瓦尼林诱导的细胞毒性与CYP3A介导的代谢激活的相关性
Qiang Zhao1, Zixia Hu1, Aixuan Wang1
1Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China.
Journal of agricultural and food chemistry
|August 28, 2024
概括
瓦尼林 (VAN) 可以通过代谢激活引起肝损伤. 研究表明,酶CYP3A启动了这种途径,产生有毒的中间体,并突出显示了香草素代谢和肝脏毒性之间的联系.
科学领域:
- 毒理学 毒理学 毒理学
- 药物新陈代谢 药物新陈代谢
- 生物化学 生物化学
背景情况:
- 众所周知,一种常见的调味剂瓦尼林 (Vanillin,简称VAN) 在高剂量时会导致肝损伤.
- 瓦尼林诱导的肝毒性背后的确切机制尚未完全理解.
- 调查VAN的代谢激活对于阐明其毒理学特征至关重要.
研究的目的:
- 为了检查香草素 (VAN) 的代谢激活.
- 为了识别VAN的反应性代谢物.
- 为了确定VAN的活性代谢产物及其细胞毒性之间的相关性.
主要方法:
- 用大鼠肝脏显微体,减少的谷氨酸/N-乙半氨酸 (GSH/NAC) 和NADPH化VAN.
- 使用分析技术识别GSH和NAC合物.
- 从暴露于VAN的老鼠和肝细胞中分析胆汁和尿液.
- 使用基托可纳 (KTZ) 向CYP3A活性的酶抑制研究.
主要成果:
- 两种GSH合物和一种NAC合物被鉴定为*in vitro*.
- 在大鼠胆汁和肝细胞中检测到GSH合物,在大鼠尿液中检测到NAC合物 *in vivo*.
- 一种子中间体被确定为VAN代谢的产物.
- 鉴定出CYP3A是负责VAN代谢激活的主要酶.
- 凯托可纳 (KTZ) 抑制了GSH结合体的形成,并减轻了肝细胞中VAN诱导的肝毒性.
结论:
- 瓦尼林 (VAN) 在体外*和体内*都经历了代谢激活,可能是通过一种子中间体.
- 细胞染色体P450酶CYP3A在启动VAN的有毒代谢途径方面发挥着关键作用.
- 由CYP3A介导的代谢激活被认为是素诱导的细胞毒性背后的机制.
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