破坏和恢复的机制.
- 通过准氧化还原通路,探索克服AZA耐药性的治疗策略.
主要方法:
- 基于综合性质谱的氧化还原和定量蛋白质分子分析.
- 对AML细胞系和对阿扎西提丁 (AZA) 敏感或耐药的患者样本的分析.
- 评估氧酶系统和DNA损伤反应途径.
主要成果:
- 阿扎丁 (AZA) 破坏了氧化还原稳定,使氧酶系统和DNA损伤反应失活,导致敏感AML的细胞死亡.
- 抗AZA耐药性与高谷氨和降低蛋白质S-谷氨结合的氧化还原重置有关.
- 在耐药AML细胞和患者样本中的关键途径中,AZA未能诱导蛋白质氧化.
- 药理上抑制谷氨合成恢复了蛋白质S-谷氨和耐药AML细胞中的AZA敏感性.
结论:
- 在AML中AZA耐药性涉及无法破坏回氧化恒温,其特点是升的谷氨水平.
- 向谷氨合成可以恢复蛋白质S-谷氨和克服AML中的AZA抵抗.
- 这些发现强调了氧化还原信号作为AZA耐药AML的治疗漏洞.
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