阴离子代谢产物是由人体CYP3A4A4由丁丁尼布形成的
Shimon Nakashima1, Tatsuki Fukami2, Takashi Kudo3
1Drug Metabolism and Toxicology, Faculty of Pharmaceutical Sciences, Kanazawa University, Kanazawa, Japan.
Drug metabolism and pharmacokinetics
|July 28, 2024
概括
研究人员确定了宁泰达尼布的潜在反应性代谢物,iminium离子,由人体肝脏中的细胞染色体P450 3A4 (CYP3A4) 形成. 这一发现可能有助于澄清因丁丹尼布引起的肝损伤的原因.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药物新陈代谢 药物新陈代谢
- 肝毒性 肝毒性 肝毒性
背景情况:
- 丁丁达尼布治疗异常性肺纤维化和其他纤维化肺部疾病.
- 肝脏新陈代谢,水解和葡萄糖化是 nintedanib.的主要清除途径.
- 离子形成,一种潜在的反应性代谢物,是从nintedanib的结构中预测的.
研究的目的:
- 在人类肝脏中研究从宁泰达尼布中形成的iminium离子.
- 澄清细胞P450酶在宁泰达尼布代谢中的作用.
- 识别潜在的反应性代谢物,有助于忍丹尼布诱导的肝损伤.
主要方法:
- 在NADPH的存在下,用人类肝脏和肠道显微体化宁泰达尼布.
- 使用液体染色学-并联质谱法 (LC-MS/MS) 用化作为捕获剂检测不稳定的离子.
- 使用基托可纳 (一种CYP3A4抑制剂) 和复合P450酶的抑制研究.
主要成果:
- 在 nintedanib 的 piperazine 环上形成了两个 iminium 离子代谢产物.
- 这些代谢物的形成被基托可纳显著抑制.
- 在测试的复合P450中,只有P450 3A4 (CYP3A4) 形成了化添加物.
- 在人类肝脏显微体中观察到CYP3A4蛋白丰富度和离子代谢物形成之间的正相关性.
结论:
- 阴离子代谢产物由人肝中的CYP3A4从丁丁尼布形成.
- 这些iminium离子是潜在的反应性代谢物.
- 这些发现提供了关于忍者达尼布诱导的肝损伤机制的见解.
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