皮拉津胺与异亚胺对它们对小鼠肝脏血红蛋白生物合成途径的影响的比较
Fu-Ying Qin1, Ruizhi Gu1, Jiaojiao Zhang1
1Center for Pharmacogenetics, Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, 335 Sutherland Drive, Pittsburgh, PA 15261, USA.
Metabolites
|June 25, 2025
概括
异化 (INH) 通过改变血红素合成酶来加剧病,导致有毒中间体的积累. 皮拉津胺 (PZA) 没有表现出这种影响,这表明其在病患者的禁用可能是不合理的.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 结核病 (TB) 药物伊索尼亚齐德 (INH) 和皮拉津胺 (PZA) 由于潜在的血红通路干扰,在症中禁用.
- 甲状腺症包括由血红素生物合成缺陷引起的代谢障碍.
研究的目的:
- 调查INH和PZA在症中的禁忌的机制基础.
- 在小鼠模型中比较INH和PZA对肝血红蛋白生物合成酶和中间体的影响.
主要方法:
- 评估了关键的血生物合成酶的肝脏表达和活性:氨基利武林酸合成酶1 (Alas1) 和铁甲酸酶 (Fech).
- 利用INH或PZA治疗小鼠的肝脏和便样本的代谢分析.
主要成果:
- INH显著提高了Alas1的表达和活动,同时降低了Fech.
- 在小鼠肝脏中,INH治疗导致有毒中间体,氨基氨酸 (ALA) 和原氨酸IX (PPIX) 的积累.
- PZA对Alas1或Fech表达或活性没有显著影响.
结论:
- 这项研究提供了关于INH如何通过血红素生物合成失调来加剧病的机制性见解.
- 这些发现挑战了PZA在病患者当前的禁忌,这表明它可能不会带来与INH相同的风险.
相关概念视频
Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems
343
Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
343
Basicity of Heterocyclic Aromatic Amines
6.3K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
6.3K


