埃索梅普拉在生物相关的二碳酸盐缓冲剂中的化学稳定性以及针对特定降解产品的探索性研究
Ayaka Takasusuki1, Takahiro Takayama2, Koichi Inoue2
1Laboratory of Molecular Pharmaceutics, College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1, Nojihigashi, Kusatsu-shi, Shiga 525-8577, Japan.
Journal of pharmaceutical and biomedical analysis
|December 10, 2025
概括
与酸盐缓冲溶液 (PPB) 相比,生物相关的二碳酸盐缓冲溶液 (BCB) 并没有改变埃索梅普拉的降解率. 然而,BCB显示了特定降解产品的丰富性增加,突出了缓冲区依赖的降解途径.
科学领域:
- 制药科学 制药科学
- 药物的稳定性 药物的稳定性
- 分析化学 分析化学
背景情况:
- 药物降解研究对于配方开发和保质期确定至关重要.
- 缓冲组合可以影响药物的稳定性和降解途径.
- 生物相关的缓冲系统旨在更准确地模仿生理条件.
研究的目的:
- 为了比较生物相关的二碳酸盐缓冲溶液 (BCB) 与酸盐缓冲溶液 (PPB) 对埃索梅普拉 (ESM) 降解的影响.
- 调查缓冲物种是否影响降解途径,即使缓冲容量和离子强度等同.
- 评估BCB适用于准确的药物降解产品分析的适用性.
主要方法:
- 埃索梅普拉 (ESM) 的稳定性研究是在37°C的10mMBCB和31mMPPB (pH5.5,β=4.0mM/pH,I=0.14M) 中进行的.
- 在多个时间点使用高性能液态染色学 (HPLC) 量化了降解产品.
- 使用液体染色学质谱法 (LC-MS) 分析了降解产品的识别和相对丰度.
主要成果:
- 在BCB和PPB之间ESM的降解速率常数中没有发现显著差异.
- 与PPB相比,LC-MS分析表明BCB中的两个特定降解产品 (m/z330和298) 的丰度较高.
- 在BCB中发现的降解产物与之前报告的化合物一致.
结论:
- 缓冲物种,而不仅仅是缓冲容量或离子强度,可以影响药物降解途径.
- 使用像BCB这样的生物相关缓冲系统对于更准确地评估药物降解产品至关重要.
- 这些发现强调了选择适当的缓冲系统对于可靠的药物稳定性测试的重要性.
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