通过基于生理学的动力模型估计内源性形成的N-尼托胺的生物可用度
Max Spaenig1, Matthias Vogel2, Tanja Hansen1
1Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany.
ALTEX
|June 26, 2025
概括
从像埃纳拉普利尔这样的药物中内源性形成的氨酸 (NA) 可以超过安全摄入限值. 基于生理学的动力学 (PBK) 建模表明存在重大风险,强调需要先进的制药杂质评估.
科学领域:
- 制药化学 制药化学 制药化学
- 毒理学 毒理学 毒理学
- 药理动力学 药理动力学
背景情况:
- N-氨酸胺 (NA) 是致癌杂质,氨酸胺与药物相关杂质 (NDSRI) 受到致癌效能分类方法 (CPCA) 的监管.
- NDSRI可以从二次氨基酸内源性地在体内形成,正如以模拟胃条件下的埃纳拉普利尔,普拉诺洛尔和素所证明的那样.
研究的目的:
- 调查内源性形成的NA是否达到血或肝脏度超过CPCA衍生的可接受摄入限值.
- 评估基于生理学动力学 (PBK) 建模在评估内源性形成的胺杂物风险方面的实用性.
主要方法:
- 使用体外ADME参数 (肠道透性,肝清除) 开发一个通用的PBK模型.
- 用已知的活性药物成分 (API) 的体内ADME数据验证PBK模型.
- 应用验证的PBK模型来评估由伊纳拉普利尔,醇和素形成的NDSRI.
主要成果:
- 对于数据丰富的API,PBK模型预测与体内ADME数据有很好的相关性.
- 在胃条件下形成的N-nitrosoenalapril达到血和肝脏水平,分别大约是CPCA值的800倍和400倍.
- 由于其半衰期很长,fluoxetine的尼托胺在长期暴露时显示出生物积累的潜力.
结论:
- 内源性形成的氨酸,特别是N-氨基乙烯,可以显著超过可接受的摄入量限制.
- PBK 建模是药品中酸胺杂质风险评估的一个有价值的工具.
- 这种方法支持管理制药杂质的证据权重战略.
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