在点击释放化学中, орто功能化皮里迪尼尔-四素打破了点击反应率和裂变产量之间的反向相关性
Ron M Versteegen1, Raffaella Rossin2, Ivo A W Filot3
1SyMO-Chem B.V., Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands.
Communications chemistry
|December 20, 2024
概括
研究人员改善了抗体-药物合物 (ADC) 的四氨酸触发的有效载荷释放. 新的整形替代四氨酸提高了有效载荷释放效率,使得更低的剂量可用于有效的癌症治疗.
科学领域:
- 药用化学 医学化学
- 生物结合化学 生物结合化学
- 药物输送系统 药物输送系统
背景情况:
- 对抗体-药物联结物 (ADCs) 来说,与转环子素 (TCO) 的生物对等氨酸反应是有前途的.
- 由于稳定的中间产品,临床使用受到高反应性四素的有效载荷释放率较低的限制.
研究的目的:
- 为了研究四氨酸触发的TCO裂变中低有效载荷释放率的原因.
- 开发新型四素,克服改善药物输送和ADC应用的限制.
主要方法:
- 研究了由bis-(2-pyridinyl) -tetrazine形成的4,5-dihydropyridazine中间体的稳定性.
- 合成了与基结合组 (基,氨基) 配合的 орто替代 bis-pyridinyl-tetrazines.
- 评估有效载荷释放产量和四氨酸的活性 in vitro 和 in vivo 在小鼠的瘤上ADC激活.
主要成果:
- 4,5-二二里达中间体的稳定性可以防止高反应性四酸释放有效载荷.
- 用结合组进行替代促进了分体化和有效的有效载荷消除.
- 实现了96%的释放产量,具有18倍更具反应性的四素.
- 在小鼠中,在10至20倍较低的剂量下,证明了近量化的ADC转化.
结论:
- 氨酸触发的有效载荷释放效率取决于二胺酸中间体的稳定性.
- 带有结合组的整形替代四素显著增强了点击可拆解ADC的有效载荷释放.
- 这些发现使得治疗剂量降低,ADC治疗癌症的疗效提高.
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