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通过细胞内NMR量化中型分子的细胞透性和向性

Yota Sukigara¹, Hajime Kamoshida², Yuji Tokunaga^1,2

¹Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-0033, Japan.

Analytical chemistry

|August 25, 2025

概括

我们开发了一种浮动的细胞内核磁共振方法, 以测量中等大小的分子如何进入细胞并与细胞内目标接触. 这种技术为开发针对蛋白质相互作用的新药提供了宝贵的见解.

科学领域:

生物化学
分子生物学
药理学

背景情况:

中型分子,包括宏循环和循环,是针对细胞内蛋白质相互作用 (PPI) 的有希望的药物候选物.
这些分子的细胞透性和细胞内向的评估是很困难的,因为现有的数据有限.
现有的细胞内核磁共振 (NMR) 方法面临敏感性和细胞封装的潜在缺陷的挑战.

研究的目的:

开发一种新的浮动细胞内核磁共振 (NMR) 策略,用于量化细胞透性和中等大小分子的细胞内向.
克服传统的细胞内核磁共振方法的局限性,提高灵敏度并保持细胞活力.
为开发针对细胞内PPI的药物产生定量药动力学数据提供一个工具.

主要方法:

开发了活哺乳动物细胞的浮动细胞内核磁共振技术.
使用该方法测量FK506的细胞透率和细胞内向亲缘关系.
评估了该方法对另一种中等大小的分子 - - 拉帕米辛的适用性.

主要成果:

在保持细胞存活的同时,浮动细胞内NMR策略提高了测量灵敏度.
成功量化了FK506的细胞透和细胞内向.
证明温度的增加加快了FK506细胞的透,而不会改变细胞内亲和力,这表明了温度依赖的膜流动性效应.
验证了该方法的适用性.

结论:

浮动细胞内核磁共振方法提供了一种敏感且可靠的方法,用于评估活细胞中的中型分子药理动力学.
这种策略使细胞透性和细胞内向的定量评估能够在没有化学修饰的情况下进行.
这些发现为合理设计针对细胞内PPI的中型分子提供了宝贵的见解.

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