生物直角点击释放的分支的亲光体
Thomasin Brind1, Aggie Lawer1, Tobias Todd1
1School of Pharmacy, University of Otago, 18 Frederick Street, Dunedin, 9054, New Zealand.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 24, 2025
概括
新的分支双核支架在生物对等点击释放策略中增强药物释放. 这一创新加速了前药物激活,提高了潜在的癌症治疗药物产量,特别是在酸性瘤环境中.
科学领域:
- 化学生物学 化学生物学
- 药用化学 医学化学
- 药物运输 药物运输 药物运输
背景情况:
- 生物对等点击释放前药物激活需要快速和高产的反应.
- 压力促进的烯酸点击释放策略通常会经历药物缓慢释放,尽管快速点击反应.
- 提高药物产量和释放动力学对于有效的前药物激活至关重要.
研究的目的:
- 在生物直角点击释放策略中开发分支的双核支架,以增强药物释放.
- 研究不同核心-1和核心-2结构对点击反应速率和药物释放动力学的影响.
- 优化前药物激活,以提高产量和持续释放,特别是在酸性瘤微环境中.
主要方法:
- 分支式双核支架的合成,其中包括缺电子的酸 (核心-1) 和富含电子的自焚链接器 (核心-2).
- 使用四甲基亚酸与甲基替代物用于与跨环烯 (TCOs) 的快速点击反应.
- 嵌入的N-甲基碳酸盐或以太链接器和1,4/1,4-或1,4/1,6-自焚支架在核心-2.
- 测量了光释放率和确定了循环添加反应的二次速率常数.
主要成果:
- 一个通过N-甲基碳酸盐连接的1,4/1,6-自焚核-2证明了持续和增强的光体释放.
- 获得了最快的循环加法 (22.0 M−1 s−1) 与 d-TCO 的第二阶速常数.
- 观察到一种持续的中间体,导致长时间的光体释放.
- 酸性条件 (pH5.5) 与中性条件 (pH7.4) 相比,导致化物释放量大约高出15%.
结论:
- 分支的双核支架显著改善药物释放动力学和生物对等点击释放系统中的产量.
- 快速点击核心 (核心-1) 和持续释放链接器 (核心-2) 的组合对前药物激活是有效的.
- 这些发现有助于推进预先定位的体内生物对等点击释放前药物策略,特别是在酸性瘤微环境中.
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