绕过CML中的伊马替尼布耐药性:基于特尔米沙坦的新型细胞死亡调节剂,具有改善的活性和稳定性
Maximilian Gebhart1, Mostafa Alilou2, Ronald Gust1
1Department of Pharmaceutical Chemistry, Institute of Pharmacy, University of Innsbruck, CCB-Centrum for Chemistry and Biomedicine, Innrain 80-82, 6020 Innsbruck, Austria.
European journal of medicinal chemistry
|December 5, 2024
概括
基于特尔米沙坦的新药衍生物有效地使Imatinib耐药的慢性髓性白血病 (CML) 细胞重新敏感. 这些化合物通过克服耐药性来增强氨酸激酶抑制剂 (TKI) 治疗疗效,为CML治疗提供了一个有前途的策略.
科学领域:
- 药用化学 医学化学
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 药物耐药性是癌症治疗的一个主要障碍,特别是在慢性髓性白血病 (CML) 治疗的铁激酶抑制剂 (TKIs),如伊马替尼.
- 虽然伊马替尼已经彻底改变了CML的治疗方法,但由于耐药性,大量患者无法实现长期完全缓解.
- 开发新的治疗策略以向TCI耐药CML细胞对于改善患者的治疗结果至关重要.
研究的目的:
- 合成和评估特尔米沙坦核心结构 (LEAD) 的新衍生物,以增强伊马替尼对抗TKI抗性CML细胞的疗效.
- 通过结构修改,改善之前已识别的LEAD酸 (4) 甲基 (3a) 的代谢稳定性.
- 评估这些新型LEAD衍生物对Imatinib耐药CML细胞的敏感化潜力.
主要方法:
- 合成各种LEAD- (3a-h) 与修饰的链和芳香基,以及生物异构的LEAD-胺 (5a-h).
- 在体外对雌激酶和氨基酶的水解稳定性的评估.
- 使用半最大敏感度 (SC50) 试验,评估LEAD衍生物对抗伊马替尼布的KD225 (K562耐药) CML细胞的敏感化作用.
主要成果:
- 胺基 (5a-h) 对乙酶具有很高的稳定性,胺基对短链的裂变最小.
- -基 (3a-d) 被乙酶化 (t1⁄2 = 55-82 分钟),而分支和芳香则表现出更高的稳定性 (t1⁄2 高达 360 分钟).
- 衍生物 (和胺) 是非细胞毒性且有效敏感化Imatinib耐药CML细胞,SC50值在1.3-11.2μM之间.
结论:
- 结构修改显著提高了LEAD衍生品的稳定性,芳香替代品提供了最大的稳定性.
- 完整的LEAD-和LEAD-胺对观察到的生物效应负责,在细胞内有效积累.
- 这些新型LEAD衍生物代表了一种有前途的策略,通过使耐药细胞对TKI疗法敏感,克服CML中Imatinib耐药性.
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