奎平可以竞争性地抑制阿尔德海德氧化酶介导的还原
Hinata Ueda1, Shuho Asano1, Katsuya Narumi2
1Laboratory of Clinical Pharmaceutics and Therapeutics, Division of Pharmasciences, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
Drug metabolism and disposition: the biological fate of chemicals
|October 16, 2025
概括
奎平非竞争性地抑制化氧化酶 (AOX) 氧化,但竞争性地抑制其降解. 这表明,西亚zepines可能与AOX的减小口袋结合,影响药物相互作用.
科学领域:
- 药理学 药理学 是一个学科.
- 酶学 是一种酶学.
- 药物新陈代谢 药物新陈代谢
背景情况:
- 氧化酶 (AOX) 对于代谢含的异环和芳香药物至关重要.
- 索类药物,如奎平和克洛扎平,是已知的AOX抑制剂,需要了解它们的相互作用机制,以预测药物相互作用 (DDI).
研究的目的:
- 阐明索类药物的抑制机制,特别是氨酸和氨酸,在 aldehyde氧化酶 (AOX) 上.
- 根据确定的抑制模式来预测AOX基质和抑制剂之间的潜在药物相互作用.
主要方法:
- 进行了酶动力学测试,以确定对AOX.AOX.的奎蒂亚平,其代谢物和克洛扎平的抑制模式和抑制常数 (Ki).
- 评估了AOX氧化和还原活动,分别使用fthalazine和flunitrazepam作为基质.
- 测试了丁氧化酶活性,以评估潜在的交叉反应性.
主要成果:
- 奎蒂亚平及其代谢物抑制了AOX氧化和还原,奎蒂亚平和诺基亚平表现出最强效应.
- 奎平表现出非竞争性抑制甲氧化 (Ki = 5.72 μM) 和竞争性抑制弗鲁尼特拉塞帕姆降解 (Ki = 5.71 μM).
- 克洛沙平对AOX降低的混合抑制 (Ki = 30.91 μM),对酶基质复合物的亲和力低于自由酶.
结论:
- 佐西类药物可能通过与电子供体口袋结合来抑制AOX,可能会被入酶中.
- 奎平对AOX降低的竞争性抑制是一种新发现,突出了其对该酶的显著亲和力.
- 在评估DDI涉及竞争性AOX抑制剂 (如奎胺) 的时候,仔细考虑基质和抑制剂度至关重要.
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