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纳灵宁向并抑制单胺氧化酶A/B,以双向调节肠道运动
Qi Li1, Yi Chen1, Yige Zhang1
1Department of Traditional Chinese Medicine, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China.
Chemico-biological interactions
|September 13, 2025
概括
宁素 (NAR) 通过选择性抑制单氨酸氧化酶A (MAO-A) 和单氨酸氧化酶B (MAO-B) 酶来双向调节肠道运动. 研究了NAR对MAO活性和神经递质代谢的剂量依赖作用.
科学领域:
- 药理学 药理学是指药理学的学科.
- 胃肠病学 胃肠病学
- 生物化学 生物化学
背景情况:
- 单胺氧化酶 (MAO) 通过降解单胺神经递质来调节肠道运动.
- MAO-A 和 MAO-B 异型具有差异性的表达和对宁素 (NAR) 的明显抑制值.
- 作为一种黄类物质的NAR可以竞争性地抑制MAO-A和MAO-B.
研究的目的:
- 通过选择性MAO亚型抑制阐明NAR通过选择性MAO亚型抑制调节肠机动性的分子机制.
- 分析NAR对MAO活性和肠机动性的影响的剂量效应关系.
- 为优化NAR剂量和减轻毒性提供基础.
主要方法:
- 在雄性C57BL/6小鼠中建立了洛佩拉胺诱导的慢传播便秘模型.
- 系统地研究了不同度的NAR对肠道运动,MAO活性和神经递质代谢的影响.
主要成果:
- NAR (25-300 mg/kg) 选择性抑制了MAO-A,降低了5-基三胺 (5-HT) 代谢,并增强了肠道运动性.
- 在较高度 (≥150 mg/kg) 时,NAR也抑制了MAO-B,扰乱了多巴胺代谢并增加了多巴胺水平.
- 在较高剂量的NAR中激活多巴胺通路,抑制了结肠周立体.
结论:
- 纳林根因显示MAO-A/B活动的门依赖调节.
- 这种依赖于值的抑制允许对肠道运动的双向调节.
- NAR对MAO亚型的双重作用为运动障碍的治疗应用提供了潜在的潜力.
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