综合的体外分析评估了与rifabutin相比,rifampicin的药物相互作用风险的变量
Julie Nilles1,2, Johanna Weiss1, Max Sauter1
1Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
Archives of toxicology
|June 7, 2023
概括
里法素和里法布丁在它们如何影响CYP3A4和P-糖蛋白 (Pgp) 等药物代谢酶方面有所不同. 里法布丁是一种较弱的诱导剂,但是一种强大的PGP抑制剂,这解释了其较低的药物相互作用风险.
科学领域:
- 药理学 药理学 是一个学科.
- 药物新陈代谢 药物新陈代谢
- 分子生物学分子生物学
背景情况:
- 利法布丁的药物相互作用比利法素少,可能是由于细胞染色体P450 3A4 (CYP3A4) 和P-糖蛋白 (Pgp/ABCB1) 诱导的差异.
- 之前的研究缺乏对相同剂量的直接比较或考虑细胞内度的直接比较,使分子机制不清楚.
研究的目的:
- 关于PXR激活,CYP3A4和Pgp调节和活性,研究里法素和里法布丁之间的药理差异.
- 阐明它们独特的药物相互作用特征背后的分子机制,考虑细胞内度.
主要方法:
- 用不同度的里法素和里法布丁对待LS180细胞.
- 评估细胞吸收,孕妇X受体 (PXR) 激活,CYP3A4和Pgp表达/活性,以及使用质谱,光酶测定,PCR,酶测定和流动细胞计的抑制作用.
主要成果:
- 里芬素显示细胞吸收较差,但PXR激活较强,导致CYP3A4和Pgp表达/活性增加.
- 里法布丁表现出更高的细胞内积累,但是一种较弱的PXR激活剂和基因诱导剂.
- 里法布丁强烈抑制了Pgp (IC50 = 0.3μM) 与里法素 (IC50 = 12.9μM) 相比.
结论:
- 利法素和利法布丁对CYP3A4和Pgp的调节和功能表现出明显的影响,即使在细胞内度正常化时也是如此.
- 利法布丁的强效Pgp抑制可能会抵消其较弱的诱导效应,从而导致其临床药物相互作用潜力较低.
关键词:
在ABCB1中,ABCB1是ABCB1.在 CYP3A4 中.诱导是一种诱导.在Pgp中,Pgp是指Pgp的意思.里法布丁 (Rifabutin) 是一种药物.里法皮辛 (Rifampicin) 是一种药物.更多相关视频
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