用双向传输测定通过细胞单层测定出流比的pH依赖性
Soné Kotze1, Kai-Uwe Goss1,2, Andrea Ebert1
1Department of Computational Biology and Chemistry, Helmholtz Centre for Environmental Research (UFZ), Permoserstraße 15, Leipzig 04318, Germany.
International journal of pharmaceutics: X
|December 13, 2024
概括
这项研究使用MDCK-MDR1测定来探索P-糖蛋白 (P-gp) 活性运输. 我们研究了依赖pH的流量比,以了解传送基质的偏好,揭示了MDCK系统的复杂性.
科学领域:
- 药理学 药理学是指药理学的学科.
- 生物技术是生物技术.
- 细胞生物学 细胞生物学
背景情况:
- MDCK/Caco-2测定对于评估膜透性和活性运输,特别是P-glycoprotein (P-gp) 中介运输的体外模型至关重要.
- 使用流量比率 (ER) 来量化活动运输和确定内在流量值存在挑战,特别是在运输商对电离或中性物种的偏好方面.
研究的目的:
- 研究一种方法,通过检查MDCK-MDR1试验中排泄比率 (ER) 的pH依赖来确定输送基质分数偏好.
- 为了将实验结果与模型相匹配,基于不同的转运物种偏好的假设.
- 在MDCK系统中确定并纳入额外的运输机制.
主要方法:
- 使用MDCK-MDR1基于细胞的测定来评估膜透性和活性传输.
- 研究了基本,酸性和非解离化合物流出比率 (ER) 的pH依赖性.
- 开发和应用计算模型来解释传送器基质偏好,并纳入已识别的运输路径.
主要成果:
- 观察到额外的证据,以前没有表征,在底侧膜的流入输送器.
- 这项研究表明,细胞运输,新型的底侧流入运输器,以及对运输器的潜在pH影响,使得从ER中提取内在活性运输值变得复杂.
- 发现抑制剂的使用会影响对细胞运输的测量.
结论:
- 虽然关于载体物种偏好的确切迹象仍然难以捉摸,但这项研究显著提高了对MDCK细胞系统的理解,用于药物运输研究.
- 这些发现强调了由于多种相互作用的运输机制和环境因素,精确确定活跃运输参数的复杂性.
- 这项工作为改进体外模型提供了基础,以更好地预测体内药物处置.
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